Absorption and adsorption ultra-clean discharging device

Abstract

The utility model relates to an absorption and adsorption ultra-clean discharge device, which mainly comprises an absorption tower, a condenser, a condensate tank, an adsorption tank combination, a program control valve and the like, and is characterized in that a closed loop is formed among the absorption tower, the condenser, the condensate tank and the adsorption tank combination, and through the adsorption tank combination made of different adsorption materials, the absorption tower is connected with the condenser. The activated carbon, the molecular sieve, the silica gel and the activated carbon fiber are contained, the program control valve is automatically adjusted, efficient absorption and adsorption are achieved, and the device is mainly used for industrial tail gas treatment and has the advantages of being compact in structure, low in energy consumption and low in replacement frequency.

Description

Technical Field

[0001] The utility model relates to an absorption and adsorption ultra-clean discharge device. Background Art

[0002] Absorption and adsorption technology is a mature VOCs oil and gas treatment technology. However, with the continuous improvement of environmental protection requirements, the absorption and adsorption technology of ultra-clean emissions has stricter control over the absorption and adsorption process and more refined selection of adsorbents. The main principle is to use diesel absorption to reduce the concentration of VOCs in oil and gas, and use the condenser to reduce the oil and gas temperature to improve the work efficiency of the subsequent adsorption section. In traditional absorption and adsorption ultra-clean emission devices, pollutants in industrial exhaust are usually removed through absorption towers, condensers and other equipment.

[0003] However, this method has certain shortcomings when treating high-concentration volatile organic compounds (VOCs), such as low absorption efficiency, high energy consumption, and frequent adsorbent replacement. Therefore, there is a need for an ultra-clean emission device that utilizes purer and more energy-saving absorption and adsorption. Utility Model Content

[0004] The purpose of this utility model is to solve the deficiencies of the above-mentioned prior art and provide an absorption and adsorption ultra-clean discharge device. By optimizing the absorption tower structure, adopting a combination of adsorption tanks with different adsorption materials, and automatically adjusting the program-controlled valve, the adsorption efficiency is effectively improved, the energy consumption is reduced, and the frequency of adsorbent replacement is reduced. The following is a specific solution:

[0005] An absorption and adsorption ultra-clean emission device, comprising an absorption tower, a condenser, a condensate tank, an adsorption tank assembly and a program-controlled valve, wherein the outlet of the upper portion of the absorption tower and the inlet of the condenser are connected to each other, the outlet of the condenser is connected to the inlet of the adsorption tank assembly, the outlet of the condenser is also connected to the inlet of the condensate tank, the outlet of the condensate tank is connected to the inlet of the lower portion of the absorption tower, the outlet of the adsorption tank assembly is connected to the inlet of a first vacuum pump, the outlet of the adsorption tank assembly is connected to the inlet of a second vacuum pump, the inlet of the adsorption tank assembly is connected to a nitrogen purge pipe, the outlet of the adsorption tank assembly is connected to an exhaust gas emission pipe, the outlets of the first vacuum pump and the second vacuum pump are both connected to the inlet of the lower portion of the absorption tower, and the adsorption tank assembly comprises a first adsorption tank , a second adsorption tank, a third adsorption tank and a fourth adsorption tank, the adsorption material in the first adsorption tank is activated carbon, the adsorption material in the second adsorption tank is molecular sieve, the adsorption material in the third adsorption tank is silica gel, and the adsorption material in the fourth adsorption tank is activated carbon fiber. The condenser, the first vacuum pump and the second vacuum pump are all connected to the inlet and outlet of the cooling water pipe. A programmable valve is provided on the pipeline between the outlet of the condenser and the inlet of the adsorption tank combination, a programmable valve is provided on the pipeline between the outlet of the adsorption tank combination and the inlet of the first vacuum pump, a programmable valve is provided on the pipeline between the inlet of the adsorption tank combination and the nitrogen purge pipe, and a programmable valve is provided on the pipeline between the outlet of the adsorption tank combination and the exhaust pipe.

[0006] The diameter of the absorption tower is 1 meter, and the absorption tower has a cylindrical structure, which is conducive to improving the absorption efficiency and reducing the floor space. At the same time, the uniform cylindrical structure helps to evenly distribute the airflow, effectively reducing the escape rate of oil and gas VOCs.

[0007] The condenser has a fin structure, which can significantly increase the heat exchange area and improve the condensation efficiency, thereby reducing energy consumption. In addition, the fin structure is easy to clean and maintain, which helps to maintain the long-term stable operation of the system.

[0008] The first adsorption tank, the second adsorption tank, the third adsorption tank and the fourth adsorption tank in the adsorption tank combination have the same volume, which ensures the uniformity and continuity of the adsorption process, maximizes the adsorption efficiency, and facilitates the interchange and maintenance of the adsorption tanks.

[0009] The cooling medium flowing in the cooling water pipe is water, and the flow rate is 5 cubic meters per hour, which can meet the cooling needs and avoid water waste, and meets the requirements of energy conservation and emission reduction.

[0010] The program-controlled valve can automatically adjust the opening and closing of the pipeline according to a preset program, thereby improving the automation level of the system, reducing the complexity and error probability of manual operation, and ensuring the safety and stability of the system operation.

[0011] The absorption tower is equipped with fillers, demisters and nozzles to improve absorption efficiency; the demister effectively reduces the entrainment of droplets and ensures the cleanliness of tail gas emissions; the design of the nozzle makes the spraying more uniform, which helps to improve the absorption effect.

[0012] Beneficial effects: The absorption tower can use a variety of organic solvents such as diesel and crude oil as adsorbents. The solvent spray density is controlled by the spray volume. Regular fillers are set in the tower to increase the gas-liquid contact area. The gas flow rate in the tower is controlled to be around 3m / s, with lean oil entering and rich oil exiting, which increases the adsorption capacity of the absorbent and ultimately achieves an oil and gas concentration of less than 20g / Nm3 at the outlet.

[0013] The condenser is used to reduce the temperature of the absorbed oil and gas to below 20°C, which can realize the separation of entrained oil and gas, and can also complete the pre-cooling of the oil and gas, reduce the temperature rise load in the subsequent adsorption process, and improve the efficiency of the adsorbent; the nitrogen purge breaks the vacuum and purges the adsorption tank, which can effectively reduce the discharge of three wastes and alleviate the impact on the environment;

[0014] The use of silica gel, resin, activated carbon and activated carbon fiber in different layers and proportions can achieve different adsorption of C2, C3, C4 and C5+ in VOCs, adsorption of large molecules and post-adsorption of small molecules. This step-by-step adsorption method can not only improve the adsorption efficiency, but also effectively avoid mutual interference between adsorption materials.

[0015] Multiple vacuum pumps are used to achieve two-stage vacuum desorption. The first stage vacuum desorption is at 18kPa, and the second stage vacuum desorption is at 9kPa. This allows different molecules to be desorbed in sequence, achieving step control and effectively improving the desorption efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the pipeline principle of an absorption and adsorption ultra-clean discharge device;

[0017] In the figure: 1. absorption tower, 2. condenser, 3. condensate tank, 4. adsorption tank assembly, 5. exhaust pipe, 6. programmable valve, 7. nitrogen purge pipe, 8. first vacuum pump, 9. second vacuum pump, 10. cooling water pipe, 41. first adsorption tank, 42. second adsorption tank, 43. third adsorption tank, 44. fourth adsorption tank. DETAILED DESCRIPTION

[0018] In order to deepen the understanding of the present invention, the present invention will be further described in detail below with reference to embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0019] In this embodiment:

[0020] Please see Figure 1, an absorption and adsorption ultra-clean emission device, comprising an absorption tower 1, a condenser 2, a condensate tank 3, an adsorption tank assembly 4 and a program-controlled valve 6, the outlet of the upper part of the absorption tower 1 and the inlet of the condenser 2 are connected to each other, the outlet of the condenser 2 is connected to the inlet of the adsorption tank assembly 4, the outlet of the condenser 2 is also connected to the inlet of the condensate tank 3, the outlet of the condensate tank 3 is connected to the inlet of the lower part of the absorption tower 1, the outlet of the adsorption tank assembly 4 is connected to the inlet of the first vacuum pump 8, the outlet of the adsorption tank assembly 4 is connected to the inlet of the second vacuum pump 9, the inlet of the adsorption tank assembly 4 is connected to the nitrogen purge pipe 7, the outlet of the adsorption tank assembly 4 is connected to the tail gas emission pipe 5, the outlets of the first vacuum pump 8 and the second vacuum pump 9 are both connected to the inlet of the lower part of the absorption tower 1, the adsorption tank assembly 4 includes a first adsorption tank 41, The second adsorption tank 42, the third adsorption tank 43 and the fourth adsorption tank 44, the adsorption material in the first adsorption tank 41 is activated carbon, the adsorption material in the second adsorption tank 42 is molecular sieve, the adsorption material in the third adsorption tank 43 is silica gel, and the adsorption material in the fourth adsorption tank 44 is activated carbon fiber. The condenser 2, the first vacuum pump 8 and the second vacuum pump 9 are all connected to the inlet and outlet of the cooling water pipe 10. A program-controlled valve 6 is provided on the pipeline between the outlet of the condenser 2 and the inlet of the adsorption tank combination 4, a program-controlled valve 6 is provided on the pipeline between the outlet of the adsorption tank combination 4 and the inlet of the first vacuum pump 8, a program-controlled valve 6 is provided on the pipeline between the inlet of the adsorption tank combination 4 and the nitrogen purge pipe 7, and a program-controlled valve 6 is provided on the pipeline between the outlet of the adsorption tank combination 4 and the exhaust pipe 5.

[0021] The diameter of the absorption tower 1 is 1 meter, the absorption tower 1 is a cylindrical structure, the condenser 2 is a finned structure, the volumes of the first adsorption tank 41, the second adsorption tank 42, the third adsorption tank 43 and the fourth adsorption tank 44 in the adsorption tank assembly 4 are all the same, the cooling medium flowing in the cooling water pipe 10 is water, and the flow rate is 5 cubic meters per hour. The programmable valve 6 can automatically adjust the opening and closing of the pipeline according to a preset program, and the absorption tower 1 is provided with packing, a demister and a nozzle.

[0022] The outlet of the upper part of the absorption tower 1 is connected to the inlet of the condenser 2 through a pipeline to form a gas flow channel. The outlet of the condenser 2 is respectively connected to the inlet of the adsorption tank assembly 4 and the inlet of the condensate tank 3, so that the condensed gas can enter the adsorption tank assembly 4 for further treatment. At the same time, the condensate flows into the condensate tank 3. The outlet of the condensate tank 3 is connected to the inlet of the lower part of the absorption tower 1 to form a circulation loop. The outlet of the adsorption tank assembly 4 is respectively connected to the inlet of the first vacuum pump 8 and the second vacuum pump 9 to realize the suction of the adsorbed gas. The inlet of the adsorption tank assembly 4 is connected to the nitrogen purge pipe 7 for purging the adsorption tank during the adsorption process. The outlet of the adsorption tank assembly 4 is connected to the exhaust pipe 5 to realize the discharge of the purified gas.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. An absorption and adsorption ultra-clean discharge device, characterized in that: The invention comprises an absorption tower, a condenser, a condensate tank, an adsorption tank assembly and a program-controlled valve. The outlet of the upper part of the absorption tower and the inlet of the condenser are connected to each other. The outlet of the condenser is connected to the inlet of the adsorption tank assembly. The outlet of the condenser is also connected to the inlet of the condensate tank. The outlet of the condensate tank is connected to the inlet of the lower part of the absorption tower. The outlet of the adsorption tank assembly is connected to the inlet of the first vacuum pump, the outlet of the adsorption tank assembly is connected to the inlet of the second vacuum pump, the inlet of the adsorption tank assembly is connected to the nitrogen purge pipe, the outlet of the adsorption tank assembly is connected to the tail gas exhaust pipe, the outlets of the first vacuum pump and the second vacuum pump are both connected to the inlet of the lower part of the absorption tower. The adsorption tank assembly comprises a first adsorption tank, a second adsorption tank , a third adsorption tank and a fourth adsorption tank, the adsorption material in the first adsorption tank is activated carbon, the adsorption material in the second adsorption tank is molecular sieve, the adsorption material in the third adsorption tank is silica gel, and the adsorption material in the fourth adsorption tank is activated carbon fiber. The condenser, the first vacuum pump and the second vacuum pump are all connected to the inlet and outlet of the cooling water pipe. A programmable valve is provided on the pipeline between the outlet of the condenser and the inlet of the adsorption tank combination, a programmable valve is provided on the pipeline between the outlet of the adsorption tank combination and the inlet of the first vacuum pump, a programmable valve is provided on the pipeline between the inlet of the adsorption tank combination and the nitrogen purge pipe, and a programmable valve is provided on the pipeline between the outlet of the adsorption tank combination and the exhaust pipe.

2. The absorption and adsorption ultra-clean discharge device according to claim 1, characterized in that The diameter of the absorption tower is 1 meter and the absorption tower is a cylindrical structure.

3. The absorption and adsorption ultra-clean discharge device according to claim 1, characterized in that: The condenser is a fin-type structure.

4. The absorption and adsorption ultra-clean discharge device according to claim 1, characterized in that: The volumes of the first adsorption tank, the second adsorption tank, the third adsorption tank and the fourth adsorption tank in the adsorption tank combination are all the same.

5. The absorption and adsorption ultra-clean discharge device according to claim 1, characterized in that: The cooling medium flowing in the cooling water pipe is water, and the flow rate is 5 cubic meters per hour.

6. The absorption and adsorption ultra-clean discharge device according to claim 1, characterized in that: The program-controlled valve can automatically adjust the opening and closing of the pipeline according to a preset program.

7. The absorption and adsorption ultra-clean discharge device according to claim 1, characterized in that: Fillers, demisters and nozzles are arranged inside the absorption tower.

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