Spraying and cooling integrated device for tail gas

Abstract

The utility model discloses a tail gas spraying and cooling integrated device, and relates to the technical field of tail gas treatment. The device comprises a spray tower, a cyclone separation assembly and a heat exchange box, a plurality of spray pipes are clamped on the edge of the bottom of the spray tower in a penetrating manner, the cyclone separation assembly is arranged in the spray tower, an exhaust pipe is welded at one end of the cyclone separation assembly in a penetrating manner, and the heat exchange box is fixedly clamped on the peripheral surface of the cyclone separation assembly. Through the arrangement of the spray tower, the cyclone separation assembly and the heat exchange box, the problems that sprayed waste liquid often exchanges heat with tail gas again, the temperature is high, efficient heat exchange with the tail gas in a quench cooler is difficult, a cooling structure and a spray structure are often separately arranged, the occupied space of the device is large, and the cost is low are solved. Heat in the tail gas can be dissipated in the conveying process, and due to the fact that the flow speed of the tail gas is high, solid particles in the tail gas cannot be efficiently removed only through spraying liquid.

Description

Technical Field

[0001] The utility model belongs to the technical field of tail gas treatment, and particularly relates to an integrated spray cooling device for tail gas. Background Art

[0002] In the process of industrial production, especially after burning solid fuels in combustion furnaces, a large amount of exhaust gas is often generated. In order to avoid the pollution of the exhaust gas to the environment, recover the heat in the exhaust gas and improve the energy utilization rate, a spray cooling integrated device is usually used to spray and heat exchange the exhaust gas. Spray cooling is a method of dissipating heat by spraying cooling water on the heat source. The cooling water is drawn from the water tank and then pumped to the nozzle for spraying. The spray water contacts the exhaust gas for heat exchange, so that the exhaust gas is quickly cooled. The spray cooling system is simple, reliable, low-cost, and easy to maintain, but it still has the following disadvantages in actual use:

[0003] 1. The utility model with publication number CN214635361U discloses an integrated tower device for quenching and spraying tail gas of a mining reduction furnace, wherein the bottom of the quench cooler is connected to the side wall of the spray tower through an elbow; the connection between the rear flue of the elbow and the spray tower has a downward inclination of 7-9° relative to the horizontal plane; the upper port of the quench cooler is a flue gas inlet, the side wall is connected to at least one spray gun, and the side wall of the spray gun is connected to a compressed gas source; a branch pipeline is extended from the spray circulation pipeline of the spray tower to the spray gun, and the waste liquid in the spray tower is used as a cooling material in the quench cooler, which can save energy and reduce the generation of wastewater, but when the tail gas passes through the spray tower, it will exchange heat with the sprayed liquid again, resulting in an increase in the temperature of the waste liquid entering the quench cooler, which in turn makes it difficult to efficiently cool the tail gas in the quench cooler, and the actual cooling effect is not good;

[0004] 2. The integrated spray cooling device usually has a cooling structure and a spray structure separately set up, which not only causes the device to occupy a larger space, but also causes a large amount of heat to be lost in the transportation process when the exhaust gas passes through the device, reducing the heat recovery efficiency. In addition, due to the fast flow speed of the exhaust gas, it is difficult to filter out all the solid particles contained in it by spraying liquid alone, and the exhaust gas treatment efficiency is poor. Utility Model Content

[0005] The utility model aims to provide an integrated spray cooling device for exhaust gas, which solves the problem that when the integrated spray cooling device for exhaust gas is in use, the waste liquid after spraying often exchanges heat with the exhaust gas again, and the temperature is high, making it difficult to carry out efficient heat exchange with the exhaust gas in the quench cooler, the cooling structure and the spray structure are often arranged separately, the device occupies a large space, the heat in the exhaust gas will be lost during the transportation process, and due to the fast flow rate of the exhaust gas, it is difficult to efficiently remove solid particles in the exhaust gas by spraying liquid alone.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model is an integrated spray cooling device for tail gas, comprising a spray tower, a cyclone separation component and a heat exchange box, wherein a plurality of spray pipes are inserted and connected at the bottom edge of the spray tower, a cyclone separation component is arranged in the spray tower, an exhaust pipe is inserted and welded at one end of the cyclone separation component, and a heat exchange box is fixed and connected to the outer peripheral surface of the cyclone separation component;

[0008] The exhaust gas in the cyclone separation component is evacuated through the exhaust pipe to generate negative pressure therein, so that the exhaust gas can quickly enter the cyclone separation component, and the exhaust gas is initially separated from the gas and solid by the cyclone separation component. At the same time, cooling water quickly passes through the heat exchange box, and the cooling water and the exhaust gas passing through the cyclone separation component exchange heat to quickly cool the exhaust gas. The cooled exhaust gas enters the spray tower through the exhaust pipe, and the reaction reagent is sprayed into the spray tower through the spray pipe, so that the exhaust gas and the reaction reagent react, and the exhaust gas can exchange heat with the reaction reagent. At the same time, the exhaust gas contacts the outer wall of the heat exchange box, so that the exhaust gas exchanges heat with the water in the heat exchange box again, so as to cool the exhaust gas to the greatest extent and avoid heat loss. At the same time, the reaction reagent can retain the tiny solid particles in the exhaust gas again, so as to ensure that the exhaust gas can be efficiently filtered, heat-exchanged and reacted in a limited space, thereby greatly improving the exhaust gas treatment efficiency.

[0009] Furthermore, an exhaust pipe is welded through the top of the outer peripheral surface of the spray tower, a plurality of heat dissipation fins are welded and fixed to the outer peripheral surface of the exhaust pipe, a drain pipe is welded through the bottom of the outer peripheral surface of the spray tower, a plurality of connecting pipes are clamped through the bottom of the spray pipes, and a first slow flow plate is welded and fixed to the inner edge of the spray tower;

[0010] After the exhaust gas enters the spray tower, the reaction reagent is sprayed into the spray tower through the spray pipe, so that the exhaust gas and the reaction reagent react, and the exhaust gas can exchange heat with the reaction reagent. The time for the exhaust gas to pass through the spray tower can be extended by the first slow flow plate to ensure sufficient reaction between the exhaust gas and the reaction reagent. The exhaust gas is discharged through the exhaust pipe after sufficient filtration, heat exchange and reaction. The exhaust gas passing through the exhaust pipe can be further cooled by the heat dissipation fins, so that the vaporized reaction reagent is condensed and refluxed back into the spray tower, avoiding pollution of the environment by the reaction reagent.

[0011] Furthermore, an air inlet pipe is welded through one end of the outer peripheral surface of the cyclone separation component, a high-pressure blower is clamped through the outer peripheral surface of the exhaust pipe, the air inlet pipe and the exhaust pipe are both inserted through the outer peripheral surface of the spray tower, and the inner side of the cyclone separation component is connected through the exhaust pipe and the spray tower;

[0012] By using a high-pressure fan to extract air from the cyclone separation component, negative pressure can be generated in the cyclone separation component, further allowing the exhaust gas to quickly enter the cyclone separation component, and the cyclone separation component can be used to perform preliminary gas-solid separation on the exhaust gas, thereby ensuring the exhaust gas treatment efficiency.

[0013] Furthermore, a slag discharge pipe is welded through the bottom of the cyclone separation assembly, a solenoid valve is clamped through the outer peripheral surface of the slag discharge pipe, the slag discharge pipe is inserted through the bottom of the spray tower, and the solenoid valve is located at the outer bottom of the spray tower;

[0014] After the solid particles in the exhaust gas enter the cyclone separation component, they fall into the slag discharge pipe under the action of gravity. When the exhaust gas is treated, the solenoid valve can be opened to quickly discharge the waste slag. The operation is simple and convenient, making it easy for the staff to clean up.

[0015] Furthermore, a drainage pipe is welded through the top of the outer peripheral surface of the heat exchange box, a water inlet pipe is welded through the bottom of the outer peripheral surface of the heat exchange box, a second slow flow plate is welded and fixed inside the heat exchange box, the second slow flow plate is attached to the outer peripheral surface of the cyclone separation component, and the drainage pipe and the water inlet pipe are both inserted through the outer peripheral surface of the spray tower;

[0016] When the exhaust gas passes through the cyclone separation component, cold water is pumped into the heat exchange box through the water inlet pipe, so that the cold water and the high-temperature exhaust gas passing through the cyclone separation component can exchange heat. When the exhaust gas enters the spray tower, the exhaust gas can exchange heat with the cold water again through the outer wall of the heat exchange box, thereby cooling the exhaust gas to the greatest extent and avoiding heat loss.

[0017] The utility model has the following beneficial effects:

[0018] 1. The utility model solves the problem of using the waste liquid in the spray tower as a cooling material in the quench cooler by arranging a spray tower, a cyclone separation component and a heat exchange box. Although it can save energy and reduce the generation of waste water, the exhaust gas will exchange heat with the sprayed liquid again when passing through the spray tower, resulting in an increase in the temperature of the waste liquid entering the quench cooler, which in turn makes it difficult for the exhaust gas to be efficiently cooled in the quench cooler, and the actual cooling effect is not good. When the exhaust gas enters the cyclone separation component, cold water is pumped into the heat exchange box through the water inlet pipe, so that the cold water and the high-temperature exhaust gas passing through the cyclone separation component are heat exchanged, and when the exhaust gas enters the spray tower, the treatment reagent sprayed through the spray pipe contacts and exchanges heat with the exhaust gas, and exchanges heat with the cold water again through the outer wall of the heat exchange box, so as to cool the exhaust gas to the greatest extent and avoid heat loss.

[0019] 2. The utility model solves the problem that the cooling structure and the spray structure of the integrated spray cooling device are usually separately arranged by arranging a spray tower, a cyclone separation component and a heat exchange box, which not only causes the device to occupy a large space, but also causes a large amount of heat to be lost in the transportation process when the exhaust gas passes through the device, thereby reducing the heat recovery efficiency. In addition, since the flow speed of the exhaust gas is relatively fast, it is difficult to completely filter out the solid particles contained therein by spraying liquid alone, resulting in poor exhaust gas treatment efficiency. After the exhaust gas enters the cyclone separation component, the cyclone separation component performs preliminary gas-solid separation on the exhaust gas, and the exhaust gas after preliminary filtration enters the spray tower through the exhaust pipe, and the reaction reagent is sprayed into the spray tower through the spray pipe, so that the exhaust gas and the reaction reagent react, and the reaction reagent can retain the tiny solid particles in the exhaust gas again, thereby ensuring that the exhaust gas can be efficiently filtered, heat-exchanged and reacted in a limited space, thereby greatly improving the exhaust gas treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural effect diagram of the utility model;

[0021] Figure 2 It is a schematic diagram of the structure of the utility model;

[0022] Figure 3 It is a cross-sectional view of the spray tower of the utility model;

[0023] Figure 4 This is a structural diagram of the cyclone separation component of the utility model;

[0024] Figure 5 It is the structural diagram of the heat exchange box of the utility model.

[0025] Reference numerals:

[0026] 1. Spray tower; 101. Spray pipe; 102. Connecting pipe; 103. First slow flow plate; 104. Exhaust pipe; 105. Drain pipe; 106. Heat dissipation fins; 2. Cyclone separation assembly; 201. Exhaust pipe; 202. High-pressure fan; 203. Inlet pipe; 204. Slag discharge pipe; 205. Solenoid valve; 3. Heat exchange box; 301. Drain pipe; 302. Water inlet pipe; 303. Second slow flow plate. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0028] See also Figure 1-5As shown, the utility model is an integrated spray cooling device for tail gas, comprising a spray tower 1, a cyclone separation assembly 2 and a heat exchange box 3. A plurality of spray pipes 101 are connected through the bottom edge of the spray tower 1, a cyclone separation assembly 2 is arranged in the spray tower 1, an exhaust pipe 201 is connected and welded through one end of the cyclone separation assembly 2, and a heat exchange box 3 is connected and fixed to the outer peripheral surface of the cyclone separation assembly 2;

[0029] The high-pressure fan 202 exhausts air from the cyclone separation component 2 through the exhaust pipe 201 to generate a negative pressure therein, further allowing the exhaust gas to quickly enter the cyclone separation component 2, and the cyclone separation component 2 performs preliminary gas-solid separation on the exhaust gas, and at the same time, pumps cooling water into the heat exchange box 3, so that the cooling water and the exhaust gas passing through the cyclone separation component 2 are heat exchanged, so that the exhaust gas is quickly cooled down, and the cooled exhaust gas enters the spray tower 1 through the exhaust pipe 201, and the reaction reagent is sprayed into the spray tower 1 through the spray pipe 101, so that the exhaust gas and the reaction reagent react, and the exhaust gas and the reaction reagent perform heat exchange, and at the same time, the reaction reagent can again retain the tiny solid particles in the exhaust gas, and the exhaust gas contacts the heat exchange box 3 again when moving in the spray tower 1, so that the exhaust gas again exchanges heat with the water in the heat exchange box 3, so that the exhaust gas is cooled down to the greatest extent.

[0030] Among them Figure 1-3 As shown, an exhaust pipe 104 is welded through the top of the outer peripheral surface of the spray tower 1, and a plurality of heat dissipation fins 106 are welded and fixed to the outer peripheral surface of the exhaust pipe 104. A drain pipe 105 is welded through the bottom of the outer peripheral surface of the spray tower 1, and a connecting pipe 102 is clamped through the bottom of the plurality of spray pipes 101. A first slow flow plate 103 is welded and fixed to the inner edge of the spray tower 1.

[0031] After the tail gas enters the spray tower 1, the reaction reagent is pumped into the spray pipe 101 through the connecting pipe 102, and the reaction reagent is sprayed into the spray tower 1 through the spray pipe 101, so that the tail gas and the reaction reagent react to remove harmful components in the tail gas, and the tail gas and the reaction reagent exchange heat to cool the tail gas. After sufficient filtration, heat exchange and reaction, the tail gas is discharged through the exhaust pipe 104, and the tail gas passing through the exhaust pipe 104 is further cooled by the heat dissipation fins 106, so that the vaporized reaction reagent is condensed and refluxed back into the spray tower 1, and the drain pipe 105 is opened regularly to discharge the waste liquid at the bottom of the spray tower 1.

[0032] Among them Figure 1 , 2As shown in , 4, an air inlet pipe 203 is welded through one end of the outer peripheral surface of the cyclone separation component 2, and a high-pressure fan 202 is connected through the outer peripheral surface of the exhaust pipe 201. The air inlet pipe 203 and the exhaust pipe 201 are both inserted through the outer peripheral surface of the spray tower 1. The inner side of the cyclone separation component 2 is connected to the spray tower 1 through the exhaust pipe 201. A slag discharge pipe 204 is welded through the bottom of the cyclone separation component 2. The outer peripheral surface of the slag discharge pipe 204 is inserted through the electromagnetic valve 205. The slag discharge pipe 204 is inserted through the bottom of the spray tower 1, and the electromagnetic valve 205 is located at the outer bottom of the spray tower 1.

[0033] When the exhaust gas is subjected to spray cooling treatment, air is evacuated from the cyclone separation component 2 by the high-pressure fan 202 to generate negative pressure in the cyclone separation component 2, so that the exhaust gas can quickly enter the cyclone separation component 2 through the air inlet pipe 203, and the exhaust gas is subjected to preliminary gas-solid separation by the cyclone separation component 2. The solid particles in the exhaust gas fall into the slag discharge pipe 204 under the action of gravity. When the exhaust gas treatment is completed, the solenoid valve 205 is opened to quickly discharge the waste slag.

[0034] Among them Figure 1 , 2 As shown in , 5, a drain pipe 301 is welded through the top of the outer peripheral surface of the heat exchange box 3, and a water inlet pipe 302 is welded through the bottom of the outer peripheral surface of the heat exchange box 3. A second slow flow plate 303 is welded and fixed inside the heat exchange box 3, and the second slow flow plate 303 is attached to the outer peripheral surface of the cyclone separation component 2. The drain pipe 301 and the water inlet pipe 302 are both inserted into the outer peripheral surface of the spray tower 1;

[0035] When the exhaust gas passes through the cyclone separation component 2, cold water is pumped into the heat exchange box 3 through the water inlet pipe 302, so that the cold water and the high-temperature exhaust gas passing through the cyclone separation component 2 undergo heat exchange, and the hot water is discharged through the drain pipe 301. When the exhaust gas enters the spray tower 1, the exhaust gas again exchanges heat with the cold water through the outer wall of the heat exchange box 3, so as to further cool the exhaust gas.

[0036] The specific working principle of the utility model is as follows: when the spray cooling treatment of the tail gas is carried out, the high-pressure fan 202 is used to evacuate the cyclone separation component 2, so that a negative pressure is generated in the cyclone separation component 2, and the tail gas is further quickly allowed to enter the cyclone separation component 2 through the air inlet pipe 203, and the tail gas is initially separated from the gas by the cyclone separation component 2. The solid particles in the tail gas fall into the slag discharge pipe 204 under the action of gravity, and at the same time, cold water is pumped into the heat exchange box 3 through the water inlet pipe 302, so that the cold water and the high-temperature tail gas passing through the cyclone separation component 2 are heat exchanged, and the hot water is discharged through the drain pipe 301, and the tail gas leaving the cyclone separation component 2 enters the spray tower 1 through the exhaust pipe 201, and the reaction is discharged through the connecting pipe 102. The reagent is pumped into the spray pipe 101, and the reaction reagent is sprayed into the spray tower 1 through the spray pipe 101, so that the exhaust gas and the reaction reagent react to remove harmful components in the exhaust gas, and the exhaust gas and the reaction reagent exchange heat to cool the exhaust gas. At the same time, the exhaust gas exchanges heat with cold water again through the outer wall of the heat exchange box 3 to further cool the exhaust gas. The exhaust gas after sufficient filtration, heat exchange and reaction enters the exhaust pipe 104, and the exhaust gas passing through the exhaust pipe 104 is further cooled by the heat dissipation fins 106, so that the vaporized reaction reagent is condensed and refluxed back into the spray tower 1, and the drain pipe 105 is opened regularly to discharge the waste liquid at the bottom of the spray tower 1. When the exhaust gas treatment is completed, the solenoid valve 205 is opened to quickly discharge the waste residue.

[0037] The above are only preferred embodiments of the present invention and do not limit the present invention. Any modification to the technical solutions recorded in the aforementioned embodiments and any equivalent replacement of some of the technical features therein, any modification, equivalent replacement, and improvement made are all within the protection scope of the present invention.

Claims

1. An integrated spray cooling device for tail gas, comprising a spray tower (1), a cyclone separation component (2) and a heat exchange box (3), characterized in that: A plurality of spray pipes (101) are clamped through the bottom edge of the spray tower (1), a cyclone separation assembly (2) is arranged inside the spray tower (1), an exhaust pipe (201) is welded through one end of the cyclone separation assembly (2), and a heat exchange box (3) is clamped and fixed to the outer peripheral surface of the cyclone separation assembly (2).

2. The integrated spray cooling device for tail gas according to claim 1, characterized in that: An exhaust pipe (104) is welded through the top of the outer peripheral surface of the spray tower (1), a plurality of heat dissipation fins (106) are welded and fixed to the outer peripheral surface of the exhaust pipe (104), a drain pipe (105) is welded through the bottom of the outer peripheral surface of the spray tower (1), a plurality of connecting pipes (102) are clamped through the bottoms of the spray pipes (101), and a first slow flow plate (103) is welded and fixed to the inner edge of the spray tower (1).

3. The integrated spray cooling device for tail gas according to claim 1, characterized in that: An air inlet pipe (203) is welded through one end of the outer peripheral surface of the cyclone separation component (2), a high-pressure fan (202) is inserted through the outer peripheral surface of the exhaust pipe (201), and both the air inlet pipe (203) and the exhaust pipe (201) are inserted through the outer peripheral surface of the spray tower (1), and the inner side of the cyclone separation component (2) is connected to the spray tower (1) through the exhaust pipe (201).

4. The integrated spray cooling device for tail gas according to claim 1, characterized in that: A slag discharge pipe (204) is welded through the bottom of the cyclone separation component (2), a solenoid valve (205) is inserted through the outer peripheral surface of the slag discharge pipe (204), the slag discharge pipe (204) is inserted through the bottom of the spray tower (1), and the solenoid valve (205) is located at the outer bottom of the spray tower (1).

5. The integrated spray cooling device for tail gas according to claim 1, characterized in that: A drainage pipe (301) is welded through the top of the outer peripheral surface of the heat exchange box (3), a water inlet pipe (302) is welded through the bottom of the outer peripheral surface of the heat exchange box (3), a second slow flow plate (303) is welded and fixed inside the heat exchange box (3), the second slow flow plate (303) is attached to the outer peripheral surface of the cyclone separation component (2), and the drainage pipe (301) and the water inlet pipe (302) are both inserted through the outer peripheral surface of the spray tower (1).

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