CN217442313U

CN217442313U - Chemical high-calorific-value tail gas and reaction heat automatic recycling process device

Info

Publication number: CN217442313U
Application number: CN202221126850.2U
Authority: CN
Inventors: 孙文杰; 张春法; 刘爱云
Original assignee: Bairun New Materials Shouguang Co ltd
Current assignee: Bairun New Materials Shouguang Co ltd
Priority date: 2022-05-11
Filing date: 2022-05-11
Publication date: 2022-09-16
Anticipated expiration: 2032-05-11

Abstract

The utility model provides an automatic recycle process units of chemical industry high calorific value tail gas and reaction heat mainly relates to the heat recovery field. A chemical high-calorific-value tail gas and reaction heat automatic recycling process device comprises a DCS control system, a circulating water regulating valve, a heat exchanger, a Venturi ejector, a circulating tank, a circulating pump and a valve system, wherein the circulating water regulating valve, the heat exchanger, the Venturi ejector, the circulating tank, the circulating pump and the valve system are sequentially connected through a pipeline; the negative pressure interface connection tail gas pipe of venturi ejector, the circulation tank top sets up blow-down pipe, moisturizing mouth and overflow water pipe, set up pressure transmitter on the pipeline between valve system and the circulating water regulation and control valve, set up temperature transmitter on the circulation tank. The beneficial effects of the utility model reside in that: the utility model discloses can ensure that the high calorific value tail gas and the reaction heat that produce obtain comprehensive utilization in the chemical industry process.

Description

Chemical high-calorific-value tail gas and reaction heat automatic recycling process device

Technical Field

The utility model relates to a heat recovery field specifically is an automatic recycle process units of chemical industry high calorific value tail gas and reaction heat.

Background

In chemical production, a large amount of reaction heat is released along with the reaction of materials, the reaction temperature is generally maintained by adopting heat exchange equipment to cool in the chemical reaction process, circulating water for completing heat exchange returns to a cooling water tower to be cooled, and the heat cannot be recycled. And because the tail gas temperature that produces among the reaction process is also higher generally, and most chemical plant tail gas principal ingredients are vapor, have adopted cooling, condensation mode to gather waste water system to handle now basically, wherein the high calorific value that contains has also not been utilized, has caused certain waste.

SUMMERY OF THE UTILITY MODEL

For solving the not enough of prior art, the utility model provides an automatic recycle process units of high calorific value tail gas of chemical industry and reaction heat ensures that high calorific value tail gas and the reaction heat that produces obtain comprehensive utilization in the chemical industry process.

The utility model discloses a realize above-mentioned purpose, realize through following technical scheme:

a chemical high-calorific-value tail gas and reaction heat automatic recycling process device comprises a DCS control system, a circulating water regulating valve, a heat exchanger, a Venturi ejector, a circulating tank, a circulating pump and a valve system, wherein the circulating water regulating valve, the heat exchanger, the Venturi ejector, the circulating tank, the circulating pump and the valve system are sequentially connected through a pipeline; the negative pressure interface connection tail gas pipe of venturi ejector, the circulation tank top sets up blow-down pipe, moisturizing mouth and overflow water pipe, set up pressure transmitter on the pipeline between valve system and the circulating water regulation and control valve, set up temperature transmitter on the circulation tank, circulating water regulation and control valve, pressure transmitter, temperature transmitter and circulating pump all are connected with DCS control system electricity.

The valve system comprises a check valve and a manual control valve which are connected in series on a pipeline.

And a distributor is arranged in the circulating tank and is connected with a water inlet pipeline of the circulating tank.

The tail gas introduced into the tail gas pipe is mixed gas mainly comprising water vapor.

And a tail gas regulating valve is arranged on the tail gas pipe.

The water outlet of the pipeline of the valve system passes through a hot user and then is connected with a circulating water regulating valve to complete a circulating loop.

Contrast prior art, the beneficial effects of the utility model are that:

the utility model discloses a DCS control system adjusts the heat recovery process, can be automatic and manual control, and circulating water temperature and pressure automated inspection upload, utilize the pressure and the flow of regulation and control valve automatic control circulating water. The pump equipment can be frequency-variable and speed-adjustable, and the temperature and the pressure of the whole system are kept constant. Through the suction effect of the Venturi ejector, the high-calorific-value tail gas can be effectively absorbed and is fully mixed with the circulating water after heat exchange, so that the heat value in the circulating system is improved, and the reaction heat recovery efficiency in the reaction process is improved. The whole system of the circulating system is controlled and operated by DCS software, so that the safety and reliability of the process are ensured.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

The reference numbers shown in the figures: 1. a circulating water regulating valve; 2. a heat exchanger; 3. a circulation tank; 4. a distributor; 5. a tail gas regulating valve; 6. a venturi ejector; 7. a circulation pump; 8. a check valve; 9. a manual control valve; 10. an emptying pipe; 11. a pressure transmitter; 12. and a temperature transmitter.

Detailed Description

The invention is further described with reference to the accompanying drawings and the specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and these equivalents also fall within the scope defined in the present application.

As shown in figure 1, a chemical industry high calorific value tail gas and automatic recycle process units of reaction heat, regulate and control valve 1, heat exchanger 2, venturi ejector 6, circulation groove 3, circulating pump 7 and valve system including DCS control system and the circulating water that loops through the pipe connection, valve system is connected through pipeline and circulating water regulation and control valve 1 and is formed closed circuit, and wherein valve system's outlet pipe connects hot user, will synthesize the heat in the hot return water and utilize, and the return water after the temperature reduction passes through circulating water regulation and control valve 1 and gets into heat exchanger 2 again and reation kettle's cooling water pipeline carries out the heat exchange to obtain the reaction heat.

Wherein venturi ejector 6's negative pressure interface connection tail gas pipe, through the negative pressure that the difference of the both ends velocity of flow caused around, venturi ejector 6 absorbs the high calorific value tail gas that lets in the tail gas pipe to accomplish the mixed transport of high calorific value tail gas and reaction heat exchange water. The tail gas introduced into the tail gas pipe is mixed gas mainly comprising water vapor, so that effective mixing with reaction heat exchange water can be guaranteed, and heat in the tail gas with high heat value is utilized. Specifically, the tail gas pipe is provided with a tail gas regulating valve 5, and the tail gas regulating valve 5 is used for regulating the flow of tail gas.

The top of the circulation tank 3 is provided with an emptying pipe 10, a water replenishing port and an overflow water pipe, and the emptying pipe 10 has the function of discharging gas in the circulation tank so as to adjust the pressure in the circulation tank 3. The overflow pipe can lead out the redundant mixed water and convey the mixed water to users or waste water.

Set up pressure transmitter 11 on the pipeline between valve system and circulating water regulation and control valve 1, set up temperature transmitter 12 on the circulation groove 3, circulating water regulation and control valve 1, pressure transmitter 11, temperature transmitter 12 and circulating pump 7 all are connected with the DCS control system electricity. The pressure transmitter 11 has the function of uploading the pressure change of the circulating water to the DCS control system, the DCS control system issues an instruction to the circulating pump 7 according to a set program, and the rotating speed of the pump is adjusted by using the frequency converter, so that the pressure of the circulating water is ensured to meet the technological requirements of the system; the temperature transmitter 12 has a function of automatically detecting and transmitting the temperature of the circulating water to the DCS control system, and the DCS control system controls the circulating water control valve 1 and the tail gas control valve 5 according to a set program, thereby adjusting and processing the flow rate of the circulating water and the flow rate of the high-calorific-value tail gas.

Specifically, the valve system comprises a check valve 8 and a manual control valve 9 which are connected in series on a pipeline, and the check valve 8 is used for preventing circulating water from flowing backwards to damage equipment when a pump is stopped; the function of the manual control valve 9 is to control the start and stop of the pump and to manually regulate the circulating water flow.

More specifically, a distributor 4 is arranged in the circulation tank 3, and the distributor 4 is connected with a water inlet pipeline of the circulation tank 3. The circulating tank 3 is used for storing circulating water, and absorbed water and heat are collected and mixed at the circulating tank; the distributor 4 is used for uniformly distributing heat and ensuring uniform water temperature in the circulating tank so as to meet the requirement that subsequent users obtain uniform-temperature heat utilization.

The system can mix and utilize the reaction heat and the heat in the reaction tail gas, fully recover the reaction heat and achieve the effects of energy conservation and emission reduction.

Finally, the description is as follows: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications, substitutions, and improvements can be made without departing from the scope of the invention.

Claims

1. The utility model provides an automatic recycle process units of chemical industry high calorific value tail gas and reaction heat which characterized in that: the device comprises a DCS control system, a circulating water regulating valve (1), a heat exchanger (2), a Venturi ejector (6), a circulating tank (3), a circulating pump (7) and a valve system which are connected in sequence through pipelines, wherein the valve system is connected with the circulating water regulating valve (1) through a pipeline to form a closed loop; the negative pressure interface connection tail gas pipe of venturi ejector (6), circulation groove (3) top sets up blow-down pipe (10), moisturizing mouth and overflow pipe, set up pressure transmitter (11) on the pipeline between valve system and circulating water regulation and control valve (1), set up temperature transmitter (12) on circulation groove (3), circulating water regulation and control valve (1), pressure transmitter (11), temperature transmitter (12) and circulating pump (7) all are connected with the DCS control system electricity.

2. The automatic recycling process unit of the chemical high-calorific-value tail gas and the reaction heat according to claim 1, characterized in that: the valve system comprises a check valve (8) and a manual control valve (9) which are connected in series on a pipeline.

3. The automatic recycling process unit of the chemical high-calorific-value tail gas and the reaction heat according to claim 1, characterized in that: and a distributor (4) is arranged in the circulating tank (3), and the distributor (4) is connected with a water inlet pipeline of the circulating tank (3).

4. The automatic recycling process unit of the chemical high-calorific-value tail gas and the reaction heat according to claim 1, characterized in that: the tail gas introduced into the tail gas pipe is mixed gas mainly comprising water vapor.

5. The automatic recycling process unit of the chemical high-calorific-value tail gas and the reaction heat according to claim 1, characterized in that: and a tail gas regulating valve (5) is arranged on the tail gas pipe.

6. The chemical high-calorific-value tail gas and reaction heat automatic recycling process unit according to claim 1, is characterized in that: the water outlet of the pipeline of the valve system passes through a hot user and then is connected with a circulating water regulating valve (1) to complete a circulating loop.