CN110686245A - Long-life high temperature plasma torch medical waste innocent treatment system - Google Patents

Abstract

The invention discloses a long-life high-temperature plasma torch medical waste harmless treatment system, which crushes and transmits the medical waste to a main combustion furnace through a waste feeding system. The main combustion furnace burns from top to bottom. After the medical waste enters the main combustion furnace, it is incinerated by the two-layer plasma gun installed in the circumferential direction of the main combustion furnace; the waste gas generated by the incineration enters the auxiliary combustion furnace for further incineration, and the final exhaust gas After entering the exhaust gas treatment system, it is discharged through the induced draft fan, and the normal temperature air is exchanged with the exhaust gas generated by the secondary combustion in the auxiliary combustion furnace through the heat exchanger, and the heated air is introduced into the upper part of the main combustion furnace. The supplementary air system is used to supply hot air to the main burner or normally warm air to the auxiliary burner. The invention can completely realize the harmless treatment of medical waste, and at the same time, the thermal energy of the combustion material can be used to generate electricity or be recycled to participate in baking and secondary combustion, so as to achieve the purpose of energy saving and emission reduction.

Description

A long-life high temperature plasma torch harmless treatment system for medical waste

technical field

The invention relates to the field of hazardous solid waste treatment, in particular to a harmless treatment system for long-life high-temperature plasma torch medical waste.

Background technique

With the continuous growth of urban domestic waste in my country, the situation of garbage siege has become increasingly prominent, and it has posed a serious threat to environmental security. In order to protect the homeland and develop sustainably, my country has attached great importance to environmental protection in recent years, and urgently needs to develop a new generation of energy-saving and environmentally friendly waste treatment technology.

Traditional municipal solid waste and other domestic waste treatment is mainly based on sanitary landfill, supplemented by composting and incineration. Landfill is recognized as the last choice for garbage disposal because it occupies a lot of space and pollutes groundwater. Although composting can realize the secondary utilization of some garbage, it has high cost, low fertilizer efficiency, pollution to the surrounding air environment, and there is burning and explosion. The development is still limited due to potential safety hazards; incineration treatment is generally based on direct incineration for power generation and heating, which can achieve waste reduction and secondary utilization of waste energy to a certain extent, but direct incineration often leads to excessive flue gas and odorous fumes. In addition, the incineration process is prone to secondary pollution such as dioxins and heavy metals, which can easily cause panic among residents and bring about a series of environmental problems such as environmental hazards.

Plasma technology has been developed for more than a hundred years. Due to the high temperature of high-temperature plasma and the abundance of chemically reactive particles, the high-temperature thermal environment of 3,000 degrees Celsius in its core temperature zone can destroy various intractable solid wastes such as domestic waste, including difficult medical waste disposal.

The use of high-temperature plasma to treat waste is one of the green environmental protection technologies with the most significant volume reduction effect, the most complete harmlessness and the highest degree of resource utilization. It has broad application prospects in the field of waste treatment and has strong adaptability to the treatment objects. , such as the harmless treatment of medical waste, electronic waste, chemical waste, etc., especially good at dealing with hazardous wastes that are difficult to deal with by traditional methods, such as waste pesticides and polychlorinated biphenyls and other POPs, chemical warfare agents, toxic and hazardous chemical waste and low-carbon waste. radioactive waste, etc.

SUMMARY OF THE INVENTION

Aiming at the problems of difficult and harmless treatment of medical solid waste, excessive smoke from combustion products, and easy generation of secondary pollution such as dioxins and heavy metals, the invention proposes a long-life high-temperature plasma torch for the problem of short working life of the plasma torch. The harmless treatment system of medical waste can completely realize the harmless treatment of medical waste, and at the same time, it can use the thermal energy of combustion materials to generate electricity or recycle to participate in baking and secondary combustion, so as to achieve the purpose of energy saving and emission reduction.

The present invention is a long-life high temperature plasma torch harmless treatment system for medical waste, including a waste feeding system, a waste plasma combustion system, a tail gas treatment system and a supplementary air system.

The waste feeding system is used for pulverizing and transferring the medical waste to the waste plasma combustion system; the waste plasma combustion system includes a main combustion furnace and an auxiliary combustion furnace.

The main combustion furnace is a vertical layout, which burns from top to bottom. The top is the main feed port to receive the crushed medical waste; the inner top is the material distribution port, and the medical waste entering the main combustion furnace is further divided and processed; Plasma guns are installed in the circumference of the main combustion furnace to incinerate the fallen medical waste after crushing.

The main combustion furnace is connected to the auxiliary combustion furnace through pipelines, and the auxiliary combustion furnace plasma gun is installed on the side wall of the auxiliary combustion furnace to incinerate the waste gas generated in the auxiliary combustion furnace; the slag generated in the auxiliary combustion furnace is set below and falls into the water seal The second ash collector.

The upstream to downstream of the tail gas treatment system are heat exchanger, cooling tower, activated carbon adsorption device, dust removal device, acid removal tower, first one-way valve and induced draft fan; The air at room temperature exchanges heat with the tail gas generated after secondary incineration in the auxiliary combustion furnace; the heat exchanger is connected to the main combustion furnace through pipelines, and the heated air is introduced into the upper part of the main combustion furnace.

The supplementary air system is a supplementary fan that connects the heat exchanger and the auxiliary combustion furnace through pipelines, and supplies hot air to the main combustion furnace or normal warm air to the auxiliary combustion furnace.

The advantages of the present invention are:

(1) The long-life high-temperature plasma torch medical waste harmless treatment system of the present invention, the waste feeding system can automatically realize the transmission and pulverization of medical waste, and the pulverized fine particle size waste automatically falls into the main combustion furnace total feed mouth;

(2) The long-life high-temperature plasma torch medical waste harmless treatment system of the present invention adopts the vertical main combustion furnace and the vertical auxiliary combustion furnace to carry out high-temperature plasma incineration, so that the cracking of solid particles is more thorough, and the secondary combustion of tail gas is more thorough. ;

(3) The long-life high-temperature plasma torch medical waste harmless treatment system of the present invention, the main combustion furnace is fed with a plurality of material distribution ports such as the first material distribution port and the second material distribution port, so as to avoid excessive concentration of materials. problems such as low drying efficiency and low incineration efficiency;

(4) The long-life high-temperature plasma torch medical waste harmless treatment system of the present invention, according to the high-temperature pyrolysis and incineration characteristics of the combustion furnace, multiple groups of plasma torches are arranged in multiple space areas in the furnace and are arranged in a staggered manner, forming active convection with the combustion body. The combustion method increases the combustion efficiency and prolongs the service life of the plasma gun;

(5) The harmless treatment system of the long-life high-temperature plasma torch medical waste of the present invention, an ash collector is arranged at the lower part of the combustion furnace, and the combustion slag is automatically collected to realize the automatic collection and cooling of the ashes;

(6) The long-life high-temperature plasma torch medical waste harmless treatment system of the present invention has temperature sensors arranged in different parts of the combustion zone, which is convenient for monitoring the temperature of the corresponding zone and avoids the danger caused by the temperature out of control in the furnace;

(7) The long-life high-temperature plasma torch medical waste harmless treatment system of the present invention is provided with a pressure sensor to remotely monitor the system pressure, and adjust the fan speed through the pressure to maintain a slightly negative pressure state in the furnace, which is conducive to high-temperature incineration;

(8) The long-life high-temperature plasma torch medical waste harmless treatment system of the present invention realizes exhaust heat recovery, exhaust cooling, residual dioxin and heavy metal removal, residual ash removal, sulfur dioxide and acidic substances through the tail gas treatment system Remove the exhaust gas to meet the environmental protection requirements;

(9) The long-life high-temperature plasma torch medical waste harmless treatment system of the present invention adopts an induced draft fan combined with a one-way valve to prevent gas backflow, overcome the wind resistance of process pipelines and various equipment, and ensure high-temperature pyrolysis of medical waste. Incineration micro-negative pressure environment;

(10) The long-life high-temperature plasma torch medical waste harmless treatment system of the present invention, and the supplementary air system composed of two-way fans can work simultaneously or independently, and can also serve as backups for each other, which fully guarantees the system supplementary air demand and improves the system reliability.

Description of drawings

1 is a schematic structural diagram of a long-life high-temperature plasma torch medical waste harmless treatment system of the present invention;

Fig. 2 is the single working flow of the first supplementary fan in the long-life high-temperature plasma torch medical waste harmless treatment system of the present invention;

Fig. 3 is the independent working flow of the second supplementary fan in the long-life high-temperature plasma torch medical waste harmless treatment system of the present invention;

Fig. 4 is the simultaneous working flow of the first supplementary fan and the second supplementary fan in the long-life high temperature plasma torch medical waste harmless treatment system of the present invention;

FIG. 5 is a flow chart of the application method of the long-life high temperature plasma torch medical waste harmless treatment system of the present invention.

1-Waste feeding system 2-Waste plasma combustion system 3-Tail gas treatment system

4- Make-up air system 1- Garbage conveyor 102- Shredder

201-Main combustion furnace 202-Secondary combustion furnace 201a-General feed inlet

201b - the first distribution port 201c - the second distribution port 201d - the first plasma gun

201e-second plasma gun 201f-first ash collector 201g-first air inlet

201h-first air outlet 201i-first temperature sensor 201j-second temperature sensor

201k-Third temperature sensor 2011-Fourth temperature sensor 201m-First remote pressure sensor

201n-first field pressure gauge 202a-third plasma gun 202b-second gas inlet

202c-Third Air Inlet 202d-Second Air Outlet 202e-Second Field Pressure Gauge

202f - Second Remote Pressure Sensor 202g - Fifth Temperature Sensor 202h - Second Ash Collector

202i-safety pressure relief device 301-heat exchanger 302-cooling tower

303-Activated carbon adsorption device 304-Dust removal device 305-Acid removal tower

306-First one-way valve 307-Induced fan 308-Sixth temperature sensor

309-seventh temperature sensor 310-eighth temperature sensor 401-first supplementary fan

402-Second supplementary fan 403-First stop valve 404-Second stop valve

405-pneumatic valve 406-third globe valve 407-fourth globe valve

408-Second one-way valve 409-Third one-way valve

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings.

The long-life high-temperature plasma torch medical waste harmless treatment system of the present invention includes four parts: a waste feeding system 1 , a waste plasma combustion system 2 , a tail gas treatment system 3 and a supplementary air system 4 .

The waste feeding system 1 is responsible for conveying and pulverizing medical waste, and is composed of a garbage conveyor belt 101 and a shredder 102 . Among them, the garbage conveyor 101 is used for conveying medical waste, and the end of the garbage conveyor 101 is placed above the feed port of the shredder 102. After the medical waste conveyed by the garbage conveyor 101 reaches the end, it falls into the feed of the shredder 102. The large particle size objects in the medical waste are further crushed into fine particle sizes by the crusher 102, which is convenient to improve the high temperature incineration efficiency.

The waste plasma combustion system 2 is composed of a main combustion furnace 201 and an auxiliary combustion furnace 202, which are connected by pipelines. The main combustion furnace 201 has a vertical layout and burns from top to bottom, and is mainly used for drying and high-temperature incineration of medical waste. The auxiliary combustion furnace 202 is also in a vertical layout and burns from bottom to top. It is used to incinerate the combustible gas generated by the main combustion furnace 201 and further pyrolyze macromolecular gases such as sulfides at high temperature, and remove combustible gases such as methane and refractory gases such as sulfides. , to further purify the air.

The interior of the furnace body of the above-mentioned main combustion furnace 201 is divided into a drying area, a first combustion area, a second combustion area and a burnout area from top to bottom. The main combustion furnace 201 also has a total feeding port 201a and a first material distribution port 201b , the second material distribution port 201c, the first plasma gun 201d, the second plasma gun 201e, the first ash collector 201f, the first air inlet 201g, the first air outlet 201h, the first temperature sensor 201i, the second A temperature sensor 201g, a third temperature sensor 201k, a fourth temperature sensor 2011, a first remote pressure sensor 201m, and a first on-site pressure gauge 201n. The auxiliary combustion furnace 202 has a third plasma gun 202a, a second air inlet 202b, a third air inlet 202c, a second air outlet 202d, a second on-site pressure gauge 202e, a second remote pressure sensor 202f, and a fifth temperature sensor 202g, second ash collector 202h, safety pressure relief device 202i.

In the main combustion furnace 201 , the general feed port 201 a is used to receive the medical waste particles shredded by the shredder 102 . The general feeding port 201a is designed on the top of the furnace body of the main combustion furnace 201, and is placed below the feeding port of the shredder 102; After the feeding port 201a, it enters the furnace body of the main combustion furnace 201.

The first material distribution port 201b and the second material distribution port 201c are located in the drying area and are in the shape of a funnel. All the medical waste particles entering the furnace body of the main combustion furnace 201 are further passed through the first material distribution port 201b and the second material distribution port 201c. Material separation treatment to avoid problems such as low drying efficiency and low incineration efficiency caused by excessive concentration of materials.

The first plasma gun 201d is located in the combustion zone 1, and is installed on the side wall of the main combustion furnace 201 by flange connection, and plays the role of further drying and preliminary incineration. The first plasma gun 201d is inclined upward, and the axis of the jet flame forms an angle of 45 degrees with the falling direction of the medical waste, forming an active convection combustion mode and increasing the combustion efficiency. The second plasma gun 201e is located in the combustion zone 2, and is installed on the side wall of the furnace body of the main combustion furnace 201 by flange connection. The upwardly inclined jet flame axis of the second plasma gun 201e forms an angle of 60 degrees with the falling direction of the medical waste, which forms active convective combustion and at the same time increases the depth of combustion and further improves the combustion efficiency. The above-mentioned first plasma guns 201d and second plasma guns 201e are evenly distributed four along the circumference of the furnace body side wall of the main combustion furnace 201, and are arranged in a staggered manner, so that the incineration is sufficient and the service life of the plasma guns is further extended. At the same time, by adjusting the relative spatial positions of the first plasma gun 201d, the second plasma gun 201e and the first material distribution port 201b and the second material distribution port 201c, even if the high temperature parts of the first plasma gun 201d and the second plasma gun 201e are different from The vertical lines of the nearest material distribution port intersect, which can make the incineration and gasification of solid particles more thorough and improve the incineration efficiency.

The burn-out area at the lower part of the main combustion furnace 201 is designed to be funnel-shaped, serving as an ash collection hopper, and a grate is installed on the bottom surface. The first ash collector 201f with a water seal is placed outside the main combustion furnace 201, below the grate, for automatically collecting the slag produced by the main combustion furnace 201. Therefore, after the ash produced by the secondary incineration of the medical waste particles falls into the burnout area for collection, the grate falls into the first ash collector 201f to realize automatic ash collection and cooling.

The first air inlet 201g and the first air outlet 201h are both located in the drying area of the main combustion chamber 201, and the first air inlet 201g is located higher than the first air outlet 201h, with a height difference of 100-300mm, and the first air inlet 201g It is mainly used to transport hot air to the drying area to improve the drying efficiency of medical waste;

The first to fourth temperature sensors 201i to 2011 are respectively installed in the drying zone, the first combustion zone, the second combustion zone and the burnout zone to monitor the temperature of the corresponding zone respectively, so as to avoid the danger caused by the temperature out of control in the main combustion furnace 201 . The first on-site pressure gauge 201m and the first remote pressure sensor 201n are both installed on the top of the main combustion furnace 201 to monitor the furnace pressure of the main combustion furnace 201 on-site and remotely.

In the auxiliary combustion furnace 202, the third plasma gun 202a is located in the middle of the auxiliary combustion furnace 202, and is used to incinerate the combustible gas generated by the main combustion furnace 201 entering the auxiliary combustion furnace 202 and the macromolecules such as further high-temperature cracking of sulfide, which is convenient for the later stage. Environmental protection treatment of exhaust gas. The third plasma gun 202a is inclined downward, and the axis of the jet flame forms an angle of 45 degrees with the vertical flow direction of the exhaust gas, forming an active convection high temperature incineration method, and increasing the combustion and pyrolysis efficiency. Four third plasma guns 202a are evenly distributed along the circumference of the furnace body of the auxiliary combustion furnace 202, so that the combustion is sufficient and the service life of the plasma guns is further extended.

The second air inlet 202b is communicated with the first air outlet 201h through a pipeline; the third air inlet 202c is connected to the supplementary air system 4 to realize the introduction of normal temperature air into the auxiliary combustion furnace 202 . The third air inlet 202c is located at the lower part of the furnace body of the auxiliary combustion furnace 202 and at the upper part of the burnout zone; the position of the third air inlet 202c is 100-300 mm higher than the position of the second air inlet 202b, which is convenient for the exhaust gas with light density and The air with relatively heavy density is fully mixed to improve the subsequent combustion efficiency. The second gas outlet 202d is located at the top of the furnace body of the auxiliary combustion furnace 202, and is connected to the downstream exhaust gas treatment device 3 through a pipeline, so that the exhausted exhaust gas can be transported to the downstream exhaust gas treatment device system 3 easily.

Both the second on-site pressure gauge 202e and the second remote pressure sensor 202f are installed on the top of the furnace body of the auxiliary combustion furnace 202 for monitoring the furnace body pressure of the auxiliary combustion furnace 202 on-site and remotely. The fifth temperature sensor 202g is installed on the top of the furnace body of the auxiliary combustion furnace 202 to monitor the ambient temperature of the top space of the furnace body of the auxiliary combustion furnace 202, to provide input conditions for the automatic control of the heat exchanger, and to prevent the temperature in the furnace body of the auxiliary combustion furnace 202 from running out of control. cause danger. The second ash collector 202h with a water seal is located below the outside of the auxiliary combustion furnace 202, and is used to automatically collect the slag generated in the auxiliary combustion furnace 202, so as to realize the automatic collection and cooling of the ash in the auxiliary combustion furnace 202. The safety pressure relief device 202i is installed on the top of the furnace body of the auxiliary combustion furnace 202 to ensure the safety of the equipment and prevent overpressure.

The exhaust gas treatment system 3 includes a heat exchanger 301, a cooling tower 302, an activated carbon adsorption device 303, a dust removal device 304, an acid removal tower 305, a first one-way valve 306, an induced draft fan 307, a sixth temperature sensor 308, and a seventh temperature sensor 309 It is connected with the eighth temperature sensor 310 through the exhaust gas treatment pipeline.

The inlet of the heat exchanger 301 is connected to the second air outlet 202d of the auxiliary combustion furnace 202 through a pipeline, so that the normal temperature air and the 1000-1500 degree high-temperature exhaust gas generated after the secondary incineration in the auxiliary combustion furnace 202 are in the heat exchanger 301. Fully heat exchange and recover the heat. The heat exchanger 301 is communicated with the first air inlet 201g of the main combustion furnace 201 through a pipeline, and the heated air is introduced into the drying area to participate in drying and combustion, so as to increase the initial temperature and energy in the main combustion furnace 201, and improve drying. efficiency, achieve energy saving and emission reduction, and reduce production costs. The cooling tower 302 is located downstream of the heat exchanger 301, and adopts a spray cooling method to further reduce the temperature of the flue gas to normal temperature, which is convenient for further purification of the flue gas by downstream equipment. The activated carbon adsorption device 303 is located downstream of the cooling tower 302 and has built-in activated carbon and slaked lime to absorb a small amount of residual dioxins and heavy metals in the flue gas to further purify the flue gas. The dust removal device 304 is located downstream of the activated carbon adsorption device 303, and is used to remove solid particles and ash in the flue gas to avoid environmental pollution. The acid removal tower 305 is located downstream of the dust removal device 304, and uses 25% sodium hydroxide solution to remove sulfur dioxide and acid substances in the flue gas. The induced draft fan 307 is located at the end of the exhaust gas treatment pipeline, and the outlet of the induced draft fan 307 is directly connected to the atmosphere. The induced draft fan 307 adopts a variable frequency speed-regulating fan with adjustable wind speed, which is used to overcome the wind resistance of the pipeline and various equipment, and discharge the purified flue gas into the outdoor; At the same time, the speed of the induced draft fan 307 is adjusted according to the furnace body pressure of the main and auxiliary combustion furnaces, so that the plasma high temperature pyrolysis incineration system works in a slightly negative pressure state, so as to avoid unfavorable phenomena such as pipeline overpressure and gas leakage. The first one-way valve 306 is located at the inlet of the induced draft fan 307 to prevent the backflow of the exhaust gas. The sixth temperature sensor 308 is located on the pipeline between the heat exchanger 301 and the cooling tower 302, and is used to monitor the temperature of the pipeline, collect temperature data in real time, and provide a reference for automatic control. The seventh temperature sensor 309 is located on the pipeline between the cooling tower 302 and the activated carbon adsorption device 303, and is used to monitor the temperature of the pipeline, collect temperature data in real time, and provide a reference for automatic control. The eighth temperature sensor 310 is located on the pipeline between the heat exchanger 301 and the main combustion furnace 201, and collects temperature data in real time for monitoring the temperature of this section of the pipeline to provide a reference for automatic control.

The supplementary air system 4 consists of a first supplementary fan 401, a second supplementary fan 402, a first shut-off valve 403, a second shut-off valve 404, a pneumatic valve 405, a third shut-off valve 406, a fourth shut-off valve 407, and a second shut-off valve 407. The direction valve 408 and the third one-way valve 409 are composed, and are linked by pipelines.

The first supplementary fan 401 is connected to the heat exchanger 201 through the first supplementary air pipeline; the second supplementary fan 402 is connected to the third air inlet 202c of the auxiliary combustion furnace 202 through the second supplementary air pipeline; The blower 401 and the second supplementary blower 402 can work simultaneously or independently, and can also serve as backups for each other, for supplying hot air to the main combustion furnace 201 or normal warm air to the auxiliary combustion furnace 202 to assist high-temperature incineration. The first supplementary fan 401 or the second supplementary fan 402 can ensure that in the case of failure of either one, the supplementary air volume of the other one still meets the system supplementary air demand.

The first shut-off valve 403 and the third shut-off valve 406 are installed on the first supplementary gas pipeline; the second shut-off valve 404 and the fourth shut-off valve 407 are mounted on the second supplementary pipe; the pneumatic valve 405 is installed on the first supplementary gas pipeline and On the communication pipeline installed between the second air supply pipelines, one end of the communication pipeline is connected between the first stop valve 403 and the third stop valve 406 , and the other end is connected to the second stop valve 404 and the fourth stop valve 407 . The first cut-off valve 403, the third cut-off valve 406 and the pneumatic valve 405 are used to control the working mode and the size of the make-up air volume of the first make-up fan 401 and the second make-up fan 402, and are controlled by the pneumatic valve 405 to realize the first make-up fan 401 and the second supplementary fan 402 work simultaneously or work independently for each supplementary air. The second one-way valve 408 and the third one-way valve 409 are respectively installed on the first gas supply pipeline and the second gas supply pipeline to prevent the backflow of combustible gas and cause equipment danger.

The individual working process of the above-mentioned first supplementary fan 401 is as follows:

Step 1, close the second stop valve 404;

Step 2: Open the first cut-off valve 403, the third cut-off valve 406, the fourth cut-off valve 407, and the pneumatic valve 405 in sequence;

Step 3, start the first supplementary fan 401 .

The independent work flow of the second supplementary fan 402 is as follows:

Step 1, close the first stop valve 403;

Step 2, open the second stop valve 404, the third stop valve 406, the fourth stop valve 407, and the pneumatic valve 405 in sequence;

Step 3, start the second supplementary fan 402 .

When the supplementary air volume of the main combustion furnace 201 and the auxiliary combustion furnace 202 needs to be individually and accurately controlled, the first supplementary fan 401 is activated to supplement the air for the main combustion furnace 201 alone, and the second supplementary fan 402 is activated to supplement the air for the auxiliary combustion furnace 202 alone; The working process of the first supplementary fan 401 and the second supplementary fan 402 is as follows:

Step 1, close the pneumatic valve 405;

Step 2: Open the first shut-off valve 403 and the third shut-off valve 406 in turn, and start the first supplementary fan 401;

In step 3, the second shut-off valve 404 and the fourth shut-off valve 407 are opened in sequence, and the second supplementary fan 402 is started.

The application method of the long-life high-temperature plasma torch medical waste harmless treatment system of the present invention includes the following steps:

Step 1, start the supplementary air system 4 and the induced draft fan 307 to realize supplementary air and induced air;

In step 2, the first plasma gun 201c, the second plasma gun 201d, and the third plasma gun 202a are ignited in sequence to realize a high temperature environment in the main combustion furnace 201 and the auxiliary combustion furnace 202;

Step 3, start the waste feeding system 1, transport and pulverize the medical waste, and realize the granulation of the medical waste;

In step 4, the granulated waste automatically enters the main combustion furnace 201 through the first material distribution port 201b and the second powder material port 201c, and passes through the drying zone, the first combustion zone, and the second combustion zone in sequence to realize high-temperature plasma pyrolysis and combustion;

Step 5: Driven by the induced draft fan 307, the combustion exhaust gas automatically enters the auxiliary combustion furnace 202 and continues to burn to achieve the removal of combustible gas;

In step 6, the combustion exhaust gas passes through the heat exchanger 301 and the cooling tower 302 in turn to realize thermal energy recovery and exhaust gas cooling;

In step 7, the cooled tail gas passes through the activated carbon adsorption device 303, the dust removal device 304, and the acid removal tower 305 in turn to achieve the removal of residual dioxins, heavy metals, dust particles and acid gases;

In step 8, the clean gas is driven by the induced draft fan 307 to realize direct discharge to the atmosphere.

Claims (6)

1. The utility model provides a long-life high temperature plasma torch medical waste innocent treatment system which characterized in that: comprises a waste feeding system, a waste plasma combustion system, a tail gas treatment system and an air supplementing system;

the waste feeding system is used for crushing and conveying medical waste to the waste plasma combustion system; the waste plasma combustion system comprises a main combustion furnace and an auxiliary combustion furnace

The main combustion furnace is in a vertical layout and burns from top to bottom, and the top part is a main feed inlet for receiving crushed medical wastes; the top end of the inner part is provided with a material distributing port for further distributing and treating the medical waste entering the main combustion furnace; the plasma gun is arranged on the main combustion furnace in the circumferential direction, the crushed falling medical waste is incinerated, and the incinerated ground ash falls into a first ash collector through a furnace grate at the bottom of the main combustion furnace;

the main combustion furnace is connected with the auxiliary combustion furnace through a pipeline, and an auxiliary combustion furnace plasma gun is arranged on the side wall of the auxiliary combustion furnace and burns the generated waste gas entering the auxiliary combustion furnace; slag generated in the auxiliary combustion furnace is arranged below the auxiliary combustion furnace and falls into a second ash collector with a water seal;

the tail gas treatment system comprises a heat exchanger, a cooling tower, an activated carbon adsorption device, a dust removal device, an acid removal tower, a first one-way valve and a draught fan from the upstream to the downstream in sequence; wherein, the heat exchanger is connected with the auxiliary combustion furnace through a pipeline, so that the normal temperature air is subjected to heat exchange with tail gas generated after secondary combustion in the auxiliary combustion furnace; the heat exchanger is connected with the main combustion furnace through a pipeline, and the heated air is introduced into the upper part inside the main combustion furnace;

the air supply system is characterized in that an air supply fan is connected with a heat exchanger and an auxiliary combustion furnace through pipelines, and hot air is introduced into the main combustion furnace or normal warm air is introduced into the auxiliary combustion furnace.

2. The harmless treatment system for medical wastes of a long-life high-temperature plasma torch as recited in claim 1, characterized in that: the plasma gun on the main combustion furnace comprises a first plasma gun and a second plasma gun which are arranged on the side wall of the main combustion furnace; the second plasma gun is positioned lower than the first plasma gun; the first plasma guns and the second plasma guns are uniformly distributed along the circumferential direction of the side wall of the furnace body of the main combustion furnace and are arranged in a staggered mode; the first plasma gun is obliquely arranged upwards, and the axis of the jet flame forms an angle of 45 degrees with the falling direction of the medical waste; the axis of the spraying flame of the second plasma gun which is obliquely arranged upwards forms an angle of 60 degrees with the falling direction of the medical waste.

3. The harmless treatment system for medical wastes of a long-life high-temperature plasma torch as recited in claim 1, characterized in that: the plasma gun of the auxiliary combustion furnace is arranged in a downward inclined mode, and the axis of the jet flame and the vertical flowing direction of the tail gas form an angle of 45 degrees; plasma guns of the auxiliary combustion furnace are uniformly distributed along the circumferential direction of the furnace body of the auxiliary combustion furnace.

4. The harmless treatment system for medical wastes of a long-life high-temperature plasma torch as recited in claim 1, characterized in that: the air supplementing system is provided with two air supplementing machines which are respectively a first air supplementing machine and a second air supplementing machine; the first air supplement machine is connected with the heat exchanger through a first air supplement pipeline; the second air supplement machine is connected with a third air inlet of the auxiliary combustion furnace through a second air supplement pipeline;

the first stop valve and the third stop valve are arranged on the first air supplementing pipeline; the second stop valve and the fourth stop valve are arranged on the second replenishing pipe; the pneumatic valve is arranged on a communicating pipeline arranged between the first air supplementing pipeline and the second air supplementing pipeline, one end of the communicating pipeline is connected between the first stop valve and the third stop valve, and the other end of the communicating pipeline is connected with the second stop valve and the fourth stop valve; the working mode and the air supplement amount of the first air supplement machine and the second air supplement machine are controlled through the pneumatic valve, and the first air supplement machine and the second air supplement machine can work simultaneously or independently and respectively.

5. The method for treating the harmless treatment system of the medical waste of the long-life high-temperature plasma torch as claimed in claim 4, wherein:

the independent work flow of the first air supplement fan is as follows:

step one, closing a second stop valve;

step two, opening a first stop valve, a third stop valve, a fourth stop valve and a pneumatic valve in sequence;

step three, starting a first air supplement machine;

the independent work flow of the second air supply fan is as follows:

step one, closing a first stop valve;

step two, sequentially opening a second stop valve, a third stop valve, a fourth stop valve and a pneumatic valve;

step three, starting a second air supplement machine;

the first air supplement machine and the second air supplement machine work flow simultaneously are as follows:

step one, closing a pneumatic valve;

step two, opening a first stop valve and a third stop valve in sequence, and starting a first air supplement fan;

and step three, sequentially opening the second stop valve and the fourth stop valve, and starting the second air supplement machine.

6. The method for treating the harmless treatment system of the medical waste of the long-life high-temperature plasma torch as claimed in claim 1, wherein: the method comprises the following steps:

starting an air supplementing system and an induced draft fan to supplement air and induce air;

igniting a plasma gun at the upper part of the main combustion furnace, a plasma gun at the lower part of the main combustion furnace and a plasma gun on the auxiliary combustion furnace in sequence;

step three, starting a waste feeding system;

step four, the granulated waste automatically enters the main combustion furnace through the first material dividing port and the second powder port and passes through the main combustion furnace to realize plasma high-temperature pyrolysis combustion;

step five, the combustion tail gas automatically enters the auxiliary combustion furnace to be continuously combusted under the drive of the induced draft fan;

step six, enabling the combustion tail gas to sequentially pass through a heat exchanger and a cooling tower, and realizing heat energy recycling and tail gas cooling;

seventhly, the cooled tail gas sequentially passes through an activated carbon adsorption device, a dust removal device and an acid removal tower to remove residual dioxin, heavy metals, dust particles and acid gases;

and step eight, directly discharging the clean gas into the atmosphere under the driving of a draught fan.

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