A vertical rotary high-temperature pyrolysis gasification furnace solid waste treatment system

Abstract

A vertical rotary high-temperature pyrolysis gasification furnace solid waste treatment system includes a feeding system, a pyrolysis gasification furnace system, a secondary combustion chamber, a heat exchanger system, a quench tower system, a dry deacidification tower system, and a bag filter dust collection system. The top of the feeding system extends to the top opening of the pyrolysis gasification furnace system. The flue gas outlet of the pyrolysis gasification furnace system is connected to the air inlet of the secondary combustion chamber. The top exhaust port of the secondary combustion chamber is connected to the air inlet of the heat exchanger system. The exhaust end of the heat exchanger system is connected to the top air inlet of the quench tower system. One side of the bottom of the quench tower system is connected to the bottom of the dry deacidification tower system. The top of the dry deacidification tower system is connected to the air inlet of the bag filter dust collection system. The suction end of the bag filter dust collection system is connected to the exhaust end of the induced draft fan. This invention features reliable sealing; the bottom water seal trough and water-cooled jacket feeder completely solve the sealing problem, preventing harmful gases from escaping. Variable frequency feeding, rotary grate slag breaking, and automatic slag discharge improve processing efficiency by more than 30%.

Description

Technical Field

[0001] This utility model relates to the field of pyrolysis gasification furnace technology, specifically a solid waste treatment system for a vertical rotary high-temperature pyrolysis gasification furnace. Background Technology

[0002] Existing solid waste pyrolysis gasification equipment generally suffers from the following defects: 1. Poor sealing performance: Harmful gases are easily leaked from the furnace inlet and slag outlet, causing environmental pollution; 2. Low level of automation: Feeding and slag removal rely on manual operation, which is inefficient and poses safety hazards; 3. Incomplete combustion: Uneven air distribution leads to incomplete pyrolysis of solid waste, resulting in a high loss on ignition rate of the pyrolysis gasification residue; 4. Dioxin control is difficult: the flue gas cooling process did not avoid the dioxin resynthesis temperature range (200-500℃); 5. Rapid equipment corrosion: Acidic substances (such as Cl and P) during the pyrolysis and gasification of waste liquid severely corrode the spray gun and furnace body, shortening the equipment's lifespan.

[0003] Therefore, there is an urgent need for a solid waste treatment system that is reliably sealed, highly automated, burns completely, is corrosion-resistant, and can effectively suppress the formation of dioxins. Utility Model Content

[0004] To address the aforementioned problems, the purpose of this utility model is to provide a solid waste treatment system for a vertical rotary high-temperature pyrolysis gasification furnace.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: a vertical rotary high-temperature pyrolysis gasification furnace solid waste treatment system, comprising a feeding system, a pyrolysis gasification furnace system, a secondary combustion chamber, a heat exchanger system, a quench tower system, a dry deacidification tower system, and a bag filter system. The top of the feeding system extends to the top opening of the pyrolysis gasification furnace system. The flue gas outlet of the pyrolysis gasification furnace system is connected to the air inlet of the secondary combustion chamber. The top exhaust port of the secondary combustion chamber is connected to the air inlet of the heat exchanger system. The exhaust end of the heat exchanger system is connected to the top air inlet of the quench tower system. One side of the bottom of the quench tower system is connected to the bottom of the dry deacidification tower system. The top of the dry deacidification tower system is connected to the air inlet of the bag filter system. The suction end of the bag filter system is connected to the exhaust end of the induced draft fan. The induced draft fan sequentially creates negative pressure in the bag filter system, the dry deacidification tower system, the quench tower system, the heat exchanger system duct, and the secondary combustion chamber.

[0006] Furthermore, the pyrolysis gasification furnace system includes a pyrolysis gasification furnace feed hopper with a roller feeding device located at the bottom of the feed hopper. The bottom of the roller feeding device is connected to a water seal sleeve, which is located at the top of the pyrolysis gasification furnace. The top edge of the grate is connected and sealed to the lower end of the pyrolysis gasification furnace through a water seal. The grate has a tower-type eccentric structure and is driven to rotate by a gear drive device. The bottom of the pyrolysis gasification furnace is connected to a rectangular bottom water seal groove, and the conical opening at the bottom of the grate extends downward into the bottom water seal groove.

[0007] Furthermore, the secondary combustion chamber includes a main body of the secondary combustion chamber and a flue gas passage set on one side of the main body of the secondary combustion chamber. A waste liquid spray gun is set on the other side of the main body of the secondary combustion chamber. Two rows of annular air inlets are set in the middle of the main body of the secondary combustion chamber. A flue gas outlet is set on the top of the main body of the secondary combustion chamber.

[0008] Furthermore, the waste liquid spray gun includes a spray gun body and a spray gun head disposed at the liquid outlet end of the spray gun body. A connecting flange is disposed around the spray gun body, and a waste liquid inlet and a compressed air inlet are respectively disposed at the outer end of the spray gun body.

[0009] Furthermore, the exhaust end of the induced draft fan is connected to one side of the bottom of the wet deacidification system.

[0010] Furthermore, the feeding system is a material elevator, and the bottom of the material elevator is equipped with a solid waste container.

[0011] Furthermore, the bottom water seal trough opening extends outward and is equipped with an inclined slag remover. The bottom of the slag remover is below the water surface of the bottom water seal trough, and the upper end of the slag remover extends obliquely outward and upward.

[0012] Furthermore, the liquid waste is filtered through a waste liquid pool and then sprayed into the secondary combustion chamber by a waste liquid spray gun.

[0013] Furthermore, the top of the quench tower system, dry deacidification tower system, and bag filter dust collection system is equipped with an integrated maintenance platform with a fence.

[0014] With the above settings, this utility model has the following advantages: 1. Reliable sealing: The bottom water seal trough and water-cooled jacket feeder completely solve the sealing problem and prevent harmful gases from escaping; 2. Automated and efficient: Variable frequency feeding, rotary grate slag breaking, and automatic slag discharge improve processing efficiency by more than 30%; 3. Complete combustion: Bottom air supply + secondary air tangential intake ensures solid waste combustion efficiency ≥99.9% and significantly reduces the heat loss on ignition of residue; 4. Dioxin suppression: The rapid cooling tower avoids the dangerous temperature range, and combined with activated carbon adsorption, dioxin emissions meet the standards; 5. Corrosion resistance: The waste liquid spray gun uses Hastelloy nozzles, and the furnace body refractory material is heat-resistant to 1200℃, extending the equipment life by 2-3 times. Attached Figure Description

[0015] The present invention will now be further described with reference to the accompanying drawings.

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the pyrolysis gasification furnace system of this utility model; Figure 3 This is a schematic diagram of the structure of the secondary combustion chamber of this utility model; Figure 4 This is a schematic diagram of the structure of the waste liquid spray gun of this utility model. Detailed Implementation

[0017] like Figure 1-4 As shown, a vertical rotary high-temperature pyrolysis gasification furnace solid waste treatment system includes a feeding system 1, a pyrolysis gasification furnace system 2, a secondary combustion chamber 3, a heat exchanger system 4, a quench tower system 5, a dry deacidification tower system 6, and a bag filter system 7. The top of the feeding system 1 extends to the top opening of the pyrolysis gasification furnace system 2. The flue gas outlet of the pyrolysis gasification furnace system 2 is connected to the air inlet of the secondary combustion chamber 3. The top exhaust port of the secondary combustion chamber 3 is connected to the air inlet of the heat exchanger system 4. The exhaust end of the heat exchanger system 4 is connected to the top air inlet of the quench tower system 5. One side of the bottom of the quench tower system 5 is connected to the bottom of the dry deacidification tower system 6. The top of the dry deacidification tower system 6 is connected to the air inlet of the bag filter system 7. The suction end of the bag filter system 7 is connected to the exhaust end of the induced draft fan 8. The induced draft fan 8 sequentially creates negative pressure in the air ducts of the bag filter system 7, the dry deacidification tower system 6, the quench tower system 5, the heat exchanger system 4, and the secondary combustion chamber 3.

[0018] Specifically: The pyrolysis gasification furnace system 2 includes a pyrolysis gasification furnace hopper 201 and a roller feeding device 202 located at the bottom of the pyrolysis gasification furnace hopper 201. The bottom of the roller feeding device 202 is connected to a water seal sleeve 203, which is located at the top of the pyrolysis gasification furnace 204. The top edge of the grate 205 is connected and sealed to the lower end of the pyrolysis gasification furnace 204 through a water seal 206. The grate 205 has a tower-type eccentric structure and is driven to rotate by a gear drive device 207. It has a slag breaking function (slag is crushed by the relative movement of the furnace wall plate and the grate). The bottom of the pyrolysis gasification furnace 204 is connected to a rectangular bottom water seal groove 209. The conical opening 208 at the bottom of the grate 205 extends downward into the bottom water seal groove 209.

[0019] The secondary combustion chamber 3 includes a main body and a flue gas passage 303 on one side of the main body. The main body is a cylindrical vertical structure with a tangential flue gas inlet (to increase turbulence). It is equipped with a secondary air inlet and a waste liquid injection port. A waste liquid spray gun 302 is provided on the other side of the main body. Two rows of annular make-up air inlets 301 are provided in the middle of the main body. A flue gas outlet 304 is provided at the top of the main body. The waste liquid spray gun 302 includes a spray gun body and a spray gun head 3124 provided at the liquid outlet end of the spray gun body. A connecting flange 3123 is provided around the spray gun body. A waste liquid inlet 3121 and a compressed air inlet 3122 are provided at the outer end of the spray gun body. The spray gun body is made of 316L material. The spray gun head 3124, i.e. the nozzle part, is made of Hastelloy (C276). The atomization particle size is ≤70μm and the applicable air pressure is 0.3-0.4MPa.

[0020] The exhaust end of the induced draft fan 8 is connected to one side of the bottom of the wet deacidification system 9. The feeding system 1 is a material elevator, and the bottom of the material elevator is equipped with a solid waste feeding bucket 101. The bottom water seal trough 209 extends outward and is equipped with an inclined slag remover 2010, such as a single-chain scraper slag remover. The bottom of the slag remover 2010 is below the water surface of the bottom water seal trough 209, and the upper end of the slag remover 2010 extends outward and upward at an angle to prevent dust from flying and harmful gas from leaking. Liquid waste is filtered through the waste liquid pool 12 and then sprayed into the secondary combustion chamber by the waste liquid spray gun 302. The top of the quench tower system 5, the dry deacidification tower system 6, and the bag dust collector system 7 is equipped with an integrated maintenance platform with a fence.

[0021] The working principle of this utility model is as follows: Solid waste is placed in the material bucket 101 and fed into the pyrolysis gasification furnace system 2 by the feeding system 1. The material first enters the pyrolysis gasification furnace hopper 201 and is slowly and evenly fed into the pyrolysis gasification furnace 204 by the roller feeding device 202 at the bottom of the hopper. The bottom of the hopper has a water seal sleeve 203 to prevent heat radiation. The material is pyrolyzed and gasified in the pyrolysis gasification furnace 204. The slag after pyrolysis and gasification is discharged into the bottom water seal trough 209 through the grate 205 and discharged through the slag remover 2010. The grate 205 is a tower-type eccentric structure that can be rotated by the gear drive device 207. The grate 205 is connected and sealed to the pyrolysis gasification furnace 204 through the water seal 206. The gas generated by solid pyrolysis and gasification is introduced into the secondary combustion chamber 3 by an induced draft fan 8 for combustion. The flue gas enters the secondary combustion chamber 3 through 303. Waste liquid spray guns 302 are installed on the side, and the waste liquid is atomized by an atomizing pump and compressed air (waste liquid inlet 3121, compressed air inlet 3122, connecting flange 3123). The waste liquid is sprayed into the secondary combustion chamber 3 to mix and burn with the high-temperature flue gas. The temperature of the secondary combustion chamber can reach over 1100 degrees Celsius. There are two rows of annular air inlets 302 in the middle of the secondary combustion chamber. Air is injected at high speed through the air inlets by a high-pressure blower, which plays a role in oxygenation and turbulence. The fully combusted high-temperature flue gas then enters the heat exchanger system 4 to be cooled to 550 degrees Celsius, and then passes through the quench tower system 5 for quenching. The quench tower system 5 is the quench tower. The flue gas is designed in a co-current manner, entering from the top and being rapidly cooled from 550°C to below 200°C by atomized quench water (avoiding the dioxin resynthesis temperature range). After rapid cooling, the flue gas undergoes deacidification and dust reduction through a dry deacidification tower system 6 and a bag filter dust collection system 7. The dry deacidification tower system 6 employs a combined process of "dry deacidification + activated carbon injection + bag filter dust collection + wet deacidification" to effectively remove acidic gases (Cl, F, S, etc.) and heavy metals. In existing dry equipment, a cyclone effect is created using a cylindrical structure to cause some ash to settle, reducing the subsequent purification load. Activated carbon is then injected to adsorb and remove harmful substances. The purified flue gas is then sent to the wet deacidification system 9 by an induced draft fan 8 for secondary deacidification. The deacidified flue gas is then discharged into the atmosphere.

[0022] I. Solid Waste Treatment Process 1. Feeding: The crushed solid waste (particle size ≤10cm) enters the pyrolysis gasification furnace system 2 through the roller feeding device 202, and the liquid waste is filtered through the waste liquid pool 12 and then sprayed into the secondary combustion chamber by the waste liquid spray gun 302. 2. Pyrolysis gasification combustion: The temperature of the pyrolysis gasification furnace system 2 is controlled at 600-1200℃ (pyrolysis layer 600-750℃, oxidation layer 1100-1200℃), the secondary combustion chamber 3 is ≥1100℃, and the flue gas residence time is ≥2s; 3. Flue gas purification: After being rapidly cooled by the quench tower system 5, the flue gas passes sequentially through the dry desulfurization tower system 6 (slaked lime powder), activated carbon adsorption, bag filter dust collection system 7, and wet desulfurization system 9 (NaOH solution) before finally meeting emission standards.

[0023] II. Key Parameter Control Calorific value of solid waste: 12000-20000 KJ / kg for solid waste entering the furnace; acidic substance content: Cl < 5%, F < 0.05%, P < 0.2%; Parameters of waste liquid spray gun 302: waste liquid atomization particle size ≤70μm, air pressure 0.3-0.4MPa; The quench tower system achieves the following quenching effect: the flue gas temperature drops from 550℃ to below 200℃ in less than 1 second.

[0024] III. Equipment Maintenance Regular inspections: Clean the spray gun nozzles weekly, check the grate wear monthly, and replace the bag filter bags quarterly; Corrosion resistance protection: The waste liquid spray gun is made of Hastelloy alloy, and the furnace body is lined with corundum casting material, which effectively resists acid corrosion.

[0025] The above description is merely an illustrative embodiment of this utility model and is not intended to limit the scope of this utility model. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of this utility model should fall within the protection scope of this utility model.

Claims

1. A vertical rotary high-temperature pyrolysis gasification furnace solid waste treatment system, comprising a feeding system (1), a pyrolysis gasification furnace system (2), a secondary combustion chamber (3), a heat exchanger system (4), a quench tower system (5), a dry deacidification tower system (6), and a bag filter dust collection system (7), characterized in that: The top of the feeding system (1) extends to the top opening of the pyrolysis gasification furnace system (2). The flue gas outlet of the pyrolysis gasification furnace system (2) is connected to the air inlet of the secondary combustion chamber (3). The top exhaust port of the secondary combustion chamber (3) is connected to the air inlet of the heat exchanger system (4). The exhaust end of the heat exchanger system (4) is connected to the top air inlet of the quench tower system (5). One side of the bottom of the quench tower system (5) is connected to the bottom of the dry deacidification tower system (6). The top of the dry deacidification tower system (6) is connected to the air inlet of the bag filter system (7). The suction end of the bag filter system (7) is connected to the exhaust end of the induced draft fan (8). The induced draft fan (8) sequentially creates negative pressure in the air ducts of the bag filter system (7), the dry deacidification tower system (6), the quench tower system (5), the heat exchanger system (4), and the secondary combustion chamber (3).

2. The solid waste treatment system of a vertical rotary high-temperature pyrolysis gasification furnace as described in claim 1, characterized in that: The pyrolysis gasification furnace system (2) includes a pyrolysis gasification furnace hopper (201) and a roller feeding device (202) at the bottom of the pyrolysis gasification furnace hopper (201). The bottom of the roller feeding device (202) is connected to a water seal sleeve (203). The water seal sleeve (203) is located at the top of the pyrolysis gasification furnace (204). The top edge of the grate (205) is connected and sealed to the lower end of the pyrolysis gasification furnace (204) through a water seal (206). The grate (205) is a tower-type eccentric structure and is driven to rotate by a gear drive device (207). The bottom of the pyrolysis gasification furnace (204) is connected to a rectangular bottom water seal groove (209). The conical opening (208) at the bottom of the grate (205) extends downward into the bottom water seal groove (209).

3. The solid waste treatment system of a vertical rotary high-temperature pyrolysis gasification furnace as described in claim 1, characterized in that: The secondary combustion chamber (3) includes the main body of the secondary combustion chamber and a flue gas passage (303) set on one side of the main body of the secondary combustion chamber. A waste liquid spray gun (302) is set on the other side of the main body of the secondary combustion chamber. Two rows of annular air inlets (301) are set in the middle of the main body of the secondary combustion chamber. A flue gas outlet (304) is set on the top of the main body of the secondary combustion chamber.

4. The solid waste treatment system of a vertical rotary high-temperature pyrolysis gasification furnace as described in claim 1, characterized in that: The waste liquid spray gun (302) includes a spray gun body and a spray gun head (3124) provided at the liquid outlet end of the spray gun body. A connecting flange (3123) is provided around the spray gun body. A waste liquid inlet (3121) and a compressed air inlet (3122) are respectively provided at the outer end of the spray gun body.

5. The solid waste treatment system of a vertical rotary high-temperature pyrolysis gasification furnace as described in claim 1, characterized in that: The exhaust end of the induced draft fan (8) is connected to one side of the bottom of the wet deacidification system (9).

6. The solid waste treatment system of a vertical rotary high-temperature pyrolysis gasification furnace as described in claim 1, characterized in that: The feeding system (1) is a material elevator, and the bottom of the material elevator is equipped with a solid waste feeding bucket (101).

7. A vertical rotary high-temperature pyrolysis gasification furnace solid waste treatment system as described in claim 2, characterized in that: The bottom water seal trough (209) has an opening that extends outward and is equipped with an inclined slag remover (2010). The bottom of the slag remover (2010) is below the water surface of the bottom water seal trough (209), and the upper end of the slag remover (2010) extends outward and upward at an angle.

8. The solid waste treatment system of a vertical rotary high-temperature pyrolysis gasification furnace as described in claim 3, characterized in that: After being filtered through the waste liquid pool (12), the liquid waste is sprayed into the secondary combustion chamber (3) by the waste liquid spray gun (302).

9. A solid waste treatment system for a vertical rotary high-temperature pyrolysis gasification furnace as described in claim 1, characterized in that: The top of the quench tower system (5), the dry deacidification tower system (6) and the bag filter system (7) is equipped with an integrated maintenance platform with a fence.

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