Solid waste pyrolysis apparatus

Abstract

The utility model relates to solid waste treatment equipment technical field, concretely is a kind of solid waste pyrolysis device, comprising: pyrolysis furnace, pyrolysis furnace includes furnace body, and the feed inlet of furnace body is connected with feed assembly;Air-tight component, air-tight component includes air supply component and return air component.The utility model, by setting air-tight component, utilize combustion waste gas to move against material, cooperate return air component suction mixed gas, to avoid air mixed in material, ensure pyrolysis safety, without additional inert gas participation, reduce production cost;Utilize the waste heat of combustion waste gas to realize material preheating and dry material in moisture, improve pyrolysis efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of solid waste treatment equipment, specifically a solid waste pyrolysis device. Background Technology

[0002] Solid waste pyrolysis refers to the process of decomposing organic matter into combustible gas, tar, and solid residue by heating in an oxygen-deficient or anaerobic environment. Compared with direct incineration, pyrolysis can effectively reduce the emission of pollutants such as dioxins and heavy metals, while recovering usable energy such as pyrolysis gas and carbon black.

[0003] Because pyrolysis produces combustible gases, the pyrolysis furnace needs to maintain a slightly negative pressure or a sealed environment to prevent air from entering and causing the pyrolysis gas to burn or explode. Normally, air is mixed in with the material and enters through the feed inlet. Traditional solutions typically use nitrogen or other inert gases for sealing, but this technology is highly dependent on the gas source, requiring continuous gas replenishment, which is costly. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a solid waste pyrolysis device.

[0005] The technical solution of this utility model is:

[0006] A solid waste pyrolysis apparatus, comprising:

[0007] A pyrolysis furnace, the pyrolysis furnace including a furnace body, the furnace body inlet being connected to a feeding assembly, the feeding assembly including a screw feeder, the screw feeder inlet being connected to a rotary feed valve through a hopper, the rotary feed valve being used for quantitative feeding and sealing the top opening of the hopper;

[0008] An airtight assembly, comprising an air supply assembly and a return air assembly, wherein the air supply assembly is used to feed the treated combustion exhaust gas from the end of the screw feeder, and the return air assembly is used to discharge the mixed gas in the hopper.

[0009] Preferably, the screw feeder includes a feeding pipe, the end of which is provided with a power source, and the output shaft of the power source is inserted into the inside of the feeding pipe and connected to a screw feeding plate.

[0010] Preferably, the spiral feeder plate is a shaftless spiral plate.

[0011] Preferably, the hopper is located above the head of the feeding pipe, and the lower part of the feeding pipe is connected to the feed inlet of the furnace body through a first control valve.

[0012] Preferably, the air supply assembly includes an air supply pipe, the head of which is axially inserted from the end of the feeding pipe and the end face of the air supply pipe is sealed, and the head of the air supply pipe is provided with a plurality of through holes in the radial direction.

[0013] Preferably, the return air assembly includes a return air duct, which is located at the top of the side of the hopper. The connection between the return air duct and the hopper is inclined upward, forming an angle of 45-60° with the horizontal direction.

[0014] Preferably, a second cyclone separator is connected to the end of the return air duct, and a second fan is connected to the outlet of the second cyclone separator.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This invention, by setting up an airtight component, utilizes the reverse movement of combustion exhaust gas against the material, and cooperates with the return air component to draw in the mixed gas, so as to avoid air mixing into the material, ensure pyrolysis safety, eliminate the need for additional inert gas, and reduce production costs; it also utilizes the waste heat of combustion exhaust gas to preheat the material and dry the moisture in the material, thereby improving pyrolysis efficiency. Attached Figure Description

[0017] Figure 1 This is a first schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a second schematic diagram of the overall structure of this utility model;

[0019] Figure 3 This is an exploded view of the feeding assembly structure in this utility model;

[0020] Figure 4 This is a cross-sectional schematic diagram of the hopper structure in this utility model.

[0021] The meanings of the labels in the diagram are as follows:

[0022] 1. Pyrolysis furnace; 11. Furnace body; 12. First exhaust port; 13. First cyclone separator; 14. First blower;

[0023] 2. Feeding assembly; 21. Feeding pipe; 22. Power source; 23. Screw feeder plate; 24. First control valve; 25. Hopper; 26. Rotary feeder valve;

[0024] 3. Airtight components; 31. Supply air duct; 32. Second control valve; 33. Return air duct; 34. Second cyclone separator; 35. Second fan. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1:

[0027] Please see Figure 1-4 The present invention will describe the above technical solution in detail through the following embodiments:

[0028] A solid waste pyrolysis apparatus, comprising:

[0029] The pyrolysis furnace 1 includes a furnace body 11. The feed inlet of the furnace body 11 is connected to a feed assembly 2. The feed assembly 2 includes a screw feeder. The feed inlet of the screw feeder is connected to a rotary feed valve 26 through a hopper 25. The rotary feed valve 26 is used for quantitative feeding and sealing the top opening of the hopper 25.

[0030] When the rotary feeder valve 26 is working, it can periodically and quantitatively inject materials into the hopper 25 and reduce the gas exchange inside and outside the hopper 25.

[0031] The furnace body 11 has a first exhaust port 12 in the middle of its side for discharging pyrolysis gas. The first exhaust port 12 is connected to a first cyclone separator 13. The air outlet of the first cyclone separator 13 is connected to a first fan 14 through a pipe. When the first fan 14 is working, it can generate negative pressure to transport the pyrolysis gas to the next processing equipment.

[0032] The first cyclone separator 13 is used to separate particulate matter from pyrolysis gas.

[0033] Pyrolysis gas can be used for the incineration of carbonized products.

[0034] The screw feeder includes a feeding pipe 21, and a power source 22 is provided at the end of the feeding pipe 21. The output shaft of the power source 22 is inserted into the inside of the feeding pipe 21 and connected to a screw feeding plate 23.

[0035] The power source 22 uses a three-phase motor. When the power source 22 is working, it can drive the screw feeder 23 to rotate, thereby driving the material to move.

[0036] It is important to note that the screw feeder needs to be equipped with a support structure, such as a bracket, to prevent it from falling off due to excessive weight.

[0037] The spiral feed plate 23 is a shaftless spiral plate.

[0038] The shaftless design reduces material entanglement while facilitating airflow.

[0039] The hopper 25 is located above the head of the feeding pipe 21, and the lower part of the feeding pipe 21 is connected to the feed port of the furnace body 11 through the first control valve 24.

[0040] The first control valve 24 is a gate valve with a horizontally moving gate core, which can prevent material entanglement. When the first control valve 24 is closed, it can prevent the leakage of pyrolysis gas inside the furnace body 11.

[0041] Airtight component 3 includes an air supply component and a return air component. The air supply component is used to send the treated combustion exhaust gas from the end of the screw feeder, and the return air component is used to discharge the mixed gas in the hopper 25.

[0042] The exhaust gas hopper 25, after combustion, retains residual heat and contains almost no oxygen after treatment. It can be used for system closure and material drying.

[0043] The air supply assembly includes an air supply pipe 31. The head of the air supply pipe 31 is axially inserted from the end of the feeding pipe 21 and the end face of the air supply pipe 31 is sealed. The head of the air supply pipe 31 is provided with several through holes in the radial direction.

[0044] A second control valve 32 is threadedly connected to the middle of the air supply pipe 31. The second control valve 32 is an electric valve used to control the opening and closing of the air supply pipe 31.

[0045] When the second control valve 32 is opened, the exhaust gas enters the feeding pipe 21 from the air supply pipe 31, is discharged from the through hole at the head of the air supply pipe 31, and moves into the hopper 25 against the direction of material movement.

[0046] Because the air pressure inside the air supply duct 31 is greater than that outside, the through hole will not be blocked by material.

[0047] The return air assembly includes a return air duct 33, which is located on the top side of the hopper 25. The connection between the return air duct 33 and the hopper 25 is inclined upward, with an angle of 45-60° to the horizontal direction.

[0048] The return air duct 33 is inclined upward to prevent materials from entering the return air duct 33.

[0049] The return air duct 33 is connected to a second cyclone separator 34 at its end, and the outlet of the second cyclone separator 34 is connected to a second fan 35.

[0050] When the second blower 35 is working, it can create a negative pressure in the second cyclone separator 34, thereby discharging the mixed gas in the hopper 25.

[0051] The second cyclone separator 34 can remove impurities carried by the exhaust gas during the reverse flow process.

[0052] It should be noted that the gas after dust removal needs to be treated by air handling equipment before it can be discharged.

[0053] Working principle:

[0054] The rotary feeder valve 26 is controlled to operate, feeding the material into the hopper 25, and the material enters the feed pipe 21 from the hopper 25.

[0055] At the same time, the power source 22 is controlled to work, driving the spiral feeder plate 23 to rotate and feed the material into the furnace body 11 for pyrolysis.

[0056] During the feeding process, the second control valve 32 is opened to send the treated combustion exhaust gas into the feeding pipe 21 through the air supply pipe 31.

[0057] The exhaust gas moves against the direction of material movement, using the residual heat in the exhaust gas to dry the material, while ensuring that the inside of the feeding pipe 21 is an oxygen-free environment.

[0058] The flue gas flows counter-currently along the feed pipe 21 into the hopper 25.

[0059] The second blower 35 is controlled to operate, drawing the mixture of exhaust gas and a small amount of air fed into the hopper 25 by the rotary feed valve 26 into the second cyclone separator 34 to remove impurities. The discharged exhaust gas needs to pass through an air treatment device before it can be discharged.

[0060] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A solid waste pyrolysis device, characterized in that, include: The pyrolysis furnace (1) includes a furnace body (11), and a feeding assembly (2) is connected to the feed inlet of the furnace body (11). The feeding assembly (2) includes a screw feeder, and the feed inlet of the screw feeder is connected to a rotary feed valve (26) through a hopper (25). The rotary feed valve (26) is used for quantitative feeding and sealing the top opening of the hopper (25). Airtight component (3), the airtight component (3) includes an air supply component and a return air component, the air supply component is used to send the treated combustion exhaust gas from the end of the screw feeder, and the return air component is used to discharge the mixed gas in the hopper (25).

2. The solid waste pyrolysis device as described in claim 1, characterized in that: The screw feeder includes a feeding pipe (21), and a power source (22) is provided at the end of the feeding pipe (21). The output shaft of the power source (22) is inserted into the inside of the feeding pipe (21) and connected to a screw feeding plate (23).

3. The solid waste pyrolysis device as described in claim 2, characterized in that: The spiral feed plate (23) is a shaftless spiral plate.

4. A solid waste pyrolysis apparatus as described in claim 2, characterized in that: The hopper (25) is located above the head of the feeding pipe (21), and the lower part of the feeding pipe (21) is connected to the feed port of the furnace body (11) through the first control valve (24).

5. A solid waste pyrolysis apparatus as described in claim 2, characterized in that: The air supply assembly includes an air supply pipe (31), the head of which is axially inserted from the end of the feed pipe (21) and the end face of the air supply pipe (31) is sealed, and the head of the air supply pipe (31) is provided with several through holes in the radial direction.

6. A solid waste pyrolysis apparatus as described in claim 1, characterized in that: The return air assembly includes a return air duct (33), which is located on the top side of the hopper (25). The connection between the return air duct (33) and the hopper (25) is inclined upward, with an angle of 45-60° to the horizontal direction.

7. A solid waste pyrolysis apparatus as described in claim 6, characterized in that: The return air duct (33) is connected to a second cyclone separator (34) at its end, and the outlet of the second cyclone separator (34) is connected to a second fan (35).

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