Water distribution spraying device of cooling tower

Abstract

The utility model relates to a water distribution spraying device of a cooling tower, which comprises an absorption tank, a plurality of groups of cooling absorption towers, a spraying mechanism, an inert gas pipeline, a gas inlet pipe and an exhaust pipe, the inlet end of the water distribution spraying device is arranged on the inner side of the top of each cooling absorption tower, and the outlet end extends out of the top of each cooling absorption tower; the water distribution spraying device of the cooling tower adopts a multi-layer spraying ring pipe structure, and a plurality of water outlet holes are uniformly formed in each group of spraying ring pipes, so that absorption liquid is distributed in a three-dimensional net shape, and the contact area with high-temperature flue gas is greatly increased; meanwhile, a gas-liquid mixed flow can be formed in the spraying process through the combination of the inert gas pipeline and the spraying main pipe, the mass transfer efficiency is further improved, it is ensured that harmful components are fully absorbed, the waste gas purification effect is remarkably improved, in addition, the inert gas can also form a local oxygen-free environment in the cooling absorption tower and the spraying mechanism, and the waste gas purification effect is improved. In this way, electrochemical corrosion of the metal part is inhibited.

Description

Technical Field

[0001] This utility model relates to the field of cooling tower technology, specifically to a cooling tower water distribution spray device. Background Technology

[0002] Industrial production processes often generate large amounts of high-temperature flue gas or waste gas. These gases typically contain dust, acidic components (such as SO2 and NOx), or other pollutants, and direct emission can cause serious harm to the environment. Therefore, processes such as cooling, absorption, and purification are usually required to treat the waste gas in order to meet environmental emission standards.

[0003] Cooling towers are common waste gas treatment equipment. They achieve cooling, dust removal, and absorption of harmful components by directly contacting high-temperature flue gas with a spray absorbent liquid (such as water or alkaline solution). Traditional cooling tower water spraying devices typically use simple spray pipes or nozzles for liquid distribution, but due to the characteristics of high-temperature flue gas, the following technical problems exist:

[0004] (1) Low spraying efficiency: The traditional spraying method has uneven liquid distribution, resulting in insufficient gas-liquid contact and low absorption efficiency. Some high-temperature flue gas may be discharged without sufficient cooling and purification.

[0005] (2) Insufficient gas circulation: Some waste gas may escape directly due to excessive flow rate or insufficient spray coverage, lacking an effective circulation mechanism to improve treatment efficiency.

[0006] (3) High-temperature corrosion and wear: Particulate matter in high-temperature flue gas can easily cause equipment wear, while acidic gases can corrode pipes and spray components, affecting equipment life;

[0007] (4) Insufficient utilization of inert gases: In some processes, it is necessary to introduce inert gases (such as nitrogen) to prevent oxidation or explosion risks, but traditional equipment has failed to effectively combine inert gases with spray systems, resulting in waste of resources;

[0008] To address the aforementioned issues, there is an urgent need for an improved cooling tower water spraying device to enhance gas-liquid contact efficiency, improve waste gas circulation and treatment capabilities, and adapt to harsh operating conditions involving high temperatures, dust, and corrosive gases. Utility Model Content

[0009] The technical problem to be solved by this utility model is to address the shortcomings of the existing technology by providing a cooling tower water spraying device with good circulating cooling effect, capable of secondary circulation treatment, and reducing the degree of corrosion on the inner wall of the tower during the cooling absorption period.

[0010] The technical problem to be solved by this utility model is achieved through the following technical solution: a cooling tower water distribution spray device, which includes;

[0011] An absorption tank is formed inside which an absorbent liquid is contained. Several installation holes are opened at the top of the absorption tank and a drain hole is opened at the bottom of the absorption tank.

[0012] Several sets of cooling absorption towers, the bottom of which extends into the mounting hole, and overlapping protrusions are fixed on the outer circumferential surface of the cooling absorption tower located above the mounting hole, so that the middle part of the cooling absorption tower overlaps on the top edge of the mounting hole.

[0013] The spraying mechanism includes a spraying main pipe, the inlet end of which is located outside the top of the cooling absorption tower, and the outlet end of which extends into the cooling absorption tower. Several spraying pipes are connected to the outer circumferential surface of the outlet end of the spraying main pipe.

[0014] An inert gas pipeline has its inlet end located on the top outside of the cooling absorption tower, and its outlet end connected to the inner wall of the spray header between the inlet and outlet ends.

[0015] The air inlet pipe has its inlet end located on the outside of the bottom of the cooling absorption tower and its outlet end extending into the bottom of the cooling absorption tower.

[0016] The exhaust pipe has its inlet end located inside the top of the cooling absorption tower and its outlet end extending outside the top of the cooling absorption tower.

[0017] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the cooling tower water distribution spray device described above, wherein the spray pipe is a spray ring pipe, and four sets of spray ring pipes are arranged at intervals above and below, and each set of spray ring pipes is provided with several water outlet holes.

[0018] The technical problem to be solved by this utility model can also be achieved by the following technical solution: the cooling tower water distribution spray device described above also includes a circulation pipe. One end of the circulation pipe is connected to the outer circumferential surface of the exhaust pipe, and the other end passes through the absorption tank and extends to the bottom of the absorption tank and is located directly below one of the cooling absorption towers. A three-way valve is installed at the connection between the circulation pipe and the exhaust pipe, and a fan is installed in the middle of the circulation pipe to selectively draw the gas in the exhaust pipe to the bottom of the absorption tank.

[0019] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the cooling tower water spray device described above, wherein the fan is a high-temperature flue gas circulation fan.

[0020] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the cooling tower water distribution spray device described above, wherein the number of cooling absorption towers and installation holes are set in a one-to-one correspondence.

[0021] Compared with the prior art, the beneficial technical effects of this utility model are:

[0022] (1) The cooling tower water distribution spray device adopts a multi-layer spray ring pipe structure, and multiple water outlet holes are evenly opened on each group of spray ring pipes, so that the absorbent liquid is distributed in a three-dimensional network, which greatly increases the contact area with high temperature flue gas; at the same time, the combination of inert gas pipeline and spray main pipe can form gas-liquid mixed flow during the spraying process, further improving mass transfer efficiency, ensuring that harmful components are fully absorbed, significantly improving the waste gas purification effect; in addition, inert gas can also create a local oxygen-free environment inside the cooling absorption tower and spray mechanism, thereby inhibiting the electrochemical corrosion of metal parts.

[0023] (2) By adding a circulation pipe and a high-temperature flue gas circulation fan, and with the flexible control of the three-way valve, the untreated flue gas can be reintroduced into the bottom of the absorption tank for secondary treatment. This design not only improves the efficiency of waste gas treatment and reduces the escape of pollutants, but also adjusts the circulation ratio according to the actual working conditions, optimizes the system energy consumption while ensuring that emissions meet the standards, and achieves energy-saving and environmentally friendly operation. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the main structure of this utility model.

[0025] Figure label:

[0026] 1. Absorption tank; 2. Mounting hole; 3. Liquid inlet hole; 4. Liquid outlet hole; 5. Cooling absorption tower; 6. Overlapping boss; 7. Spray header; 8. Spray pipe; 9. Inert gas pipeline; 10. Air inlet pipe; 11. Exhaust pipe; 12. Three-way valve; 13. Fan. Detailed Implementation

[0027] The specific technical solutions of this utility model are further described below with reference to the accompanying drawings, so as to enable those skilled in the art to further understand this utility model, without constituting a limitation on its rights.

[0028] Example 1, referring to Figure 1 A cooling tower water distribution spray device, comprising:

[0029] Absorption tank 1 is formed into a roughly square tank structure, and its interior forms a space for containing absorbent liquid. Several mounting holes 2 are opened on the top of the absorption tank 1. The mounting holes 2 are circular through holes. A drain hole is opened at the bottom of the absorption tank 1, and a liquid inlet hole 3 can be opened at the top. The drain hole 4 is used to discharge liquid, which can be water. A valve body can be configured according to the usage requirements.

[0030] To improve the overall processing efficiency of the device, we use multiple sets of cooling absorption towers 5, which are roughly cylindrical in shape and extend into the mounting holes 2 at their bottom ends. The number of cooling absorption towers 5 and mounting holes 2 are arranged in a one-to-one correspondence. The outer circumferential surface of the cooling absorption tower 5 located above the mounting holes 2 is fixed with overlapping protrusions 6, which are roughly circular in shape, so that the middle part of the cooling absorption tower 5 can overlap the top edge of the mounting hole 2.

[0031] To improve the cooling effect of the cooling absorption tower 5, a spraying mechanism was added, which includes a spray header 7, which is roughly a pipe structure. The inlet end of the spray header 7 is located outside the top of the cooling absorption tower 5, and its outlet end extends into the cooling absorption tower 5. Several spray pipes 8 are connected to the outer circumference of the outlet end of the spray header 7. The number of spray pipes 8 can be selected according to the usage requirements. The spray pipes 8 are spray ring pipes, and the diameter of the spray ring pipes can be selected according to the usage requirements. There are four sets of spray ring pipes arranged at intervals. The spacing between two adjacent sets of spray ring pipes can be selected according to the usage requirements. Several water outlet holes are opened on each set of spray ring pipes.

[0032] The inert gas pipeline 9 has its inlet end located on the top outside of the cooling absorption tower 5, and its outlet end connected to the inner wall of the spray header 7 between the inlet and outlet ends. It can be supplied with gas from an external inert gas source, such as nitrogen.

[0033] The air inlet pipe 10 is horizontally positioned, with its inlet end located on the outside of the bottom of the cooling absorption tower 5 and its outlet end extending into the bottom of the cooling absorption tower 5.

[0034] The exhaust pipe 11 has its inlet end located inside the top of the cooling absorption tower 5 and its outlet end extending outside the top of the cooling absorption tower 5.

[0035] When multiple spray absorptions of gas are required, circulation treatment can be performed, which also includes a circulation pipe. One end of the circulation pipe is connected to the outer circumference of the exhaust pipe 11, and the other end passes through the absorption tank 1 and extends to the bottom of the absorption tank 1 and is located directly below one of the cooling absorption towers 5. A three-way valve 12 is installed at the connection between the circulation pipe and the exhaust pipe 11 to switch the airflow direction according to the usage requirements. A fan 13 is installed in the middle of the circulation pipe. In order to avoid damage to the fan 13 by particles in the gas, we select a fan 13 that can be used under harsh conditions. The fan 13 is a high-temperature flue gas circulation fan 13, which selectively draws the gas in the exhaust pipe 11 to the bottom of the absorption tank 1.

[0036] The cooling tower water spray device in Example 1 is used as follows:

[0037] (1) Preparation before starting the device: Connect the external nitrogen source to the inert gas pipeline 9, and inject the absorbent liquid, such as water or a specific chemical solution, through the liquid inlet 3 at the top of the absorption tank 1. The liquid level should cover the bottom of the cooling absorption tower 5, but not exceed the height of the overlapping boss 6.

[0038] (2) Gas treatment process: The gas to be treated, such as industrial waste gas, enters the bottom of the cooling absorption tower 5 from the inlet pipe 10 and flows upward. The spray mechanism is started, and the liquid enters from the spray header pipe 7. It forms a uniform water curtain through the water outlet of the spray ring pipe and comes into countercurrent contact with the rising gas. Inert gas is injected into the spray header pipe 7 at the same time. After mixing with the liquid, it forms microbubble atomization spray, which enhances the gas-liquid mass transfer efficiency. At the same time, it creates a local oxygen-free environment inside the cooling absorption tower 5 and the spray mechanism, thereby inhibiting the electrochemical corrosion of metal parts. During the process of the gas rising in the tower, it comes into full contact with the water mist of the multi-layer spray ring pipe to achieve cooling, dust removal and absorption of harmful components, such as acidic gas dissolving in water.

[0039] (3) Gas discharge or circulation: The staff adjusts the three-way valve 12 so that the exhaust pipe 11 directly discharges the purified gas. When circulation is required, the staff switches the three-way valve 12 so that the gas returns to the bottom of the absorption tank 1 through the circulation pipe. At the same time, the high-temperature flue gas circulation fan 13 is started to push the gas smoothly into the bottom of the tank. After a certain period of circulation, it is ready.

Claims

1. A cooling tower water distribution spray device, characterized in that: It includes; An absorption tank is formed inside which an absorbent liquid is contained. Several installation holes are opened at the top of the absorption tank and a drain hole is opened at the bottom of the absorption tank. Several sets of cooling absorption towers, the bottom of which extends into the mounting hole, and overlapping protrusions are fixed on the outer circumferential surface of the cooling absorption tower located above the mounting hole, so that the middle part of the cooling absorption tower overlaps on the top edge of the mounting hole. The spraying mechanism includes a spraying main pipe, the inlet end of which is located outside the top of the cooling absorption tower, and the outlet end of which extends into the cooling absorption tower. Several spraying pipes are connected to the outer circumferential surface of the outlet end of the spraying main pipe. An inert gas pipeline has its inlet end located on the top outside of the cooling absorption tower, and its outlet end connected to the inner wall of the spray header between the inlet and outlet ends. The air inlet pipe has its inlet end located on the outside of the bottom of the cooling absorption tower and its outlet end extending into the bottom of the cooling absorption tower. The exhaust pipe has its inlet end located inside the top of the cooling absorption tower and its outlet end extending outside the top of the cooling absorption tower.

2. The cooling tower water distribution spray device according to claim 1, characterized in that: The spray pipe is a spray ring pipe, and four sets of spray ring pipes are arranged at intervals on the top and bottom. Each set of spray ring pipes has several water outlet holes.

3. The cooling tower water distribution spray device according to claim 1, characterized in that: It also includes a circulation pipe, one end of which is connected to the outer circumference of the exhaust pipe, and the other end extends through the absorption tank to the bottom of the absorption tank and is located directly below one of the cooling absorption towers. A three-way valve is installed at the connection between the circulation pipe and the exhaust pipe, and a fan is installed in the middle of the circulation pipe to selectively draw the gas in the exhaust pipe to the bottom of the absorption tank.

4. A cooling tower water spraying device according to claim 3, characterized in that: The aforementioned fan is a high-temperature flue gas recirculation fan.

5. A cooling tower water distribution spray device according to claim 1, characterized in that: The number of cooling absorption towers and mounting holes are set in a one-to-one correspondence.

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