Deacidification system for low-temperature pyrolysis waste

Abstract

The utility model relates to the technical field of resource recovery treatment, and particularly discloses a deacidification system for low-temperature cracking of hazardous wastes, which comprises a low-temperature cracking device and a heating chamber in the low-temperature cracking device, and further comprises a condensation spraying chamber and a combustion chamber which are mutually connected with the low-temperature cracking device, the device is characterized in that an adjusting device for pushing alkaline powder is arranged at the position, at an outlet of the low-temperature cracking device, in the condensation spraying chamber, a first pushing device for filling the alkaline powder is arranged at the inlet end of the heating chamber, and a second pushing device for filling the alkaline powder is arranged at the rear end of the organic material spraying head of the combustion chamber. According to the utility model, acidic materials generated by re-combustion after cooling can be subjected to effective deacidification treatment, so that the use efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of resource recovery, in particular to a deacidification system for low-temperature cracking waste. Background Art

[0002] One of the current methods of waste treatment is low-temperature pyrolysis. During low-temperature pyrolysis, part of the organic sulfur or chlorine is volatilized and then cracked into inorganic acid, while part of the sodium sulfate or sodium chloride is also volatilized. During the low-temperature pyrolysis process, the organic sulfur and chlorine in the waste are decomposed into inorganic acid, which will corrode equipment and pollute the environment, so deacidification is necessary.

[0003] The current common practice is that sodium sulfate, sodium chloride and inorganic acids cracked from organic sulfur or chlorine are sprayed with a solution containing sodium hydroxide at the outlet of low-temperature cracking and cooled to below 100°C. At this time, the following substances are mainly produced: organic sulfur and organic chlorine, carbon slag, non-condensable gas, oil and water. The condensed organic sulfur and organic chlorine enter the combustion chamber and burn, decomposing inorganic acids containing sulfur or chlorine during combustion. Since inorganic acids are highly corrosive, this will greatly shorten their service life.

[0004] The above connection method only takes deacidification measures during the condensation process of the waste after low-temperature cracking. Since new acidic substances will be produced during combustion after cooling, the deacidification is not thorough enough. Not only can it not effectively prevent equipment corrosion, but some of the acidic substances will also leak into the surrounding environment and cause environmental pollution. Utility Model Content

[0005] The technical problem to be solved by the utility model is that the acidic substances generated by re-combustion after cooling cannot be effectively deacidified, resulting in reduced use efficiency.

[0006] In order to solve the above problems, the technical solution of the utility model is: a deacidification system for low-temperature pyrolysis waste, including a low-temperature pyrolysis device and a heating chamber in the low-temperature pyrolysis device, and also including a condensation spray chamber and a combustion chamber connected to each other, wherein an adjusting device for pushing alkaline powder is provided at the outlet of the low-temperature pyrolysis device in the condensation spray chamber, a pushing device 1 for filling alkaline powder is provided at the inlet end of the heating chamber, and a pushing device 2 for filling alkaline powder is provided at the front end of the spray head of the organic material in the combustion chamber.

[0007] Furthermore, the pushing device 1 and the pushing device 2 respectively include a pushing cylinder, a feeding cylinder and a spiral pushing shaft. The top surface of the pushing cylinder is connected to the feeding cylinder which is intersected therewith, and a spiral pushing shaft is rotatably penetrated inside the pushing cylinder. The outer end of the spiral pushing shaft is connected to the output shaft of the motor.

[0008] Furthermore, a control device for discharging the aqueous solution of organic matter is also provided in the spray chamber.

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

[0010] Through the joint action of the regulating device for pushing the alkaline powder in the condensation spray chamber, the pushing device 1 for filling the alkaline powder at the inlet end of the heating chamber, and the pushing device 2 for filling the alkaline powder at the rear end of the organic material spray head in the combustion chamber, deacidification can be carried out in three stages during use, and the acidic substances produced by the re-combustion after cooling can be effectively deacidified, so as to prevent the acidic materials from corroding the equipment at all times, and the investment and operation costs are low. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0012] Figure 2 It is a structural diagram of a pushing device 1 in the utility model.

[0013] As shown in the figure: 1. Low-temperature cracking device; 2. Heating chamber; 3. Condensation spray chamber; 4. Combustion chamber; 5. Adjustment device; 6. Pushing device 1; 7. Pushing device 2; 8. Control device; 9. Pushing cylinder; 10. Feeding cylinder; 11. Spiral pushing shaft; 12. Motor. DETAILED DESCRIPTION

[0014] 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.

[0015] like Figure 1 As shown, a deacidification system for low-temperature pyrolysis waste includes a low-temperature pyrolysis device 1 and a heating chamber 2 in the low-temperature pyrolysis device 1, and also includes a condensation spray chamber 3 and a combustion chamber 4 connected to each other. The above structure belongs to the prior art;

[0016] An adjusting device 5 for pushing alkaline powder is provided at the outlet of the low-temperature cracking device 1 in the condensation spray chamber 3. Under the action of the adjusting device 5, the solution of the alkaline powder is sprayed, and neutralization can be performed while spraying and condensing water vapor into water. A pushing device 6 for filling alkaline powder is provided at the inlet end of the heating chamber 2, and a pushing device 7 for filling alkaline powder is provided at the front end of the organic material spray head of the combustion chamber 4. The alkaline powder is one of calcium hydroxide, baking soda or sodium hydroxide powder, preferably calcium hydroxide powder.

[0017] like Figure 2As shown, the pushing device 1 6 and the pushing device 2 7 respectively include a pushing cylinder 9, a feeding cylinder 10 and a spiral pushing shaft 11. The top surface of the pushing cylinder 9 is connected to the feeding cylinder 10 which is intersected therewith, and a spiral pushing shaft 11 is rotatably penetrated in the pushing cylinder 9. The outer end of the spiral pushing shaft 11 is connected to the output shaft of the motor 12. When the motor 12 is started, the spiral pushing shaft 11 is driven to rotate to push the alkaline powder in the feeding cylinder 10.

[0018] like Figure 1 As shown, a control device 8 for discharging the aqueous solution of organic matter is also provided in the spray chamber 3. Under the action of the control device 8, the aqueous solution of organic matter is sent to the wastewater treatment workshop.

[0019] In specific use, a calcium hydroxide pushing device 2 7 is installed at the front end of the spray head of the combustion chamber 4, so that the inorganic acids such as sulfur or chlorine decomposed by combustion are immediately neutralized and deacidified into calcium sulfate or calcium chloride salt. At this time, the 1100°C high-temperature exhaust gas is sent to the low-temperature cracking heating chamber 2 to heat the materials fed by the low-temperature cracking device. A calcium hydroxide powder pushing device 6 is installed at the inlet end of the low-temperature cracking heating chamber, so that the heating chamber can be heated and deacidified at the same time. When the outlet temperature of the low-temperature cracking device 1 is controlled at more than 500°C, the exhaust gas enters the quenching chamber and is quenched to below 200°C. The exhaust gas is dedusted by a bag and then sprayed with a sodium hydroxide solution for deacidification before it meets the emission standards.

[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. A deacidification system for low-temperature pyrolysis waste, comprising a low-temperature pyrolysis device (1) and a heating chamber (2) in the low-temperature pyrolysis device (1), and also comprising a condensation spray chamber (3) and a combustion chamber (4) connected to the low-temperature pyrolysis device (1), characterized in that: An adjusting device (5) for pushing alkaline powder is provided at the outlet connection of the low-temperature cracking device (1) in the condensation spray chamber (3), a pushing device (6) for filling alkaline powder is provided at the inlet end of the heating chamber (2), and a pushing device (7) for filling alkaline powder is provided at the front end of the spray head of the organic material in the combustion chamber (4).

2. A deacidification system for low-temperature pyrolysis waste according to claim 1, characterized in that: The pushing device 1 (6) and the pushing device 2 (7) respectively comprise a pushing cylinder (9), a feeding cylinder (10) and a spiral pushing shaft (11); the top surface of the pushing cylinder (9) is connected to the feeding cylinder (10) which is intersecting therewith, and a spiral pushing shaft (11) is rotatably inserted into the pushing cylinder (9); the outer end of the spiral pushing shaft (11) is connected to the output shaft of the motor (12).

3. A deacidification system for low-temperature pyrolysis waste according to claim 1, characterized in that: The spray chamber (3) is also provided with a control device (8) for discharging the aqueous solution of organic matter.

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