Multi-stage spraying system

Abstract

The utility model relates to the technical field of environmental protection equipment, and provides a multi-stage spraying system which comprises at least two tower bodies, an exhaust unit, a water circulation unit and a control unit, air outlets are formed in the upper portions of the tower bodies, and air inlets are formed in the lower portions of the tower bodies; the gas outlet of the previous stage of tower body is communicated with the gas inlet of the next stage of tower body; the gas outlets of all the tower bodies are independently communicated with the exhaust unit and are used for exhausting tail gas; the tower body comprises at least two spray towers which are communicated in sequence, and the spray towers are detachably and vertically arranged; the water circulation unit is independently communicated with each spray tower and is used for providing spray water; and the control unit is used for controlling the tower body of the previous stage to be communicated with the tower body of the next stage or to be directly communicated with the exhaust unit. According to the multi-stage spraying system, tail gas can be purified in a multi-stage mode, each stage of spraying tower used for spraying is designed in a modularized mode, meanwhile, all tower bodies can be controlled to be communicated or not, and the effective utilization rate of the spraying towers is increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to environmental protection equipment technical field, concretely is a multistage spraying system. BACKGROUND

[0002] In the target material preparation industry, powder metallurgy, sputtering coating and other processes are involved, and a large amount of acidic gas, alkaline gas, dust and metal particulate matter will be produced in the production process. If these pollutants are directly discharged, it will cause serious harm to the environment and human health. As a key waste gas treatment equipment, the spray tower can effectively remove various pollutants, and the absorption liquid can be flexibly selected according to the composition of the waste gas; it has the characteristics of simple structure, convenient operation, low running cost, etc., so it is widely used in the target material preparation industry. The working principle of the spray tower is based on gas-liquid mass transfer. By fully contacting the waste gas with the absorption liquid, the absorption, neutralization or dissolution of pollutants is realized, and the purpose of purifying the waste gas is finally achieved.

[0003] CN215539738U discloses a multistage series spray washing tower treatment system, including control unit, multiple washing towers, raw liquid storage tank, waste liquid tank, circulating liquid concentration detector and multiple circulating liquid pipes. Among them, the inlet end of the circulating liquid pipe is communicated with the washing tower of the next installation position, and the outlet end is communicated with the washing tower of the previous installation position. A liquid pump is arranged on each circulating liquid pipe; the washing tower located at the first installation position is communicated with the waste liquid tank through the circulating liquid discharge pipe with the discharge pump, and the washing tower located at the last installation position is communicated with the raw liquid storage tank through the circulating liquid inlet pipe with the inlet pump. The circulating liquid concentration detector, the inlet pump, the discharge pump and the multiple liquid pumps are connected with the control unit. The spray treatment system disclosed in the above patent document improves the purification effect by setting multiple communicating washing towers. The spray treatment system has a single use mode, which mainly reflects that the number of spray towers cannot be adjusted according to the actual tail gas conditions, resulting in ineffective operation of the spray system. Secondly, since the multiple washing towers are connected in series through exposed pipelines, there are problems of large occupied area and easy corrosion of the pipelines in actual application.

[0004] Based on this, the technical problem solved by the present case is: how to optimize the design of the spray system to overcome the existing defects. INVENTION CONTENTS

[0005] To solve the above technical problems, the utility model provides a multistage spraying system, which can not only purify tail gas in multiple stages, but also use modular design for the spray towers used for spraying at each stage. This not only reduces the occupied area of the entire system, but also controls whether each tower body is connected, thereby improving the effective utilization rate of the spray tower and reducing resource waste. In addition, by connecting the tower bodies at each stage with the protection shell and arranging the connected pipelines and lines in the protection shell, the pipelines are prevented from being exposed, thereby prolonging the service life and preventing tail gas leakage due to pipeline damage.

[0006] The technical scheme of the utility model is:

[0007] A multi-stage spraying system, comprising at least two tower bodies, an exhaust unit, a water circulation unit and a control unit, the upper part of the tower body is provided with an air outlet, and the lower part of the tower body is provided with an air inlet; the air outlet of the upper-stage tower body is in communication with the air inlet of the lower-stage tower body; the air outlets of all the tower bodies are individually in communication with the exhaust unit and are used for discharging tail gas; the tower body comprises at least two spraying towers which are in communication in sequence and are vertically arranged in a detachable mode; the water circulation unit is individually in communication with each spraying tower and is used for providing spraying water; and the control unit is used for controlling the communication between the upper-stage tower body and the lower-stage tower body or the direct communication between the upper-stage tower body and the exhaust unit.

[0008] In the multi-stage spraying system, the tower bodies are two, comprising a first tower body and a second tower body;

[0009] The first tower body comprises a first-stage spraying tower and a second-stage spraying tower which are in communication and are vertically arranged in a detachable mode; the first-stage spraying tower is provided with a first air inlet; and the second-stage spraying tower is provided with a first air outlet;

[0010] The second tower body comprises a third-stage spraying tower and a fourth-stage spraying tower which are in communication and are vertically arranged in a detachable mode; the third-stage spraying tower is provided with a second air inlet; and the fourth-stage spraying tower is provided with a second air outlet;

[0011] The first air inlet is in communication with an external blowdown chamber; the first air outlet is in communication with the second air inlet; and the first air outlet and the second air outlet are individually in communication with the exhaust unit.

[0012] In the multi-stage spraying system, the water circulation unit comprises a water tank and a circulating water pump; the circulating water pump comprises a first pump body, a second pump body, a third pump body and a fourth pump body which are in communication connection with the control unit; one end of the first pump body, the second pump body, the third pump body and the fourth pump body is in communication with the water tank pipeline, and the other end thereof is respectively in communication with the pipeline of the first-stage spraying tower, the second-stage spraying tower, the third-stage spraying tower and the fourth-stage spraying tower and is used for providing spraying water.

[0013] In the multi-stage spraying system, a sewage treatment unit is further included, the sewage treatment unit comprises a sewage pump and a sewage storage tank; the sewage storage tank is in communication with the water tank pipeline and draws the circulating water in the water tank through the sewage pump.

[0014] In the multi-stage spraying system, the sewage treatment unit further comprises an emptying pipeline.

[0015] In the multi-stage spraying system, the exhaust unit comprises a chimney and a fan for air extraction; the chimney is individually in communication with the air outlets of all the tower bodies.

[0016] In the multi-stage spraying system, the first-stage spraying tower, the second-stage spraying tower, the third-stage spraying tower and the fourth-stage spraying tower have the same structure and each comprises a first filler layer, a first spraying layer, a second filler layer and a second spraying layer.

[0017] In the multi-stage spraying system, the tower body is provided with an observation window.

[0018] In the multi-stage spraying system, the outer side of the tower body is provided with a protective shell; the protective shell is connected to one side of the tower body and used for arranging and shielding pipelines; the protective shells between adjacent tower bodies are connected to each other.

[0019] In the multi-stage spraying system, a valve unit is further included; the valve unit comprises a plurality of control valves which are in communication connection with the control unit; the gas outlets of all the tower bodies are provided with the control valves, and the control valves are used for controlling the communication between the tower body of the upper stage and the tower body of the lower stage or the direct communication between the tower body and the exhaust unit.

[0020] The above technical solution in the utility model has at least one of the following advantages or beneficial effects:

[0021] The multi-stage spraying system can not only purify tail gas in multiple stages, but also adopt flexible modular design for the spraying towers used for spraying at different stages, so that the land occupation of the whole system is reduced during installation, and the number of spraying towers can be selected according to the concentration of tail gas; in addition, according to actual production conditions, the system can also control whether the tower bodies are communicated to control the spraying frequency, so as to improve the effective utilization rate of the spraying towers and reduce resource loss. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a working schematic view of embodiment 1 of the utility model;

[0023] Figure 2 It is a top view installation schematic view of the first tower body and the second tower body of embodiment 1 of the utility model.

[0024] The correspondence of the reference numerals in the drawings is as follows:

[0025] The first tower body 1; the second tower body 2; the protective shell 12; the side plate 121; the connecting plate 122; the top plate 123; the cavity a; the chimney 3; the water tank 4; the first pump body 401; the second pump body 402; the third pump body 403; the fourth pump body 404; the sewage treatment unit 5; the sewage pump 51; the sewage storage tank 52; the emptying pipeline 53; the fan 6; the observation window 7; the control unit 8; the first-stage spraying tower 101; the second-stage spraying tower 102; the third-stage spraying tower 103; the fourth-stage spraying tower 104; the first filler layer 1a; the first spraying layer 1b; the second filler layer 2a; the second spraying layer 2b. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be apparently and completely described in combination with the drawings of the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor belong to the protection scope of the utility model.

[0027] Embodiment 1

[0028] Reference Figure 1 、 2 A multi-stage spraying system, comprising an exhaust unit, a water circulation unit, a control unit 8 and two tower bodies arranged side by side, respectively a first tower body 1 and a second tower body 2; the first tower body 1 comprises a first-stage spraying tower 101 and a second-stage spraying tower 102 in communication, and the first-stage spraying tower 101 and the second-stage spraying tower 102 are arranged vertically and detachably; the first-stage spraying tower 101 is provided with a first air inlet; the second-stage spraying tower 102 is provided with a first air outlet; the second tower body 2 comprises a third-stage spraying tower 103 and a fourth-stage spraying tower 104 in communication, and the third-stage spraying tower 103 and the fourth-stage spraying tower 104 are arranged vertically and detachably; the third-stage spraying tower 103 is provided with a second air inlet; the fourth-stage spraying tower 104 is provided with a second air outlet; the first air inlet is in communication with an externally provided blowdown chamber; the first air outlet is in communication with the second air inlet; the first air outlet and the second air outlet are both in separate communication with the exhaust unit. The water circulation unit is in separate communication with the first-stage spraying tower 101, the second-stage spraying tower 102, the third-stage spraying tower 103 and the fourth-stage spraying tower 104 and is used for providing spraying water; the control unit 8 is used for controlling the first tower body 1 to be in communication with the second tower body 2 or to be directly in communication with the exhaust unit.

[0029] In actual application, the spraying pipelines of the first-stage spraying tower 101, the second-stage spraying tower 102, the third-stage spraying tower 103 and the fourth-stage spraying tower 104 can all work independently, and then the start and stop of the first-stage spraying tower 101, the second-stage spraying tower 102, the third-stage spraying tower 103 and the fourth-stage spraying tower 104 in the spraying system can be automatically adjusted through the control unit 8 in combination with a flue gas concentration detector, so that one-stage, two-stage, three-stage or four-stage spraying is selected to achieve efficient dust removal. It should be noted that in actual application, a valve unit is also included, and a three-way valve is arranged at each of the first air outlet and the second air outlet; the three-way valve is in communication connection with the control unit 8 and is used for controlling the three-way valve (not shown in the figure) to control the first tower body 1 to be in communication with the second tower body 2 or to be directly in communication with the exhaust unit.

[0030] It should be noted that when installed, the top of the tower body needs to be closed by a tower top.

[0031] The multi-stage spraying system of the embodiment can not only purify the tail gas in multiple stages, but also adopt a flexible and modular design for the spraying towers used for spraying in each stage, thereby reducing the floor area of the entire system during installation, and also enabling the number of spraying towers to be selected according to the concentration of the tail gas. In addition, according to the actual production situation, the system can also control whether the first tower body 1 and the second tower body 2 are connected to control the number of spraying, thereby improving the effective utilization rate of the spraying tower and reducing resource loss.

[0032] In actual application, the water circulation unit includes a water tank 4 and a circulating water pump; the circulating water pump includes a first pump body 401, a second pump body 402, a third pump body 403, and a fourth pump body 404 which are in communication connection with the control unit 8; one end of each of the first pump body 401, the second pump body 402, the third pump body 403, and the fourth pump body 404 is in pipeline communication with the water tank 4, and the other end thereof is in pipeline communication with the first-stage spraying tower 101, the second-stage spraying tower 102, the third-stage spraying tower 103, and the fourth-stage spraying tower 104 respectively and is used for providing spraying water. It should be noted that the control unit 8 can also regulate the spraying frequency by detecting the pH value of the water tank 4.

[0033] In the embodiment, a sewage treatment unit 5 is further included, which includes a sewage pump 51, a sewage storage tank 52, and a emptying pipeline 53; the sewage storage tank 52 is in pipeline communication with the water tank 4 and draws the circulating water in the water tank 4 through the sewage pump 51. In actual application, the control unit 8 controls the ball valve to store the sewage in the sewage storage tank 52 for precipitation and purification and then discharges the sewage.

[0034] In actual application, the exhaust unit includes a chimney 3 and a fan 6 for air extraction; the chimney 3 is in separate communication with the gas outlets of each of the spraying towers. Under the action of the fan 6, the tail gas can pass through the first-stage spraying tower 101, the second-stage spraying tower 102, the third-stage spraying tower 103, and the fourth-stage spraying tower 104 in sequence and be discharged from the chimney 3, as shown in FIG. 5. Alternatively, the tail gas directly passes through the first-stage spraying tower 101 and the second-stage spraying tower 102 and is discharged from the chimney 3. Figure 1

[0035] In the embodiment, the first-stage spraying tower 101, the second-stage spraying tower 102, the third-stage spraying tower 103, and the fourth-stage spraying tower 104 have the same structure and each include a first filler layer la, a first spraying layer lb, a second filler layer 2a, and a second spraying layer 2b.

[0036] In order to facilitate the observation of the use of the tower body, the first tower body 1 and the second tower body 2 are each provided with an observation window 7.

[0037] ​In this embodiment, a protective shell 12 is provided on the outer side of the tower body; the protective shell 12 is connected to one side of the tower body and is used to arrange and shield the pipes; the protective shells 12 of adjacent tower bodies are interconnected. Preferably, the protective shell 12 includes two side plates 121 connected to both sides of the tower body, a connecting plate 122 for connecting the two side plates 121, and a top plate 123 for sealing the top; in this preferred embodiment, two independent cavities a are formed between the protective shell 12 and the tower body, one cavity a is used to arrange spray pipes and wiring, and the other cavity a is used to arrange exhaust pipes; the first tower body 1 and the second tower body 2 are detachably fixed by the connecting plate 122. It should be noted that this embodiment does not limit the number of tower bodies.

[0038] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A multi-stage spray system, comprising at least two towers, an exhaust unit, a water circulation unit, and a control unit, characterized in that, The tower body has an air outlet at the top and an air inlet at the bottom; the air outlet of the upper-level tower body is connected to the air inlet of the lower-level tower body; all the air outlets of the tower bodies are individually connected to an exhaust unit and used to discharge exhaust gas; the tower body includes at least two spray towers connected in sequence, and the spray towers are detachably arranged vertically; the water circulation unit is individually connected to each spray tower and used to provide spray water; the control unit is used to control the connection between the upper-level tower body and the lower-level tower body or directly to the exhaust unit.

2. The multi-stage spray system according to claim 1, characterized in that, The tower consists of two parts, including a first tower and a second tower. The first tower body includes a primary spray tower and a secondary spray tower that are connected to each other, and the primary spray tower and the secondary spray tower are detachably arranged vertically; the primary spray tower is provided with a first air inlet; the secondary spray tower is provided with a first air outlet; The second tower body includes a three-stage spray tower and a four-stage spray tower that are connected to each other, and the three-stage spray tower and the four-stage spray tower are detachably arranged vertically; the three-stage spray tower is provided with a second air inlet; the four-stage spray tower is provided with a second air outlet; The first air inlet is connected to the external sewage chamber; the first air outlet is connected to the second air inlet; and both the first and second air outlets are individually connected to the exhaust unit.

3. The multi-stage spray system according to claim 2, characterized in that, The water circulation unit includes a water tank and a circulating water pump; the circulating water pump includes a first pump body, a second pump body, a third pump body, and a fourth pump body that are communicatively connected to the control unit; one end of the first pump body, the second pump body, the third pump body, and the fourth pump body are all connected to the water tank pipeline, and the other end is connected to the pipelines of the first-stage spray tower, the second-stage spray tower, the third-stage spray tower, and the fourth-stage spray tower, respectively, and is used to provide spray water.

4. The multi-stage spray system according to claim 3, characterized in that, It also includes a sewage treatment unit, which includes a sewage pump and a sewage storage tank; the sewage storage tank is connected to a water tank pipeline and the sewage pump draws circulating water from the water tank.

5. The multi-stage spray system according to claim 4, characterized in that, The wastewater treatment unit also includes a drain pipe.

6. The multi-stage spray system according to claim 1, characterized in that, The exhaust unit includes a chimney and a fan for drawing in air; the chimney is individually connected to the air outlet of each of the tower bodies.

7. The multi-stage spray system according to claim 2, characterized in that, The primary, secondary, tertiary, and quaternary spray towers have the same structure and each includes a first filling layer, a first spray layer, a second filling layer, and a second spray layer.

8. The multi-stage spray system according to claim 1, characterized in that, The spray tower is equipped with an observation window.

9. The multi-stage spray system according to claim 1, characterized in that, The outer side of the tower body is provided with a protective shell; the protective shell is connected to one side of the tower body and is used to arrange and shield the pipes; the protective shells between adjacent tower bodies are interconnected.

10. The multi-stage spray system according to claim 1, characterized in that, It also includes a valve unit; the valve unit includes multiple control valves that are communicatively connected to the control unit; all the air outlets of the tower body are equipped with the control valves, which are used to control the connection between the upper-level tower body and the lower-level tower body or to directly connect with the exhaust unit.

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