Miniature high-concentration organic tail gas absorption and desorption device

Abstract

A miniature high-concentration organic tail gas absorption and desorption device comprises a tower body, a desorption tower and an absorption tower are mounted in the tower body, and the top surface of the tower body is connected with a tail gas outlet through a tail gas output pipeline; a tail gas inlet is formed below one side wall of the absorption tower, and a fresh absorbent inlet is formed above one side wall of the absorption tower; a cooler and a condenser are connected in series outside the tower body through connecting pipes, an output port of the cooler enters the top of the absorption tower, the bottom of the condenser is connected with a circulating pump, the circulating pump is communicated with the bottom of the desorption tower, the condenser is communicated with the bottom of the absorption tower through a first condensation pipe, and the condenser is communicated with the upper part of the desorption tower through a second condensation pipe; a heat exchanger is arranged between the bottom of the absorption tower and the top of the desorption tower; a recovered organic solvent outlet is formed in the bottom of the heat exchanger; according to the invention, through the miniaturization arrangement, the recycling of a high-concentration organic solvent and the up-to-standard emission of tail gas are realized, and the equipment investment is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical environmental protection equipment, in particular to a micro high-concentration organic tail gas absorption and desorption device. Background Art

[0002] During chemical production and storage, organic solvents are often volatilized, which affects the environment. These tail gases containing organic solvents must be treated before they can be discharged in compliance with emission standards. The treatment methods in the existing technology generally include absorption, adsorption, combustion, etc. or a combination of various methods, but without exception, they all require large investments and high operating costs, which are a burden for small enterprises. In particular, for equipment with small tail gas volume but high organic solvent concentration, the cost performance is too low and the burden on enterprises is too heavy. Utility Model Content

[0003] In view of the shortcomings of the above-mentioned existing production technology, the applicant provides a miniature high-concentration organic tail gas absorption and desorption device, thereby realizing the recovery and utilization of high-concentration organic solvents and the emission of tail gas in compliance with standards through the miniaturization of the absorption and desorption device, thereby reducing equipment investment.

[0004] The technical solution adopted by the utility model is as follows:

[0005] A micro high-concentration organic tail gas absorption and desorption device comprises a tower body, wherein a desorption tower is installed at a lower position inside the tower body, an absorption tower is installed at an upper position inside the tower body, and the top surface of the tower body is connected to a tail gas outlet via a tail gas output pipeline; a tail gas inlet is arranged below a side wall of the absorption tower, and a fresh absorbent inlet is arranged above a side wall of the absorption tower; a cooler and a condenser are connected in series via a connecting pipe outside the tower body, the output port of the cooler enters the top of the absorption tower, the bottom of the condenser is connected to a circulation pump, the circulation pump is connected to the bottom of the desorption tower, and the condenser is connected to the bottom of the absorption tower via a No. 1 condenser pipe, and the condenser is connected to the upper part of the desorption tower via a No. 2 condenser pipe; a heat exchanger is installed between the bottom of the absorption tower and the top of the desorption tower, and the bottom of the heat exchanger is provided with an outlet for recovering organic solvent; a heating pipe is arranged below the desorption tower.

[0006] As a further improvement of the above technical solution:

[0007] A filler is arranged above the absorption tower.

[0008] The cooler is provided with a cooling water outlet and a cooling water inlet.

[0009] A low-pressure steam inlet and a condensed water outlet are arranged on the tower tube wall at the heating tube.

[0010] The heating tube adopts an external coil.

[0011] The heat exchanger is provided with a cooling water input port and a cooling water output port.

[0012] The tail gas inlet enters the lower space of the absorption tower.

[0013] The beneficial effects of the utility model are as follows:

[0014] The utility model has a compact and reasonable structure and is easy to operate. Through an integrated structure, all equipment is installed in one tower body. The miniaturized setting is suitable for small-scale high-concentration exhaust gas treatment work, with low overall investment and low energy consumption.

[0015] The utility model reduces equipment and automatic control instruments, greatly reduces investment costs, and realizes automatic operation of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model.

[0017] Among them: 1. Tail gas output pipeline; 2. Tail gas outlet; 3. Tower body; 4. Absorption tower; 5. Filler; 6. Cooler; 7. Cooling water outlet; 8. Cooling water inlet; 9. Lower space; 10. No. 1 condenser; 11. Condenser; 12. No. 2 condenser; 13. Connecting pipe; 14. Desorption tower; 15. Heating pipe; 16. Circulation pump; 17. Condensate outlet; 18. Low-pressure steam inlet; 19. Recovered organic solvent outlet; 20. Cooling water input port; 21. Cooling water output port; 22. Heat exchanger; 23. Tail gas inlet; 24. Fresh absorbent inlet. DETAILED DESCRIPTION

[0018] The specific implementation of the present utility model is described below in conjunction with the accompanying drawings.

[0019] like Figure 1 As shown, the micro high-concentration organic tail gas absorption and desorption device of this embodiment includes a tower body 3, a desorption tower 14 is installed at the lower position of the tower body 3, an absorption tower 4 is installed at the upper position of the tower body 3, and the top surface of the tower body 3 is connected to the tail gas outlet 2 through the tail gas output pipeline 1; a tail gas inlet 23 is arranged at the lower side wall of the absorption tower 4, and a fresh absorbent inlet 24 is arranged at the upper side wall of the absorption tower 4; a cooler 6 and a condenser 11 are connected in series at the outside of the tower body 3 through a connecting pipe 13, and a cooling The output port of the device 6 enters the top of the absorption tower 4, the bottom of the condenser 11 is connected to the circulation pump 16, the circulation pump 16 is connected to the bottom of the desorption tower 14, and at the same time, the condenser 11 is connected to the bottom of the absorption tower 4 through the No. 1 condenser pipe 10, and the condenser 11 is connected to the upper part of the desorption tower 14 through the No. 2 condenser pipe 12; a heat exchanger 22 is installed between the bottom of the absorption tower 4 and the top of the desorption tower 14, and the bottom of the heat exchanger 22 is provided with an outlet 19 for recovering organic solvents; a heating pipe 15 is arranged below the desorption tower 14.

[0020] A packing 5 is arranged above the absorption tower 4 .

[0021] The cooler 6 is provided with a cooling water outlet 7 and a cooling water inlet 8 .

[0022] A low-pressure steam inlet 18 and a condensed water outlet 17 are provided on the tube wall of the tower body 3 at the heating tube 15 .

[0023] The heating tube 15 adopts an outer coil.

[0024] The heat exchanger 22 is provided with a cooling water inlet 20 and a cooling water outlet 21 .

[0025] The tail gas inlet 23 enters the lower space 9 of the absorption tower 4 .

[0026] The utility model can replace the absorption tower 4 and the desorption tower 14 by adding a small amount of fillers through a universal pipeline according to the tail gas treatment amount.

[0027] The utility model can adopt the sleeve to replace the condenser 11 and the heat exchanger 22.

[0028] The absorption tower 4 and the desorption tower 14 of the utility model are operated jointly, which reduces the intermediate equipment and occupies a small space.

[0029] The utility model adopts a heating tube 15 to replace the tower bottom reboiler, and the heating tube 15 can adopt an external coil.

[0030] The whole system of the utility model only needs to be provided with one pump (circulation pump 16) for circulation.

[0031] The utility model only needs a very small number of instruments to realize the automatic operation of the system.

[0032] In actual working process:

[0033] The tail gas containing high concentration of organic solvent enters the bottom of the absorption tower 4, and after fully contacting with the circulating absorbent, the organic solvent is absorbed, and the qualified tail gas is discharged from the top of the tower body 3.

[0034] The absorbent after absorbing the organic solvent flows by gravity into the desorption tower 14 and exchanges heat with the circulating absorbent under the action of the heat exchanger 22. In order to prevent the gas phase of the desorption tower 14 from short-circuiting, a liquid seal is set before entering the desorption tower 14.

[0035] A heating pipe 15 is provided at the bottom of the desorption tower 14, and steam can be used for heating and desorption. The desorbed circulating absorbent is pressurized by a circulating pump 16 from the bottom of the tower, and then heat is exchanged with the material at the bottom of the absorption tower 4 to recover heat, and then cooled to an appropriate temperature by a cooler 6 and circulated to the top of the absorption tower 4;

[0036] The desorbed organic solvent is discharged from the top of the tower, and after condensation and cooling in the condenser 11 and gas-liquid separation, a trace amount of gas phase returns to the absorption tower 4, and the liquid phase is the recovered organic solvent, which is discharged from the system after liquid sealing.

[0037] The above description is an explanation of the utility model, not a limitation of the utility model. The scope of the utility model is defined by the claims. Any form of modification can be made within the protection scope of the utility model.

Claims

1. A micro high-concentration organic tail gas absorption and desorption device, characterized in that: The invention comprises a tower body (3), wherein a desorption tower (14) is installed at a lower position inside the tower body (3), an absorption tower (4) is installed at an upper position inside the tower body (3), and the top surface of the tower body (3) is connected to an exhaust gas outlet (2) via an exhaust gas output pipeline (1); an exhaust gas inlet (23) is arranged at a lower side wall of the absorption tower (4), and a fresh absorbent inlet (24) is arranged at an upper side wall of the absorption tower (4); a cooler (6) and a condenser (11) are connected in series at the outside of the tower body (3) via a connecting pipe (13), and the output port of the cooler (6) enters the absorption tower (2). The top of the desorption tower (14) is connected to the bottom of the condenser (11), the bottom of the condenser (11) is connected to a circulation pump (16), the circulation pump (16) is connected to the bottom of the desorption tower (14), and the condenser (11) is connected to the bottom of the absorption tower (4) through a No. 1 condenser pipe (10), and the condenser (11) is connected to the upper part of the desorption tower (14) through a No. 2 condenser pipe (12); a heat exchanger (22) is installed between the bottom of the absorption tower (4) and the top of the desorption tower (14), and an outlet (19) for recovering organic solvent is provided at the bottom of the heat exchanger (22); a heating pipe (15) is arranged below the desorption tower (14).

2. A micro high-concentration organic tail gas absorption and desorption device as claimed in claim 1, characterized in that: A packing (5) is arranged above the absorption tower (4).

3. A micro high-concentration organic tail gas absorption and desorption device as claimed in claim 1, characterized in that: The cooler (6) is provided with a cooling water outlet (7) and a cooling water inlet (8).

4. A micro high-concentration organic tail gas absorption and desorption device as claimed in claim 1, characterized in that: A low-pressure steam inlet (18) and a condensed water outlet (17) are provided on the tube wall of the tower body (3) at the heating tube (15).

5. A micro high-concentration organic tail gas absorption and desorption device as claimed in claim 1, characterized in that: The heating tube (15) is an external coil.

6. A micro high-concentration organic tail gas absorption and desorption device as claimed in claim 1, characterized in that: The heat exchanger (22) is provided with a cooling water input port (20) and a cooling water output port (21).

7. A micro high-concentration organic tail gas absorption and desorption device as claimed in claim 1, characterized in that: The tail gas inlet (23) enters the lower space (9) of the absorption tower (4).

Images