Waste gas waste heat utilization device and chain grate furnace waste gas emission system

Abstract

The utility model provides a waste gas waste heat utilization device which comprises a waste gas pipe, a waste heat recovery device and a waste heat recovery device. The water tank is fixedly arranged, the upper end of the waste gas pipe extends into the water tank, the water tank is further fixedly connected with an exhaust pipe which is communicated with the water tank and located above the waste gas pipe, and the water tank is further fixedly connected with a water inlet pipe and a water outlet pipe which are communicated with the water tank; the flow guide cover is fixedly arranged in the water tank, and an opening of the flow guide cover is arranged above the exhaust end in a covering manner; the water surface is located between the lower end face of the flow guide cover and the upper end face of the waste gas pipe. The utility model further provides a chain grate furnace waste gas emission system comprising the waste gas waste heat utilization device. According to the utility model, the problem that the surrounding environment is possibly polluted due to long-time accumulation after waste gas emission in the prior art is solved to a certain extent.

Description

Technical Field

[0001] The utility model relates to the technical field of comprehensive utilization equipment for chain furnace waste gas, in particular to a waste gas waste heat utilization device and a chain furnace waste gas emission system. Background Art

[0002] Chain grate furnaces can be used to sinter solid waste. During operation, air enters the combustion chamber from the lower plenum of the grate, then passes through the material layer on the grate, allowing it to burn smoothly. The exhaust gas contains a large amount of particulate impurities and requires purification before discharge to avoid environmental pollution. Exhaust gas purification methods currently available can remove most particulate impurities, but the treated exhaust gas typically still has a relatively high temperature (80-100°C), and direct discharge results in heat loss. This is typically achieved by placing a jacket around the exhaust pipe (the pipe through which the treated exhaust gas is discharged) and passing water through the jacket. The exhaust gas heats the water to a certain extent during passage, thus utilizing this heat. In actual operation, although the exhaust gas has been purified, it still contains a small amount of particulate impurities. Direct discharge will not cause pollution to the surrounding environment in the short term, but may still cause pollution over time. Utility Model Content

[0003] In view of the deficiencies in the prior art, the present invention provides an exhaust gas waste heat utilization device, which solves the problem in the prior art that exhaust gas may accumulate for a long time after being discharged and may cause pollution to the surrounding environment.

[0004] According to an embodiment of the present utility model, a waste heat utilization device includes: an exhaust pipe, which is vertically arranged and the upper end of the exhaust pipe is an exhaust end; a water tank, which is fixedly arranged and the upper end of the exhaust pipe extends into the water tank, and the water tank is also fixedly connected to an exhaust pipe that is connected to the water tank and is located above the exhaust pipe, and the water tank is also fixedly connected to a water inlet pipe and a water outlet pipe that are connected to the water tank; a fairing, which is fixedly arranged in the water tank and the opening is arranged above the exhaust end toward the hood; the water tank is also filled with water, and the water surface is located between the lower end surface of the fairing and the upper end surface of the exhaust pipe.

[0005] In the above embodiment, the exhaust gas from the exhaust pipe directly enters the water in the water tank after passing through the deflector cover, and can directly exchange heat with the water and heat the water. At the same time, a small amount of particulate impurities contained in the exhaust gas will also be integrated into the water. Then the exhaust gas is separated from the water and discharged outward through the exhaust pipe above. While utilizing the waste heat, a small amount of particulate impurities is also intercepted, further reducing the amount of particulate impurities contained in the exhaust gas discharged. Therefore, to a certain extent, it solves the problem in the prior art that the long-term accumulation of exhaust gas after discharge may cause pollution to the surrounding environment.

[0006] Furthermore, a plurality of through holes are provided on the side wall of the lower end of the fairing, and the water surface is located above all the through holes.

[0007] Furthermore, the water inlet pipe is located at the upper end of the water tank with the water surface located below it, and the water outlet pipe is located at the bottom of the water tank.

[0008] Furthermore, a one-way valve is provided on the water inlet pipe, and a valve is provided on the water outlet pipe.

[0009] Furthermore, the outer top surface of the deflector is fixedly connected to the inner top surface of the water tank via a connecting rod.

[0010] Furthermore, the inner bottom surface of the water tank is an inclined surface, and the water outlet pipe is arranged at the lowest point of the inner bottom surface.

[0011] Furthermore, the exhaust pipe, the air deflector and the exhaust pipe are all located in the middle of the water tank and have the same axis.

[0012] According to an embodiment, a chain furnace exhaust gas emission system including the above-mentioned exhaust gas waste heat utilization device is also provided.

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

[0014] By directly extending the exhaust pipe into the water tank, the exhaust gas is guided into the water with the assistance of the deflector cover so as to directly contact the water. While utilizing the waste heat, a small amount of particulate impurities is also intercepted, further reducing the amount of particulate impurities contained in the exhaust gas discharged. Therefore, to a certain extent, it solves the problem in the prior art that the long-term accumulation of exhaust gas after discharge may cause pollution to the surrounding environment. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0016] Figure 2 for Figure 1 A magnified schematic diagram of the local structure at center A;

[0017] In the above drawings:

[0018] Exhaust pipe 1, water tank 2, exhaust pipe 3, water inlet pipe 4, water outlet pipe 5, deflector 6, one-way valve 7, valve 8, connecting rod 9, through hole 10. DETAILED DESCRIPTION

[0019] The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0020] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0021] In an exemplary embodiment, Figure 1 As shown, this embodiment provides a chain furnace exhaust gas discharge system, which is provided with an exhaust gas pipe 1 for discharging the treated exhaust gas.

[0022] like Figure 1 As shown, in a further scheme, a waste heat utilization device is also provided, which includes: an exhaust pipe 1 of an exhaust system, the exhaust pipe 1 is vertically arranged and the upper end is an exhaust end; a water tank 2, the water tank 2 is fixedly arranged and the upper end of the exhaust pipe 1 extends into the water tank 2, the water tank 2 is also fixedly connected to an exhaust pipe 3 that is connected to it and located above the exhaust pipe 1, and the water tank 2 is also fixedly connected to a water inlet pipe 4 and a water outlet pipe 5 that are connected to it; a fairing hood 6, the fairing hood 6 is fixedly arranged in the water tank 2 and the opening is arranged above the exhaust end toward the hood; the water tank 2 is also filled with water, and the water level is located between the lower end surface of the fairing hood 6 and the upper end surface of the exhaust pipe 1.

[0023] In the above embodiment, the exhaust gas from the exhaust pipe 1 directly enters the water in the water tank 2 after passing through the deflector 6. Specifically, the exhaust gas flows from bottom to top, then enters the deflector 6 from the exhaust end, and then enters the water downward. After merging with the water, it can directly exchange heat with the water and heat the water. At the same time, a small amount of particulate impurities contained in the exhaust gas will also merge into the water, and then be discharged outward through the exhaust pipe 3 above after being separated from the water. While utilizing the waste heat, a small amount of particulate impurities is also intercepted, further reducing the amount of particulate impurities contained in the exhaust gas discharged. Therefore, to a certain extent, it solves the problem of exhaust gas being discharged in the prior art. Long-term accumulation may lead to pollution of the surrounding environment; during operation, a one-way valve 7 and a valve 8 (ordinary valve 8) are respectively provided on the water inlet pipe 4 and the water outlet pipe 5. By controlling the flow of the water outlet pipe 5 to be the same as the flow of the water inlet pipe 4, the water level in the water tank 2 is relatively stable. Although the water may contain some gas and a small amount of particulate impurities, the water can be used for purposes such as flushing water with low impurity content requirements. The gas and impurities in the water will not cause adverse effects on use. The reason for providing a one-way valve 7 on the water inlet pipe 4 is to avoid gas backflow, while the water outlet pipe 5 can use an ordinary valve 8.

[0024] like Figure 1 As shown, in a further exemplary scheme, the water inlet pipe 4 is located at the upper end of the water tank 2 and the water surface is located below it, the water outlet pipe 5 is located at the bottom of the water tank 2, the inner bottom surface of the water tank 2 is an inclined surface, and the water outlet pipe 5 is arranged at the lowest point of the inner bottom surface, so that when the water is discharged from the water outlet pipe 5, it can carry granular impurities to a greater extent, preventing excessive impurities from being deposited at the bottom of the water tank 2. Specifically, after a period of use, it can be cleaned, that is, all the water in the water tank 2 is released, and then flushed through the water inlet pipe 4, and then water is stored to resume normal operation.

[0025] like Figure 1 、 2 As shown in the more detailed exemplary embodiment, the outer top surface of the air deflector 6 is fixedly connected to the inner top surface of the water tank 2 by a connecting rod 9. The exhaust pipe 1, the air deflector 6 and the exhaust pipe 3 are all located in the middle of the water tank 2 and have the same axis. In this way, the exhaust gas enters the water from the middle position and then leaves the water tank 2 from the middle position. The provided connecting rod 9 enables the air deflector 6 to be separated from the exhaust pipe 3 above (the connecting rod 9 does not block the flow of exhaust gas), allowing the exhaust gas leaving the water to smoothly enter the exhaust pipe 3, smoothly achieve exhaust, and at the same time ensure that the air deflector 6 is stable in the water tank 2; more detailed Specifically, a plurality of through holes 10 are provided on the side wall of the lower end of the fairing 6, and the water surface is located above all the through holes 10. The through holes 10 are provided for exhaust gas and water to pass through. The exhaust gas has a large pressure when flowing in the exhaust pipe 1, and is forced into the water. Part of the exhaust gas can diffuse in the water through the through holes 10, and part of the exhaust gas continues to flow downward and then diffuses. This allows the gas to be more widely dispersed in the water, and the water is also in a flowing state. In this way, the contact efficiency between the exhaust gas and the water is relatively better, so that it can play a better role in heat exchange and interception of particulate impurities.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A waste gas waste heat utilization device, characterized in that: include: An exhaust pipe is vertically arranged with an upper end serving as an exhaust end; A water tank, wherein the water tank is fixedly arranged and the upper end of the exhaust pipe extends into the water tank, the water tank is also fixedly connected to an exhaust pipe that is in communication with the water tank and is located above the exhaust pipe, and the water tank is also fixedly connected to a water inlet pipe and a water outlet pipe that are in communication with the water tank; A deflector cover, the deflector cover is fixedly arranged in the water tank and has an opening facing the cover and is located above the exhaust end; The water tank is also filled with water, and the water surface is located between the lower end surface of the deflector cover and the upper end surface of the exhaust pipe.

2. The exhaust gas waste heat utilization device according to claim 1, characterized in that: A plurality of through holes are provided on the side wall of the lower end of the deflector, and the water surface is located above all the through holes.

3. The exhaust gas waste heat utilization device according to claim 1, characterized in that: The water inlet pipe is located at the upper end of the water tank and the water surface is located below it, and the water outlet pipe is located at the bottom of the water tank.

4. The exhaust gas waste heat utilization device according to claim 3, characterized in that: A one-way valve is provided on the water inlet pipe, and a valve is provided on the water outlet pipe.

5. The exhaust gas waste heat utilization device according to claim 1, characterized in that: The outer top surface of the deflector is fixedly connected to the inner top surface of the water tank through a connecting rod.

6. The exhaust gas waste heat utilization device according to claim 1, characterized in that: The inner bottom surface of the water tank is an inclined surface, and the water outlet pipe is arranged at the lowest point of the inner bottom surface.

7. The exhaust gas waste heat utilization device according to any one of claims 1 to 6, characterized in that: The exhaust pipe, the air deflector and the exhaust pipe are all located in the middle of the water tank and have the same axis.

8. A chain furnace exhaust gas emission system, characterized in that: It comprises the exhaust gas waste heat utilization device as described in any one of claims 1 to 7.

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