CN219722412U - High-efficient multistage absorption tower - Google Patents

High-efficient multistage absorption tower Download PDF

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Publication number
CN219722412U
CN219722412U CN202320723758.2U CN202320723758U CN219722412U CN 219722412 U CN219722412 U CN 219722412U CN 202320723758 U CN202320723758 U CN 202320723758U CN 219722412 U CN219722412 U CN 219722412U
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liquid
absorption tower
circulating
new liquid
tower body
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CN202320723758.2U
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杜佳棋
吴卫剑
李进
周强
朱玲萍
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Zhejiang Xinchengyu Environmental Technology Co ltd
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Zhejiang Xinchengyu Environmental Technology Co ltd
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Abstract

The utility model discloses a high-efficiency multistage absorption tower. The utility model relates to an improved absorption tower structure, which comprises a medicament tank, a medicament adding system, a clear water tank, a new liquid system, a circulating liquid system and an absorption tower system, wherein the absorption tower system comprises a tower body, an air flow uniform distribution plate, a filler, a circulating liquid spraying layer, a new liquid spraying layer and a demister, the medicament tank is respectively communicated with the new liquid system and the tower body through two paths of the medicament adding system, the clear water tank is communicated with the new liquid system, the new liquid system is communicated with the new liquid spraying layer, the circulating liquid system is communicated with the bottom of the tower body and the circulating liquid spraying layer, the quantity of absorbent carried in the process of draining liquid by the circulating liquid can be effectively reduced, the drainage frequency can be properly increased, the drainage is realized without stopping the machine, and the consumption of the absorbent is reduced.

Description

High-efficient multistage absorption tower
Technical Field
The utility model relates to the technical field of environmental protection, in particular to a high-efficiency multistage absorption tower.
Background
At present, a plurality of projects in the industry adopt a chemical washing process to remove pollutants in waste gas, and an absorption tower serving as main equipment mostly adopts a form of a packing tower, wherein an absorbent is pumped into a circulating pool by a dosing pump, and is pumped into a spiral nozzle arranged at the top of the absorption tower by the circulating pump after being stirred and mixed; the absorption liquid is sprayed by the spiral nozzle and then flows through the filler to fully contact and react with the waste gas passing through the absorption tower; and after the reaction, the residual absorption liquid flows into a circulating pool at the lower part of the absorption tower for recycling.
For the current absorber, it has the following disadvantages:
(1) Because the circulating liquid is used, a spiral nozzle which is not easy to block is adopted, the atomization effect of the nozzle is relatively poor, and the absorption efficiency is directly influenced by the quality of the atomization effect;
(2) The PH meter is placed in the affiliated water tank of the absorption tower, and because the water tank is small, the fluctuation of PH/concentration value is relatively large during the adding process, the integral PH/concentration value of the circulating liquid can not reach the use requirement, and the adding process is stopped in advance, so that the PH/concentration control of the circulating liquid is not accurate enough.
(3) The absorption liquid is controlled to be added into an auxiliary water tank of the absorption tower according to the PH/concentration value interval, a stirrer is not arranged, the concentration of the spraying liquid can be instantaneously increased during the adding period, and the spraying liquid can be quickly lowered after stopping adding the medicine, so that the adaptability to the fluctuation of the working condition of the waste gas is poor, and the rapid and reasonable reaction can not be carried out according to the fluctuation of the working condition. If the agent is alkali, the nozzle is easy to be blocked and the filler is easy to be scaled and blocked.
(4) The circulating liquid replacement modes are two types: thorough replacement (stopping pump) and multiple replacement (not stopping pump). Thoroughly replacing, discharging the circulating liquid completely when replacing each time, and stopping the water pump to cause temporary non-working of the equipment, thereby being unfavorable for waste gas treatment; multiple replacement can result in a large amount of absorbent being simultaneously drained, resulting in wasted medicament.
Therefore, the research and development design of the efficient multistage absorption tower can treat waste gas pollutants more efficiently, and meanwhile, the accurate self-regulation can be effectively realized according to working conditions, so that all the operating conditions are met; in addition, through design improvement and control perfection, the absorption tower can also keep high efficiency when changing liquid and simultaneously not cause the waste of absorption liquid, is an important direction of research and development of the person skilled in the art.
Disclosure of Invention
In order to solve the technical problems, the utility model designs a high-efficiency multistage absorption tower.
The utility model adopts the following technical scheme:
the utility model provides a high-efficient multistage absorption tower, includes medicament jar, dosing system, fresh water tank, new liquid system, circulating fluid system and absorption tower system, absorption tower system includes tower body, air current equipartition board, filler, circulating fluid spray layer, new liquid spray layer and defroster, and the medicament jar passes through dosing system and divides two ways to communicate new liquid system and tower body respectively, fresh water tank intercommunication new liquid system, new liquid system intercommunication new liquid spray layer, circulating fluid system intercommunication tower body bottom and circulating fluid spray layer.
Preferably, the lower part of the tower body is provided with an exhaust gas inlet, the top of the tower body is provided with an exhaust gas outlet, and the air flow uniformly-distributed plate, the filler, the circulating liquid spraying layer, the new liquid spraying layer and the demister are sequentially distributed in the tower body from bottom to top.
Preferably, the dosing system consists of a dosing pump, a stop valve, a safety valve, an electric valve and an instrument, wherein a pipeline of the dosing system is divided into two paths, one path is connected to a pipeline of a new liquid system, the other path is connected to the inside of the absorption tower system, and switching can be realized through the electric valve.
Preferably, the new liquid system consists of a new liquid pump and a valve, an inlet of the new liquid pump is connected with the clear water tank, and a pipeline of the dosing system is connected to an inlet pipeline of the new liquid.
Preferably, the circulating liquid system consists of a circulating pump and a valve, wherein an inlet of the circulating pump is connected with the bottom of the tower body, and circulating liquid is extracted from the absorption tower and is conveyed to the circulating liquid spraying layer through one or more pipelines.
Preferably, the exhaust gas inlet is arranged obliquely downwards, and the included angle between the oblique direction and the horizontal direction is 10-15 degrees.
Preferably, the tower body is provided with a water supplementing port, an absorbing liquid supplementing port, a sampling port, a PH meter interface and a plurality of manhole doors.
Preferably, the circulating liquid spraying layer consists of a pipe and a nozzle, a spiral nozzle is adopted, and a suction-insertion type connection mode is adopted between the circulating liquid spraying layer and the tower body.
Preferably, the new liquid spraying layer consists of a pipe and a nozzle, a solid spraying nozzle is adopted, and a drawing-inserting type connection mode is adopted between the new liquid spraying layer and the tower body.
Preferably, the high-efficiency multistage absorption tower further comprises a control system, and the control system is used for controlling and communicating the dosing system, the new liquid system and the circulating liquid system.
The beneficial effects of the utility model are as follows:
(1) The exhaust gas inlet of the absorption tower is arranged at a certain angle, and the air flow uniformly-distributed plate is designed, so that the exhaust gas flow is more uniform, and the absorption efficiency is improved;
(2) The absorption tower is divided into a spray mode of combining circulating liquid spray and new liquid spray, the circulating liquid spray is matched with filler, so that the absorption effect of circulating absorption liquid can be effectively achieved, and a spiral nozzle is adopted, so that the nozzle is not easy to be blocked; the new liquid adopts a solid spray nozzle, the sprayed liquid drops have better atomization degree and high absorption efficiency, and the filling material is not needed to be assisted, so that the usage amount of the filling material can be reduced;
(3) The utility model controls the dosing flow through the instrument linkage, thereby controlling the concentration of the absorption liquid, improving the utilization rate of the absorption liquid, effectively reducing the waste of the absorption liquid caused by liquid replacement and effectively reducing the running cost;
(4) The spraying layer is designed into a drawing-inserting type structure, so that on-line maintenance can be realized, shutdown is not needed, and the device is more convenient;
(5) The utility model solves the problems of liquid exchange and waste of the absorption liquid, does not need to stop the pump when the liquid is exchanged, and can not influence the absorption efficiency of the absorption tower because the absorption liquid is not completely exchanged;
(6) The utility model can realize accurate control according to different working conditions, is also provided with an economic operation mode, can better adapt to various production conditions, meets all working conditions, and strictly controls emission indexes and operation cost.
Drawings
FIG. 1 is a schematic view of a construction of the present utility model;
FIG. 2 is a schematic diagram of an absorber system in accordance with the present utility model;
FIG. 3 is a schematic view of a structure of a circulating liquid spray layer according to the present utility model;
FIG. 4 is a schematic view of an installation structure of the circulating liquid spray layer and the fresh liquid spray layer in the present utility model;
FIG. 5 is a schematic view of a structure of a new liquid spray layer according to the present utility model;
in the figure: 1. the chemical tank, 2, the medicine adding system, 3, the clear water tank, 4, the new liquid system, 5, the circulating liquid system, 6, the absorption tower system, 7, the control system, 2.1, the tower body, 2.2, the air flow even distribution plate, 2.3, the filler, 2.4, the circulating liquid spray layer, 2.5, the new liquid spray layer, 2.6, the defroster.
Description of the embodiments
The technical scheme of the utility model is further specifically described by the following specific embodiments with reference to the accompanying drawings:
examples: as shown in fig. 1, a high-efficiency multistage absorption tower comprises a medicament tank 1, a medicament adding system 2, a clear water tank 3, a new liquid system 4, a circulating liquid system 5, an absorption tower system 6 and a control system 7.
The medicine tank 1 is used for storing high-concentration absorption liquid, and the absorption liquid can be supplemented to the new liquid system 4 and the absorption tower system 6 through the medicine adding system 2.
The dosing system 2 consists of a dosing pump, a stop valve, a safety valve, an electric valve and an instrument, wherein a dosing system pipeline is divided into two paths, one path is connected to a new liquid pump inlet pipeline of the new liquid system 4, the other path is connected to the absorption tower system 6, and switching can be realized through the electric valve. Wherein the dosing system 2 can control the operation state of the dosing pump by the control system 7 through constant flow and PH value feedback according to the flue gas condition and the operation state of the combined absorption tower. The dosing system 2 can be switched by an electric valve to independently dose the drug to the new liquid system 4 or the absorption tower system 6, and can also dose the drug to the new liquid system 4 and the absorption tower system 6 at the same time.
The clean water tank 3 is used for storing clean water, and the clean water can be reclaimed water or soft water, and soft water is better, and spray water is provided for the new liquid system 4. Can be used together with the dosing system 2 to provide the new liquid system 4 with the absorption liquid with the required concentration.
The new liquid system 4 consists of a new liquid pump, a valve and the like, an inlet of the new liquid pump is connected with the clean water tank 3, and a pipeline of the dosing system 2 is connected to an inlet pipeline of the new liquid pump, and the main function of the dosing system is to provide fresh absorption liquid for the absorption tower system 6. The fresh liquid pump pumps water from the fresh water tank 3, the dosing system 2 pumps quantitative absorption liquid before the fresh liquid pump through the dosing pump, the fresh water and the absorption liquid are uniformly mixed after passing through an impeller of the fresh liquid pump, the absorption liquid with a certain concentration is formed, and the absorption liquid is conveyed to a fresh liquid spraying layer of the absorption tower system 6.
The circulating liquid system 5 consists of a circulating pump, a valve and the like, an inlet of the circulating pump is connected with the absorption tower system 6, circulating liquid is pumped from the absorption tower and is conveyed to the circulating liquid spraying layer through one path or multiple paths of pipelines, the number of spraying layers can be controlled through an electric valve, and more working conditions can be adapted.
The absorption tower system 6, as shown in figure 2, mainly comprises six parts of a tower body 2.1, an air flow uniformly-distributed plate 2.2, a filler 2.3, a circulating liquid spraying layer 2.4, a new liquid spraying layer 2.5 and a demister 2.6. The new liquid spraying layer and the circulating liquid spraying layer are mainly used for spraying the absorbing liquid to absorb and remove pollutants in the waste gas, so that the purpose of purifying the waste gas is realized.
The tower body 2.1 is a support of the whole system, is internally provided with a filler support, a demister support, a spray pipe support and the like, and is provided with a plurality of connectors, wherein a is an exhaust gas inlet, and the angle between the exhaust gas inlet and the horizontal is 10-15 degrees, so that the uniformity of exhaust gas flow is facilitated; b is an exhaust gas outlet, and the exhaust gas is discharged from the exhaust gas outlet after being purified by the absorption tower and being reduced; c is a circulating liquid water outlet which is connected with a pump of the 5 circulating liquid system; d1 is a circulating liquid spray pipe interface which is connected with a 5 circulating liquid system pipeline; d2 is a new liquid spray pipe interface which is connected with a new liquid system pipeline 4; e is a water supplementing port, and new water is supplemented for the 6 absorption tower system; f is an absorption liquid supplementing port, and new absorption liquid is supplemented for the 6 absorption tower system; g is a sewage outlet, and the waste liquid of the 6 absorption tower system is discharged out of the system from the sewage outlet; i is a sampling port used for sampling and detecting circulating liquid of the 6 absorption tower system; j is a PH meter interface used for connecting a PH meter; k1, k2, k3 are manhole doors (mirrors) through which the operating condition of the tower can be observed, from which the tower can be accessed for service when it fails.
Nozzle symbol Use of the same
a Exhaust gas inlet
b Exhaust gas outlet
c Circulating liquid outlet
d1 Interface of circulating liquid spray pipe
d2 New liquid spray pipe joint
e Water supplementing port
f Liquid absorbing port
g Drain outlet
h Interface of liquid level meter
i Sampling port
j PH meter interface
k1 Manhole door (view mirror)
K2 Manhole door (view mirror)
K3 Manhole door (view mirror)
The air flow uniformly-distributed plate 2.2 can be in the form of a pore plate or a trough plate with a certain aperture ratio and is used for uniformly distributing waste gas flow, thereby being beneficial to improving the absorption efficiency of the absorption tower.
There are a number of forms of filler 2.3: pall ring, step ring, PP ball etc. select the form of packing according to different operating modes, support through the grid and arrange in the tower. The function is to increase the contact surface of gas and liquid, improve the mass transfer coefficient, and has large flux and small resistance.
The circulating liquid spraying layer 2.4 is mainly composed of a pipe and a nozzle as shown in fig. 3, adopts a spiral nozzle which is not easy to block, adopts a drawing-inserting type connection mode with the tower body, can realize online maintenance as shown in fig. 4, and does not need to be stopped. The circulating liquid at the bottom of the tower is used for absorbing pollutants in the waste gas, and the circulating utilization of the absorbing liquid is realized through the circulating liquid system 5, so that the utilization rate of the absorbent is improved.
The new liquid spraying layer 2.5 is mainly composed of a pipe and a nozzle as shown in fig. 5, a solid spraying nozzle with better atomization degree is adopted, and a drawing-inserting type connection mode is adopted between the new liquid spraying layer and the tower body, as shown in fig. 4, on-line maintenance can be realized, and no shutdown is needed. The absorption liquid which is proportioned by the new liquid system 4 is used for absorbing pollutants in waste gas, the gas-liquid contact can be more sufficient by the atomizing nozzle, and compared with the circulating liquid, the concentration of the absorbent is higher by using the new liquid, and the absorption effect is better.
The demister 2.6 is used for removing water vapor in the waste gas and ensuring the normal operation of the back-end equipment.
The control system 7 is used as a control center of the whole system, and is used for intelligently controlling the normal operation of each device, ensuring the purification efficiency of the system, reducing the usage amount of the absorbent of the system and reducing the operation cost.
The high-efficiency multistage absorption tower is used for purifying waste gas. The absorption tower system adopts a multi-stage form, the lower spraying layer is a circulating liquid spraying layer, the absorption liquid in the tower is recycled through the circulating liquid system and sprayed into the tower through the spiral spraying nozzle, the upper spraying layer is a new liquid spraying layer, water and quantitative medicament are mixed through the new liquid system and then conveyed to the new liquid spraying layer, and the new liquid is sprayed into the tower through the solid spraying nozzle.
Waste gas gets into the angle design that the absorption tower passed through the import through the waste gas entry of absorption tower, waste gas in the entering tower can the downstream before rising earlier, avoid directly dashing the opposite, cause the air current equipartition very poor, the air current equipartition board of rethread arrangement in the import top makes waste gas more even, then get into the filler district, fully contact with the absorption liquid, absorb, waste gas after preliminary purification enters into the upper spray district, further absorption desorption pollutant by the absorption liquid of high concentration, waste gas gets into the defroster after further purification, get into rear end equipment after the drop of desorption carry is discharged through the export.
Control instruction for the use of the efficient multistage absorption tower:
(1) The medicine tank is used for judging whether the absorbent needs to be supplemented or not through liquid level display.
(2) The clear water tank is controlled to supplement water through the liquid level PID linkage, so that the liquid level is maintained at a certain height, and the spraying water is ensured;
(3) The circulating liquid in the tower is subjected to liquid level linkage control to supplement water, the low liquid level starts to supplement water, the high liquid level stops to supplement water, the waste liquid is discharged after the circulating period of the circulating liquid is reached, new liquid is supplemented, and the pump is not required to be stopped under the logic;
(4) Concentration of absorption liquid: the concentration of the circulating liquid is controlled to be very low (the PH value is about 7), and the circulating liquid is close to water, so that waste is easily caused when the concentration is too high for discharging liquid; the concentration of the new liquid is preferably 0.01% -1%, the new liquid is controlled in a linkage mode according to working conditions, the concentration is too low, the absorption effect is poor, and equipment failure problems such as crystallization, corrosion and the like are easily caused by too high concentration.
(5) And the dosing system is used for controlling start and stop according to the linkage of the system outlet waste gas pollutant detection instrument, and controlling the flow of the dosing pump and the working form of the dosing system by PID. When the concentration of pollutants in the waste gas fed back by the instrument is reduced, the operation flow of the dosing system is reduced in a linkage manner, and otherwise, the flow is increased. When the concentration of the new liquid reaches 1%, the concentration of the pollutant still shows an ascending trend, an emergency mode is started, a valve for supplementing the absorption liquid at the absorption tower is opened, and the peak working condition is dealt with by adding the absorption liquid into the circulating liquid.
(6) Economic mode of operation: when the working condition is changed, the concentration of pollutants in the waste gas can be kept at a very low level continuously in a certain period of time, and the dosing system is stopped on the premise that the outlet emission reaches the standard, and the new liquid system only provides clear water, and even in extreme cases, the new liquid system can stop running.
The above-described embodiment is only a preferred embodiment of the present utility model, and is not limited in any way, and other variations and modifications may be made without departing from the technical aspects set forth in the claims.

Claims (10)

1. The utility model provides a high-efficient multistage absorption tower, its characterized in that includes medicament jar, dosing system, fresh water tank, new liquid system, circulating fluid system and absorption tower system, absorption tower system includes tower body, air current equipartition board, filler, circulating fluid spray layer, new liquid spray layer and defroster, and the medicament jar divides two ways to communicate new liquid system and tower body respectively through dosing system, fresh water tank intercommunication new liquid system, new liquid system intercommunication new liquid spray layer, circulating fluid system intercommunication tower body bottom and circulating fluid spray layer.
2. The efficient multistage absorption tower according to claim 1, wherein the lower part of the tower body is provided with an exhaust gas inlet, the top of the tower body is provided with an exhaust gas outlet, and the air flow uniformly-distributed plate, the filler, the circulating liquid spraying layer, the new liquid spraying layer and the demister are sequentially distributed in the tower body from bottom to top.
3. The efficient multistage absorption tower according to claim 1, wherein the dosing system consists of a dosing pump, a stop valve, a safety valve, an electric valve and an instrument, the pipeline of the dosing system is divided into two paths, one path is connected to the pipeline of the new liquid system, the other path is connected to the absorption tower system, and switching can be realized through the electric valve.
4. The efficient multi-stage absorption tower according to claim 1, wherein the new liquid system is composed of a new liquid pump and a valve, an inlet of the new liquid pump is connected with the clean water tank, and a pipeline of the dosing system is connected to an inlet pipeline of the new liquid.
5. The efficient multistage absorption tower according to claim 1, wherein the circulating liquid system comprises a circulating pump and a valve, an inlet of the circulating pump is connected with the bottom of the tower body, circulating liquid is extracted from the absorption tower, and the circulating liquid is conveyed to the circulating liquid spraying layer through one or more pipelines.
6. A high efficiency multistage absorption tower according to claim 2, wherein the exhaust gas inlet is disposed obliquely downward, and the angle between the oblique direction and the horizontal direction is 10-15 °.
7. The efficient multistage absorption tower according to claim 1, wherein the tower body is provided with a water supplementing port, an absorption liquid supplementing port, a sampling port, a PH meter port and a plurality of manhole doors.
8. The efficient multistage absorption tower according to claim 1, wherein the circulating liquid spraying layer consists of a pipe and a nozzle, and a spiral nozzle and a tower body are connected in a drawing-inserting mode.
9. The efficient multistage absorption tower according to claim 1, wherein the new liquid spraying layer consists of a pipe and a nozzle, and a solid spray nozzle is adopted, and a suction-plug type connection mode is adopted between the new liquid spraying layer and the tower body.
10. The efficient multi-stage absorber of claim 1, further comprising a control system that controls communication of the dosing system, the fresh liquid system, and the circulating liquid system.
CN202320723758.2U 2023-04-04 2023-04-04 High-efficient multistage absorption tower Active CN219722412U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202320723758.2U CN219722412U (en) 2023-04-04 2023-04-04 High-efficient multistage absorption tower

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202320723758.2U CN219722412U (en) 2023-04-04 2023-04-04 High-efficient multistage absorption tower

Publications (1)

Publication Number Publication Date
CN219722412U true CN219722412U (en) 2023-09-22

Family

ID=88060072

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202320723758.2U Active CN219722412U (en) 2023-04-04 2023-04-04 High-efficient multistage absorption tower

Country Status (1)

Country Link
CN (1) CN219722412U (en)

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