Incinerator tail gas deacidification system

Abstract

The utility model relates to the technical field of incinerator tail gas treatment, and particularly discloses an incinerator tail gas deacidification system which comprises an incinerator body, a primary combustion chamber and a secondary combustion chamber are arranged in the incinerator body, and a liquid spray gun is arranged on the end face of the secondary combustion chamber. A first pushing device for filling alkaline powder is arranged at the feeding end of the primary combustion chamber, and a second pushing device for filling alkaline powder is further arranged on the portion, at the rear end of the liquid spray gun, of the secondary combustion chamber. In the use process, the spraying amount of calcium hydroxide can be effectively controlled, and the reaction time of the calcium hydroxide can be prolonged, so that the use quality requirement is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of incinerator tail gas treatment, in particular to an incinerator tail gas deacidification system. Background Art

[0002] In the process of waste incineration, inorganic acid tail gases such as sulfuric acid, sulfurous acid, hydrofluoric acid and hydrochloric acid will be decomposed. On the one hand, this kind of tail gas will corrode equipment, and on the other hand, it will cause the tail gas to exceed the standard. The current technology is to spray slurry calcium hydroxide to neutralize the acid during the rapid cooling of incineration, and then use the bag dust removal structure and then the alkali solution spray structure to achieve the standard emission after neutralizing the sulfur and sulfur in the tail gas.

[0003] The disadvantages of the above-mentioned connection structure are that no deacidification device is set from the combustion point to the alkali solution spraying and rapid cooling point, and the slurry calcium hydroxide is easily sprayed in excess and the reaction time is short, so it falls into the fly ash produced by incineration before it has time to react, thereby increasing the landfill volume of fly ash, the landfill cost and the cost of calcium hydroxide raw materials, and reducing the quality requirements for the use of this process. Utility Model Content

[0004] The technical problem to be solved by the utility model is that the spraying amount of calcium hydroxide cannot be effectively controlled in the deacidification treatment of tail gas, and the reaction time of calcium hydroxide is relatively short, resulting in a reduction in the quality requirements for use.

[0005] In order to solve the above problems, the technical solution of the utility model is: an incinerator tail gas deacidification system, including an incinerator body, the incinerator body includes a primary combustion chamber and a secondary combustion chamber, a liquid spray gun is provided on the end face of the secondary combustion chamber, a pushing device 1 for filling alkaline powder is provided at the feed end of the primary combustion chamber, and a pushing device 2 for filling alkaline powder is also provided at the upper end of the secondary combustion chamber at the rear end of the liquid spray gun.

[0006] Furthermore, the pushing device 1 and the pushing device 2 include a silo and a pushing cylinder communicating with the silo, and a rotatable spiral pushing shaft is provided in the pushing cylinder.

[0007] Furthermore, a combustion slag discharge port is also provided at the bottom of the incinerator body.

[0008] Furthermore, a waste heat recovery device is provided on the top surface of the secondary combustion furnace, and a tail gas purification device is also provided on the end surface of the waste heat recovery device.

[0009] The advantages of the utility model compared with the existing technology are:

[0010] By cooperating with the pushing device 1 for adding alkaline powder at the feeding end of the primary combustion chamber and the pushing device 2 for adding alkaline powder on the secondary combustion chamber, the spraying amount of calcium hydroxide can be effectively controlled and the reaction time of calcium hydroxide can be increased, thereby eliminating the original incinerator structure of adding calcium hydroxide to water for slurrying and then spraying for rapid cooling, saving a large amount of slurrying water resources, preventing the calcium hydroxide from having a short reaction time and wasting calcium hydroxide that does not have time to react, saving resources, and saving the investment cost of the calcium hydroxide slurrying spraying device. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a system connection diagram of the utility model.

[0012] As shown in the figure: 1. Primary combustion chamber; 2. Secondary combustion chamber; 3. Pushing device 1; 4. Pushing device 2; 5. Material silo; 6. Pushing cylinder; 7. Incineration slag discharge outlet; 8. Waste heat recovery device; 9. Exhaust gas purification device. DETAILED DESCRIPTION

[0013] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0014] like Figure 1 As shown, an incinerator tail gas deacidification system includes an incinerator body, the incinerator body includes a primary combustion chamber 1 and a secondary combustion chamber 2, a liquid spray gun 10 is provided on the end surface of the secondary combustion chamber 2, and a combustion slag discharge port 7 is also provided at the bottom of the incinerator body. The above structure belongs to the prior art;

[0015] A pushing device 3 for filling alkaline powder is provided at the feeding end of the primary combustion chamber 1, and a pushing device 4 for filling alkaline powder is provided at the upper end of the secondary combustion chamber 2 at the rear end of the liquid spray gun 10.

[0016] The pushing device 1 3 and the pushing device 2 4 include a silo 5 and a pushing cylinder 6 communicating with the silo 5 . A rotatable spiral pushing shaft is arranged in the pushing cylinder 6 , and the end of the spiral pushing shaft is connected to an external power motor.

[0017] The alkaline powder is one of calcium hydroxide, baking soda or calcium carbonate, and the alkaline powder is preferably calcium hydroxide.

[0018] A waste heat recovery device 8 is provided on the top surface of the secondary combustion furnace 2 , and a tail gas purification device 9 is also provided on the end surface of the waste heat recovery device 8 .

[0019] In specific use, the calcium hydroxide pushed into the incinerator can react with the acidic exhaust gas generated during combustion and drift backward from the generation end along with the exhaust gas. This allows the incinerator to say goodbye to the cumbersome structure of calcium hydroxide that requires slurrying and spraying for rapid cooling. At the same time, it can save a lot of water resources. More importantly, the reaction time and stroke of the calcium hydroxide pushed in and the exhaust gas are increased compared to the reaction time during rapid cooling, which can achieve sufficient reaction and reduce the phenomenon of excessive alkaline powder falling into fly ash, thereby improving the quality requirements for the use of this device.

[0020] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. An incinerator tail gas deacidification system, comprising an incinerator body, wherein the incinerator body comprises a primary combustion chamber (1) and a secondary combustion chamber (2), wherein a liquid spray gun (10) is provided on the end surface of the secondary combustion chamber (2), and wherein: A pushing device (3) for filling alkaline powder is provided at the feeding end of the primary combustion chamber (1), and a pushing device (4) for filling alkaline powder is provided at the upper end of the secondary combustion chamber (2) at the rear end of the liquid spray gun (10).

2. The incinerator tail gas deacidification system according to claim 1, characterized in that: The pushing device 1 (3) and the pushing device 2 (4) comprise a material bin (5) and a pushing cylinder (6) interpenetrating with the material bin (5), wherein a rotatable spiral pushing shaft is arranged in the pushing cylinder (6).

3. The incinerator tail gas deacidification system according to claim 1, characterized in that: The bottom of the incinerator body is also provided with an incineration slag discharge port (7).

4. The incinerator tail gas deacidification system according to claim 1, characterized in that: A waste heat recovery device (8) is provided on the top surface of the secondary combustion chamber (2), and an exhaust gas purification device (9) is also provided on the end surface of the waste heat recovery device (8).

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