Tail gas duty washing combined liquid seal purification tower

Abstract

The utility model relates to a tail gas duty washing combined liquid seal purification tower, which belongs to the technical field of tail gas treatment and comprises an outer cylinder and a multi-stage combined water seal, a tail gas washing purification tower is arranged on the upper portion of the multi-stage combined water seal, and a tail gas treatment mechanism is arranged on the outer cylinder. And the tail gas treatment mechanism comprises a filler cleaning section outer barrel fixedly mounted at the top of the outer barrel. According to the tail gas duty washing combined liquid seal purification tower, desalted water is added into the tower top in a duty mode, countercurrent washing is conducted on tail gas sent out by water seals, the replacement efficiency of a new water seal structure is high, polluted water in the water seals can be rapidly replaced, multi-stage water seal series connection is adopted, efficient filler cleaning is combined, static and dynamic gas-liquid concentration differences are formed, meanwhile, water is added according to needs, and the tail gas duty washing combined liquid seal purification tower is high in practicability. An online pollutant detector is designed at the outlet of the tower, the duty washing period and the washing duration are automatically controlled, the filler spraying density and the duty water adding mode are guaranteed, the cleaning effect is effectively guaranteed, and meanwhile the water adding amount is reduced to the maximum extent.

Description

Technical Field

[0001] The utility model relates to the technical field of tail gas treatment, in particular to a tail gas space-time washing combined liquid-sealed purification tower, which is applied to the purification of tail gas from storage tanks or high-efficiency purification of tail gas from production equipment. Background Art

[0002] Among the existing tail gas treatment equipment, the packed type washing purification tower is one of the common tail gas treatment equipment. However, there are still some problems in the traditional packed purification tower during the tail gas treatment process, such as the packing circulation spraying, low efficiency, generally requiring multiple stages, large recovery equipment diameter, large floor space, and high energy consumption (multiple towers in front and behind continuously circulate and spray). In the conventional water seal method, the solution in the water seal quickly becomes saturated and needs to be replaced, and the water consumption is large. Therefore, an exhaust gas space-occupied washing combined liquid seal purification tower is proposed to solve the above technical problems. Utility Model Content

[0003] In response to the shortcomings of the existing technology, the utility model provides an exhaust gas space-washing combined liquid-sealed purification tower, which has the advantages of water saving, high efficiency, and timely cleaning. It solves some problems that still exist in the traditional purification tower in the exhaust gas treatment process, such as low efficiency of the washing tower, large footprint of the multi-tower design, high energy consumption of non-stop circulation spraying, and the solution in the conventional water seal replacement water seal quickly saturates and needs to be replaced, which consumes a lot of water.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an exhaust gas space-time washing combined liquid seal purification tower, comprising an outer cylinder and a multi-stage combined water seal, wherein the outer cylinder is provided with an exhaust gas treatment mechanism;

[0005] The exhaust gas treatment mechanism includes a packing cleaning section outer cylinder fixedly mounted on the top of the outer cylinder, an exhaust gas inlet fixedly mounted on the lower right side of the outer cylinder, and multiple groups of combined water seal cleaning water outlets fixedly mounted on the lower left side of the outer cylinder;

[0006] Each water seal unit of the multi-stage combined water seal is composed of a water seal top cover, an overflow pipe, a water seal inner cylinder, a liquid seal pipe, an air riser, a bubble cap, a baffle ring plate, and an outer cylinder.

[0007] Furthermore, several water seals in the multi-stage combined water seal are combined in an upper and lower manner, and the washing water of the filler section enters each water seal unit in sequence from top to bottom.

[0008] Furthermore, the exhaust gas treatment mechanism also includes a packing cleaning section outer cylinder fixedly installed on the top of the outer cylinder, the interior of the packing cleaning section outer cylinder is provided with a high-efficiency wire mesh structured packing, the top of the high-efficiency wire mesh structured packing is provided with a high-efficiency distributor for cleaning water, a cleaning water inlet is fixedly installed on the right side of the packing cleaning section outer cylinder, the top of the high-efficiency distributor for cleaning water is provided with a demister, and the top of the packing cleaning section outer cylinder is provided with a purified gas discharge port.

[0009] Furthermore, the airflow direction inside the outer cylinder and the outer cylinder of the filler cleaning section is from bottom to top, and the washing liquid inside the outer cylinder and the outer cylinder of the filler cleaning section flows from top to bottom.

[0010] Furthermore, the water seal top cover is conical and is combined with a liquid seal pipe, and the tip of the water seal top cover faces upward.

[0011] Furthermore, a plurality of unit water seals with the same function are stacked up and down.

[0012] Furthermore, the installation position of the tail gas inlet is located above the multiple groups of combined water seal cleaning water outlets.

[0013] Compared with the existing technology, the technical solution of this application has the following beneficial effects:

[0014] This tail gas space-washing combined liquid-seal purification tower uses a space-washing method to add desalted water to the top of the tower, countercurrently washing the tail gas sent out by the water seal. The new water seal structure has a high replacement efficiency and can quickly replace contaminated water within the water seal. It uses multiple water seals in series, combined with high-efficiency packing cleaning, to create static and dynamic gas-liquid concentration differences. Water is added as needed. An online pollutant detector is designed at the tower outlet to automatically control the space-washing cycle and washing duration, ensuring the packing spray density. The space-washing water method effectively guarantees the cleaning effect while minimizing the amount of water added. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic cross-sectional view of the structure of the utility model;

[0016] Figure 2 It is a three-dimensional schematic diagram of the structure of the utility model.

[0017] In the figure: 1. Purified gas discharge port; 2. Defoamer; 3. Cleaning water inlet; 4. High-efficiency distributor for cleaning water; 5. High-efficiency wire mesh structured packing; 6. Water seal top cover; 7. Overflow pipe; 8. Single water seal inner cylinder; 9. Tail gas inlet; 10. Multiple groups of combined water seal cleaning water outlets; 11. Liquid seal pipe; 12. Riser; 13. Bubble cap; 14. Baffle plate; 15. Outer cylinder; 16. Outer cylinder of packing cleaning section. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] See also Figures 1 to 2 In this embodiment, a tail gas space washing combined liquid seal purification tower includes an outer cylinder 15 and a multi-stage combined water seal, and the outer cylinder 15 is provided with a tail gas treatment mechanism

[0020] See also Figure 1 and Figure 2 The exhaust gas treatment mechanism includes a packing cleaning section outer cylinder 16 fixedly installed on the top of the outer cylinder 15, an exhaust gas inlet 9 is fixedly installed on the lower right part of the outer cylinder 15, and multiple groups of combined water seal cleaning water outlets 10 are fixedly installed on the lower left part of the outer cylinder 15. The installation position of the exhaust gas inlet 9 is located above the multiple groups of combined water seal cleaning water outlets 10. When the exhaust gas is cleaned, the exhaust gas enters and flows upward through the exhaust gas inlet 9 located at the multiple groups of combined water seal cleaning water outlets 10, thereby reducing the risk of exhaust gas overflow.

[0021] Among them, each water seal unit of the multi-stage combined water seal is composed of a water seal top cover 6, an overflow pipe 7, a water seal inner cylinder 8, a liquid seal pipe 11, an air riser 12, a bubble cap 13, a deflection baffle ring plate 14, and an outer cylinder 15. It should be added that the water seal top cover 6 is conical and combined with the liquid seal pipe 11, and the tip of the water seal top cover 6 is facing upward.

[0022] Among them, several water seals in the multi-stage combined water seal adopt an upper and lower combination method. The washing water of the filler section enters each water seal unit from top to bottom in sequence. The water seal inner cylinder 8 diversion and the top center overflow pipe 7 structure bring high water seal unit conversion efficiency, so the amount of washing water is greatly saved.

[0023] In this embodiment, the exhaust gas treatment mechanism also includes a packing cleaning section outer cylinder 16 fixedly installed on the top of the outer cylinder 15. The airflow direction inside the outer cylinder 15 and the packing cleaning section outer cylinder 16 is from bottom to top, and the washing liquid inside the outer cylinder 15 and the packing cleaning section outer cylinder 16 flows from top to bottom. The interior of the packing cleaning section outer cylinder 16 is provided with a high-efficiency wire mesh structured packing 5, and the top of the high-efficiency wire mesh structured packing 5 is provided with a high-efficiency distributor 4 for cleaning water. A cleaning water inlet 3 is fixedly installed on the right side of the packing cleaning section outer cylinder 16, and a demister 2 is provided on the top of the high-efficiency distributor 4 for cleaning water. The top of the packing cleaning section outer cylinder 16 is provided with a purified gas discharge port 1.

[0024] It should be added that the airflow direction inside the multi-stage combined water seal outer cylinder 15 and the packing cleaning section outer cylinder 16 is from bottom to top, and the washing liquid inside the multi-stage combined water seal outer cylinder 15 and the packing cleaning section outer cylinder 16 flows from top to bottom, which facilitates the contact of the washing liquid from top to bottom with the exhaust gas from bottom to top, thereby washing the recyclable substances in the exhaust gas.

[0025] It should be noted that the exhaust gas empty-space washing combined liquid-seal purification tower adds desalted water to the top of the tower in an empty-space manner, and performs countercurrent washing on the exhaust gas sent out by the water seal. The new water seal structure has high replacement efficiency and can quickly replace the contaminated water in the water seal. It adopts multi-stage water seals in series and combines high-efficiency filler cleaning to form static and dynamic gas-liquid concentration differences. At the same time, water is added as needed. An online pollutant detector is designed at the tower outlet to automatically control the empty-space washing cycle and washing time, ensuring the filler spray density and the empty-space water adding method, which effectively ensures the cleaning effect while minimizing the amount of water added.

[0026] The working principle of the above embodiment is:

[0027] The tail gas occupied space washing combined liquid seal purification tower, when treating the tail gas, connects the tail gas pipe with the tail gas inlet 9, and feeds the washing water from the washing water inlet 3 into the washing water high-efficiency distributor 4 for uniform distribution, and then enters the high-efficiency wire mesh structured packing 5. The recyclable substances remaining in the tail gas in the rising air flow in the washing tower from top to bottom, and the washing water flowing down from the end of the high-efficiency wire mesh structured packing 5 are blocked by the unit combination purification water seal top cover 6 and enter the annular gap formed by the unit combination purification water seal inner cylinder 8 and the unit combination purification water seal baffle 14, and enter the combined unit water seal bubbling absorption area from the channel on the circumference of the lower end of the unit combination purification water seal inner cylinder 8. The gas deflected from the unit combination purification water seal riser 12 is diverted at the lower end of the bubble cap and is absorbed by bubbling in the liquid seal.

[0028] Subsequently, the gas-water mixture is separated into gas and water in the top space of the unit combination purification water seal bubble 13, and the gas is blocked and deflected by the annular unit combination purification water seal bubble 13. The gas passes through the annular gap formed by the unit combination purification water seal top cover 6 and the unit combination purification water seal inner tube 8, enters the filler section from below, and continues to be washed. The liquid flows from the bubble center tube into the liquid seal on the next-level liquid seal unit combination purification water seal top cover 6, and serves as the sealing liquid absorption liquid for the next-level liquid seal. Subsequently, according to the medium characteristics and tail gas cleaning index requirements, and related equipment indicators, 1 to 3 layers of unit combination liquid seals can be designed to form a multi-stage liquid seal in series to ensure that the indicators are qualified. At the same time, the addition of cleaning water is automatic and intermittent, and the purified gas discharge port 1 can be installed with online gas detection equipment to automatically control the water addition flow intensity, water addition cycle and water addition time (i.e. duty cycle control).

[0029] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0030] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tail gas space-time washing combined liquid seal purification tower, comprising an outer cylinder (15) and a multi-stage combined water seal, characterized in that: The outer cylinder (15) is provided with an exhaust gas treatment mechanism; The tail gas treatment mechanism comprises a packing cleaning section outer cylinder (16) fixedly mounted on the top of the outer cylinder (15), a tail gas inlet (9) fixedly mounted on the lower right side of the outer cylinder (15), and a plurality of combined water seal cleaning water outlets (10) fixedly mounted on the lower left side of the outer cylinder (15); Each water seal unit of the multi-stage combined water seal is composed of a water seal top cover (6), an overflow pipe (7), a water seal inner cylinder (8), a liquid seal pipe (11), an air riser (12), a bubble cap (13), a baffle ring plate (14), and an outer cylinder (15).

2. The tail gas space-time washing combined liquid-sealed purification tower according to claim 1, characterized in that: Several water seals in the multi-stage combined water seal are combined in an upper and lower manner, and the wash water of the filler section enters each water seal unit in sequence from top to bottom.

3. The tail gas space-time washing combined liquid-sealed purification tower according to claim 1, characterized in that: The tail gas treatment mechanism further comprises a packing cleaning section outer cylinder (16) fixedly mounted on the top of the outer cylinder (15); a high-efficiency wire mesh structured packing (5) is arranged inside the packing cleaning section outer cylinder (16); a high-efficiency cleaning water distributor (4) is arranged on the top of the high-efficiency wire mesh structured packing (5); a cleaning water inlet (3) is fixedly mounted on the right side of the packing cleaning section outer cylinder (16); a demister (2) is arranged on the top of the high-efficiency cleaning water distributor (4); and a purified gas discharge port (1) is arranged on the top of the packing cleaning section outer cylinder (16).

4. The tail gas space-time washing combined liquid-sealed purification tower according to claim 1, characterized in that: The airflow direction inside the outer cylinder (15) and the outer cylinder (16) of the packing cleaning section is from bottom to top, and the washing liquid inside the outer cylinder (15) and the outer cylinder (16) of the packing cleaning section flows from top to bottom.

5. The tail gas space-time washing combined liquid-sealed purification tower according to claim 1, characterized in that: The water seal top cover (6) is conical and is combined with a liquid seal pipe (11), and the tip of the water seal top cover (6) faces upward.

6. The tail gas space-time washing combined liquid-sealed purification tower according to claim 1, characterized in that: Multiple water seal units with the same function are stacked up and down.

7. The tail gas space-time washing combined liquid-sealed purification tower according to claim 1, characterized in that: The installation position of the tail gas inlet (9) is located above the multiple groups of combined water seal cleaning water outlets (10).

Images