CN212430879U - Automatic-compatibility double-feeding system for medical waste and dangerous waste mixed combustion rotary kiln - Google Patents
Automatic-compatibility double-feeding system for medical waste and dangerous waste mixed combustion rotary kiln Download PDFInfo
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- CN212430879U CN212430879U CN202020531165.2U CN202020531165U CN212430879U CN 212430879 U CN212430879 U CN 212430879U CN 202020531165 U CN202020531165 U CN 202020531165U CN 212430879 U CN212430879 U CN 212430879U
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Abstract
The automatic compatible double-feeding system for the medical waste and hazardous waste mixed combustion rotary kiln belongs to the technical field of environmental protection, and comprises a sealed roller conveyor, a sealed bucket elevator, a chain plate conveyor, a sealed small feed hopper, an odor suction pipeline system, a single sealed material sealing channel, a small hydraulic material pushing system, a large feed hopper, a double sealed large-inclination-angle material channel and a large hydraulic material pushing system; the medical waste feeding system adopts a full-sealed design, and is designed under full negative pressure in the use process, and waste gas generated in the process is pumped out through an odor suction pipeline system to be used as combustion-supporting air to enter the rotary kiln for incineration; the dangerous waste feeding system consists of a chain plate conveyor, a large feeding hopper, a double-sealing large-inclination-angle material channel and a large hydraulic material pushing system. Can handle the scale design according to the difference of medical waste and danger useless to handle the different nimble regulations of material in according to actual operation, can realize independent medical waste feeding and the useless feeding of danger, can realize medical waste and the useless feeding of danger again simultaneously.
Description
Technical Field
The utility model belongs to the technical field of the environmental protection, a rotary kiln who burns simultaneously and deals with medical waste and dangerous wastes material of industry burns the charge-in system of system is related to.
Background
Hazardous waste is one of important pollution sources harming human ecological environment and human health, and is classified and managed according to the national solid waste pollution environment prevention and control law. Hazardous waste is mainly treated in a harmless manner by incineration, and medical waste is also treated in a harmless manner by incineration for projects with daily treatment capacity of more than 10 tons.
The current dangerous waste and medical waste incineration disposal are respectively disposed, and a rotary kiln system of a few comprehensive dangerous waste disposal centers is designed for incinerating and disposing the dangerous waste and the medical waste simultaneously. With the popularization of urban development and environmental-friendly circulation industrial parks, more and more rotary kiln incineration systems of hazardous waste comprehensive disposal centers have the medical waste disposal function and serve as important components of urban emergency guarantees.
At present, waste feeding devices of rotary kiln incineration systems are single feeding systems, except a waste liquid spray gun, bulk waste, blocky waste, sludge, semi-solid waste and packaged waste enter an incinerator through a set of feeding systems; the rotary kiln for treating the hazardous waste and the medical waste simultaneously also enters the incinerator through the same material channel. The same feeding system is adopted to burn hazardous waste and medical waste, and the following problems exist in the actual operation process:
1. medical wastes are infectious, and the same bucket lifting and feeding system is adopted as hazardous wastes, so that the risk of infectious substances remaining in the feeding system outside the incinerator is high, and the feeding operation workers are harmed; meanwhile, the hazardous waste feeding system is not in a full-sealed design, and harmful gas generated in the medical waste feeding process is dissipated to bring potential risks to the surrounding environment;
2. medical wastes are all loaded in a medical waste box and fed by a packaging bag, medical waste is loose, has more gaps and good compressibility, and can realize 'material sealing' in a material channel to reduce the temperature of the outer surface of the material channel, thereby simplifying a feeding cooling system; meanwhile, the material characteristics enable the hydraulic pushing pressure to be low, and the power of the hydraulic station can be reduced;
3. the medical wastes are easily-burnt wastes, and after being extruded and damaged in the material channel, the medical wastes enter the incinerator to be scattered and easily burnt, and the horizontal or small-angle material channel is generally adopted to facilitate the incineration;
4. the medical waste has high chlorine component content, and directly enters the incinerator without compatibility control, so that the incineration effect of the incinerator is influenced, and the problems of incomplete incineration, unqualified ash and slag heat ignition rate, equipment corrosion, over-standard tail gas pollutant emission and the like are caused;
5. the medical waste has high and stable heat value, can be used as an effective compatible component for hazardous waste disposal, and stably enters the heat value of the incinerator, so that the incineration is uniform; however, the existing system can not realize the real-time compatibility of medical waste and hazardous waste, and waste to a certain extent can be caused while the incineration fluctuation is caused.
Along with the larger and larger scale of the comprehensive hazardous waste disposal center, the section size of the rotary kiln incinerator is gradually increased, and the space of a kiln head cover is increased, so that the possibility is brought to the design of a multi-feeding system. Especially the requirements of automatic compatibility of double feeding systems are provided for the material properties and the incineration characteristics of hazardous wastes and medical wastes.
SUMMERY OF THE UTILITY MODEL
The utility model provides a two charge-in system through two sets of independent feeding structural design, makes charge-in system suitability wider, can realize the independent control and reach the material and add the present, reduce the operation energy consumption, and the equipment maintenance probability further reduces, is applicable to the useless burning furnace that burns of danger and doctor's waste of dealing with simultaneously.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the automatic compatible double-feeding system for the medical waste and hazardous waste mixed combustion rotary kiln comprises a sealed roller conveyor, a sealed bucket elevator, a chain plate conveyor, a sealed small feeding hopper, a single sealed material sealing channel, a small hydraulic material pushing system, a large feeding hopper, a double sealed large-inclination-angle material channel and a large hydraulic material pushing system;
the tail end of a sealed roller conveyor (5) is connected with the lower part of a vertical sealed bucket elevator (6), the top of the sealed bucket elevator (6) is provided with a slide rail overturning system, a small sealed feed hopper (8) is arranged below a goods outlet of the slide rail overturning system, the bottom of the small sealed feed hopper (8) is provided with a hydraulic sealing door, a single sealed material sealing channel (9) which is basically horizontal in the axial direction is arranged below the sealing door of the small sealed feed hopper (8), the side surface of the single sealed material sealing channel (9) is communicated and connected with the lower outlet end of the small sealed feed hopper (8) into a whole, the front port of the single sealed material sealing channel (9) is provided with a small hydraulic pushing system (10) which is coaxial with the single sealed material sealing channel (9), the rear port of the single sealed material sealing channel (9) is connected with an incinerator, and the small hydraulic pushing system (10) can push materials at the inner bottom of the single sealed material sealing channel (; an odor suction pipeline system (7) is arranged on the side surface of the upper part of the sealed bucket elevator (6) and is connected with the rotary kiln incinerator through a rotary kiln combustion fan, namely a medical waste feeding system;
a discharge port of the chain plate conveyor (1) is connected with a large feed hopper (2) in a downward connection mode, the lower end of the large feed hopper (2) is communicated with the side face of an inclined double-sealed large-inclination-angle material channel (3), the upper end part of the double-sealed large-inclination-angle material channel (3) is provided with a large hydraulic material pushing system (4) which is coaxial with the double-sealed large-inclination-angle material channel (3) and is axially provided with the large hydraulic material pushing system, the inclined lower end part of the double-sealed large-inclination-angle material channel (3) is connected with a rotary kiln incinerator, and the large hydraulic material pushing system (4) can push materials in the sealed; the above is the useless charge-in system of danger.
Preferably, the central line of the inlet of the medical waste feeding system corresponding to the rotary kiln incinerator is lower than the central line of the inlet of the hazardous waste feeding system, and the distance between the central lines of the large hydraulic pushing system (4) and the small hydraulic pushing system (10) is more than 500 mm.
Preferably, the included angle between the single sealing material sealing channel (9) and the horizontal direction is not more than 10 degrees.
Preferably, the included angle between the track of the medical waste box turnover machine at the upper part of the sealing bucket elevator 6 and the horizontal direction is more than 45 degrees.
Preferably, the included angle between the double-sealing large-inclination-angle material channel 3 and the horizontal direction is more than 30 degrees.
Preferably, the feeding capacity of the double feeding system is 5 tons/hour, the feeding capacity of the medical waste feeding system is 1 ton/hour, and the feeding capacity of the hazardous waste feeding system is 4 hours/ton.
Preferably, the single-sealing material sealing channel 9 adopts an oval double-layer material channel, an air cooling interlayer is arranged outside the feeding channel, and the sectional area of the feeding channel in the inner layer is 0.2 square meter.
Preferably, the double-seal large-inclination-angle material channel 3 is a circular double-layer material channel, a circulating cooling water interlayer is arranged outside the feeding channel, and the cross-sectional area of the feeding channel in the inner layer is 0.6 square meter.
Preferably, the height of an air suction opening of the odor air suction pipeline system 7 is lower than that of the small sealed feed hopper 8 and higher than that of the single sealed material sealing channel 9, and the air suction amount is not less than 200Nm 3/h.
Preferably, the single sealing material sealing channel 9 and the double sealing material sealing channel 3 with large inclination angle are both provided with steam fire extinguishing interfaces.
Preferably, the single sealing material sealing channel 9 adopts an air cooling mode, and the double sealing material sealing channel 3 with a large inclination angle adopts a circulating cooling mode.
Preferably, the installed power of the hydraulic station equipment of the large hydraulic pushing system 4 is not less than 18.5kw, and the installed power of the hydraulic station equipment of the small hydraulic pushing system 10 is not more than 7.5 kw.
The feeding method of the automatic compatible double-feeding system for the medical waste and hazardous waste mixed combustion rotary kiln comprises the following steps: medical wastes enter one end of a sealing roller conveyor (5) through a medical waste collecting box, the other end, namely the tail end, of the sealing roller conveyor (5) is connected with the lower part of a sealing bucket elevator (6), a slide overturning system arranged at the top of the sealing bucket elevator (6) downwards overturns the medical waste box, the medical wastes are poured out of the medical waste box and enter a small sealing feed hopper (8), dispersed medical wastes form a certain density in operation to fill the space of a single sealing material sealing channel (9), and a small hydraulic pushing system (10) keeps a certain pressure to push back and forth, so that the materials in the single sealing material sealing channel (9) gradually enter a rotary kiln incinerator (11); waste gas generated in the medical waste feeding process is connected with a combustion-supporting fan of the rotary kiln incinerator through an odor suction pipeline system (7) arranged at the upper part of a sealed bucket elevator (6), and the waste gas in the medical waste system is used as combustion-supporting air to be sent into the rotary kiln incinerator for incineration treatment; dangerous wastes enter a hopper of a chain plate conveyor (1), a discharge hole of the chain plate conveyor (1) is connected with a large feed hopper (2) in a downward connection mode, the lower portion of the large feed hopper (2) is connected with a double-sealed large-inclination-angle material channel (3), and a large hydraulic material pushing system (4) keeps certain pressure to push back and forth, so that the dangerous wastes in the double-sealed large-inclination-angle material channel (3) enter a rotary kiln incinerator in batches.
Preferably, the feeding speed of the medical waste system can be automatically adjusted according to the heat value and the feeding speed of the hazardous waste, so that the large hydraulic pushing system (4) and the small hydraulic pushing system (10) are both connected with the control system, the feeding speed of the medical waste and the hazardous waste is controlled by controlling the large hydraulic pushing system (4) and the small hydraulic pushing system (10), the heat value of waste entering the incinerator is ensured to be stable, auxiliary fuel is saved, and the adjustment formula between the medical waste feeding speed and the hazardous waste feeding parameter branch is as follows:
wherein: vMedicine for treating: the feeding speed of medical wastes is measured by the running speed of a hydraulic pushing head in the small hydraulic pushing system 10 in mm/min;
QS: the rotary kiln incinerator meets the standard heat value of self-sustaining combustion, and the value is 3500kCal/kg according to the operation experience of similar domestic projects;
Qdanger(s): the average heat value of the hazardous waste after being compounded is in kCal/kg;
Qmedicine for treating: taking 4500kCal/kg of the average heat value of medical wastes according to domestic related data;
Gdanger(s): the feeding speed of hazardous waste is unit kg/h;
Pmedicine for treating: the average density of medical wastes is slightly different in different areas, and the value range is 400-800kg/m3，
AMedicine for treating: the sectional area of the feeding channel at the inner layer of the single sealing material sealing channel 9 is 0.2 square meter;
substitute industry empirical value and the utility model discloses well equipment parameter, two feeding system traditional chinese medical science useless feed rate application formulas as follows:
the utility model PMedicine for treatingAverage value of 600kg/m3；
VMedicine for treating＝(0.49-0.00014QDanger(s))GDanger(s)
The utility model provides a can automatic compatibility double feed system for giving up a decoction or waste and danger waste co-combustion rotary kiln designs the medicine and useless feeding and danger waste feed system alone, builds two sets of independent systems, compares with traditional common design, has increased system operation flexibility on the one hand, avoids the relevant influence of feeding frequency and the feed rate of two kinds of wastes material; on the other hand, through an independent medical waste feeding system, when medical waste is stably treated, the medical waste can be regarded as special fuel with stable heat value, and through the compatibility of the heat value and chlorine element, the medical waste heat value is fully utilized to supplement the combustion energy of dangerous waste, so that stable combustion is realized, and energy is saved. The double-feeding system can be used for short-term mutual standby when any one feeding system fails, and non-stop maintenance under low load is realized. This two charge-in systems fully consider the difference in various aspects of characteristic of dangerously useless and medical waste, when categorised stable feeding, through the differentiation design, reduced medical waste feeding size and hydraulic system power consumption, can effective control running cost.
Drawings
Fig. 1 is a schematic view of the installation structure of the embodiment of the automatic compatible double-feeding system of the rotary kiln for mixed combustion of medical waste and hazardous waste.
Fig. 2 is a sectional view a-a of fig. 1, which is a side view of a hazardous waste feeding system.
FIG. 3 is a sectional view taken along line B-B of FIG. 1, showing a side view of the medical waste feeding system.
In the figure: 1. the device comprises a chain plate conveyor, 2 parts of a large feed hopper, 3 parts of a double-sealing large-inclination-angle material channel, 4 parts of a large hydraulic material pushing system, 5 parts of a sealing roller conveyor, 6 parts of a sealing bucket elevator, 7 parts of an odor suction pipeline system, 8 parts of a sealing small feed hopper, 9 parts of a single-sealing material sealing channel, 10 parts of a small hydraulic material pushing system and 11 parts of a rotary kiln incinerator.
Detailed Description
A preferred embodiment of the present invention will be described in detail with reference to fig. 1 to 3.
The structure of the automatic compatible double-feeding system for the medical waste and hazardous waste mixed-combustion rotary kiln in the embodiment is shown in fig. 1, 2 and 3, and mainly comprises a hazardous waste feeding system and a medical waste feeding system. The dangerous waste feeding system consists of a chain plate conveyor 1, a large feeding hopper 2, a double-sealing large-inclination-angle material channel 3 and a large hydraulic pushing system 4; the medical waste feeding system consists of a sealing roller conveyor 5, a sealing bucket elevator 6, an odor suction opening 7, a sealing small feed hopper, a single sealing material sealing channel 9 and a small hydraulic pushing system 10.
The utility model provides a can automatic compatibility double feed system's work flow and principle for giving medicine useless and the useless mixed combustion rotary kiln of danger: dangerous waste is stored in a material pit, the dangerous waste is grabbed by a travelling crane to enter a chain plate conveyor 1, the dangerous waste is horizontally conveyed into a large feed hopper 2 to be buffered according to a set rotating speed, and the waste enters an incinerator after passing through two-stage sealing doors of a double-sealing large-inclination-angle material channel 3 according to the setting of incineration feeding frequency; the large hydraulic pushing system 4 keeps certain pressure pushing, so that hazardous wastes in the 3 enter the incinerator in batches. If the phenomena of material blockage and material blockage occur in the operation process, the waste materials can be pushed into the incinerator by increasing the pressure of 4. The medical waste is discharged from a refrigeration house or a medical waste vehicle and then is sent to the front of an incinerator, a medical waste box is clamped into a sealed roller conveyor 5 by manual assistance, the medical waste is sequentially and horizontally transported to the lower part of a sealed bucket elevator 6 by a roller way at a designed speed, the elevator vertically lifts the medical waste box to a designed height, the medical waste box is downwards overturned by a slideway overturning system arranged at the top of the elevator 6, the medical waste is poured out from a collecting box and enters a small sealed feeding hopper 8, a hydraulic sealing door is arranged at the bottom of the hopper 8 and is periodically opened according to the programmed time, a single sealed material sealing channel 9 is arranged below the sealing door of the hopper 8, the medical waste enters the channel of the hopper 9 after the sealing door is opened, the medical waste slides into a rotary kiln along with the continuous addition of the medical waste, a material seal with a certain density and full of a space of 9 is formed inside the hopper 9, the smoke in the incinerator is ensured not to overflow, and a small, so that the materials in the 9 gradually enter the incinerator; the medical waste feeding system adopts a full-sealed design, a full negative pressure design is adopted in the using process, waste gas generated in the process is connected with a rotary kiln combustion-supporting fan through an odor suction pipeline system 7 arranged on the upper portion of the rotary kiln feeding system 6, and the waste gas in the medical waste feeding system is used as combustion-supporting air to be sent into the rotary kiln for incineration treatment. The double feeding systems work simultaneously, medical waste and dangerous waste are simultaneously fed into the rotary kiln at a set speed in time, and the two wastes are mixed and combusted in the rotary kiln.
The utility model is suitable for a synthesize useless center or the solitary hazardous waste incineration factory of handling of danger, the useless burning furnace that burns of medical waste and danger is handled simultaneously also is applicable to simultaneously and burns the useless burning furnace of handling danger and reserve the useless system of emergent medical waste of handling.
Claims (8)
1. The automatic compatible double-feeding system for the medical waste and hazardous waste mixed combustion rotary kiln is characterized by comprising a sealing roller conveyor, a sealing bucket elevator, a chain plate conveyor, a small sealing feed hopper, a single sealing material sealing channel, a small hydraulic material pushing system, a large feed hopper, a double sealing large-inclination-angle material channel and a large hydraulic material pushing system;
the tail end of a sealed roller conveyor (5) is connected with the lower part of a vertical sealed bucket elevator (6), the top of the sealed bucket elevator (6) is provided with a slide rail overturning system, a small sealed feed hopper (8) is arranged below a goods outlet of the slide rail overturning system, the bottom of the small sealed feed hopper (8) is provided with a hydraulic sealing door, a single sealed material sealing channel (9) which is basically horizontal in the axial direction is arranged below the sealing door of the small sealed feed hopper (8), the side surface of the single sealed material sealing channel (9) is communicated and connected with the lower outlet end of the small sealed feed hopper (8) into a whole, the front port of the single sealed material sealing channel (9) is provided with a small hydraulic pushing system (10) which is coaxial with the single sealed material sealing channel (9), the rear port of the single sealed material sealing channel (9) is connected with an incinerator, and the small hydraulic pushing system (10) can push materials at the inner bottom of the single sealed material sealing channel (; an odor suction pipeline system (7) is arranged on the side surface of the upper part of the sealed bucket elevator (6) and is connected with the rotary kiln incinerator through a rotary kiln combustion fan, namely a medical waste feeding system;
a discharge port of the chain plate conveyor (1) is connected with a large feed hopper (2) in a downward connection mode, the lower end of the large feed hopper (2) is communicated with the side face of an inclined double-sealed large-inclination-angle material channel (3), the upper end part of the double-sealed large-inclination-angle material channel (3) is provided with a large hydraulic material pushing system (4) which is coaxial with the double-sealed large-inclination-angle material channel (3) and is axially provided with the large hydraulic material pushing system, the inclined lower end part of the double-sealed large-inclination-angle material channel (3) is connected with a rotary kiln incinerator, and the large hydraulic material pushing system (4) can push materials in the sealed; the above is the useless charge-in system of danger.
2. The automatic compatible double feeding system for the medical waste and hazardous waste mixed combustion rotary kiln as claimed in claim 1, wherein the center line of the inlet of the corresponding medical waste feeding system in the rotary kiln incinerator is lower than the center line of the inlet of the hazardous waste feeding system, and the distance between the center lines of the large hydraulic pushing system (4) and the small hydraulic pushing system (10) is more than 500 mm.
3. The automatic compatible double feed system for the mixed combustion rotary kiln of medical wastes and hazardous wastes according to claim 1, wherein the included angle of the single sealing material sealing channel (9) and the horizontal direction is not more than 10 degrees; an included angle between a track of the medical waste box tilter at the upper part of the sealed bucket elevator and the horizontal direction is more than 45 degrees; the included angle between the double-sealing large-inclination-angle material channel and the horizontal direction is more than 30 degrees.
4. The automatic compatible double feed system for the medical waste and hazardous waste mixed combustion rotary kiln according to claim 1, wherein the single sealing material sealing channel adopts an oval double-layer material channel, an air cooling interlayer is arranged outside the feed channel, and the cross-sectional area of the inner layer feed channel is 0.2 square meters.
5. The automatic compatible double-feeding system for the rotary kiln for mixed combustion of medical wastes and hazardous wastes according to claim 1, wherein the double-sealed large-inclination-angle material channel (3) adopts a circular double-layer material channel, a circulating cooling water interlayer is arranged outside the feeding channel, and the cross section area of the feeding channel of the inner layer is 0.6 square meters.
6. The automatic compatible double feed system for the rotary kiln for mixed combustion of medical waste and hazardous waste according to claim 1, wherein the height of the air suction inlet of the odor air suction pipeline system is lower than that of the small sealed feed hopper and higher than that of the single sealed material sealed channel, and the air suction volume is not less than 200Nm3In terms of hours.
7. The automatically compatible dual feeding system for the rotary kiln for mixed combustion of medical wastes and hazardous wastes as claimed in claim 1, wherein the single sealing material sealing channel and the dual sealing large-inclination material channel are provided with steam fire extinguishing interfaces; the single sealing material sealing channel adopts an air cooling mode, and the double sealing large-inclination-angle material channel adopts a circulating cooling mode.
8. The automatic compatible double feeding system for the medical waste and hazardous waste mixed combustion rotary kiln according to claim 1, characterized in that the large hydraulic pushing system (4) and the small hydraulic pushing system (10) are both connected with a control system.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114235121A (en) * | 2021-12-14 | 2022-03-25 | 杭州电子科技大学 | Cement kiln deals with solid-state hazardous waste automatic blending weighing device in coordination |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114235121A (en) * | 2021-12-14 | 2022-03-25 | 杭州电子科技大学 | Cement kiln deals with solid-state hazardous waste automatic blending weighing device in coordination |
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