Automatic control device for liquid chlorine vaporization

Abstract

The utility model provides a liquid chlorine vaporization automatic control device, which is characterized in that a pressure sensor, a liquid chlorine flow front regulating valve and a liquid chlorine flow rear regulating valve are arranged on a liquid chlorine pipeline, and the liquid chlorine pressure sensor is linked with the liquid chlorine flow front regulating valve; the liquid chlorine flow rear regulating valve is respectively interlocked with the buffer tank pressure sensor and the branch cylinder pressure sensor, so that the automatic control of the liquid chlorine flow is realized; hot water of the liquid chlorine vaporizer adopts an upper inlet and lower outlet mode, and a multi-site temperature detector displays the average temperature value and is interlocked with a hot water flow regulating valve on a hot water supply pipeline, so that the temperature of the vaporizer is automatically controlled; the liquid chlorine pipeline, the hot water supply pipeline, the chlorine gas pipeline and the emergency cooling pipeline are respectively provided with a corresponding stop valve, the chlorine gas emergency pipeline is provided with a safety valve, and the automatic liquid chlorine vaporization control device can realize an automatic emergency function when an alarm is given when an abnormal condition occurs in the operation process.

Description

Technical Field

[0001] The utility model belongs to the field of automatic control, in particular to an automatic control device for liquid chlorine vaporization. Background Art

[0002] Chlorination reaction is a common chemical process in chemical synthesis. The chlorine gas used needs to be liquefied and purified by low-temperature pressure before being vaporized for use. The vaporization process involves high pressure, heating and other processes, and chlorine is a highly toxic gas and highly corrosive in wet state. Therefore, the liquid chlorine vaporization process is a key process for strengthening chemical safety management. According to the requirements of national supervision and management laws and regulations, the chlorination process must be fully automated.

[0003] Triphosgene, also known as bis(dichloromethyl) carbonate, needs to strictly control its flow rate, temperature, pressure and other parameters during the chlorination process using liquid chlorine. The existing liquid chlorine vaporization control system mainly includes liquid chlorine flow control and vaporizer temperature control, wherein the liquid chlorine flow control is mainly achieved by installing a flow meter and a liquid chlorine regulating valve on the liquid chlorine pipeline, installing a pressure sensor at the outlet of the liquid chlorine vaporizer, and interlocking the liquid chlorine flow with the vaporizer outlet pressure; the liquid chlorine vaporizer usually uses hot water to enter from the bottom and exit from the top to achieve the heating and vaporization of liquid chlorine, a temperature sensor is installed in the liquid chlorine vaporizer, and a hot water flow regulating valve is installed on the hot water pipeline, and the hot water flow regulating valve is interlocked with the liquid chlorine vaporizer temperature to achieve vaporizer temperature control. However, the existing liquid chlorine control system has the following main problems: First, the liquid chlorine flow cannot be automatically controlled: especially when the production load changes, the flow regulating valve cannot adjust the outlet pressure of the vaporizer well. When the liquid chlorine pressure fluctuates, the outlet pressure of the vaporizer fluctuates more seriously; second, the vaporizer temperature cannot be automatically controlled: because the water temperature of the vaporizer changes relatively slowly, it is difficult to achieve true automatic control by simply using a hot water flow regulating valve and a temperature interlock; third, there are no emergency protection measures: in abnormal situations such as excessive pressure or chlorine leakage, the existing automation system does not have alarm and automatic emergency handling functions.

[0004] Therefore, although the existing liquid chlorine vaporization control system is equipped with control instruments and control elements, its control still requires manual operation or high-frequency manual intervention. The frequency of manual operation intervention control is generally 2-5 times / min, which makes it difficult to achieve fully automated control. Utility Model Content

[0005] In view of this, the main purpose of the utility model is to provide an automatic control device for liquid chlorine vaporization, which can truly realize automatic control of liquid chlorine vaporization and has the functions of automatic alarm and automatic emergency processing under abnormal circumstances.

[0006] To this end, the utility model provides a liquid chlorine vaporization automatic control device, comprising: a liquid chlorine supply unit, a liquid chlorine vaporizer, a hot water supply unit, a primary chlorine buffer tank and a secondary chlorine buffer tank, wherein the outlet of the liquid chlorine supply unit and the liquid chlorine inlet of the liquid chlorine vaporizer are connected through a liquid chlorine pipeline, and the chlorine outlet of the liquid chlorine vaporizer, the first-stage chlorine buffer tank and the second-stage chlorine buffer tank are connected through a chlorine pipeline;

[0007] The liquid chlorine pipeline is installed with a liquid chlorine pressure sensor, a liquid chlorine flow front regulating valve and a liquid chlorine flow rear regulating valve, and the liquid chlorine pressure sensor and the liquid chlorine flow front regulating valve are signal-interlocked;

[0008] The liquid chlorine vaporizer is provided with a hot water inlet located at the top and a hot water outlet located at the bottom, and the hot water inlet is connected to the hot water supply unit through a hot water supply pipeline; a multi-point temperature detector is installed on the liquid chlorine vaporizer, and a plurality of temperature sensors are connected to the multi-point temperature detector, and the average temperature value of the temperature sensors connected thereto is displayed;

[0009] A hot water flow regulating valve is installed on the hot water supply pipeline, and the hot water flow regulating valve is interlocked with the signal of the multi-point temperature detector;

[0010] The first-stage chlorine buffer tank and the second-stage chlorine buffer tank are respectively installed with buffer tank pressure sensors, and the two buffer tank pressure sensors are respectively interlocked with the liquid chlorine flow post-regulating valve signal.

[0011] Based on the above, the liquid chlorine pressure sensor is also connected to a liquid chlorine pressure alarm component, the multi-point temperature detector is also connected to a vaporizer temperature alarm component, and the buffer tank pressure sensor is also connected to a chlorine gas pressure alarm component. In this way, the alarm reminder function in an emergency situation can be realized.

[0012] In order to improve the ability to respond to emergencies and strengthen the emergency protection of the device, the above-mentioned liquid chlorine vaporization automatic control device also includes: a cooling water supply unit and an emergency absorption treatment unit,

[0013] Wherein, the liquid chlorine vaporizer is also provided with a cooling water inlet, which is connected to the cooling water supply unit through an emergency cooling pipe, a cooling water cut-off valve is installed on the emergency cooling pipe, and a hot water cut-off valve is installed on the hot water supply pipe, and the cooling water cut-off valve and the hot water cut-off valve are respectively interlocked with the multi-point temperature detector signal;

[0014] The first-stage chlorine buffer tank and the second-stage chlorine buffer tank are respectively connected to the inlet of the emergency absorption treatment unit through a chlorine emergency pipeline, and the chlorine emergency pipeline is equipped with two emergency safety valves that respectively control the first-stage chlorine buffer tank and the second-stage chlorine buffer tank;

[0015] A liquid chlorine shut-off valve is installed on the liquid chlorine pipeline, and the liquid chlorine shut-off valve is signal-interlocked with the liquid chlorine pressure sensor;

[0016] Two chlorine gas cut-off valves are installed on the chlorine gas pipeline, and the two chlorine gas cut-off valves respectively control the switch of the chlorine gas outlet of the first-stage chlorine gas buffer tank and the second-stage chlorine gas buffer tank, and the chlorine gas cut-off valves are interlocked with the corresponding buffer tank pressure sensor signal;

[0017] The liquid chlorine pressure sensor, the multi-point temperature detector and the two buffer tank pressure sensors are also respectively and simultaneously signal-interlocked with the liquid chlorine shut-off valve, the cooling water shut-off valve, the hot water shut-off valve and the two chlorine gas shut-off valves.

[0018] In order to improve the ability to prevent and control chlorine gas leakage, the above-mentioned liquid chlorine vaporization automatic control device also includes an environmental chlorine gas monitoring unit, which includes a plurality of chlorine gas monitoring probes installed around the liquid chlorine vaporization automatic control device. The environmental chlorine gas monitoring unit is respectively signal-interlocked with the liquid chlorine cut-off valve, the cooling water cut-off valve, the hot water cut-off valve and the two chlorine gas cut-off valves, and is connected to a chlorine gas leakage alarm component.

[0019] The end of the chlorine gas pipeline is connected with a chlorine gas cylinder, and a chlorine gas cylinder pressure sensor is arranged on the chlorine gas cylinder. The cylinder pressure sensor is interlocked with the signal of the liquid chlorine flow post-regulating valve.

[0020] In order to facilitate the discharge of waste liquid in the liquid chlorine vaporization process, the above-mentioned liquid chlorine vaporization automatic control device also includes a sewage tank and a sewage pipe connected to the inlet of the sewage tank, and the sewage pipe is respectively connected to the hot water outlet, the sewage outlet of the first-stage chlorine buffer tank and the sewage outlet of the second-stage chlorine buffer tank.

[0021] Therefore, the above-mentioned liquid chlorine vaporization automatic control device provided by the utility model includes a two-stage chlorine buffer tank, which can effectively reduce the pressure to the production use pressure, wherein a pressure sensor, a liquid chlorine flow front regulating valve and a liquid chlorine flow rear regulating valve are installed on the liquid chlorine pipeline, and the liquid chlorine pressure sensor and the liquid chlorine flow front regulating valve are signal-interlocked, and the liquid chlorine flow rear regulating valve is signal-interlocked with the two buffer tank pressure sensor signals installed on the two-stage chlorine buffer tank, and the liquid chlorine flow rear regulating valve is further connected to the cylinder pressure sensor. In this way, the liquid chlorine flow rate can be automatically adjusted according to the fluctuation of the liquid chlorine pressure and the fluctuation of the outlet pressure of the liquid chlorine vaporizer, thereby realizing the automatic control of the liquid chlorine flow rate, and even when the production load changes, the liquid chlorine flow rate can be better automatically controlled.

[0022] The hot water of the liquid chlorine vaporizer in the above-mentioned liquid chlorine vaporization automatic control device adopts a top-in and bottom-out mode. The multi-point temperature detector displays the temperature average value of multiple evenly distributed temperature sensors in the vaporizer, and is interlocked with the hot water flow control valve signal on the hot water supply pipeline, thereby realizing accurate adjustment of the vaporizer temperature by controlling the hot water flow, realizing automatic control of the vaporizer temperature, and solving the problem that it is difficult to interlock the hot water flow control valve with the vaporizer temperature signal due to the relatively slow change of the vaporizer water temperature.

[0023] Furthermore, the liquid chlorine pressure sensor, the multi-point temperature detector and the buffer tank pressure sensor are also respectively connected with corresponding alarm components, so that the alarm reminder function in emergency situations can be realized.

[0024] Furthermore, corresponding shut-off valves or safety valves are installed on the liquid chlorine pipeline, hot water supply pipeline, emergency cooling pipeline, chlorine pipeline and chlorine emergency pipeline respectively. When an abnormal situation occurs during the operation of the above-mentioned liquid chlorine vaporization automatic control device and an alarm is generated, the liquid chlorine shut-off valve, hot water shut-off valve and two chlorine shut-off valves can be closed, and the cooling water shut-off valve and two emergency safety valves can be opened, thereby realizing the automatic emergency function for abnormal situations.

[0025] Therefore, the above-mentioned liquid chlorine vaporization automatic control device provided by the utility model can realize automatic control of system pressure and temperature. Except for remote manual intervention operation when starting and stopping, no manual intervention is required during normal operation, which greatly reduces labor costs and labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the structure of an automatic control device for liquid chlorine vaporization provided in an embodiment of the utility model.

[0027] Among them, the numbers in the figure are: liquid chlorine supply unit 1, liquid chlorine pipeline 11, liquid chlorine pressure sensor 12, liquid chlorine pressure alarm component 13, liquid chlorine flow front regulating valve 14, liquid chlorine flow rear regulating valve 15, liquid chlorine shut-off valve 16, liquid chlorine vaporizer 2, multi-point temperature detector 22, temperature sensor 23, vaporizer temperature alarm component 24, chlorine pipeline 3, first-stage chlorine buffer tank 30, buffer tank pressure sensor 31, second-stage chlorine buffer tank 32, chlorine pressure alarm component 33, chlorine shut-off valve 34, hot water supply unit 4, hot water supply pipeline 41, hot water flow regulating valve 42, hot water shut-off valve 43, cooling water supply unit 5, emergency cooling pipeline 51, cooling water shut-off valve 52, emergency absorption treatment unit 6, chlorine emergency pipeline 61, emergency safety valve 62, sewage tank 7, sewage pipeline 71, chlorine gas cylinder 8, gas cylinder pressure sensor 82, chlorine production equipment 9. DETAILED DESCRIPTION

[0028] The technical solution of the utility model is further described in detail below through specific implementation methods.

[0029] Unless otherwise specified, the terms used in this utility model are commonly used in the relevant field. The components and their functions and usage methods, etc., which are not specifically described, are all prior art in the relevant field.

[0030] See also Figure 1 The present embodiment provides a liquid chlorine vaporization automatic control device, comprising a liquid chlorine supply unit 1, a liquid chlorine vaporizer 2, a first-stage chlorine buffer tank 30 and a second-stage chlorine buffer tank 32, a hot water supply unit 4, a cooling water supply unit 5 and an emergency absorption treatment unit 6, wherein the outlet of the liquid chlorine supply unit 1 and the liquid chlorine inlet of the liquid chlorine vaporizer 2 are connected via a liquid chlorine pipeline 11, the chlorine outlet of the liquid chlorine vaporizer 2, the first-stage chlorine buffer tank 30 and the second-stage chlorine buffer tank 32 are connected via a chlorine pipeline 3, and the outlet of the hot water supply unit 4 is connected to the hot water inlet of the liquid chlorine vaporizer 2 via a hot water supply pipeline 41.

[0031] The liquid chlorine pipeline 11 is equipped with a liquid chlorine pressure sensor 12, a liquid chlorine flow front regulating valve 14, a liquid chlorine flow rear regulating valve 15 and a liquid chlorine shut-off valve 16. The liquid chlorine pressure sensor 12 is connected to a liquid chlorine pressure alarm component 13, and is signal-interlocked with the liquid chlorine shut-off valve 16. When the pressure on the liquid chlorine pressure sensor 12 exceeds the set pressure threshold, the liquid chlorine pressure alarm component 13 will issue a liquid chlorine pressure exceeding alarm, and at the same time close the liquid chlorine shut-off valve 16 to achieve emergency protection of the device. The liquid chlorine pressure sensor 12 and the liquid chlorine flow front regulating valve 14 are signal-interlocked, so that the liquid chlorine flow front regulating valve 14 can automatically adjust the liquid chlorine flow in the liquid chlorine pipeline 11 according to the liquid chlorine pressure fluctuation in the liquid chlorine pipeline 11.

[0032] The hot water inlet of the liquid chlorine vaporizer 2 is located at the upper part thereof, and the hot water outlet is located at the bottom thereof. A cooling water inlet is also provided at the upper part of the liquid chlorine vaporizer 2, and the cooling water inlet is connected to the cooling water supply unit 5 through an emergency cooling pipe 51. A multi-point temperature detector 22 is installed on the liquid chlorine vaporizer 2, and a plurality of evenly distributed temperature sensors 23 are connected to the multi-point temperature detector 22. The temperature sensors 23 are respectively arranged at the upper, middle and lower parts of the vaporizer, and the multi-point temperature detector 22 displays the average temperature of the plurality of temperature sensors 23. The vaporizer temperature detector 22 is also connected to a vaporizer temperature alarm component 24, and the vaporizer temperature alarm component 24 is interlocked with the average temperature value signal of the multi-point temperature detector 22. When the average temperature value on the multi-point temperature detector 22 exceeds the set temperature threshold, the vaporization temperature alarm component 24 will issue a vaporization temperature exceeding standard alarm.

[0033] The hot water supply pipe 41 is equipped with a hot water flow regulating valve 42 and a hot water shut-off valve 43. The hot water flow regulating valve 42 is interlocked with the signal of the multi-point temperature detector 22, so that the hot water flow regulating valve 42 can adjust the hot water flow in the hot water supply pipe 41 in real time according to the vaporization temperature in the liquid chlorine vaporizer 2. The emergency cooling pipe 51 is equipped with a cooling water shut-off valve 52. The hot water shut-off valve 43 and the cooling water shut-off valve 52 are respectively interlocked with the signal of the multi-point temperature detector 22. When the multi-point temperature detector 22 shows that the vaporization temperature of the liquid chlorine exceeds the standard, the hot water shut-off valve 43 is closed and the cooling water shut-off valve 52 is opened. In this way, the automatic control of the temperature of the liquid chlorine vaporizer is realized.

[0034] The first-stage chlorine buffer tank 30 and the second-stage chlorine buffer tank 32 are arranged in series and connected by a chlorine pipeline 3. After calculation and design, the two-stage chlorine buffer tank can effectively reduce the pressure to the normal production pressure. The first-stage chlorine buffer tank 30 and the second-stage chlorine buffer tank 32 are respectively installed with a buffer tank pressure sensor 31, and the two buffer tank pressure sensors 31 are respectively interlocked with the liquid chlorine flow post-regulating valve 15, so that the liquid chlorine flow in the liquid chlorine pipeline 11 can be automatically adjusted according to the chlorine pressure fluctuation output by the liquid chlorine vaporizer 2.

[0035] A chlorine shut-off valve 34 is installed on the chlorine pipeline 3 between the first-stage chlorine buffer tank 30 and the second-stage chlorine buffer tank 32, and another chlorine shut-off valve 34 is installed on the chlorine pipeline 3 connected to the chlorine outlet of the second-stage chlorine buffer tank 32. The two chlorine shut-off valves 34 respectively control the switches of the chlorine outlets of the first-stage chlorine buffer tank 30 and the second-stage chlorine buffer tank 32, and the chlorine shut-off valves 34 are connected to the signals of the corresponding buffer tank pressure sensors 31.

[0036] The first-stage chlorine buffer tank 30 and the second-stage chlorine buffer tank 32 are respectively connected to the inlet of the emergency absorption treatment unit 6 through the chlorine emergency pipeline 61, and an emergency safety valve 62 is installed on the chlorine emergency pipeline 61 between the first-stage chlorine buffer tank 30 and the emergency absorption treatment unit 6 and on the chlorine emergency pipeline 61 between the second-stage chlorine buffer tank 32 and the emergency absorption treatment unit 6. When the pressure on the chlorine emergency pipeline 61 connected to each stage of the chlorine buffer tank exceeds the threshold value of the corresponding emergency safety valve 62, the emergency safety valve 62 will start.

[0037] A chlorine gas pressure alarm assembly 33 is installed on each buffer tank pressure sensor 31. When the pressure on the buffer tank pressure sensor 31 exceeds the set pressure threshold, the liquid chlorine pressure alarm assembly 33 will issue a chlorine gas pressure exceeding alarm, and at the same time close the two chlorine gas cut-off valves 34 and open the emergency safety valve 62 to realize emergency protection of the device.

[0038] Furthermore, in order to improve the ability to prevent and control chlorine gas leakage, the liquid chlorine vaporization automatic control device also includes an environmental chlorine gas monitoring unit (not shown), which includes a plurality of chlorine gas monitoring probes installed around the liquid chlorine vaporization automatic control device. The environmental chlorine gas monitoring unit is respectively signal-interlocked with the liquid chlorine shut-off valve, the cooling water shut-off valve, the hot water shut-off valve and the two chlorine gas shut-off valves, and is connected to a chlorine gas leakage alarm component.

[0039] Furthermore, in order to facilitate the discharge of waste liquid in the liquid chlorine vaporization process, the liquid chlorine vaporization automatic control device also includes a sewage tank 7 and a sewage pipe 71 connected to the inlet of the sewage tank 7, and the sewage pipe 71 is respectively connected to the hot water outlet of the liquid chlorine vaporizer 2 and the chlorine outlet of each stage of the chlorine buffer tank.

[0040] Furthermore, when the chlorine gas formed after vaporization participates in multiple productions, the end of the chlorine gas pipeline 3 is connected to the inlet of the chlorine gas cylinder 8, and the chlorine gas cylinder 8 is provided with multiple chlorine gas outlets connected to the chlorine gas production equipment 9. The chlorine gas cylinder 8 is provided with a cylinder pressure sensor 82, and the cylinder pressure sensor 82 is signal-interlocked with the liquid chlorine flow post-regulating valve 15, so that the liquid chlorine flow in the liquid chlorine pipeline 11 can be automatically adjusted according to the pressure fluctuation when the chlorine gas is used for production.

[0041] Therefore, during the operation of the above-mentioned liquid chlorine vaporization automatic control device provided by the utility model, a pressure sensor, a liquid chlorine flow front regulating valve and a liquid chlorine flow rear regulating valve are installed on the liquid chlorine pipeline, and the liquid chlorine pressure sensor and the liquid chlorine flow front regulating valve are interlocked, and the liquid chlorine flow rear regulating valve is interlocked with two buffer tank pressure sensors and the gas cylinder pressure sensor respectively. In this way, the liquid chlorine flow can be automatically adjusted according to the fluctuation of the liquid chlorine pressure and the fluctuation of the chlorine gas pressure, thereby realizing the automatic control of the liquid chlorine flow, and even when the production load changes, the liquid chlorine flow can be better automatically controlled.

[0042] Furthermore, the liquid chlorine pressure sensor, multi-point temperature detector, buffer tank pressure sensor and environmental chlorine monitoring unit are also respectively connected to corresponding alarm components, so that the alarm reminder function of abnormal situations such as vaporizer temperature, chlorine pressure, liquid chlorine pressure, chlorine leakage, etc. can be realized in emergency situations.

[0043] Furthermore, corresponding shut-off valves or safety valves are installed on the liquid chlorine pipeline, hot water supply pipeline, chlorine pipeline, emergency cooling pipeline and chlorine emergency pipeline respectively. When an abnormal situation occurs during operation and an alarm is generated, the liquid chlorine vaporization automatic control device can close the liquid chlorine shut-off valve, hot water shut-off valve and two chlorine shut-off valves, and open the cooling water shut-off valve and two emergency safety valves, thereby realizing the automatic emergency response function for abnormal situations.

[0044] In short, the above-mentioned automatic control device for liquid chlorine vaporization can realize automatic control of system pressure and temperature. Except for remote manual intervention during start-up and shutdown, no manual intervention is required during normal operation, which greatly reduces labor costs and labor intensity. After commissioning and trial operation, the above-mentioned automatic control device for liquid chlorine vaporization has been operating safely and stably for at least 18 months.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the utility model, which should be included in the scope of the technical solution for protection of the utility model.

Claims

1. A liquid chlorine vaporization automatic control device, characterized in that: It comprises a liquid chlorine supply unit, a liquid chlorine vaporizer, a hot water supply unit, a primary chlorine buffer tank and a secondary chlorine buffer tank, wherein the outlet of the liquid chlorine supply unit and the liquid chlorine inlet of the liquid chlorine vaporizer are connected through a liquid chlorine pipeline, and the chlorine outlet of the liquid chlorine vaporizer, the first-stage chlorine buffer tank and the second-stage chlorine buffer tank are connected through a chlorine pipeline; The liquid chlorine pipeline is installed with a liquid chlorine pressure sensor, a liquid chlorine flow front regulating valve and a liquid chlorine flow rear regulating valve, and the liquid chlorine pressure sensor and the liquid chlorine flow front regulating valve are signal-interlocked; The liquid chlorine vaporizer is provided with a hot water inlet at the top and a hot water outlet at the bottom, and the hot water inlet is connected to the hot water supply unit through a hot water supply pipeline; a multi-point temperature detector is installed on the liquid chlorine vaporizer, and a plurality of temperature sensors are connected to the multi-point temperature detector, and the average temperature value of the temperature sensors connected thereto is displayed; A hot water flow regulating valve is installed on the hot water supply pipeline, and the hot water flow regulating valve is interlocked with the average temperature value signal of the multi-point temperature detector; The first-stage chlorine buffer tank and the second-stage chlorine buffer tank are respectively installed with buffer tank pressure sensors, and the two buffer tank pressure sensors are respectively interlocked with the liquid chlorine flow post-regulating valve signal.

2. The automatic control device according to claim 1, characterized in that: The liquid chlorine pressure sensor is also connected to a liquid chlorine pressure alarm component, the multi-point temperature detector is also connected to a vaporizer temperature alarm component, and the buffer tank pressure sensor is also connected to a chlorine gas pressure alarm component.

3. The automatic control device according to claim 2, characterized in that: It also includes a cooling water supply unit and an emergency absorption treatment unit, wherein the liquid chlorine vaporizer is also provided with a cooling water inlet located at the upper part, the cooling water inlet is connected to the cooling water supply unit through an emergency cooling pipeline, a cooling water cut-off valve is installed on the emergency cooling pipeline, a hot water cut-off valve is installed on the hot water supply pipeline, and the cooling water cut-off valve and the hot water cut-off valve are respectively interlocked with the temperature average value signal of the multi-point temperature detector; The inlet of the emergency absorption treatment unit is connected to the first-stage chlorine buffer tank and the second-stage chlorine buffer tank respectively through a chlorine emergency pipeline, and two emergency safety valves for controlling the first-stage chlorine buffer tank and the second-stage chlorine buffer tank respectively are installed on the chlorine emergency pipeline; A liquid chlorine shut-off valve is installed on the liquid chlorine pipeline, and the liquid chlorine shut-off valve is signal-interlocked with the liquid chlorine pressure sensor; Two chlorine gas cut-off valves are installed on the chlorine gas pipeline, and the two chlorine gas cut-off valves respectively control the switches of the chlorine gas outlets of the first-stage chlorine gas buffer tank and the second-stage chlorine gas buffer tank, and the chlorine gas cut-off valves are interlocked with the corresponding buffer tank pressure sensor signals.

4. The automatic control device according to claim 3, characterized in that: The liquid chlorine pressure sensor, the multi-point temperature detector and the two buffer tank pressure sensors are also respectively and simultaneously signal-interlocked with the liquid chlorine shut-off valve, the cooling water shut-off valve, the hot water shut-off valve and the two chlorine gas shut-off valves.

5. The automatic control device according to claim 4, characterized in that: It also includes an environmental chlorine gas monitoring unit, which includes a plurality of chlorine gas monitoring probes installed around the liquid chlorine vaporization automatic control device. The environmental chlorine gas monitoring unit is respectively connected to the liquid chlorine cut-off valve, the cooling water cut-off valve, the hot water cut-off valve and the two chlorine gas cut-off valves by signals, and is connected to a chlorine gas leakage alarm component.

6. The automatic control device according to any one of claims 1 to 5, characterized in that: The end of the chlorine gas pipeline is connected with a chlorine gas cylinder, and a gas cylinder pressure sensor is arranged on the chlorine gas cylinder. The gas cylinder pressure sensor is interlocked with the signal of the liquid chlorine flow post-regulating valve.

7. The automatic control device according to claim 6, characterized in that: It also includes a sewage tank and a sewage pipe connected to the inlet of the sewage tank, and the sewage pipe is respectively connected to the hot water outlet, the sewage outlet of the first-stage chlorine buffer tank and the sewage outlet of the second-stage chlorine buffer tank.

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