CN117190707A

CN117190707A - System for dangerous waste multiple spot atomizing goes into kiln

Info

Publication number: CN117190707A
Application number: CN202311336389.2A
Authority: CN
Inventors: 郭光明; 袁文平; 姜其立; 单瑞
Original assignee: Beijing Science And Tech Research Inst
Current assignee: Beijing Science And Tech Research Inst
Priority date: 2023-10-16
Filing date: 2023-10-16
Publication date: 2023-12-08

Abstract

The invention provides a system for multi-point atomization of dangerous waste into a kiln, which comprises: a crushing-mixing-pumping system, a diverter valve and a plurality of sets of atomizing devices; the material outlet of the crushing-mixing-pumping system is connected with the inlet of a diverter valve, each outlet of the diverter valve is connected with the inlet of an atomization device, and the outlet of the atomization device is connected with a cement kiln pre-decomposition furnace; the atomizing device comprises a spray gun device and a step furnace; the step furnace comprises a furnace body, steps, an air inlet pipe and a plurality of air cannons; the ladder is arranged in the furnace body; a plurality of air cannons are arranged on the vertical surface of the ladder; the air inlet pipe is connected with the side wall of the top of the furnace body; the spray gun device material inlet is connected with the diverter valve outlet, and the spray gun device material outlet is connected with the furnace body material inlet; the furnace body discharge port is connected with a cement kiln pre-decomposing furnace. The system realizes the multi-point kiln entry of the SMP system, so that the capacity of the SMP system is fully exerted; the spray gun device and the air cannon are adopted to atomize the hazardous waste twice, so that the problems of skinning and blockage at the outlet of the spray gun and insufficient material combustion are solved, and the cooperative treatment amount is improved.

Description

System for dangerous waste multiple spot atomizing goes into kiln

Technical Field

The invention belongs to the technical field of solid waste treatment, and particularly relates to a system for multi-point atomization of dangerous waste into a kiln.

Background

The dangerous waste includes solid distillation residue, distillation residual liquid, waste liquid, iron barrel, plastic barrel, woven bag, etc. At present, hazardous waste is treated mainly by incineration and safe landfill. The safe landfill has the problems of occupying a large amount of land, high cost and the like, and the incineration is a more suitable method. The method is that the dangerous waste is pretreated and burnt as the substitute raw material or the substitute fuel of the cement kiln after meeting kiln entering conditions, and the method can utilize the solid waste with high heat energy to replace the fuel of the cement kiln, thereby reducing the use of non-renewable resources. Thus, cement kilns cooperatively dispose of hazardous waste is currently the most effective method of disposing of hazardous waste.

Cement kilns co-operate to dispose of hazardous waste, typically by a crush-mix-pump (SMP system) process, and the hazardous waste is treated and then transported to a pre-decomposing furnace of the cement kiln for incineration. For example, chinese patent publication No. CN215336357U discloses a remote relay pumping solid waste into kiln incineration system, which comprises a two-stage mixer, a conveying pipeline, a spray gun and a cement kiln decomposing furnace, wherein the materials mixed by the first-stage mixer are pumped into the second-stage mixer through the solid pump, and after secondary mixing, the solid waste is pumped into the conveying pipeline through the solid pump, and the spray gun at the tail end of the conveying pipeline sends the solid waste into the cement kiln decomposing furnace for incineration.

However, the existing crushing-mixing-pumping system can only set one pipeline from the solid pump to the cement kiln pre-decomposition furnace, namely, only point-to-point single conveying from the SMP system to the cement kiln pre-decomposition furnace can be realized, and materials are conveyed to the cement kiln pre-decomposition furnace, so that the productivity of the SMP system can not be fully exerted. And a new solid pump is needed to be added for realizing the multi-point kiln feeding of dangerous wastes to two or more cement kilns in the same factory. In addition, the existing SMP system hazardous waste enters the kiln through a spray gun, and for the pasty materials with high viscosity and poor fluidity, the pasty materials cannot flow out of a pipeline, the pipeline outlet materials are hardened at first under the action of high temperature to block the pipeline outlet, and the pasty materials cannot be fully combusted in a pre-decomposition furnace, so that the problems of exceeding of the standard of CO emission fluctuation of a cement kiln system and low treatment amount of the cement kiln CO-processed hazardous waste in the pumping process are caused.

Disclosure of Invention

The invention solves the technical problem of providing a system for feeding dangerous waste into a kiln through multipoint atomization, which realizes a multipoint kiln feeding scheme that one SMP system feeds dangerous waste to a plurality of cement kiln pre-decomposition furnaces, and can fully exert the capacity of the SMP system through the multipoint kiln feeding; the spray gun device and the air cannon are adopted to carry out first atomization and second atomization on dangerous wastes, the problems of skinning and blockage at the outlet of the spray gun and exceeding standard of CO emission fluctuation are solved, and the CO-treatment capacity is improved.

In order to solve the above problems, the present invention provides a system for multi-point atomizing hazardous waste into a kiln, comprising:

a crushing-mixing-pumping system, a diverter valve and a plurality of sets of atomizing devices; the discharging port of the solid pump of the crushing-mixing-pumping system is connected with the inlet of the flow dividing valve through a main pipeline, each outlet of the flow dividing valve is connected with the inlet of one set of atomizing device through a branch pipeline, and the outlet of each set of atomizing device is connected with a cement kiln pre-decomposition furnace;

the atomizing device comprises a spray gun device and a step furnace; the step furnace comprises a furnace body, steps, an air inlet pipe and a plurality of air cannons; the ladder is arranged in the furnace body; a plurality of air cannons are arranged on the vertical surface of each layer of the ladder; the air inlet pipe is connected with the side wall of the top of the furnace body; the feeding port of the spray gun device is connected with the outlet of the flow dividing valve through the branch pipeline, and the discharging port of the spray gun device is connected with the feeding port at the top of the furnace body; a discharge hole at the bottom of the furnace body is connected with the cement kiln pre-decomposition furnace; the spray gun device is used for carrying out primary atomization on the dangerous waste, and the air cannon is used for carrying out secondary atomization on the dangerous waste.

Preferably, the diverter valve is a three-way diverter valve; the system for multi-point atomization of the hazardous waste into the kiln comprises two sets of atomization devices.

Preferably, the diverter valve comprises a valve body, a plug body, a valve seat and a shaft body; the valve body is provided with a valve cavity, an inlet channel, a first outlet channel and a second outlet channel, and the inlet channel, the first outlet channel and the second outlet channel are communicated with the valve cavity; the plug body is rotatably arranged in the valve cavity through the shaft body; valve seats matched and sealed with the plug body are arranged in the inlet channel, the first outlet channel and the second outlet channel; the included angle between the central axis of the inlet channel and the central axis of the first outlet channel is 130-150 degrees; the included angle between the central axis of the inlet channel and the central axis of the second outlet channel is 130-150 degrees; the plug body is internally provided with a plug body channel penetrating through the plug body, the central shaft of the plug body channel is arc-shaped, and when one end of the plug body channel is communicated with the inlet channel, the other end of the plug body channel is communicated with the first outlet channel or the second outlet channel.

Preferably, the outer surface of the plug body is overlaid with wear-resistant material; the contact part of the valve seat and the plug body is overlaid with wear-resistant materials; the plug body is in clearance fit with the valve body, and the clearance between the plug body and the valve body is 0.1-0.25mm.

Preferably, the valve cavity comprises a cavity wall, an upper valve cover and a lower valve cover, wherein the upper valve cover covers the top of the cavity wall, and the lower valve cover covers the bottom of the cavity wall; the shaft body comprises an upper shaft and a lower shaft, the upper shaft penetrates through the upper valve cover, and the bottom end of the upper shaft is fixedly connected with the top of the plug body; a packing sealing structure is arranged between the upper shaft and the upper valve cover, and a first O-shaped sealing ring is arranged between the packing sealing structure and the upper shaft; the lower shaft is arranged on the lower valve cover and is rotationally connected with the plug body through the lower valve cover; a second O-shaped sealing ring and a gasket are arranged between the lower shaft and the lower valve cover; a third O-shaped sealing ring is arranged between the side surface of the plug body and the cavity wall.

Preferably, the motor is connected with the upper shaft through the worm gear box, and the worm gear box is a large-torque worm gear box.

Preferably, the spray gun device comprises a material cylinder, a material inlet, a material outlet, a nozzle and a gas jet system; the feed inlet is arranged on the material cylinder and is connected with the outlet of the flow dividing valve through the branch pipeline; the discharge port is arranged at one end part of the material cylinder, and the nozzle is arranged at the inner side of the edge of the discharge port; the gas outlet end of the gas jet system is connected with the nozzle, and the gas jet system is used for providing atomized gas which has jet impact on materials.

Preferably, the nozzles are plural; the nozzles are circumferentially distributed on the inner side of the discharge hole; the nozzles are positioned at the lower part of the discharge hole and are positioned in a range of an included angle of-75 degrees to 75 degrees with the vertical symmetry axis of the discharge hole.

Preferably, each branch pipe is further provided with a gate valve.

Preferably, a high-temperature camera and a temperature sensor are further arranged in the furnace body, the high-temperature camera is used for acquiring the combustion condition of the furnace body and the material accumulation condition of each layer on the ladder, and the temperature sensor is used for monitoring the temperature in the furnace body.

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

according to the system for feeding dangerous waste into the kiln through multipoint atomization, the splitter valve is arranged on the main pipeline behind the solid pump, and the scheme of feeding dangerous waste into the kiln through multipoint is realized by reversing the splitter valve, so that the capacity of the SMP system can be fully exerted through multipoint kiln feeding.

According to the system for atomizing dangerous waste into the kiln at multiple points, disclosed by the invention, the spray gun device is adopted to atomize dangerous waste for the first time, atomized materials are sent to the step furnace, air cannons on each step on the step furnace are used for carrying out secondary atomization, the problems of skinning and blockage at the outlet of the spray gun and exceeding standard of CO emission fluctuation are solved through the secondary atomization, and meanwhile, the CO-treatment amount is improved to 6t/h, so that a theoretical basis is provided for developing multi-point kiln entering research in the future.

Drawings

FIG. 1 is a schematic diagram of a system for multiple point atomization of hazardous waste into a kiln according to an embodiment of the present invention;

FIG. 2 is a longitudinal cross-sectional view of a diverter valve in a system for multiple point atomization of hazardous waste into a kiln in accordance with an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a diverter valve in a system for multiple point atomization of hazardous waste into a kiln in accordance with an embodiment of the present invention;

FIG. 4 is a schematic diagram of the structure of a diverter valve and a gate valve in a system for multipoint atomization of hazardous waste into a kiln according to an embodiment of the invention;

FIG. 5 is a schematic view of the structure of a spray gun device in a system for multipoint atomization of hazardous waste into a kiln according to an embodiment of the present invention;

FIG. 6 is a gas jet flow chart formed when 1 nozzle is arranged at the middle part of the bottom of a discharge hole in a spray gun device in a system for multi-point atomization of hazardous waste into a kiln according to the embodiment of the invention;

FIG. 7 is a gas jet diagram formed when 2 20-degree elbow nozzles are symmetrically arranged in the middle of a discharge hole in a spray gun device in a system for multi-point atomization of hazardous waste into a kiln according to the embodiment of the invention;

FIG. 8 is a gas jet diagram formed when 2 20-degree elbow nozzles are symmetrically arranged at the upper part of a discharge hole in a spray gun device in a system for multi-point atomization of hazardous waste into a kiln according to the embodiment of the invention;

FIG. 9 is a gas jet diagram of 5 nozzles in a spray gun device in a system for multipoint atomizing hazardous waste into a kiln according to an embodiment of the present invention, which simultaneously impact jet streams on materials;

fig. 10 is a front view of a lance apparatus in a system for multipoint atomizing hazardous waste into a kiln in accordance with an embodiment of the present invention.

Wherein: 1-a diverter valve; 2-an atomizing device; 201-an atomizing device; 202-an atomizing device; 3-solid pump; 4-a main pipeline; 5-branch pipeline; 6-a cement kiln pre-decomposing furnace; 601-a cement kiln pre-decomposing furnace; 602-a cement kiln pre-decomposing furnace; 7-a spray gun device; 8-step furnace; 801-furnace body; 802-ladder; 803-an air inlet pipe; 804-air cannon; 805-high temperature cameras; 806-a temperature sensor; 9-a valve body; 10-a plug body; 11-valve seat; 12-a shaft body; 13-valve cavity; 14-an inlet channel; 15-a first outlet channel; 16-a second outlet channel; 17-gate valve; 18-plug body passageway; 19-a cavity wall; 20-an upper valve cover; 23-a lower valve cover; 24-upper shaft; 25-lower shaft; 26-a packing seal arrangement; 27-a first O-ring seal; 28-a second O-ring seal; 29-a gasket; 30-a third O-shaped sealing ring; 31-stuffing boxes; 32-packing; 33-packing press plate; 34-an electric motor; 35-worm gear case; 36-material cylinder; 37-a feed inlet; 38-a discharge hole; 39-nozzles; 40-a crusher; 41-a mixer.

Detailed Description

The technical solutions of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Example 1

As shown in fig. 1, a system for multi-point atomization of hazardous waste into a kiln according to this embodiment includes:

a crushing-mixing-pumping system, a diverter valve 1 and a plurality of sets of atomizing devices 2; the discharge port of a solid pump 3 of the crushing-mixing-pumping system is connected with the inlet of a diverter valve 1 through a main pipeline 4, each outlet of the diverter valve 1 is connected with the inlet of one set of atomizing devices 2 through a branch pipeline 5, and the outlet of each set of atomizing devices 2 is connected with a cement kiln pre-decomposition furnace 6;

the atomizing device 2 comprises a spray gun device 7 and a step furnace 8; the step furnace 8 comprises a furnace body 801, steps 802, an air inlet pipe 803 and a plurality of air cannons 804; the ladder 802 is arranged in the furnace body 801; a plurality of air cannons 804 are arranged on the vertical surface of each layer of the ladder 802; the air inlet pipe 803 is connected with the side wall of the top of the furnace body 801; the feed inlet of the spray gun device 7 is connected with the outlet of the diverter valve 1 through a branch pipeline 5, and the discharge outlet of the spray gun device 7 is connected with the feed inlet at the top of the furnace body 801; a discharge hole at the bottom of the furnace body 801 is connected with a cement kiln pre-decomposition furnace 6; the spray gun device 7 is used for primary atomization of hazardous waste, and the air cannon 804 is used for secondary atomization of hazardous waste.

The invention relates to a system for atomizing dangerous waste into a kiln in a multipoint manner, which comprises the following working processes: firstly, dangerous wastes such as an iron bucket filled with distillation residues, a plastic bucket filled with organic solution, sludge and the like enter a crushing-mixing-pumping system, are crushed and uniformly mixed, are conveyed by a solid pump, are conveyed to a diverter valve 1 by a main pipeline, are diverted by the diverter valve, are firstly conveyed to an atomizing device 2 connected with a first outlet of the diverter valve, are atomized by the atomizing device, and are then conveyed to a first cement kiln pre-decomposition furnace; after the direction of the flow dividing valve is switched, the material is conveyed into an atomizing device connected with a second outlet of the flow dividing valve, atomized and then conveyed into a second cement kiln pre-decomposing furnace; the direction of the flow dividing valve is switched again, the material is conveyed into an atomization device connected with a third outlet of the flow dividing valve, atomized and then conveyed into a third cement kiln pre-decomposing furnace …, and the quantity of cement kiln decomposing furnaces distributed according to the requirement can be realized by adjusting the quantity of outlets of the flow dividing valve.

Wherein, the specific working process of atomizing device does: the dangerous waste enters the spray gun device 7 for the first time, the atomized dangerous waste enters the step furnace and falls onto different steps of the step furnace, for example, 50% of the dangerous waste which is not completely atomized at one time of pumping quality falls onto the 9 th step and the 8 th step of the step furnace, 50% of the atomized dangerous waste falls onto the 7 th step to the 1 st step, hot air brought by the air inlet pipe is used for supporting combustion of the dangerous waste, after a certain period of combustion, the air cannons on the steps are used for carrying out the second atomization, the materials after the second atomization are brought into the cement kiln predecomposition furnace by upward hot air under the dual action of gravity and wind force, and unburnt heavy matters roll down to the lower step for continuous combustion; meanwhile, air jet flow generated by the air cannon disturbs materials to increase turbulence of gas in the furnace, so that combustion efficiency can be improved, hazardous waste can be helped to burn out quickly, and the heat value in the waste can be utilized more. The hazardous waste passes through the step furnace where it is burned for a period of time in each layer, and the steps ensure a long enough residence time so that the hazardous waste can burn off. Finally, a large amount of hot flue gas generated in the combustion process in the step furnace is brought into the pre-decomposition furnace under the action of gas sent by the air inlet pipe to be used as alternative fuel, so that the coal injection amount of the cement kiln can be reduced.

According to the system for feeding dangerous waste into the kiln through multipoint atomization, the splitter valve is arranged on the main pipeline behind the solid pump, and the scheme of feeding dangerous waste into the kiln through multipoint is realized by reversing the splitter valve, so that the capacity of the SMP system can be fully exerted through multipoint kiln feeding. Further, because the dangerous waste materials conveyed by the solid pump are in a section-by-section separated plunger shape when being sent out from the pipeline outlet, the plunger-shaped materials are directly conveyed into the cement kiln pre-decomposition furnace, and because the materials have high viscosity and poor fluidity, the materials cannot flow out of the pipeline, the pipeline outlet materials are hardened at first under the action of high temperature, the pipeline outlet is blocked, and the pasty materials cannot be fully combusted when entering the pre-decomposition furnace, so that the problems of exceeding of the standard of CO emission fluctuation of a cement kiln system and low treatment quantity of the dangerous waste cooperatively treated by the cement kiln in the pumping process are caused. According to the system for atomizing the dangerous waste into the kiln at multiple points, disclosed by the invention, the spray gun device is adopted to atomize the dangerous waste for the first time, the atomized materials are sent to the step furnace, the air cannon on each step on the step furnace is used for carrying out the second atomization, the dangerous waste can be prevented from blocking the outlet of the pipeline after the two atomization, the combustion of the dangerous waste is more sufficient, and the disposal quantity of the dangerous waste cooperatively disposed in the cement kiln is improved.

According to the system for feeding dangerous waste into the kiln through multipoint atomization, a plurality of branch pipelines connected behind the diverter valve can be respectively connected with a plurality of cement kiln pre-decomposition furnaces, and also can be connected with a plurality of different feeding sites on the same cement kiln pre-decomposition furnace.

In some embodiments, the crush-mix-pump system comprises a crusher 40, a mixer 41, and a solid pump, wherein a discharge port of the crusher 40 is connected to a feed port of the mixer 41, and a discharge port of the mixer 41 is connected to a feed port of the solid pump.

In some embodiments, the diverter valve may be a three-way, four-way, or the like diverter valve with different outlets. Preferably, the diverter valve 1 is a three-way diverter valve; the system for multi-point atomization of hazardous waste into a kiln includes two sets of atomization devices 201, 202. Two outlets of the diverter valve are respectively connected with the feed inlets of the spray gun devices of the atomization devices 201 and 202 through branch pipelines, and the discharge outlets of the step furnaces of the atomization devices 201 and 202 are respectively connected with the cement kiln pre-decomposition furnaces 601 and 602.

In some embodiments, as shown in fig. 2 and 3, the diverter valve 1 includes a valve body 9, a plug body 10, a valve seat 11, and a shaft body 12; the valve body 9 is provided with a valve cavity 13, an inlet channel 14, a first outlet channel 15 and a second outlet channel 16, and the inlet channel 14, the first outlet channel 15 and the second outlet channel 16 are communicated with the valve cavity 13; the plug body 10 is rotatably arranged in the valve cavity 13 through the shaft body 12; the inlet channel 14, the first outlet channel 15 and the second outlet channel 16 are respectively provided with a valve seat 11 which is matched and sealed with the plug body 10; the angle between the central axis of the inlet channel 14 and the central axis of the first outlet channel 15 is 130 ° -150 °; the angle between the central axis of the inlet channel 14 and the central axis of the second outlet channel 16 is 130 ° -150 °; the plug body 10 is provided with a plug body channel 18 penetrating through the plug body, the central axis of the plug body channel 18 is arc-shaped, and when one end of the plug body channel 18 is communicated with the inlet channel 14, the other end of the plug body channel 18 is communicated with the first outlet channel 15 or the second outlet channel 16. In the system for atomizing dangerous waste into the kiln at multiple points, the diverter valve is switched by adopting the large angle of 130-150 degrees of rotation of the plug body, the inlet channel and the outlet channel are communicated through the plug body channel, the formed material flow channel has smooth transition, and for solid dangerous waste containing substances such as iron sheets, plastic skins, woven bags and the like, the material can be conveyed more smoothly, and the diverter valve is not easy to be blocked by solid dangerous waste.

Further preferably, the central axis of the inlet channel 14 is at an angle of 140 ° to the central axis of the first outlet channel 15; the central axis of the inlet channel 14 is at an angle of 140 deg. to the central axis of the second outlet channel 16.

Specifically, the plug body 10 is cylindrical.

In some embodiments, the outer surface of the plug body is surfacing wear resistant material; the wear-resistant material is deposited on the contact part of the valve seat and the plug body, so that the abrasion of sharp solid wastes such as iron sheets, plastic skins and the like to the valve body and the plug body can be slowed down, and the service life of the flow dividing valve is prolonged. The plug body is in clearance fit with the valve body, and the clearance between the plug body and the valve body is 0.1-0.25mm. So as to prevent impurities from being mixed and blocked between the gap between the plug body and the valve body.

In some embodiments, the valve chamber 13 includes a chamber wall 19, an upper valve cap 20, and a lower valve cap 23, the upper valve cap 20 covering the top of the chamber wall 19, the lower valve cap 23 covering the bottom of the chamber wall 19; the shaft body 12 comprises an upper shaft 24 and a lower shaft 25, the upper shaft 24 penetrates through the upper valve cover 20, and the bottom end of the upper shaft is fixedly connected with the top of the plug body 10; a packing sealing structure 26 is arranged between the upper shaft 24 and the upper valve cover 20, a first O-shaped sealing ring 27 is arranged between the packing sealing structure 26 and the upper shaft 24, and the upper shaft and the upper valve cover are sealed by the O-shaped sealing ring and packing in a double manner, so that hazardous wastes in the valve cavity can be prevented from leaking. The lower shaft 25 is arranged on the lower valve cover 23 and penetrates through the lower valve cover 23 to be connected with the plug body 10 in a rotating way; a second O-shaped sealing ring 28 and a gasket 29 are arranged between the lower shaft 25 and the lower valve cover 23, and the hazardous waste can be prevented from leaking through double sealing of the O-shaped sealing ring and the gasket between the lower shaft and the lower valve cover. A third O-ring 30 is arranged between the side surface of the plug body 10 and the cavity wall 19, and the plug body and the cavity wall of the valve cavity are preliminarily sealed by adopting the O-ring, so that a large amount of medium can be prevented from entering the cavity between the plug body and the valve cavity. Through the mutual matching of the sealing structures, the sealing performance of the flow dividing valve can be greatly improved.

In some embodiments, the packing seal structure 26 includes a packing box 31, a packing 32, and a packing platen 33, the packing 32 being disposed between the packing box 31 and the upper shaft 24, the packing platen 33 being snap-fit on top of the packing box 31. In the packing sealing structure, the packing can be replaced, and the packing can be pre-tightened on line by adjusting the packing pressing plate.

In some embodiments, the plug body and the valve seat are matched and ground after being processed, so that the sealing effect is ensured.

In some embodiments, the diverter valve further includes a motor 34 and a worm gear case 35, the upper shaft 24 being connected to the motor 34 by the worm gear case 35, the worm gear case 35 being a high torque worm gear case. The quick reversing of the diverter valve can be realized through an electric executing device consisting of a motor and a worm gear case; the adoption of the large-torque worm gear case can ensure flexible and reliable switching, flexible switching and no blocking.

In some embodiments, as shown in fig. 5, the spray gun apparatus 7 includes a cylinder 36, a feed opening 37, a discharge opening 38, a nozzle 39, and a gas jet system; the feed inlet 37 is arranged on the material cylinder 36, and the feed inlet 37 is connected with the outlet of the diverter valve 1 through a branch pipeline; the discharge port 38 is arranged at one end part of the material cylinder 36, and the nozzle 39 is arranged at the inner side of the edge of the discharge port 38; the gas outlet end of the gas jet system is connected with the nozzle 39, and the gas jet system is used for providing atomized gas, and the atomized gas plays a role in jet impact on materials. Dangerous waste is shunted by a solid pump through a shunt valve and then is pumped into a material cylinder of the spraying device through a material inlet, the dangerous waste is pushed forward to a material outlet under the pumping of the solid pump, a gas jet system is opened, atomized gas is sprayed, and the dangerous waste is atomized through jet impact.

In some embodiments, the nozzles 39 are multiple; the plurality of nozzles 39 are circumferentially arranged inside the discharge opening. When the first atomization treatment is carried out, the number of the nozzles which are started can be selected according to the characteristics of the dangerous waste to be treated so as to optimize the atomization characteristics of the materials.

In some embodiments, the plurality of nozzles 39 are located in a lower portion of the discharge port 38 and are located within a range of-75 ° to 75 ° from the vertical symmetry axis of the discharge port. Based on the fluidity and the repose angle of the materials, the outflow part of the hazardous waste is concentrated at the lower part of the spray gun, and the range of 150 degrees of the lower part of the discharge hole (namely the range of an included angle of-75 degrees to 75 degrees with the symmetry axis of the vertical direction of the discharge hole) is measured, so that an eccentric design is adopted, and a certain number of nozzles are only required to be installed in the range of 150 degrees of the lower part of the discharge hole.

In some embodiments, the nozzle 39 is embodied as a straight-through gas tube. Because the material is sticky and is easy to block after being subjected to high temperature, the nozzles are all through air pipes for cleaning conveniently.

In some embodiments, the plurality of nozzles 39 are symmetrically arranged about a vertical axis of symmetry of the discharge port.

Further preferably, the plurality of nozzles are arranged at equal intervals in the circumferential direction of the discharge port.

In some embodiments, as shown in fig. 1 and 4, a gate valve 17 is further provided on each branch pipe. When the diverter valve is overhauled, the gate valves on the two branch pipelines can be closed, so that material backflow during overhauling is avoided.

In some embodiments, the nozzle on the vertical symmetry axis of the discharge port is a straight tube; the nozzles positioned on two sides of the vertical symmetry axis of the discharge hole comprise a straight pipe section and a bent pipe section, the bent pipe section is connected with the front end of the straight pipe section, and the bent pipe section is horizontally bent for 20 degrees relative to the straight pipe section towards the vertical symmetry axis of the discharge hole. The middle nozzle adopts a straight pipe, and the nozzles at the two sides adopt the end heads to horizontally incline 20 degrees towards the center of the discharge hole, so that fan-shaped distribution is formed.

According to the system for atomizing dangerous waste into the kiln at multiple points, the spray nozzles arranged on the spray gun device adopt the structure and the arrangement mode, so that the staggered layered three-dimensional impact jet flow effect can be obtained. Specifically, taking a spray gun structure with 5 nozzles arranged on a discharge hole as an example, the gas jet is in a conical shape due to the circular air pipe outlet of the straight air pipe, and the conical area of a single gas jet is simulated at the 5 nozzle outlets. As shown in fig. 6, the gas jet flow chart is formed when 1 nozzle is arranged at the middle part of the bottom of the discharge hole, and the nozzle directly performs impact jet flow on the material at the bottom to form a single jet flow area. As shown in FIG. 7, for the gas jet diagram formed when 2 20-degree elbow nozzles are symmetrically arranged in the middle of the discharge hole, 2 20-degree elbow nozzles perform impact jet flow in the middle, and 2 gas jets collide obliquely, so that a free jet flow area and an impact area are formed. As shown in fig. 8, the gas jet flow diagram formed when 2 20-degree elbow nozzles are symmetrically arranged at the upper part of the discharge hole, the 2 20-degree elbow nozzles perform impact jet flow at the upper part, and 2 gas streams collide obliquely, so that a free jet flow area and an impact area are also formed. The materials which are not atomized at the middle part and the high part can finally flow to the bottom of the spray gun due to the fluidity of the materials, and are atomized through the bottom nozzle. As shown in fig. 9, for a gas jet graph formed by 5 nozzles impinging jet on material simultaneously, it can be seen that the gas jet is able to fully cover the material at the location of the outlet, forming staggered layered stereoscopic impinging jet of free jet zone, converging zone and impingement zone.

In some embodiments, the gas jet system includes an atomization gas source, a flow meter, a pressure gauge, a distribution valve, and a control valve; the air outlet of the atomization air source is connected with the air inlet of the distribution valve through a main air pipe; the distribution valve comprises a plurality of air outlets, and each air outlet of the distribution valve is connected with one nozzle through a bronchus; the main air pipe is provided with a flowmeter and a pressure gauge; each bronchus is provided with a control valve. The flow of atomized gas generated by the atomized gas source is controlled by a flowmeter on the main gas pipe, then the main gas pipe is divided into a plurality of branches through a distribution valve, and each branch gas pipe is respectively provided with a control valve for controlling the on and off of a single branch gas pipe, so that the number of enabled nozzles is adjusted. Taking 5 nozzles as an example at the discharge hole of the spray gun, the middle lower part of the spray gun is symmetrically provided with 5 nozzles, as shown in fig. 10, the nozzles are respectively marked as a, b, c, d, e, wherein an air pipe e is positioned on a symmetrical axis in the vertical direction of the discharge hole, when 1 nozzle is selected to be started, a control valve on a bronchus connected with the nozzle e is opened, and a control valve on a bronchus connected with the nozzle a, b, c, d is closed. When 2 nozzles are selected to be started, the control valves of the nozzles c and d are opened, and the control valves of other nozzles are closed. When 3 nozzles are selected to be started, the control valves of the nozzles c, d and e are opened, and the control valves of other nozzles are closed. When 5 nozzles are selected to be activated, the control valves of the nozzles a, b, c, d, e are all opened.

The atomizing gas source may be any of a variety of devices that can provide a gas, such as an air compressor. The control valve can be a manual or electric control valve, and can be a manual ball valve.

In some embodiments, the furnace body 801 of the step furnace is cast from refractory material. Specifically, the number of steps arranged in the furnace body can be selected according to actual conditions, the height and the width of each step can be adjusted according to actual conditions, for example, the height of each step can be set to 300mm, and the width can be set to 500mm.

In some embodiments, the air inlet duct 803 of the step furnace is a branch duct introduced by the tertiary air duct of the cement kiln.

In some embodiments, an adjusting valve is further arranged on the air inlet pipe 803, so that the flow rate of the tertiary air can be adjusted.

In some embodiments, a high-temperature camera 805 and a temperature sensor 806 are further provided in the furnace 801, where the high-temperature camera 805 is used to obtain the combustion condition in the furnace and the material stacking condition of each layer on the steps, so that the steps with more stacked materials can be manually controlled to continuously atomize the air cannon. Specifically, the high-temperature camera can adopt a GS-JT11-2 DEG high-temperature camera. The temperature sensor is used for monitoring the temperature in the furnace body, so that the heat value of the compatible materials is adjusted at any time by combining the combustion video and the temperature change, and the temperature in the furnace is ensured to be within a set value range. Specifically, the temperature sensor can adopt a WNK-WRN-430 1000 ℃ K type wear-resistant thermocouple.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.

Claims

1. A system for multiple point atomization of hazardous waste into a kiln, comprising:

2. The system for multiple point atomization of hazardous waste into a kiln of claim 1, wherein:

the diverter valve is a three-way reversing valve; the system for multi-point atomization of the hazardous waste into the kiln comprises two sets of atomization devices.

3. The system for multiple point atomization of hazardous waste into a kiln of claim 2, wherein:

the diverter valve comprises a valve body, a plug body, a valve seat and a shaft body; the valve body is provided with a valve cavity, an inlet channel, a first outlet channel and a second outlet channel, and the inlet channel, the first outlet channel and the second outlet channel are communicated with the valve cavity; the plug body is rotatably arranged in the valve cavity through the shaft body; valve seats matched and sealed with the plug body are arranged in the inlet channel, the first outlet channel and the second outlet channel; the included angle between the central axis of the inlet channel and the central axis of the first outlet channel is 130-150 degrees; the included angle between the central axis of the inlet channel and the central axis of the second outlet channel is 130-150 degrees; the plug body is internally provided with a plug body channel penetrating through the plug body, the central shaft of the plug body channel is arc-shaped, and when one end of the plug body channel is communicated with the inlet channel, the other end of the plug body channel is communicated with the first outlet channel or the second outlet channel.

4. A system for multiple point atomization of hazardous waste into a kiln in accordance with claim 3, wherein:

the outer surface of the plug body is overlaid with wear-resistant materials; the contact part of the valve seat and the plug body is overlaid with wear-resistant materials; the plug body is in clearance fit with the valve body, and the clearance between the plug body and the valve body is 0.1-0.25mm.

5. A system for multiple point atomization of hazardous waste into a kiln in accordance with claim 3, wherein:

the valve cavity comprises a cavity wall, an upper valve cover and a lower valve cover, the upper valve cover is covered on the top of the cavity wall, and the lower valve cover is covered on the bottom of the cavity wall; the shaft body comprises an upper shaft and a lower shaft, the upper shaft penetrates through the upper valve cover, and the bottom end of the upper shaft is fixedly connected with the top of the plug body; a packing sealing structure is arranged between the upper shaft and the upper valve cover, and a first O-shaped sealing ring is arranged between the packing sealing structure and the upper shaft; the lower shaft is arranged on the lower valve cover and is rotationally connected with the plug body through the lower valve cover; a second O-shaped sealing ring and a gasket are arranged between the lower shaft and the lower valve cover; a third O-shaped sealing ring is arranged between the side surface of the plug body and the cavity wall.

6. The system for multiple point atomization of hazardous waste into a kiln of claim 5 wherein:

the motor is connected with the upper shaft through the worm gear box, and the worm gear box is a large-torque worm gear box.

7. The system for multiple point atomization of hazardous waste into a kiln of claim 2, wherein:

the spray gun device comprises a material cylinder, a material inlet, a material outlet, a nozzle and a gas jet system; the feed inlet is arranged on the material cylinder and is connected with the outlet of the flow dividing valve through the branch pipeline; the discharge port is arranged at one end part of the material cylinder, and the nozzle is arranged at the inner side of the edge of the discharge port; the gas outlet end of the gas jet system is connected with the nozzle, and the gas jet system is used for providing atomized gas which has jet impact on materials.

8. The system for multiple point atomization of hazardous waste into a kiln of claim 7 wherein:

the number of the nozzles is multiple; the nozzles are circumferentially distributed on the inner side of the discharge hole; the nozzles are positioned at the lower part of the discharge hole and are positioned in a range of an included angle of-75 degrees to 75 degrees with the vertical symmetry axis of the discharge hole.

9. The system for multiple point atomization of hazardous waste into a kiln of claim 1, wherein:

and each branch pipeline is also provided with a gate valve.

10. The system for multiple point atomization of hazardous waste into a kiln of claim 1, wherein:

the high-temperature camera is used for acquiring the combustion condition of the furnace body and the material accumulation condition of each layer on the ladder, and the temperature sensor is used for monitoring the temperature in the furnace body.