An exhaust gas spray tower with controllable temperature of the treatment liquid

Abstract

The present invention discloses an exhaust gas spray tower with a controllable temperature of the treatment liquid, belonging to the technical field of spray towers. The spray tower includes a tower body, a spray device, an exhaust gas box, and a heat pipe. The bottom inside the tower body is a liquid storage area for storing the treatment liquid. An air inlet pipe and an air outlet pipe are provided on the tower body. A first inlet pipe and a first outlet pipe are connected to the exhaust gas box, and the first outlet pipe is communicated with the air inlet pipe. The heat pipe includes an evaporation section and a condensation section. The evaporation section is located inside the exhaust gas box, and the condensation section is located inside the liquid storage area. The present invention utilizes the heat pipe to transfer the heat of the exhaust gas to the treatment liquid in the liquid storage area, utilizes the waste heat of the exhaust gas to heat the treatment liquid, which is efficient, safe and energy-saving; the heat pipe is directly inserted into the liquid storage area, and the overall heating of the treatment liquid can be completed without the aid of conveying equipment such as a water pump, saving energy and reducing consumption; by controlling the gas flow rate in the first box body and the second box body, the temperature of the treatment liquid in the liquid storage area is controlled, so that the temperature of the treatment liquid is maintained within a suitable range, ensuring the treatment effect of the exhaust gas.

Description

Technical Field

[0001] The present invention belongs to the technical field of spray towers, and particularly relates to an exhaust gas spray tower with a controllable temperature of the treatment liquid. Background Art

[0002] An exhaust gas spray tower is a device for treating exhaust gas. By introducing the exhaust gas into the tower and using a spraying device, treatment liquids such as acid solutions or alkaline solutions are sprayed according to the type of exhaust gas to treat the exhaust gas, achieving the effect of purifying the exhaust gas. Existing exhaust gas spray towers are generally used outdoors, and the temperature of the treatment liquid affects the treatment effect of the exhaust gas. When the temperature of the treatment liquid is too low, it may cause an increase in viscosity, resulting in a weakened spraying effect. In winter, if the treatment liquid freezes, 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, and too high a temperature will cause the acid solution or alkaline solution to volatilize, thereby affecting the purification effect of the exhaust gas. Summary of the Invention

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

[0004] Technical Solution: To solve the above technical problems, the technical solution adopted by the present invention is as follows:

[0005] An exhaust gas spray tower with a controllable temperature of the treatment liquid, comprising a tower body, a spraying device arranged on the tower body, an exhaust gas box connected to the tower body, and a heat pipe arranged on the exhaust gas box. The bottom inside the tower body is a liquid storage area for storing the treatment liquid. The tower body is provided with an intake pipe and an outlet pipe. The exhaust gas box is connected with a first inlet pipe and a first outlet pipe. The first outlet pipe is communicated with the intake pipe. The heat pipe includes an evaporation section and a condensation section. The evaporation section is located inside the exhaust gas box, and the condensation section is located inside 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 inside 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. 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, a first control valve is arranged on the first inlet branch pipe, and a second control valve is arranged on the second inlet branch pipe.

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

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

[0010] Preferably, the spraying device includes a water pump connected to the tower body, a spray pipe connected to the water pump, and spray heads provided on the spray pipe and inside the tower body. A packing layer is provided inside the tower body.

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

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

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

[0014] 1. By providing an exhaust gas box below the tower body and heat pipes provided on the exhaust gas box, with the evaporation end of the heat pipe located inside the exhaust gas box and the condensation section of the heat pipe located in the liquid storage area of the tower body, the heat of the exhaust gas is transferred to the treatment liquid in the liquid storage area by the heat pipe. The heat conduction efficiency of the heat pipe is high, and the waste heat of the exhaust gas is used to heat the treatment liquid without using an external electric heater, 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 need for conveying equipment such as a water pump, 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. Control valves are respectively provided on the first inlet branch pipe and the second inlet branch pipe. The flue gas flow rate in the corresponding pipeline and box body can be controlled by the opening degree of the control valve, so as to control the flue gas flow rate entering the first box body and the second box body. By controlling the flue gas flow rate in the first box body and the second box body, the temperature of the treatment liquid in the liquid storage area is controlled, so that the temperature of the treatment liquid is maintained within a suitable range, ensuring the treatment effect of the exhaust gas. Description of the Drawings

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

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

[0019] Figure 3 is a working principle diagram of the heat pipe. Detailed Embodiments

[0020] The following combines specific embodiments to further clarify the present invention. The embodiments are implemented on the premise of the technical solution of the present invention. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention.

[0021] As shown Figure 1 , an exhaust gas spray tower with controllable treatment liquid temperature includes a tower body 1, a spray device 2, an exhaust gas box 3, and a heat pipe 4. The main body of the tower body 1 is cylindrical. An intake pipe 11 and an outlet pipe 12 are provided on the tower body 1. The intake pipe 11 is connected to the side wall of the tower body 1 near the lower end, and the outlet pipe 12 is connected to the middle position at the top of the tower body 1. The bottom inside the tower body 1 is a liquid storage area 14 for storing the treatment liquid. A water tank 13 is provided at the lower end of the tower body 1 to expand the volume of the bottom inside the tower body 1. The space inside the water tank 13 also belongs to the liquid storage area 14. During use, the liquid level height of the treatment liquid in the liquid storage area 14 is approximately three - quarters of the height of the water tank 13. According to the types of exhaust gas to be treated, the treatment liquid is selected as acid liquid or alkali liquid. A heat insulation layer 15 is provided on the tower body 1, and the heat insulation layer 15 uses existing heat insulation materials such as rock wool boards to reduce the heat exchange between the inside and outside of the tower body 1. An eliminator 6 is provided near the top inside the tower body 1. The eliminator 6 uses an existing baffle eliminator to separate the droplets from the gas.

[0022] As shown Figure 1 , the spray device 2 is arranged on the tower body 1. 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 13. The inlet end of the water pump 21 is communicated with the liquid storage area 14 through an inlet pipe. The spray pipe 22 is arranged inside the tower body 1 and there are two spray pipes 22 arranged up and down. The two spray pipes 22 are connected to the outlet end of the water pump 21. A plurality of nozzles 23 are provided. The plurality of nozzles 23 are arranged on the spray pipe 22 and are used for spraying liquid downward. The water pump 21 transports the treatment liquid in the liquid storage area 14 to the nozzles 23 for spraying to treat the exhaust gas. A packing layer 7 is provided below each spray pipe 22 inside the tower body 1. The packing layer 7 includes a plurality of spherical packings. The nozzles 23 spray the treatment liquid towards the packing layer 7. The spherical packings can increase the contact area between the gas and the liquid and improve the treatment effect of the exhaust gas. The treatment liquid falling from the packing layer 7 returns to the liquid storage area 14.

[0023] As shown Figure 1 and Figure 2As shown, the exhaust gas box 3 is connected to the bottom wall of the tower body 1. The exhaust gas 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 gas box 3 is connected with a first inlet pipe 51, and the other end of the exhaust gas box 3 is connected with a first outlet pipe 52. The first outlet pipe 52 is communicated with the intake pipe 11. The first inlet pipe 51 is used for accessing an external exhaust gas source. The external exhaust gas enters the tower body 1 through the exhaust gas box 3, the first outlet pipe 52 and the intake 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. A first control valve 53 is arranged on the first inlet branch pipe 511, and a second control valve 54 is arranged on the second inlet branch pipe 512. Both the first control valve 53 and the second control valve 54 adopt butterfly valves. The opening degree of the butterfly valve can control the flue gas flow in the corresponding pipeline and box body, so as to control the flue gas flow entering the first box body 31 and the second box body 32.

[0024] As Figure 1 , Figure 2 and Figure 3 shown, heat pipes 4 are arranged on the exhaust gas box 3. There are multiple heat pipes 4. The heat pipes 4 adopt existing cylindrical heat pipes. The heat pipes 4 include 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 adiabatic 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 method, which is convenient for replacement. The heat pipe 4 includes a pipe shell and a wick 402. The pipe shell is made of stainless steel. The wick 402 is arranged on the inner wall of the pipe shell. The wick 402 is formed by sintering copper powder. An appropriate liquid is filled in the pipe shell. When exhaust gas enters the first box body 31, the evaporation section 41 is heated, and the liquid in the pipe shell quickly vaporizes. The vapor rises upward and condenses at the upper condensation section 42 to release heat. The liquid then flows back to the evaporation section 41 along the wick 402 under the action of capillary force, and so on in a cycle. Thus, the heat of the exhaust gas is used to heat the treatment liquid in the liquid storage area 14. In order to improve the heat exchange effect, a first fin (not shown in the figure) is arranged on the evaporation section 41 to increase the contact area between the exhaust gas and the evaporation section 41. The first fin adopts a rectangular sheet and is parallel to the air flow direction in the first box body 31. A second fin (not shown in the figure) is arranged on the condensation section 42 to increase the contact area between the treatment liquid and the condensation section 42.

[0025] When the scrubbing tower of this embodiment is in use, the high-temperature waste gas to be processed is connected to the first inlet pipe 51. The first control valve 53 and the second control valve 54 are opened. The waste gas passes through the first box body 31 and the second box body 32 and then enters the tower body 1 from the first outlet pipe 52 and the intake pipe 11. The waste gas passes upward through two packing layers 7, and the spraying device 2 works. The nozzles 23 spray liquid to treat the upward waste gas. After the treated waste gas passes upward through the demister 6, it is discharged from the air outlet 12 and enters the next treatment process. When the waste gas passes through the first box body 31, heat is transferred to the treatment liquid in the liquid storage area 14 through a plurality of heat pipes 4. A temperature sensor is provided on the tower body 1 to measure the temperature of the treatment liquid in the liquid storage area 14. When the temperature of the treatment liquid is too high, the opening degree of the first control valve 53 is reduced or the first control valve 53 is closed, so that the waste gas flow rate passing through the first box body 31 is reduced or completely closed, thereby reducing the heat exchange of the heat pipes 4 and lowering the temperature of the treatment liquid. The waste gas directly passes through the second box body 32 below and then directly enters the tower body 1. Since there is a closed second box body 31 between the second box body 32 and the tower body 1, 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 relatively high. When the temperature of the treatment liquid is too low, the opening degree of the second control valve 54 is reduced or the second control valve 54 is closed, so that the waste gas flow rate passing through the second box body 32 is reduced or completely closed, and the waste gas flow rate in the first box body 31 increases, increasing the heat exchange of the heat pipes 4 and raising the temperature of the treatment liquid, which is suitable for use in winter or when the ambient temperature is relatively low. The waste gas is used for heat exchange with the treatment liquid, and the temperature of the treatment liquid in the liquid storage area 14 is controlled by controlling the opening degrees of the first control valve 53 and the second control valve 54, so that the temperature of the treatment liquid is maintained within a suitable range, ensuring the treatment effect of the scrubbing tower on the waste gas.

[0026] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. An exhaust gas spray tower with a controllable temperature of the treatment liquid, characterized in that, It includes a tower body (1), a spraying 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 inside the tower body (1) is a liquid storage area (14) for storing 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) includes an evaporation section (41) and a condensation section (42). The evaporation section (41) is located inside the exhaust gas box (3), and the condensation section (42) is located inside the liquid storage area (14). The exhaust gas box (3) includes 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 inside the first box body (31). 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).

2. The exhaust gas spray tower with controllable processing liquid temperature according to claim 1, characterized in that, A first control valve (53) is arranged on the first inlet branch pipe (511), and a second control valve (54) is arranged on the second inlet branch pipe (512).

3. The exhaust gas spray tower with controllable processing liquid temperature according to claim 1, characterized in that First fins are arranged on the evaporation section (41), and second fins are arranged on the condensation section (42).

4. The exhaust gas spray tower with controllable processing liquid temperature according to claim 1, characterized in that The tower body (1) includes a water tank box (13) for expanding the volume of the inner bottom part.

5. The exhaust gas spray tower with a controllable processing liquid temperature according to claim 1, characterized in that, The spraying device (2) includes a water pump (21) connected to the tower body (1), a spraying pipe (22) connected to the water pump (21), and spray heads (23) arranged on the spraying pipe (22) and inside the tower body (1). A packing layer (7) is arranged inside the tower body (1).

6. The exhaust gas spray tower with controllable processing 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).

7. The exhaust gas spray tower with controllable processing liquid temperature according to claim 1, characterized in that, A heat insulation layer (15) is arranged on the tower body (1).

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