CN217698605U

CN217698605U - Automatic control spray tower for waste gas treatment

Info

Publication number: CN217698605U
Application number: CN202221255700.1U
Authority: CN
Inventors: 王丰海; 朱宗华
Original assignee: Shandong Shengbao Heat Transfer Technology Co ltd
Current assignee: Shandong Shengbao Heat Transfer Technology Co ltd
Priority date: 2022-05-24
Filing date: 2022-05-24
Publication date: 2022-11-01
Anticipated expiration: 2032-05-24

Abstract

The utility model relates to the technical field of waste gas treatment equipment, and an automatic control spray tower for waste gas treatment is disclosed, which comprises a tower body, a chimney is communicated with a flue gas outlet through a flue gas pipeline, a plurality of spray layers are arranged in the tower body, spray liquid is stored at the bottom of the tower body, a spray liquid inlet and a circulation port of the spray liquid are arranged on the side wall of the tower body, a spray liquid outlet is arranged on the bottom surface of the tower body, the spray liquid is communicated with the spray layers through the circulation port, the spray liquid inlet is connected with a liquid supplementing solenoid valve, the spray liquid outlet is connected with a liquid discharging solenoid valve, a probe of a liquid level meter is arranged at the spray liquid position in the tower body, an active carbon box and a PID waste gas detector are sequentially arranged on the flue gas pipeline along the flue gas conveying direction, the liquid level meter and the PID waste gas detector are respectively and are in communication connection with a PLC control system, and the liquid supplementing solenoid valve and the liquid discharging solenoid valve are electrically connected with the PLC control system; realize the full automatic control of exhaust-gas treatment, satisfy mixed waste gas simultaneous processing, guarantee that tail gas emission up to standard.

Description

Automatic control spray tower for waste gas treatment

Technical Field

The utility model relates to an exhaust-gas treatment equipment technical field especially relates to an exhaust-gas treatment automatic control spray column.

Background

The waste gas purification treatment mainly refers to the treatment of industrial waste gas such as dust particles, smoke and dust, peculiar smell gas and toxic and harmful gas generated in industrial places. The common waste gas purification treatment includes factory dust and waste gas purification, workshop dust and waste gas purification, organic waste gas purification, waste gas peculiar smell purification, acid-base waste gas purification, chemical waste gas purification and the like.

In the prior art, a spray tower is adopted to treat waste gas, the waste gas is absorbed by spray liquid in the spray tower and then discharged into the atmosphere through a chimney, in order to detect whether the waste gas emission reaches the standard, whether the spray liquid needs to be replaced is generally judged by detecting the pH value of the spray liquid in the spray tower so as to avoid the discharged waste gas exceeding the standard, however, the detection method has certain limitation, because some gases such as ethanol, methanol and the like are dissolved in water and then do not influence the pH value of the spray liquid, in addition, the absorption efficiency of the spray liquid is also influenced by factors such as equipment design, environmental temperature and the like, the detection data lag, the detection is complex, and the data are unstable, so if the pH value of the spray liquid is still detected by a traditional means to judge whether the discharged waste gas obviously reaches the standard, the detection method is not suitable any more. The waste gas discharged in industrial production is very complex in components, is water-soluble and water-insoluble, shows acidity and alkalinity after being dissolved in water, and is still neutral after being dissolved in water, so that the existing waste gas detection means can not accurately judge when spray liquid needs to be replaced so as to ensure that the tail gas is discharged up to the standard and can not meet the use requirement.

Disclosure of Invention

The utility model aims to solve the technical problem that a waste gas detection data is reliable, degree of automation is high, exhaust-gas treatment automatic control spray column thorough is provided.

In order to solve the technical problem, the technical scheme of the utility model is that: waste gas treatment automatic control spray column, including the tower body, the lower part of tower body is equipped with the flue gas entry, the top of tower body is equipped with exhanst gas outlet, exhanst gas outlet has the chimney through the flue gas pipeline intercommunication, upper portion is equipped with a plurality of layers that spray in the tower body, the bottom of tower body is stored and is sprayed liquid, be equipped with the circulation mouth that sprays the liquid entry and spray liquid on the lateral wall of tower body, be equipped with on the bottom surface of tower body and spray the liquid export, it passes through to spray liquid the circulation mouth with it is linked together to spray the layer, it has the fluid infusion solenoid valve to spray the liquid entry linkage, it is connected with the flowing back solenoid valve to spray the liquid exit, lie in the tower body spray the probe that liquid department installed the level gauge, install active carbon box and PID waste gas detector in proper order along flue gas direction of delivery on the flue gas pipeline, the level gauge with PID waste gas detector is communication connection respectively has PLC control system, PLC control system electricity is connected the fluid infusion solenoid valve with the flowing back solenoid valve.

As an optimal technical scheme, an induced draft fan is installed at a position, between the activated carbon box and the chimney, on the flue gas pipeline, and the induced draft fan is connected with the PLC control system.

As an optimized technical scheme, a plurality of packing layers are arranged above the spraying liquid in the tower body, the packing layers and the spraying layers are alternately arranged, and a defogging layer is also arranged above the spraying layer at the top of the tower body.

As a preferred technical scheme, an observation access hole is respectively formed in the tower body above each layer of spraying layer.

As a preferable technical scheme, a spraying liquid overflow port is further arranged on the side wall of the tower body.

As an optimized technical scheme, each layer of spraying layer is communicated with the spraying liquid through a circulating pipeline, a circulating pump is installed on the circulating pipeline, a pressure gauge is installed on the circulating pipeline on the outlet side of the circulating pump, and the pressure gauge is electrically connected with the PLC control system.

Due to the adoption of the technical scheme, the automatic control spray tower for waste gas treatment comprises a tower body, the lower part of the tower body is provided with a flue gas inlet, the top of the tower body is provided with a flue gas outlet, the flue gas outlet is communicated with a chimney through a flue gas pipeline, the upper part in the tower body is provided with a plurality of spray layers, spray liquid is stored at the bottom of the tower body, the side wall of the tower body is provided with a spray liquid inlet and a spray liquid circulating port, the bottom surface of the tower body is provided with a spray liquid outlet, the spray liquid is communicated with the spray layers through the circulating port, the spray liquid inlet is connected with a liquid supplementing electromagnetic valve, the spray liquid outlet is connected with a liquid discharging electromagnetic valve, a probe of a liquid level meter is installed at the position of the spray liquid in the tower body, an activated carbon box and a PID waste gas detector are sequentially installed along the flue gas conveying direction on the flue gas pipeline, the liquid level meter and the PID waste gas detector are respectively and are in communication connection with a PLC control system, and the liquid supplementing electromagnetic valve and the liquid discharging electromagnetic valve are electrically connected with the PLC control system; the utility model has the advantages that: the gas generated in the waste gas source is collected by the gas collecting hood, then is guided to the spray tower through the air pipe, enters the tower body from the flue gas inlet below the spray tower, the waste gas quickly fills the tower body, then uniformly rises and is absorbed through the spray layer, and a gas-liquid reverse absorption mode is adopted, namely, liquid is sprayed downwards from the top of the tower in a fog shape (or small liquid drops), and the waste gas is in gas-liquid contact with the tower body (reverse flow). Water-soluble waste gas such as methanol, ethanol and the like enters the spraying liquid after being absorbed by the spraying layer, water-insoluble waste gas such as toluene and the like enters the flue gas pipeline from the flue gas outlet and is absorbed by the activated carbon box, and then the gas reaching the standard is discharged from a chimney. In order to enhance the absorption rate of water-soluble waste gas, a plurality of spraying layers are arranged in the tower body, and the absorption efficiency is improved by layer-by-layer absorption. The utility model discloses install PID exhaust gas detection appearance between activated carbon box and chimney, thoroughly solved traditional mode through measuring the pH valve that sprays the liquid and monitored the drawback that whether the liquid needs to be changed, because like methyl alcohol, waste gas such as ethanol does not produce the pH value after dissolving in water yet, consequently through installing PID exhaust gas detection appearance on flue gas pipeline after, no matter be water-soluble or the waste gas that does not dissolve in water, no matter be present pH value or neutral waste gas after dissolving in water, can detect, the accurate definite and sensitivity of waste gas monitoring has been improved, PID exhaust gas detection appearance gives PLC control system with the data transmission that detects in addition, PLC control system control fluid infusion valve fluid infusion, perhaps control flowing back valve flowing back, the level gauge can give PLC control system with the liquid level condition real-time transmission who sprays the liquid, control fluid infusion valve stops the fluid infusion after PLC control system analysis, perhaps control fluid infusion valve stops the flowing back until PID exhaust gas detection appearance detects exhaust gas data up to standard, exhaust gas detection appearance has realized exhaust gas treatment's full automatic control, and satisfy the simultaneous processing of multiple mixed waste gas, up to standard tail gas emission has been guaranteed, satisfy the user demand.

Drawings

The following drawings are only intended to illustrate and explain the present invention, and do not limit the scope of the present invention. Wherein:

fig. 1 is a schematic structural diagram of the automatic control spray tower for waste gas treatment of the present invention.

In the figure: 1-a tower body; 2-a flue gas inlet; 3-a flue gas outlet; 4-a flue gas pipeline; 5-a chimney; 6-spraying layer; 7-spraying liquid; 8-spraying liquid inlet; 9-spraying liquid outlet; 10-fluid infusion electromagnetic valve; 11-a drain solenoid valve; 12-a liquid level meter; 13-an activated carbon box; 14-PID exhaust gas detector; 15-a PLC control system; 16-a packing layer; 17-a defogging layer; 18-a draught fan; 19-observing the access hole; 20-a circulating pump; 21-a sewage tank; 22-a spray overflow port; 23-pressure gauge; 24-a source of exhaust gas; 25-process water.

Detailed Description

The invention is further explained below with reference to the drawings and examples. In the following detailed description, certain exemplary embodiments of the present invention have been described by way of illustration only. Needless to say, a person skilled in the art will recognize that the described embodiments can be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive on the scope of the claims.

As shown in fig. 1, exhaust-gas treatment automatic control spray column, including tower body 1, the lower part of tower body 1 is equipped with flue gas inlet 2, and the top of tower body 1 is equipped with exhanst gas outlet 3, and exhanst gas outlet 3 has chimney 5 through 4 intercommunications of flue gas pipeline, and upper portion is equipped with a plurality of layers 6 that spray in tower body 1, and the bottom storage of tower body 1 has spray liquid 7, its characterized in that: a spray liquid inlet 8 and a spray liquid circulating port are arranged on the side wall of the tower body 1, a spray liquid outlet 9 is arranged on the bottom surface of the tower body 1, the spray liquid 7 is communicated with the spray layer 6 through the circulating port, the spray liquid inlet 8 is connected with a liquid supplementing electromagnetic valve 10, the spray liquid outlet 9 is connected with a liquid discharging electromagnetic valve 11, a probe of a liquid level meter 12 is arranged at the spray liquid 7 in the tower body 1, an active carbon box 13 and a PID waste gas detector 14 are sequentially arranged on the flue gas pipeline 4 along the flue gas conveying direction, the liquid level meter 12 and the PID waste gas detector 14 are respectively in communication connection with a PLC control system 15, and the PLC control system 15 is electrically connected with the liquid supplementing electromagnetic valve 10 and the liquid discharging electromagnetic valve 11; the gas generated in the waste gas source 24 is collected by the gas-collecting hood, then guided to the spray tower through the air pipe, enters the tower body 1 from the flue gas inlet 2 below the spray tower, the waste gas quickly fills the tower body 1, then uniformly rises and is absorbed through the spray layer 6, and the gas-liquid reverse absorption mode is adopted, namely, the liquid downwards sprays in a fog (or small liquid drop) from the top of the tower, and the waste gas reversely flows upwards from the tower body 1 to achieve the purpose of gas-liquid contact. The process water 25 is generally tap water, the process water 25 is conveyed into the tower body 1 through a liquid supplementing valve to supplement the spray liquid 7, water-soluble waste gas such as methanol, ethanol and the like enters the spray liquid 7 after being absorbed by the spray layer 6, water-insoluble waste gas such as toluene and the like enters the flue gas pipeline 4 from the flue gas outlet 3 and is absorbed by the activated carbon box 13, and then the gas reaching the standard is discharged from the chimney 5. In order to enhance the absorption rate of water-soluble waste gas, a plurality of spraying layers 6 are arranged in the tower body 1, and the absorption efficiency is improved by layer-by-layer absorption. The utility model discloses install PID exhaust gas detection appearance 14 between activated carbon box 13 and chimney 5, thoroughly solved traditional mode through measuring the pH valve that sprays liquid 7 and monitored whether the drawback that sprays liquid 7 and need change, because like methyl alcohol, waste gas such as ethanol does not also produce the pH value after dissolving in water, consequently through installing PID exhaust gas detection appearance 14 back on flue gas pipeline 4, no matter be water-soluble or the waste gas that does not dissolve in water, no matter be dissolved in and present pH value or neutral waste gas after the water, can detect, the accurate definite and sensitivity of exhaust gas monitoring has been improved, PID exhaust gas detection appearance 14 gives PLC control system 15 with the data transmission that detects in addition, PLC control system 15 control liquid supply valve fluid infusion, or control flowing back valve flowing back, level gauge 12 can give PLC control system 15 with the liquid level condition real-time transmission that sprays liquid 7, PLC control liquid supply valve stops the fluid infusion after the analysis of PLC control system 15, or control flowing back valve stops, until PID exhaust gas detection appearance 14 detects's waste gas data, the full automatic control of exhaust gas treatment has been realized, and the simultaneous processing of multiple mixed waste gas is satisfied, and the exhaust emission up to standard is guaranteed, use the flowing back demand up to reach standard.

As shown in fig. 1, an induced draft fan 18 is installed at a position between the activated carbon box 13 and the chimney 5 on the flue gas pipeline 4, and the induced draft fan 18 is connected with the PLC control system 15. The induced draft fan 18 can accelerate the circulation of the waste gas, the induced draft fan 18 is installed on the position, closest to the chimney 5, of the flue gas pipeline 4, the waste gas can flow into the chimney 5 more smoothly, when the PID waste gas detector 14 detects that the waste gas exceeds the standard, a signal is transmitted to the PLC control system 15, the PLC control system 15 controls the induced draft fan 18 to be closed, and the discharge of the waste gas is stopped.

As shown in fig. 1, a plurality of packing layers 16 are arranged above the spraying liquid 7 in the tower body 1, the packing layers 16 and the spraying layers 6 are alternately arranged, and a defogging layer 17 is also arranged above the spraying layer 6 at the top of the tower body 1. The packing layer 16 is designed to increase its area so that the two-phase flow of the exhaust gas and the liquid can be sufficiently contacted without causing a large resistance. The packing layer 16 is the core component of the spray tower, and the direct relationship between the good operation performance and the bad operation performance of the tower is realized. The filler in the filler layer 16 has a large specific surface area and a large porosity, and the filler material has high strength, is not easy to break, has light weight, is corrosion-resistant, and is low in price. The common spray tower is mainly filled with polyhedral hollow spheres, and the polyhedral hollow spheres are commonly used in a waste gas tower for removing hydrogen, oxygen and carbon dioxide. The polyhedral hollow sphere is mainly made of PP material, and has light weight, corrosion resistance, heat resistance and low price. And its porosity is large. The uppermost part of the tower body 1 is a demisting layer 17, the demisting layer 17 can remove absorption liquid fog drops carried in the gas, and the treated clean air is discharged into the atmosphere from a fan.

As shown in fig. 1, an observation access hole 19 is respectively arranged on the tower body 1 above each layer of spraying layer 6. The observation access hole 19 not only can make things convenient for the staff to observe whether normal operating is gone on to the equipment that sprays in spraying layer 6, and the nozzle has or not to block up etc. can also make things convenient for the staff to enter into tower body 1 and maintain, observes the access hole 19 in addition and also is the installing port of packing, can install and maintain packing through observing access hole 19.

As shown in fig. 1, a spraying liquid overflow port 22 is further provided on the side wall of the tower body 1. The spraying liquid overflow port 22 is arranged for preventing the excessive replenishment of the spraying liquid 7 from spreading to the upper part of the tower body 1, and an overflow pipeline connected with the spraying liquid overflow port 22 and a pipeline at the spraying liquid outlet 9 are converged and discharged into the sewage tank 21.

As shown in fig. 1, each spraying layer 6 is communicated with the spraying liquid 7 through a circulating pipeline, a circulating pump 20 is installed on the circulating pipeline, a pressure gauge 23 is installed on the circulating pipeline on the outlet side of the circulating pump 20, and the pressure gauge 23 is electrically connected with the PLC control system 15. The pressure gauge 23 monitors the pipeline pressure between the spraying layer 6 and the spraying liquid 7 in real time, when the pipeline pressure detected by the pressure gauge 23 is greater than a set value, a signal is transmitted to the PLC control system 15, the PLC control system 15 sends alarm information to remind a worker to overhaul whether the circulating pump 20 is blocked or not or whether the pipeline is blocked or not, and therefore the circulating pump 20 or the pipeline is prevented from being damaged due to long-term excessive pressure.

The utility model has the advantages of it is following:

(1) Not only can absorb water-soluble waste gas, but also can absorb water-insoluble waste gas.

(2) The method not only can detect the waste gas which shows acidity and alkalinity after being dissolved in water, but also can detect the waste gas which is not dissolved in water.

(3) The PID waste gas detector 14 detects whether waste gas reaches the standard in real time, controls the liquid replenishing valve to automatically replenish liquid through the PLC control system 15, and controls the liquid discharging valve to automatically discharge liquid. The automatic monitoring and automatic liquid supplementing and discharging control of the waste gas are realized, and the discharged waste gas is guaranteed to reach the standard all the time.

The technical scheme of the application is essentially to improve the composition and connection relation of hardware parts, and does not relate to the improvement of a software program or a circuit structure per se.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

The foregoing shows and describes the general principles, essential features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. Waste gas treatment automatic control spray column, including tower body (1), the lower part of tower body (1) is equipped with flue gas inlet (2), the top of tower body (1) is equipped with exhanst gas outlet (3), exhanst gas outlet (3) have chimney (5) through flue gas pipeline (4) intercommunication, upper portion is equipped with a plurality of spray layers (6) in tower body (1), the bottom storage of tower body (1) has spray liquid (7), its characterized in that: be equipped with on the lateral wall of tower body (1) and spray liquid entry (8) and spray the circulation mouth of liquid (7), be equipped with on the bottom surface of tower body (1) and spray liquid export (9), it passes through to spray liquid (7) the circulation mouth with spray layer (6) and be linked together, it is connected with fluid infusion solenoid valve (10) to spray liquid entry (8), it is connected with flowing back solenoid valve (11) to spray liquid export (9), be located in tower body (1) spray liquid (7) and locate the probe of installing level gauge (12), install activated carbon box (13) and PID waste gas detection appearance (14) along flue gas direction of delivery in proper order on flue gas pipeline (4), level gauge (12) with PID waste gas detection appearance (14) communication connection has PLC control system (15) respectively, PLC control system (15) electricity is connected fluid infusion solenoid valve (10) with flowing back solenoid valve (11).

2. The automatic control spray tower for waste gas treatment of claim 1, wherein: the tower body (1) is internally located a plurality of packing layers (16) are arranged above the spraying liquid (7), the packing layers (16) and the spraying layers (6) are alternately arranged, and the top of the tower body (1) is located a defogging layer (17) is also arranged above the spraying layers (6).

3. The automatic control spray tower for waste gas treatment of claim 2, wherein: the flue gas pipeline (4) is located the active carbon box (13) with draught fan (18) are installed to the position between chimney (5).

4. The automatic control spray tower for waste gas treatment of claim 2, wherein: the tower body (1) is provided with an observation access hole (19) above each layer of the spraying layer (6).

5. The automatic control spray tower for waste gas treatment of claim 2, wherein: the side wall of the tower body (1) is also provided with an overflow port of spraying liquid (7).

6. The automatic control spray tower for treating exhaust gas according to any one of claims 1 to 5, wherein: every layer spray layer (6) respectively through circulating line with spray liquid (7) intercommunication, last circulating pump (20) of installing of circulating line is located circulating pump (20) outlet side install manometer (23) on the circulating line, manometer (23) electricity is connected PLC control system (15).