CN216767892U - Online cleaning device for tail gas dust collection fan - Google Patents
Online cleaning device for tail gas dust collection fan Download PDFInfo
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- CN216767892U CN216767892U CN202123005192.XU CN202123005192U CN216767892U CN 216767892 U CN216767892 U CN 216767892U CN 202123005192 U CN202123005192 U CN 202123005192U CN 216767892 U CN216767892 U CN 216767892U
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- nitric acid
- tail gas
- gas dust
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Abstract
An online cleaning device for a tail gas dust collecting fan comprises a nitric acid storage tank, a water diversion tank and a mixing tank; a first pipeline is arranged in the nitric acid storage tank, the lower end of the first pipeline extends below the nitric acid liquid level, and the upper end of the first pipeline extends out of the nitric acid storage tank and is communicated with the upper part of the water diversion tank above the nitric acid storage tank; the upper end of the water diversion tank is provided with a second pipeline, the lower end of the water diversion tank is provided with a third pipeline, and the third pipeline is connected with the mixing tank through the pump body; and a fourth pipeline is arranged at the lower end of the mixing tank, the other end of the third pipeline is connected with a nozzle, and the nozzle is just opposite to the tail gas dust collecting fan. The online cleaning device for the tail gas dust collecting fan provided by the utility model can be used for online cleaning, and the service life and the service performance of the tail gas dust collecting fan are improved.
Description
Technical Field
The utility model relates to a cleaning device, in particular to an online cleaning device for a tail gas dust collection fan.
Background
Gas generated in the production process of diammonium phosphate is subjected to early dust removal washing, then is conveyed to a tail gas washer by two dust collection fans, is subjected to the last-stage washing, and is discharged. However, materials in the gas are attached to the fan impeller to form scale, so that the unbalanced vibration of the fan impeller is large, and the long-period normal operation of the ammonium phosphate device is seriously restricted. To this adopt washing or decide manual work clearance of parking, two kinds of modes effect are not good, often compel decrement or parking clearance damage equipment even.
Disclosure of Invention
The utility model aims to solve the technical problem of providing an online cleaning device for a tail gas dust collecting fan, which can clean equipment online and prolong the service life of the equipment.
In order to solve the technical problems, the technical scheme adopted by the utility model is as follows:
an online cleaning device for a tail gas dust collection fan comprises a nitric acid storage tank, a water diversion tank and a mixing tank; a first pipeline is arranged in the nitric acid storage tank, the lower end of the first pipeline extends below the nitric acid liquid level, and the upper end of the first pipeline extends out of the nitric acid storage tank and is communicated with the upper part of the water diversion tank above the nitric acid storage tank; the upper end of the water diversion tank is provided with a second pipeline, the lower end of the water diversion tank is provided with a third pipeline, and the third pipeline is connected with the mixing tank through the pump body; the lower end of the mixing tank is provided with a fourth pipeline, the other end of the third pipeline is connected with a nozzle, and the nozzle is just opposite to the tail gas dust collection fan.
The first pipeline is an acid-resistant rubber pipe.
And liquid level meters are arranged in the water diversion tank and the mixing tank from top to bottom.
The utility model relates to an online cleaning device for a tail gas dust collection fan, which has the following technical effects:
1) by utilizing the characteristic that strong oxidant-nitric acid (with the concentration of 10%) reacts with all metals except gold and platinum and also reacts with nonmetal, the nitric acid (with the concentration of 40%) and water are mixed according to the proportion of 1:4 by metering, pressurized by a pump and sprayed into a fan flow channel through a fan inlet nozzle, and fully atomized to contact with impeller scale blocks (calcium and magnesium) to react. After the scale blocks are reacted and loosened, centrifugal force is generated through high-speed rotation of the impeller, the scale blocks are thrown and fall off, mixed and dissolved in nitric acid liquid and flow out through a blow-off port of the fan or are carried to the tail gas washer by gas, and therefore the purpose of removing the scale blocks of the impeller is achieved.
2) Compared with the traditional method for cleaning the tail gas dust collecting fan during parking, the method has the advantages that after the tail gas dust collecting fan is cleaned on line, the labor and the materials are consumed without parking, the system operation period is prolonged, the environmental protection indexes are controlled, the problem of difficulty in the diammonium phosphate production industry is solved, the comprehensive utilization of resources is realized, and certain economic benefits and environmental protection benefits can be obtained.
Drawings
The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:
FIG. 1 is a schematic diagram of the present invention.
In the figure: the device comprises a nitric acid storage tank 1, a water diversion tank 2, a mixing tank 3, a first pipeline 4, a second pipeline 5, a third pipeline 6, a pump body 7, a fourth pipeline 8, a nozzle 9 and a tail gas dust collection fan 10.
Detailed Description
As shown in figure 1, the online cleaning device for the tail gas dust collecting fan comprises a nitric acid storage tank 1, a water diversion tank 2 and a mixing tank 3. Wherein, a certain amount of nitric acid with the concentration of 40 percent is stored in the nitric acid storage tank 1. The water diversion tank 2 is positioned above the nitric acid storage tank 1 and is a sealed tank body with a cover. The upper end of the left side of the water diversion tank 2 is connected with a hard pipeline with an electromagnetic valve, and the hard pipeline is communicated with the first pipeline 4. The first pipeline 4 is an acid-proof rubber pipe, and the other end of the first pipeline 4 extends to the position below the liquid level of the nitric acid storage tank 1 and can be taken out of the nitric acid storage tank 1. And a second pipeline 5 is installed at the top end of the water diversion tank 2, an electromagnetic valve is arranged on the second pipeline 5, and the electromagnetic valve is opened to introduce pure water into the water diversion tank 2. A safety air valve is also arranged on the water diversion tank 2 at one side of the second pipeline 5, and the air pressure inside and outside the water diversion tank 2 is consistent after the safety air valve is opened at the later stage. The bottom end of the right side of the water diversion tank 2 is provided with a third pipeline 6, the third pipeline 6 is provided with a pump body 7 and an electromagnetic valve, and the other end of the pump body 7 is communicated with the mixing tank 3 through a pipeline. And the lower end of the mixing tank 3 is provided with a fourth pipeline 8, the other end of the fourth pipeline 8 is connected with a nozzle 9, and the nozzle 9 is just opposite to the tail gas dust collecting fan. The fourth pipeline 8 is also provided with a pump body and an electromagnetic valve.
Furthermore, level meters are arranged in the water diversion tank 2 and the mixing tank 3 from top to bottom. The liquid level meter, the electromagnetic valve and the pump body are all electrically connected with the PLC. The liquid inlet, liquid distribution and liquid outlet processes are automatically identified and set by PLC programming design.
The working principle and the process are as follows:
1) firstly, the electromagnetic valve on the second pipeline 5 is opened, a certain amount of water is added into the water diversion tank 2, then the electromagnetic valve on the third pipeline 6 and the pump body 7 are opened, and the pure water is continuously introduced into the water diversion tank 2 and the mixing tank 3 from an external water source. When the liquid levels in the water diversion tank 2 and the mixing tank 3 are constant so that the total amount of the two amounts becomes a desired amount, the amount of pure water at this time is denoted as a.
2) Then, the electromagnetic valve on the second pipeline 5 is closed, the valve on the first pipeline 4 is opened, the electromagnetic valve on the third pipeline 6 is kept in an open state, and the pump body 7 continues to work. As the liquid level in the diversion tank 2 decreases, the air pressure inside the diversion tank 2 gradually decreases, and 40% nitric acid in the nitric acid storage tank 1 is sucked into the diversion tank 2, mixed with pure water and then introduced into the mixing tank 3 along with the pump body 7. When the liquid levels in the water diversion tank 2 and the mixing tank 3 are fixed so that the total amount of the two amounts becomes a desired amount, the amount of the mixed acid liquid at this time is recorded as b. Because the final total acid solution is constant, the input pure water is constant, the input acid solution is also constant, and the output mixed solution is finally controlled to be 10% nitric acid solution by controlling the input proportion of the pure water and the acid solution.
3) When the mixed acid liquid in the water diversion tank 2 and the mixing tank 3 reaches the required amount, the electromagnetic valve on the first pipeline 4 is closed, the air valve on the second pipeline 5 is opened, and the pump body 7 completely pumps the liquid in the water diversion tank 2 into the mixing tank 3 and then stops. Thereby completing the preparation of the 10% nitric acid solution.
4) When the cleaning is needed, the pump body and the electromagnetic valve on the fourth pipeline 8 are opened, and the nitric acid solution can be led out. Meanwhile, the central control post is informed to properly reduce the production load, reduce the frequency of the fan and pay attention to the current and vibration change of the fan. The addition amount of the nitric acid solution is adjusted according to the current and the vibration of the fan and the water yield of the sewage draining outlet (the water accumulation in the fan shell can be caused by overlarge flow or sewage draining blockage). And monitoring and recording the vibration of the fan in the cleaning process. And stopping cleaning after the fan vibrates in a normal operation range.
Claims (3)
1. The utility model provides a tail gas dust collection fan online cleaning device which characterized in that: comprises a nitric acid storage tank (1), a water diversion tank (2) and a mixing tank (3); a first pipeline (4) is arranged in the nitric acid storage tank (1), the lower end of the first pipeline (4) extends below the nitric acid liquid level, and the upper end of the first pipeline (4) extends out of the nitric acid storage tank (1) and is communicated with the upper part of the water diversion tank (2) above the nitric acid storage tank; the upper end of the water diversion tank (2) is provided with a second pipeline (5), the lower end is provided with a third pipeline (6), and the third pipeline (6) is connected with the mixing tank (3) through a pump body (7); the lower end of the mixing tank (3) is provided with a fourth pipeline (8), the other end of the fourth pipeline (8) is connected with a nozzle (9), and the nozzle (9) is right opposite to the tail gas dust collecting fan (10).
2. The online cleaning device for the tail gas dust collecting fan according to claim 1, characterized in that: the first pipeline (4) is an acid-resistant rubber pipe.
3. The online cleaning device for the tail gas dust collecting fan according to claim 1, characterized in that: liquid level meters are arranged in the water diversion tank (2) and the mixing tank (3) from top to bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123005192.XU CN216767892U (en) | 2021-12-02 | 2021-12-02 | Online cleaning device for tail gas dust collection fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123005192.XU CN216767892U (en) | 2021-12-02 | 2021-12-02 | Online cleaning device for tail gas dust collection fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216767892U true CN216767892U (en) | 2022-06-17 |
Family
ID=81964141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123005192.XU Active CN216767892U (en) | 2021-12-02 | 2021-12-02 | Online cleaning device for tail gas dust collection fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216767892U (en) |
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2021
- 2021-12-02 CN CN202123005192.XU patent/CN216767892U/en active Active
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