Emergency cooling device for fire-fighting water of wet desulfurization tower

Abstract

The utility model discloses a wet desulfurization tower fire-fighting water emergency cooling device which comprises a desulfurization tower body, one side of the desulfurization tower body is fixedly connected with a flue, the top and the bottom of the flue are fixedly connected with a fire-fighting pipe and a circulating pipe respectively, and the middle of the fire-fighting pipe and the middle of the circulating pipe are each provided with a one-way valve and an electromagnetic valve. The fire-fighting pipe and the circulating pipe penetrate through the flue and are jointly and fixedly connected with a central pipe, and a branch pipe is arranged outside the central pipe. The desulfurization tower body, the flue, the flue gas mixing assembly and the nozzles are matched with one another, lime mixed slurry is pumped into the tower through the nozzles in the flue during normal operation, the desulfurization efficiency can be effectively improved, fire fighting water is pumped into the tower during emergency cooling, the effect of cooling the tower body is achieved, the safety of the desulfurization tower is conveniently improved, and the service life of the desulfurization tower is prolonged. And meanwhile, when the process water for desulfurization is replenished abnormally and the water level in the wet desulfurization tower is sharply reduced, the fire-fighting water cooling device can be started, so that the water replenishing effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of desulfurization tower cooling equipment, in particular to an emergency cooling device for fire water of a wet desulfurization tower. Background Art

[0002] Wet desulfurization tower, as an important air pollution treatment equipment, is widely used in industrial fields such as coal-fired power plants and steel mills.

[0003] If, due to special circumstances, there is a temporary power outage / gas outage in the desulfurization tower area, the circulation pump and demister flushing water pump may not operate normally, causing the flue gas temperature in the tower to be too high, which may easily cause the demister to burn, and even cause the glass flakes used for anti-wear in the tower to catch fire, resulting in irreparable losses.

[0004] Therefore, we propose to design a fire water emergency cooling device at the inlet flue of the desulfurization tower. Utility Model Content

[0005] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and in the abstract and title of the utility model to avoid obscuring the purpose of this section, the abstract and the title of the utility model, and such simplifications or omissions shall not be used to limit the scope of the present invention.

[0006] In order to solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0007] A fire water emergency cooling device for a wet desulfurization tower comprises a desulfurization tower body, a flue fixedly connected to one side of the desulfurization tower body, a fire pipe and a circulation pipe fixedly connected to the top and bottom of the flue, respectively, a one-way valve and a solenoid valve being provided in the middle of each of the fire pipe and the circulation pipe, the fire pipe and the circulation pipe passing through the flue and being fixedly connected to a central pipe, a branch pipe being provided on the outside of the central pipe, a nozzle being fixedly connected to the side of the central pipe and the branch pipe close to the desulfurization tower body, and a circulation pump being provided on one side of the bottom of the desulfurization tower body;

[0008] A flue gas mixing assembly is provided inside the flue, and the flue gas mixing assembly includes an end cover fixed to the end of the flue, a spiral mixing tube is provided on the side of the end cover close to the desulfurization tower body, a flue gas inlet pipe and a cooling air pipe are provided outside the end cover, and a booster pump is fixedly connected to the top of the cooling air pipe.

[0009] As a preferred solution of the wet desulfurization tower fire water emergency cooling device described in the utility model, the cross-sections of the central pipe and the branch pipe are arranged in a cross shape, and the intersection of the central pipe and the branch pipe is located at the center of the flue, so that the nozzle can fully cover the range of the flue.

[0010] As a preferred solution of the fire water emergency cooling device for a wet desulfurization tower described in the utility model, the nozzle is a hollow cone, and a plurality of nozzles are provided. The nozzles are evenly distributed on the central pipe and the branch pipes, so that the spraying area covered by the nozzle is twice the cross-sectional area of ​​the flue as a whole.

[0011] As a preferred solution of the fire water emergency cooling device for a wet desulfurization tower described in the utility model, the extraction end of the circulation pump passes through the desulfurization tower body and is connected to its interior, and the discharge end of the circulation pump is connected to the circulation pipe. Under normal circumstances, it is convenient to circulate and spray the lime slurry to improve the desulfurization efficiency.

[0012] As a preferred solution of the emergency cooling device for fire water in a wet desulfurization tower described in the utility model, a check valve is provided inside the cooling air pipe to prevent the backflow of flue gas.

[0013] As a preferred solution of the fire water emergency cooling device for a wet desulfurization tower described in the utility model, the flue gas inlet pipe and the cooling air pipe are connected to the end of the spiral mixing tube. A flue gas outlet is provided at one end of the spiral mixing tube close to the desulfurization tower body, which is convenient for mixing the flue gas with the cooling gas, reducing the concentration of the flue gas, and increasing the flow rate of the flue gas.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The utility model cooperates with each other among the desulfurization tower body, the flue, the flue gas mixing component and the nozzle. Under normal operation, lime mixed slurry is injected into the tower through the nozzle in the flue, which can effectively improve the desulfurization efficiency. In the event of emergency cooling, fire water is injected into the tower to cool the tower body, which is convenient for improving the safety of the desulfurization tower and reducing the number of non-stop times of the boiler. At the same time, when the water replenishment of the process water for desulfurization is abnormal, the water level in the wet desulfurization tower drops sharply, the fire water cooling device can be opened to achieve the water replenishment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without inventive labor. Among them:

[0017] Figure 1 This is a three-dimensional diagram of an emergency cooling device for fire water in a wet desulfurization tower according to the present invention;

[0018] Figure 2This is a schematic diagram of the central pipe structure of a fire water emergency cooling device for a wet desulfurization tower according to the present invention;

[0019] Figure 3 This is a schematic diagram of a flue gas mixing component of a fire water emergency cooling device for a wet desulfurization tower according to the present invention.

[0020] Legend: 1. Desulfurization tower body; 2. Flue; 3. Fire-fighting pipe; 4. Circulation pipe; 5. One-way valve; 6. Solenoid valve; 7. Center pipe; 8. Branch pipe; 9. Nozzle; 10. Circulation pump; 11. Flue gas mixing assembly; 111. End cover; 112. Spiral mixing pipe; 113. Flue gas inlet pipe; 114. Cooling air pipe; 115. Booster pump; 116. Check valve; 117. Flue gas outlet. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0022] Next, the present invention is described in detail with reference to schematic diagrams. For ease of illustration, cross-sectional views of device structures may be partially enlarged and not to scale when describing the embodiments of the present invention. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of protection of the present invention. Furthermore, in actual production, three-dimensional dimensions, including length, width, and depth, should be included.

[0023] In order to make the purpose, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0024] See also Figure 1-3 The utility model provides a fire water emergency cooling device for a wet desulfurization tower, comprising a desulfurization tower body 1, a flue 2 fixedly connected to one side of the desulfurization tower body 1, a fire pipe 3 and a circulation pipe 4 fixedly connected to the top and bottom of the flue 2 respectively, a one-way valve 5 and a solenoid valve 6 are provided in the middle of the fire pipe 3 and the circulation pipe 4, the fire pipe 3 and the circulation pipe 4 pass through the flue 2 and are fixedly connected to a central pipe 7 together, a branch pipe 8 is provided on the outside of the central pipe 7, and a nozzle 9 is fixedly connected to the central pipe 7 and the branch pipe 8 close to the side of the desulfurization tower body 1.

[0025] In this embodiment, the cross sections of the central tube 7 and the branch tubes 8 are arranged in a cross shape, and the intersection of the central tube 7 and the branch tubes 8 is located at the center of the flue 2, so that the nozzle 9 can fully cover the range of the flue 2.

[0026] The nozzle 9 is a hollow cone, and a plurality of nozzles 9 are provided. The nozzles 9 are evenly distributed on the central pipe 7 and the branch pipes 8, so that the spraying area covered by the nozzles 9 is twice the cross-sectional area of ​​the flue 2 as a whole.

[0027] A circulation pump 10 is provided on one side of the bottom of the desulfurization tower body 1. The extraction end of the circulation pump 10 passes through the desulfurization tower body 1 and is connected to its interior. The discharge end of the circulation pump 10 is connected to the circulation pipe 4. Under normal circumstances, it is convenient to circulate and spray the lime slurry to improve the desulfurization efficiency.

[0028] A flue gas mixing assembly 11 is installed inside the flue 2. The flue gas mixing assembly 11 includes an end cap 111 fixed to the end of the flue 2. A spiral mixing pipe 112 is installed on the side of the end cap 111 close to the desulfurization tower body 1. A flue gas inlet pipe 113 and a cooling air pipe 114 are installed outside the end cap 111. A check valve 116 is installed inside the cooling air pipe 114 to prevent flue gas backflow. A booster pump 115 is fixedly connected to the top of the cooling air pipe 114.

[0029] The flue gas inlet pipe 113 and the cooling gas pipe 114 are connected to the end of the spiral mixing tube 112. A flue gas outlet 117 is provided at one end of the spiral mixing tube 112 close to the desulfurization tower body 1, which is convenient for mixing the flue gas with the cooling gas, reducing the concentration of the flue gas and increasing the flow rate of the flue gas.

[0030] During use, the flue gas enters through the flue gas inlet pipe 113, and the cooling air pipe 114 on the other side is used to pass normal temperature gas. The booster pump 115 is used to increase the flow rate of the normal temperature gas, so that the flue gas and the normal temperature gas enter the spiral mixing tube 112 together. This not only cools the flue gas, but also increases the flue gas intake speed, thereby improving the desulfurization efficiency of the flue gas.

[0031] Under normal operation, a plurality of nozzles 9 in the flue 2 can be used to inject lime mixed slurry into the tower to improve the desulfurization efficiency of the flue gas. A circulating pump 10 at the bottom of the tower is convenient for pumping out the lime mixed slurry and circulating it for spraying.

[0032] During emergency cooling, water can be controlled to flow into the fire pipe 3 through PLC programming, and then sprayed out through the nozzle 9 to start cooling the tower body, thereby improving the safety of the desulfurization tower and reducing the number of non-stop operations of the boiler.

[0033] At the same time, when the desulfurization process water replenishment is abnormal, the water level in the wet desulfurization tower drops sharply. At this time, the fire water cooling device can be turned on to achieve the water replenishment effect by spraying fire water.

[0034] In this embodiment, the solenoid valve 6 needs to be activated when there is a power outage or gas failure in the desulfurization area. The power supply needs to be taken from the boiler emergency power supply or UPS uninterruptible power supply to ensure that it can open and close normally in the event of power outage or gas failure.

[0035] While the present invention has been described above with reference to specific embodiments, various modifications may be made and equivalent components may be substituted without departing from the scope of the present invention. In particular, as long as no structural conflicts exist, the various features of the embodiments disclosed herein may be combined with one another in any manner, and the omission of an exhaustive description of these combinations in this specification is solely for the sake of space and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A wet desulfurization tower fire water emergency cooling device, comprising a desulfurization tower body (1), characterized in that: A flue (2) is fixedly connected to one side of the desulfurization tower body (1); a fire-fighting pipe (3) and a circulation pipe (4) are fixedly connected to the top and bottom of the flue (2), respectively; a one-way valve (5) and a solenoid valve (6) are provided in the middle of each of the fire-fighting pipe (3) and the circulation pipe (4); the fire-fighting pipe (3) and the circulation pipe (4) pass through the flue (2) and are fixedly connected to a central pipe (7); a branch pipe (8) is provided outside the central pipe (7); a nozzle (9) is fixedly connected to the side of the central pipe (7) and the branch pipe (8) close to the desulfurization tower body (1); and a circulation pump (10) is provided on one side of the bottom of the desulfurization tower body (1); A flue gas mixing assembly (11) is provided inside the flue (2), and the flue gas mixing assembly (11) comprises an end cover (111) fixed to the end of the flue (2); a spiral mixing pipe (112) is provided on the side of the end cover (111) close to the desulfurization tower body (1); a flue gas inlet pipe (113) and a cooling air pipe (114) are provided outside the end cover (111); and a booster pump (115) is fixedly connected to the top of the cooling air pipe (114).

2. A wet desulfurization tower fire water emergency cooling device according to claim 1, characterized in that: The cross sections of the central tube (7) and the branch tubes (8) are arranged in a cross-like manner, and the intersection of the central tube (7) and the branch tubes (8) is located at the center of the flue (2).

3. The emergency cooling device for fire water in a wet desulfurization tower according to claim 1, characterized in that: The nozzle (9) is a hollow cone type, and a plurality of the nozzles (9) are provided, and the plurality of the nozzles (9) are evenly distributed on the central pipe (7) and the branch pipes (8).

4. The emergency cooling device for fire water in a wet desulfurization tower according to claim 1, characterized in that: The extraction end of the circulation pump (10) passes through the desulfurization tower body (1) and is connected to the interior thereof, and the discharge end of the circulation pump (10) is connected to the circulation pipe (4).

5. The emergency cooling device for fire water in a wet desulfurization tower according to claim 1, characterized in that: A check valve (116) is provided inside the cooling air pipe (114).

6. The emergency cooling device for fire water in a wet desulfurization tower according to claim 1, characterized in that: The flue gas inlet pipe (113) and the cooling gas pipe (114) are connected to the end of the spiral mixing pipe (112). The spiral mixing pipe (112) is provided with a flue gas outlet (117) at one end close to the desulfurization tower body (1).

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