Phosphorus-containing waste solidification treatment system

Abstract

The utility model provides a phosphorus-containing waste solidification treatment system, which belongs to the technical field of hazardous waste solidification treatment and comprises a hydrolysis system, a concentration system, a solidification system and a waste gas treatment system, and the waste gas treatment system comprises a first waste gas treatment system and a second waste gas treatment system. The outlet end of the hydrolysis system is communicated with the inlet end of the concentration system through a pipeline and a pump, the outlet end of the concentration system is communicated with the inlet end of the curing system through a pipeline and a pump, waste gas outlets are formed in the hydrolysis system, the concentration system and the curing system respectively, and the waste gas outlets of the hydrolysis system and the concentration system are communicated with the first waste gas treatment system. The system is simple in structure and convenient to use and operate, phosphorus-containing waste is effectively and directly landfilled after being treated, the treatment process is environmentally friendly and harmless, the cost is low, and waste is treated with waste.

Description

TECHNICAL FIELD

[0001] The utility model relates to a solidification treatment system, concretely relates to a phosphorus-containing waste solidification treatment system, belongs to the field of hazardous waste solidification treatment technology. BACKGROUND

[0002] With the development of industry, the discharge of various phosphorus-containing compounds and organic matters pollutes the environment, and the pollutants have stable molecular structures and certain biological toxicity, and are difficult to remove by traditional wastewater treatment methods.

[0003] The phosphorus-containing waste liquid produced in the pesticide intermediate production process is hazardous waste, which has toxicity, reactivity and corrosivity, and the phosphorus-containing waste mainly includes the front fraction produced in the production process of pesticide intermediate methyl phosphite diethyl ester, the residue in the reaction kettle and the tank cleaning waste liquid, and the main components are phosphorus trichloride and methyl dichloride phosphorus.

[0004] On the one hand, when the material contains more organic phosphorus and organic chlorine elements, a large amount of flue gas containing P2O5 and HCl gas will be generated after high-temperature incineration, P2O5 has strong hygroscopicity and strong corrosion at high temperature, and hydrogen chloride gas becomes hydrochloric acid below the dew point temperature, which is a strong acid. These two substances have great damage to the incinerator, flue gas pipeline and flue gas purification equipment, greatly reducing the service life of refractory materials and equipment and increasing the operation and maintenance cost. Therefore, the phosphorus-containing and chlorine-containing waste liquid is not suitable for direct incineration treatment system.

[0005] On the other hand, the phosphorus-containing and chlorine-containing waste liquid produced by pesticide enterprises has reactivity because the substances such as phosphorus trichloride and methyl dichloride phosphorus in it can produce methanol and hydrochloric acid when reacting with water, and cannot be directly landfilled. Therefore, the treatment and disposal of the phosphorus-containing and chlorine-containing waste liquid currently faces great difficulties.

[0006] The current treatment method for the phosphorus-containing waste is to send it into a solidification device, add a solidification agent and a stabilizer to form a stable whole, and then fill it into a landfill for landfilling. A self-gluing solidification system for industrial solid waste in patent CN208583797U adopts calcination to form a gluing agent, and the other route is sent to a mixer to finally realize the mixing and solidification of industrial solid waste, the gluing agent, additives and auxiliary additives, and the solidification after filling improves the solidification efficiency and effect, and is simple to operate. However, the solidification system still needs to be calcined, the process is complex, and the calcination is extremely easy to corrode and damage the equipment for the waste liquid. The solidification is finally realized in the mixer, and the solidification is directly filled after the solidification. A waste solidification system in patent CN209591555 includes a solidification device, a waste conveying device, a first feeding device and a second feeding device. The waste conveying device conveys the waste to the solidification device. The first feeding device conveys the powdered cementing material to the solidification device. The stirring device mixes and stirs the waste and the cementing material in the solidification device. The second feeding device conveys the slurry-shaped cementing material to the solidification device to cover the mixture of the waste and the cementing material to complete the solidification. The system has the advantages of simple structure, simple operation and low cost. However, the solidification system only simply mixes and stirs, and adopts the commonly used cement for solidification.

[0007] The above are only simple solidification for the waste containing less harmful substances. The simple solidification for the phosphorus-containing waste cannot remove phosphorus, cannot be directly filled to cause pollution, and does not have a subsequent waste liquid and waste gas treatment system. The treatment of the phosphorus-containing waste is not complete, the environmental protection is poor, and the effect of waste treatment by waste is not achieved.

[0008] Therefore, it is a technical problem to be solved by those skilled in the art to develop a phosphorus-containing waste solidification treatment system which can overcome the above defects. Practical new type content

[0009] The technical problem to be solved by the present application is to overcome the defects of the prior art, provide a phosphorus-containing waste solidification treatment system, which has the advantages of simple structure, convenient operation, effective treatment of the phosphorus-containing waste for direct landfilling, harmless environmental protection in the treatment process, low cost and waste treatment by waste.

[0010] In order to solve the above technical problems, the present application provides a phosphorus-containing waste solidification treatment system, which comprises a hydrolysis system, a concentration system, a solidification system and a waste gas treatment system. The waste gas treatment system comprises a first waste gas treatment system and a second waste gas treatment system. The outlet end of the hydrolysis system is communicated with the inlet end of the concentration system through a pipeline and a pump. The outlet end of the concentration system is communicated with the inlet end of the solidification system through a pipeline and a pump. The hydrolysis system, the concentration system and the solidification system are respectively provided with waste gas outlets. The waste gas outlets of the hydrolysis system and the concentration system are communicated with the first waste gas treatment system. The waste gas outlet of the solidification system is communicated with the second waste gas treatment system.

[0011] The phosphorus-containing waste is sent to a hydrolysis system for hydrolysis, the hydrolyzed hydrolysis liquid is sent to a concentration system for concentration, waste gas generated by the hydrolysis system is sent to a first waste gas treatment system for treatment and then discharged, the concentrated liquid generated by the concentration system after concentration is sent to a solidification system for solidification by adding a solidification agent, waste gas generated by the concentration system is sent to the first waste gas treatment system for treatment and then discharged, and the solid waste generated by the solidification of the concentrated liquid in the solidification system is directly landfilled.

[0012] The further defined technical scheme of the utility model is:

[0013] Further, in the phosphorus-containing waste solidification treatment system, the hydrolysis system is a hydrolysis reactor, the hydrolysis reactor is connected with a water metering tank and a reagent storage tank through pipelines respectively, the inlet end of the hydrolysis reactor is connected with a stirring tank through a pipeline and a pump, the stirring tank is used for stirring the phosphorus-containing waste, and the waste gas outlet of the hydrolysis reactor is further connected with a condenser, and the waste gas is sent to the first waste gas treatment system for treatment after condensation by the condenser.

[0014] Technical effects, the utility model discloses a hydrolysis reactor, preferably a enamel hydrolysis reactor for hydrolysis reaction, the phosphorus-containing waste is disposed by hydrolysis to eliminate reactivity, meets the requirement of landfill site, and the waste gas outlet of the hydrolysis reactor is connected with a condenser, the waste gas is condensed first, the purpose of condensation is to condense the condensable gas in the waste gas, and the non-condensable gas needs to be treated in the subsequent waste gas treatment system, and the condensed gas can be recycled and reused, thereby reducing the cost, and the waste gas treatment is more thorough, the condensed liquid is transported to the calcium carbide slag pulping system by a pump, the waste is utilized, and the non-condensable gas is transported to the first waste gas treatment system for treatment by a vacuum pump and an induced draft fan.

[0015] In the phosphorus-containing waste solidification treatment system, the concentration system is a concentration kettle, the concentration kettle is externally connected with steam through a pipeline, and the waste gas outlet of the concentration kettle is further connected with a condenser, and the waste gas is sent to the first waste gas treatment system for treatment after condensation by the condenser.

[0016] Technical effects, the utility model externally connects steam on the concentration kettle, the steam in the concentration kettle is imported from the outside, the concentration kettle is a jacketed type, and mainly relies on the heat of steam for indirect heat exchange, so as to better complete the work.

[0017] The first waste gas treatment system comprises a carbide slag pulping system, a three-stage deacidification tower, a secondary activated carbon tank and an induced draft fan, the waste gas outlets of the hydrolysis reactor and the concentration kettle are communicated with the three-stage deacidification tower, the carbide slag pulping system is connected to the spray pipe of the three-stage deacidification tower through a pump and a pipeline, the carbide slag clear liquid in the carbide slag pulping system is used as the absorption liquid of the three-stage deacidification tower, the outlet of the three-stage deacidification tower is communicated with the secondary activated carbon tank, and the waste gas treated by the secondary activated carbon tank is discharged by the induced draft fan.

[0018] The condensate collected by the condensers on the hydrolysis reactor and the concentration kettle is pumped to the carbide slag pulping system.

[0019] The first waste gas treatment system is arranged, the waste gas of the hydrolysis reactor and the concentration kettle is treated, the acidic waste gas is absorbed, and then filtered, so that the discharged waste gas meets the standard, and the environment is prevented from being polluted.

[0020] The three-stage deacidification tower lower part neutralization tank is connected to the roller scraper dryer through a pump and a pipeline, and the roller scraper dryer is used for drying the liquid generated by deacidification of the three-stage deacidification tower.

[0021] The roller scraper dryer is arranged to dry the solution after deacidification, and the obtained calcium chloride can be used for other purposes, waste is utilized, and the cost is reduced.

[0022] The solidification system comprises a double-shaft mixer and a feeder, the feeder is used for adding a solidifying agent into the double-shaft mixer, the upper end of the double-shaft mixer is provided with a dust collection hood, and dust-containing waste gas is sent to the second waste gas treatment system through the dust collection hood and a pipeline.

[0023] The second waste gas treatment system comprises a bag-type dust collector, a first-stage deacidification tower, a first-stage activated carbon tank, an induced draft fan and a chimney, the double-shaft mixer is communicated with the inlet end of the bag-type dust collector through the dust collection hood and the pipeline, the outlet end of the bag-type dust collector is communicated with the first-stage deacidification tower, the first-stage deacidification tower is communicated with the inlet end of the first-stage activated carbon tank, and the outlet end of the first-stage activated carbon tank is communicated with the chimney by the induced draft fan to discharge the waste.

[0024] The bag-type dust collector is provided with a level meter and a vibrator at the ash bucket.

[0025] Technical benefits: This utility model incorporates a level gauge and a vibrator at the ash hopper of the bag filter, facilitating timely handling of dust in the ash hopper and ensuring thorough dust removal from the bag filter, thereby improving efficiency and guaranteeing the dust removal effect of the bag filter.

[0026] The beneficial effects of this utility model are:

[0027] This invention incorporates a hydrolysis system, a concentration system, a solidification system, and a waste gas treatment system. Phosphorus-containing waste is treated and dereactive through the hydrolysis system, meeting landfill entry requirements. The reduced-pressure concentration process, a volume reduction procedure, decreases subsequent landfill volume and lowers the capacity ratio, significantly increasing the amount of hazardous waste that can be placed in the same landfill, effectively reducing costs. Solidified waste can be directly landfilled without further treatment, simplifying process requirements and making it convenient to use. The resulting waste gas is treated by a dedicated waste gas treatment system, ensuring complete and harmless discharge and preventing environmental pollution. Furthermore, carbide slag is used in the waste gas treatment process, and condensate is used to create a carbide slag solution, achieving the effect of treating waste with waste.

[0028] This invention includes a calcium carbide slag slurry system. Calcium carbide slag is added to a feeder on a twin-shaft mixer. The slag is the waste residue primarily composed of calcium hydroxide after acetylene gas is obtained from the hydrolysis of calcium carbide. Acetylene (C2H2) is a crucial raw material in basic organic synthesis. The process of producing acetylene from calcium carbide (CaC2) using water (wet method) is simple and mature, and accounts for a significant proportion in my country. One ton of calcium carbide can produce over 300 kg of acetylene gas, while simultaneously generating 10 tons of industrial waste liquid with a solid content of approximately 12%, commonly known as calcium carbide slag slurry. This invention utilizes a large amount of calcium hydroxide with a dry basis content of [missing information]. 75% of the material is carbide slag. During solidification, carbide slag is used instead of limestone to make cement. Carbide slag is rich in calcium hydroxide and contains some pozzolanic active materials. It has a large specific surface area and fine particles. Its mechanical properties are significantly affected by the water content. The solidification mechanism is mainly based on the exchange between Ca2+ and metal ions in the waste, as well as the pozzolanic reaction generated under alkaline activation. These reactions help to improve the strength and stability of the waste. Adding carbide slag for solidification is a way to treat waste with waste and achieve resource utilization. During neutralization treatment, carbide slag is also used to replace the base, reducing the use of base and lowering disposal costs.

[0029] The second waste gas treatment system of this invention uses a bag filter to easily remove dust from the waste gas. The primary deacidification tower uses industrial water to absorb hydrogen chloride gas, and the resulting dilute hydrochloric acid is pumped to a hydrolysis reactor for deacidification while being recycled, thus reducing costs. This system completely treats phosphorus-containing waste before direct landfilling, and the waste gas and waste liquid generated during the treatment process are properly treated. The gas is directly discharged without polluting the environment, and the liquid is dried and reused. It boasts high treatment efficiency and is convenient to use.

[0030] The hydrogen chloride, methanol, dichloromethane, water vapor and the like mixed waste gas generated in the hydrolysis and concentration process is condensed through a condenser, the condensate is transported to an existing device for recycling through a pump, and the non-condensable gas is transported to a water washing tower and then to a 2-stage deacidification tower for washing and a 2-stage activated carbon tank for adsorption, and is discharged by a chimney after reaching the standard, so that the system is more environmentally friendly and safe.

[0031] The double-shaft mixer is prone to dust raising during operation, and a gas collecting hood needs to be arranged for collection, the waste gas is purified through a bag-type dust collector and then connected to a 1-stage deacidification tower for washing and a 1-stage activated carbon tank for purification and then discharged by a chimney, so that the system is more environmentally friendly and safe. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 A flow chart of the phosphorus-containing waste solidification treatment system according to the embodiment of the present application is shown in the figure.

[0033] Figure 2 A structure schematic view of the first waste gas treatment system in the embodiment of the present application is shown in the figure. Figure 1

[0034] Figure 3 A structure schematic view of the second waste gas treatment system in the embodiment of the present application is shown in the figure. Figure 1

[0035] In the figure: 1 - calcium carbide slag pulping system, 2 - 3-stage deacidification tower, 3 - 2-stage activated carbon tank, 4 - induced draft fan, 5 - roller blade dryer, 6 - bag-type dust collector, 7 - 1-stage deacidification tower, 8 - 1-stage activated carbon tank, 9 - chimney. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. The technical features involved in each embodiment of the present application described below can be combined with each other as long as they do not conflict with each other. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without making creative efforts fall within the scope of protection of the present application. Embodiment 1

[0037] The phosphorus-containing waste solidification treatment system provided in the embodiment is shown in the figure. Figure 1 ​​The hydrolysis system, the concentration system, the solidification system and the waste gas treatment system, the waste gas treatment system comprising a first waste gas treatment system and a second waste gas treatment system, the outlet end of the hydrolysis system being communicated with the inlet end of the concentration system through a pipeline and a pump, the outlet end of the concentration system being communicated with the inlet end of the solidification system through a pipeline and a pump, waste gas outlets being respectively arranged on the hydrolysis system, the concentration system and the solidification system, the waste gas outlets of the hydrolysis system and the concentration system being communicated with the first waste gas treatment system, and the waste gas outlet of the solidification system being communicated with the second waste gas treatment system;

[0038] The phosphorus-containing waste is sent to the hydrolysis system for hydrolysis, the hydrolyzed hydrolysis liquid is sent to the concentration system for concentration, the waste gas generated by the hydrolysis system is sent to the first waste gas treatment system for treatment and then discharged, the concentrated liquid generated by the concentration of the hydrolysis liquid is sent to the solidification system to add the solidification agent, i.e., the carbide slag, for solidification, and the waste gas generated by the concentration system is sent to the first waste gas treatment system for treatment and then discharged;

[0039] Specifically, the concentration system is a concentration kettle, the concentration kettle is externally connected with steam through a pipeline, and the waste gas outlet of the concentration kettle is further connected with a condenser, and the waste gas is sent to the first waste gas treatment system for treatment after being condensed by the condenser.

[0040] Specifically, the hydrolysis system is a hydrolysis reaction kettle, the hydrolysis reaction kettle is connected with a water metering tank and a medicament storage tank through pipelines respectively, the medicament storage tank is filled with hydrochloric acid, the waste gas outlet of the hydrolysis reaction kettle is further connected with a condenser, the waste gas is sent to the first waste gas treatment system for treatment after being condensed by the condenser, and the inlet end of the hydrolysis reaction kettle is connected with a stirring tank through a pipeline and a pump, the stirring tank is used for stirring the phosphorus-containing waste, and specifically:

[0041] The phosphorus-containing waste includes waste liquid and semi-solid waste residue, and is temporarily stored in a 20L or 200L barrel in a Class A warehouse, and is transported to a Class A workshop by a forklift, the waste liquid is pumped into a transfer tank in the Class A workshop, the waste residue is manually fed into the stirring tank, is mixed with the phosphorus-containing waste liquid to form a phosphorus-containing slurry, a certain amount of water and hydrochloric acid with a required concentration are first fed into the hydrolysis kettle, the phosphorus-containing waste liquid and the slurry are then pumped into the enamel hydrolysis reaction kettle, and are fed into the enamel hydrolysis reaction kettle at a drop speed controlled by a flow meter and an adjusting valve, and are subjected to a hydrolysis reaction with the quantitatively added water, the reaction temperature is not higher than 60℃ to ensure that the hydrolysis is safe, stable and controllable, the hydrolysis is performed in a sequence batch mode, the hydrolysis liquid is pumped into the enamel kettle for evaporation and concentration to reduce the volume, the concentrated liquid is fed into a spraying device above a double-shaft stirring machine, is fully mixed with the added carbide slag to form a solid, and is then bagged.

[0042] In the embodiment, the phosphorus-containing waste liquid and waste residue are discharged into a transfer tank, a stirring tank and the like, and react with air to produce acid-containing waste gas and combustible gas. There are risks such as overpressure in the hydrolysis kettle during the hydrolysis process. The transfer tank, the hydrolysis kettle, the hydrolysis liquid storage tank, the concentrated liquid storage tank and the like are provided with existing nitrogen sealing devices. The waste gas is connected to a waste gas treatment device. A breather valve and a flame arrestor are provided to ensure the stability and safety of the operation process and the controllability of the operation.

[0043] In the embodiment, two groups of basket filters can be arranged at the pipe inlet before the hydrolysis of the phosphorus-containing waste according to the needs. Valves are arranged before and after the basket filters to facilitate switching and cleaning.

[0044] In the embodiment, refer to Figure 2 , specifically, the first waste gas treatment system includes a carbide slag pulping system 1, a three-stage deacidification tower 2, a secondary activated carbon tank 3, an induced draft fan 4 and a roller blade dryer 5. The waste gas outlets of the hydrolysis kettle and the concentration kettle are communicated with the three-stage deacidification tower 2. The carbide slag pulping system 1 is connected to the spray pipe of the three-stage deacidification tower 2 through a pump and a pipe. The clear liquid of the carbide slag in the carbide slag pulping system 1 is used as the absorption liquid of the three-stage deacidification tower 2. The outlet of the three-stage deacidification tower 2 is communicated with the secondary activated carbon tank 3. The waste gas treated by the secondary activated carbon tank 3 is discharged by the induced draft fan 4. The neutralization tank at the lower part of the three-stage deacidification tower 2 is connected to the roller blade dryer 5 through a pump and a pipe. The roller blade dryer 5 dries the liquid produced by the deacidification of the three-stage deacidification tower 2.

[0045] The condensate recovered by the condensers on the hydrolysis kettle and the concentration kettle is delivered to the carbide slag pulping system 1 by a pump. The carbide slag pulping system 1 adopts two-stage coagulation pits. The first stage is a carbide slag dissolving tank. The second stage is a carbide slag clear liquid tank. The supernatant of the dissolving tank flows into the clear liquid tank through overflow. The dissolving tank is provided with a stirrer. The insoluble substances at the bottom are filtered by a plate and frame filter press. The filtering area of the plate and frame filter press is ≮30㎡. The moisture content of the filter cake is ≯50%. The filtrate is returned to the carbide slag dissolving tank.

[0046] In the embodiment, the solidification system includes a double-shaft mixer and a feeder. The feeder adopts existing technology. For example, the carbide slag is unpacked by a ton bag unpacking machine, scattered, delivered to the double-shaft mixer by a bucket elevator, and the like. The upper end of the double-shaft mixer is provided with a dust collection hood. Dust-containing waste gas is sent to the second waste gas treatment system through the dust collection hood and a pipe.

[0047] In the embodiment, refer to Figure 3 , specifically, the second waste gas treatment system includes a bag-type dust collector 6, a first-stage deacidification tower 7, a first-stage activated carbon tank 8, an induced draft fan 4 and a chimney 9. The double-shaft mixer is communicated with the inlet end of the bag-type dust collector 6 through a dust collection hood and a pipe. A material level meter and a vibrator are arranged at the ash hopper of the bag-type dust collector 6. The outlet end of the bag-type dust collector 6 is communicated with the first-stage deacidification tower 7. The first-stage deacidification tower 7 is communicated with the inlet end of the first-stage activated carbon tank 8. The outlet end of the first-stage activated carbon tank 8 is communicated with the chimney 9 by the induced draft fan 4 to discharge the waste.

[0048] The primary deacidification tower does not add carbide slurry, and hydrogen chloride gas is absorbed by industrial water, and the obtained dilute hydrochloric acid is pumped to a hydrolysis kettle or a secondary deacidification tower.

[0049] In addition to the above-mentioned embodiments, the utility model can also have other implementation manners. Any technical solution formed by equivalent replacement or equivalent transformation falls within the protection scope required by the utility model.

Claims

1. A phosphorous-containing waste solidification treatment system characterized by comprising: The system comprises a hydrolysis system, a concentration system, a solidification system and a waste gas treatment system, the waste gas treatment system comprises a first waste gas treatment system and a second waste gas treatment system, the outlet end of the hydrolysis system is communicated with the inlet end of the concentration system through a pipeline and a pump, the outlet end of the concentration system is communicated with the inlet end of the solidification system through a pipeline and a pump, waste gas outlets are respectively arranged on the hydrolysis system, the concentration system and the solidification system, the waste gas outlets of the hydrolysis system and the concentration system are communicated with the first waste gas treatment system, and the waste gas outlet of the solidification system is communicated with the second waste gas treatment system. Phosphorus-containing waste is sent to the hydrolysis system for hydrolysis, the hydrolyzed hydrolysis liquid is sent to the concentration system for concentration, waste gas generated by the hydrolysis system is sent to the first waste gas treatment system for treatment and then discharged, the concentrated liquid generated by the concentration system is sent to the solidification system for adding a solidification agent for solidification, waste gas generated by the concentration system is sent to the first waste gas treatment system for treatment and then discharged, the solid waste generated by the solidification of the concentrated liquid in the solidification system is directly landfilled, and waste gas generated by the solidification system is sent to the second waste gas treatment system for treatment and then discharged.

2. The phosphorous-containing waste solidification treatment system according to claim 1, characterized by: The hydrolysis system is a hydrolysis reactor, the hydrolysis reactor is connected with a water metering tank and a medicament storage tank through pipelines respectively, the inlet end of the hydrolysis reactor is connected with a stirring tank through a pipeline and a pump, the stirring tank is used for stirring the phosphorus-containing waste, and the waste gas outlet of the hydrolysis reactor is further connected with a condenser.

3. The phosphorous-containing waste solidification treatment system according to claim 2, characterized by: The medicament storage tank is provided with hydrochloric acid.

4. The phosphorous-containing waste solidification treatment system according to claim 2, characterized by: The concentration system is a concentration kettle, the concentration kettle is externally connected with steam through a pipeline, and the waste gas outlet of the concentration kettle is further connected with a condenser.

5. The phosphorous-containing waste solidification treatment system according to claim 4, characterized by: The first waste gas treatment system comprises a carbide slag pulping system (1), a three-stage deacidification tower (2), a secondary activated carbon tank (3) and an induced draft fan (4), the waste gas outlets of the hydrolysis reactor and the concentration kettle are communicated with the three-stage deacidification tower (2), the carbide slag pulping system (1) is connected to the spray pipe of the three-stage deacidification tower (2) through a pump and a pipeline, the carbide slag clear liquid in the carbide slag pulping system (1) is used as the absorption liquid of the three-stage deacidification tower (2), the outlet of the three-stage deacidification tower (2) is communicated with the secondary activated carbon tank (3), and the waste gas treated by the secondary activated carbon tank (3) is discharged through the induced draft fan (4); The condensate recovered by the condensers on the hydrolysis reactor and the concentration kettle is delivered to the carbide slag pulping system (1) through a pump.

6. The phosphorous-containing waste solidification treatment system according to claim 5, characterized by: A drum scraper dryer (5) is further arranged, the neutralization tank at the lower part of the three-stage deacidification tower (2) is connected to the drum scraper dryer (5) through a pump and a pipeline, and the drum scraper dryer (5) is used for drying the liquid generated by the deacidification of the three-stage deacidification tower (2).

7. The phosphorous-containing waste solidification treatment system according to claim 1, characterized by: The solidification system comprises a double-shaft stirrer and a feeder, the feeder adds a solidification agent into the double-shaft stirrer, a dust collection hood is arranged at the upper end of the double-shaft stirrer, and dust-containing waste gas is sent to the second waste gas treatment system through the dust collection hood and a pipeline.

8. The phosphorous-containing waste solidification treatment system according to claim 7, characterized by: The second waste gas treatment system comprises a bag filter (6), a first deacidification tower (7), a first activated carbon tank (8), an induced draft fan (4) and a chimney (9), the double-shaft mixer is communicated with the inlet end of the bag filter (6) through a dust collecting hood and a pipeline, the outlet end of the bag filter (6) is communicated with the first deacidification tower (7), the first deacidification tower (7) is communicated to the inlet end of the first activated carbon tank (8), and the outlet end of the first activated carbon tank (8) is communicated to the chimney (9) by the induced draft fan (4) to discharge waste gas.

9. The phosphorous-containing waste solidification treatment system according to claim 8, characterized by: A material level meter and a vibrator are arranged at the ash bucket of the bag filter (6).

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