CN207537406U - A kind of gasification furnace slag discharge and catalyst recovery system - Google Patents

Abstract

The utility model provides a kind of gasification furnace slag discharge and catalyst recovery system.Including：Shock chamber, at least one slag lock, the circulating pump being arranged in a one-to-one correspondence with each slag lock；Shock chamber is connected with gasification furnace, for receiving the lime-ash of gasification furnace discharge, and the temperature of lime-ash is down to preset value；The first charging aperture of slag lock is connected with shock chamber, and slag lock receives the slurry of the discharge port output of shock chamber, and carries out reclaimer operation to the catalyst in slurry；The feed inlet of circulating pump is connected with the discharge port of slag lock, the discharge port of circulating pump is connected with the second charging aperture of slag lock, circulating pump receives the part slurry of slag lock discharge and solid-liquid mixture obtained by the reaction is delivered in solid-liquid separation system by being delivered to after the part slurry boosting after the completion of the catalyst recycling reaction in slag lock and in slag lock.The utility model simplifies technique, takes full advantage of the sensible heat of lime-ash, improves the utilization ratio of energy.

Description

A gasification furnace slagging and catalyst recovery system

technical field

The utility model relates to the technical field of coal chemical industry, in particular to a gasification furnace slag discharge and catalyst recovery system.

Background technique

Coal catalytic gasification is a process in which coal and water vapor directly react under the action of a catalyst under certain temperature and pressure conditions to generate methane-rich gas and high value-added oil products. In this process, alkali metal catalysts, especially potassium-based catalysts, have good low-temperature performance and catalytic performance for water-gas shift and methanation reactions, but the price and cost of potassium catalysts are relatively high. Therefore, the ash discharged from the catalyst from the gasifier Recycling and reuse in the catalytic gasification process is an important link related to whether the overall process of catalytic gasification is economically feasible.

In the prior art, gasification ash is firstly discharged from the bottom of the gasification furnace into the high-pressure quenching chamber, where the temperature is rapidly lowered to 70-80°C in the quenching chamber, and the quenched ash is discharged from the quenching chamber into the high-pressure slag Then the slag lock is released to normal pressure, and finally the ash is discharged from the normal pressure slag lock into the normal pressure slag hopper. The ash discharged from the atmospheric pressure slag hopper is transported to the catalyst recovery reactor. The ash needs to be heated and pressurized again in the reactor, and a stirrer is installed in the reactor to promote the ash and water in the reactor. Mixing is performed to perform a recovery reaction of the catalyst. The whole process is complicated and consumes a lot of energy.

Contents of the invention

In view of this, the utility model proposes a gasifier slag removal and catalyst recovery system, aiming at solving the problems of complex and high energy consumption in the existing gasifier slag removal and catalyst recovery process.

In one aspect, the utility model proposes a gasifier slagging and catalyst recovery system, the system comprising: a chilling chamber, at least one slag lock, and a circulation pump corresponding to each of the slag locks; wherein, The feed port of the quenching chamber communicates with the slagging outlet of the gasification furnace, and the quenching chamber is used to receive the ash discharged from the slagging outlet of the gasification furnace, and to discharge the ash and slag The temperature of the slag lock is reduced to a preset value; the first feed port of the slag lock is connected with the discharge port of the quenching chamber, and the slag lock is used to receive the slag output from the discharge port of the quenching chamber slurry, and recover the catalyst in the slurry; the feed port of the circulation pump is connected with the discharge port of the slag lock, and the discharge port of the circulation pump is connected with the first discharge port of the slag lock. The two feed ports are connected, and the circulation pump is used to receive part of the slurry discharged from the discharge port of the slag lock and transport the part of the slurry to the slag lock after boosting the pressure, and After the catalyst recovery reaction in the lock is completed, the solid-liquid mixture material obtained from the reaction is sent to the solid-liquid separation system.

Further, in the above-mentioned gasifier slagging and catalyst recovery system, there are multiple slag locks and the circulation pump, and the first feed port of each slag lock is connected to the cooling chamber The discharge port of each slag lock is connected with the feed port of the corresponding circulating pump, and the second feed port of each slag lock is connected with the corresponding set The discharge ports of the circulating pumps are connected.

Further, in the above gasifier slagging and catalyst recovery system, a disturbance mechanism for disturbing the slag in the slag lock is provided inside the slag lock.

Further, in the above gasifier slagging and catalyst recovery system, the disturbance mechanism includes: a plurality of partitions; wherein, each of the partitions is connected to the inner wall of the slag lock and along the inner wall of the slag lock Axial distribution.

Further, in the above-mentioned gasifier slagging and catalyst recovery system, one end of each partition is attached to the inner wall of the slag lock, and the other end is a free end, and the free end of each partition is connected to the inner wall of the slag lock. There is a gap between the inner walls of the slag lock.

Furthermore, in the above gasifier slagging and catalyst recovery system, the partitions are alternately arranged on both sides of the inner wall of the slag lock.

Further, in the above gasifier slagging and catalyst recovery system, the partition plate includes an arc-shaped edge, and the arc-shaped edge of the partition plate is in contact with the inner wall of the slag lock.

Furthermore, in the above gasifier slagging and catalyst recovery system, the cross-sectional area of the partition is 2/5-4/5 of the cross-sectional area of the slag lock.

Furthermore, in the above gasifier slag removal and catalyst recovery system, through holes for the slag to pass through are opened on the partition plates.

Further, in the above gasifier slagging and catalyst recovery system, an electric heat tracing device is installed on the connecting pipeline between the slag lock and the quenching chamber.

Further, in the above gasifier slagging and catalyst recovery system, the outer wall of the slag lock is surrounded by a heating coil.

Further, in the above gasifier slagging and catalyst recovery system, the inlet of the heating coil is located at the bottom of the slag lock; the distance between the outlet of the heating coil and the bottom of the slag lock is 3/5-4/5 of the height.

Furthermore, in the above gasifier slagging and catalyst recovery system, the longitudinal section of the lower head of the slag lock is semicircular or semielliptical.

Compared with the prior art, the beneficial effect of the utility model is that the gasification furnace slagging and catalyst recovery system provided by the utility model can reduce the temperature of the ash and slag by discharging the ash in the gasifier into the chilling chamber. After falling to the preset value, it enters the slag lock for catalyst recovery reaction. During the reaction, part of the slurry in the slag lock is transported to the circulating pump, and the circulating pump pressurizes the part of the slurry and then enters it into the slag lock and The remaining part of the slurry is fully mixed, which promotes the catalyst recovery reaction. Compared with the prior art, the ash is cooled to 70-80°C in the quenching chamber and then enters the slag lock. The ash is finally discharged from the slag lock and transported to Compared with the catalyst recovery process in the catalyst recovery reactor, the catalyst recovery reaction in this embodiment is carried out in the slag lock. On the one hand, the process is simplified and the catalyst recovery efficiency is improved; on the other hand, in the slag discharge process, The sensible heat of the ash is fully utilized to provide the heat required for catalyst recovery, save cooling water, and improve energy utilization efficiency.

Description of drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiment. The drawings are only for the purpose of illustrating preferred embodiments, and are not considered to limit the present invention. Also throughout the drawings, the same reference numerals are used to designate the same components. In the attached picture:

Fig. 1 is a schematic structural diagram of a gasifier slagging and catalyst recovery system provided by an embodiment of the present invention;

Fig. 2 is another structural schematic diagram of the gasifier slagging and catalyst recovery system provided by the embodiment of the present invention;

Fig. 3 is a structural schematic diagram of the slag lock in the gasifier slag removal and catalyst recovery system provided by the embodiment of the present invention;

Fig. 4 is a top view of the separator in the gasifier slag removal and catalyst recovery system provided by the embodiment of the present invention.

Detailed ways

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

Referring to Fig. 1, the gasifier slagging and catalyst recovery system of the embodiment of the utility model includes: a quenching chamber 2, at least one slag lock 3, and a circulation pump 4 corresponding to each slag lock 3 one by one.

Specifically, the feed port 21 of the quenching chamber 2 communicates with the slag outlet 11 of the gasifier 1, and the quenching chamber 2 is used to receive the ash discharged from the slag outlet of the gasifier 1, and to discharge the ash The temperature drops to the preset value. The quenching chamber 2 can communicate with the bottom of the gasifier 1 through a slagging pipeline, and a shut-off valve a is arranged on the slagging pipeline. The outer wall of the quenching chamber 2 is also provided with a cooling water inlet for reducing the temperature of the ash in the quenching chamber 2 to below 300°C and for keeping the pressure difference between the quenching chamber 2 and the gasifier 1 at 10-50KPa gas inlet, wherein the gas introduced from the gas inlet is an inert gas, such as N ₂ , Ar gas, etc. Correspondingly, a thermometer port (not shown in the figure) and a pressure gauge port (not shown in the figure) are also opened on the side wall of the quenching chamber, and the temperature of the ash in the quenching chamber 2 is detected online through the thermometer and pressure gauge and pressure, thereby adjusting the amount of cooling water to control the temperature of the ash in the chilling chamber 2.

The first feed port 31 of the slag lock 3 communicates with the discharge port 22 of the quenching chamber, and the slag lock 3 is used to receive the slurry output from the discharge port 22 of the quenching chamber 2, and to carry out the catalyst in the slurry recycling operations. The slag lock 3 communicates with the quenching chamber 2 through the slag discharge pipeline, and a cut-off valve b is arranged on the slag discharge pipeline. The slag lock 3 is provided with an air inlet (not shown in the figure) for stamping the slag lock 3 so that the pressure difference between the quenching chamber 2 and the slag lock 3 is kept between 10-50KPa and for pressing the slag lock. 3. Release the pressure to the gas outlet (not shown in the figure) suitable for the pressure required by the catalyst recovery reaction. For example, the final pressure in the slag lock 3 can be maintained at 1-2Mpa, preferably 1-1.5Mpa. The gas fed into the gas inlet and the gas output from the gas outlet are all inert gases such as N ₂ and Ar gas. Correspondingly, the outer wall of the slag lock 3 can also be provided with a thermometer port and a pressure gauge port, and the temperature and pressure of the slurry in the slag lock 3 can be detected online through the thermometer and pressure gauge, so as to adjust the temperature of the slurry in the slag lock 3 to the catalyst level. The temperature required for the recovery reaction. In addition, the outer wall of the slag lock 3 is also provided with a second feed port 32 communicating with the discharge port 42 of the circulating pump 4 . In the prior art, the lower head of the slag lock 3 mostly adopts a triangular prism or a polygonal pyramid. If the head of this form is under high pressure for a long time, the service life of the slag lock 3 will be greatly affected. The longitudinal section of the lower head of the slag lock 3 in this embodiment can be semicircular or semi-elliptical. These two types of heads have better stress conditions under high pressure and can prolong the service life of the slag lock 3. In addition, in this embodiment, the circulation pump 4 is used to cooperate with the slag lock 3 to discharge the material in the slag lock 3, which eliminates the adverse effect of the semicircular or semi-elliptical head on slag discharge.

The feed port 41 of the circulation pump 4 is connected with the discharge port 33 of the slag lock 3, the discharge port 42 of the circulation pump 4 is connected with the second feed port 32 of the slag lock 3, and the circulation pump 4 is used to receive the slag lock Part of the slurry discharged from the discharge port 33 of 3 and part of the slurry is boosted and the boosted part of the slurry is transported to the slag lock 3, and after the catalyst recovery reaction in the slag lock 3 is completed, the reaction is obtained The solid-liquid mixture material is sent to the solid-liquid separation system. The feed port 41 of the circulation pump 4 is connected with the discharge port 33 of the slag lock 3 through the slag discharge pipeline, and a cut-off valve c is arranged on the slag discharge pipeline; The second feed port 32 of the lock 3 is connected, and an opening connected with the solid-liquid separation pipeline B is also provided on the circulation pipeline A, wherein, the circulation pipeline A is provided with a cut-off valve e, and the solid-liquid separation pipeline B is provided with a Shut-off valve d.

When both the slag lock 3 and the circulating pump 4 are one, the working process of this embodiment is as follows: open the cut-off valve a between the gasification furnace 1 and the quenching chamber 2, and adjust the quenching through the pressure gauge on the outer wall of the quenching chamber 2 The pressure in the chamber 2, so that the ash enters the quenching chamber 2 under the action of gravity and pressure difference and mixes with the cooling water input through the cooling water inlet to form a slurry. When the volume of the slurry in the quenching chamber 2 When reaching a certain value, close the cut-off valve a, and monitor the temperature in the quenching chamber 2 in real time through the thermometer on the outer wall of the quenching chamber 2 during the process, thereby adjusting the amount of cooling water to reduce the temperature of the ash to below 300°C; Before the slag slurry in the quenching chamber 2 is discharged into the slag lock 3, the gas outlet valve of the slag lock 3 is closed, and the slag lock 3 is stamped through the air inlet of the slag lock 3, so that the quenching chamber 2 and the slag lock 3 The pressure difference is between 10-50KPa, then open the cut-off valve b between the quenching chamber 2 and the slag lock 3, the slurry in the quenching chamber 2 is discharged into the slag lock 3, when the slurry in the quenching chamber 2 After the discharge is completed, close the shut-off valve b between the chilling chamber 2 and the slag lock 3, open the shut-off valve at the gas outlet of the slag lock 3, and release the pressure in the slag lock 3 to a place suitable for catalyst recovery reaction. pressure as needed. Open the cut-off valve c, discharge part of the slurry in the slag lock 3 into the circulation pump 4, and after part of the slurry is pressurized by the circulation pump 4, open the cut-off valve e to transport part of the slurry after the pressurization through the circulation pipeline A to In the slag lock 3, the slurry is fully mixed with the slurry remaining in the slag lock 3, such as full suspension mixing, to complete the recovery reaction of the catalyst; after the reaction is completed, open the cut-off valve d, and the solid-liquid mixture after the reaction The material is discharged into the solid-liquid separation system for solid-liquid separation.

From the above, it can be clearly concluded that the gasifier slag removal and catalyst recovery system provided in this embodiment enters into The catalyst recovery reaction is carried out in the slag lock; during the reaction process, part of the slurry in the slag lock is transported to the circulation pump, and the circulation pump pressurizes the part of the slurry and then input it into the slag lock to fully mix with the remaining part of the slurry. The progress of the catalyst recovery reaction is promoted, and the solid-liquid mixture material after the reaction is sent to the solid-liquid separation system. Compared with the prior art in which the ash and slag are cooled to 70-80°C in the chilling chamber and then enter the slag lock, and the ash and slag are finally discharged from the slag lock and then transported to the catalyst recovery reactor for catalyst recovery, this embodiment The recovery reaction of the catalyst in the medium is carried out in the slag lock. On the one hand, the process is simplified and the catalyst recovery efficiency is improved; heat, save cooling water, and improve energy utilization efficiency.

Preferably, referring to FIG. 2 , in the above-mentioned embodiment, there are multiple slag locks 3 and circulating pumps 4 that are provided in one-to-one correspondence, and the first feed port 31 of each slag lock 3 is connected to the cooling chamber 2 The discharge port is connected, and the discharge port 32 of each slag lock 2 is connected with the feed port 41 of the corresponding circulating pump 4, and the second feed port 32 of each slag lock 3 is connected with the corresponding circulating pump 4. The discharge port 42 of the pump 4 is connected. The number of slag locks 3 and circulating pumps 4 may preferably be 1-6, more preferably 2-3.

Continue referring to Fig. 2, when there are three slag locks 3 and circulating pumps 4, the working process of this embodiment is as follows: open the cut-off valve a between the gasifier 1 and the quench chamber 2, and keep the gasifier 1 Continuous slag discharge, adjust the pressure in the cooling chamber 2 through the pressure gauge on the outer wall of the cooling chamber 2, so that the ash enters the cooling chamber 2 under the action of gravity and pressure difference and the cooling water input through the cooling water inlet Mixed into a slurry, during the process, the temperature in the cooling chamber 2 is monitored in real time by the thermometer on the outer wall of the cooling chamber 2, so as to adjust the amount of cooling water to reduce the temperature of the ash to below 300°C.

Before the slag slurry in the quenching chamber 2 is discharged into one of the slag locks 3, the gas outlet valve of the slag lock 3 is closed, and the slag lock 3 is stamped through the air inlet of the slag lock 3, so that the quenching The pressure difference between chamber 2 and the slag lock 3 is between 10-50KPa, then open the cut-off valve b between the quenching chamber 2 and the slag lock 3, and the slurry in the quenching chamber 2 is discharged into the slag lock 3, After the slurry discharge in the quenching chamber 2 is completed, close the shut-off valve b between the quenching chamber 2 and the slag lock 3, open the shut-off valve at the gas outlet of the slag lock 3, and the pressure in the slag lock 3 Perform pressure relief until the pressure required by the catalyst recovery reaction is suitable. Close the cut-off valve b of the slag lock 3, open the cut-off valve c of the slag lock, discharge part of the slurry in the slag lock 3 into the circulation pump 4, and open the cut-off valve after part of the slurry is pressurized by the circulation pump 4. The valve e transports part of the pressurized slurry to the slag lock 3 through the circulation pipeline A, so that the slurry is fully mixed with the slurry remaining in the slag lock 3, such as full suspension mixing, to complete the recovery reaction of the catalyst; After the reaction is completed, the cut-off valve d of the slag lock 3 is opened, and the solid-liquid mixture material after the reaction of the slag lock 3 is discharged into the solid-liquid separation system for solid-liquid separation.

In the above process, while closing the shut-off valve b of the slag lock 3, open the shut-off valve b of any one of the remaining two slag locks 3 to receive the ash discharged from the gasifier 1, and then connect it to the slag lock A circulating pump is used to carry out the catalyst recovery reaction as above, and after the reaction, the solid-liquid mixture material is discharged to the solid-liquid separation system through the corresponding solid-liquid separation pipeline. The operation process of the last slag lock 3 is the same as above, and the opening sequence of the shut-off valves b of the three slag locks 3 is not in particular order, which can be selected according to specific conditions, and is not limited in this embodiment.

It can be clearly concluded from the above that when multiple slag locks 3 are installed, the slurry in the quenching chamber 2 can be discharged into the first slag lock. After the discharge is completed, the first slag lock is used for catalyst recovery. The discharged slag slurry is then discharged into the second slag lock, and so on, which can realize continuous slagging of the gasifier, improve the slagging efficiency of the gasifier, and also improve the recovery efficiency of the catalyst.

In order to avoid the temperature drop during the discharge of the slurry from the quenching chamber 2 to the slag lock 3, in the above-mentioned embodiments, an electric heating device can be installed on the connecting pipeline between the slag lock 3 and the quenching chamber 2, for example, it can be An electric heating cable is wound on the connecting pipeline between the slag lock 3 and the cooling chamber 2 .

Referring to FIG. 3 , in order to keep the slag lock 3 at a constant temperature, a heating coil 6 is provided around the outer wall of the slag lock 3 . High-temperature steam can flow into the heating coil 6 , wherein the steam inlet f and steam outlet g of the heating coil 6 can be located at any position on the outer wall of the slag lock 3 . In addition, a flow meter can be installed on the high-temperature steam inlet pipeline, and the flow rate of high-temperature steam can be adjusted through the flow meter according to the temperature change of the slurry in the slag lock 3 to keep the slag lock 3 at a constant temperature.

Preferably, in order to enable the heating coil 6 to transfer heat to the wall surface of the slag lock 3, the inlet f of the heating coil 6 is located at the bottom of the slag lock 3, and the distance between the outlet g of the heating coil 6 and the bottom of the slag lock 3 is slag lock 3. 3/5-4/5 of the height of the lock 3. During specific implementation, the distance between the steam outlet g of the heating coil 6 and the bottom of the slag lock 3 can be determined according to the filling amount of slurry in the slag lock 3 .

In order to improve the mixing degree of the slurry in the slag lock 3 , a disturbance mechanism for disturbing the slurry in the slag lock 3 may be provided in the slag lock 3 .

Continuing to refer to FIG. 3 , in an implementation of this embodiment, the disturbance mechanism 5 may include a plurality of partitions 51 , wherein each partition 51 is connected to the inner wall of the slag lock 3 and along the axial direction of the slag lock 3 distributed. The partition 51 can be a solid plate, and a passage for the slurry to flow can be set between the partition 51 and the inner wall of the slag lock, or a through hole for the slurry to pass through can be opened on the partition 51, so as to avoid part of the slurry Trapped on the separator 51, it is difficult to mix with other parts of the slurry to participate in the catalyst recovery reaction. The material of the partition 51 can be the same as that of the slag lock 3 , such as duplex stainless steel. During specific implementation, a plurality of partitions 51 may be arranged on both sides of the inner wall of the slag lock 3 and evenly distributed along the axial direction.

In the above embodiment, one end of each partition 51 is in contact with the inner wall of the slag lock 3 , and the other end is a free end. There is a gap between the free ends of each partition 51 and the inner wall of the slag lock 3 . One end of each partition 51 can be welded to the inner wall of the slag lock 3, and the free end of the partition 51 extends to the inner space of the slag lock 3 and has a gap with the inner wall of the slag lock 3 so that the slurry discharged from the quenching chamber 2 and The slurry pressurized by the circulating pump 4 falls to the partitions 51 of each layer in turn, which increases the degree of disturbance of the slurry and accelerates the flow of the slurry discharged from the chilling chamber 2 into the The mixing speed of the slurry in the slag lock 3 improves the recovery rate of the catalyst.

Preferably, the partitions 51 are alternately arranged on both sides of the inner wall of the slag lock 3, that is, two adjacent layers of partitions 51 are respectively distributed on both sides of the inner wall of the slag lock 3, increasing the amount of slurry flowing through each layer of partitions 51 The degree of disturbance of the slurry on the two adjacent partitions 51 enables better mixing of the slurry in the slag lock 3 and improves the recovery rate of the catalyst.

Referring to Fig. 4, further preferably, in each of the above-mentioned embodiments, the partition plate 51 includes an arc-shaped edge, and the arc-shaped edge of the partition plate 51 is attached to the inner wall of the slag lock 3 so that it can be discharged from the quenching chamber 2 The slurry and the slurry pressurized by the circulation pump 4 directly fall on the dividing plate 51.

Specifically, the partition 51 can be a circular plate, a fan-shaped plate, a bow-shaped plate, etc., as long as its arc-shaped side fits with the inner wall of the slag lock 3, so that the slurry can be prevented from directly falling to the bottom of the slag lock 3 and directly Catalyst recovery reactions are carried out by precipitation without mixing with other parts of the slurry.

More preferably, the cross-sectional area of the partition 51 is 2/5-4/5 of the cross-sectional area of the slag lock 3, so that most of the slurry entering the slag lock 3 will fall on each layer of partitions 51 in turn. On the one hand, the amount of slurry treatment per unit time is increased, thereby further improving the recovery rate of the catalyst.

In order to further illustrate the catalyst recovery process of the gasifier slag removal and catalyst recovery system provided by the embodiment of the utility model, a detailed description will be given below in conjunction with the accompanying drawings.

Example 1

Referring to FIG. 1 , the gasifier slagging and catalyst recovery system includes: a quench chamber 2 , a slag lock 3 and a circulation pump 4 . The chilling chamber 2 is connected to the gasifier 1 through a slagging pipeline, and a shut-off valve a is arranged between them. The upper part of the chilling chamber 2 is provided with an air inlet, a cooling water inlet, a thermometer and a pressure gauge port (not shown in the figure). The discharge port of the quenching chamber 2 is connected with the first feed port of the slag lock 3, and a cut-off valve b is arranged between them. The upper part of the slag lock 3 is provided with an air inlet, an air outlet, a thermometer port, a pressure gauge port, a second Two feeding ports. The lower part of the slag lock 3 is connected with the circulation pump 4, and a cut-off valve c is arranged between them. The lower head of the slag lock 3 is set as a semicircle. The outer wall of the slag lock 3 is provided with a heating coil 6, and the outlet of the heating coil 6 is located at 80% of the volume of the slag lock 3 to maintain the temperature in the slag lock. The area accounts for 4/5 of the cross-sectional area of the slag lock, and the fixed end of the partition 51 is welded together with the slag lock 3 to promote the mixing of materials in the slag lock.

The ash and slag discharged from the bottom of the gasifier 1 enters the quench chamber 2 to be cooled to 150°C, and the mass ratio of cooling water to ash and slag is 3:1. In order to ensure that the ash from the gasification furnace 1 can be smoothly discharged into the quenching chamber 2, the pressure difference between the gasification furnace 1 and the quenching chamber 2 is maintained at 50KPa. In order to ensure that the materials in the quenching chamber 2 can be smoothly discharged into the slag lock 3, the slag lock 3 is stamped to keep the pressure difference between the quenching chamber 2 and the slag lock 3 at 50KPa.

The slurry is subjected to catalyst recovery reaction in the slag lock 3. In order to ensure the mixing degree of the materials, some materials are pressurized by the circulating pump 4 and then input into the slag lock 3 through the circulation line A, so that the slurry is evenly mixed in the slag lock 3. The catalyst recovery reaction is completed. After the reaction is completed, the shut-off valve d on the solid-liquid separation pipeline B is opened to discharge the slurry into the solid-liquid separation system for solid-liquid separation.

Example 2

Referring to FIG. 2 , the gasifier slagging and catalyst recovery system includes: a quenching chamber 2 , three slag locks 3 and three circulating pumps 4 . The chilling chamber 2 is connected to the gasifier 1 through a slagging pipeline, and a shut-off valve a is arranged between them. The upper part of the chilling chamber 2 is provided with an air inlet, a cooling water inlet, a thermometer and a pressure gauge port (not shown in the figure). The discharge port of the quenching chamber 2 is connected to the first feed port of each slag lock 3, and a cut-off valve b is arranged between each slag lock 3 in the quenching chamber 2, and a valve b is arranged on the upper part of each slag lock 3 Air inlet, air outlet, thermometer port, pressure gauge port, second feed port. The lower part of each slag lock 3 is respectively connected with the corresponding circulation pump 4 , and a shut-off valve c is arranged between each slag lock 3 and the circulation pump 4 . The lower head of the slag lock 3 is set in a semi-elliptical shape. The outer wall of the slag lock 3 is provided with a heating coil 6, and the outlet of the heating coil 6 is located at 60% of the volume of the slag lock to maintain the temperature inside the slag lock. A partition is arranged inside the slag lock, and the area of the partition accounts for 3/ 4 The cross-sectional area of the slag lock is welded with the slag lock to promote the mixing of materials in the slag lock.

The ash discharged from the bottom of the gasifier 1 enters the chill chamber 2 to be cooled to 200°C, and the mass ratio of cooling water to ash is 2:1. In order to ensure that the ash from the gasification furnace 1 can be smoothly discharged into the quenching chamber 2, the pressure difference between the gasification furnace 1 and the quenching chamber 2 is maintained at 10KPa. In order to ensure that the materials in the quenching chamber 2 can be smoothly discharged into each slag lock 3, one of the slag locks 3 is stamped first, and the pressure difference between the quenching chamber 2 and the slag lock 3 is kept at 10KPa.

The slurry undergoes catalyst recovery reaction in the above-mentioned slag lock 3, and part of the material is pumped into the slag lock 3 through the circulation pipeline A after being pressurized by the circulating pump 4 connected to the slag lock, so that the slurry is in the slag lock 3 Complete suspension and mixing to complete the catalyst recovery reaction. When the slag slurry carries out the catalyst recovery reaction in the slag lock, close the shut-off valve b between the slag lock and the quenching chamber, open the shut-off valve b of any one of the remaining two slag locks 3, and receive the The discharged ash, and then carry out the above catalyst recovery reaction through the circulation pump connected with the slag lock, the operation process of the last slag lock 3 is the same as above, after the catalyst recovery reaction in each slag lock 3 is completed, open the solid-liquid separation Shut-off valve d on the pipeline, the reacted slurry is discharged into the solid-liquid separation system after the solid-liquid separation pipeline merges for solid-liquid separation.

Obviously, those skilled in the art can make various changes and modifications to the utility model without departing from the spirit and scope of the utility model. In this way, if these modifications and variations of the utility model fall within the scope of the claims of the utility model and equivalent technologies thereof, the utility model is also intended to include these modifications and variations.

Claims (12)

1. A gasifier slagging and catalyst recovery system, characterized in that it includes: a quenching chamber (2), at least one slag lock (3), and a one-to-one correspondence with each of the slag locks (3) circulation pump (4); wherein, The feed port (21) of the quenching chamber (2) communicates with the slag outlet (11) of the gasifier (1), and the quenching chamber (2) is used to receive the gasifier (1) the ash discharged from the slag outlet (11), and reduce the temperature of the ash to a preset value; The first feed port (31) of the slag lock (3) communicates with the discharge port (22) of the quench chamber (2), and the slag lock (3) is used to receive the quench chamber (2) the slurry output from the discharge port (22), and recover the catalyst in the slurry; The feed port (41) of the circulation pump (4) is connected with the discharge port (33) of the slag lock (3), and the discharge port (42) of the circulation pump (4) is connected with the slag lock (3). The second feed port (32) of the lock (3) is connected, and the circulation pump (4) is used to receive part of the slurry discharged from the discharge port (33) of the slag lock (3) and transfer the part After the slurry is pressurized, it is transported to the slag lock (3), and after the catalyst recovery reaction in the slag lock (3) is completed, the solid-liquid mixture material obtained by the reaction is transported to the solid-liquid separation system. 2. The gasifier slagging and catalyst recovery system according to claim 1, characterized in that, the slag lock (3) is provided with a disturbance for disturbing the slag slurry in the slag lock (3) institutions (5). 3. The gasifier slagging and catalyst recovery system according to claim 2, the disturbance mechanism (5) comprises: a plurality of partitions (51); wherein, Each partition (51) is connected to the inner wall of the slag lock (3) and distributed along the axial direction of the slag lock (3). 4. The gasifier slagging and catalyst recovery system according to claim 3, characterized in that, one end of each partition (51) is attached to the inner wall of the slag lock (3), and the other end is Free end, there is a gap between the free end of each partition (51) and the inner wall of the slag lock (3). 5. The gasifier slagging and catalyst recovery system according to claim 4, characterized in that, each of the partitions (51) is alternately arranged on both sides of the inner wall of the slag lock (3). 6. The gasifier slagging and catalyst recovery system according to any one of claims 3 to 5, characterized in that, the partition (51) includes an arc-shaped edge, and the partition (51 ) is in close contact with the inner wall of the slag lock (3). 7. The gasifier slagging and catalyst recovery system according to any one of claims 3 to 5, characterized in that the cross-sectional area of the partition (51) is 1/2 of the cross-sectional area of the slag lock 2/5-4/5. 8. The gasifier slagging and catalyst recovery system according to any one of claims 3 to 5, wherein a through hole for the slag to pass through is opened on the partition (51). 9. The gasifier slagging and catalyst recovery system according to claim 1, characterized in that an electric heating device is installed on the connecting pipeline between the slag lock (3) and the quenching chamber (2). 10. The gasifier slagging and catalyst recovery system according to claim 1, characterized in that a heating coil (6) is arranged around the outer wall of the slag lock (3). 11. The gasifier slagging and catalyst recovery system according to claim 10, characterized in that, the inlet of the heating coil (6) is located at the bottom of the slag lock (3); the heating coil ( 6) The distance between the outlet and the bottom of the slag lock (3) is 3/5-4/5 of the height of the slag lock (3). 12. The gasifier slagging and catalyst recovery system according to claim 1, characterized in that the longitudinal section of the lower head of the slag lock (3) is semicircular or semielliptical.