Smoke discharging and reducing device for boiler

Abstract

The utility model belongs to the technical field of gas-fired boilers, and relates to a boiler smoke discharging and reducing device which comprises a coal-fired heating furnace, a coal gas inlet and a coal gas outlet are formed in the two sides of the upper portion of the coal-fired heating furnace, a smoke inlet and a smoke outlet are formed in the two sides of the lower portion of the coal-fired heating furnace, and a heat exchange tube bundle is arranged in the coal-fired heating furnace. A circulating water pipeline is arranged above the coal-fired heating furnace, a spray header is arranged at the tail end of the circulating water pipeline, and a discharge pipe is arranged at the bottom of the coal-fired heating furnace and extends into the water-sealed bottle. The device is simple in structure, avoids furnace shutdown treatment, reduces waste gas emission, improves energy utilization efficiency, reduces energy heat waste, and has wide applicability.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas boilers, and in particular relates to a boiler smoke exhaust and smoke reduction device. Background Art

[0002] Gas-fired power generation boiler is a kind of equipment that uses gas as fuel, generates heat energy through combustion, and then converts it into electrical energy. It is often used in industrial production or heating. Gas-fired power generation boiler has the characteristics of high efficiency, energy saving, environmental protection and low cost, and is one of the more common power generation equipment.

[0003] Due to the incomplete reaction of ammonia in the denitration process of gas-fired power generation boilers, it is inevitable that NH3 will escape during the SCR flue gas denitration process. SO3 will react with NH3 to produce ammonium bisulfate. Ammonium bisulfate is an ammonium salt and a colorless crystal at room temperature. Ammonium bisulfate has the characteristics of hygroscopicity, corrosiveness, and viscosity. It is easy to corrode and adhere to the surface of the air preheater and coal-fired tube bundle, resulting in poor heat exchange effect of the tube bundle and increased exhaust gas temperature.

[0004] The ammonium bisulfate caked at the coal adding position due to the use of denitrification can easily cause corrosion of the boiler coal adding heat exchanger tube bundle, seriously affecting the safe operation of the boiler. Utility Model Content

[0005] The utility model aims to provide a boiler smoke exhaust reduction device, which has the function of removing ammonium bisulfate and reducing boiler smoke exhaust, and solves the problem that the denitrification technology produces ammonium bisulfate caking, which easily causes corrosion of the boiler coal heat exchanger tube bundle.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: the utility model provides a boiler smoke exhaust and smoke reduction device, including a coal-fired heating furnace, wherein gas inlets and gas outlets are arranged on both sides of the upper portion of the coal-fired heating furnace, smoke inlets and smoke outlets are arranged on both sides of the lower portion of the coal-fired heating furnace, a heat exchange tube bundle is arranged inside the coal-fired heating furnace, a circulating water pipeline is arranged above the coal-fired heating furnace, a sprinkler head is arranged at the end of the circulating water pipeline, a discharge pipe is arranged at the bottom of the coal-fired heating furnace, and the discharge pipe extends into a water seal bottle.

[0007] Preferably, the circulating water pipeline extends into the coal-fired heating furnace, and the sprinkler head is arranged in the coal-fired heating furnace.

[0008] Preferably, a water inlet valve is provided on the circulating water pipeline.

[0009] Preferably, a discharge valve is provided on the discharge pipe.

[0010] Preferably, an outlet pipe is provided on one side of the top of the water seal bottle.

[0011] Compared with the prior art, the advantages and positive effects of the utility model are:

[0012] 1. The utility model has a simple structure, avoids shutdown treatment, reduces exhaust gas emissions, improves energy utilization efficiency, reduces energy and heat waste, and has wide applicability;

[0013] 2. The utility model has the function of removing ammonium bisulfate and reducing boiler smoke exhaust, which solves the problem of ammonium bisulfate caking caused by denitrification in the prior art, which easily causes corrosion of the boiler coal heat exchanger tube bundle. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor.

[0015] Figure 1 It is a structural schematic diagram of a boiler smoke exhaust and smoke reduction device;

[0016] In the above figure, 1. coal-fired heating furnace, 2. gas inlet, 3. gas outlet, 4. flue gas inlet, 5. flue gas outlet, 6. heat exchange tube bundle, 7. circulating water pipeline, 8. sprinkler head, 9. water inlet valve, 10. discharge pipe, 11. water seal bottle, 12. discharge valve, 13. lead-out pipe. DETAILED DESCRIPTION

[0017] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0018] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0019] Embodiment 1, as Figure 1 As shown, a boiler smoke exhaust and smoke reduction device includes a coal-fired heating furnace 1, which is responsible for burning gas to generate heat energy, and then converting the heat energy into electrical energy for power generation. A gas inlet 2 and a gas outlet 3 are arranged on both sides of the upper part of the coal-fired heating furnace 1. The gas inlet 2 introduces the gas into the coal-fired heating furnace 1 to provide a continuous fuel for combustion, and the gas outlet 3 discharges the burned gas out of the coal-fired heating furnace 1.

[0020] A smoke inlet 4 and a smoke outlet 5 are arranged on both sides of the lower part of the coal-fired heating furnace 1. The smoke inlet 4 introduces external smoke, and the smoke treated by the smoke exhaust and smoke reduction device is discharged through the smoke outlet 5 to reduce pollution to the environment.

[0021] A heat exchange tube bundle 6 is provided inside the coal-fired heating furnace 1. The heat exchange tube bundle 6 receives heat inside the coal-fired heating furnace 1 for heat exchange and transfers the heat to the internal medium. A circulating water pipeline 7 is provided above the coal-fired heating furnace 1. The circulating water pipeline 7 is connected to an external device for drawing out circulating water for use. A spray head 8 is provided at the end of the circulating water pipeline 7. The spray head 8 is used to spray cooling water into the coal-fired heating furnace 1. Since ammonium bisulfate is easily soluble in water, the ammonium bisulfate can be dissolved to achieve the function of cleaning the heat exchange tube bundle 6, thereby improving the heat exchange efficiency.

[0022] A discharge pipe 10 is provided at the bottom of the coal-fired heating furnace 1. Circulating water is sprayed in and discharged through the discharge pipe 10. The discharge pipe 10 extends into a water seal bottle 11. The water seal bottle 11 prevents exhaust gas from flowing back and ensures safe operation.

[0023] The following is a detailed description of the design of the above key components:

[0024] The circulating water pipe 7 extends into the coal-fired heating furnace 1, and the spray head 8 is arranged in the coal-fired heating furnace 1. This design can ensure that the cooling water is directly sprayed on the heat exchange tube bundle 6, which can not only effectively reduce the flue gas temperature, but also play a role in cleaning the heat exchange tube bundle 6.

[0025] The circulating water pipeline 7 is provided with a water inlet valve 9, which can conveniently control the amount of circulating water in the circulating water pipeline 7 and adjust the flow rate according to actual conditions.

[0026] The discharge pipe 10 is provided with a discharge valve 12, and the discharge valve 12 can conveniently control the opening and closing of the discharge pipe 10, and control and adjust the speed and amount of discharge.

[0027] A lead-out pipe 13 is provided on one side of the top of the water seal bottle 11. The lead-out pipe 13 can effectively lead the circulating water after flushing from the water seal bottle 11 to the outside to avoid overflow caused by excessive drainage.

[0028] A boiler smoke exhaust and smoke reduction device has a simple structure, avoids shutdown processing, reduces exhaust gas emissions, improves energy utilization efficiency, reduces energy and heat waste, and has wide applicability;

[0029] It has the function of removing ammonium bisulfate and reducing boiler smoke exhaust, and solves the problem of ammonium bisulfate caking caused by denitrification in the prior art, which easily causes corrosion of the heat exchange tube bundle 6 in the boiler coal-fired heating furnace 1.

[0030] The contents not described in detail in this specification belong to the prior art known to professionals in this field.

[0031] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A boiler smoke exhaust reduction device, characterized in that: It comprises a coal-fired heating furnace, wherein gas inlet and gas outlet are arranged on both sides of the upper part of the coal-fired heating furnace, flue gas inlet and flue gas outlet are arranged on both sides of the lower part of the coal-fired heating furnace, a heat exchange tube bundle is arranged inside the coal-fired heating furnace, a circulating water pipeline is arranged above the coal-fired heating furnace, a sprinkler head is arranged at the end of the circulating water pipeline, a discharge pipe is arranged at the bottom of the coal-fired heating furnace, and the discharge pipe extends into a water seal bottle.

2. A boiler smoke exhaust and smoke reduction device according to claim 1, characterized in that: The circulating water pipeline extends into the coal-fired heating furnace, and the spray head is arranged in the coal-fired heating furnace.

3. A boiler smoke exhaust and smoke reduction device according to claim 2, characterized in that: The circulating water pipeline is provided with a water inlet valve.

4. A boiler smoke exhaust and smoke reduction device according to claim 1, characterized in that: The discharge pipe is provided with a discharge valve.

5. The boiler smoke exhaust and smoke reduction device according to claim 1, characterized in that: A lead-out pipe is arranged on one side of the top of the water seal bottle.

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