CN219547016U

CN219547016U - Heating zone dew point control system for industrial electric kiln

Info

Publication number: CN219547016U
Application number: CN202223578210.8U
Authority: CN
Inventors: 王育; 夏鹏; 高立影; 閤海峰
Original assignee: Hengli Eletek Co ltd
Current assignee: Hengli Eletek Co ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-08-18
Anticipated expiration: 2032-12-30

Abstract

The utility model discloses a heating zone dew point control system for an industrial electric kiln, which comprises an electric kiln and humidifying equipment, wherein one end of the humidifying equipment is provided with a pure dry gas branch pipeline, a water inlet and a water vapor branch pipeline, the tail end of the water vapor branch pipeline is connected with the electric kiln, a mass flowmeter is arranged on the pure dry gas branch pipeline, and the heating zone dew point control system further comprises: the dew point detector is used for detecting the size of the dew point in the hearth, the dew point detector is connected with the air pump, and the tail end of the air pump extends to the area to be detected; the dew point detector and the mass flowmeter are connected through a control terminal. And the atmosphere in the detection area is pumped out to the probe of the dew point meter to be detected through a small air pump arranged behind the dew point detector, and the detected result is converted into an electric signal which is negatively fed back to the mass flowmeter to control the air inflow of the mass flowmeter, so that the dew point in a hearth of the heating area is changed until the atmosphere dew point requirement required by a product is met.

Description

Heating zone dew point control system for industrial electric kiln

Technical Field

The utility model relates to the technical field of heat treatment control, in particular to a heating zone dew point control system for an industrial electric kiln.

Background

The strip steel material in the heating zone of the industrial electric kiln can be fully contacted with the protective atmosphere in the kiln, and the surface of the strip steel and the atmosphere in the kiln are subjected to related chemical reactions, so that the surface morphology and the surface characteristics of the strip steel can be changed. Therefore, the protective atmosphere in the annealing furnace needs to be regulated and controlled according to different requirements of the surface quality of the product. Adjusting the dew point of the furnace atmosphere is in fact the oxidizing/reducing properties of the furnace atmosphere, the higher the dew point the more oxidizing the furnace atmosphere and vice versa. The requirements of different steel grades on the atmosphere dew point in the hearth are possibly different in the heating and annealing processes of the electric kiln, so that the atmosphere dew point in the hearth needs to be fully regulated by adopting an effective regulating means.

The existing heating area dew point control scheme for controlling the industrial electric kiln is mainly used for manual adjustment, can not accurately and automatically control and adjust the dew point content in a hearth, is troublesome and complex to operate, increases the labor hour waste of operators, needs real-time observation of parameters and can not realize on-line recording. The scheme is simple to operate, and has effective and accurate automatic control and adjustment requirements on the heating area dew point of the industrial electric kiln.

Disclosure of Invention

In order to realize automatic adjustment of the dew point, the utility model provides a heating zone dew point control system for an industrial electric kiln, which has high control accuracy, can greatly reduce uncertainty of manual adjustment and is simple to operate.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

the utility model provides a heating zone dew point control system for industry electric kiln, includes electric kiln, humidification equipment's one end is provided with pure dry gas branch road pipeline, water inlet and vapor branch road pipeline, vapor branch road pipeline's end is connected with electric kiln pure dry gas branch road pipeline is last to be provided with mass flowmeter still includes:

the dew point detector is used for detecting the size of the dew point in the hearth, and is connected with the air pump, the tail end of the air pump extends to the area to be detected, and the atmosphere in the area to be detected is pumped out to the detection probe of the dew point detector;

the dew point detector and the mass flowmeter are connected through a control terminal.

Further, the water vapor branch pipeline is provided with three pipelines which are respectively and correspondingly connected with the heating zone, the high-temperature zone and the cooling zone of the electric kiln.

Further, the dew point detector is connected with the air pump through a detection pipeline, an electromagnetic valve is arranged on the detection pipeline, and detection of the atmosphere of different areas to be detected of the electric kiln is realized through switching of the electromagnetic valve.

Further, the humidifying equipment internally comprises a heating element and a temperature measuring thermocouple, wherein the heating element is used for heating internal moisture to form water vapor.

Further, a water level detector is arranged in the humidifying equipment, a water inlet pipe is externally connected to the water inlet, and a control valve in communication connection with the water level detector is arranged on the water inlet pipe.

Further, one end of the pure dry gas branch pipeline is connected with a gas source, and the other end of the pure dry gas branch pipeline is divided into three branches to be connected with humidifying equipment.

Further, a filter is provided between the solenoid valve and the dew point detector.

Further, the dew point detector is also provided with an exhaust gas pipeline.

The utility model has the beneficial effects that:

1. the control scheme of the utility model is that the atmosphere in the detection area is pumped out to the probe of the dew point meter for detection through a small air pump arranged behind the dew point detector, the detected result is converted into an electric signal which is negatively fed back to the mass flowmeter to control the air inflow of the mass flowmeter, so that the dew point in a hearth of the heating area is changed until the atmosphere dew point requirement required by a product is met.

2. The pipeline connection is simple in the control scheme, mainly comprises negative feedback control of the electric signal between the dew point detector and the mass flowmeter, does not need manual adjustment, reduces labor cost, can record the size of the inlet gas and the dew point detection structure on a computer in real time for storage, and can provide good data recording and reference for subsequent process improvement.

3. The humidifying equipment is provided with the liquid level detector, water can be automatically added, the water in the humidifying equipment is prevented from being used up, the manual operation time and the operation complexity are greatly simplified, and the humidifying equipment structure is provided with three water vapor branch pipelines, so that atmosphere supplementation can be realized for multiple points in a heating area hearth.

Drawings

The utility model is further described below with reference to the accompanying drawings and examples:

FIG. 1 is a schematic diagram of a heating zone dew point control scheme for an industrial electric kiln in accordance with the present utility model;

FIG. 2 is a schematic diagram of piping connection for a heating zone dew point control system of an industrial electric kiln in accordance with the present utility model;

fig. 3 is a schematic view of a humidifier according to the present utility model.

Wherein: 1. a mass flowmeter; 2. a humidifying device; 3. an electric kiln; 4. an electromagnetic valve; 5. a filter; 6. a dew point detector; 7. an air extracting pump; 8. detecting a pipeline; 203. a water level detector; 204. a water inlet; 205. an air inlet interface of the pure dry gas branch pipeline; 206. an air outlet port of the water vapor branch pipeline; 201. a pure dry gas branch pipeline; 202. a water vapor bypass conduit; 301. a temperature rising region; 302. a high temperature zone; 303. and a cooling zone.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

In the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Referring to fig. 1 to 3, a heating zone dew point control system for an industrial electric kiln comprises an electric kiln 3 and a humidifying device 2, wherein one end of the humidifying device 2 is provided with a pure dry gas branch pipeline 201, a water inlet 204 and a water vapor branch pipeline 202, the tail end of the water vapor branch pipeline 202 is connected with the electric kiln 33, a mass flowmeter 1 is arranged on the pure dry gas branch pipeline 201, and the heating zone dew point control system further comprises:

the dew point detector 6 is used for detecting the dew point in the hearth, the dew point detector 6 is connected with the air pump 7, the tail end of the air pump 7 extends to the area to be detected, and the atmosphere in the area to be detected is pumped out to the detection probe of the dew point detector 6;

the dew point detector 66 and the mass flowmeter 1 are connected through a control terminal.

Specifically, the steam bypass pipeline 202 is provided with three channels, which are respectively and correspondingly connected with the heating zone 301, the high temperature zone 302 and the cooling zone 303 of the electric kiln 3.

The dew point detector 6 is connected with the air pump 7 through a detection pipeline 8, an electromagnetic valve 4 is arranged on the detection pipeline 8, and the detection of the atmosphere of different areas to be detected of the electric kiln 3 is realized through switching of the electromagnetic valve 4.

As shown in fig. 3, in one embodiment of the present utility model:

the humidifying equipment 2 internally comprises a heating element and a temperature measuring thermocouple, wherein the heating element is used for heating internal moisture to form water vapor.

Specifically, a water level detector 203 is disposed in the humidifying device 2, and a first control valve is disposed on the water inlet 204 and is in communication connection with the water level detector 203.

In one embodiment of the present utility model, one end of the pure dry gas branch pipe 201 is connected to a gas source, and the other end is divided into three branches to be connected to the humidifying device 2.

As shown in fig. 3, the pure dry gas branch pipeline 201 is connected with an air inlet interface 205 of the pure dry gas branch pipeline on the humidifying device 2, and the water vapor branch pipeline 202 is connected with an air outlet interface 206 of the water vapor branch pipeline on the humidifying device 2; the check valve is also installed in the concrete actual installation.

Specifically, a filter 5 is further provided between the solenoid valve 4 and the dew point detector 6; the dew point detector 6 is also provided with an exhaust gas pipe.

Fig. 2 is a schematic diagram of pipeline connection for a dew point control scheme of the industrial electric kiln 3, wherein an air source enters a humidifying box 2 to carry away water vapor generated after heating after the air source is subjected to flow rate adjustment by a mass flowmeter 1, and the water vapor enters a heating zone 301, a high temperature zone 302 and a cooling zone 303 of a hearth heating zone 3 respectively. When the size of the dew point value of the hearth is required to be controlled and detected, the small air pump 7 connected to the rear of the dew point instrument is opened, the atmosphere in the hearth passes through the electromagnetic valve 4, passes through the filter 5, reaches the detection size of the dew point instrument 6, and finally the gas is discharged to the exhaust gas pipeline. The dew point instrument 6 converts the dew point value into an electric signal through recording, and feeds the electric signal back to a control terminal (a computer host computer), and finally the control terminal adjusts the size of the mass flowmeter 1 through the electric signal, so that the dew point value of the heating zone 3 in the hearth is within a required range.

In addition, the dew point values in the various areas of the hearth heating area 3 can be detected and controlled by switching the electromagnetic valve 4. The dew point control scheme for the industrial electric kiln 3 can automatically and accurately adjust and control the dew point value of each area in the hearth, is convenient to operate, greatly reduces the manual operation time, and makes data record for the improvement of the customer process in the future.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims

1. The utility model provides a heating zone dew point control system for industry electric kiln, includes electric kiln (3), wetting equipment (2), its characterized in that, the one end of wetting equipment (2) is provided with pure dry gas branch road pipeline (201), water inlet (204) and vapor branch road pipeline (202), the end and the electric kiln (3) of vapor branch road pipeline (202) are connected be provided with mass flowmeter (1) on pure dry gas branch road pipeline (201), still include:

the dew point detector (6) is used for detecting the size of the dew point in the hearth, the dew point detector (6) is connected with the air pump (7), the tail end of the air pump (7) extends to the area to be detected, and the atmosphere in the area to be detected is pumped out to the detection probe of the dew point detector (6);

the dew point detector (6) and the mass flowmeter (1) are connected through a control terminal.

2. The heating zone dew point control system for an industrial electric kiln according to claim 1, wherein the water vapor branch pipeline (202) is provided with three pipelines which are respectively and correspondingly connected with a heating zone (301), a high temperature zone (302) and a cooling zone (303) of the electric kiln (3).

3. The heating area dew point control system for the industrial electric kiln according to claim 1, characterized in that the dew point detector (6) is connected with the air pump (7) through a detection pipeline (8), an electromagnetic valve (4) is arranged on the detection pipeline (8), and detection of atmospheres in different areas to be detected of the electric kiln (3) is realized through switching of the electromagnetic valve (4).

4. A heating zone dew point control system for an industrial electric kiln according to claim 1, characterized in that the humidifying device (2) internally comprises a heating element for heating the internal moisture to form water vapor and a thermo-couple.

5. The heating area dew point control system for the industrial electric kiln according to claim 1, wherein a water level detector (203) is arranged in the humidifying equipment (2), a water inlet pipe is externally connected to the water inlet (204), and a control valve in communication connection with the water level detector (203) is arranged on the water inlet pipe.

6. A heating zone dew point control system for an industrial electric kiln according to claim 1, characterized in that one end of the pure dry gas branch pipe (201) is connected to a gas source, and the other end is divided into three branches to be connected to a humidifying device (2).

7. A heating zone dew point control system for an industrial electric kiln according to claim 3, characterized in that a filter (5) is further arranged between the solenoid valve (4) and the dew point detector (6), and that an exhaust gas duct is further arranged on the dew point detector (6).