Waste gas spray tower capable of controlling temperature of treating fluid

Abstract

The invention discloses a treating fluid temperature controllable waste gas spray tower, and belongs to the technical field of spray towers, the spray tower comprises a tower body, a spray device, a waste gas box and a heat pipe, the bottom in the tower body is a liquid storage area for storing treating fluid, the tower body is provided with a gas inlet pipe and a gas outlet pipe, the waste gas box is connected with a first inlet pipe and a first outlet pipe, and the first inlet pipe and the first outlet pipe are communicated with each other. The first outlet pipe communicates with the gas inlet pipe, the heat pipe comprises an evaporation section and a condensation section, the evaporation section is located in the waste gas box, and the condensation section is located in the liquid storage area. Heat of waste gas is transferred into treatment liquid in the liquid storage area through the heat pipe, waste heat of the waste gas is used for heating the treatment liquid, and the device is efficient, safe and energy-saving; the heat pipe is directly inserted into the liquid storage area, overall heating of the treatment liquid can be completed without conveying equipment such as a water pump, energy is saved, and consumption is reduced; the temperature of the treatment liquid in the liquid storage area is controlled by controlling the flue gas flow in the first box body and the second box body, so that the temperature of the treatment liquid is kept in a proper range, and the waste gas treatment effect is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of spray towers, and in particular relates to a waste gas spray tower with controllable treatment liquid temperature. Background Art

[0002] The waste gas spray tower is a device for treating waste gas. The waste gas is introduced into the tower and the spray equipment is used to spray the waste gas with treatment liquid such as acid or alkali according to the type of waste gas, so as to purify the waste gas. The existing waste gas spray tower is generally used outdoors, and the temperature of the treatment liquid affects the treatment effect of the waste gas. When the temperature of the treatment liquid is too low, it may cause the viscosity to increase and the spraying effect to weaken. If the treatment liquid freezes in winter, it may also affect the stable operation of the equipment; when the temperature of the treatment liquid is too high, it will affect its absorption efficiency. Excessive temperature will cause the acid or alkali solution to volatilize, thereby affecting the purification effect of the waste gas. Summary of the invention

[0003] In view of the above problems existing in the prior art, the technical problem to be solved by the present invention is to provide a waste gas spray tower with controllable temperature of the treatment liquid to keep the temperature of the treatment liquid within an appropriate range.

[0004] Technical solution: In order to solve the above technical problems, the technical solution adopted by the present invention is as follows:

[0005] A waste gas spray tower with controllable treatment liquid temperature comprises a tower body, a spray device arranged on the tower body, a waste gas box connected to the tower body and a heat pipe arranged on the waste gas box, the inner bottom of the tower body is a liquid storage area for storing treatment liquid, an air inlet pipe and an air outlet pipe are arranged on the tower body, a first inlet pipe and a first outlet pipe are connected to the waste gas box, the first outlet pipe is communicated with the air inlet pipe, the heat pipe comprises an evaporation section and a condensation section, the evaporation section is located in the waste gas box, and the condensation section is located in the liquid storage area.

[0006] Preferably, the exhaust gas box includes a first box body connected to the bottom wall of the tower body and a second box body connected to the first box body, the evaporation section is located in the first box body, the first inlet pipe includes a first inlet branch pipe connected to the first box body and a second inlet branch pipe connected to the second box body, and the first outlet pipe includes a first outlet branch pipe connected to the first box body and a second outlet branch pipe connected to the second box body.

[0007] Preferably, the first inlet branch pipe is provided with a first control valve, and the second inlet branch pipe is provided with a second control valve.

[0008] Preferably, the evaporation section is provided with a first fin, and the condensation section is provided with a second fin.

[0009] Preferably, the tower body includes a water tank for expanding the inner bottom volume.

[0010] Preferably, the spray device comprises a water pump connected to the tower body, a spray pipe connected to the water pump, and a spray head arranged on the spray pipe and arranged in the tower body, and a packing layer is provided in the tower body.

[0011] Preferably, the air inlet pipe is connected to the side wall of the tower body, and the air outlet is connected to the top of the tower body.

[0012] Preferably, a heat-insulating layer is provided on the tower body.

[0013] Beneficial effects: Compared with the prior art, the present invention has the following advantages:

[0014] 1. Through the exhaust gas box arranged under the tower body and the heat pipe arranged on the exhaust gas box, the evaporation end of the heat pipe is located in the exhaust gas box, and the condensation section of the heat pipe is located in the liquid storage area of ​​the tower body. The heat pipe is used to transfer the heat of the exhaust gas to the treatment liquid in the liquid storage area. The heat pipe has high thermal conductivity and utilizes the waste heat of the exhaust gas to heat the treatment liquid. No external electric heater is required, which is efficient, safe and energy-saving.

[0015] 2. The heat pipe is directly inserted into the liquid storage area, and the overall heating of the treatment liquid can be completed without the help of water pumps and other conveying equipment, thus saving energy and reducing consumption;

[0016] 3. The exhaust gas box includes a first box body and a second box body, the first inlet pipe includes a first inlet branch pipe connected to the first box body and a second inlet branch pipe connected to the second box body, and the first inlet branch pipe and the second inlet branch pipe are respectively provided with control valves. The opening of the control valve can be used to control the flue gas flow in the corresponding pipeline and the box body, thereby controlling the flue gas flow into the first box body and the second box body. The temperature of the treatment liquid in the liquid storage area is controlled by controlling the flue gas flow in the first box body and the second box body, so that the temperature of the treatment liquid is maintained in an appropriate range to ensure the treatment effect of the exhaust gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0018] Figure 2 2. It is a schematic diagram of the structure of the exhaust gas box in the embodiment;

[0019] Figure 3 This is the working principle diagram of the heat pipe. DETAILED DESCRIPTION

[0020] The present invention is further illustrated below in conjunction with specific examples. The examples are implemented based on the technical solutions of the present invention. It should be understood that these examples are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0021] As Figure 1 As shown, a waste gas spray tower with controllable treatment liquid temperature includes a tower body 1, a spray device 2, a waste gas box 3 and a heat pipe 4. The main body of the tower body 1 is cylindrical, and an air inlet pipe 11 and an air outlet pipe 12 are arranged on the tower body 1. The air inlet pipe 11 is connected to the side wall of the tower body 1 near the lower end, and the air outlet 12 is connected to the middle position of the top of the tower body 1. The bottom of the tower body 1 is a liquid storage area 14, which is used to store the treatment liquid. The lower end of the tower body 1 is provided with a water tank box 13, which is used to expand the volume of the bottom of the tower body 1. The space in the water tank box 13 also belongs to the liquid storage area 14. When in use, the liquid level of the treatment liquid in the liquid storage area 14 is about three quarters of the height of the water tank box 13. According to the different types of waste gas to be treated, the treatment liquid is selected from acid or alkali. The tower body 1 is provided with an insulation layer 15, which is made of existing insulation materials such as rock wool board, etc., to reduce the heat exchange between the tower body 1 and the outside of the tower body 1. A demister 6 is provided near the top of the tower body 1, and the demister 6 is an existing baffle demister to separate the mist droplets from the gas.

[0022] like Figure 1 As shown, the spray device 2 is arranged on the tower body 1, and the spray device 2 includes a water pump 21, a spray pipe 22 and a nozzle 23. The water pump 21 is arranged on the outer top wall of the water tank box 13, and the inlet end of the water pump 21 is connected to the liquid storage area 14 through the water inlet pipe. The spray pipe 22 is arranged in the tower body 1 and two are arranged above and below. The two spray pipes 22 are connected to the outlet end of the water pump 21. There are multiple nozzles 23, and the multiple nozzles 23 are arranged on the spray pipe 22 and are used to spray liquid downward. The water pump 21 transports the treated liquid in the liquid storage area 14 to the nozzle 23 for spraying, which is used to treat the exhaust gas. A packing layer 7 is provided below each spray pipe 22 in the tower body 1, and the packing layer 7 includes multiple spherical fillers. The nozzle 23 sprays the treated liquid toward the packing layer 7. The spherical filler can increase the contact area between the gas and the liquid, and improve the treatment effect of the exhaust gas. The treated liquid dropped from the packing layer 7 returns to the liquid storage area 14.

[0023] like Figure 1 and Figure 2As shown, the exhaust box 3 is connected to the bottom wall of the tower body 1, and the exhaust box 3 includes a first box body 31 and a second box body 32. The first box body 31 and the second box body 32 are stacked up and down, the top of the first box body 31 is connected to the bottom wall of the tower body 1, and the second box body 32 is connected to the bottom of the first box body 31. One end of the exhaust box 3 is connected to a first inlet pipe 51, and the other end of the exhaust box 3 is connected to a first outlet pipe 52. The first outlet pipe 52 is connected to the air inlet pipe 11. The first inlet pipe 51 is used to connect to an external exhaust gas source. The external exhaust gas passes through the exhaust box 3 and enters the tower body 1 through the first outlet pipe 52 and the air inlet pipe 11. The first inlet pipe 51 includes a first inlet branch pipe 511 connected to the first box body 31 and a second inlet branch pipe 512 connected to the second box body 32. The first outlet pipe 52 includes a first outlet branch pipe 521 connected to the first box body 31 and a second outlet branch pipe 522 connected to the second box body 32. The first inlet branch pipe 511 is provided with a first control valve 53, and the second inlet branch pipe 512 is provided with a second control valve 54. The first control valve 53 and the second control valve 54 are both butterfly valves. The opening of the butterfly valve can control the smoke flow in the corresponding pipeline and the box body, thereby controlling the smoke flow entering the first box body 31 and the second box body 32.

[0024] like Figure 1 , Figure 2 and Figure 3 As shown, the heat pipe 4 is arranged on the exhaust gas box 3, and a plurality of heat pipes 4 are arranged. The heat pipe 4 adopts the existing cylindrical heat pipe. The heat pipe 4 includes an evaporation section 41 at the lower end and a condensation section 42 at the upper end. The evaporation section 41 is located in the first box body 31, and the condensation section 42 is located in the liquid storage area 14. The insulation section in the middle of the heat pipe 4 is detachably connected to the bottom wall of the tower body 1 by a threaded connection, which is convenient for replacement. The heat pipe 4 includes a tube shell and a liquid wick 402. The tube shell is made of stainless steel. The liquid wick 402 is arranged on the inner wall of the tube shell. The liquid wick 402 is formed by sintering copper powder. The tube shell is filled with appropriate liquid. When exhaust gas enters the first box body 31, the evaporation section 41 is heated, and the liquid in the tube shell is quickly vaporized. The vapor flows upward and condenses in the condensation section 42 at the upper end to release heat. The liquid then flows back to the evaporation section 41 along the liquid wick 402 under the action of capillary force. This cycle continues, thereby utilizing the heat of the exhaust gas to heat the treated liquid in the liquid storage area 14. In order to improve the heat exchange effect, a first fin (the first fin is not shown in the figure) is provided on the evaporation section 41 to increase the contact area between the exhaust gas and the evaporation section 41. The first fin is a rectangular sheet and is parallel to the direction of the airflow in the first box body 31. A second fin (the second fin is not shown in the figure) is provided on the condensation section 42 to increase the contact area between the treated liquid and the condensation section 42.

[0025] When the washing tower of this embodiment is in use, the high-temperature exhaust gas to be treated is connected to the first inlet pipe 51, the first control valve 53 and the second control valve 54 are opened, and the exhaust gas passes through the first box body 31 and the second box body 32 and enters the tower body 1 from the first outlet pipe 52 and the air inlet pipe 11. The exhaust gas passes through two packing layers 7 upward, and the spray device 2 works. The nozzle 23 sprays liquid to treat the exhaust gas upward. The treated exhaust gas passes through the demister 6 upward and is discharged from the air outlet 12 to enter the next treatment process. When the waste gas passes through the first box 31, the heat is transferred to the treatment liquid in the liquid storage area 14 through multiple heat pipes 4. The tower body 1 is provided with a temperature sensor for measuring the temperature of the treatment liquid in the liquid storage area 14. When the temperature of the treatment liquid is too high, the opening of the first control valve 53 is reduced or the first control valve 53 is closed, so that the waste gas flow through the first box 31 is reduced or completely closed, thereby reducing the heat exchange of the heat pipe 4 and reducing the temperature of the treatment liquid. The waste gas directly passes through the second box 32 below and then directly enters the tower body 1. Since the second box 32 and the tower body 1 are separated by a closed second box 31, the waste gas heat will not be transferred to the treatment liquid, which is suitable for use in summer or when the ambient temperature is high. When the temperature of the treatment liquid is too low, the opening of the second control valve 54 is reduced or the second control valve 54 is closed, so that the waste gas flow through the second box 32 is reduced or completely closed, the waste gas flow in the first box 31 is increased, the heat exchange of the heat pipe 4 is increased, and the temperature of the treatment liquid is increased, which is suitable for use in winter or when the ambient temperature is low. The waste gas and the treatment liquid are heat exchanged, and the temperature of the treatment liquid in the liquid storage area 14 is controlled by controlling the opening of the first control valve 53 and the second control valve 54, so that the temperature of the treatment liquid is maintained in an appropriate range to ensure the treatment effect of the washing tower on the waste gas.

[0026] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A waste gas spray tower with controllable treatment liquid temperature, characterized in that: The invention comprises a tower body (1), a spray device (2) arranged on the tower body (1), an exhaust gas box (3) connected to the tower body (1), and a heat pipe (4) arranged on the exhaust gas box (3); the bottom of the tower body (1) is a liquid storage area (14) for storing a treatment liquid; an air inlet pipe (11) and an air outlet pipe (12) are arranged on the tower body (1); a first inlet pipe (51) and a first outlet pipe (52) are connected to the exhaust gas box (3); the first outlet pipe (52) is communicated with the air inlet pipe (11); the heat pipe (4) comprises an evaporation section (41) and a condensation section (42); the evaporation section (41) is located in the exhaust gas box (3), and the condensation section (42) is located in the liquid storage area (14).

2. The waste gas spray tower with controllable treatment liquid temperature according to claim 1, characterized in that: The exhaust gas box (3) comprises a first box body (31) connected to the bottom wall of the tower body (1) and a second box body (32) connected to the first box body (31); the evaporation section (41) is located in the first box body (31); the first inlet pipe (51) comprises a first inlet branch pipe (511) connected to the first box body (31) and a second inlet branch pipe (512) connected to the second box body (32); the first outlet pipe (52) comprises a first outlet branch pipe (521) connected to the first box body (31) and a second outlet branch pipe (522) connected to the second box body (32).

3. The waste gas spray tower with controllable treatment liquid temperature according to claim 2, characterized in that: The first inlet branch pipe (511) is provided with a first control valve (53), and the second inlet branch pipe (512) is provided with a second control valve (54).

4. The waste gas spray tower with controllable treatment liquid temperature according to claim 1, characterized in that: The evaporation section (41) is provided with a first fin, and the condensation section (42) is provided with a second fin.

5. The waste gas spray tower with controllable treatment liquid temperature according to claim 1, characterized in that: The tower body (1) comprises a water tank (13) for expanding the volume of the inner bottom.

6. The waste gas spray tower with controllable treatment liquid temperature according to claim 1, characterized in that: The spray device (2) comprises a water pump (21) connected to the tower body (1), a spray pipe (22) connected to the water pump (21), and a spray head (23) arranged on the spray pipe (22) and arranged in the tower body (1); a packing layer (7) is provided in the tower body (1).

7. The waste gas spray tower with controllable treatment liquid temperature according to claim 1, characterized in that: The air inlet pipe (11) is connected to the side wall of the tower body (1), and the air outlet (12) is connected to the top of the tower body (1).

8. The waste gas spray tower with controllable treatment liquid temperature according to claim 1, characterized in that: A heat-insulating layer (15) is provided on the tower body (1).

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