Small waste incineration flue gas cooling device

Abstract

The present invention provides a small-sized waste incineration flue gas cooling device, comprising a main body, wherein an air inlet and an air outlet are respectively provided at both ends of the main body, the air inlet is connected to the outlet of the incinerator, the air outlet is connected to the filter bag, at least two cooling modules are installed in the main body, the cooling modules are connected to each other, the water inlet of the cooling module is connected to the water inlet pipe, the water outlet of the cooling module is connected to the return pipe, and the incoming water flows from the cooling module near the air outlet to the cooling module at the air inlet. In this application, water flows from the cooling module on the end side of the main body to the cooling module on the air inlet side of the main body, and the direction of the water flow in the cooling module is opposite to the flow direction of the flue gas in the main body, thereby making the cooling faster, and the number of cooling modules and the speed of the water flow can be controlled to control the temperature of the flue gas in the flue gas cooling device. At the same time, spraying is not used for cooling, and the agglomerates in the flue gas cooling device will not clog the filter bag.

Description

Technical Field

[0001] The present invention relates to the technical field of garbage disposal, and in particular to a small-sized garbage incineration flue gas cooling device. Background Art

[0002] Small-scale waste incinerators are used to incinerate and dispose of waste in remote, sparsely populated areas. They effectively complement the current centralized, large-scale incineration and power generation methods, allowing for local, decentralized disposal of waste generated in remote areas. To meet environmental emission standards, waste must be cleared daily to avoid the generation of foul-smelling gases caused by the decay of organic matter.

[0003] Because small incinerators lack waste storage and mixing methods, the incoming waste has a high moisture content and significant periodic compositional variations. This ultimately results in flue gas emissions with large fluctuations in volume, temperature, and composition. Incinerators are equipped with a flue gas treatment device at the rear. Excessively high temperatures can burn the filter bags at the rear of the device, while excessively low temperatures can cause condensation in the flue gas, which, along with dust, can clog the filter bags.

[0004] Currently, the general method used to cool down the flue gas treatment device is to spray mist in the flue gas treatment device. This can cool down the flue gas entering the flue gas treatment device. However, the flue gas discharged from the incinerator shows large fluctuations in flue gas volume and temperature, which makes it impossible for the flue gas treatment device to accurately control the temperature of the gas discharged from the flue gas treatment device. Either the filter bag is severely damaged or the filter bag is blocked, resulting in poor flue gas treatment effect. Summary of the Invention

[0005] The present invention aims to solve the problem that the temperature fluctuation range of flue gas entering into the flue gas treatment device is relatively large and the control thereof is difficult to operate, and provides a small-sized waste incineration flue gas cooling device.

[0006] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0007] A small-scale waste incineration flue gas cooling device comprises a main body, with an air inlet and an air outlet respectively provided at both ends of the main body, the air inlet being connected to the outlet of the incinerator, and the air outlet being connected to the filter bag, at least two cooling modules being installed in the main body, the cooling modules being connected in parallel, the water inlet of the cooling module being connected to the water inlet pipe, the water outlet of the cooling module being connected to the return water pipe, and the inlet water flowing from the cooling module near the air outlet to the cooling module at the air inlet.

[0008] Preferably, the cooling module includes a first cooling module and a second cooling module, the first cooling module and the second cooling module being connected in parallel, with the first cooling module being closer to the air inlet and the second cooling module being closer to the air outlet. By providing two cooling modules in parallel, the incoming cooling water has multiple paths, rather than having to flow entirely from back to front, thus allowing the temperature near the air inlet to drop rapidly.

[0009] Preferably, the first cooling module includes a primary cooling unit and a secondary cooling unit, the primary cooling unit and the secondary cooling unit are connected in series, a first short-circuit water valve is connected between the water outlet and the water inlet of the primary cooling unit, and a second short-circuit water valve is connected between the water outlet and the water inlet of the secondary cooling unit. A control valve is provided between the water inlet and the water outlet of the primary cooling unit and the secondary cooling unit, and the two control valves in the first cooling module are connected in series.

[0010] Preferably, the second cooling module includes a three-stage cooling unit, a four-stage cooling unit, and a five-stage cooling unit. A third short-circuit water valve is connected between the water outlet and the water inlet of the three-stage cooling unit, a fourth short-circuit water valve is connected between the water outlet and the water inlet of the four-stage cooling unit, and a fifth short-circuit water valve is connected between the water outlet and the water inlet of the five-stage cooling unit. Control valves are provided at the water inlet and outlet of the three-stage cooling unit, the four-stage cooling unit, and the five-stage cooling unit. The three control valves in the second cooling module are connected in series. The entire five-stage cooling unit is provided with thermometers at the air inlet and outlet, and the number of cooling units to be opened is controlled according to the temperature difference between the two.

[0011] Preferably, the first-stage cooling unit, the second-stage cooling unit, the third-stage cooling unit, the fourth-stage cooling unit and the fifth-stage cooling unit are all equipped with vent valves. When the cooling units are not in use, the vent valves are opened to ventilate and release pressure to avoid pipe burst.

[0012] Preferably, a cleaning door is provided on the main body corresponding to each cooling unit, through which the corresponding cooling unit can be taken out for cleaning.

[0013] Preferably, at least one ash hopper is provided at the bottom of the body, and an ash discharge valve is installed at the bottom of the ash hopper.

[0014] Preferably, the cross section of the ash hopper is trapezoidal.

[0015] Compared with the prior art, the present invention has the following beneficial effects: the present application installs multiple cooling modules in the main body, water enters through the water inlet pipe and then enters each cooling module and finally flows back from the return pipe, and the water flows from the cooling module on the end side of the main body to the cooling module on the air inlet side of the main body, which means that the direction of water flow in the cooling module is opposite to the flow direction of the flue gas in the main body, so the cooling can be faster, and the number of cooling modules can be controlled to control the temperature of the flue gas in the flue gas cooling device. For example, if the temperature of the air inlet is too high or the gas volume is relatively large, two of the cooling modules can be used. If the temperature of the air inlet is not very high or the air volume is not large, only one cooling module can be turned on. At the same time, the present application no longer uses spray for cooling, and will not cause lumps in the flue gas cooling device to clog the filter bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the structure of the small-scale waste incineration flue gas cooling device provided for this application Figure 1 ;

[0017] Figure 2 Schematic diagram of the structure of the small-scale waste incineration flue gas cooling device provided for this application Figure 2 .

[0018] Markings in the figure: 1-main body, 2-air inlet, 3-air outlet, 4-water inlet pipe, 5-return pipe, 6-first cooling module, 61-first cooling unit, 62-second cooling unit, 63-first short-circuit water valve, 64-second short-circuit water valve, 7-second cooling module, 71-third cooling unit, 72-fourth cooling unit, 73-fifth cooling unit, 74-third short-circuit water valve, 75-fourth short-circuit water valve, 76-fifth short-circuit water valve, 8-control valve, 9-vent valve, 10-ash hopper, 11-ash unloading valve. DETAILED DESCRIPTION

[0019] The present invention will be described in detail below with reference to the accompanying drawings.

[0020] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0021] In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the internal communication between two components. It can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0022] like Figure 1 As shown, the present application discloses a small-scale waste incineration flue gas cooling device, comprising a main body 1, with an air inlet 2 and an air outlet 3 provided at both ends of the main body 1, the air inlet 2 being connected to the outlet of the incinerator, and the air outlet 3 being connected to the filter bag. At least two cooling modules are installed in the main body 1, and the cooling modules are connected in parallel. The water inlet of the cooling module is connected to the water inlet pipe 4, and the water outlet of the cooling module is connected to the return pipe 5. The inlet water flows from the cooling module near the air outlet 3 to the cooling module near the air inlet 2. An inlet valve is installed on the water inlet pipe 4, and a return valve is installed on the return pipe 5.

[0023] The cooling module in this embodiment includes a first cooling module 6 and a second cooling module 7. The first cooling module 6 is located near the air inlet 2, and the second cooling module 7 is located near the air outlet 3. The first cooling module 6 and the second cooling module 7 can be connected in series or in parallel. In this embodiment, in order to achieve a faster cooling effect, the first cooling module 6 and the second cooling module 7 are connected in parallel, that is, the water inlets of the first cooling module 6 and the second cooling module 7 are both connected to the water inlet pipe 4, and the water outlets of the first cooling module 6 and the second cooling module 7 are both connected to the return pipe 5.

[0024] The first cooling module 6 includes a primary cooling unit 61 and a secondary cooling unit 62, which are connected in series. A first short-circuit water valve 63 is connected between the water outlet and the water inlet of the primary cooling unit 61, and a second short-circuit water valve 64 is connected between the water outlet and the water inlet of the secondary cooling unit 62. A control valve 8 is provided between the water inlet and the water outlet of the primary cooling unit 61 and the secondary cooling unit 62, and the two control valves 8 in the first cooling module 6 are connected in series.

[0025] The second cooling module 7 includes a three-stage cooling unit 71, a four-stage cooling unit 72 and a five-stage cooling unit 73. A third short-circuit water valve 74 is connected between the water outlet and the water inlet of the three-stage cooling unit 71, a fourth short-circuit water valve 75 is connected between the water outlet and the water inlet of the four-stage cooling unit 72, and a fifth short-circuit water valve 76 is connected between the water outlet and the water inlet of the five-stage cooling unit 73. Control valves 8 are provided at the water inlet and water outlet of the three-stage cooling unit 71, the four-stage cooling unit 72 and the five-stage cooling unit 73. The three control valves 8 in the second cooling module 7 are connected in series.

[0026] Thermometers are installed at both the air inlet 2 and the air outlet 3 of the main body 1. The temperature at the air inlet 2 determines whether the first cooling module 6 is activated, while the temperature at the air outlet 3 determines whether the second cooling module 7 is activated. The first cooling module 6 and the second cooling module 7 are connected in parallel and can be used independently. A short-circuit water valve is also installed between the water inlet and outlet of each cooling unit. This allows for the system to operate even if a cooling unit fails by simply closing the corresponding control valves 8 on either side and opening the corresponding short-circuit water valve.

[0027] The first-stage cooling unit 61, the second-stage cooling unit 62, the third-stage cooling unit 71, the fourth-stage cooling unit 72, and the fifth-stage cooling unit 73 are all equipped with a vent valve 9. The water pipes in each cooling unit in the present application are all S-shaped and can be arranged along the direction of the airflow in the body or perpendicular to the direction of the airflow. It is best to arrange them perpendicularly, so as to increase the contact area between the cooling unit and the airflow and the cooling effect. The accompanying drawings of this embodiment are only simple diagrams. The specific layout of each cooling unit can be designed as needed. Each cooling unit is installed on a frame, and the frame is installed on the body by bolts, so that the entire cooling unit can be easily installed and disassembled.

[0028] The first-stage cooling unit 61 , the second-stage cooling unit 62 , the third-stage cooling unit 71 , the fourth-stage cooling unit 72 and the fifth-stage cooling unit 73 are all equipped with a vent valve 9 .

[0029] A dust cleaning door is provided on the main body 1 corresponding to each cooling unit. The dust cleaning door is hinged to the main body 1 and can be opened. After a period of use, the delayed cooling device can be paused, the dust cleaning door can be opened, and the dust on each cooling unit can be processed to improve the cooling effect.

[0030] At least one ash hopper 10 is provided at the bottom of the main body 1. In this embodiment, three ash hoppers 10 are provided on the main body 1. In order to better collect dust, the cross-sectional area of each ash hopper 10 should be designed to be trapezoidal, and an ash discharge valve 11 is also installed at the bottom of each ash hopper 10.

[0031] Working process: When the cooling units in the flue gas cooling device are in normal use, the first short-circuit water valve 63, the second short-circuit water valve 64, the third short-circuit water valve 74, the fourth short-circuit water valve 75, and the fifth short-circuit water valve 76 are all closed, and each control valve 8 is opened, so that cooling water flows in from the water inlet pipe 4, flows into the five-stage cooling unit 73 and the second-stage cooling unit 62 respectively, and then flows out from the third-stage cooling unit 71 and the first-stage cooling unit 61 respectively and returns to the return pipe 5.

[0032] If too much cooling is not required, then one or several cooling units can be closed, or if a cooling unit is damaged, the damaged cooling unit can be closed. For example, if the first-stage cooling unit 61 and the fourth-stage cooling unit 72 are not used, the control valves 8 on both sides of the first-stage cooling unit 61 and the fourth-stage cooling unit 72 are closed, the first short-circuit water valve 63 and the fourth short-circuit water valve 75 are opened, and the vent valves 9 corresponding to the first-stage cooling unit 61 and the fourth-stage cooling unit 72 are opened at the same time. After the water flows through the fifth-stage cooling unit 73, it flows directly from the fourth short-circuit water valve 75 into the third-stage cooling unit 71. Similarly, after the cooling water passes through the second-stage cooling unit 62, it flows directly through the first short-circuit water valve 63 into the return pipe 5. The pressure in the first-stage cooling unit 61 and the fourth-stage cooling unit 72 is released through the vent valve 9 to prevent the first-stage cooling unit 61 and the fourth-stage cooling unit 72 from bursting.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A small-scale waste incineration flue gas cooling device, characterized in that: The invention comprises a main body (1), wherein both ends of the main body (1) are provided with an air inlet (2) and an air outlet (3), the air inlet (2) is connected to the outlet of the incinerator, and the air outlet (3) is connected to the filter bag. At least two cooling modules are installed in the main body (1), and the cooling modules are connected in parallel. The water inlet of each cooling module is connected to the water inlet pipe (4), and the water outlet of the cooling module is connected to the return pipe (5), and the water inlet direction flows from the cooling module near the air outlet (3) to the cooling module at the air inlet (2); the cooling module comprises a first cooling module (6) and a second cooling module (7), the first cooling module (6) and the second cooling module (7) are connected in parallel, and the first cooling module (6) and the second cooling module (7) are connected in parallel. The first cooling module (6) is close to one end of the air inlet (2), and the second cooling module (7) is close to one end of the air outlet (3); the first cooling module (6) includes a first cooling unit (61) and a second cooling unit (62), the first cooling unit (61) and the second cooling unit (62) are connected in series, a first short-circuit water valve (63) is connected between the water outlet and the water inlet of the first cooling unit (61), and a second short-circuit water valve (64) is connected between the water outlet and the water inlet of the second cooling unit (62), and a control valve (8) is provided between the water inlet and the water outlet of the first cooling unit (61) and the second cooling unit (62), and the two control valves (8) in the first cooling module (6) are connected in series.

2. The small-sized waste incineration flue gas cooling device according to claim 1 is characterized in that: The second cooling module (7) comprises a three-stage cooling unit (71), a four-stage cooling unit (72) and a five-stage cooling unit (73); a third short-circuit water valve (74) is connected between the water outlet and the water inlet of the three-stage cooling unit (71); a fourth short-circuit water valve (75) is connected between the water outlet and the water inlet of the four-stage cooling unit (72); a fifth short-circuit water valve (76) is connected between the water outlet and the water inlet of the five-stage cooling unit (73); a control valve (8) is provided at the water inlet and the water outlet of the three-stage cooling unit (71), the four-stage cooling unit (72) and the five-stage cooling unit (73); and the three control valves (8) in the second cooling module (7) are connected in series.

3. The small-sized waste incineration flue gas cooling device according to claim 2 is characterized in that: The first-stage cooling unit (61), the second-stage cooling unit (62), the third-stage cooling unit (71), the fourth-stage cooling unit (72), and the fifth-stage cooling unit (73) are all equipped with a vent valve (9).

4. The small-sized waste incineration flue gas cooling device according to claim 1, characterized in that: A dust cleaning door is provided on the main body (1) corresponding to each cooling unit.

5. The small-sized waste incineration flue gas cooling device according to claim 1 is characterized in that: At least one ash hopper (10) is provided at the bottom of the body (1), and an ash discharge valve (11) is installed at the bottom of the ash hopper (10).

6. The small-sized waste incineration flue gas cooling device according to claim 5, characterized in that: The cross section of the ash hopper bin (10) is trapezoidal.

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