Innocent treatment system and method for combustible solid waste in production process of medical supplies

Abstract

The invention discloses a harmless treatment system and method for combustible solid waste in the production process of medical supplies in the technical field of solid waste treatment, and the harmless treatment system comprises a storage module which is used for collecting solid waste generated in the production process of the medical supplies; the solid waste pretreatment module is used for pretreating the collected solid waste; the solid waste heat cracking module is used for carrying out cracking gasification treatment on the solid waste under high-temperature and anaerobic conditions and circularly combusting a gasified product to generate secondary tail gas; the secondary tail gas treatment module is used for purifying the generated secondary tail gas; and the recovery module is used for recovering coke mud and ash generated after pyrolysis of the solid waste heat for reutilization. The device is novel and efficient, combustible solid waste is generated in the production process of medical supplies through pyrolysis gasification, possible carried pathogens are killed, the treatment time of tail gas is prolonged by refining the secondary tail gas treatment process and using a sieve plate and a wall spring, and the tail gas purification effect and the harmless treatment efficiency are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of solid waste treatment, and specifically relates to a system and method for harmlessly treating combustible solid waste in a medical supplies production process. Background Art

[0002] The combustible solid waste generated in the production process of medical supplies mainly includes discarded raw materials, scraps, packaging materials and other combustible wastes in the production process. If these wastes are not handled properly, they will not only pollute the environment, but may also become the source of disease transmission. Therefore, it is crucial to adopt an effective harmless treatment system and method. The harmless treatment system for combustible solid waste usually includes several links such as waste collection, temporary storage, pretreatment, thermal cracking, flue gas purification and ash treatment. Among them, the thermal cracking link is the key. The harmful substances in the waste can be completely decomposed through high temperature, while reducing the volume and weight of the waste. The flue gas purification link is responsible for removing harmful gases and particulate matter generated during the thermal cracking process to ensure that the emitted flue gas meets national environmental protection standards.

[0003] Existing flue gas purification technologies mainly include wet, semi-dry and dry methods. Among them, wet purification technology absorbs harmful gases in flue gas by spraying alkaline solution or slurry; semi-dry purification technology combines the advantages of wet and dry methods, and removes harmful gases by spraying absorbents and reacting in reactors; dry purification technology mainly removes harmful gases and particulate matter in flue gas by spraying absorbents or catalysts. These methods each have their own advantages and disadvantages, but they all treat harmful substances in exhaust gas in a general way, making it difficult to achieve the best harmful substance treatment efficiency. For this reason, it is necessary to propose a system and method for harmless treatment of combustible solid waste in the production process of medical supplies that can refine the secondary exhaust gas purification process, give full play to the purification efficiency of harmful substances, and improve the secondary exhaust gas treatment effect in the solid waste treatment process. Summary of the invention

[0004] In order to solve the above problems, the purpose of the present invention is to provide a system and method for harmless treatment of combustible solid waste in the production process of medical supplies, which can gasify the combustible solid waste in the production process of medical supplies and kill the pathogens that may be carried, and improve the exhaust gas purification effect and harmless treatment efficiency by refining the secondary exhaust gas treatment process and using sieve plates and wall springs to extend the exhaust gas treatment time.

[0005] In order to achieve the above-mentioned purpose, the technical scheme of the present invention is as follows: a harmless treatment system for combustible solid waste in the production process of medical supplies, comprising a storage module, a solid waste pretreatment module, a solid waste thermal cracking module, a secondary tail gas treatment module and a recovery module.

[0006] The storage module is used to collect solid waste generated during the production of medical supplies and seal the collected solid waste for harmless treatment;

[0007] Solid waste pre-processing module, used for pre-processing operations of crushing and classifying collected solid waste;

[0008] The solid waste thermal cracking module is used to crack and gasify solid waste under high temperature and oxygen-free conditions, converting organic high-molecular compounds in solid waste into gaseous low-molecular compounds (such as alkanes, carbon monoxide, carbon dioxide, etc.), oil-phase liquid products and carbon ash substances, and circulating the gaseous low-molecular compounds for heat generation to produce secondary tail gas;

[0009] The secondary tail gas treatment module is used to purify the secondary tail gas generated during the thermal cracking of solid waste to reduce the content of harmful substances in compliance with environmental emission standards;

[0010] The recovery module is used to recover the coke mud and ash produced after thermal cracking of solid waste for reuse.

[0011] The principle of the basic scheme is to use the high temperature and oxygen-free conditions of the thermal cracking process to convert organic high molecular compounds in solid waste into gaseous low molecular compounds and carbon ash substances. Pathogens in the waste are also killed by high temperature, achieving harmless treatment. The sieve plate and wall spring structure extend the treatment time of the exhaust gas and perform fine treatment. The sieve plate separates particulate matter, and the wall spring increases the contact area and time between the exhaust gas and the purification medium, promoting the removal of harmful substances.

[0012] The beneficial effects of the basic scheme are: 1. Through thermal cracking and gasification technology, the combustible solid waste in the production process of medical supplies can be quickly converted into gaseous low-molecular compounds (such as alkanes, carbon monoxide, carbon dioxide, etc.), oil-phase liquid products and carbon ash substances. This process not only effectively reduces the volume and weight of waste, but also kills pathogens that may be carried in it and achieves harmless treatment. At the same time, the gaseous products produced by cracking have a high calorific value and can be used as energy resources.

[0013] 2. The secondary exhaust gas treatment module performs a more detailed purification of particulate matter and harmful gases in the exhaust gas, thereby promoting the adsorption and decomposition of harmful substances. This design not only improves the exhaust gas purification efficiency, but also ensures that the exhaust gas meets national environmental protection standards and reduces environmental pollution.

[0014] 3. The thermal cracking gasification technology and secondary tail gas treatment technology used in this system have a high degree of automation, reducing the reliance on manual operation and reducing operating costs. At the same time, the gaseous products and carbon ash substances produced by cracking can be used as resources, which can further reduce the processing cost.

[0015] 4. The treatment system and method of the present invention not only achieves harmless treatment of combustible solid waste in the production process of medical supplies, but also realizes environmentally friendly production through resource utilization and reduction of pollutant emissions. This is of great significance for promoting the green development of the medical supplies production industry and improving the overall environmental protection level of the industry.

[0016] Furthermore, the solid waste thermal cracking module includes a pyrolysis furnace capable of controlling temperature, gas pressure and oxygen content; the recovery module includes a sludge air-dried briquetting recovery device and a renewable organic matter sorting and packaging device.

[0017] The beneficial effects of the basic solution are: 1. Through precise control of temperature, air pressure and oxygen content, and the use of advanced cracking equipment and processes, the solid waste thermal cracking module can significantly improve cracking efficiency and product quality. This helps to achieve efficient and harmless treatment of solid waste, while improving resource utilization.

[0018] 2. The installation of safety equipment such as fire-blocking devices, flue gas cooling devices, and positive and negative pressure fans ensures the safety and stability of the cracking process. This helps prevent safety accidents such as fire and explosion, and ensures the safety of personnel and equipment.

[0019] 3. Through the installation of tar recovery device, sludge air-dried briquetting recovery device and renewable organic matter sorting and packaging device, the solid waste thermal cracking module can realize the resource utilization of cracking products. This helps to reduce resource waste and improve economic and social benefits.

[0020] 4. The use of advanced cracking equipment and processes, as well as the resource utilization of cracking products, can help reduce operating costs. At the same time, by improving cracking efficiency and product quality, it can further reduce processing costs and improve economic benefits.

[0021] Furthermore, the secondary exhaust gas treatment module includes a secondary exhaust gas treatment device, and the secondary exhaust gas treatment device is used for dust removal, desulfurization and denitrification treatment of the secondary exhaust gas.

[0022] The beneficial effects of the basic solution are: 1. The efficient dust removal effect helps to protect the normal operation of subsequent desulfurization and denitrification equipment, avoid equipment blockage or damage due to particulate matter deposition, and extend the service life of the overall system.

[0023] 2. Deep desulfurization not only helps to improve air quality and reduce acidic substances in exhaust gas, but also protects water bodies and soil from acid rain erosion and maintains ecological balance.

[0024] 3. Efficient denitrification helps improve air quality, reduce harmful substances in exhaust gas, and reduce potential threats to human health. Denitrification products such as ammonium sulfate also have the potential for resource utilization, providing fertilizer raw materials for agriculture and other fields.

[0025] 4. The secondary tail gas treatment module can significantly improve the overall environmental performance of the harmless treatment system of combustible solid waste in the production process of medical supplies through dust removal, desulfurization and denitrification, ensuring that tail gas emissions meet national environmental protection standards and even meet more stringent emission standards. The by-products such as desulfurization and denitrification products in the secondary tail gas treatment module have extensive resource utilization potential. Through technological innovation and industrial upgrading, these by-products can be converted into high-value-added environmentally friendly products or building materials, etc., to achieve resource recycling and sustainable economic development.

[0026] Furthermore, the secondary exhaust gas treatment device includes a treatment tank, and an air inlet pipe and an air outlet pipe are connected on both sides of the top of the treatment tank. The air inlet pipe is connected to the solid waste thermal cracking module, and a negative pressure fan is connected between the treatment tank and the air outlet pipe. A first sieve plate and a second sieve plate are vertically provided on the inner wall of the treatment tank. The first sieve plate and the second sieve plate divide the inside of the treatment tank from the air inlet pipe to the air outlet pipe into a dust removal chamber, a desulfurization chamber and a denitrification chamber. A plurality of wall springs are fixedly connected between the outer periphery of the first sieve plate and the second sieve plate and the inner wall of the treatment tank. A telescopic rod is fixedly connected between the side of the first sieve plate close to the dust removal chamber and the inner wall of the air inlet pipe, and a turbofan is rotatably sleeved on the telescopic rod. The desulfurization chamber is connected to a desulfurization circulating spray assembly for circulating spraying of an alkaline solution, and the denitrification chamber is connected to a denitrification circulating spray assembly for circulating spraying of a nitrate reducing agent.

[0027] The beneficial effects of the basic scheme are: 1. The air intake pipe is connected to the flue gas cooling system and the positive and negative pressure fans in the solid waste thermal cracking module to ensure that the exhaust gas has been initially cooled before entering the treatment tank, which is conducive to the subsequent dust removal, desulfurization and denitrification treatment. The first sieve plate and the second sieve plate arranged in the treatment tank, and the wall springs fixedly connected between them and the inner wall of the treatment tank, together constitute an efficient dust removal system. When the exhaust gas passes through the sieve plate, the particulate matter is filtered by the sieve plate and vibrated by the wall spring, effectively separated and deposited in the dust removal chamber, achieving the initial purification of the exhaust gas. The turbine fan fixedly connected to the telescopic rod further enhances the dust removal effect. When the exhaust gas enters the treatment tank through the air intake pipe, the turbine fan is driven to rotate by the airflow, generating sliding to push the sieve plate to vibrate more strongly, so that the particulate matter in the exhaust gas is more fully in contact with the sieve plate, and the particles retained on the sieve plate fall off, thereby improving the dust removal efficiency.

[0028] 2. The desulfurization circulation spraying assembly connected to the desulfurization chamber adopts the method of circulating spraying alkaline solution to effectively remove sulfur dioxide in the tail gas and generate harmless substances such as sulfate, thus realizing the deep desulfurization of the tail gas. The design of circulating spraying not only improves the desulfurization efficiency, but also saves water resources. After being treated, the alkaline solution after spraying can be reused in the desulfurization cycle, which reduces wastewater discharge and environmental pollution.

[0029] 3. The denitrification circulation spray assembly connected to the denitrification chamber utilizes a nitrate reducing agent to chemically react with nitrogen oxides in the exhaust gas to reduce them to nitrogen and water, thereby achieving efficient denitrification of the exhaust gas.

[0030] 4. The inlet and outlet pipes connected on both sides of the top of the treatment tank, as well as the first sieve plate, second sieve plate, wall spring and telescopic rod and other components set inside the treatment tank, together constitute a compact and stable secondary exhaust gas treatment system. The various components of the system are tightly connected, without leakage risk, ensuring the continuity and stability of exhaust gas treatment. At the same time, the materials and sizes of each component are carefully designed to ensure the durability and reliability of the system.

[0031] Furthermore, the desulfurization circulation spray assembly includes a liquid collecting pipe, which is connected to the bottom wall of the desulfurization chamber, and the end of the liquid collecting pipe away from the desulfurization chamber is connected to a desulfurization circulation pump, and the end of the desulfurization circulation pump away from the liquid collecting pipe is connected to a liquid supply pipe. A desulfurization reversing valve is connected between the desulfurization circulation pump and the liquid supply pipe, and the desulfurization reversing valve is also connected to a desulfurization liquid inlet pipe. A plurality of spray ports are opened on the top of the desulfurization chamber, and the spray ports are all connected to the liquid supply pipe. A rotating shaft is provided in the desulfurization chamber, and its two ends are respectively rotatably connected to the first sieve plate and the second sieve plate, and a plurality of fan blades are fixedly connected to the rotating shaft along its circumference.

[0032] The beneficial effects of the basic scheme are: 1. The liquid collecting pipe is connected to the bottom wall of the desulfurization chamber to ensure that the desulfurization liquid can be fully collected and recycled. The desulfurization circulation pump transports the desulfurization liquid to the spray port through the liquid supply pipe, forming a continuous spray cycle, which effectively improves the desulfurization efficiency. The introduction of the desulfurization reversing valve allows the desulfurization liquid to be flexibly switched between the desulfurization liquid inlet pipe and the liquid supply pipe, realizing the circulation renewal and replenishment of the desulfurization liquid, and avoiding the problem of reduced efficiency of the desulfurization liquid due to long-term use.

[0033] 2. The several spray ports opened on the top of the desulfurization chamber are connected to the top of the liquid supply pipe, ensuring that the desulfurization liquid can be evenly sprayed in the desulfurization chamber and fully contact with the tail gas, thereby improving the desulfurization effect. The number and position of the spray ports have been carefully designed to ensure that the desulfurization liquid can cover the entire desulfurization chamber and avoid the problem of insufficient local desulfurization.

[0034] 3. The design of the rotating shaft and fan blades that are rotatably connected between the center of the first sieve plate and the second sieve plate in the desulfurization chamber cleverly utilizes the power of the tail gas flow, so that the fan blades rotate under the action of the tail gas, further promoting the mixing and contact between the tail gas and the desulfurization liquid. The rotation of the fan blades not only enhances the disturbance effect of the desulfurization liquid on the tail gas, but also improves the mass transfer efficiency between the desulfurization liquid and the tail gas, thereby accelerating the desulfurization reaction rate.

[0035] Furthermore, the denitrification circulation spray assembly includes a circulation pipe, which is connected to the bottom wall of the denitrification chamber, and the end of the circulation pipe away from the denitrification chamber is connected to a denitrification circulation pump, and the end of the denitrification circulation pump away from the circulation pipe is connected to an atomization pipe, a denitrification reversing valve is connected between the denitrification circulation pump and the atomization pipe, and the denitrification reversing valve is also connected to a denitrification liquid inlet pipe, and a plurality of atomizers are connected to the top of the desulfurization chamber, and the atomizers are all connected to the atomization pipe; an axial spring is provided in the denitrification chamber, and the two ends of the axial spring are respectively fixedly connected to the second sieve plate and the inner wall of the denitrification chamber, and the axial spring is circumferentially fixedly connected to a plurality of liquid separators.

[0036] The beneficial effects of the basic scheme are: 1. The circulation pipe is connected to the bottom wall of the denitrification chamber to ensure that the denitrification liquid can be fully collected and recycled, reducing operating costs and reducing wastewater discharge, meeting environmental protection requirements. The denitrification circulation pump transports the denitrification liquid to the atomizer through the atomization pipe to form fine droplets, increasing the contact area between the denitrification liquid and the exhaust gas and improving the denitrification efficiency.

[0037] 2. Several atomizers connected to the top of the desulfurization chamber are connected to the top of the atomization pipe, ensuring that the denitrification liquid can be evenly atomized and sprayed in the denitrification chamber, fully mixed with the tail gas, thereby improving the denitrification effect. The design and layout of the atomizer have been carefully calculated to ensure that the denitrification liquid can cover the entire denitrification chamber, avoiding the problem of insufficient local denitrification.

[0038] 3. The introduction of the denitration reversing valve allows the denitration liquid to be flexibly switched between the denitration liquid inlet pipe and the atomization pipe, realizing the circulation and replenishment of the denitration liquid, avoiding the problem of reduced efficiency of the denitration liquid due to long-term use. By accurately controlling the spraying amount and spraying time of the denitration liquid, the denitration effect can be further optimized while reducing unnecessary energy consumption.

[0039] 4. The design of the shaft spring and liquid separator plate, which are fixedly connected between the second sieve plate in the denitrification chamber and the inner wall of the denitrification chamber, cleverly utilizes the power of the exhaust gas flow, so that the liquid separator plate vibrates under the action of the exhaust gas, further promoting the mixing and contact between the exhaust gas and the denitrification liquid. The vibration of the liquid separator plate not only enhances the disturbing effect of the denitrification liquid on the exhaust gas, but also improves the mass transfer efficiency between the denitrification liquid and the exhaust gas, thereby accelerating the reduction rate of nitrogen oxides.

[0040] Furthermore, adsorption layers are laid inside the first sieve plate and the second sieve plate, and the adsorption layers are made of active adsorption materials.

[0041] The beneficial effects of the basic solution are: 1. The adsorption layer is made of active adsorption materials, which have extremely strong adsorption capacity and can effectively adsorb harmful substances in the exhaust gas, such as particulate matter, sulfur dioxide, nitrogen oxides and other harmful gases. Through adsorption, pollutants in the exhaust gas are firmly adsorbed on the adsorption layer inside the sieve plate, thereby achieving deep purification of the exhaust gas.

[0042] 2. The existence of the adsorption layer makes the tail gas treatment process more efficient. When the tail gas passes through the sieve plate, it is first adsorbed and purified by the adsorption layer, and then enters the subsequent desulfurization, denitrification and other treatment links. This design optimizes the tail gas treatment process and improves the overall treatment efficiency.

[0043] 3. Since the adsorption layer can effectively absorb harmful substances in the tail gas, the use of chemical agents such as desulfurization and denitrification in the subsequent treatment process can be reduced. This not only reduces the operating cost, but also reduces the discharge of pollutants such as wastewater and waste residue, which meets environmental protection requirements.

[0044] Furthermore, a hydrophobic filter membrane is laid between the processing tank and the negative pressure fan.

[0045] The beneficial effects of the basic solution are: 1. The hydrophobic filter membrane has unique hydrophobic properties, which can effectively filter out moisture in the exhaust gas to prevent moisture from causing adverse effects on subsequent equipment. Especially when dealing with exhaust gas containing a large amount of water vapor, the role of the hydrophobic filter membrane is particularly significant, ensuring that the exhaust gas has been fully dried before entering the negative pressure fan.

[0046] 2. By laying a hydrophobic filter membrane, the moisture and oil in the exhaust gas are effectively removed, so that the various solutions used in the secondary exhaust gas treatment process will not leak with the exhaust gas. This not only improves the safety of exhaust emissions, but also reduces treatment costs because it reduces the consumption of additional chemicals and energy.

[0047] Furthermore, the wall springs are fixedly connected with elastic sealing rings which are fixedly connected to the inner wall of the processing tank, and the inner peripheries of the elastic sealing rings are fixedly connected to the outer edges of the first sieve plate and the second sieve plate respectively.

[0048] The beneficial effect of the basic solution is that the design and use of the sealing ring significantly enhances the sealing performance between the first and second sieve plates in the treatment tank and the tank wall. By ensuring close contact between the sieve plates and the tank wall, the sealing ring can effectively prevent the leakage of exhaust gas or other treatment media during the treatment process, thereby ensuring the overall sealing and efficiency of the exhaust gas treatment system.

[0049] Furthermore, a method for harmlessly treating combustible solid waste in the production process of medical supplies comprises the following steps:

[0050] Step 1: solid waste transfer and concentration: transfer of solid waste from the production process of medical supplies and concentration in the storage module. The transfer process ensures the sealing and safety of the waste;

[0051] Step 2: solid waste pretreatment: use the solid waste pretreatment module to perform pretreatment operations such as solid waste crushing and classification. During the pretreatment process, attention should also be paid to the safety and stability of the solid waste;

[0052] Step 3: solid waste thermal cracking, using a solid waste thermal cracking module to thermally crack solid waste under high temperature and oxygen-free conditions, converting organic high-molecular compounds into gaseous low-molecular compounds, oil-phase liquid products and carbon ash, circulating the gaseous low-molecular compounds for heat generation to produce secondary tail gas, and killing pathogens and harmful microorganisms that may be attached therein;

[0053] Step 4: secondary tail gas treatment, using a secondary tail gas treatment device to purify the flue gas generated during the solid waste thermal cracking process, including dust removal, desulfurization and denitrification treatment processes, so that the secondary tail gas meets environmental emission standards;

[0054] Step five, solid waste recycling, use the recovery module to recover and package the coke mud and ash remaining after thermal cracking for reuse. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 Schematic diagram of a system and method for harmless treatment of combustible solid waste in the production process of medical supplies in an embodiment of the present invention.

[0056] Figure 2 1 is an axonometric diagram of a secondary exhaust gas treatment module in an embodiment of the present invention.

[0057] Figure 3 It is a side cross-sectional view of the secondary exhaust gas treatment module in an embodiment of the present invention.

[0058] The figure marks in the drawings of the specification include: 1. treatment tank; 2. liquid collecting pipe; 3. fan blade; 4. circulation pipe; 5. liquid separation plate; 6. shaft spring; 7. hydrophobic filter membrane; 8. exhaust pipe; 9. negative pressure fan; 10. atomizer; 11. atomizing pipe; 12. second sieve plate; 13. spray port; 14. liquid supply pipe; 15. rotating shaft; 16. wall spring; 17. first sieve plate; 18. air inlet pipe; 19. telescopic rod; 20. turbofan; 21. adsorption layer; 22. elastic sealing ring; 23. desulfurization circulation pump; 24. denitrification circulation pump; 25. desulfurization reversing valve; 26. desulfurization liquid inlet pipe; 27. denitrification reversing valve; 28. denitrification liquid inlet pipe. DETAILED DESCRIPTION

[0059] The following is further described in detail through specific implementation methods:

[0060] Example 1

[0061] Basically as attached Figure 1 As shown: A harmless treatment system for combustible solid waste in the production process of medical supplies, including a storage module, a solid waste pretreatment module, a solid waste thermal cracking module, a secondary tail gas treatment module and a recovery module.

[0062] The storage module is used to collect solid waste generated during the production of medical supplies and seal the collected solid waste for harmless treatment;

[0063] Solid waste pre-processing module, used for pre-processing operations of crushing and classifying collected solid waste;

[0064] The solid waste thermal cracking module is used to perform cracking and gasification treatment on solid waste under high temperature and oxygen-free conditions, converting organic high-molecular compounds in solid waste into gaseous low-molecular compounds, oil-phase liquid products and carbon ash substances, and circulating the gaseous low-molecular compounds for combustion and heat generation to produce secondary tail gas. The solid waste thermal cracking module includes at least one pyrolysis furnace capable of controlling temperature, air pressure and oxygen content, and at least one flame arrester, flue gas circulation combustion device, flue gas cooling device, oil and gas separation device, tar recovery device, positive and negative pressure fans. The recovery module includes a sludge air-dried briquetting recovery device and a renewable organic matter sorting and packaging device;

[0065] The secondary tail gas treatment module is used to purify the secondary tail gas generated during the solid waste thermal cracking process to reduce the content of harmful substances in accordance with environmental emission standards. The secondary tail gas treatment module includes a secondary tail gas treatment device, which is used for dust removal, desulfurization and denitrification of the secondary tail gas;

[0066] The recovery module is used to recover the coke mud and ash produced after thermal cracking of solid waste for reuse.

[0067] The specific implementation process is as follows: First, the combustible solid waste from the production process of medical supplies is collected from the source to ensure that it will not be scattered or cause environmental pollution, and then concentrated in the reserve module for storage, waiting for the next step of processing.

[0068] The solid waste pretreatment module classifies the combustible solid waste in detail according to its type and nature, and excludes unstable and unsafe solid waste. It also crushes the combustible solid waste to a moderate particle size for subsequent incineration or pyrolysis. At the same time, it removes large impurities or non-combustible substances through screening. It reduces the moisture content of the combustible solid waste to improve the incineration efficiency, reduce the moisture content in the flue gas, and reduce the difficulty of subsequent flue gas treatment.

[0069] The solid waste is thermally cracked in the pyrolysis furnace in the solid waste thermal cracking module, and the solid waste is cracked and gasified under high temperature and anaerobic conditions to convert the organic high molecular compounds in the solid waste into gaseous low molecular compounds (such as alkanes, carbon monoxide, carbon dioxide, etc.) and charcoal ash substances. The pathogens in the waste are also killed by high temperature to achieve harmless treatment.

[0070] The flue gas produced by thermal cracking contains a variety of pollutants, such as particulate matter, sulfur dioxide, nitrogen oxides, etc. Many of these compounds can be burned again, so the solid waste cracking module circulates the low-molecular compounds in the gas produced to provide thermal cracking heat, save energy, and reduce the content of harmful substances in the exhaust gas. The gas after combustion is called secondary exhaust gas. The energy contained in the secondary exhaust gas is reduced, but there are still many harmful substances. Therefore, it is necessary to use the secondary exhaust gas treatment module to purify the flue gas by dust removal, desulfurization and denitrification to remove harmful substances and ensure that the emission meets the standards.

[0071] The recycling module uses a sludge air-dried briquetting recovery device and a renewable organic matter sorting and packaging device to recover and package the metal elements and other recyclable materials contained in the ash for comprehensive utilization. Unusable ash needs to be safely disposed of, such as landfill or sent to a professional treatment agency for treatment.

[0072] Example 2

[0073] The difference from the above embodiment is that, as shown in the attached Figure 2 , Figure 3 As shown: the secondary tail gas treatment device includes a treatment tank 1, the top of the treatment tank 1 is connected with an air inlet pipe 18 and an air outlet pipe 8 on both sides, the air inlet pipe 18 is connected to the solid waste thermal cracking module, the treatment tank 1 and the air outlet pipe 8 are connected with a negative pressure fan 9, a hydrophobic filter membrane 7 is laid between the treatment tank 1 and the negative pressure fan 9, the inner wall of the treatment tank 1 is vertically provided with a first sieve plate 17 and a second sieve plate 12, the first sieve plate 17 and the second sieve plate 12 separate the treatment tank 1 from left to right into a dust removal chamber, a desulfurization chamber and a denitrification chamber, the first sieve plate 17 and the second sieve plate 12 are both laid with an adsorption layer 21, the adsorption layer 21 is made of an active adsorption material, and the first sieve plate A plurality of wall springs 16 are fixedly connected between the outer peripheries of the first and second sieve plates 17 and 12 and the inner wall of the treatment tank 1, and elastic sealing rings 22 are fixedly connected to the wall springs 16 and are fixedly connected to the inner wall of the treatment tank 1. The inner peripheries of the elastic sealing rings 22 are respectively fixedly connected to the outer edges of the first sieve plate 17 and the second sieve plate 12, and a telescopic rod 19 is fixedly connected between the side of the first sieve plate 17 close to the dust removal chamber and the inner wall of the air inlet pipe 18, and a turbofan 20 is rotatably sleeved on the telescopic rod 19. The desulfurization chamber is connected to a desulfurization circulating spray assembly for circulating spraying of an alkaline solution, and the denitrification chamber is connected to a denitrification circulating spray assembly for circulating spraying of a nitrate reducing agent.

[0074] The desulfurization circulation spray assembly includes a collecting pipe 2, which is connected to the bottom wall of the desulfurization chamber. The end of the collecting pipe 2 away from the desulfurization chamber is connected to a desulfurization circulation pump 23, and the end of the desulfurization circulation pump 23 away from the collecting pipe 2 is connected to a liquid supply pipe 14. A desulfurization reversing valve 25 is connected between the desulfurization circulation pump 23 and the liquid supply pipe 14. The desulfurization reversing valve 25 is also connected to a desulfurization liquid inlet pipe 26. A plurality of spray ports 13 are opened on the top of the desulfurization chamber, and the spray ports 13 are all connected to the liquid supply pipe 14; a rotating shaft 15 with two ends rotatably connected to the first sieve plate 17 and the second sieve plate 12 is provided between the center of the first sieve plate 17 and the second sieve plate 12 in the desulfurization chamber, and a plurality of fan blades 3 are fixedly connected to the rotating shaft 15 along its circumference.

[0075] The denitrification circulation spray assembly includes a circulation pipe 4, which is connected to the bottom wall of the denitrification chamber. The end of the circulation pipe 4 away from the denitrification chamber is connected to a denitrification circulation pump 24, and the end of the denitrification circulation pump 24 away from the circulation pipe 4 is connected to an atomization pipe 11. A denitrification reversing valve 27 is connected between the denitrification circulation pump 24 and the atomization pipe 11. The denitrification reversing valve 27 is also connected to a denitrification liquid inlet pipe 28. A plurality of atomizers 10 are connected to the top of the desulfurization chamber, and the atomizers 10 are all connected to the atomization pipe 11. An axial spring 6 is provided in the denitrification chamber, and both ends of the axial spring 6 are respectively fixedly connected to the second sieve plate 12 and the inner wall of the denitrification chamber, and the axial spring 6 is circumferentially fixedly connected to a plurality of liquid separation plates 5.

[0076] The specific implementation process is as follows: when the secondary exhaust gas generated by the solid waste thermal cracking process is cooled by the flue gas cooling system and blown into the treatment tank 1 through the air inlet pipe 18 by the positive and negative pressure fans 9, the exhaust gas drives the turbine fan 20 on the telescopic rod 19 to rotate. The rotation of the turbine fan 20 not only makes the exhaust gas quickly fill the treatment tank 1, but also generates thrust to push the telescopic rod 19 to extend, pushing the wall spring 16 on the edge of the first sieve plate 17 to extend, and the first sieve plate 17 vibrates continuously. When the exhaust gas passes through the first sieve plate 17, the solid particles therein are filtered by the sieve plate, and the harmful gases in the exhaust gas are adsorbed by the adsorption layer 21, and are initially dust-removed. At this time, due to the continuous vibration of the first sieve plate 17, the solid particles accumulated on the sieve plate will be shaken off into the dust removal chamber to avoid affecting the subsequent desulfurization and denitrification treatment.

[0077] The tail gas passing through the first sieve plate 17 enters the desulfurization chamber, and alkaline liquid is first injected into the desulfurization chamber through the desulfurization liquid inlet pipe 26 and the desulfurization reversing valve 25. The alkaline liquid is evenly sprayed on the tail gas in the desulfurization chamber through multiple spray ports 13. The alkaline liquid reacts with sulfur dioxide in the tail gas to generate harmless sulfate, thereby harmlessly rendering the tail gas harmless. At this time, the tail gas drives multiple fan blades 3 and the rotating shaft 15 to rotate through the desulfurization chamber, thereby increasing the contact efficiency between the alkaline liquid and the tail gas and improving the spraying desulfurization efficiency of the tail gas. In addition, the rotating shaft 15 can transmit the vibration of the first sieve plate 17 to the second sieve plate 12, thereby improving the filtering effect of the second sieve plate 12. The alkaline liquid falling on the bottom wall of the desulfurization chamber after spraying is concentrated in the collecting pipe 2 and pumped back to the liquid supply pipe 14 by the desulfurization circulation pump 23 for circulating spraying. The introduction of the desulfurization reversing valve allows the desulfurization liquid to be flexibly switched between the desulfurization liquid inlet pipe and the liquid supply pipe, realizing the circulation, renewal and replenishment of the desulfurization liquid, and avoiding the problem of reduced efficiency of the desulfurization liquid due to long-term use; the rotation of the fan blades not only enhances the disturbing effect of the desulfurization liquid on the exhaust gas, but also improves the mass transfer efficiency between the desulfurization liquid and the exhaust gas, thereby accelerating the desulfurization reaction rate.

[0078] The tail gas passing through the second sieve plate 12 enters the denitrification chamber, and the nitrate reducing agent is also injected into the denitrification chamber through the denitrification liquid inlet pipe 28 and the denitrification reversing valve 27. The nitrate reducing agent is atomized by the atomizing pipe 11 and the atomizer 10, and is evenly filled in the entire denitrification chamber, and the contact area with the tail gas is greatly increased. Here, the tail gas enters the denitrification chamber and impacts multiple liquid separation plates 5, which prolongs the retention time of the tail gas in the denitrification chamber, and the liquid separation plate 5 drives the shaft spring 6 to vibrate. The vibration of the shaft spring 6 cooperates with the vibration transmitted to the shaft spring 6 by the second sieve plate 12, so that the liquid separation plate 5 vibrates continuously in the tail gas, increasing the contact frequency between the atomized liquid of the nitrate reducing agent and the tail gas, and the nitrogen oxides in the tail gas are also reduced to water and nitrogen. The atomized nitrogen oxide reducing agent is finally concentrated in the circulation pipe 4 on the bottom wall of the denitrification chamber, and is pumped into the atomizing pipe 11 by the denitrification circulation pump 24 for repeated atomization. The denitrification circulation pump transports the denitrification liquid to the atomizer through the atomization pipe to form fine droplets, which increases the contact area between the denitrification liquid and the exhaust gas, improves the denitrification efficiency, and ensures that the denitrification liquid can cover the entire denitrification chamber, avoiding the problem of insufficient local denitrification; the vibration of the separator plate not only enhances the disturbing effect of the denitrification liquid on the exhaust gas, but also improves the mass transfer efficiency between the denitrification liquid and the exhaust gas, thereby accelerating the reduction rate of nitrogen oxides.

[0079] The tail gas has been purified after dust removal, desulfurization and denitrification. At this time, the purified gas is sucked out and discharged through the outlet pipe 8 by the negative pressure fan 9 through the hydrophobic filter membrane 7. The hydrophobic filter membrane 7 can prevent the residual atomized nitrogen oxide reducing agent liquid in the purified gas from being discharged along with the gas, thereby avoiding chemical pollution of the environment.

[0080] Example 3

[0081] The difference from the above embodiment is that, as shown in the attached Figure 1 As shown: A method for harmlessly treating combustible solid waste in the production process of medical supplies, comprising the following steps:

[0082] Step 1: Transfer and centralize solid waste. Transfer solid waste from the production process of medical supplies and centralize it to the storage module. The transfer process ensures the sealing and safety of the waste to avoid leakage and pollution.

[0083] Step 2: solid waste pretreatment: use the solid waste pretreatment module to perform pretreatment operations such as solid waste crushing and classification to improve the efficiency of subsequent treatment. During the pretreatment process, attention should also be paid to the safety and stability of the solid waste to prevent accidents.

[0084] Step 3: solid waste thermal cracking, using a solid waste thermal cracking module to thermally crack solid waste under high temperature and oxygen-free conditions, converting organic high-molecular compounds into gaseous low-molecular compounds, oil-phase liquid products and carbon ash, circulating the gaseous low-molecular compounds for heat generation to produce secondary tail gas, and killing pathogens and harmful microorganisms that may be attached therein;

[0085] Step 4: secondary tail gas treatment, using a secondary tail gas treatment device to purify the flue gas generated during the solid waste thermal cracking process, including dust removal, desulfurization and denitrification treatment processes, so that the secondary tail gas meets environmental emission standards;

[0086] Step five, solid waste recycling, use the recovery module to recover and package the coke mud and ash remaining after thermal cracking for reuse.

[0087] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0088] The above is only an embodiment of the present invention. The common sense such as the known specific structure and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field of the invention before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A harmless treatment system for combustible solid waste in the production process of medical supplies, characterized by: It includes storage module, solid waste pretreatment module, solid waste thermal cracking module, secondary tail gas treatment module and recovery module. The storage module is used to collect solid waste generated during the production of medical supplies and seal the collected solid waste for harmless treatment; Solid waste pre-processing module, used for pre-processing operations of crushing and classifying collected solid waste; The solid waste thermal cracking module is used to crack and gasify the solid waste under high temperature and oxygen-free conditions, converting the organic high-molecular compounds in the solid waste into gaseous low-molecular compounds, oil-phase liquid products and carbon ash substances, and circulating the gaseous low-molecular compounds for heat generation to produce secondary tail gas; The secondary tail gas treatment module is used to purify the secondary tail gas generated during the thermal cracking of solid waste to reduce the content of harmful substances in compliance with environmental emission standards; The recovery module is used to recover the coke mud and ash produced after thermal cracking of solid waste for reuse.

2. The harmless treatment system for combustible solid waste in the production process of medical supplies according to claim 1 is characterized by: The solid waste thermal cracking module includes a pyrolysis furnace capable of controlling temperature, air pressure and oxygen content; the recovery module includes a sludge air-drying briquetting recovery device and a renewable organic matter sorting and packaging device.

3. The harmless treatment system for combustible solid waste in the production process of medical supplies according to claim 2 is characterized by: The secondary exhaust gas treatment module includes a secondary exhaust gas treatment device, which is used for dust removal, desulfurization and denitrification of the secondary exhaust gas.

4. The harmless treatment system for combustible solid waste in the production process of medical supplies according to claim 3 is characterized by: The secondary tail gas treatment device comprises a treatment tank (1), wherein both sides of the top of the treatment tank (1) are connected with an air inlet pipe (18) and an air outlet pipe (8), the air inlet pipe (18) is connected with a solid waste thermal cracking module, a negative pressure fan (9) is connected between the treatment tank (1) and the air outlet pipe (8), and a first sieve plate (17) and a second sieve plate (12) are vertically arranged on the inner wall of the treatment tank (1), and the first sieve plate (17) and the second sieve plate (12) divide the interior of the treatment tank (1) from the air inlet pipe (18) to the air outlet pipe (8) into a dust removal chamber, A desulfurization chamber and a denitration chamber, a plurality of wall springs (16) are fixedly connected between the outer peripheries of the first sieve plate (17) and the second sieve plate (12) and the inner wall of the treatment tank (1), a telescopic rod (19) is fixedly connected between the side of the first sieve plate (17) close to the dust removal chamber and the inner wall of the air inlet pipe (18), a turbine fan (20) is rotatably sleeved on the telescopic rod (19), the desulfurization chamber is connected to a desulfurization circulation spraying assembly for circulating spraying of an alkaline solution, and the denitration chamber is connected to a denitration circulation spraying assembly for circulating spraying of a nitrate reducing agent.

5. The harmless treatment system for combustible solid waste in the production process of medical supplies according to claim 4 is characterized by: The desulfurization circulation spray assembly comprises a liquid collecting pipe (2), the liquid collecting pipe (2) is connected to the bottom wall of the desulfurization chamber, the end of the liquid collecting pipe (2) away from the desulfurization chamber is connected to a desulfurization circulation pump (23), the end of the desulfurization circulation pump (23) away from the liquid collecting pipe (2) is connected to a liquid supply pipe (14), a desulfurization reversing valve (25) is connected between the desulfurization circulation pump (23) and the liquid supply pipe (14), the desulfurization reversing valve (25) is also connected to a desulfurization liquid inlet pipe (26), a plurality of spray ports (13) are opened at the top of the desulfurization chamber, and the spray ports (13) are all connected to the liquid supply pipe (14); a rotating shaft (15) is provided in the desulfurization chamber, the two ends of which are respectively rotatably connected to the first sieve plate (17) and the second sieve plate (12), and a plurality of fan blades (3) are fixedly connected to the rotating shaft (15) along its circumference.

6. The harmless treatment system for combustible solid waste in the production process of medical supplies according to claim 5 is characterized by: The denitration circulation spray assembly comprises a circulation pipe (4), the circulation pipe (4) is connected to the bottom wall of the denitration chamber, the end of the circulation pipe (4) away from the denitration chamber is connected to a denitration circulation pump (24), the end of the denitration circulation pump (24) away from the circulation pipe (4) is connected to an atomization pipe (11), a denitration reversing valve (27) is connected between the denitration circulation pump (24) and the atomization pipe (11), the denitration reversing valve (27) is also connected to a denitration liquid inlet pipe (28), a plurality of atomizers (10) are connected to the top of the desulfurization chamber, and the atomizers (10) are all connected to the atomization pipe (11); an axial spring (6) is arranged in the denitration chamber, the two ends of the axial spring (6) are respectively fixedly connected to the second sieve plate (12) and the inner wall of the denitration chamber, and the axial spring (6) is circumferentially fixedly connected to a plurality of liquid separation plates (5).

7. The harmless treatment system for combustible solid waste in the production process of medical supplies according to claim 6 is characterized by: The first sieve plate (17) and the second sieve plate (12) are both provided with an adsorption layer (21), and the adsorption layer (21) is made of an active adsorption material.

8. The harmless treatment system for combustible solid waste in the production process of medical supplies according to claim 7 is characterized by: A hydrophobic filter membrane (7) is laid between the processing tank (1) and the negative pressure fan (9).

9. The harmless treatment system for combustible solid waste in the production process of medical supplies according to claim 8 is characterized by: The wall springs (16) are fixedly connected with elastic sealing rings (22) which are fixedly connected to the inner wall of the processing tank (1), and the inner peripheries of the elastic sealing rings (22) are respectively fixedly connected to the outer edges of the first sieve plate (17) and the second sieve plate (12).

10. A method for harmless treatment of combustible solid waste in the production process of medical supplies, characterized by: The following steps are involved: Step 1: solid waste transfer and concentration: transfer of solid waste from the production process of medical supplies and concentration in the storage module. The transfer process ensures the sealing and safety of the waste; Step 2: solid waste pretreatment: use the solid waste pretreatment module to perform pretreatment operations of solid waste crushing and classification, and pay attention to the safety and stability of the solid waste; Step 3: solid waste thermal cracking, using a solid waste thermal cracking module to thermally crack solid waste under high temperature and oxygen-free conditions, converting organic high-molecular compounds into gaseous low-molecular compounds, oil-phase liquid products and carbon ash, circulating the gaseous low-molecular compounds for heat generation to produce secondary tail gas, and killing pathogens and harmful microorganisms that may be attached therein; Step 4: secondary tail gas treatment, using a secondary tail gas treatment device to purify the flue gas generated during the solid waste thermal cracking process, including dust removal, desulfurization and denitrification treatment processes, so that the secondary tail gas meets environmental emission standards; Step five, solid waste recycling, use the recovery module to recover and package the coke mud and ash remaining after thermal cracking for reuse.

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