Chlorine tail gas recovery device in bromine blowing production process

Abstract

The utility model discloses a chlorine tail gas recovery device in a bromine blowing production process, which belongs to the technical field of tail gas recovery and comprises a chlorine vaporizer, a first chlorine steel cylinder and a second chlorine steel cylinder. The output end of the first chlorine steel cylinder and the output end of the second chlorine steel cylinder are communicated with the chlorine vaporizer through a first copper pipe and a second copper pipe respectively, a first valve and a second valve are installed on the first copper pipe, and a third valve and a fourth valve are installed on the second copper pipe. A third copper pipe is connected between the first copper pipe and the second copper pipe, a fifth valve and a sixth valve are symmetrically installed on the third copper pipe, a fourth copper pipe is connected to the third copper pipe, a seventh valve is installed on the fourth copper pipe, an alkali liquor spraying device is installed at one end of the fourth copper pipe, an induced draft fan is installed in the fourth copper pipe, and a third valve is installed on the third copper pipe. The device has the multiple beneficial effects of efficient recovery, environment friendliness, simplicity and convenience in operation, safety, reliability and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to tail gas recovery technical field, and more particularly to a kind of chlorine tail gas recovery device in bromine blowing production process. BACKGROUND

[0002] Currently, bromine is a kind of red-brown liquid, molecular formula Br2, relative density 3.119 (20℃), boiling point 58.78℃, volatile, with strong corrosive, slightly soluble in water, easily soluble in ethanol, diethyl ether, chloroform, carbon tetrachloride, kerosene and carbon disulfide and many other organic solvents, also soluble in hydrochloric acid, hydrobromic acid and bromide compound solution. Bromine is an important chemical raw material, in flame retardant, extinguishing agent, refrigerant, photosensitive material, medicine, pesticide, oil field and other industries have wide application. Because rock salt mine and underground brine contain bromine amount decreases year by year, resources are increasingly exhausted, domestic from 1966 began to test and study seawater extraction of bromine, the plant uses air blowing method to carry out seawater extraction of bromine, air blowing method is commonly used for industrial scale seawater extraction of bromine method, the process used in the plant is in pre-acidified concentrated seawater, bromide ion is replaced by chlorine to become elemental bromine, then air and water vapor are passed in, bromine is blown into absorption tower, bromine vapor and absorbent sulfur dioxide react to convert into hydrobromic acid to achieve the purpose of enrichment, that is, to obtain enriched bromine. Then, through distillation column, industrial bromine is obtained by oxidizing it with chlorine.

[0003] Chlorine is generally compressed and stored in steel cylinder when used, but when replacing chlorine steel cylinder, chlorine in copper pipe and pipeline is not used up, which leads to chlorine escaping during replacement, causing environmental pollution and safety hazards CONTENT OF UTILITY MODEL

[0004] In order to make up for the above shortcomings, the utility model provides a kind of chlorine tail gas recovery device in bromine blowing production process, to improve the chlorine steel cylinder when replacing chlorine, chlorine in copper pipe and pipeline is not used up, which leads to chlorine escaping during replacement, causing environmental pollution and safety hazards.

[0005] The utility model is realized as follows: a kind of chlorine tail gas recovery device in bromine blowing production process, including chlorine vaporizer, first chlorine steel cylinder and second chlorine steel cylinder, the output of the first chlorine steel cylinder and the second chlorine steel cylinder is communicated with the chlorine vaporizer by first copper pipe and second copper pipe respectively, first valve and second valve are installed on the first copper pipe, third valve and fourth valve are installed on the second copper pipe, third copper pipe is connected between the first copper pipe and the second copper pipe, fifth valve and sixth valve are symmetrically installed on the third copper pipe, fourth copper pipe is connected on the third copper pipe, seventh valve is installed on the fourth copper pipe, alkali liquor spraying device is installed on one end of the fourth copper pipe, draught fan is installed in the fourth copper pipe.

[0006] In the preferred technical scheme of the utility model, the outlet end of the first chlorine steel cylinder and the second chlorine steel cylinder is respectively installed with a steel cylinder valve, and the seventh valve is a normally open valve.

[0007] In the preferred technical scheme of the utility model, the lye spraying device comprises a lye tank and a spraying head, one end of the fourth copper pipe is fixedly connected with the lye tank, the lye tank is internally provided with the spraying head, and one side of the lye tank is provided with a recovery pipeline; after chlorine tail gas enters the lye tank, the chlorine tail gas is fully contacted and reacted with lye sprayed by the spraying head to generate harmless salt substances, and the chlorine tail gas is discharged through the recovery pipeline, thereby realizing harmless treatment of the chlorine.

[0008] In the preferred technical scheme of the utility model, the control system is installed in the induced draft fan, so that negative pressure of the pipeline can be rapidly formed when the chlorine steel cylinder is replaced, and damage of equipment or leakage of chlorine caused by excessively large negative pressure can be avoided.

[0009] In the preferred technical scheme of the utility model, the control system comprises a pressure sensor, a temperature sensor and an emergency cut-off switch, the emergency cut-off switch, the pressure sensor and the temperature sensor are fixedly installed in the induced draft fan, the emergency cut-off switch is electrically connected with the pressure sensor and the temperature sensor, and the emergency cut-off switch is electrically connected with the fifth valve and the sixth valve, so that chlorine supply can be rapidly cut off under abnormal conditions, and production safety can be ensured.

[0010] In the preferred technical scheme of the utility model, the number of chlorine steel cylinders can be increased, the valve configuration can be adjusted, or the design of the lye spraying device can be optimized according to actual production requirements, so that production requirements of different scales can be met.

[0011] In the preferred technical scheme of the utility model, the fifth valve and the sixth valve are symmetrically arranged on the two sides of the connection position of the third copper pipe and the fourth copper pipe.

[0012] The utility model has the advantages of:

[0013] Efficient recovery: the utility model utilizes the induced draft fan and negative pressure technology to efficiently recover residual chlorine tail gas when the chlorine steel cylinder is replaced, and avoids escape and waste of the chlorine.

[0014] Environment-friendly: the lye spraying device is used to perform harmless treatment on the chlorine tail gas to generate harmless salt substances, so that environmental pollution is reduced, and the production concept of green environmental protection is met.

[0015] Simple operation: the device structure is compact, and the valve configuration is reasonable, so that the operation process is simple and fast, and the operation difficulty and labor cost are reduced.

[0016] Safe and reliable: The device is provided with a control system and an emergency shut-off switch, which can monitor the negative pressure state and temperature in real time and quickly shut off the chlorine supply in abnormal conditions, ensuring production safety.

[0017] In summary, the device has multiple benefits such as efficient recovery, environmental friendliness, easy operation, and safety and reliability, which is of great significance to improving the environmental level and production efficiency of seawater bromine extraction. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0019] Figure 1 is a structural schematic diagram of a chlorine tail gas recovery device in a bromine blowing production process provided by the embodiments of the present application.

[0020] In the figure: 101, first valve; 102, second valve; 103, third valve; 104, fourth valve; 105, fifth valve; 106, sixth valve; 107, seventh valve; 110, chlorine vaporizer; 111, first copper pipe; 112, second copper pipe; 113, third copper pipe; 114, fourth copper pipe; 120, first chlorine steel cylinder; 130, second chlorine steel cylinder; 140, lye tank; 141, induced draft fan. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0022] Please refer to Figure 1The utility model provides technical scheme: a chlorine tail gas recovery device in blowing bromine production process, including chlorine vaporizer 110, first chlorine steel bottle 120 and second chlorine steel bottle 130, and the output of first chlorine steel bottle 120 and second chlorine steel bottle 130 is communicated with chlorine vaporizer 110 through first copper pipe 111 and second copper pipe 112 respectively, and first copper pipe 111 is equipped with first valve 101 and second valve 102, and second copper pipe 112 is equipped with third valve 103 and fourth valve 104, and third copper pipe 113 is connected between first copper pipe 111 and second copper pipe 112, and fifth valve 105 and sixth valve 106 are symmetrically installed on third copper pipe 113, and fourth copper pipe 114 is connected on third copper pipe 113, and seventh valve 107 is installed on fourth copper pipe 114, and alkali liquor spraying device is installed on one end of fourth copper pipe 114, and induced draft fan 141 is installed in fourth copper pipe 114.

[0023] In some specific embodiments, the outlet ends of the first chlorine steel bottle 120 and the second chlorine steel bottle 130 are respectively equipped with steel bottle valves, and the seventh valve 107 is a normally open valve. By installing the steel bottle valves, the outflow of chlorine can be accurately controlled, enhancing the safety and flexibility of operation. At the same time, the normally open design of the seventh valve 107 ensures the continuous and stable operation of the system, avoiding the risk of chlorine leakage due to valve misoperation.

[0024] In some specific embodiments, the alkali liquor spraying device includes an alkali liquor tank 140 and a spray head. The one end of the fourth copper pipe 114 is fixedly connected to the alkali liquor tank 140, and the spray head is installed inside the alkali liquor tank 140. A recovery pipeline is installed on one side of the alkali liquor tank 140. After the chlorine tail gas enters the alkali liquor tank 140, it fully contacts and reacts with the alkali liquor sprayed by the spray head, generating harmless salt substances and being discharged through the recovery pipeline, achieving harmless treatment of chlorine.

[0025] In some specific embodiments, a control system is installed in the induced draft fan 141 to ensure that a negative pressure can be quickly formed in the pipeline when the chlorine steel bottle is replaced, while avoiding equipment damage or chlorine leakage caused by excessive negative pressure. The control system can monitor the negative pressure state in real time and automatically adjust the working parameters of the induced draft fan 141. The real-time monitoring and automatic adjustment functions further improve the stability and reliability of the system, further avoiding the risk of chlorine leakage caused by improper operation or equipment failure. The control system includes a pressure sensor, a temperature sensor, and an emergency shutdown switch. The emergency shutdown switch, the pressure sensor, and the temperature sensor are fixedly installed in the induced draft fan 141. The emergency shutdown switch is electrically connected to the pressure sensor and the temperature sensor. The emergency shutdown switch is electrically connected to the fifth valve 105 and the sixth valve 106, ensuring that the chlorine supply can be quickly cut off in abnormal conditions to ensure production safety.

[0026] In some specific embodiments, the number of chlorine gas cylinders, valve configuration, or alkaline liquid spraying device design can be adjusted or optimized according to actual production needs to meet different scale production requirements. This design makes the device highly flexible and scalable, allowing customization and optimization according to actual production needs. This not only improves the efficiency of the device, but also meets the requirements of different scales and production processes, reducing the operating costs and environmental pressures of enterprises.

[0027] In some specific embodiments, the fifth valve 105 and the sixth valve 106 are symmetrically arranged on both sides of the connection between the third copper pipe 113 and the fourth copper pipe 114. The symmetrically arranged fifth valve 105 and sixth valve 106 not only improve the structural symmetry of the device, but also make the system more stable and reliable during operation. This design helps to reduce the risk of increased fluid resistance or leakage caused by improper valve position, thereby improving the efficiency and safety of the entire device.

[0028] Working principle: It mainly relies on the negative pressure effect generated by the induced draft fan 141 and the precise control of the valves. In the device, chlorine gas cylinders (such as the first chlorine gas cylinder 120 and the second chlorine gas cylinder 130) are connected to the chlorine gas vaporizer 110 through copper pipes (the first copper pipe 111 and the second copper pipe 112). Control valves (such as the first valve 101 to the fourth valve 104) are installed on the copper pipes to open or close the chlorine gas flow path as needed.

[0029] When it is necessary to replace the chlorine gas cylinder, for example, switching from the first chlorine gas cylinder 120 to the second chlorine gas cylinder 130, the operator will first close the cylinder valve of the first chlorine gas cylinder 120 and the first valve 101 and the second valve 102, while opening the cylinder valve of the second chlorine gas cylinder 130 and the third valve 103 and the fourth valve 104. The seventh valve 107 remains open, the induced draft fan 141 starts working, and negative pressure is generated through the fourth copper pipe 114 (with the induced draft fan 141 installed inside) and the connected third copper pipe 113. Then, the fifth valve 105 is slowly opened, allowing the negative pressure in the pipeline to completely absorb the residual chlorine gas in the first copper pipe 111 and direct it into the alkaline liquid spraying device. The chlorine tail gas is fully contacted with the alkaline liquid sprayed by the spray head in the alkaline liquid tank 140, generating harmless salt substances, which are finally discharged through the recovery pipeline.

[0030] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A chlorine tail gas recovery device for a bromine blowing production process, characterized in that, The device includes a chlorine vaporizer, a first chlorine cylinder, and a second chlorine cylinder. The output ends of the first and second chlorine cylinders are connected to the chlorine vaporizer via a first copper pipe and a second copper pipe, respectively. A first valve and a second valve are installed on the first copper pipe, and a third valve and a fourth valve are installed on the second copper pipe. A third copper pipe connects the first and second copper pipes. A fifth valve and a sixth valve are symmetrically installed on the third copper pipe. A fourth copper pipe is connected to the third copper pipe, and a seventh valve is installed on the fourth copper pipe. An alkaline spray device is installed at one end of the fourth copper pipe, and an induced draft fan is installed inside the fourth copper pipe.

2. The chlorine tail gas recovery device for bromine blowing production process according to claim 1, characterized in that, The first chlorine gas cylinder and the second chlorine gas cylinder are respectively equipped with cylinder valves at their outlet ends, and the seventh valve is a normally open valve.

3. The chlorine tail gas recovery device for bromine blowing production process according to claim 1, characterized in that, The alkaline spraying device includes an alkaline tank and a spray head. One end of the fourth copper pipe is fixedly connected to the alkaline tank. The spray head is installed inside the alkaline tank. A recovery pipe is installed on one side of the alkaline tank.

4. A chlorine tail gas recovery device for a bromine blowing production process according to claim 1, characterized in that, The induced draft fan is equipped with a control system.

5. A chlorine tail gas recovery device for a bromine blowing production process according to claim 4, characterized in that, The control system includes a pressure sensor, a temperature sensor, and an emergency shut-off switch. The emergency shut-off switch, the pressure sensor, and the temperature sensor are fixedly installed inside the induced draft fan. The emergency shut-off switch is electrically connected to the pressure sensor and the temperature sensor, and is also electrically connected to the fifth valve and the sixth valve.

6. A chlorine tail gas recovery device for a bromine blowing production process according to claim 1, characterized in that, The fifth valve and the sixth valve are symmetrically arranged on both sides of the connection between the third copper pipe and the fourth copper pipe.

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