CN210993026U - Heat exchanger and evaporation concentration system - Google Patents

Abstract

The utility model relates to a heat exchanger, including first pipe case subassembly, barrel and first tube sheet, the outer peripheral face of first tube sheet is inwards sunken, and the depressed part forms towards different first connection face and the second connection face of orientation, first pipe case subassembly has and connects the face with the third that first connection face is relative, the barrel has and connects the face relative fourth with the second connection face, first connection face is connected the face welding with the third, the second is connected the face and is connected the face welding with the fourth. The utility model discloses still relate to an evaporative concentration system, including separator and foretell heat exchanger, the separator is used for the warp the stoste of heat exchanger heating carries out the flash distillation. Above-mentioned heat exchanger, first tube sheet need not to be integrative with flange, and thickness is thinner, has reduced heat exchanger's manufacturing cost.

Description

Heat exchanger and evaporation concentration system

Technical Field

The utility model relates to a heat transfer device technical field especially relates to a heat exchanger and evaporative concentration system.

Background

The heat exchanger is one of the main devices of the evaporation concentration system, and can exchange heat between the stock solution and steam to ensure that the temperature of the stock solution is raised to a boiling state, and then the stock solution enters a separator in a negative pressure state for flash evaporation to achieve the effect of waste liquid concentration. In order to prevent stock solution and steam from leaking, the existing heat exchanger is generally provided with titanium tube plates at two ends of a cylinder body to form independent spaces in the cylinder body, and the tube plates are large in thickness and expensive in titanium materials to ensure the pressure bearing capacity and the connection stability, so that the manufacturing cost of the heat exchanger is high.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a heat exchanger and an evaporation concentration system, which address the problem of high manufacturing cost of the heat exchanger.

The utility model provides a heat exchanger, includes first pipe case subassembly, barrel and first tube sheet, the outer peripheral face of first tube sheet is inside sunken, and the depressed part forms towards different first connection face and second connection face, first pipe case subassembly has the third connection face relative with first connection face, the barrel has the fourth connection face relative with second connection face, first connection face welds with the third connection face, the second is connected the face and is welded with the fourth connection face.

In one embodiment, an included angle between the first connecting surface and the third connecting surface is 60 degrees, and an included angle between the second connecting surface and the fourth connecting surface is 60 degrees.

In one embodiment, the first tube plate has a first side surface located on the side where the first tube box assembly is located, an included angle between the first side surface and the first connection surface is 30 degrees, and an included angle between the first side surface and the second connection surface is 30 degrees.

In one embodiment, the cross section of the recessed portion is triangular or trapezoidal, and when the cross section of the recessed portion is trapezoidal, the recessed portion is further formed with a fifth connecting surface connected to the first connecting surface and a sixth connecting surface connected to the second connecting surface, wherein the fifth connecting surface is connected to the inner wall surface of the first channel assembly, and the sixth connecting surface is connected to the inner wall surface of the cylinder.

In one embodiment, the fifth connecting surface, the sixth connecting surface, a portion of the inner wall surface of the first header assembly, and a portion of the inner wall surface of the cylindrical body are flush.

In one embodiment, when the cross section of the recessed portion is trapezoidal, the first connecting surface is connected to or spaced apart from the third connecting surface, when the first connecting surface is connected to the third connecting surface, the first connecting surface is soldered to the third connecting surface, and at this time, the solder is fixedly connected to the first connecting surface and the third connecting surface, respectively, and when the first connecting surface is spaced apart from the third connecting surface, the first connecting surface, the third connecting surface, and the fifth connecting surface are soldered, at this time, the solder is fixedly connected to the first connecting surface, the third connecting surface, and the fifth connecting surface, respectively.

In one embodiment, when the cross-sectional area of the recessed portion is triangular, the first connection surface and the third connection surface are connected and soldered, and at this time, solder is fixedly connected to the first connection surface and the third connection surface, respectively.

In one embodiment, the first connection surface is connected to or spaced apart from the second connection surface, when the first connection surface is connected to the second connection surface, a connection portion of the first connection surface and the second connection surface is flush with a portion of the outer wall surface of the first tube box assembly and a portion of the outer wall surface of the cylinder, and when the first connection surface is spaced apart from the second connection surface, a portion of the outer circumferential surface that is not recessed inward is flush with a portion of the outer wall surface of the first tube box assembly and a portion of the outer wall surface of the cylinder.

In one embodiment, the first tube box assembly comprises a first cover body, a first tube section and a first connecting flange, one end of the first tube section is welded with the first tube plate, and the other end of the first tube section is detachably connected with the cover body through the first connecting flange; the first connecting flange comprises a first body, a second body and a lining ring, the first body is sleeved at one end of the first cover body, the second body is sleeved at one end of the first shell ring, the first body is fixedly connected with the second body, the lining ring is positioned between the first body and the second body and is abutted against the side wall of the first cover body and the side wall of the first shell ring, so that a closed space is formed in the first tube box assembly.

An evaporation concentration system comprises a separator and the heat exchanger, wherein the separator is used for carrying out flash evaporation on stock solution heated by the heat exchanger.

Above-mentioned heat exchanger through separating first tube sheet and flange, first tube sheet welds with first pipe case subassembly and barrel respectively, makes the thickness of first tube sheet thinner can satisfy fixed and pressure-bearing demand, has reduced the manufacturing cost of heat exchanger.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of a heat exchanger according to the present invention;

FIG. 2 is a schematic view of a part of the structure of the heat exchanger shown in FIG. 1;

FIG. 3 is an enlarged partial view of area A of the heat exchanger portion of FIG. 2;

FIG. 4 is a schematic structural diagram of another embodiment of area A shown in FIG. 3;

FIG. 5 is a schematic structural diagram of another embodiment of area A shown in FIG. 3;

FIG. 6 is a schematic structural diagram of another embodiment of area A shown in FIG. 3;

FIG. 7 is a schematic structural diagram of another embodiment of area A shown in FIG. 3;

fig. 8 is a partially enlarged view of a region B in the partial structure of the heat exchanger shown in fig. 2.

Heat exchanger 100

First channel assembly 110

Stock solution outlet pipe 111

First cover 112

First shell ring 113

First connecting flange 114

First body 115

Second body 116

Liner ring 117

Solder 118

First tubesheet 120

First connection face 121

Second connection face 122

Third connection surface 123

Fourth connection face 124

First side 125

Outer peripheral surface 126

Recess 127

Fifth connection face 128

Sixth connection surface 129

Barrel 130

Steam pipe 131

First noncondensable gas pipe 132

Second noncondensable gas pipe 133

Vapor condensate line 134

Spare pipe 135

Pressure sensor interface conduit 136

Viewing mirror interface conduit 137

Ear mount 138

Lifting lug 139

Second tubesheet 140

Second channel assembly 150

Stock solution inlet pipe 151

Second shell ring 152

Second cover 153

Second connecting flange 154

Heat exchange tube 160

Baffle 161

Distance tube 162

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 and 2, a heat exchanger 100 for heat exchanging a stock solution with steam to raise the temperature of the stock solution to boiling. The heat exchanger 100 may be used in an evaporation concentration system (not shown), and the heated stock solution is input into a separator under negative pressure for flash evaporation, so as to achieve the effect of waste liquid concentration.

Specifically, as shown in fig. 1, the heat exchanger 100 includes a first header assembly 110, a cylinder 130, a second header assembly 150, and heat exchange tubes 160. The cylinder 130 is a substantially hollow cylinder, and has one end fixedly connected to the first channel assembly 110 and the other end fixedly connected to the second channel assembly 150. The first tube box assembly 110 is communicated with a raw liquid outlet pipeline 111, the second tube box assembly 150 is communicated with a raw liquid inlet pipeline 151, and the heat exchange tube 160 is partially positioned in the cylinder 130, and has one end positioned in the raw liquid outlet pipeline 111 and the other end positioned in the raw liquid inlet pipeline 151. Stock solution enters the heat exchange tube 160 from one end of the heat exchange tube 160 positioned in the stock solution inlet pipeline 151, exchanges heat with steam in the cylinder 130, and flows out of the heat exchange tube 160 from one end of the heat exchange tube 160 positioned in the stock solution outlet pipeline 111 after being heated.

Further, as shown in fig. 1, the heat exchanger 100 further includes a first tube plate 120 and a second tube plate 140, wherein the first tube plate 120 is disposed between the cylinder 130 and the first tube box assembly 110, and isolates the cylinder 130 from an inner space of the first tube box assembly 110. The second tube sheet 140 is disposed between the cylinder 130 and the second tube box assembly 150, and isolates the inner space of the cylinder 130 from the inner space of the second tube box assembly 150. The first tube plate 120 and the second tube plate 140 are respectively disposed at two ends of the cylinder 130, so that a closed space is formed in the cylinder 130, and leakage of steam and stock solution is prevented.

Referring to fig. 3, further, the outer peripheral surface 126 of the first tube plate 120 is recessed inward, and the recessed portion 127 is formed toward the first connection surface 121 and the second connection surface 122 which are different. The first header assembly 110 has a third connection surface 123 opposite to the first connection surface 121, the cylinder 130 has a fourth connection surface 124 opposite to the second connection surface 122, the first connection surface 121 is welded to the third connection surface 123, and the second connection surface 122 is welded to the fourth connection surface 124. Of course, the third connecting surface 123 may be formed by partially recessing the first header assembly 110, and the fourth connecting surface 124 may be formed by partially recessing the cylinder 130. The first tube plate 120 is welded to the first tube box assembly 110 and the cylinder 130, and the first tube plate 120 can be fixed and pressure-bearing without being integrated with a connecting flange, so that the thickness of the first tube plate 120 is thinner, and the manufacturing cost is reduced.

In one embodiment, the included angle between the first connection surface 121 and the third connection surface 123 is 60 degrees, and the included angle between the second connection surface 122 and the fourth connection surface 124 is 60 degrees. With such a welding angle, the welding between the first tube plate 120 and the first tube box assembly 110, and between the first tube plate 120 and the tube body 130 can be more tightly secured. Of course, due to the machining error, the included angle between the first connecting surface 121 and the third connecting surface 123 and the included angle between the second connecting surface 122 and the fourth connecting surface 124 may be allowed to have an error of ± 5 degrees. Alternatively, the included angle between the first connection surface 121 and the third connection surface 123 and the included angle between the second connection surface 122 and the fourth connection surface 124 may also be other applicable angles as long as the first tube plate 120 and the first tube box assembly 110, and the first tube plate 120 and the cylinder 130 are tightly welded.

In one embodiment, the first tube sheet 120 has a first side surface 125 located at a side of the first tube box assembly 110, an included angle between the first side surface 125 and the first connection surface 121 is 30 degrees, and an included angle between the first side surface 125 and the second connection surface 122 is 30 degrees. At this time, the angles of the first connecting surface 121 and the second connecting surface 122 to be processed are the same, and the same mold or process parameters can be used for processing, which is convenient for mass production. It can be understood that, when the included angle between the first connecting surface 121 and the third connecting surface 123 and the included angle between the second connecting surface 122 and the fourth connecting surface 124 are both 60 degrees, the included angle between the first side surface 125 and the third connecting surface 123 and the included angle between the first side surface 125 and the fourth connecting surface 124 are also 30 degrees.

In one embodiment, the cross-section of the recessed portion 127 is triangular or trapezoidal. Also, when the cross section of the recessed portion 127 is trapezoidal, the recessed portion 127 is further formed with a fifth connection face 128 connected to the first connection face 121, and a sixth connection face 129 connected to the second connection face 122. The fifth connection surface 128 is connected to an inner wall surface of the first header assembly 110, and the sixth connection surface 129 is connected to an inner wall surface of the cylinder 130.

In one embodiment, the fifth connecting surface 128, the sixth connecting surface 129, a portion of the inner wall surface of the first header assembly 110, and a portion of the inner wall surface of the cylinder 130 are flush to facilitate positioning of the first header assembly 110 and the cylinder 130 during installation.

In one embodiment, when the cross section of the recessed portion 127 is trapezoidal, the first connection surface 121 is connected to or spaced apart from the third connection surface 123. As shown in fig. 4 and 5, when the first connection surface 121 is connected to the third connection surface 123, the first connection surface 121 is soldered to the third connection surface 123, and at this time, the solder 118 is fixedly connected to the first connection surface 121 and the third connection surface 123 respectively. At this time, the connection point of the first connection surface 121 and the third connection surface 123 coincides with the connection point of the first connection surface 121 and the fifth connection surface 128. As shown in fig. 3, when the first connection surface 121 is spaced apart from the third connection surface 123, the first connection surface 121, the third connection surface 123 and the fifth connection surface 128 are welded. At this time, the solder 118 is fixedly connected to the first connecting surface 121, the third connecting surface 123 and the fifth connecting surface 128, respectively, so that the contact area between the solder 118 and the first tube sheet 120 is larger, and the soldering is more stable.

Further, in one embodiment, as shown in fig. 3, when the cross section of the recessed portion 127 is trapezoidal, and the first connection surface 121 and the third connection surface 123 are spaced apart, the solder 118 is fixedly connected to the first connection surface 121, the third connection surface 123 and the fifth connection surface 128. The width of the fifth connecting surface 128 is one fourth of the thickness of the first tube plate 120 or less than one fourth of the thickness of the first tube plate 120, and the width of the contact part of the fifth connecting surface 128 and the solder 118 is between 0.3 and 0.5 times the thickness of the sidewall of the cylinder 130. According to the parameters, the arrangement of the concave part 127 and the arrangement of the welding mode are carried out, so that the welding effect is better, and the first tube plate 120 can be better fixed and bear pressure. Optionally, the thickness of the sidewall of the cylinder 130 is 5mm, the width of the contact portion of the fifth connection surface 128 and the solder 118 is 2mm, the thickness of the tube plate 120 is 16mm, and the width of the fifth connection surface 128 is 4 mm. Of course, the dimensions mentioned in the present embodiment may also be other suitable values as long as the fixing and pressure-bearing requirements of the first tube sheet 120 are met.

Referring to fig. 6 and 7, in one embodiment, when the cross-sectional area of the recessed portion 127 is triangular, the first connection surface 121 and the third connection surface 123 are connected and soldered, and at this time, the solder 118 is fixedly connected to the first connection surface 121 and the third connection surface 123, respectively.

It is understood that the welding relationship between the second connection surface 122 and the fourth connection surface 124 may be identical to the welding relationship between the first connection surface 121 and the third connection surface 123, and will not be described herein again.

In one embodiment, the first connecting surface 121 is connected to or spaced apart from the second connecting surface 122. As shown in fig. 4 and 7, when the first connection surface 121 is connected to the second connection surface 122, a connection portion of the first connection surface 121 and the second connection surface 122 is flush with a portion of an outer wall surface of the first header assembly 110 and a portion of an outer wall surface of the cylinder 130. As shown in fig. 3, 5 and 6, when the first connection surface 121 is spaced apart from the second connection surface 122, the portion of the outer peripheral surface 126 that is not recessed is flush with a portion of the outer wall surface of the first tank module 110 and a portion of the outer wall surface of the cylinder 130. In this case, the first tube plate 120 is adapted to the first header assembly 110 and the cylinder 130, so that the material of the first tube plate 120 can be saved.

It is understood that, as shown in fig. 1, the second tube plate 140 is welded to the cylinder 130 and the second tube box assembly 150, respectively, in the same manner as the first tube plate 120 is welded to the cylinder 130 and the first tube box assembly 110, and thus, the description thereof is omitted.

In one embodiment, as shown in fig. 1, the thickness of each of the first tube plate 120 and the second tube plate 140 is set to be 16mm, which can satisfy the fixation between the cylinder 130, the first tube box assembly 110 and the second tube box assembly 150, and can also bear a certain pressure. Of course, the thicknesses of the first tube plate 120 and the second tube plate 140 are not limited as long as the requirements of fixing and pressure bearing can be met and the manufacturing cost can be saved by being thinner than that of the common tube plate integrated with the connecting flange.

Referring to fig. 2, in one embodiment, the first channel assembly 110 includes a first cover 112, a first tube section 113 and a first connecting flange 114. One end of the first tube section 113 is welded to the first tube plate 120, and the other end is detachably connected to the first cover 112 via the first connecting flange 114. The side wall of the first cylindrical section 113 is communicated with the stock solution outlet pipeline 111.

Specifically, as shown in fig. 8, the first connecting flange 114 is a loose flange and includes a first body 115, a second body 116, and a bushing ring 117, and the first body 115, the second body 116, and the bushing ring 117 are substantially circular rings. The first body 115 is sleeved on one end of the first cover 112, the second body 116 is sleeved on one end of the first cylindrical section 113, and the first body 115 and the second body 116 are fixedly connected through bolts. The liner ring 117 is located between the first body 115 and the second body 116, and abuts against the sidewall of the first cover 112 and the sidewall of the first barrel 113, so that a sealed space is formed in the first tube box assembly 110.

It can be understood that, as shown in fig. 8, by providing the first cover 112 detachably connected to the first tube section 113, the first cover 112 can be separated from the first tube section 113 by only taking out the bolts of the first connecting flange 114 and separating the first body 115 from the second body 116, so that the maintenance and observation of the inner space of the first tube box assembly 110 are more convenient. The bushing ring 117 is provided to be non-integral with the first body 115 and the second body 116 by using a loose flange, and the bushing ring 117 abuts against the side walls of the first cover 112 and the first shell ring 113 to seal the inner space of the first header assembly 110. With such an arrangement, the lining ring 117, the first body 115 and the second body 116 can be made of different materials, for example, the lining ring 117 is made of expensive titanium material to avoid corrosion when contacting with the stock solution, and the first body 115 and the second body 116 are made of stainless steel material to reduce the manufacturing cost. Optionally, the liner ring 117 is formed by two parts, one part of the liner ring is fixedly connected with the first body 115, the other part of the liner ring is fixedly connected with the second body 116, and the two parts of the liner ring 117 are tightly abutted when the first body 115 is fixedly connected with the second body 116 through bolts.

Referring to fig. 1, in one embodiment, the second tube box assembly 150 is provided with a second tube section 152, a second cover 153 and a second connecting flange 154, wherein the second cover 153 is communicated with the raw liquid inlet pipe 151. One end of the second shell ring 152 is welded to the second tube plate 140, and the other end is detachably connected to the second cover 153 via the second connecting flange 154. It is understood that the second connecting flange 154 may be configured and connected in the same manner as the first connecting flange 114, and will not be described in detail herein.

In one embodiment, the heat exchanger 100 further comprises baffles 161 and distance tubes 162. The baffle plate 161 is provided with a plurality of blocks and is crosswise arranged on the opposite inner side walls of the cylinder 130, and the maximum length of the baffle plate 161 is smaller than the circumferential diameter of the cylinder 130. The baffle 161 blocks the steam, and divides the space formed by the first tube plate 120, the second tube plate 140 and the cylinder 130 into a plurality of channels circulating back and forth, so as to increase the contact time between the steam and the heat exchange tube 160 and improve the heat exchange efficiency. One end of the distance tube 162 is fixed on the second tube plate 140, and the other end is fixedly connected with the baffle plate 161, so as to fix the baffle plate 161 and keep a certain distance between the baffle plate 161 and the first tube plate 120 and the second tube plate 140. The heat exchange tube 160 is partially located in the cylinder 130 and penetrates through the baffle plate 161, and the baffle plate 161 also plays a role in fixing the heat exchange tube 160.

Optionally, the number of the heat exchange tubes 160 is not limited, and a plurality of heat exchange tubes 160 may be arranged at intervals to improve heat exchange efficiency. The number of the baffle plates 161 and the distance pipes 162 is not limited, and a plurality of baffle plates 161 can be arranged according to actual requirements as long as the contact time of the steam and the heat exchange pipe 160 can be increased and the heat exchange pipe 160 can be fixed. The number of distance tubes 162 can be adjusted accordingly according to the number of baffles 161. It is understood that when one end of the distance tube 162 is fixed with one baffle plate 161, the tube body of the distance tube 162 may penetrate the other baffle plate 161.

In one embodiment, as shown in fig. 1, a steam pipe 131, a first noncondensable gas pipe 132, a second noncondensable gas pipe 133 and a steam condensate pipe 134 are communicated with the side wall of the cylinder 130. External steam enters the cylinder 130 from the steam pipeline 131 to exchange heat with the stock solution in the heat exchange pipe 160. The uncondensed steam is discharged from the first and second uncondensed gas pipes 132 and 133 to the drum 130. The vapor is condensed into liquid after heat exchange, and the liquid flows out of the barrel 130 through the vapor condensation pipeline 134. It will be appreciated that, in use, the cylinder 130 is disposed vertically, the first channel assembly 110 is disposed at an end of the cylinder 130 away from the ground, and the second channel assembly 150 is disposed at an end of the cylinder 130 close to the ground. The vapor condensate line 134 is disposed on a sidewall of the barrel 130 adjacent to the second tube sheet 140. The first noncondensable gas pipe 132 is disposed on the sidewall of the cylinder 130 near the first tube sheet 120. The second non-condensable gas line 133 is disposed between the vapor condensing line 134 and the first non-condensable gas line 132 adjacent to the second tube sheet 140. The steam pipe 131 is disposed between the first non-condensable gas pipe 132 and the second non-condensable gas pipe 133 near the first tube sheet 120.

At this time, the raw liquid flows into the cylinder 130 from the end of the cylinder 130 close to the ground, and flows out of the cylinder 130 from the end of the cylinder 130 far from the ground. After the steam enters the barrel 130 from the steam pipeline 131 and exchanges heat with the stock solution in the heat exchange pipe 160, part of the condensed liquid drops onto the second tube plate 140 and flows out of the barrel 130 through the steam condensed liquid pipeline 134, and part of the non-condensed liquid is discharged out of the barrel 130 when passing through the first non-condensed gas pipeline 132 or the second non-condensed gas pipeline 133. With the arrangement, the steam can fully exchange heat with the stock solution in the heat exchange tube 160 in the cylinder 130 and can be discharged out of the cylinder 130 in time, the flow is smooth, and the heat exchange efficiency is high.

Alternatively, the number and the arrangement position of the various pipes disposed on the sidewall of the barrel 130 are not limited, for example, a plurality of steam condensate pipes 134 are disposed on the sidewall of the barrel 130 near the second tube plate 140, or the second non-condensable gas pipe 133 is disposed at other positions between the first non-condensable gas pipe 131 and the steam condensate pipes 134, so long as the steam is introduced into the barrel 130 to exchange heat with the raw liquid in the heat exchange pipe 160, and the steam and the condensed liquid of the steam are discharged out of the barrel 130 in time.

Referring to fig. 1, in one embodiment, the side wall of the cylinder 130 is further communicated with a standby pipe 135, a pressure sensor interface pipe 136 and a view mirror interface pipe 137. The spare pipe 135 is disposed between the steam pipe 131 and the second noncondensable gas pipe 133, and the spare pipe 135 is closed when not needed, and may be used as a temporary pipe for discharging noncondensable liquid steam or connecting other devices when needed. The pressure sensor interface pipe 136 is disposed on the sidewall of the cylinder 130 near the first tube plate 120, and is used for receiving an external pressure sensor to measure the pressure in the cylinder 130. The view mirror interface conduit 137 provides access to an exterior view mirror for viewing and monitoring conditions within the barrel 130.

In one embodiment, the outer sidewall of the cylinder 130 is further provided with an ear seat 138 and a lifting lug 139. The number of the ear seats 138 is four, and the four ear seats 138 are arranged on the outer side wall of the cylinder 130 at intervals. The ear seat 138 is used for connecting and matching with other equipment when the heat exchanger 100 is installed, and plays a role in bearing the heat exchanger 100. The lifting lugs 139 are arranged in two numbers, and are respectively arranged on two opposite sides of the outer side wall of the cylinder 130. When the heat exchanger 100 is installed, the lifting lug 139 can be connected and matched with equipment such as a crane and the like, so that the heat exchanger 100 is moved to a corresponding position, and the heat exchanger 100 is convenient to install. Of course, the number and the installation position of the ear seat 138 and the lifting lug 139 are not limited as long as the installation of the heat exchanger 100 is facilitated.

An evaporative concentration system (not shown) includes a separator and the heat exchanger 100 described above. When the separator is used, the interior of the separator is in a negative pressure state, and the stock solution enters the separator for flash evaporation after being heated by the heat exchanger 100 to enter a boiling state, so that the effect of concentrating the stock solution is achieved. Wherein, the stock solution can be waste liquid generated in other processes, and the evaporation concentration system is used for concentrating the waste liquid.

In the heat exchanger 100, the raw liquid enters the heat exchange tube 160 from the raw liquid inlet pipe 151, and flows to the part of the heat exchange tube 160 located in the cylinder 130 to exchange heat with the steam entering the cylinder 130, and flows out of the heat exchange tube 160 from the raw liquid outlet pipe 111 after reaching the boiling state. The first tube plate 120 is welded with the first tube box assembly 110 and the cylinder 130, the second tube plate 140 is welded with the cylinder 130 and the second tube box assembly 150, the first tube plate 120 and the second tube plate 140 do not need to be integrated with a connecting flange, the first tube plate 120 and the second tube plate 140 are thinner, fixing and pressure-bearing requirements can be met, and the manufacturing cost of the heat exchanger 100 is reduced.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. The utility model provides a heat exchanger, its characterized in that includes first pipe case subassembly, barrel and first tube sheet, the outer peripheral face of first tube sheet is inside sunken, and the depressed part forms towards different first connection face and the second connection face of orientation, first pipe case subassembly has the third connection face relative with first connection face, the barrel has the fourth connection face relative with the second connection face, first connection face welds with the third connection face, the second is connected the face and is welded with the fourth connection face.

2. The heat exchanger of claim 1, wherein the angle between the first connection surface and the third connection surface is 60 degrees, and the angle between the second connection surface and the fourth connection surface is 60 degrees.

3. The heat exchanger of claim 1, wherein the first tube sheet has a first side surface on a side of the first tube box assembly, wherein an angle between the first side surface and the first connection surface is 30 degrees, and wherein an angle between the first side surface and the second connection surface is 30 degrees.

4. The heat exchanger according to claim 1, wherein the cross section of the depressed portion is triangular or trapezoidal, and when the cross section of the depressed portion is trapezoidal, the depressed portion is further formed with a fifth connection face connected to the first connection face, and a sixth connection face connected to the second connection face, wherein the fifth connection face is connected to the inner wall face of the first header assembly, and the sixth connection face is connected to the inner wall face of the cylinder.

5. The heat exchanger of claim 4, wherein the fifth connection face, the sixth connection face, a portion of an inner wall face of the first header assembly, and a portion of an inner wall face of the cylinder are flush.

6. The heat exchanger of claim 4, wherein the first connecting surface is connected to or spaced from the third connecting surface when the cross section of the recessed portion is trapezoidal, the first connecting surface is soldered to the third connecting surface when the first connecting surface is connected to the third connecting surface, and the solder is fixedly connected to the first connecting surface and the third connecting surface, respectively, and the first connecting surface, the third connecting surface and the fifth connecting surface are soldered to the first connecting surface, the third connecting surface and the fifth connecting surface when the first connecting surface is spaced from the third connecting surface, respectively.

7. The heat exchanger of claim 4, wherein when the cross-sectional area of the recessed portion is triangular, the first connection surface is connected to and soldered to the third connection surface, and solder is fixedly connected to the first connection surface and the third connection surface, respectively.

8. The heat exchanger according to any one of claims 1 to 7, wherein the first connection surface is connected to or spaced from the second connection surface, a connection point of the first connection surface and the second connection surface is flush with a portion of the outer wall surface of the first header assembly and a portion of the outer wall surface of the cylinder when the first connection surface is connected to the second connection surface, and a portion of the outer peripheral surface that is not recessed inward is flush with a portion of the outer wall surface of the first header assembly and a portion of the outer wall surface of the cylinder when the first connection surface is spaced from the second connection surface.

9. The heat exchanger according to any one of claims 1 to 7, wherein the first tube box assembly comprises a first cover body, a first tube section and a first connecting flange, one end of the first tube section is welded with the first tube plate, and the other end of the first tube section is detachably connected with the cover body through the first connecting flange; the first connecting flange comprises a first body, a second body and a lining ring, the first body is sleeved at one end of the first cover body, the second body is sleeved at one end of the first shell ring, the first body is fixedly connected with the second body, the lining ring is positioned between the first body and the second body and is abutted against the side wall of the first cover body and the side wall of the first shell ring, so that a closed space is formed in the first tube box assembly.

10. An evaporative concentration system comprising a separator for flashing stock solution heated by the heat exchanger and the heat exchanger of any one of claims 1 to 9.

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