WO2020118756A1

WO2020118756A1 - Inflammable waste combustion and disposal device

Info

Publication number: WO2020118756A1
Application number: PCT/CN2018/122629
Authority: WO
Inventors: 史艳磊; 孙聂枫; 孙同年; 刘惠生; 王书杰; 邵会民; 付莉杰; 王阳; 李晓岚; 赵红飞; 李亚旗; 张鑫; 姜剑
Original assignee: 中国电子科技集团公司第十三研究所
Priority date: 2018-12-13
Filing date: 2018-12-21
Publication date: 2020-06-18
Also published as: CN109373333B; CN109373333A; EP3693662A1; EP3693662A4; EP3693662B1

Abstract

The invention provides an inflammable waste combustion and disposal device, and belongs to the technical field of environmental protection apparatuses. The employed technical solution is the inflammable waste combustion and disposal device, comprising a pressure vessel (1) provided with a feed port (1-1) and an auxiliary oxygen supply system. A combustion system, a comburent absorption cell (6), and an absorption liquid replenishment system (6-2) are provided in the cavity of the pressure vessel (1). A discharge outlet (6-1) is provided at the bottom of the comburent absorption cell (6). A circulating water cooling system is further provided outside the cavity of the pressure vessel (1).

Description

Combustible waste burning treatment device

Technical field

The invention relates to the technical field of environmental protection equipment, in particular to a combustible waste combustion treatment device.

Background technique

In industrial production, it is inevitable to generate more combustible wastes, such as phosphorus, arsenic, sulfur, carbon, etc. In some production lines, the generation of combustible wastes poses a greater threat to safe production, and its handling is a more difficult matter. In the production of semiconductors, the treatment of phosphorus and phosphorus-containing waste has always been a difficulty. The current mainstream treatment method is to place phosphorus and phosphorus-containing waste in a combustion tower for combustion treatment, because a large amount of Soot particles are generally followed by adsorption and dust reduction treatment after combustion, and the soot particles are passed through activated carbon or a spray-type exhaust gas treatment system. The following drawbacks are currently highlighted in this treatment method: First, the phosphorus-containing substances burn violently and will generate a large amount of soot in a moment. It is difficult for the activated carbon and the spray system to be completely adsorbed in a short time, resulting in the exhaust gas after treatment is difficult to achieve emissions Standards pollute the environment. The second is the large area of the combustion tower of the processing equipment, and the need for exhaust gas and exhaust gas treatment systems for co-processing, the cost remains high. Therefore, a more efficient processing device is needed.

Summary of the invention

In order to solve the technical problems of existing combustible waste treatment equipment with high cost, large occupied space, and large exhaust pollution, the present invention provides a combustible waste treatment device, which uses controlled combustion in a closed pressure vessel and then collects it in an absorption tank. The technical solution for discharging the neutral salt solution realizes efficient and rapid treatment of combustible waste, and the equipment structure is simple, easy to control, and environmentally friendly.

The technical scheme adopted by the present invention is a combustible treatment device for flammable wastes, which includes a pressure vessel with a filler port and a matching oxygen supply system. The pressure vessel cavity is provided with a combustion system and a combustion positioned on the bottom surface A substance absorption tank and an absorption liquid replenishment system, a discharge port is provided at the bottom end of the combustion substance absorption pool, and a circulating water cooling system is also provided outside the pressure vessel cavity.

Further, the combustion system includes a crucible positioned by a support frame and a heating system disposed around the crucible. The gas outlet of the oxygen supply system is located above the crucible.

Further, a liquid leakage hole is provided at the bottom of the crucible, and the liquid leakage hole communicates with the combustible material absorption pool.

Further, the oxygen supply control system includes an oxygen supply pipe connected to the gas source, the outlet of the oxygen supply pipe extends into the pressure vessel cavity, and the oxygen supply pipe is provided with a pressure relief valve and a shut-off valve.

Further, the device is provided with an integrated control system, the support frame is provided with a weight sensor, the combustible absorption tank is provided with a matching liquid level detector and acidity detector, and the integrated control system collects the weight sensor, The signals of the liquid level detector and the acidity detector, and control the corresponding valve openings of the filling port, the absorption liquid replenishment system and the oxygen supply system to realize automatic processing.

Further, the device is also provided with a pressure control system, and the pressure control system includes a safety valve and a purge valve.

Further, a moving door is provided on one side of the pressure vessel. When the moving door is closed, the pressure vessel is sealed by means of a buckle and a sealing assembly.

Further, the pressure vessel is made of acid-alkali-resistant material or the inner surface is coated with a protective layer resistant to acid-alkali corrosion.

Further, the circulating water cooling system includes a circulating water inlet pipe sequentially connected to a water source of ≤40°C, a water cooling zone enclosed outside the pressure vessel cavity, and a circulating water return water pipe.

Further, the combustible waste is phosphorus, phosphorus-containing waste, arsenic, arsenic-containing waste, sulfur, and/or sulfur-containing waste, and the combustion absorbing tank contains an alkaline solution.

In the above technical solution, a flammable waste combustion treatment device is provided. The treatment device includes a pressure vessel, which is the main body for processing flammable waste. The pressure vessel is provided with a filler port and a supporting oxygen supply system, which is the key design of the present invention. The pressure vessel is also equipped with a circulating water cooling system, and the pressure vessel cavity is provided with a combustion system, a combustion substance absorption tank and an absorption liquid replenishment system. The combustion substance absorption tank contains an absorption liquid for absorbing combustion substances; a circulating water cooling system Used to take away the heat generated by the combustion reaction and reduce the temperature of the pressure vessel. When in use, the circulating water cooling system is turned on, and combustible waste enters the combustion system in the pressure vessel from the filler port, and the combustion is achieved with the cooperation of the oxygen supply system. The soot particles generated by the combustion are sealed in the pressure vessel, or gravity settling or The water vapor in the pressure vessel cavity is combined and eventually sinks into the combustible absorption tank. The bottom end of the combustible absorption tank is provided with a discharge port. When the absorption efficiency of the absorption liquid is insufficient, it can be discharged through the discharge port, and then the absorption liquid replenishes the absorption liquid.

The beneficial effects of the present invention are: the flammable waste combustion treatment device provided by the present invention can efficiently and quickly treat flammable wastes such as waste phosphorus and phosphorus-containing wastes, and achieve zero waste gas emission treatment; the waste is realized by oxygen supply pressure The processing speed of the device is controllable; the device is stable and easy to control during the processing process. It can add the to-be-processed material and alkaline solution online, and discharge the generated salt solution online to achieve continuous operation; the equipment covers a small area and has a structure Simple, easy to operate and control, the automatic control is realized in the further improved plan, with low cost and high industrial application value.

BRIEF DESCRIPTION

1 is a schematic structural view of a combustible waste combustion treatment device of the present invention;

In the picture: 1. Pressure vessel, 1-1, filling port, 1-2, moving door, 2. Circulating water cooling system, 2-1, circulating water inlet pipe, 2-2, water cooling zone, 2-3, circulating water Return water pipe, 3, crucible, 3-1, leakage hole, 3-2, support frame, 4, heating system, 5, oxygen supply pipeline, 5-1, gas outlet, 5-2, pressure reducing valve, 5 -3. Shut-off valve, 6. Combustion absorption tank, 6-1, discharge port, 6-2, absorption liquid replenishment system, 7, safety valve, 8, purge valve.

detailed description

The following specifically describes the structure and use method of a combustible waste combustion treatment device provided by the present invention with specific embodiments, but does not limit the protection scope of the present invention in any form.

Example 1

This embodiment provides a combustible treatment device for flammable waste. As shown in FIG. 1, the treatment device includes a pressure vessel 1. The pressure vessel is provided with a filler port 1-1 and a supporting oxygen supply system. The oxygen supply system includes Oxygen supply line 5 connected to the oxygen source, the oxygen supply line 5 is provided with a pressure reducing valve 5-2 and a shut-off valve 5-3, the pressure reducing valve 5-2 is used to control and stabilize the oxygen pressure in the pressure vessel 1 In order to control the combustion rate, the gas outlet 5-1 of the oxygen supply line 5 extends into the pressure vessel 1 cavity. A combustion system is provided in the cavity of the pressure vessel 1. The combustion system includes a crucible 3 positioned by a support frame 3-2 and a heating system 4 provided around the crucible 3, and the gas outlet 5-1 of the oxygen supply line 5 is located in the crucible 3 Above, the heating system 4 is used to heat the crucible 3, so as to ensure that the flammable waste in the crucible 3 can reach the ignition point and maintain the combustion state under the combustion of oxygen. Below the crucible 3, there is a combustible absorbing tank 6, the combustible absorbing tank is filled with an absorption liquid for absorbing the combustibles, and a discharge port 6-1 is provided at the bottom of the combustible absorbing tank 6, the absorbing liquid absorbs the combustibles to insufficient efficiency At the time, it can be discharged through the discharge port 6-1, and the combustion substance absorption tank 6 is provided with an absorption liquid replenishment system for replenishing the absorption liquid. In order to reduce the excessive heat generated by the combustion reaction in the pressure vessel 1 and reduce the temperature of the pressure vessel 1, a circulating water cooling system is provided outside the chamber of the pressure vessel 1, including a circulating water inlet pipe 2-1 connected in turn to a water source of ≤40°C. A water cooling zone 2-2 and a circulating water return pipe 2-3 enclosed outside the pressure vessel 1 cavity.

In order to avoid that the combustibles or the combustibles and the droplets combined with the water vapor in the cavity of the pressure vessel 1 settle into the crucible 3 to cover the waste to be burned and the processing is interrupted, the bottom of the crucible 3 is provided with a liquid leakage hole 3-1. The liquid leak hole 3-1 communicates with the combustible substance absorption tank 6.

In order to prevent the accidental excessive pressure in the pressure vessel 1 from causing danger, the device is also provided with a pressure control system, which includes a safety valve 7 and a bleed valve 8.

One side of the pressure vessel 1 is provided with a moving door 1-2. When the moving door 1-2 is closed, the pressure vessel 1 is sealed by means of a buckle and a sealing assembly, thereby ensuring that particles and the like generated after combustion overflow to The environment produces pollution, danger, etc. On the other hand, the setting of the mobile door 1-2 makes it easier to clean the crucible 3 and other operations.

The pressure vessel 1 selects the pressure-resistant material and thickness according to the processing volume and material performance parameters. In order to ensure the safety and life of the treatment device, the pressure vessel 1 is made of acid and alkali resistant, corrosion resistant materials or coated on the inner surface with acid and alkali resistance , A protective layer of corrosion resistance.

This treatment device is mainly used to treat combustible wastes such as phosphorus, phosphorus-containing waste, arsenic, arsenic-containing waste, arsenic, arsenic-containing waste, sulfur and/or sulfur-containing waste, etc. The matter settles into the combustibles absorption tank, or the combustibles combine with the water vapor in the pressure vessel 1 to form droplets and settle into the combustibles absorption pool to achieve harmless collection treatment. Take the treatment of waste phosphorus and phosphorus-containing waste as an example to illustrate the use of this treatment device:

(1) Charging: Under ordinary atmospheric pressure, open the moving door 1-2 of the pressure vessel 1, open the plate valve on the packing port 1-1, and pour the phosphorus-containing waste that needs to be burned into the crucible through the packing port 17 3. After filling, close the plate valve;

(2) Adding liquid: Open the valve on the absorption liquid replenishment system 6-2, and inject alkaline solution such as ammonia water or lime water into the combustible material absorption tank 6, and stop the injection after reaching the specified liquid level;

(3) Charge: Close the moving door 1-2, open the shut-off valve 5-3 on the oxygen supply line 5, adjust the pressure reducing valve 5-2 to the required pressure, generally 0.1-0.5MPa, this embodiment Control 0.1MPa;

(4) Open circulating water: open the circulating water cooling system;

(5) Combustion: turn on the heating system 4 and wait until the temperature in the crucible 3 reaches the ignition point of phosphorus, then phosphorus will start to burn;

(6) Adsorption and sedimentation: the products of phosphorus combustion diffuse in the pressure vessel 1, but there will not be any emissions. Under the action of gravity, a part of the combustion particles settle to the combustion absorption tank 6, due to the temperature in the pressure vessel 1 Higher, the water vapor pressure is larger, a part of the combustibles will combine with water vapor to form acid droplets and then settle to the combustibles absorption tank 6, and neutralize with the absorption liquid acid and alkali to form phosphate;

(7) Discharge: When the phosphorus-containing waste to be treated is processed or the absorption efficiency of the absorption liquid is insufficient, the pressure of the pressure reducing valve 5-2 is adjusted to 0.1MPa, and after the pressure in the pressure vessel 1 is stabilized, the discharge port 6-1 is opened The phosphate solution is discharged, and the absorption liquid is supplemented by the absorption liquid supply system 6-2, and the treatment is completed.

The pressure maintenance process during the process is as follows: the oxygen consumed by the combustion is continuously supplied by the oxygen supply system under the precise control of the pressure reducing valve to ensure the continuity of the combustion. On the other hand, because the pressure vessel 1 is in a normal pressure state before being sealed, The nitrogen in the air is always in the container, and there is no nitrogen consumption during the combustion process, and the atmosphere in the pressure vessel 1 is safe;

The process of online addition of waste and alkaline absorption liquid in the process of batching phosphorus-containing waste is as follows: adjust the pressure of the pressure reducing valve 5-2 to 0.1MPa, and after the pressure in the pressure vessel 1 stabilizes, open the air release valve 8, Then open the plate valve on the filler port 1-1, add the waste from the filler port 1-1 to the crucible 3, and close the plate valve, so as to realize the online addition of the waste to be treated; at the same time, it can be recharged by opening the absorption liquid System 6-2 valve mode, add absorption liquid online;

Example 2

On the basis of Example 1, a comprehensive control system is provided in the flammable waste combustion treatment device of this example, and a weight sensor is provided on the support 3-2 of the crucible 3, which can weigh the waste to be treated in the crucible 3 The combustor absorption tank 6 is equipped with a matching liquid level detector and acidity detector. The signal acquisition end of the integrated control system is connected to the weight sensor, liquid level detector and acidity detector, and the signal output end is respectively at the filler port 1 The valve on -1 and the valve on the absorption liquid replenishment system 6-2 are connected. When the weight of the crucible 3 is lower than the set lower limit, the integrated control system controls the valve on the packing port 1-1 to open the packing to the setting. Fixed range or high limit value; when the liquid level detector detects that the liquid level is too low or the acidity detector detects that the pH value is greater than the set value, the integrated control system controls the valve on the absorption liquid supply system 6-2 to open the absorption liquid To the high level of the liquid level to ensure higher absorption efficiency.

The processing device is also provided with a pressure sensor for detecting the pressure in the cavity, the signal acquisition end of the integrated control system is connected to the pressure sensor, and the signal output end is connected to the shut-off valve 5-3 and the pressure relief valve 5-2 on the oxygen supply pipeline 5 respectively To achieve constant pressure control in the pressure vessel 1.

The combustible waste treatment device of the present invention utilizes the characteristics of phosphorus, arsenic, sulfur, etc. that are easily combustible and the products are easily soluble in water, so that waste phosphorus and phosphorus-containing waste, etc. occur in the pressure vessel 1 with a constant pressure and proportion of oxygen Combustion reaction, and further settling, absorption until safe and harmless discharge, realized high-efficiency, zero waste gas waste dust treatment waste, and the safety is greatly improved, realized automatic control processing, easy to industrial application.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than limit it; although the present invention has been described in detail with reference to the preferred embodiments, persons of ordinary skill in the art should understand that: The specific embodiments of the invention are modified or some technical features are equivalently replaced; without departing from the spirit of the technical solutions of the present invention, they should be covered in the scope of the technical solutions claimed by the present invention.

Claims

A flammable waste combustion treatment device, including a pressure vessel (1) with a filler port (1-1) and a matching oxygen supply system, characterized in that a combustion system is provided in the pressure vessel (1) cavity 、Combustible material absorption tank (6) and absorption liquid replenishment system (6-2) positioned on the bottom surface, the bottom end of the combustible material absorption tank (6) is provided with a discharge port (6-1), a pressure vessel (1) There is also a circulating water cooling system outside the cavity.
The processing device according to claim 1, characterized in that the combustion system includes a crucible (3) positioned by means of a support frame (3-2) and a heating system (4) disposed around the crucible (3). The gas outlet (5-1) of the oxygen supply system is located above the crucible (3).
The processing device according to claim 2, characterized in that a liquid leakage hole (3-1) is provided at the bottom of the crucible (3), and the liquid leakage hole (3-1) and the combustible substance absorption tank (6) Connected.
The processing device according to claim 3, characterized in that the device is provided with an integrated control system, the support frame (3-2) is provided with a weight sensor, and the combustible absorption tank (6) is provided with a matching Liquid level detector and acidity detector, the integrated control system collects the signals of the weight sensor, liquid level detector and acidity detector, and controls the filling port (1-1), the absorption liquid replenishment system (6-2) and The corresponding valve opening of the oxygen supply system is automatically processed.
The treatment device according to claim 1, wherein the oxygen supply control system includes an oxygen supply line (5) connected to a gas source, and an air outlet (5-1) of the oxygen supply line (5) Reaching into the cavity of the pressure vessel (1), the oxygen supply line (5) is provided with a pressure reducing valve (5-2) and a shut-off valve (5-3).
The processing device according to claim 1, characterized in that the device is further provided with a pressure control system, and the pressure control system includes a safety valve (7) and a purge valve (8).
The processing device according to claim 1, characterized in that a moving door (1-2) is provided on one side of the pressure vessel (1), and the moving door (1-2) is closed by means of snaps and sealing when closed The assembly realizes the sealing of the pressure vessel (1).
The processing device according to claim 1 or 7, characterized in that the pressure vessel (1) is made of acid and alkali corrosion resistant material or the inner surface is coated with a protective layer resistant to acid and alkali corrosion.
The treatment device according to claim 1, characterized in that the circulating water cooling system includes a circulating water inlet pipe (2-1) sequentially connected to a water source of ≤ 40°C, and a body surrounding the pressure vessel (1) cavity Water cooling zone (2-2), circulating water return pipe (2-3).
The treatment device according to claim 1, wherein the combustible waste is phosphorus, phosphorus-containing waste, arsenic, arsenic-containing waste, sulfur and/or sulfur-containing waste, and the combustible absorption tank It contains alkaline solution.