CN111442286A - A plasma skid-mounted treatment device and process for treating medical waste - Google Patents

Abstract

The invention discloses a plasma skid-mounted treatment device and a process for treating medical waste, comprising a first skid-mounted box and a second skid-mounted box; unit and flue gas processing unit; the second skid box includes a feeding unit, a compressed air manufacturing unit, a compressed oxygen manufacturing unit, a cooling water manufacturing unit, a power distribution unit and a control unit; the feeding unit is connected with the feeding unit, and the compressed oxygen manufacturing unit and the cooling water production unit are respectively connected to the gasification incineration unit. By arranging the first skid-mounted box and the second skid-mounted box, the invention is convenient and flexible to move, meets the requirements of complex sites and field layouts, has short processing and production cycles, and is mostly connected by ferrule flanges, which is convenient for assembly, and can be matched with 250KW. For diesel generator sets, only water supply is required on site, and there are water and gas ports and electrical instrument ports left in the skid-packed box. The maximum processing capacity can reach 2.5 tons/day, continuous feeding, continuous slag discharge, simple and reliable process, and no external waste water.

Description

A plasma skid-mounted treatment device and process for treating medical waste

technical field

The invention relates to the technical field of chemical environmental protection equipment, in particular to a plasma skid-mounted processing device and a process for processing medical waste.

Background technique

Relevant studies have shown that cross-infection caused by medical waste accounts for more than 20% of the total cross-infection rate. Medical waste can easily become a source of infection for epidemics. If the management is not strict or improperly disposed of, it will easily lead to medical waste pollution accidents and cause serious damage to the personal safety of surrounding residents and local economic development. How to dispose of medical waste in a safe, reasonable and timely manner is a severe test for the treatment capacity of medical waste devices in various places. At present, the method of on-site treatment of this medical waste is extremely simple, mainly divided into cooking and direct gasification and incineration. The operating environment of the on-site treatment device is harsh and the risk is extremely high. If the process is not completely treated, it is easy to produce secondary hazardous waste pollution. The on-site treatment device has almost no exhaust gas treatment facilities, and dioxins and escape viruses are likely to cause secondary hazards. The processing device still cannot meet the demand of the processing capacity.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a medical waste disposal device that can be fast, centralized, easy to move, and easy to install, which completely solves the problem of massive accumulation of medical wastes from COVID-19 that cannot be effectively disposed of.

In order to achieve the above object, one aspect of the present invention provides a plasma skid-mounted processing device for treating medical waste, comprising a first skid-mounted box and a second skid-mounted box;

The first skid-mounted box includes a feeding unit, a gasification incineration unit and a flue gas treatment unit connected in sequence;

The second skid-mounted box includes a feeding unit, a compressed air manufacturing unit, a compressed oxygen manufacturing unit, a cooling water manufacturing unit, a power distribution unit and a control unit;

The feeding unit is connected to the feeding unit, and the compressed oxygen production unit and the cooling water production unit are respectively connected to the gasification incineration unit.

Further, the gasification incineration unit includes a plasma gasifier and a secondary combustion chamber connected in sequence.

Further, the flue gas treatment unit includes a spray tower, an air quenching tower, a bag filter, a fan and a chimney connected in sequence.

Further, the compressed air manufacturing unit includes an air compressor and an air tank.

Further, the compressed oxygen production unit includes an oxygen generator and an oxygen tank.

Further, the cooling water manufacturing unit includes a refrigeration unit.

Another aspect of the present invention provides a plasma skid-mounted treatment process for treating medical waste, comprising the following steps:

(1) The medical waste after packaging and sealing treatment is sent to the feeding unit in the first skid-mounted box through the feeding unit in the second skid-mounted box, and enters the plasma gasifier;

(2) The medical waste is gasified and cracked in the plasma gasifier to generate syngas, and the syngas enters the secondary combustion chamber for combustion to generate high-temperature flue gas;

(3) The high temperature flue gas enters the spray tower for deacidification and cooling treatment;

(4) the flue gas processed by step (3) enters the air quencher for further cooling treatment;

(5) The flue gas processed in step (4) enters the bag filter for dust removal, and an activated carbon slaked lime injection system is arranged in front of the bag filter to remove dust and solid salts carried in the flue gas;

(6) The flue gas processed in step (5) is drawn out by the fan and discharged into the atmosphere through the chimney.

Further, in step (1), the packaging and sealing treatment is specifically: packaging and sealing the medical waste into a plastic bag with a preset specification.

Further, in step (2), the temperature at the bottom of the plasma gasifier reaches above 1350°C, and the temperature in the top gasification zone is controlled at 850-900°C, so as to ensure the gasification strength and avoid the softening point temperature of the fly ash.

Further, in step (3), the outlet temperature of the spray tower is 500-550° C. to ensure that no waste water is produced, and 10% ammonia water is sprayed for denitrification if necessary.

Further, in step (4), the form of air quenching is used to complete within 1 second, so as to speed up the flow rate of the flue gas, avoid the reverse generation of dioxin, and at the same time, the generated hot air is transported to the secondary combustion chamber to increase the combustion efficiency.

Further, in step (5), the dust content at the outlet of the bag filter is ≤30 mg/Nm ³ .

Further, in step (6), the induced draft fan is controlled by frequency conversion and interlocked with the pressure of the plasma gasifier to ensure the operation of the system with a slight negative pressure.

Compared with the prior art, the present invention has the following beneficial effects:

(1) By setting the first skid-mounted box and the second skid-mounted box, the present invention is convenient and flexible to move, meets the needs of complex sites and field layouts, has a short processing and production cycle, and is mostly connected by clip-on flanges, which is convenient for assembly. It can be matched with a 250KW diesel generator set. Only water supply is required on site. There are water and gas ports, electrical instrument ports, and material inlets in the skid-packed box. The maximum processing capacity can reach 2.5 tons/day. Continuous feeding, continuous slag discharge, simple and reliable process, No external waste water is produced.

(2) The present invention is equipped with tail gas treatment devices such as cooling, dust removal, deacidification, and denitration, and the flue gas is discharged up to the standard.

(3) The present invention adopts an external feeding mechanism. After the first skid-mounted box and the second skid-mounted box are in place, the connection can be completed by aligning the feeding unit and the feeding unit.

Description of drawings

Fig. 1 is the structural representation of the first skid-packed box of the present invention;

FIG. 2 is a schematic structural diagram of the second skid-mounted box of the present invention.

In the figure: 1. Feeding unit; 2. Plasma gasifier; 3. Second combustion chamber; 4. Spray tower; 5. Air quenching tower; 6. Second activated carbon slaked lime injection system; 7. Bag filter; 8. Induced draft fan; 9. Chimney; 10. High water tank; 11. PLC display screen; 12. Electrical instrument outlet; 13. Oxygen generator; 14. Suction dryer; 15. Air compressor; 16. Oxygen tank; 17. Air Tank; 18. Refrigeration unit; 19. Telescopic belt conveyor; 20. Power distribution cabinet; 21. Control cabinet; 22. Water vapor port; 23. Electric instrument inlet.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that, herein, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that these entities or operations are the same. any such actual relationship or sequence exists. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device that includes a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element.

Figures 1 and 2 are schematic structural diagrams of the plasma skid-mounted processing device for treating medical waste according to the present embodiment, including a first skid-mounted box and a second skid-mounted box, and the first skid-mounted box includes sequentially Connected feeding unit 1, plasma gasifier 2 and secondary combustion chamber 3 of gasification incineration unit, spray tower 4 of flue gas treatment unit, air quenching tower 5, activated carbon slaked lime injection system 6, bag filter 7, lead Fan 8 and chimney 9, the second skid-mounted box includes a telescopic belt conveyor 19 of a feeding unit, an air compressor 15 and an air tank 17 of a compressed air manufacturing unit, an oxygen generator 13 and an oxygen tank 16 of the compressed oxygen manufacturing unit, The refrigeration unit 18 of the cooling water production unit, the power distribution cabinet 20 of the power distribution unit, and the control cabinet 21 of the control unit.

In this embodiment, the wires and cables between the first skid-mounted box and the second skid-mounted box and the instrument air pipeline are connected through the electrical instrument outlet 12 and the electrical instrument inlet 23.

In this embodiment, the second skid-mounted box further includes a suction dryer 14 , and the oxygen generated by the oxygen generator 13 is dried by the suction dryer 14 and then enters the oxygen tank 16 to supply the plasma torch in the plasma gasifier 2 . Oxygen and water vapor generated by the suction dryer 14 are discharged through the water vapor port 22 .

In this embodiment, the compressed air generated by the air compressor 15 enters the air tank 16, and the air tank 16 enters the first skid-mounted box through the instrument air pipeline to provide compressed air for it.

In this embodiment, the refrigeration unit 18 provides chilled water for the plasma torch in the plasma gasifier 2 .

In this embodiment, the power distribution cabinet 20 and the control cabinet 21 provide the power and control system for the entire device, enter the first skid-mounted box through wires and cables, provide power for it, and perform display control through the PLC display screen 11. When the power supply conditions are available, it can be matched with a 250KW diesel generator set.

The plasma skid-mounted treatment process for treating medical waste in this embodiment includes the following steps:

(1) The medical waste after packaging and sealing treatment is sent to the feeding unit 1 in the first skid-mounted box through the feeding unit in the second skid-mounted box, and enters the plasma gasifier 2; wherein, the packaging is sealed The processing is specifically: packing the medical waste into a plastic bag with a preset specification through packaging and sealing.

(2) The medical waste is gasified and cracked in the plasma gasifier 2 to generate 850-900°C syngas, which enters the secondary combustion chamber 3 for combustion to generate 1150-1200°C high-temperature flue gas.

(3) The high-temperature flue gas enters the spray tower 4 for deacidification and cooling treatment, and the temperature of the flue gas is lowered to 500-550° C. to ensure that no waste water is generated. If necessary, 10% ammonia water is sprayed for denitrification. The top of the spray tower 4 is provided with a high-level water tank 10 Provide water for spray towers.

(4) The flue gas processed in step (3) enters the air quencher 5 for further cooling treatment, and the flue gas temperature is reduced to 180-200°C. The cooling of the flue gas in the air quenching tower 5 is completed within 1 second, which speeds up the flow rate of the flue gas and avoids the reverse generation of dioxins. At the same time, the generated hot air is transported to the secondary combustion chamber 3 to increase the combustion efficiency.

(5) The flue gas processed in step (4) enters the bag filter 7 for dedusting treatment. An activated carbon slaked lime injection system 6 is arranged in front of the bag filter 7 to remove dust and solid salts carried in the flue gas. The outlet dust content of 7 is less than or equal to 30mg/Nm ³ .

(6) The flue gas processed in step (5) is drawn out through the fan 8 and discharged into the atmosphere through the chimney 9. Among them, the fan 8 is controlled by frequency conversion, which is interlocked with the pressure of the plasma gasifier 2 to ensure the micro-negative pressure operation of the system.

In this embodiment, the plasma gasifier 2, the secondary combustion chamber 3, and the spray tower 4 are in the form of refractory materials and water-cooling jackets, so as to ensure the land occupation and prolong the service life of the equipment.

It will be apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, but that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments are to be regarded in all respects as illustrative and not restrictive, and the scope of the invention is to be defined by the appended claims rather than the foregoing description, which are therefore intended to fall within the scope of the claims. All changes within the meaning and scope of the equivalents of , are included in the present invention. Any reference signs in the claims shall not be construed as limiting the involved claim.

In addition, it should be understood that although this specification is described in terms of embodiments, not each embodiment only includes an independent technical solution, and this description in the specification is only for the sake of clarity, and those skilled in the art should take the specification as a whole , the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims (10)

1. A plasma skid-mounted treatment device for treating medical wastes is characterized by comprising a first skid-mounted box and a second skid-mounted box;

the first skid-mounted box comprises a feeding unit, a gasification incineration unit and a flue gas treatment unit which are sequentially connected;

the second skid-mounted box comprises a material feeding unit, a compressed air manufacturing unit, a compressed oxygen manufacturing unit, a cooling water manufacturing unit, a power distribution unit and a control unit;

the feeding unit is connected with the feeding unit, and the compressed oxygen manufacturing unit and the cooling water manufacturing unit are respectively connected with the gasification incineration unit.

2. The processing apparatus according to claim 1, wherein the gasification incineration unit comprises a plasma gasification furnace and a secondary combustion chamber connected in series.

3. The processing device according to claim 1, wherein the flue gas processing unit comprises a spray tower, an air quenching tower, a bag-type dust remover, a fan and a chimney which are connected in sequence.

4. The processing apparatus according to claim 1, wherein the compressed air manufacturing unit comprises an air compressor and an air tank.

5. The process plant of claim 1, wherein the compressed oxygen production unit comprises an oxygen generation host and an oxygen tank.

6. The processing apparatus according to claim 1, wherein the cooling water manufacturing unit comprises a freezer unit.

7. A plasma skid-mounted treatment process for treating medical wastes is characterized by comprising the following steps:

(1) conveying the medical waste subjected to packaging and sealing treatment to a feeding unit in the first prying box through a feeding unit in the second prying box, and feeding the medical waste into a plasma gasification furnace;

(2) the medical waste is gasified and cracked in the plasma gasification furnace to generate synthesis gas, and the synthesis gas enters a secondary combustion chamber to be combusted to generate high-temperature flue gas;

(3) the high-temperature flue gas enters a spray tower for deacidification and cooling treatment;

(4) the flue gas treated in the step (3) enters an air quencher for further cooling treatment;

(5) enabling the flue gas treated in the step (4) to enter a bag-type dust remover for dust removal treatment, and arranging an activated carbon slaked lime injection system in front of the bag-type dust remover to remove dust and solid salt carried in the flue gas;

(6) and (5) pumping the flue gas treated in the step (5) out by a fan, and discharging the flue gas into the atmosphere through a chimney.

8. The device according to claim 7, wherein in step (1), the package sealing process is specifically: and packaging the medical waste into a plastic bag with a preset specification in a sealing manner.

9. The apparatus as claimed in claim 7, wherein in step (3), the outlet temperature of the spray tower is 500-550 ℃.

10. The device according to claim 7, wherein in the step (5), the outlet dust content of the bag-type dust remover is less than or equal to 30mg/Nm³。

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