Skid-mounted distributed garbage pyrolysis oil production process equipment

Abstract

The invention discloses skid-mounted distributed garbage pyrolysis oil production process equipment which comprises a first skid-mounted module, a second skid-mounted module and a third skid-mounted module, the first skid-mounted module comprises a pyrolysis rotary kiln, a pyrolysis oil condensing tower and a grinding pump, a gas-phase discharge port of the pyrolysis rotary kiln is communicated with the pyrolysis oil condensing tower, and a gas-phase discharge port of the pyrolysis rotary kiln is communicated with a gas-phase discharge port of the pyrolysis oil condensing tower; a pyrolytic oil outlet is formed in the bottom of the pyrolytic oil condensing tower, the pyrolytic oil outlet is connected with a feeding port of a grinding pump, a discharging port of the grinding pump is connected with a pyrolytic oil storage tank and a spraying nozzle of the pyrolytic oil condensing tower through a first pipeline and a second pipeline respectively, and the grinding pump is used for grinding pyrolytic oil flowing out of the pyrolytic oil outlet; the first skid-mounted module further comprises a heat exchanger and a pyrolytic oil conveying pump, the heat exchanger is used for cooling pyrolytic oil flowing out of the discharging port of the grinding pump, and the pyrolytic oil conveying pump is used for pumping the pyrolytic oil in the second pipeline to the spraying nozzle. According to the method, the garbage treatment difficulty and treatment cost of village-town-level administrative regions are reduced, and the economic benefits of garbage treatment are improved.

Description

Technical Field

[0001] This invention relates to the field of waste treatment equipment, and more specifically to a skid-mounted distributed waste pyrolysis oil production process equipment. Background Technology

[0002] Currently, the recycling of municipal solid waste in major Chinese cities primarily relies on centralized incineration power generation technology, with relatively complete supporting power generation and flue gas purification systems. However, waste management in village and town-level administrative regions faces fundamental differences: waste generation is small-scale and dispersed. Adopting the large-scale centralized incineration model of major cities would face numerous challenges, including huge project investments, difficulties in site selection, and uneconomical operation. Furthermore, transporting scattered village and town waste over long distances to regional treatment centers incurs high transportation costs and increases the risk of secondary pollution, which, from a life-cycle perspective, does not align with the principles of energy conservation and carbon reduction. Simultaneously, the demand for "green fuels" is growing, and municipal solid waste, as a continuously generated and widely sourced organic resource, could provide a highly promising raw material for green fuel production if it could be converted on-site into high-energy-density pyrolysis oil, achieving true "waste-to-treasure" and resource recycling. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of high transportation costs and low economic benefits of domestic waste in rural and township-level administrative regions in the prior art, and to provide a skid-mounted distributed waste pyrolysis oil production process equipment.

[0004] The present invention solves the above-mentioned technical problems through the following technical solution:

[0005] This invention provides a skid-mounted distributed waste pyrolysis oil production process device, including a first skid-mounted module, a second skid-mounted module, and a third skid-mounted module. The first skid-mounted module includes a pyrolysis rotary kiln, a pyrolysis oil condenser, and a grinding pump. The gas phase outlet of the pyrolysis rotary kiln is connected to the pyrolysis oil condenser. The bottom of the pyrolysis oil condenser is provided with a pyrolysis oil outlet, which is connected to the inlet of the grinding pump. The outlet of the grinding pump is connected to a pyrolysis oil storage tank and a spray nozzle of the pyrolysis oil condenser through a first pipe and a second pipe, respectively. The grinding pump is used to grind the pyrolysis oil flowing out of the pyrolysis oil outlet.

[0006] The first skid-mounted module also includes a heat exchanger and a pyrolysis oil delivery pump. The heat exchanger is used to cool the pyrolysis oil flowing out of the outlet of the milling pump. The pyrolysis oil delivery pump is used to pump the pyrolysis oil in the second pipe to the spray nozzle. Both the first pipe and the second pipe are equipped with control valves.

[0007] The second skid-mounted module includes a feeding system for conveying municipal solid waste to be pyrolyzed into the pyrolysis rotary kiln. The third skid-mounted module includes an electrical control mechanism for providing power to and controlling the operation of the skid-mounted distributed waste pyrolysis oil production process equipment.

[0008] In this solution, the waste pyrolysis oil production equipment is disassembled into multiple independent modules using a skid-mounted modular design, facilitating transportation and assembly. This allows the equipment to be transported to village and town-level administrative regions for on-site pyrolysis of domestic waste, reducing the difficulty and cost of waste treatment in these areas and improving the economic efficiency of waste management. The pyrolysis oil obtained from the pyrolysis of domestic waste is ground and cooled by a grinding pump before being sent back to a pyrolysis oil condensation tower for spray cooling of the pyrolysis gas. This process not only grinds small particles of dust in the pyrolysis oil into fine particles to prevent clogging of the spray nozzles, but also avoids the use of traditional water spraying, which dilutes the pyrolysis oil, increasing storage difficulties and subsequent processing costs.

[0009] In one embodiment, the pyrolysis oil condensing tower includes a primary condensing tower and a secondary condensing tower. Both the primary and secondary condensing towers are equipped with spray nozzles. Below the spray nozzles of the primary and secondary condensing towers are respectively provided an outlet and an inlet. The outlet and the inlet are connected by a pipeline.

[0010] In this scheme, the pyrolysis gas generated from the pyrolysis rotary kiln is cooled in stages by two-stage cooling towers. By controlling the cooling temperature, the first-stage condenser recovers heavy oil from the pyrolysis gas, and the second-stage condenser collects moisture and light oil from the pyrolysis gas. The ratio of the two pyrolysis oils can be adjusted according to the requirements to obtain pyrolysis oil that meets the requirements.

[0011] Preferably, the grinding pump is connected to the pyrolysis oil outlet of the primary condenser.

[0012] In this scheme, since the product of the first-stage condenser is heavy oil containing small dust particles, which can easily clog the spray nozzles, a grinding pump is only installed at the pyrolysis oil outlet of the first-stage condenser to reduce equipment costs.

[0013] Preferably, the temperature of the pyrolysis gas in the primary condenser is controlled to drop to 150~300℃, more preferably 200~250℃;

[0014] And / or, the temperature of the pyrolysis gas in the secondary condenser is controlled to drop to 30~80℃, preferably 40~50℃.

[0015] In this scheme, the temperature of the pyrolysis gas in the primary and secondary condenser towers is controlled within the above-mentioned temperature range, which facilitates the staged cooling of the pyrolysis gas.

[0016] In one embodiment, the first skid-mounted module further includes a flue gas purification mechanism, which includes an oxidation furnace. The upper end of the pyrolysis oil condensation tower is provided with a non-condensable gas outlet, which is connected to the oxidation furnace.

[0017] In this scheme, the non-condensable gases in the pyrolysis products are treated by an oxidation furnace to avoid direct emission and air pollution.

[0018] Preferably, the flue gas purification mechanism further includes an alkaline spray tower and an activated carbon adsorption tower, and the flue gas outlet of the oxidation furnace is sequentially connected to the alkaline spray tower and the activated carbon adsorption tower.

[0019] In this scheme, acidic pollutants such as SO2 and HCl are removed from the flue gas after treatment by the oxidation furnace through an alkaline spray tower, and pollutants such as dioxins are removed through an activated carbon adsorption tower, thereby further avoiding air pollution.

[0020] Preferably, the oxidation furnace is a catalytic oxidation furnace or a direct-fired oxidation furnace.

[0021] In one embodiment, the feeding system includes a sealed feeding valve assembly, which includes a feed bin and a screw feed mechanism. The feed bin is located at the feed inlet of the screw feed mechanism, and the discharge outlet of the screw feed mechanism is detachably connected to the feed inlet of the pyrolysis rotary kiln.

[0022] In this scheme, the sealed feeding valve group prevents outside air from being sent into the pyrolysis rotary kiln when conveying domestic waste, effectively controlling the oxygen content in the pyrolysis rotary kiln and ensuring an oxygen-free pyrolysis environment.

[0023] Preferably, the feeding system further includes a feeding belt and a buffer hopper. The feeding belt is used to transport the domestic waste to be processed into the buffer hopper, and the outlet of the buffer hopper is connected to the inlet of the sealed feeding valve assembly through a waste conveying mechanism.

[0024] In this solution, the above structure enables rapid transport and storage of excess domestic waste, facilitating the transport of the equipment to the next waste disposal site and improving waste disposal efficiency.

[0025] In one embodiment, the pyrolysis rotary kiln further includes a solid discharge port, which is connected to a slag discharge mechanism.

[0026] Preferably, the slag discharge mechanism includes a cooling spiral feeding mechanism and a waste slag storage device. The feed end of the cooling spiral feeding mechanism is connected to the solid phase discharge port, and the discharge end of the cooling spiral feeding mechanism is connected to the waste slag storage device. The waste slag storage device stores the solid waste slag discharged from the solid phase discharge port.

[0027] In this scheme, the solid waste residue after pyrolysis can be cooled and transported to the waste residue storage device by a cooling screw feeding mechanism.

[0028] Preferably, the temperature of the solid waste residue at the outlet of the cooling spiral feeding mechanism is controlled at 80~120℃, more preferably 80~100℃.

[0029] In one embodiment, the pyrolysis rotary kiln employs indirect heating, electric heating, or electromagnetic induction heating.

[0030] In one embodiment, the pyrolysis temperature of the pyrolysis rotary kiln is 350~600℃, preferably 400~500℃, and more preferably 450℃.

[0031] In one embodiment, a drag chain coke removal structure is provided inside the pyrolysis rotary kiln.

[0032] In this solution, a drag chain is installed on the inner wall of the pyrolysis rotary kiln. The drag chain rotates with the pyrolysis rotary kiln and continuously slides relative to the inner wall of the pyrolysis rotary kiln, realizing online non-powered coking, ensuring the cleanliness of the pyrolysis rotary kiln wall, avoiding heat transfer deterioration in the pyrolysis rotary kiln and affecting the pyrolysis efficiency.

[0033] In one embodiment, the heat exchanger is a shell-and-tube condenser.

[0034] In one embodiment, the first skid-mounted module further includes a cyclone dust collector, the gas outlet of the pyrolysis rotary kiln is connected to the cyclone dust collector via a pipeline, and the gas outlet of the cyclone dust collector is connected to the pyrolysis oil condenser via a pipeline.

[0035] In this scheme, a cyclone dust collector is used to remove large particles from the gas phase of pyrolysis gas and send them into the ash silo, thus preventing large dust particles from entering the pyrolysis oil condensation tower.

[0036] The positive and progressive effects of this invention are as follows: By using a skid-mounted modular design, the waste pyrolysis oil production equipment is disassembled into multiple independent modules, facilitating transportation and assembly. This allows the equipment to be transported to village and town-level administrative regions for on-site pyrolysis of domestic waste, reducing the difficulty and cost of waste treatment in these areas and improving the economic efficiency of waste management. Furthermore, the pyrolysis oil obtained from the pyrolysis of domestic waste is ground and cooled by a grinding pump before being sent back to a pyrolysis oil condensation tower for spray cooling of the pyrolysis gas. This process not only grinds small particles of dust in the pyrolysis oil into fine particles to prevent clogging of the spray nozzles, but also avoids the use of traditional water spraying, which dilutes the pyrolysis oil, increasing storage difficulties and subsequent processing costs. Attached Figure Description

[0037] Figure 1This is a schematic diagram showing the connections of various components inside the skid-mounted distributed waste pyrolysis oil production process equipment after the outer casing has been removed in an embodiment of the present invention.

[0038] Figure 2 This is a schematic diagram of the pyrolysis gas condensation process in an embodiment of the present invention.

[0039] Figure 3 This is a schematic diagram of the structure of the pyrolysis rotary kiln in an embodiment of the present invention.

[0040] Explanation of reference numerals in the attached figures:

[0041] First skid-mounted module 100;

[0042] 110 pyrolysis rotary kiln, 111 inner cylinder, 112 outer shell, 113 heating mechanism, 114 insulation layer, 115 drag chain, 116 material collection hood;

[0043] Cyclone dust collector 120

[0044] 130 pyrolysis oil condenser;

[0045] Primary condenser 131, first spray nozzle 1311, air outlet 1312;

[0046] Secondary condenser 132, second spray nozzle 1321, air inlet 1322;

[0047] First heat exchanger 140;

[0048] Second heat exchanger 150;

[0049] Oxidation furnace 160;

[0050] Alkali spray tower 170;

[0051] Activated carbon adsorption tower 180;

[0052] Slag removal mechanism 190;

[0053] Second skid-mounted module 200;

[0054] Sealed feeding valve assembly 210, feeding bin 211, screw feeding mechanism 212;

[0055] Buffer hopper 220;

[0056] 230 feed belt;

[0057] Third skid-mounted module 300;

[0058] 400 grinding pump;

[0059] First pyrolysis oil transfer pump 500;

[0060] Second pyrolysis oil transfer pump 600;

[0061] 700 pyrolysis oil storage tank. Detailed Implementation

[0062] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0063] like Figures 1-3 As shown, this embodiment provides a skid-mounted distributed waste pyrolysis oil production process device, including a first skid-mounted module 100, a second skid-mounted module 200, and a third skid-mounted module 300. The first skid-mounted module 100 includes a pyrolysis rotary kiln 110, a pyrolysis oil condenser tower 130, and a grinding pump 400. The gas phase outlet of the pyrolysis rotary kiln 110 is connected to the pyrolysis oil condenser tower 130. The bottom of the pyrolysis oil condenser tower 130 is provided with a pyrolysis oil outlet, which is connected to the inlet of the grinding pump 400. The outlet of the grinding pump 400 is connected to the pyrolysis oil storage tank 700 and the spray nozzle of the pyrolysis oil condenser tower 130 through a first pipe and a second pipe, respectively. The grinding pump 400 is used to grind the pyrolysis oil flowing out of the pyrolysis oil outlet.

[0064] The first skid-mounted module 100 also includes a heat exchanger and a pyrolysis oil delivery pump. The heat exchanger is used to cool the pyrolysis oil flowing out of the outlet of the milling pump 400, and the pyrolysis oil delivery pump is used to pump the pyrolysis oil in the second pipeline to the spray nozzle. Both the first pipeline and the second pipeline are equipped with control valves.

[0065] The second skid-mounted module 200 includes a feeding system for conveying municipal solid waste to be pyrolyzed into the pyrolysis rotary kiln 110. The third skid-mounted module 300 includes an electrical control mechanism for providing power to the skid-mounted distributed waste pyrolysis oil production process equipment and controlling its operation.

[0066] In this embodiment, the waste pyrolysis oil production equipment is disassembled into multiple independent modules using a skid-mounted modular design, facilitating transportation and assembly. This allows the equipment to be transported to village / township-level administrative regions for on-site pyrolysis of domestic waste, reducing the difficulty and cost of waste treatment in these areas and improving the economic efficiency of waste management. The pyrolysis oil obtained from the pyrolysis of domestic waste is ground by a grinding pump 400, cooled, and then fed back into the pyrolysis oil condensation tower 130 for spray cooling of the pyrolysis gas. This process not only grinds small dust particles in the pyrolysis oil into fine particles to prevent clogging of the spray nozzles, but also avoids the use of traditional water spraying, which dilutes the pyrolysis oil, increasing storage difficulties and subsequent processing costs.

[0067] Furthermore, since the target product of this waste pyrolysis to oil production process is pyrolysis oil, conventional oil condensation methods include water spraying and tube condensation. After water spraying condensation, an oil-water separator is required to separate the oil and water phases. During this process, a large amount of water enters the pyrolysis oil, resulting in a high water content. Simultaneously, light components are lost with the water phase during separation, reducing yield. In addition, the separated water phase contains organic components, thus constituting organic wastewater, which incurs significant energy consumption and equipment costs during treatment. Tube condensation is prone to coking during pyrolysis oil condensation, especially with ash-containing pyrolysis gas, which forms sludge after condensation, causing blockages. Due to the limitations of the tube condenser design, cleaning is difficult, severely impacting continuous production. This waste pyrolysis to oil production process uses a self-circulating spray condensation tower for pyrolysis oil, effectively avoiding the above problems.

[0068] It should be noted that the specific structure and control logic of the electrical control mechanism do not involve the innovation of this invention, and therefore will not be described in detail. It is only presented as a fully functional module used to provide a stable power supply and implement basic operational logic control for the subsequent skid-mounted distributed waste pyrolysis oil production process equipment. The specific internal circuit structure, logic control program, and selection and layout of electrical components are not described in detail. This is because, in the field of industrial electrical automation control, using combinations of electrical components to achieve specific functions such as power-on, power-off, delay, and control adjustment is a conventional technique well-known to those skilled in the art. Once those skilled in the art understand the functions required by the electrical control mechanism in this application (i.e., supplying power to the pyrolysis equipment and controlling its operation based on process parameters), they can, based on their professional knowledge, select suitable electrical components from the prior art and build a control loop that meets the requirements to realize the skid-mounted distributed waste pyrolysis oil production process equipment of this application.

[0069] In this embodiment, the pyrolysis oil condenser 130 includes a primary condenser 131 and a secondary condenser 132. The primary condenser 131 and the secondary condenser 132 are respectively provided with a first spray nozzle 1311 and a second spray nozzle 1321. Below the spray nozzles of the primary condenser 131 and the secondary condenser 132, respectively, there are air outlets 1312 and air inlets 1322. The air outlets 1312 and air inlets 1322 are connected by a pipeline. The pyrolysis gas after being sprayed in the primary condenser 131 is introduced into the secondary condenser 132 for processing by a pump.

[0070] The pyrolysis gas generated from the pyrolysis rotary kiln 110 is cooled in stages by two-stage cooling towers. By controlling the cooling temperature, the first-stage condenser 131 recovers heavy oil from the pyrolysis gas, and the second-stage condenser 132 collects moisture and light oil from the pyrolysis gas. The ratio of the two pyrolysis oils can be adjusted according to the requirements to obtain pyrolysis oil that meets the requirements.

[0071] like Figure 2As shown, the pyrolysis oil outlets at the bottom of the primary condenser 131 and the secondary condenser 132 are connected to the pyrolysis oil storage tank 700 and the corresponding spray nozzle of the pyrolysis oil condenser 130 via different pipes. Since the product of the primary condenser 131 is heavy oil containing small dust particles, which easily clogs the spray nozzles, a grinding pump 400 is only installed at the pyrolysis oil outlet of the primary condenser 131 to reduce equipment costs. A first heat exchanger 140 and a second heat exchanger 150, as well as a first pyrolysis oil transfer pump 500 and a second pyrolysis oil transfer pump 600, are respectively installed on the pipes connecting the primary condenser 131 and the secondary condenser 132 to the corresponding pyrolysis oil condenser 130 to cool and transport the pyrolysis oil to be delivered to the corresponding primary condenser 131 and secondary condenser 132. In this embodiment, the heat exchanger is a shell-and-tube condenser.

[0072] When the pyrolysis gas is spray-cooled through a primary condenser 131 and a secondary condenser 132, the temperature of the pyrolysis gas in the primary condenser 131 is controlled to decrease to 150~300℃, preferably 200~250℃; the temperature of the pyrolysis gas in the secondary condenser 132 is controlled to decrease to 30~80℃, preferably 40~50℃. Maintaining the temperature of the pyrolysis gas in the primary condenser 131 and the secondary condenser 132 within the above temperature range facilitates staged cooling of the pyrolysis gas.

[0073] In a preferred embodiment, the first skid-mounted module 100 further includes a flue gas purification mechanism, which includes an oxidizer 160. A non-condensable gas outlet is provided at the upper end of the pyrolysis oil condensation tower 130, and this outlet is connected to the oxidizer 160. The oxidizer 160 treats the non-condensable gas in the pyrolysis products, preventing direct emissions and air pollution. The oxidizer 160 can be selected as a catalytic oxidizer 160 (CO furnace), a direct-fired oxidizer 160 (TO furnace), or other types of combustion furnaces to generate flue gas.

[0074] The flue gas purification system also includes an alkaline spray tower 170 and an activated carbon adsorption tower 180. The flue gas outlet of the oxidizer 160 is sequentially connected to the alkaline spray tower 170 and the activated carbon adsorption tower 180. The alkaline spray tower 170 removes acidic pollutants such as SO2 and HCl from the flue gas treated by the oxidizer 160, and the activated carbon adsorption tower 180 removes pollutants such as dioxins, further preventing air pollution.

[0075] In this embodiment, the feeding system includes a sealed feeding valve assembly 210, which includes a feeding bin 211 and a screw feeding mechanism 212. The feeding bin 211 is located at the inlet of the screw feeding mechanism 212, and the outlet of the screw feeding mechanism 212 is detachably connected to the inlet of the pyrolysis rotary kiln 110.

[0076] The feed hopper 211 is equipped with a slide gate valve and a double-sealed flap valve, which open and close sequentially at set times to ensure continuous and sealed entry of materials into the screw feeder 212. The sealed feeding valve group 210 prevents outside air from being introduced into the pyrolysis rotary kiln 110 when conveying domestic waste, effectively controlling the oxygen content inside the pyrolysis rotary kiln 110 and ensuring an oxygen-free pyrolysis environment.

[0077] In a preferred embodiment, the feeding system further includes a feeding belt 230 and a buffer hopper 220. The feeding belt 230 is used to transport the municipal solid waste to be processed into the buffer hopper 220. The outlet of the buffer hopper 220 is connected to the inlet of the sealed feeding valve assembly 210 via a waste conveying mechanism. The buffer hopper 220 is also equipped with a disc feeder and a weighing device to achieve quantitative feeding. With the above structure, rapid conveying and storage of excessive municipal solid waste can be achieved, facilitating the transportation of the equipment to the next waste treatment site and improving waste treatment efficiency.

[0078] The first skid-mounted module 100 also includes a cyclone dust collector 120. The gas phase outlet of the pyrolysis rotary kiln 110 is connected to the cyclone dust collector 120 via a pipe, and the gas outlet of the cyclone dust collector 120 is connected to the pyrolysis oil condenser tower 130 via a pipe. The pyrolysis gas generated in the pyrolysis rotary kiln 110 enters the cyclone dust collector 120 through a pipe above the tail end collection hood 116 of the pyrolysis rotary kiln 110. The cyclone dust collector 120 removes large particles from the pyrolysis gas and sends them into the ash silo, preventing large dust particles from entering the pyrolysis oil condenser tower 130. In this embodiment, there are two cyclone dust collectors 120, effectively preventing large dust particles from entering the primary condenser tower 131.

[0079] In this embodiment, the pyrolysis rotary kiln 110 further includes a solid discharge port, which is connected to the slag discharge mechanism 190. The slag discharge mechanism 190 includes a cooling screw feeder and a waste slag storage device. The feed end of the cooling screw feeder is connected to the solid discharge port, and the discharge end of the cooling screw feeder is connected to the waste slag storage device. The waste slag storage device stores the solid waste slag discharged from the solid discharge port. The cooling screw feeder can cool the pyrolysis solid waste slag and transport it to the waste slag storage device.

[0080] After municipal solid waste is pyrolyzed in the rotary kiln 110, the resulting solid pyrolytic carbon enters the cooling spiral of the cooling spiral feeding mechanism through the tail end collection hood 116 of the rotary kiln 110. The cooling spiral removes the heat of the pyrolytic carbon through a water-cooled jacket, a water-cooled shaft, and a spray device, ensuring that the temperature of the pyrolytic carbon at the outlet is between 80 and 120°C. The specific temperature of the pyrolytic carbon depends on the storage method of the solid products at the downstream end. If there is a buffer silo 220, the preferred temperature is 100°C; if direct transfer in ton bags is used, the preferred temperature is 80°C.

[0081] The pyrolysis rotary kiln 110 can employ various heating methods, such as indirect heating, electric heating, or electromagnetic induction heating, which can be selected according to the user's actual needs. When pyrolyzing municipal solid waste, the pyrolysis temperature of the pyrolysis rotary kiln 110 is 350~600℃, preferably 400~500℃, and more preferably 450℃.

[0082] like Figure 3 As shown, the pyrolysis rotary kiln 110 includes an inner cylinder 111, an outer shell 112, a heat insulation layer 114, and a heating mechanism 113. The heating mechanism 113 is disposed on the inner cylinder 111 between the inner cylinder 111 and the outer shell 112, and the heat insulation layer 114 is disposed on the outside of the heating mechanism 113.

[0083] The inner cylinder 111 of the pyrolysis rotary kiln 110 is equipped with a drag chain descaling structure, which includes multiple drag chains 115 spaced apart along the length of the inner cylinder 111. By installing drag chains 115 on the inner wall of the pyrolysis rotary kiln 110, the drag chains 115 rotate with the pyrolysis rotary kiln 110 and continuously slide relative to the inner wall of the inner cylinder 111 of the pyrolysis rotary kiln 110, achieving online descaling without power, ensuring the cleanliness of the wall surface of the pyrolysis rotary kiln 110, and avoiding heat transfer deterioration in the pyrolysis rotary kiln 110, which would affect the pyrolysis efficiency.

[0084] In this embodiment, the feeding belt 230, buffer silo 220, and sealed feeding valve group 210 constitute the feeding system and form the second skid-mounted module 200, which measures 5m*3m*3m. The electrical control cabinet is a separate third skid-mounted module 300, featuring an explosion-proof design and measuring 6m*3m*3m. Other equipment constitutes the first skid-mounted module 100, which measures 17m*3m*3m. The first skid-mounted module 100, the second skid-mounted module 200, and the third skid-mounted module 300 are installed in different enclosures for easy independent transportation. This skid-mounted distributed waste pyrolysis oil production process equipment is designed to process 2.5 tons / day, and the main reactor pyrolysis rotary kiln 110 uses electromagnetic heating. The temperature of the pyrolysis gas in the primary condenser tower 131 is controlled to decrease to 200℃, and the temperature of the pyrolysis gas in the secondary condenser tower 132 is controlled to decrease to 50℃.

[0085] Pyrolysis temperature is a key parameter affecting the distribution of products (oil, gas, and char). For municipal solid waste, under anaerobic or low-oxygen conditions, the pyrolysis oil yield typically peaks within the following temperature range:

[0086]

[0087] In this embodiment, the pyrolysis temperature is controlled at around 450℃, and the pyrolysis oil recovery rate is about 32.5%, of which the oil recovery rate of the first-stage condenser is about 26% and the oil recovery rate of the second-stage condenser is about 6.5%.

[0088] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A skid-mounted distributed waste pyrolysis oil production process equipment, characterized in that: The system includes a first skid-mounted module, a second skid-mounted module, and a third skid-mounted module. The first skid-mounted module includes a pyrolysis rotary kiln, a pyrolysis oil condenser, and a grinding pump. The gas phase outlet of the pyrolysis rotary kiln is connected to the pyrolysis oil condenser. The bottom of the pyrolysis oil condenser is provided with a pyrolysis oil outlet, which is connected to the feed inlet of the grinding pump. The discharge outlet of the grinding pump is connected to a pyrolysis oil storage tank and a spray nozzle of the pyrolysis oil condenser through a first pipe and a second pipe, respectively. The grinding pump is used to grind the pyrolysis oil flowing out of the pyrolysis oil outlet. The first skid-mounted module also includes a heat exchanger and a pyrolysis oil delivery pump. The heat exchanger is used to cool the pyrolysis oil flowing out of the outlet of the milling pump. The pyrolysis oil delivery pump is used to pump the pyrolysis oil in the second pipe to the spray nozzle. Both the first pipe and the second pipe are equipped with control valves. The second skid-mounted module includes a feeding system for conveying municipal solid waste to be pyrolyzed into the pyrolysis rotary kiln. The third skid-mounted module includes an electrical control mechanism for providing power to and controlling the operation of the skid-mounted distributed waste pyrolysis oil production process equipment.

2. The skid-mounted distributed waste pyrolysis oil production process equipment as described in claim 1, characterized in that, The pyrolysis oil condensing tower includes a primary condensing tower and a secondary condensing tower. Both the primary and secondary condensing towers are equipped with spray nozzles. Below the spray nozzles of the primary and secondary condensing towers are respectively provided an air outlet and an air inlet, which are connected by a pipeline.

3. The skid-mounted distributed waste pyrolysis oil production process equipment as described in claim 2, characterized in that, The grinding pump is connected to the pyrolysis oil outlet of the primary condenser; And / or, the temperature of the pyrolysis gas in the primary condenser is controlled to drop to 150~300℃, preferably 200~250℃; And / or, the temperature of the pyrolysis gas in the secondary condenser is controlled to drop to 30~80℃, preferably 40~50℃.

4. The skid-mounted distributed waste pyrolysis oil production process equipment as described in claim 1, characterized in that, The first skid-mounted module also includes a flue gas purification mechanism, which includes an oxidation furnace. The upper end of the pyrolysis oil condensation tower is provided with a non-condensable gas outlet, which is connected to the oxidation furnace.

5. The skid-mounted distributed waste pyrolysis oil production process equipment as described in claim 4, characterized in that, The flue gas purification mechanism also includes an alkaline spray tower and an activated carbon adsorption tower, and the flue gas outlet of the oxidation furnace is connected in sequence to the alkaline spray tower and the activated carbon adsorption tower. And / or, the oxidation furnace is a catalytic oxidation furnace or a direct-fired oxidation furnace.

6. The skid-mounted distributed waste pyrolysis oil production process equipment as described in claim 1, characterized in that, The feeding system includes a sealed feeding valve assembly, which includes a feed bin and a screw feeding mechanism. The feed bin is located at the feed inlet of the screw feeding mechanism, and the discharge outlet of the screw feeding mechanism is detachably connected to the feed inlet of the pyrolysis rotary kiln.

7. The skid-mounted distributed waste pyrolysis oil production process equipment as described in claim 6, characterized in that, The feeding system also includes a feeding belt and a buffer hopper. The feeding belt is used to transport the domestic waste to be processed into the buffer hopper. The outlet of the buffer hopper is connected to the inlet of the sealed feeding valve assembly through a waste conveying mechanism.

8. The skid-mounted distributed waste pyrolysis oil production process equipment as described in claim 1, characterized in that, The pyrolysis rotary kiln also includes a solid discharge port, which is connected to the slag discharge mechanism.

9. The skid-mounted distributed waste pyrolysis oil production process equipment as described in claim 8, characterized in that, The slag discharge mechanism includes a cooling spiral feeding mechanism and a waste slag storage device. The feed end of the cooling spiral feeding mechanism is connected to the solid phase discharge port, and the discharge end of the cooling spiral feeding mechanism is connected to the waste slag storage device. The waste slag storage device stores the solid waste slag discharged from the solid phase discharge port. And / or, the temperature of the solid waste residue at the outlet of the cooling spiral feeding mechanism is controlled at 80~120℃, preferably 80~100℃.

10. The skid-mounted distributed waste pyrolysis oil production process equipment as described in claim 1, characterized in that, The pyrolysis rotary kiln uses indirect heating, electric heating, or electromagnetic induction heating. And / or, the pyrolysis temperature of the pyrolysis rotary kiln is 350~600℃, preferably 400~500℃, more preferably 450℃; And / or, the pyrolysis rotary kiln is equipped with a drag chain coke removal structure; And / or, the heat exchanger is a shell-and-tube condenser; And / or, the first skid-mounted module further includes a cyclone dust collector, the gas outlet of the pyrolysis rotary kiln is connected to the cyclone dust collector via a pipeline, and the gas outlet of the cyclone dust collector is connected to the pyrolysis oil condenser via a pipeline.

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