Spraying system for cooling flue gas

Abstract

The utility model discloses a spraying system for cooling flue gas, which comprises a cooling tank, a spraying device, a flue gas inlet pipe and a flue gas outlet pipe are arranged on the cooling tank, the flue gas inlet pipe is used for being externally connected with a flue gas outlet device of waste incineration equipment, a spiral channel and a central channel are arranged in the cooling tank, a gas-water separation cavity is arranged at the lower end of the cooling tank, and the gas-water separation cavity is communicated with the flue gas inlet pipe. The spraying device and the smoke inlet pipe are respectively communicated with one end of the spiral channel, the spraying device is externally connected with a water source and is used for spraying water mist into the spiral channel, the other end of the spiral channel is communicated with the gas-water separation cavity, one end of the central channel is communicated with the gas-water separation cavity, and the other end of the central channel is communicated with the smoke inlet pipe. And the other end of the smoke pipe is communicated with the smoke outlet pipe. Water mist sprayed by the spraying device is mixed with flue gas, so that the flue gas can be cooled and purified, the secondary pollution is reduced, and the risk that a fire is ignited by the flue gas is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to garbage incineration system technical field, concretely relates to a kind of for the spray system of flue gas cooling. BACKGROUND

[0002] With the high-speed development of our country economy and material level improvement, "garbage around city" is the problem that most domestic cities face, if not effectively disposed, it will cause serious pollution to environment.Currently garbage disposal mode is mainly landfill, but it has the shortcomings of occupying much land, leachate is difficult to handle, secondary pollution of surrounding environment etc.Garbage incineration method can make garbage 90% reduction, 70%-80% reduction, greatly reduce the land area occupied, meet the requirement of reduction;Therefore, in recent years, many cities have introduced relevant garbage incineration equipment, and handle municipal solid waste by incineration method.

[0003] Garbage will produce a large amount of flue gas in incineration process, the existing garbage incineration equipment lacks device for cooling and purifying flue gas, usually flue gas after garbage incineration is directly discharged to atmosphere, which not only causes secondary pollution to environment, but also high-temperature flue gas directly discharged has the risk of causing fire by igniting external objects. SUMMARY

[0004] In order to solve part or all problems existing in the prior art, the utility model provides a kind of for the spray system of flue gas cooling, including cooling tank, be equipped with spray device, flue inlet pipe and flue outlet pipe on the cooling tank, the flue inlet pipe is used to connect the flue outlet device of garbage incineration equipment, spiral channel and central passage are equipped in the cooling tank, the lower end of the cooling tank is equipped with gas-water separation cavity, the spray device and flue inlet pipe are connected with one end of the spiral channel respectively, the spray device is connected with water source, for spraying water mist in the spiral channel, the other end of the spiral channel is connected with the gas-water separation cavity, one end of the central passage is connected with the gas-water separation cavity, and the other end is connected with the flue outlet pipe.

[0005] As a further improvement of the utility model, the cooling tank includes flue inlet tank, flue outlet tank and transition tank with same structure, spiral channel and central passage are equipped in the flue inlet tank, flue outlet tank and transition tank, the flue inlet pipe is connected with the spiral channel of the flue inlet tank, the flue outlet pipe is connected with the central passage of the flue outlet tank, the central passage of the flue inlet tank is connected with the spiral channel of the transition tank, and the spiral channel of the flue outlet tank is connected with the central passage of the transition tank.

[0006] As a further improvement of the utility model, the number of transition tanks is four, and the central passage of the first transition tank is connected with the spiral channel of the next transition tank.

[0007] As a further improvement of the utility model, still include installation main body, the spraying device and the cooling tank are connected with installation main body respectively, the corresponding position of each spiral channel on installation main body is equipped with gas water mixing cavity respectively.

[0008] As a further improvement of the utility model, the spraying device includes a spray pipe, the spray pipe is connected with a water source, and a spray head is arranged at the corresponding position of the gas water mixing cavity on the spray pipe.

[0009] As a further improvement of the utility model, still include water collecting tank, the water collecting tank is connected with the cooling tank, the inner chamber of water collecting tank is communicated with the gas water separation cavity, and a drain pipe is arranged on the water collecting tank.

[0010] As a further improvement of the utility model, the water collecting tank is in the shape of a funnel with a large upper end and a small lower end, and the drain pipe is arranged at the lower end of the water collecting tank.

[0011] As a further improvement of the utility model, a valve is arranged on the drain pipe.

[0012] Compared with the prior art, the utility model has the advantages that:

[0013] The spraying device sprays water mist, which can reduce the temperature of the flue gas and purify the flue gas to some extent. The flue gas after temperature reduction and purification is discharged through the smoke outlet pipe. The temperature of the flue gas after temperature reduction and purification is not high, which can reduce the risk of fire caused by the flue gas discharge igniting external objects. In addition, the particulate matter in the flue gas can be removed after purification by the water mist, so that the discharged flue gas meets the environmental protection standard and the occurrence of secondary pollution is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the scheme of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0015] Figure 1 is a schematic diagram of the external structure of an embodiment of the utility model;

[0016] Figure 2 is a schematic diagram of the side view structure of an embodiment of the utility model;

[0017] Figure 3 is Figure 2 a schematic diagram of the cross-sectional structure of A-A in the above figure;

[0018] Figure 4 is a schematic diagram of the internal structure of an embodiment of the present application. DETAILED DESCRIPTION

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the specification is for describing particular embodiments only and is not intended to be limiting of the application; the present application is well suited to carry out various embodiments as broadly described herein and the above and below described features and combinations thereof are meant to be included within the scope of the present application; the terms "first", "second" and the like, as used in the description of embodiments, are used for distinguishing between similar elements and not necessarily for describing a specific sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in other sequences than described or otherwise illustrated herein.

[0020] Reference to "an embodiment" or "the embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. The appearances of the phrase "in one embodiment" or "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily referring to a single, "preferred" embodiment. As such, the application described herein contemplates embodiments that include the particular features, structures, or characteristics described in connection with the embodiments.

[0021] In order to make the technical personnel in the technical field better understand the technical scheme of the present application, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings.

[0022] As shown in Figures 1-4 A spraying system for cooling flue gas, which is used in combination with a waste incineration device, is used for cooling and purifying flue gas discharged by the waste incineration device. The spraying system comprises a cooling tank, a spraying device, an inlet flue pipe 1 and an outlet flue pipe 2 are arranged on the cooling tank, the inlet flue pipe 1 is used for connecting an outlet flue device of the waste incineration device, a spiral channel 100 and a central channel 200 are arranged in the cooling tank, a gas-water separation cavity 300 is arranged at the lower end of the cooling tank, the spraying device and the inlet flue pipe 1 are respectively connected with one end of the spiral channel 100, the spraying device is connected with a water source, and is used for spraying water mist into the spiral channel 100, the other end of the spiral channel 100 is connected with the gas-water separation cavity 300, one end of the central channel 200 is connected with the gas-water separation cavity 300, and the other end of the central channel 200 is connected with the outlet flue pipe 2.

[0023] When the device is in operation, flue gas generated by the waste incineration device flows into the spiral channel 100 through the flue inlet pipe 1, and water mist is sprayed into the spiral channel 100 through the spraying device. The water mist mixes with the flue gas and then flows in the spiral channel 100. On the one hand, the water mist can cool the flue gas, achieving the purpose of cooling the flue gas. On the other hand, the water mist can mix with the particulate matters in the flue gas and take away the particulate matters in the flue gas, achieving the purpose of purifying the flue gas. When the gas-water mixture flows into the gas-water separation chamber 300, the water continues to flow downward under the action of gravity, and the flue gas purified by the water mist flows upward through the central channel 200, and then is discharged from the flue outlet pipe 2.

[0024] When the spraying system for cooling flue gas is in operation, the water mist sprayed by the spraying device mixes with the flue gas. On the one hand, the water mist can cool the flue gas, so that the temperature of the flue gas discharged from the flue outlet pipe 2 is appropriate, avoiding the risk of fire caused by high-temperature flue gas. On the other hand, the water mist can remove the particulate matters in the flue gas, purifying the flue gas, so that the flue gas discharged through the flue outlet pipe 2 meets the environmental protection requirements and reduces secondary pollution.

[0025] In order to collect the sewage flowing out of the gas-water separation chamber 300, a water collecting tank 3 is installed at the lower end of the cooling tank. The water collecting tank 3 has a funnel shape with a large upper end and a small lower end. The inner cavity of the water collecting tank 3 is connected to the gas-water separation chamber 300, and a drain pipe 4 is arranged at the lower end of the water collecting tank 3. When the sewage continues to flow downward through the gas-water separation chamber 300, it flows into the water collecting tank 3 and then flows out of the water collecting tank 3 through the drain pipe 4.

[0026] In this embodiment, a valve 5 is installed on the drain pipe 4. Under normal circumstances, the valve 5 is closed. When it is necessary to discharge the sewage in the water collecting tank 3, the valve 5 can be opened, and then the sewage in the water collecting tank 3 can be discharged through the drain pipe 4.

[0027] The cooling system comprises an identically structured inlet tank 6, a transition tank 7, and an outlet tank 8. Each of these three tanks contains a spiral channel 100 and a central channel 200. The inlet pipe 1 connects to the spiral channel 100 of the inlet tank 6, the outlet pipe 2 connects to the central channel 200 of the outlet tank 8, the central channel 200 of the inlet tank 6 connects to the spiral channel 100 of the transition tank 7, and the spiral channel 100 of the outlet tank 8 connects to the central channel 200 of the transition tank 7. By using multiple cooling tanks, the residence time of the flue gas within the spray system can be extended, thereby improving the purification and cooling effects. In actual operation, the flue gas first passes through the spiral channel 100 of the inlet smoke tank 6, where it mixes with the water mist sprayed by the spray device for the first stage of cooling and purification. Then, the flue gas flows out through the central channel 200 of the inlet smoke tank 6, and then enters through the spiral channel 100 of the transition tank 7, where it mixes again with the water mist sprayed by the spray device for the second stage of cooling and purification. After that, the flue gas flows out through the central channel 200 of the transition tank 7, and then enters through the spiral channel 100 of the outlet smoke tank 8, where it mixes again with the water mist sprayed by the spray device for the third stage of cooling and purification. Finally, the flue gas flows out through the central channel 200 of the outlet smoke tank 8 to the outlet pipe 2, and is discharged from the spray system.

[0028] In this embodiment, there are four transition tanks 7, and the central channel 200 of the previous transition tank 7 is connected to the spiral channel 100 of the next transition tank 7; the spiral channel 100 of the first transition tank 7 is connected to the central channel 200 of the smoke inlet tank 6, and the central channel 200 of the last transition tank 7 is connected to the spiral channel 100 of the smoke outlet tank 8. By setting four transition tanks 7, the residence time of the flue gas in the spray system can be further increased, thereby improving the cooling and purification effect. In other embodiments, the number of transition tanks 7 can also be any other number.

[0029] like Figure 1 , Figure 3 As shown, the spray system for cooling flue gas also includes an installation body 9. The inlet tank 6, outlet tank 8, and transition tank 7 are fixedly connected to the installation body 9. The spray device is also installed on the installation body 9. The installation body 9 is provided with air-water mixing chambers 91 at corresponding positions of the spiral channels 100 of each cooling tank. By setting up independent air-water mixing chambers 91, the water mist sprayed by the spray device can better contact and mix with the flue gas, and at the same time, it prevents the flue gas from the later cooling tank from flowing back into the earlier cooling tank, ensuring that the flue gas can flow along the predetermined path and improving the stability of the operation.

[0030] The spraying device comprises spraying pipes 10, which are respectively installed on the installation body 9, and are connected with a water source, and each of the spraying pipes 10 is provided with a spray head 11 at a position corresponding to each air-water mixing cavity 91. During operation, the water source is connected with the spraying pipes 10, and the water is atomized by the spray heads 11 and sprayed into each air-water mixing cavity 91. When the flue gas flows into the spiral channel 100, the flue gas is mixed with the water mist, and the flue gas is cooled and purified by the water mist.

[0031] The spraying system for cooling flue gas can cool and purify the flue gas in multiple stages by arranging multiple cooling tanks and installing the spraying device on the installation body 9, so that the flue gas discharged through the flue gas outlet pipe 2 can meet the environmental protection requirements and avoid secondary pollution. Meanwhile, the temperature of the flue gas discharged through the flue gas outlet pipe 2 is appropriate after multiple-stage cooling, so as to eliminate the risk of fire caused by high-temperature flue gas.

[0032] The above specific embodiment is a preferred embodiment of the present application, and is not intended to limit the specific implementation range of the present application. The scope of the present application includes but is not limited to the specific embodiment, and any equivalent changes made in accordance with the present application are within the protection scope of the present application.

Claims

1. A spray system for cooling flue gas, characterized by: The cooling tank is provided with a spraying device, an inlet pipe and an outlet pipe, the inlet pipe is used to connect the outlet device of the waste incineration equipment, the cooling tank is provided with a spiral channel and a central channel, the lower end of the cooling tank is provided with a gas-water separation cavity, the spraying device and the inlet pipe are respectively connected with one end of the spiral channel, the spraying device is connected with a water source and used to spray water mist into the spiral channel, the other end of the spiral channel is connected with the gas-water separation cavity, one end of the central channel is connected with the gas-water separation cavity, and the other end is connected with the outlet pipe.

2. The spray system for cooling flue gas according to claim 1, characterized in that: The cooling tank includes an inlet tank, an outlet tank and a transition tank with the same structure, the inlet tank, the outlet tank and the transition tank are provided with a spiral channel and a central channel, the inlet pipe is connected with the spiral channel of the inlet tank, the outlet pipe is connected with the central channel of the outlet tank, the central channel of the inlet tank is connected with the spiral channel of the transition tank, and the spiral channel of the outlet tank is connected with the central channel of the transition tank.

3. The spray system for cooling flue gas according to claim 2, characterized in that: The number of the transition tanks is four, and the central channel of a first transition tank is connected with the spiral channel of a second transition tank.

4. The spray system for cooling flue gas according to claim 2, characterized in that: The spraying device and the cooling tank are connected with a mounting body, and the mounting body is provided with a gas-water mixing cavity at a position corresponding to each spiral channel.

5. The spray system for cooling flue gases according to claim 4, characterized in that: The spraying device includes a spraying pipe connected with a water source, and the spraying pipe is provided with a nozzle at a position corresponding to the gas-water mixing cavity.

6. A spray system for cooling flue gases according to any one of claims 1-5, characterized in that: The cooling tank is connected with a water collecting tank, the inner cavity of the water collecting tank is connected with the gas-water separation cavity, and the water collecting tank is provided with a drain pipe.

7. The spray system for cooling flue gases according to claim 6, characterized in that: The water collecting tank has a funnel shape with a large upper end and a small lower end, and the drain pipe is arranged at the lower end of the water collecting tank.

8. The spray system for cooling flue gas according to claim 6, characterized in that: The drain pipe is provided with a valve.

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