Multi-element free radical catalytic oxidation device for removing organic pollutants in coal gasification slag
By using a multi-radical catalytic oxidation device, which employs a three-stage reaction tank, underwater aeration and mechanical stirring, and combined catalytic oxidation with hydrogen peroxide and ozone, the problem of removing organic pollutants from coal gasification slag has been solved. This achieves efficient and low-cost treatment, meets the environmental protection requirements for delamination grouting backfill, and promotes resource utilization and environmental protection.
Patent Information
- Application Number
- CN202520066510.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-13
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-01-13
AI Technical Summary
Existing coal gasification slag treatment processes are difficult to effectively remove organic pollutants, especially when used for delamination grouting backfilling. They cannot meet both environmental protection and engineering standards and pose an environmental pollution risk.
A multi-component free radical catalytic oxidation device is adopted, which uses a three-stage reaction tank, underwater aeration and mechanical stirring, and combined hydrogen peroxide and ozone catalytic oxidation. Combined with a slag-water separator and a chemical liquid reflux system, the catalytic oxidation process parameters are optimized to achieve efficient removal of organic pollutants.
It significantly improves the treatment effect of coal gasification slag, meets the environmental protection standards for delamination grouting backfill, reduces reagent consumption and operating costs, and achieves the dual goals of resource utilization and environmental protection.
Smart Images
Figure CN223819337U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to remove coal gasification slag multielement free radical catalytic oxidation device of organic pollutant, belong to coal gasification slag processing technical field. BACKGROUND
[0002] In the coal chemical industry, coal gasification technology as one of the key processes, its generated coal gasification slag not only quantity is huge, and the component is complex, contains inorganic minerals and various organic pollutants. With the increasingly stringent environmental regulations, the processing and disposal of coal gasification slag put forward higher requirements. Among them, the treated coal gasification slag is used for delamination grouting backfilling, which is an environmentally friendly and economic resource utilization method, but the premise is that the content of organic pollutants in coal gasification slag must be reduced to a very low level to meet the dual standards of engineering safety and environmental protection.
[0003] In the existing coal gasification slag treatment process, although some technologies can remove heavy metals and some organic pollutants, there are still deficiencies in removal efficiency and stability. Especially in the case of using treated coal gasification slag for delamination grouting backfilling, the control of organic pollutants is more stringent. Because the content of organic pollutants is too high, not only will affect the performance of grouting material, but also may cause long-term pollution to groundwater and soil, endangering the ecological environment. SUMMARY
[0004] The utility model aims at overcoming the deficiency in the prior art, and provides a multielement free radical catalytic oxidation device for removing organic pollutants in coal gasification slag. The device optimizes the catalytic oxidation process and technical means, effectively removes the organic pollutants in coal gasification slag, and meets the environmental protection standards and engineering requirements of delamination grouting backfilling.
[0005] To achieve the above-mentioned purpose, the utility model is adopted with the following technical scheme:
[0006] The utility model provides a multi -element free radical catalytic oxidation device of removal organic pollutant in coal gasification slag, including multi -element free radical catalytic oxidation reactor, the multi -element free radical catalytic oxidation reactor is connected with hydrogen peroxide storage medicine jar through dosing pipeline, and dosing pipeline is provided with dosing pump and dosing valve, the multi -element free radical catalytic oxidation reactor is assembled with agitator and flow guide tube, the multi -element free radical catalytic oxidation reactor pool bottom is provided with aeration device, the multi -element free radical catalytic oxidation reactor outside is provided with the air -blower, and the air -blower is connected with aeration pipeline through aeration pipeline, the multi -element free radical catalytic oxidation reactor's inlet is connected with external coal gasification slag through the inlet pipeline with the residue slurry pump, the multi -element free radical catalytic oxidation reactor's outlet is connected with residue water separator through residue water pipeline, the residue water separator's liquid backflow mouth is connected with the multi -element free radical catalytic oxidation reactor through the backflow pump, and the residue water separator export lower part is provided with coal gasification slag storage tank.
[0007] Further, the multi-element free radical catalytic oxidation reactor comprises a first-stage reaction tank, a second-stage reaction tank and a third-stage reaction tank.
[0008] Further, the multi-element free radical catalytic oxidation reactor is provided with a sludge hopper in slope shape on both sides of the bottom.
[0009] Further, the multi-element free radical catalytic oxidation reactor is connected with an ozone generator through an ozone pipeline, and the ozone generator is connected with an ozone tail gas destruction device.
[0010] Further, the aeration device comprises a plurality of gas distribution main pipes and gas distribution branch pipes arranged at the bottom of the multi-element free radical catalytic oxidation reactor.
[0011] Further, the residue water separator is provided with a flushing water pipeline at the top.
[0012] Compared with the prior art, the utility model has the advantages of:
[0013] Firstly, the multi-element free radical catalytic oxidation reactor in the utility model achieves complete mixing through underwater aeration and mechanical stirring, and the flow guide tube is arranged in the reactor, so that large-area three-dimensional circulation stirring can be realized when starting the stirring and aeration, and the reactor has the advantages of sufficient reaction, high efficiency, environmental protection and energy saving, etc.
[0014] Secondly, the multi-element free radical catalytic oxidation reactor is provided with a sludge discharge slope at the bottom, so that the deposited sludge generated in the reaction process can be conveniently and effectively removed, and the utility model has high practicability.
[0015] Thirdly, the liquid outlet of the residue water separator is connected with the backflow pipeline, the reagent liquid after the reaction is transported to the front end of the reactor through the backflow pump, the backflow frequency can be determined according to the processing scale and properties of the coal gasification slag, the reagent consumption can be effectively reduced, and reagent circulation is realized.
[0016] Four, the design of three-stage reaction in the multi-element free radical catalytic oxidation reactor can promote the full contact reaction of the coal gasification slag while ensuring the required residence time, and can significantly improve the treatment effect and resource utilization level of the coal gasification slag;
[0017] Five, the catalytic oxidation mode of hydrogen peroxide combined with ozone can effectively catalyze and oxidize the organic pollutants in the coal gasification slag, and by optimizing the catalytic process parameters and equipment selection, such as catalytic oxidation time, temperature, solid-liquid ratio, etc., the catalytic oxidation efficiency can be improved, the reagent consumption and operation cost can be reduced, the threat of the coal gasification slag to the environment can be reduced, the efficient removal of the organic pollutants in the coal gasification slag can be ensured, and the treated coal gasification slag can meet the environmental protection standards and engineering requirements of the delamination grouting backfill;
[0018] Six, when the solid-liquid separation machine is used for solid-liquid separation, the slag water separation machine is continuously washed with clean water to ensure that the residual reagent in the reacted coal gasification slag does not affect the subsequent disposal work, and the effectiveness and continuity of the treatment are ensured;
[0019] Seven, the treated coal gasification slag has good physical and chemical properties, and can realize the dual goals of resource utilization and environmental protection of the coal gasification slag. BRIEF DESCRIPTION OF DRAWINGS
[0020] The drawings constituting a part of the specification of the present application are used to provide a further understanding of the present application, and the schematic embodiments of the present application and the explanations thereof are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:
[0021] Figure 1 The overall schematic view of the multi-element free radical catalytic oxidation device for removing organic pollutants in coal gasification slag provided by the embodiment of the present application;
[0022] Figure 2 The process flow chart of the multi-element free radical catalytic oxidation device for removing organic pollutants in coal gasification slag provided by the embodiment of the present application;
[0023] Figure 3 The top view of the three-stage reactor pool of the multi-element free radical catalytic oxidation device for removing organic pollutants in coal gasification slag provided by the embodiment of the present application;
[0024] In the figure: 1, slurry pump; 2, hydrogen peroxide storage tank; 3, dosing pump; 4, dosing valve; 5, multi-radical catalytic oxidation reactor; 501, first-stage reaction tank; 502, second-stage reaction tank; 503, third-stage reaction tank; 6, agitator; 7, flow guide cylinder; 8, hopper; 9, ozone generator; 10, ozone tail gas destruction device; 11, sludge-water separator; 12, coal gasification sludge storage tank; 13, reflux pump; 14, air blower; 15, aeration device. DETAILED DESCRIPTION
[0025] The utility model will be explained in detail below with reference to the drawings and in combination with the embodiments. It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.
[0026] The following detailed description is exemplary description, which aims at providing further detailed description of the utility model. Unless otherwise specified, all the technical terms adopted in the utility model are the same as the meanings commonly understood by the general technical personnel in the field to which the utility model belongs. The terms used in the utility model are only for describing the specific embodiments, and are not intended to limit the exemplary embodiments according to the utility model.
[0027] Embodiment:
[0028] The embodiment discloses a multi-radical catalytic oxidation device for removing organic pollutants in coal gasification sludge, please refer to Figure 1 and Figure 3 , comprising a multi-radical catalytic oxidation reactor 5, an agitator 6, a flow guide cylinder 7 and an aeration device 15, the aeration device 15 is assembled at the bottom of the multi-radical catalytic oxidation reactor 5, is connected with the air blower 14 through the aeration pipeline and the valve arranged, the agitator 6 and the flow guide cylinder 7 are assembled in the multi-radical catalytic oxidation reactor 5, in the embodiment, the multi-radical catalytic oxidation reactor 5 is divided into a first-stage reaction tank 501, a second-stage reaction tank 502 and a third-stage reaction tank 503, the agitator 6 and the flow guide cylinder 7 are arranged in the middle of each reaction tank, the aeration device 15 is arranged at the bottom of each tank, and the inclined hopper 8 is arranged at the bottom of each stage reactor for sludge discharge. The aeration device 15 adopts a plurality of gas distribution main pipes and a plurality of gas distribution branch pipes, and the number is determined according to the scale of gasification sludge treatment.
[0029] The multi-radical catalytic oxidation reactor 5 is externally provided with a slurry pump 1, a hydrogen peroxide storage tank 2, an ozone generator 9, an ozone tail gas destruction device 10, a slurry-water separation machine 11 and a blower 14. The hydrogen peroxide storage tank 2 is connected with the multi-radical catalytic oxidation reactor 5 through a dosing pump 3, a pipeline and a dosing valve 4. The ozone generator 9 is connected with the multi-radical catalytic oxidation reactor 5 through an ozone pipeline. The ozone tail gas destruction device 10 is connected with the ozone generator 9 for processing ozone after reaction of the ozone generator 9. The slurry-water separation machine 11 is connected with a discharge port of the multi-radical catalytic oxidation reactor 5 through a slurry-water pipeline. A liquid backflow port of the slurry-water separation machine 11 is connected with the multi-radical catalytic oxidation reactor 5 through a backflow pump 13. A coal gasification slurry storage tank 12 is arranged below an outlet of the slurry-water separation machine 11.
[0030] The multi-radical catalytic oxidation reactor 5 is provided with a stirrer 6 at the top and an aeration pipeline at the bottom, and a flow guide cylinder 7 at the middle. When the multi-radical catalytic oxidation reactor 5 is started, the stirrer 6 works to generate hydraulic circulation. The blower 14 supplies air to the aeration device 15 at the bottom of the pool to form a complete mixing environment of slurry and liquid through aeration and stirring. The ozone generator 9 is started to supply ozone to the multi-radical catalytic oxidation reactor 5 to realize complete mixing of coal gasification slurry and liquid. The coal gasification slurry after catalytic oxidation is separated from water in the slurry-water separation machine 11 through a discharge pipeline. The treated coal gasification slurry is directly fed into a subsequent treatment unit or enters the coal gasification slurry storage tank 12 through gravity. A flushing water pipeline is arranged at the top of the slurry-water separation machine 11 to periodically flush the slurry-water separation machine 11. The amount of flushing water and the flushing time are set according to the treatment amount and specific properties of the coal gasification slurry. The catalyst used in this embodiment is hydrogen peroxide and ozone, which catalytically oxidize organic matters in the coal gasification slurry. The concentration of the oxidizing agent hydrogen peroxide is 1%-10%, the liquid-solid ratio of added hydrogen peroxide to the gasification slurry is 10:1, the oxidation time is 0.5-3h, and the pH is alkaline. The separated liquid is returned to the multi-radical catalytic oxidation reactor 5 through the backflow pump 13.
[0031] Please refer to Figure 2When the coal gasification slag is introduced into the inlet of the multi-radical catalytic oxidation reactor 5 through the slurry pump 1 and the inlet pipe, the dosing valve 4 is opened, the hydrogen peroxide solution is delivered from the storage tank 2 to the first-stage reactor 501 of the multi-radical catalytic oxidation reactor 5 through the dosing pump 3, the hydrogen peroxide solution is mixed with the coal gasification slag at a liquid-solid ratio of 10:1, the pH is kept alkaline, the stirrer 6 works in the draft tube 7 to promote the mixing of the coal gasification slag and the liquid medicine, the air blower 14 is connected to the aeration device 15 at the bottom of the multi-radical catalytic oxidation reactor 5 through the air blowing pipe, and the air is blown to the bottom of the tank through the aeration pipe, under the combined action of the stirrer 6 and the air blower 14, the circulation is generated in the multi-radical catalytic oxidation reactor 5, the coal gasification slag and the liquid medicine are fully mixed, the ozone generator 9 and the ozone tail gas destruction device 10 are started, the ozone is introduced into the third-stage reactor through the ozone pipe, the reacted ozone enters the ozone tail gas destruction device 10, and the catalytic oxidation duration is determined according to the specific properties of the introduced coal gasification slag.
[0032] After passing through the first-stage reactor 501, the coal gasification slag sequentially passes through the second-stage reactor 502 and the third-stage reactor 503, the slag slurry after complete catalytic oxidation is introduced into the inlet of the slag-water separator 11 through the discharge port and the discharge pipe, the coal gasification slag and the liquid medicine pass through the spiral separation section, the liquid medicine returns to the lower end of the spiral due to gravity, the coal gasification slag is transported to the top and gradually dried, the solid-liquid separation is realized, the treated gasification slag product is obtained, the continuous washing with clean water from the top of the slag-water separator 11 is carried out to ensure that the device continuously and effectively operates, and the separated hydrogen peroxide liquid medicine is returned to the front end of the multi-radical catalytic oxidation reactor 5 through the return pump 13 along the return pipe to realize the reuse of the liquid medicine and reduce the waste of the liquid medicine, thereby achieving good economic benefits.
[0033] The embodiment provides a high-efficiency and low-cost coal gasification slag multi-radical catalytic oxidation device, which has the following characteristics: 1. The catalytic oxidant can be accurately selected or designed to ensure that the organic pollutants in the coal gasification slag have high removal efficiency; 2. The catalytic oxidation efficiency is improved and the energy consumption is reduced by optimizing the catalytic process parameters such as catalytic oxidation time, temperature and solid-liquid ratio; 3. Advanced post-treatment technologies are integrated, such as using a slag-water separator for slag-water separation, to ensure that the treated coal gasification slag meets the environmental protection standards and engineering requirements of delamination grouting backfill. In summary, the catalytic oxidation process and technical means are innovated, the efficient removal of organic pollutants in the coal gasification slag is realized, the treated coal gasification slag meets or is better than the environmental protection standards of delamination grouting backfill, and the resource utilization and environmental protection of the coal gasification slag are promoted.
[0034] It is to be understood by those skilled in the art that the present application can be implemented by other embodiments without departing from the spirit or essential characteristics thereof. Therefore, the above disclosed embodiments are merely illustrative in all aspects and are not the only ones. All changes within the scope of the present application or within the scope equivalent to the present application are included in the present application.
[0035] It should be pointed out that: the above examples are used to illustrate the technical solutions of the present application, but not to limit it. Although the present application has been described in detail with reference to the above examples, those skilled in the art should understand that the specific embodiments of the present application can be modified or replaced equivalently without departing from the spirit and scope of the present application. Any modification or equivalent replacement without departing from the spirit and scope of the present application should be covered in the protection scope of the claims of the present application.
Claims
1. A multi-component free radical catalytic oxidation device for removing organic pollutants from coal gasification slag, characterized in that, The reactor includes a multi-component radical catalytic oxidation reactor (5), which is connected to a hydrogen peroxide storage tank (2) via a dosing pipeline equipped with a dosing pump (3) and a dosing valve (4). The reactor (5) is equipped with a stirrer (6) and a flow guide (7). An aeration device (15) is installed at the bottom of the reactor (5). A blower (14) is installed on the outside of the reactor (5). (14) is connected to the aeration device (15) through an aeration pipe. The feed port of the multi-component free radical catalytic oxidation reactor (5) is connected to the external coal gasification slag through a feed pipe with a slurry pump (1). The discharge port of the multi-component free radical catalytic oxidation reactor (5) is connected to the slag-water separator (11) through a slag-water pipe. The liquid return port of the slag-water separator (11) is connected to the multi-component free radical catalytic oxidation reactor (5) through a return pump (13). A coal gasification slag storage tank (12) is set below the outlet of the slag-water separator (11).
2. The multi-component free radical catalytic oxidation device for removing organic pollutants from coal gasification slag according to claim 1, characterized in that, The multi-component free radical catalytic oxidation reactor (5) includes a first-stage reaction tank (501), a second-stage reaction tank (502), and a third-stage reaction tank (503).
3. The multi-component free radical catalytic oxidation device for removing organic pollutants from coal gasification slag according to claim 1, characterized in that, The bottom of the multi-component free radical catalytic oxidation reactor (5) is provided with sloping mud hoppers (8) on both sides.
4. The multi-component free radical catalytic oxidation device for removing organic pollutants from coal gasification slag according to claim 1, characterized in that, The multi-radical catalytic oxidation reactor (5) is connected to an ozone generator (9) via an ozone pipeline, and the ozone generator (9) is connected to an ozone exhaust gas destruction device (10).
5. The multi-component free radical catalytic oxidation device for removing organic pollutants from coal gasification slag according to claim 1, characterized in that, The aeration device (15) includes several gas distribution main pipes and gas distribution branch pipes installed at the bottom of the multi-component free radical catalytic oxidation reactor (5).
6. The multi-component free radical catalytic oxidation device for removing organic pollutants from coal gasification slag according to claim 1, characterized in that, The top of the slag-water separator (11) is equipped with a flushing water pipe.