Sodium hypophosphite reaction tail gas guide pipe cooling device

Abstract

The utility model relates to sodium hypophosphite reaction tail gas guide pipe cooling technical field especially a kind of sodium hypophosphite reaction tail gas guide pipe cooling device, including combustion tower main body, the surface welding of combustion tower main body has cofferdam, the top intercommunication of combustion tower main body has guide pipe main body, the rear side of cofferdam is connect with the first circulating pump by bolt.The utility model communicates with water injection pump and outside water pipe, water is injected into cofferdam by water injection pump, water is immersed combustion tower main body and guide pipe main body, the surface of combustion tower main body and guide pipe main body is cooled by water in cofferdam, in cooling process, due to the combustion reaction in combustion tower main body continues to carry out, it can make the water temperature in cofferdam too high, water in cofferdam is pumped out by the first circulating pump, water in cofferdam is injected into spiral pipe by the first circulating pump, water in spiral pipe is endothermic by water in heat absorption box.

Description

Technical Field

[0001] This utility model relates to the field of cooling technology for sodium hypophosphite reaction tail gas duct, specifically a cooling device for sodium hypophosphite reaction tail gas duct. Background Technology

[0002] Sodium hypophosphite is an inorganic compound. During the sodium hypophosphite reaction, the combustion tower produces a lot of exhaust gas. The exhaust gas is fed into the absorption pipe for treatment through the gas guide pipe. The exhaust gas produced by combustion is at a high temperature, which will accelerate the aging of the gas guide pipe. Therefore, the gas guide pipe needs to be cooled down, which requires the use of a cooling device.

[0003] The existing gas pipe cooling device is a jacket fitted on its surface. Water in the jacket cools the gas pipe. However, after prolonged heating, the water in the jacket will produce a large amount of scale, which will block the device pipes and reduce the cooling effect. The gas pipe will also be corroded by sodium hypophosphite residue in the exhaust gas and high temperature, requiring a lot of downtime for repairs, which seriously restricts the continuity of production. In order to solve the above technical problems, we have designed a sodium hypophosphite reaction exhaust gas gas pipe cooling device. Utility Model Content

[0004] The purpose of this invention is to provide a cooling device for the tail gas duct of sodium hypophosphite reaction, which has the advantage of good cooling effect. It solves the problems of existing cooling devices that use a jacket on the surface of the duct, which cools the duct by water in the jacket. However, the water in the jacket will produce a lot of scale after being heated for a long time. The scale will block the device pipes, making the cooling effect worse. The duct will also be corroded by sodium hypophosphite residue in the tail gas and high temperature, requiring a lot of downtime for repair, which seriously restricts the continuity of production.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a cooling device for a sodium hypophosphite reaction tail gas duct, comprising a combustion tower body, a dam welded to the surface of the combustion tower body, a duct body connected to the top of the combustion tower body, a first circulation pump bolted to the rear side of the dam, a heat absorption box welded to the rear side of the dam, a spiral tube installed in the inner cavity of the heat absorption box, a cooling shell connected to the top of the combustion tower body, a cooling mesh bolted to the inner cavity of the cooling shell, a spray head installed in the inner cavity of the cooling shell, a fixing frame bolted to the inner cavity of the cooling shell, a motor bolted to the bottom of the fixing frame, an air blower bolted to the drive shaft of the motor, a spiral tube installed in the inner cavity of the cooling shell, and a second circulation pump bolted to the top of the heat absorption box.

[0006] Preferably, a water injection pump is bolted to the left side of the cofferdam, and the outlet pipe of the water injection pump is connected to the cofferdam via a pipeline.

[0007] Preferably, the pumping pipe of the first circulating pump is connected to the cofferdam via a pipeline, and the outlet pipe of the first circulating pump is connected to the spiral pipe via a pipeline.

[0008] Preferably, a water stop valve is connected to the right side of the heat absorption box, and a connecting pipe is connected to the right side of the water stop valve.

[0009] Preferably, the inner cavity of the cooling shell is connected to a protective mesh by bolts, and the top of the protective mesh is in contact with the worm gear tube.

[0010] Preferably, the pumping pipe of the second circulating pump is connected to the heat absorption box via a pipe, the top of the heat absorption box is connected to the spiral tube via a pipe, and the outlet pipe of the second circulating pump is connected to the spiral tube via a pipe.

[0011] Preferably, the surface of the cooling shell is bolted with a filter plate, the top of the spiral tube is connected to the spray head through a pipe, and a drain valve is connected to the right side of the cofferdam.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model connects a water injection pump to an external water pipe, injects water into the cofferdam, and submerges the main body of the combustion tower and the main body of the gas guide pipe. The water in the cofferdam cools the surface of the main body of the combustion tower and the main body of the gas guide pipe, and the main body of the combustion tower carries out the combustion reaction of sodium hypophosphite. 2. In the cooling process of this invention, due to the continuous combustion reaction inside the combustion tower, the water temperature inside the dam becomes too high. The water in the dam is pumped out by the first circulation pump and injected into the spiral tube. The water in the heat absorption box absorbs heat from the water inside the spiral tube. After heat absorption, the water in the spiral tube flows into the spray head, which sprays the cooled water onto the cooling mesh. As the water passes through the cooling mesh, a water film forms between the holes inside the mesh, increasing the contact area between the water and the air. The motor's drive shaft drives the air blower to rotate, which in turn causes airflow, allowing air from outside the cooling shell to enter the cooling mesh through its surrounding holes. The air cools the water inside the cooling mesh, and the cooled water flows back into the cofferdam for continuous cooling. A second circulation pump draws water from the heat absorption box and injects it into the spiral tube. The high-speed airflow from the air blower cools the water inside the spiral tube, reducing its temperature. The cooled water then flows back into the heat absorption box to cool the water inside the spiral tube. Attached Figure Description

[0013] Figure 1 This is an isometric view of the structure of this utility model; Figure 2This is a perspective view of the filter plate and protective net of this utility model; Figure 3 This is a perspective view of the heat absorption box and the second circulation pump of this utility model; Figure 4 This is a perspective view of the first circulating pump and spray head of this utility model; Figure 5 This is a perspective view of the combustion tower body and water injection pump of this utility model.

[0014] In the diagram: 1. Combustion tower main body; 2. Gas duct main body; 3. Dike; 4. Water injection pump; 5. First circulation pump; 6. Heat absorption box; 7. Water stop valve; 8. Spiral tube; 9. Filter plate; 10. Cooling shell; 11. Spray head; 12. Cooling mesh; 13. Fixing frame; 14. Motor; 15. Air blower; 16. Protective net; 17. Spiral tube; 18. Second circulation pump. Detailed Implementation

[0015] Please see Figures 1-5 A cooling device for the tail gas of a sodium hypophosphite reaction includes a combustion tower body 1, a dam 3 welded to the surface of the combustion tower body 1, a gas duct body 2 connected to the top of the combustion tower body 1, a first circulation pump 5 bolted to the rear side of the dam 3, a heat absorption box 6 welded to the rear side of the dam 3, a spiral tube 8 installed in the inner cavity of the heat absorption box 6, a cooling shell 10 connected to the top of the combustion tower body 1, a cooling mesh 12 bolted to the inner cavity of the cooling shell 10, a spray head 11 installed in the inner cavity of the cooling shell 10, a fixing frame 13 bolted to the inner cavity of the cooling shell 10, a motor 14 bolted to the bottom of the fixing frame 13, an air blower 15 bolted to the drive shaft of the motor 14, a spiral tube 17 installed in the inner cavity of the cooling shell 10, and a second circulation pump 18 bolted to the top of the heat absorption box 6.

[0016] Please see Figure 1 and Figure 5 A water injection pump 4 is bolted to the left side of the cofferdam 3. By setting up the water injection pump 4, it is convenient to inject water into the cofferdam 3, and to cool down the combustion tower body 1 and the gas guide pipe body 2. The water outlet pipe of the water injection pump 4 is connected to the cofferdam 3 through a pipeline.

[0017] Please see Figure 1 and Figure 4 The pumping pipe of the first circulation pump 5 is connected to the cofferdam 3 through a pipeline, and the outlet pipe of the first circulation pump 5 is connected to the spiral pipe 8 through a pipeline. By setting the spiral pipe 8, it is easy to cool the water in the cofferdam 3 once, and it is easy to lower the water temperature to a lower level in the future.

[0018] Please see Figure 1 and Figure 4A water stop valve 7 is connected to the right side of the heat absorption box 6. By setting the water stop valve 7, it is easy to drain and replenish the water in the heat absorption box 6, and it is easy to replace the water in the heat absorption box 6. A connecting pipe is connected to the right side of the water stop valve 7.

[0019] Please see Figure 1 and Figure 2 The inner cavity of the cooling shell 10 is connected to a protective net 16 by bolts. By setting the protective net 16, it is easy to support and protect the worm tube 17, and effectively prevent the worm tube 17 from contacting the air blower 15. The top of the protective net 16 is in contact with the worm tube 17.

[0020] Please see Figure 1 and Figure 3 The water pumping pipe of the second circulation pump 18 is connected to the heat absorption box 6 through a pipe. The top of the heat absorption box 6 is connected to the spiral tube 17 through a pipe. The water outlet pipe of the second circulation pump 18 is connected to the spiral tube 17 through a pipe. By setting the spiral tube 17, it is convenient to cool the water in the heat absorption box 6 and to continuously cool the hot water in the spiral tube 8.

[0021] Please see Figure 1 and Figure 2 The surface of the cooling shell 10 is connected to a filter plate 9 by bolts. By setting the filter plate 9, it is easy to filter the air and effectively prevent impurities from entering the cooling mesh 12. The top of the spiral tube 8 is connected to the spray head 11 through a pipe. A drain valve is connected to the right side of the cofferdam 3. By setting the drain valve, it is easy to drain the water inside the cofferdam 3 and to replace the water in the cofferdam 3.

[0022] The first circulating pump 5 is model IHG and can operate in environments ranging from -20℃ to 150℃.

[0023] The model of motor 14 is TEBY.

[0024] In use, the water injection pump 4 is connected to an external water pipe, and water is injected into the cofferdam 3 through the water injection pump 4, so that the water submerges the combustion tower body 1 and the gas guide pipe body 2. The water in the cofferdam 3 cools the surface of the combustion tower body 1 and the gas guide pipe body 2. The sodium hypophosphite undergoes a combustion reaction in the combustion tower body 1. During the cooling process, because the combustion reaction inside the combustion tower body 1 continues, the water temperature inside the cofferdam 3 becomes too high. The water in the cofferdam 3 is then pumped out by the first circulation pump 5 and injected into the spiral tube 8. The water in the heat absorption box 6 absorbs heat from the water inside the spiral tube 8. After heat absorption, the water in the spiral tube 8 flows into the spray head 11, and the water after the first cooling is sprayed onto the cooling mesh 12 through the spray head 11. When water passes through the cooling mesh 12, a water film forms between the holes inside the cooling mesh 12, increasing the contact area between the water and the air. The drive shaft of the motor 14 drives the air blower 15 to rotate, and the air blower 15 drives the airflow, allowing the air outside the cooling shell 10 to enter the cooling mesh 12 through the holes around it. The air cools the water inside the cooling mesh 12. The cooled water flows back to the cofferdam 3 for continuous cooling. The second circulation pump 18 draws water out of the heat absorption box 6 and injects it into the spiral tube 17. The high-speed airflow blown by the air blower 15 cools the water inside the spiral tube 17, reducing the water temperature. The cooled water flows back to the heat absorption box 6 to cool the water inside the spiral tube 8.

[0025] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The embodiments and features in these embodiments can be arbitrarily combined without conflict. However, under conditions with high safety and process requirements, these embodiments cannot be used because they cannot provide the on / off state of the second pneumatic valve. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. A cooling device for the tail gas of sodium hypophosphite reaction, comprising a combustion tower body (1), characterized in that: The combustion tower body (1) is welded with a dam (3) on its surface. The top of the combustion tower body (1) is connected to a gas guide pipe body (2). The rear side of the dam (3) is connected to a first circulation pump (5) by bolts. The rear side of the dam (3) is welded with a heat absorption box (6). The inner cavity of the heat absorption box (6) is equipped with a spiral tube (8). The top of the combustion tower body (1) is connected to a cooling shell (10). The inner cavity of the cooling shell (10) is connected to a cooling mesh (12) by bolts. The inner cavity of the cooling shell (10) is equipped with a spray head (11). The inner cavity of the cooling shell (10) is connected to a fixing frame (13) by bolts. The bottom of the fixing frame (13) is connected to a motor (14) by bolts. The drive shaft of the motor (14) is connected to a blower fan (15) by bolts. The inner cavity of the cooling shell (10) is equipped with a spiral tube (17). The top of the heat absorption box (6) is connected to a second circulation pump (18) by bolts.

2. The sodium hypophosphite reaction tail gas cooling device according to claim 1, characterized in that: A water injection pump (4) is bolted to the left side of the cofferdam (3), and the outlet pipe of the water injection pump (4) is connected to the cofferdam (3) through a pipeline.

3. The sodium hypophosphite reaction tail gas cooling device according to claim 1, characterized in that: The pumping pipe of the first circulating pump (5) is connected to the cofferdam (3) through a pipeline, and the outlet pipe of the first circulating pump (5) is connected to the spiral pipe (8) through a pipeline.

4. The sodium hypophosphite reaction tail gas cooling device according to claim 1, characterized in that: The right side of the heat absorption box (6) is connected to a water stop valve (7), and the right side of the water stop valve (7) is connected to a connecting pipe.

5. The sodium hypophosphite reaction tail gas cooling device according to claim 1, characterized in that: The inner cavity of the cooling shell (10) is connected to a protective net (16) by bolts, and the top of the protective net (16) is in contact with the worm tube (17).

6. The sodium hypophosphite reaction tail gas cooling device according to claim 1, characterized in that: The pumping pipe of the second circulating pump (18) is connected to the heat absorption box (6) through a pipe. The top of the heat absorption box (6) is connected to the spiral tube (17) through a pipe. The outlet pipe of the second circulating pump (18) is connected to the spiral tube (17) through a pipe.

7. The sodium hypophosphite reaction tail gas cooling device according to claim 1, characterized in that: The surface of the cooling shell (10) is connected to a filter plate (9) by bolts, the top of the spiral pipe (8) is connected to the spray head (11) by a pipe, and the right side of the dam (3) is connected to a drain valve.

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