Sludge and organic solid waste synergistic pyrolysis system and method

Abstract

The invention belongs to the technical field of sludge treatment, and particularly relates to a sludge and organic solid waste collaborative pyrolysis system and method.The sludge and organic solid waste collaborative pyrolysis system comprises a pretreatment unit, a pyrolysis reaction unit, a heat exchange unit, an oil gas condensation unit, a waste gas purification unit and a control unit; the pretreatment unit is used for uniformly mixing sludge and organic solid waste; by means of the structural design that the feeding unit, the pretreatment unit, the pyrolytic reaction unit, the heat exchange unit, the oil gas condensation unit, the waste gas purification unit and the control unit are arranged and cooperate with one another to pyrolyze sludge and organic solid waste, the waste treatment efficiency is effectively improved, and the occupied area and the operation cost are reduced; the problems that the traditional single material pyrolysis technology is difficult to overcome the limitation of raw material characteristics, the organic solid waste possibly contains more inert components, the quality of the final product can be influenced, the cost of independent treatment is higher, the economic benefit is not obvious, and large-scale popularization and application are difficult are effectively solved.

Description

Technical Field

[0001] The invention belongs to the technical field of sludge treatment, and specifically relates to a sludge and organic solid waste coordinated pyrolysis system and method. Background Art

[0002] Traditional sludge treatment methods such as landfill, incineration and composting can alleviate environmental pressure to a certain extent, but there are also problems such as occupying land resources and secondary pollution. In recent years, pyrolysis has attracted widespread attention as a new type of waste treatment technology. It can decompose organic matter into useful products such as oil, gas and charcoal at a lower temperature, achieving the goals of waste reduction, harmlessness and resource utilization.

[0003] Existing sludge treatment methods mainly include landfill, incineration and composting. The landfill method is simple and easy, but it occupies a large area and is prone to groundwater pollution; the incineration method can greatly reduce the volume, but it is costly and may produce harmful gases such as dioxins; the composting method is a biochemical process that can produce fertilizers, but it is time-consuming and inefficient. For organic solid waste, pyrolysis technology has become a more ideal treatment method because it can achieve effective conversion of materials under low temperature conditions. However, when treating a certain type of waste alone, it is often impossible to achieve the optimal pyrolysis conditions, resulting in limited product quality and output.

[0004] Traditional single-material pyrolysis technology is difficult to overcome the limitations of raw material characteristics, such as high moisture content and low calorific value of sludge, while organic solid waste may contain more inert components, all of which will affect the quality of the final product. In addition, the cost of separate treatment is high, the economic benefits are not obvious, and it is difficult to promote and apply on a large scale.

[0005] To this end, the present invention provides a sludge and organic solid waste coordinated pyrolysis system and method. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve its technical problem is: a sludge and organic solid waste coordinated pyrolysis system described in the present invention comprises a pretreatment unit, a pyrolysis reaction unit, a heat exchange unit, an oil and gas condensation unit, an exhaust gas purification unit and a control unit; The pretreatment unit is used to mix the sludge and organic solid waste evenly and adjust them to suitable moisture and particle size; The pyrolysis reaction unit can utilize thermochemical action to convert organic matter into bio-oil, char, synthesis gas and reaction water under anaerobic conditions, thereby pyrolyzing sludge and organic solid waste. The heat exchange unit is used to recover the heat of high-temperature flue gas and improve energy utilization; The oil-gas condensation unit is used to separate the oil and water produced during the pyrolysis process; The exhaust gas purification unit is used to remove harmful gases that have not been completely reacted to ensure that the emissions meet the standards; The control unit is used to monitor the changes of various parameters in real time to ensure the coordinated operation of various links.

[0008] Preferably, the pre-treatment unit comprises a treatment body, a first rotating shaft, a conveying auger, a second rotating shaft, a shredding blade and a dewatering assembly; the first rotating shaft is rotatably connected to an internal position of the treatment body; a conveying auger is fixedly connected to the side wall of the first rotating shaft; the internal rotation of the treatment body is connected to two second rotating shafts arranged in parallel; a plurality of shredding blades are fixedly connected to the side wall of the second rotating shaft, and the shredding blades on the two side walls of the second rotating shafts are staggered; a cutting net is provided between the conveying auger and the shredding blades; the dewatering assembly comprises an extrusion roller; a water filter hole is provided on the bottom side wall of the treatment body, and the water filter hole is provided at a position corresponding to the bottom of the extrusion roller; a support frame is fixedly connected to the bottom of the treatment body; a collecting trough is slidably matched inside the support frame; a plurality of staggered material baffles are fixedly connected to the inside of the treatment body, and the material baffles are provided at a side position of the extrusion roller away from the second rotating shaft; a plurality of air inlet holes are provided on the side wall of the treatment body at a position corresponding to the material baffle; the material can be kept at an appropriate moisture content and particle size through the pre-treatment assembly.

[0009] Preferably, the pyrolysis reaction unit includes a pyrolysis reactor; a stirring assembly and a temperature control assembly are installed inside the pyrolysis reactor; the temperature control assembly includes a heating resistor and a temperature sensor; the pyrolysis reactor is made of corrosion-resistant stainless steel; the inner wall of the pyrolysis reactor is treated by sandblasting; the stirring assembly includes a driving source, a rotating shaft and a stirring blade; the driving source is driven by a variable frequency speed regulating motor; the speed range of the variable frequency speed regulating motor is between 50rpm-200rpm; the shape of the stirring blade can be selected from a propeller shape or a sawtooth shape; the material of the stirring blade is selected from corrosion-resistant stainless steel; the material of the stirring blade is selected from corrosion-resistant stainless steel to extend the service life.

[0010] Preferably, the heat exchange unit can be a plate heat exchanger or a shell and tube heat exchanger; temperature sensors are installed at the inlet and outlet of the heat exchange unit; temperature sensors are also installed at the inlet and outlet of the heat exchanger to monitor the inlet and outlet water temperature difference in real time to ensure heat recovery efficiency.

[0011] Preferably, the exhaust gas purification unit includes an activated carbon adsorption component and a catalytic oxidation component; the catalyst of the catalytic oxidation component can select a precious metal catalyst, such as platinum or palladium; the inlet and outlet of the exhaust gas purification unit are equipped with a flow meter and a pressure gauge; the inlet and outlet of the exhaust gas purification unit are also equipped with a flow meter and a pressure gauge to monitor the gas flow and pressure in real time to ensure the normal operation of the system.

[0012] Preferably, the oil and gas condensing unit can be a multi-stage tube condenser; the multi-stage tube condenser includes a heat exchanger shell, heat exchange tubes and baffles; the diameter of the heat exchange tubes is between 10mm and 25mm; the heat exchanger shell can be an aluminum alloy or a copper alloy; a plurality of baffles are fixedly connected to the inside of the heat exchange tubes, and the baffles are staggered inside the heat exchange tubes; a plurality of baffles are also arranged inside the condenser to increase the contact area between the oil and gas and the condensing medium and improve the condensation effect.

[0013] Preferably, the control unit controls the pyrolysis system by means of PLC automatic control; it can promptly issue an alarm under abnormal conditions to remind the operator to handle the situation; the control unit has a friendly human-machine interface and is easy to operate, so that the operator can quickly master it.

[0014] Preferably, a sludge and organic solid waste collaborative pyrolysis method is applicable to any of the above-mentioned sludge and organic solid waste collaborative pyrolysis systems, and the specific steps of the method are as follows: S1. Pretreatment: Put the waste materials to be treated into the pretreatment unit, pretreat the materials, and adjust the materials to suitable moisture and particle size; S2, pyrolysis reaction: the pretreated material is placed in a pyrolysis reactor, and the inside of the pyrolysis reactor is heated by a heating resistor to perform pyrolysis on the material. In this process, the material is decomposed under high temperature of 200-550°C and oxygen-deficient conditions to produce pyrolysis gas and pyrolysis slag; S3, waste heat recovery: collect pyrolysis gas and pyrolysis slag, then introduce the pyrolysis gas into the heat exchange unit to recover the waste heat in the pyrolysis gas; S4, purification treatment: The pyrolysis gas after waste heat recovery is introduced into the waste gas purification unit, and a large amount of harmful gases remaining in the pyrolysis gas are adsorbed by activated carbon, and then the remaining harmful gases are converted into harmless substances by catalytic oxidation; S5. Condensation treatment: The pyrolysis gas that has been purified is introduced into the oil and gas condensation unit to convert the water vapor and other condensable components in the exhaust gas into liquid, thereby completing the treatment of the pyrolysis gas.

[0015] The beneficial effects of the present invention are as follows: The sludge and organic solid waste collaborative pyrolysis system and method described in the present invention, by setting a feeding unit, a pretreatment unit, a pyrolysis reaction unit, a heat exchange unit, an oil and gas condensation unit, a waste gas purification unit and a control unit, each unit cooperates with each other, and a structural design for pyrolysis of sludge and organic solid waste is achieved, which effectively improves the waste treatment efficiency and reduces the floor space and operating costs. It effectively solves the problem that traditional single material pyrolysis technology is difficult to overcome the limitations of raw material characteristics, organic solid waste may contain more inert components, which will affect the quality of the final product, the cost of separate treatment is high, the economic benefits are not obvious, and it is difficult to promote and apply on a large scale. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below in conjunction with the accompanying drawings.

[0017] Figure 1 is a system flow chart of the collaborative pyrolysis system of the present invention; Figure 2 It is a partial structural schematic diagram of the pre-processing unit in the present invention; Figure 3 is a cross-sectional view of a processing body in the present invention; Figure 4 It is a partial structural schematic diagram of the heat exchange unit in the present invention; Figure 5 It is a process flow chart of the collaborative pyrolysis method of the present invention.

[0018] Description of reference numerals: 1. Pretreatment unit; 101. Treatment body; 102. First rotating shaft; 103. Conveying auger; 104. Second rotating shaft; 105. Shredding blade; 106. Cutting net; 107. Extrusion roller; 108. Water filter hole; 109. Support frame; 110. Collecting tank; 111. Material baffle; 112. Air inlet; 201. Heat exchanger housing; 202. Heat exchange tube; 203. Baffle. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0020] like Figures 1 to 5 As shown, a sludge and organic solid waste coordinated pyrolysis system according to an embodiment of the present invention comprises a pretreatment unit 1, a pyrolysis reaction unit, a heat exchange unit, an oil and gas condensation unit, an exhaust gas purification unit and a control unit; The pretreatment unit 1 is used to mix the sludge and organic solid waste evenly and adjust them to suitable moisture and particle size; The pyrolysis reaction unit can utilize thermochemical action to convert organic matter into bio-oil, char, synthesis gas and reaction water under anaerobic conditions, thereby pyrolyzing sludge and organic solid waste. The heat exchange unit is used to recover the heat of high-temperature flue gas and improve energy utilization; The oil-gas condensation unit is used to separate the oil and water produced during the pyrolysis process; The exhaust gas purification unit is used to remove harmful gases that have not been completely reacted to ensure that emissions meet standards; The control unit is used to monitor the changes of various parameters in real time to ensure the coordinated operation of all links.

[0021] The pre-processing unit 1 comprises a processing body 101, a first rotating shaft 102, a conveying auger 103, a second rotating shaft 104, a shredding blade 105 and a dehydration component; the first rotating shaft 102 is rotatably connected to an internal position of the processing body 101; a conveying auger 103 is fixedly connected to the side wall of the first rotating shaft 102; the processing body 101 is internally rotatably connected to two second rotating shafts 104 arranged in parallel; a plurality of shredding blades 105 are fixedly connected to the side wall of the second rotating shaft 104, and the shredding blades 105 on the side walls of the two second rotating shafts 104 are staggered; A cutting net 106 is provided; the dehydration assembly includes a squeezing roller 107; a water filter hole 108 is provided on the bottom side wall of the processing body 101, and the water filter hole 108 is arranged at a position corresponding to the bottom of the squeezing roller 107; a support frame 109 is fixedly connected to the bottom of the processing body 101; a collecting tank 110 is slidably matched inside the support frame 109; a plurality of staggered baffle plates 111 are fixedly connected inside the processing body 101, and the baffle plates 111 are arranged at a side position of the squeezing roller 107 away from the second rotating shaft 104; a plurality of air inlet holes 111 are provided on the side wall of the processing body 101 at a position corresponding to the baffle plates 111 12; During operation, the conveying auger 103 can select different pitch designs according to the viscosity of the material. For example, for sludge with high viscosity, a larger pitch can be selected to prevent clogging; and for granular organic solid waste, a smaller pitch can be selected to improve the conveying efficiency. The shredding blade 105 needs to be regularly replaced or repaired according to the wear condition to ensure its long-term stable operation. The material of the shredding blade 105 can be selected from high manganese steel or alloy steel to improve wear resistance and service life. In the process of cutting and crushing, the cutting net 106 can pre-cut the material. After the crushing is completed, the material enters the extruder. The bottom of the pressure roller 107 controls the rotation of the squeezing roller 107 to convey and squeeze the material, so that the moisture in the material can enter the interior of the collecting tank 110 through the water filter hole 108, and then hot air can be injected into the interior of the processing body 101 through the air inlet 112 to dry the material passing through the processing body 101. At the same time, a material baffle 111 is set inside the processing body 101 to reduce the moving speed of the material and make the material stay longer in the processing body 101, so as to achieve a better drying effect on the material. The material can be kept at an appropriate moisture and particle size through the pretreatment component.

[0022] The pyrolysis reaction unit includes a pyrolysis reactor; a stirring component and a temperature control component are installed inside the pyrolysis reactor; the temperature control component includes a heating resistor and a temperature sensor; the material of the pyrolysis reactor is corrosion-resistant stainless steel; the inner wall of the pyrolysis reactor is treated by sandblasting; the stirring component includes a driving source, a rotating shaft and a stirring blade; the driving source is driven by a variable frequency speed regulating motor; the speed range of the variable frequency speed regulating motor is between 50rpm-200rpm; the shape of the stirring blade can be selected from a propeller shape or a sawtooth shape; the material of the stirring blade is corrosion-resistant stainless steel; during operation, the temperature inside the pyrolysis reactor can be controlled by setting a temperature control component inside the pyrolysis reactor Control is carried out to ensure that the temperature inside the pyrolysis reactor is constant. At the same time, a temperature sensor is set to monitor the temperature of each area inside the pyrolysis reactor in real time to ensure that the material is heated evenly. At the same time, the power of the heating resistance wire can be adjusted according to actual needs to adapt to different types of materials and processing volumes. The inner wall of the pyrolysis reactor can be sandblasted to increase the surface roughness, thereby improving the heat transfer efficiency. A variable frequency speed regulation motor with a speed range of 50rpm to 200rpm is selected to adapt to the fluidity of different materials. The shape of the stirring blade is selected to be propeller-shaped or serrated to improve the stirring effect. The material of the stirring blade is selected to be corrosion-resistant stainless steel to extend the service life.

[0023] The heat exchange unit can be a plate heat exchanger or a shell and tube heat exchanger; temperature sensors are installed at the inlet and outlet of the heat exchange unit; when working, the heat exchange unit is used to recover the heat of high-temperature flue gas and improve energy utilization. The type of heat exchanger can be selected as a plate heat exchanger or a shell and tube heat exchanger. The former has a higher heat transfer efficiency, while the latter is more durable. The material of the heat exchanger can be selected as copper or aluminum to improve thermal conductivity. The inlet and outlet of the heat exchanger are also equipped with temperature sensors to monitor the inlet and outlet water temperature difference in real time to ensure heat recovery efficiency.

[0024] The exhaust gas purification unit includes an activated carbon adsorption component and a catalytic oxidation component; the catalyst of the catalytic oxidation component can select precious metal catalysts, such as platinum and palladium; the inlet and outlet of the exhaust gas purification unit are equipped with flow meters and pressure gauges; when working, the exhaust gas purification unit is mainly used to remove harmful gases that have not reacted completely to ensure that emissions meet the standards. The exhaust gas purification device can adopt a combination of activated carbon adsorption and catalytic oxidation. First, most of the harmful gases are adsorbed by activated carbon, and then the remaining harmful gases are converted into harmless substances through the catalyst. The catalyst can be a precious metal catalyst, such as platinum, palladium, etc., to improve the catalytic efficiency. The inlet and outlet of the exhaust gas purification unit are also equipped with flow meters and pressure gauges to monitor the gas flow and pressure in real time to ensure the normal operation of the system.

[0025] The oil and gas condensing unit can be a multi-stage tube condenser; the multi-stage tube condenser includes a heat exchanger shell 201, a heat exchange tube 202 and a baffle 203; the diameter of the heat exchange tube 202 is between 10mm and 25mm; the heat exchanger shell 201 can be an aluminum alloy or a copper alloy; a plurality of baffles 203 are fixedly connected to the inside of the heat exchange tube 202, and the baffles 203 are staggered inside the heat exchange tube 202; when working, the diameter of the heat exchange tube 202 can be selected according to the actual working conditions, generally between 10mm and 25mm, so as to balance the condensation efficiency and the pressure drop. The shell of the heat exchanger shell 201 can be selected from aluminum alloy or copper alloy to improve the thermal conductivity. A plurality of baffles 203 are also arranged inside the condenser to increase the contact area between the oil and gas and the condensation medium and improve the condensation effect.

[0026] The control unit uses PLC automatic control to control the pyrolysis system; when working, the control unit uses PLC automatic control to monitor the changes of various parameters in real time to ensure the coordinated operation of all links. The control unit can set multiple operating modes, such as manual mode, automatic mode and timing mode, to adapt to different working conditions. The control unit also has fault diagnosis and alarm functions, and can issue alarms in time under abnormal circumstances to remind operators to deal with them. The control unit has a friendly human-machine interface and is easy to operate, which is easy for operators to master quickly.

[0027] A sludge and organic solid waste collaborative pyrolysis method, the collaborative pyrolysis method is applicable to any of the above-mentioned sludge and organic solid waste collaborative pyrolysis systems, and the specific steps of the method are as follows: S1, pretreatment: putting the waste materials to be treated into the pretreatment unit 1, pretreating the materials and adjusting the materials to suitable moisture and particle size; S2, pyrolysis reaction: the pretreated material is placed in a pyrolysis reactor, and the inside of the pyrolysis reactor is heated by a heating resistor to perform pyrolysis on the material. In this process, the material is decomposed under high temperature of 200-550°C and oxygen-deficient conditions to produce pyrolysis gas and pyrolysis slag; S3, waste heat recovery: collect pyrolysis gas and pyrolysis slag, then introduce the pyrolysis gas into the heat exchange unit to recover the waste heat in the pyrolysis gas; S4, purification treatment: The pyrolysis gas after waste heat recovery is introduced into the waste gas purification unit, and a large amount of harmful gases remaining in the pyrolysis gas are adsorbed by activated carbon, and then the remaining harmful gases are converted into harmless substances by catalytic oxidation; S5. Condensation treatment: The pyrolysis gas that has been purified is introduced into the oil and gas condensation unit to convert the water vapor and other condensable components in the exhaust gas into liquid, thereby completing the treatment of the pyrolysis gas.

[0028] When working, the conveying auger 103 can select different pitch designs according to the viscosity of the material. For example, for sludge with higher viscosity, a larger pitch can be selected to prevent clogging; and for granular organic solid waste, a smaller pitch can be selected to improve the conveying efficiency. The shredding blade 105 needs to be replaced or repaired regularly according to the wear condition to ensure its long-term stable operation. The material of the shredding blade 105 can be selected from high manganese steel or alloy steel to improve wear resistance and service life. The dehydration component can dry and dehydrate the material, and the pretreatment component can keep the material at an appropriate moisture and particle size.

[0029] By setting a temperature control component inside the pyrolysis reactor, the temperature inside the pyrolysis reactor can be controlled to ensure that the temperature inside the pyrolysis reactor is constant. At the same time, a temperature sensor is set to monitor the temperature of each area inside the pyrolysis reactor in real time to ensure that the material is heated evenly. At the same time, the power of the heating resistance wire can be adjusted according to actual needs to adapt to different types of materials and processing volumes. The inner wall of the pyrolysis reactor can be sandblasted to increase the surface roughness, thereby improving the heat transfer efficiency. A variable frequency speed regulation motor with a speed range of 50rpm to 200rpm is selected to adapt to the fluidity of different materials. The shape of the stirring blade is selected to be propeller-shaped or serrated to improve the stirring effect. The material of the stirring blade is selected to be corrosion-resistant stainless steel to extend the service life.

[0030] The heat exchange unit is used to recover the heat of high-temperature flue gas and improve energy utilization. The type of heat exchanger can be selected as a plate heat exchanger or a shell and tube heat exchanger. The former has a higher heat transfer efficiency, while the latter is more durable. The material of the heat exchanger can be selected as copper or aluminum to improve thermal conductivity. The inlet and outlet of the heat exchanger are also equipped with temperature sensors to monitor the inlet and outlet water temperature difference in real time to ensure heat recovery efficiency.

[0031] The exhaust gas purification unit is mainly used to remove harmful gases that have not reacted completely to ensure that emissions meet standards. The exhaust gas purification device can adopt a combination of activated carbon adsorption and catalytic oxidation. First, most of the harmful gases are adsorbed by activated carbon, and then the remaining harmful gases are converted into harmless substances through the catalyst. The catalyst can be a precious metal catalyst, such as platinum, palladium, etc., to improve the catalytic efficiency. The inlet and outlet of the exhaust gas purification unit are also equipped with flow meters and pressure gauges to monitor the gas flow and pressure in real time to ensure the normal operation of the system.

[0032] The diameter of the heat exchange tube 202 can be selected according to the actual working conditions, generally between 10mm and 25mm, to balance the condensation efficiency and pressure drop. The shell of the heat exchanger shell 201 can be selected from aluminum alloy or copper alloy to improve thermal conductivity. A multi-layer baffle 203 is also provided inside the condenser to increase the contact area between the oil and gas and the condensing medium and improve the condensation effect.

[0033] The control unit adopts PLC automatic control to monitor the changes of various parameters in real time to ensure the coordinated operation of all links. The control unit can set multiple operating modes, such as manual mode, automatic mode and timing mode, to adapt to different working conditions. The control unit also has fault diagnosis and alarm functions, which can issue alarms in time under abnormal circumstances to remind operators to deal with them. The control unit has a friendly human-machine interface and is easy to operate, making it easy for operators to quickly master it.

[0034] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A sludge and organic solid waste collaborative pyrolysis system, characterized by: It includes a feed unit, a pretreatment unit (1), a pyrolysis reaction unit, a heat exchange unit, an oil and gas condensation unit, an exhaust gas purification unit and a control unit; The pretreatment unit (1) is used to mix the sludge and the organic solid waste evenly and adjust them to suitable moisture and particle size; The pyrolysis reaction unit can utilize thermochemical action to convert organic matter into bio-oil, char, synthesis gas and reaction water under anaerobic conditions, thereby pyrolyzing sludge and organic solid waste. The heat exchange unit is used to recover the heat of high-temperature flue gas; The oil-gas condensation unit is used to separate the oil and water produced during the pyrolysis process; The exhaust gas purification unit is used to remove harmful gases that have not completely reacted; The control unit is used to monitor the changes of various parameters in real time.

2. The sludge and organic solid waste collaborative pyrolysis system according to claim 1, characterized in that: The pre-treatment unit (1) comprises a treatment body (101), a first rotating shaft (102), a conveying auger (103), a second rotating shaft (104), a shredding blade (105) and a dehydration component; the first rotating shaft (102) is rotatably connected to an internal position of the treatment body (101); a conveying auger (103) is fixedly connected to the side wall of the first rotating shaft (102); two second rotating shafts (104) arranged in parallel are rotatably connected to the inside of the treatment body (101); a plurality of shredding blades (105) are fixedly connected to the side wall of the second rotating shaft (104), and the shredding blades (105) on the side walls of the two second rotating shafts (104) are arranged in a staggered manner; a shredding blade (105) is provided between the conveying auger (103) and the shredding blade (105). The invention relates to a cutting net (106); the dehydration component comprises a squeezing roller (107); a water filter hole (108) is provided on the bottom side wall of the processing body (101), and the water filter hole (108) is arranged at a position corresponding to the bottom of the squeezing roller (107); a support frame (109) is fixedly connected to the bottom of the processing body (101); a collecting trough (110) is slidably fitted inside the support frame (109); a plurality of staggered material baffle plates (111) are fixedly connected inside the processing body (101), and the material baffle plates (111) are arranged at a side position of the squeezing roller (107) away from the second rotating shaft (104); a plurality of air inlet holes (112) are provided on the side wall of the processing body (101) at a position corresponding to the material baffle plates (111).

3. The sludge and organic solid waste collaborative pyrolysis system according to claim 1, characterized in that: The pyrolysis reaction unit includes a pyrolysis reactor; a stirring component and a temperature control component are installed inside the pyrolysis reactor; the temperature control component includes a heating resistor and a temperature sensor; the pyrolysis reactor is made of corrosion-resistant stainless steel; the inner wall of the pyrolysis reactor is treated by sandblasting; the stirring component includes a driving source, a rotating shaft and a stirring blade; the driving source is driven by a variable frequency speed regulating motor; the speed range of the variable frequency speed regulating motor is between 50rpm-200rpm; the shape of the stirring blade can be selected from a propeller shape or a sawtooth shape; the material of the stirring blade is corrosion-resistant stainless steel.

4. The sludge and organic solid waste collaborative pyrolysis system according to claim 1, characterized in that: The heat exchange unit may be a plate heat exchanger or a shell and tube heat exchanger; a temperature sensor is installed at the inlet and outlet of the heat exchange unit.

5. The sludge and organic solid waste collaborative pyrolysis system according to claim 1, characterized in that: The exhaust gas purification unit includes an activated carbon adsorption component and a catalytic oxidation component; the catalyst of the catalytic oxidation component can be a precious metal catalyst, such as platinum and palladium; the inlet and outlet of the exhaust gas purification unit are equipped with a flow meter and a pressure gauge.

6. The sludge and organic solid waste collaborative pyrolysis system according to claim 1, characterized in that: The oil-gas condensing unit may be a multi-stage tube condenser; the multi-stage tube condenser comprises a heat exchanger shell (201), a heat exchange tube (202) and a baffle (203); the diameter of the heat exchange tube (202) is between 10 mm and 25 mm; the heat exchanger shell (201) may be an aluminum alloy or a copper alloy; a plurality of baffles (203) are fixedly connected to the interior of the heat exchange tube (202), and the baffles (203) are arranged in a staggered manner inside the heat exchange tube (202).

7. The sludge and organic solid waste collaborative pyrolysis system according to claim 1, characterized in that: The control unit controls the pyrolysis system in a PLC automatic control manner.

8. A method for synergistic pyrolysis of sludge and organic solid waste, characterized in that: The synergistic pyrolysis method is applicable to a sludge and organic solid waste synergistic pyrolysis system according to any one of claims 1 to 7, and the specific steps of the method are as follows: S1. Pretreatment: The waste materials to be treated are placed in the pretreatment unit (1), the materials are pretreated, and the materials are adjusted to a suitable moisture content and particle size; S2, pyrolysis reaction: the pretreated material is placed in a pyrolysis reactor, and the inside of the pyrolysis reactor is heated by a heating resistor to perform pyrolysis on the material. In this process, the material is decomposed under high temperature of 200-550°C and oxygen-deficient conditions to produce pyrolysis gas and pyrolysis slag; S3, waste heat recovery: collect pyrolysis gas and pyrolysis slag, then introduce the pyrolysis gas into the heat exchange unit to recover the waste heat in the pyrolysis gas; S4, purification treatment: The pyrolysis gas after waste heat recovery is introduced into the waste gas purification unit, and a large amount of harmful gases remaining in the pyrolysis gas are adsorbed by activated carbon, and then the remaining harmful gases are converted into harmless substances by catalytic oxidation; S5. Condensation treatment: The pyrolysis gas that has been purified is introduced into the oil and gas condensation unit to convert the water vapor and other condensable components in the exhaust gas into liquid, thereby completing the treatment of the pyrolysis gas.

Images