A recovery device for carbon disulfide tail gas in chemical production

Abstract

A kind of recovery device of carbon disulfide tail gas in chemical production, belong to carbon disulfide tail gas processing field, including tail gas storage tank, the tail gas storage tank with the import of first condenser communication, the outlet of first condenser with the upper portion of gas-liquid separator communication, the bottom of gas-liquid separator with the top of carbon disulfide separation tank communication, the bottom of carbon disulfide separation tank with the carbon disulfide raw material tank of tank area communication, the top of carbon disulfide separation tank with water tank top communication, the upper portion of gas-liquid separator with resin adsorption column bottom communication.The utility model discloses before design first condenser condensation, gas-liquid separator separation process, recovers most carbon disulfide gas in tail gas, and the carbon disulfide gas that cannot be recovered after condensation enters resin adsorption column again and is adsorbed and desorbed, reduces the consumption of resin in resin adsorption column, and the resin needed to supplement is less every year, and the operating cost is lower.

Description

Technical Field

[0001] This utility model belongs to the field of carbon disulfide tail gas treatment, specifically a carbon disulfide tail gas recovery device in chemical production. Background Technology

[0002] Carbon disulfide, as an important chemical raw material, is widely used in the manufacture of viscose fiber, cellophane, carbon tetrachloride, pesticides, and rubber additives. However, these production processes often involve the emission of large amounts of exhaust gases containing carbon disulfide. These exhaust gases not only cause serious environmental pollution but may also lead to resource waste. Traditional treatment methods typically involve direct combustion or high-altitude emission, but these methods are not only inefficient but also generate secondary pollution, failing to meet modern environmental protection requirements. Utility Model Content

[0003] This invention provides a device for recovering carbon disulfide tail gas in chemical production, in order to overcome the deficiencies in the prior art.

[0004] This utility model is achieved through the following technical solution:

[0005] A device for recovering carbon disulfide tail gas in chemical production includes a tail gas storage tank, which is connected to the inlet of a first condenser, the outlet of the first condenser is connected to the upper part of a gas-liquid separator, the bottom of the gas-liquid separator is connected to the top of a carbon disulfide separation tank, the bottom of the carbon disulfide separation tank is connected to a carbon disulfide raw material tank in the tank area, the top of the carbon disulfide separation tank is connected to the top of a water tank, and the upper part of the gas-liquid separator is connected to the bottom of a resin adsorption column.

[0006] As described above, in a chemical production carbon disulfide tail gas recovery device, a flame arrestor filter and an induced draft fan are installed on the connecting pipeline between the tail gas storage tank and the first condenser.

[0007] As described above, in a chemical production process, a carbon disulfide tail gas recovery device is provided, wherein the resin adsorption column comprises at least two columns.

[0008] As described above, in a chemical production process, a carbon disulfide tail gas recovery device is provided, wherein the top of the resin adsorption column is connected to a steam pipe, a dry screw vacuum pump is installed on the connecting pipe between the gas-liquid separator and the resin adsorption column, the bottom of the resin adsorption column is connected to the inlet of a second condenser, and the outlet of the second condenser is connected to the top of the gas-liquid separator.

[0009] As described above, in a chemical production process, a carbon disulfide tail gas recovery device is described, wherein the top of the resin adsorption column is connected to a nitrogen pipe.

[0010] As described above, in a chemical production carbon disulfide tail gas recovery device, the bottom of the water tank is connected to the top of the resin adsorption column.

[0011] As described above, in a chemical production carbon disulfide tail gas recovery device, a cooling pump is installed on the connecting pipeline between the water tank and the resin adsorption column.

[0012] As described above, in a chemical production process, a carbon disulfide tail gas recovery device is described, wherein the top of the tail gas storage tank is connected to the top of the resin adsorption column.

[0013] As described above, in a chemical production carbon disulfide tail gas recovery device, the chilled water inlet of the first condenser is connected to the chilled water circulation system, the chilled water outlet of the first condenser is connected to the chilled water inlet of the second condenser, and the chilled water outlet of the second condenser is connected to the chilled water circulation system.

[0014] As described above, in a chemical production process, a carbon disulfide tail gas recovery device is provided, wherein the bottom of the tail gas storage tank is connected to the top of the carbon disulfide separation tank.

[0015] The advantages of this utility model are:

[0016] This invention achieves the recovery and utilization of carbon disulfide tail gas through adsorption and desorption using a resin adsorption column, with a recovery rate of over 90%.

[0017] This invention incorporates a first condenser and a gas-liquid separator before the resin adsorption column, which recover most of the carbon disulfide gas in the exhaust gas. The gas that cannot be recovered after condensation is then re-entered into the resin adsorption column for adsorption and desorption recovery, reducing the amount of resin consumed in the resin adsorption column. The amount of resin that needs to be replenished each year is small, resulting in lower operating costs.

[0018] This invention allows the vapor from the desorption and analysis of a resin adsorption column to be recovered to a water tank via a second condenser. The cooling water can be used to maintain the water tank level, cool the resin, and also be used for landscaping.

[0019] In this invention, if the gas detected at the emission outlet fails to meet the standards, the gas can be switched to a different valve and re-enter the recovery system for processing, thus ensuring that the carbon disulfide gas in the exhaust gas meets national emission standards. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of this utility model.

[0022] Reference numerals in the attached diagram: 1. Exhaust gas storage tank; 2. Flame arrestor filter; 3. Exhaust fan; 4. First condenser; 5. Gas-liquid separator; 6. Carbon disulfide separator; 7. Resin adsorption column; 8. Second condenser; 9. Water tank; 10. Cooling pump; 11. Dry screw vacuum pump. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] A device for recovering carbon disulfide tail gas in chemical production includes a tail gas storage tank 1. A pressure gauge is installed on the top of the tail gas storage tank 1, and a rotor flow meter is installed on the side of the tail gas storage tank 1. The tail gas storage tank 1 is connected to the inlet of a first condenser 4, and the outlet of the first condenser 4 is connected to the upper part of a gas-liquid separator 5. The bottom of the gas-liquid separator 5 is connected to the top of a carbon disulfide separation tank 6, and the bottom of the carbon disulfide separation tank 6 is connected to a carbon disulfide raw material tank in the tank area. The top of the carbon disulfide separation tank 6 is connected to the top of a water tank 9, and the upper part of the gas-liquid separator 5 is connected to the bottom of a resin adsorption column 7. When this utility model is in use, the exhaust gas is cooled and liquefied by the first condenser 4 and then separated into gas and liquid in the gas-liquid separator 5. The liquid carbon disulfide at the bottom enters the carbon disulfide separation tank 6, and the unliquefied gas enters the resin adsorption column 7 for adsorption before being discharged. The liquid at the bottom of the carbon disulfide separation tank 6 is recovered back to the carbon disulfide raw material tank in the tank area by a shielded pump, and a small amount of liquid at the top is sent to the water tank 9, thereby realizing convenient recovery of carbon disulfide.

[0025] Specifically, in this embodiment, a flame arrestor filter 2, an induced draft fan 3, a pressure gauge, and a metal rotor flow meter are installed on the connecting pipeline between the exhaust gas storage tank 1 and the first condenser 4. In this utility model, the flame arrestor filter 2 is used to filter impurities in the exhaust gas, the induced draft fan 3 provides power for the movement of the exhaust gas, and the pressure gauge and metal rotor flow meter are used to control and monitor the exhaust gas flow rate to prevent the exhaust gas flow rate entering the first condenser 4 from being too large and exceeding the maximum processing capacity of the first condenser 4.

[0026] Specifically, in this embodiment, there are at least two resin adsorption columns 7. By setting two or more resin adsorption columns 7, adsorption and desorption regeneration can be carried out simultaneously. After the resin column is saturated with adsorption, steam is introduced to achieve desorption and regeneration.

[0027] More specifically, in this embodiment, the top of the resin adsorption column 7 is connected to a steam pipe, a dry screw vacuum pump 11 is installed on the connecting pipe between the gas-liquid separator 5 and the resin adsorption column 7, the bottom of the resin adsorption column 7 is connected to the inlet of the second condenser 8, and the outlet of the second condenser 8 is connected to the top of the gas-liquid separator 5. In this invention, the resin adsorption column 7 after adsorption is used is introduced through a steam pipe for desorption and regeneration, and the dry screw vacuum pump 11 is used to send the gas in the gas-liquid separator 5 into the resin adsorption column 7. At the same time, after the resin adsorption column 7 is desorbed and regenerated by steam, the steam containing carbon disulfide is sent to the second condenser 8 and then undergoes gas-liquid separation again in the gas-liquid separator 5, thereby improving the carbon disulfide recovery efficiency and preventing it from being emitted into the air and causing environmental pollution.

[0028] More specifically, in this embodiment, the top of the resin adsorption column 7 is connected to a nitrogen pipe. After the resin adsorption column 7 is desorbed and regenerated, nitrogen is introduced for 5-10 seconds to purge and remove the air inside.

[0029] More specifically, in this embodiment, the bottom of the water tank 9 is connected to the top of the resin adsorption column 7. In this invention, the water in the water tank 9 can be used as cooling water for the resin adsorption column 7 after steam desorption and regeneration, thereby achieving full utilization of resources.

[0030] Furthermore, in this embodiment, a cooling pump 10 is installed on the connecting pipe between the water tank 9 and the resin adsorption column 7. In this invention, the cooling pump 10 drives the water in the water tank 9 into the resin adsorption column 7 for cooling.

[0031] Furthermore, in this embodiment, the top of the exhaust gas storage tank 1 is connected to the top of the resin adsorption column 7.

[0032] Furthermore, in this embodiment, the chilled water inlet of the first condenser 4 is connected to the chilled water circulation system, the chilled water outlet of the first condenser 4 is connected to the chilled water inlet of the second condenser 8, the chilled water outlet of the second condenser 8 is connected to the chilled water circulation system, the chilled water inlet temperature of the first condenser 4 is -5℃, and ball valves are installed to control the corresponding pipes of the chilled water inlet and outlet of the first condenser 4 and the second condenser 8.

[0033] Furthermore, in this embodiment, the bottom of the exhaust gas storage tank 1 is connected to the top of the carbon disulfide separator 6, and an exhaust valve is installed on the connecting pipeline between the exhaust gas storage tank 1 and the carbon disulfide separator 6. The exhaust valve is controlled by a dual valve.

[0034] Preferably, in this embodiment, all electrical components of the equipment are made of explosion-proof materials with an explosion-proof rating of CT4.

[0035] Preferably, the gas-liquid separator 5 described in this embodiment is equipped with a liquid level controller and an electric contact pressure gauge, and the discharge pipe is connected to a pneumatic ball valve. The opening and closing time of the discharge pneumatic valve is controlled by a PLC module.

[0036] Preferably, the water tank 9 described in this embodiment is insulated with a jacket and equipped with an insulated pump to prevent the water tank 9 from freezing due to low temperature.

[0037] Preferably, the exhaust gas outlet of the resin adsorption column 7 described in this embodiment is designed with an angle valve or a double valve to achieve a switching function, allowing unqualified exhaust gas to re-enter the system for treatment.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A device for recovering carbon disulfide tail gas in chemical production, characterized in that: The system includes a tail gas storage tank (1), which is connected to the inlet of a first condenser (4), and the outlet of the first condenser (4) is connected to the upper part of a gas-liquid separator (5). The bottom of the gas-liquid separator (5) is connected to the top of a carbon disulfide separation tank (6), the bottom of the carbon disulfide separation tank (6) is connected to the carbon disulfide raw material tank in the tank area, the top of the carbon disulfide separation tank (6) is connected to the top of a water tank (9), and the upper part of the gas-liquid separator (5) is connected to the bottom of a resin adsorption column (7).

2. The device for recovering carbon disulfide tail gas in chemical production according to claim 1, characterized in that: A flame arrester filter (2) and an induced draft fan (3) are installed on the connecting pipeline between the exhaust gas storage tank (1) and the first condenser (4).

3. The device for recovering carbon disulfide tail gas in chemical production according to claim 1, characterized in that: The resin adsorption column (7) consists of at least two columns.

4. The device for recovering carbon disulfide tail gas in chemical production according to claim 1, characterized in that: The top of the resin adsorption column (7) is connected to the steam pipe, and a dry screw vacuum pump (11) is installed on the connecting pipe between the gas-liquid separator (5) and the resin adsorption column (7). The bottom of the resin adsorption column (7) is connected to the inlet of the second condenser (8), and the outlet of the second condenser (8) is connected to the top of the gas-liquid separator (5).

5. The device for recovering carbon disulfide tail gas in chemical production according to claim 1, characterized in that: The top of the resin adsorption column (7) is connected to a nitrogen gas pipe.

6. The device for recovering carbon disulfide tail gas in chemical production according to claim 1, characterized in that: The bottom of the water tank (9) is connected to the top of the resin adsorption column (7).

7. The device for recovering carbon disulfide tail gas in chemical production according to claim 6, characterized in that: A cooling pump (10) is installed on the connecting pipeline between the water tank (9) and the resin adsorption column (7).

8. The device for recovering carbon disulfide tail gas in chemical production according to claim 1, characterized in that: The top of the exhaust gas storage tank (1) is connected to the top of the resin adsorption column (7).

9. The device for recovering carbon disulfide tail gas in chemical production according to claim 1, characterized in that: The chilled water inlet of the first condenser (4) is connected to the chilled water circulation system, the chilled water outlet of the first condenser (4) is connected to the chilled water inlet of the second condenser (8), and the chilled water outlet of the second condenser (8) is connected to the chilled water circulation system.

10. A device for recovering carbon disulfide tail gas in chemical production according to claim 1, characterized in that: The bottom of the tail gas storage tank (1) is connected to the top of the carbon disulfide separator (6).

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