Phosphorus-containing waste solidification treatment system

Abstract

The invention discloses a phosphorus-containing waste solidification treatment system, and belongs to the technical field of hazardous waste solidification treatment, the phosphorus-containing waste solidification treatment 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 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 invention relates to a solidification treatment system, in particular to a phosphorus-containing waste solidification treatment system, and belongs to the technical field of hazardous waste solidification treatment. Background Art

[0002] With the development of industry, the discharge of various phosphorus-containing compounds and organic matter has caused environmental pollution. These pollutants have stable molecular structures and certain biological toxicity, making them difficult to remove through traditional wastewater treatment methods.

[0003] The phosphorus-containing waste liquid produced in the production process of pesticide intermediates is a hazardous waste that is toxic, reactive and corrosive. The phosphorus-containing waste mainly consists of the fore-fraction, reactor residual liquid and tank cleaning waste liquid generated in the production process of the pesticide intermediate diethyl methyl phosphite, and its main components are phosphorus trichloride, methyl phosphorus dichloride, etc.

[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 produced after high-temperature incineration. P2O5 has extremely strong hygroscopicity and is highly corrosive at high temperatures. Hydrogen chloride gas turns into hydrochloric acid when the dew point temperature is lower than that, which is a strong acid. These two substances have great damage to incinerators, flue gas pipelines, and flue gas purification equipment, greatly reducing the life of refractory materials and equipment, and increasing operation and maintenance costs. Therefore, phosphorus-containing and chlorine-containing waste liquid is not suitable for direct incineration treatment systems.

[0005] On the other hand, the phosphorus-containing and chlorine-containing waste liquids produced by pesticide companies are reactive because substances such as phosphorus trichloride and methyl phosphorus dichloride react with water to produce methanol and hydrochloric acid, and cannot be directly landfilled. Therefore, the treatment and disposal of phosphorus-containing and chlorine-containing waste liquids currently faces huge challenges.

[0006] At present, the treatment method for phosphorus-containing waste is to send it to a solidification device, add a solidifying agent and a stabilizer to form a stable whole, and then enter the landfill for landfilling. Patent CN208583797U is a self-cementing solidification system for industrial solid waste. One path is calcined into a binder, and the other path is sent to a mixer, and finally the industrial solid waste, binder, additives and auxiliary additives are mixed and solidified. After solidification, the landfill treatment is carried out to improve the curing efficiency and effect. The operation is simple, but the curing system also needs to be calcined, the process is complicated, and for waste liquid with high content, calcination is very easy to corrode and damage the equipment. Finally, it is solidified in the mixer, and directly after solidification, it is Landfill; Patent CN209591555 A waste solidification system 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 cementitious material to the solidification device, the stirring device mixes and stirs the waste and cementitious material in the solidification device, and the second feeding device conveys the slurry cementitious material to the solidification device so that the slurry cementitious material covers the mixture of the waste and the cementitious material to complete the solidification. The system has a simple structure, easy operation and low cost, but the solidification system is only a simple mixing and stirring, and uses common cement for solidification.

[0007] The above methods are only for simple solidification of wastes containing less harmful substances. Simple solidification of phosphorus-containing wastes cannot remove phosphorus, and cannot be directly landfilled, which will cause pollution. There is no subsequent treatment system for waste liquids and waste gases, etc. The treatment of phosphorus-containing wastes is incomplete, has poor environmental performance, and does not achieve the effect of treating waste with waste.

[0008] Therefore, developing a phosphorus-containing waste solidification treatment system that can overcome the above defects has become a technical problem that needs to be solved urgently by technical personnel in this field. Summary of the invention

[0009] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a phosphorus-containing waste solidification treatment system. The system has a simple structure, is easy to use and operate, and can effectively treat phosphorus-containing waste and directly landfill it. The treatment process is environmentally friendly and harmless, with low cost, and it can treat waste with waste.

[0010] In order to solve the above technical problems, the present invention provides a phosphorus-containing waste solidification treatment system, including a hydrolysis system, a concentration system, a solidification system and a waste gas treatment system, the waste gas treatment system includes a first waste gas treatment system and a second waste gas treatment system, the outlet end of the hydrolysis system is connected to the inlet end of the concentration system through a pipeline and a pump, the outlet end of the concentration system is connected to 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 connected to the first waste gas treatment system, and the waste gas outlet of the solidification system is connected to the second waste gas treatment system; Phosphorus-containing waste is sent to the hydrolysis system and hydrolyzed by the hydrolysis system. The hydrolyzed liquid enters 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 hydrolyzed liquid after concentration by the concentration system is sent to the solidification system for adding a curing agent for solidification. The 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 concentrate in the solidification system is directly landfilled. The waste gas generated by the solidification system is sent to the second waste gas treatment system for treatment and then discharged.

[0011] The technical solution further defined in the present invention is: Furthermore, in the aforementioned phosphorus-containing waste solidification treatment system, the hydrolysis system is a hydrolysis reactor, which is connected to a water metering tank and a reagent storage tank through pipelines, respectively. The inlet end of the hydrolysis reactor is connected to a stirring tank through a pipeline and a pump. The stirring tank is used to stir the phosphorus-containing waste. The exhaust gas outlet of the hydrolysis reactor is also connected to a condenser, and the exhaust gas is condensed by the condenser and then sent to the first exhaust gas treatment system for treatment.

[0012] Technical effect: The present invention adopts a hydrolysis reactor, preferably an enamel hydrolysis reactor for hydrolysis reaction. The phosphorus-containing waste is treated to eliminate reactivity through hydrolysis, meeting the landfill entry requirements. A condenser is connected to the waste gas outlet of the hydrolysis reactor to condense the waste gas first. The purpose of condensation is to condense the condensable gas in the waste gas first. The non-condensable gas needs to be treated in the subsequent waste gas treatment system. After condensation, it can be recycled and reused to reduce costs. At the same time, the waste gas is treated more thoroughly. The condensate is transported to the carbide slag pulping system through a pump for waste utilization. The non-condensable gas is transported to the first waste gas treatment system through a vacuum pump and an induced draft fan for treatment. In the aforementioned phosphorus-containing waste solidification treatment system, hydrochloric acid is contained in the reagent storage tank.

[0013] In the aforementioned phosphorus-containing waste solidification treatment system, the concentration system is a concentration kettle, and steam is connected to the concentration kettle through a pipeline. The exhaust gas outlet of the concentration kettle is also connected to a condenser. The exhaust gas is condensed by the condenser and then sent to the first exhaust gas treatment system for treatment.

[0014] Technical effect: the present invention connects steam to the concentrating kettle, and the steam in the concentrating kettle is introduced from the outside. The concentrating kettle is a jacketed type, and mainly relies on the heat of the steam for indirect heat exchange, so as to better complete the work.

[0015] In the aforementioned phosphorus-containing waste solidification treatment system, the first waste gas treatment system includes a carbide slag pulping system, a three-stage deacidification tower, a two-stage activated carbon box and an induced draft fan, the waste gas outlets of the hydrolysis reactor and the concentration reactor are connected to 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 connected to the two-stage activated carbon box, and the waste gas treated by the two-stage activated carbon box is discharged through the induced draft fan; The condensate recovered from the condensers on the hydrolysis reactor and the concentration reactor is transported to the carbide slag pulping system through a pump.

[0016] Technical effect: The present invention sets up a first waste gas treatment system to treat the waste gas from the hydrolysis reactor and the concentration reactor, absorb the acidic waste gas, and then filter it, so that the discharged waste gas meets the standards and avoids polluting the environment. The first waste gas treatment system has a carbide slag pulping system. The use of carbide slag in this application is waste utilization, and the condensed water collected by condensation is used to make pulp for further waste utilization, which effectively reduces costs and uniformly treats it without additional treatment.

[0017] The aforementioned phosphorus-containing waste solidification treatment system also includes a scraper drum dryer. The neutralization tank at the bottom of the three-stage deacidification tower is connected to the scraper drum dryer through a pump and a pipeline. The scraper drum dryer dries the liquid produced by the deacidification of the three-stage deacidification tower.

[0018] Technical effect: The present invention arranges a drum scraper dryer to dry the deacidified solution, and the obtained calcium chloride can be used for other purposes, thereby utilizing waste and reducing costs.

[0019] In the aforementioned phosphorus-containing waste solidification treatment system, the solidification system includes a twin-shaft mixer and a feeder. The feeder adds the curing agent into the twin-shaft mixer. A dust hood is provided at the upper end of the twin-shaft mixer. The dust-containing exhaust gas is sent to the second exhaust gas treatment system through the dust hood and the pipeline.

[0020] In the aforementioned phosphorus-containing waste solidification treatment system, the second waste gas treatment system includes a bag dust collector, a primary deacidification tower, a primary activated carbon box, an induced draft fan and a chimney. The twin-shaft mixer is connected to the inlet end of the bag dust collector through a dust hood and a pipeline, the outlet end of the bag dust collector is connected to the primary deacidification tower, the primary deacidification tower is connected to the inlet end of the primary activated carbon box, and the outlet end of the primary activated carbon box is connected to the chimney by the induced draft fan to discharge the waste.

[0021] In the aforementioned phosphorus-containing waste solidification treatment system, a level meter and a vibrator are provided at the ash hopper of the bag filter.

[0022] Technical effect: The present invention arranges a level meter and a vibrator at the ash hopper of the bag-type dust collector, so as to facilitate timely processing of the dust in the ash hopper and the dust in the slurry bag-type dust collector, thereby completely removing the dust, improving the efficiency and ensuring the dust removal effect of the bag-type dust collector.

[0023] The beneficial effects of the present invention are: The present invention is provided with a hydrolysis system, a concentration system, a solidification system and a waste gas treatment system. The phosphorus-containing waste is treated by the hydrolysis system to eliminate the reactivity and meet the landfill entry requirements. The reduced pressure concentration treatment is a volume reduction process, which can reduce the subsequent landfill volume and reduce the volume increase ratio. The amount of hazardous waste that can be filled in the same landfill is greatly increased, and the cost is effectively reduced. After solidification, it is directly landfilled without other treatment, which reduces the process requirements and is easy to use. The waste gas obtained after the treatment is matched with the waste gas treatment system, which is completely treated and discharged harmlessly to avoid polluting the environment. In addition, carbide slag is used in the waste gas treatment, and condensed water is used to make carbide slag solution, thereby achieving the effect of treating waste with waste.

[0024] The present invention is provided with a carbide slag slurry making system, wherein the feeder on the double-shaft mixer adds carbide slag, carbide slag, and waste slag with calcium hydroxide as the main component after acetylene gas is obtained by hydrolyzing carbide. Acetylene (C2H2) is one of the important raw materials of the basic organic synthesis industry. The process of producing acetylene by using carbide (CaC2) as the raw material and adding water (wet method) is simple and mature, and accounts for a large proportion in my country. 1 ton of carbide plus water can generate more than 300 kg of acetylene gas, and at the same time generate 10 ton of industrial waste liquid with a solid content of about 12%, commonly known as carbide slag slurry. In the treatment process of the present invention, a large amount of calcium hydroxide with a dry content of 75% is used. % of carbide slag; during solidification, carbide slag is used instead of limestone to make cement, etc. to complete the solidification. Carbide slag is rich in calcium hydroxide and contains some volcanic ash active materials. It has a large specific surface area and fine particles. The mechanical properties are significantly affected by water content. The solidification mechanism is mainly based on the exchange of Ca2+ with metal ions in the waste and the volcanic ash reaction under alkaline excitation. These reactions help to improve the strength and stability of the waste. Adding carbide slag for solidification can treat waste with waste and realize resource utilization; carbide slag is also used instead of alkali in neutralization treatment to reduce the use of alkali and reduce disposal costs.

[0025] The second waste gas treatment system of the present invention adopts a bag filter to remove dust from the waste gas, and the first-level deacidification tower uses industrial water to absorb hydrogen chloride gas, and the obtained dilute hydrochloric acid is transported to the hydrolysis kettle by a pump for deacidification and recycling, thereby reducing costs. The system of the present invention directly landfills phosphorus-containing waste after complete treatment, 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, with high treatment efficiency and convenient use.

[0026] The hydrolysis and solidification of phosphorus-containing wastes in the present invention are equipped with environmental protection devices. Mixed waste gases such as hydrogen chloride, methanol, dichloromethane, water vapor, etc. generated in the hydrolysis and concentration process are condensed by a condenser, and the condensate is transported to the existing device for recycling through a pump. The non-condensable gas is transported to the water washing tower through a vacuum pump and an induced draft fan, and then to the second-stage deacidification tower for washing and the second-stage activated carbon box for adsorption. After meeting the standards, it is discharged from the chimney, which is more environmentally friendly and safe.

[0027] The twin-shaft mixer of the present invention is prone to generate dust during operation, and a gas collecting hood needs to be set up to collect the dust. The exhaust gas is purified by a bag filter and then connected to a primary deacidification tower for washing and a primary activated carbon box for purification before being discharged from a chimney, which is more environmentally friendly and safe. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a flow chart of a phosphorus-containing waste solidification treatment system according to an embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram of the structure of the first exhaust gas treatment system; Figure 3 for Figure 1 A schematic diagram of the structure of the second exhaust gas treatment system; In the figure: 1- calcium carbide slag pulping system, 2- three-stage deacidification tower, 3- secondary activated carbon box, 4- induced draft fan, 5- drum scraper dryer, 6- bag dust collector, 7- primary deacidification tower, 8- primary activated carbon box, 9- chimney. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments; the technical features involved in the various implementation methods of the present invention described below can be combined with each other as long as they do not conflict with each other. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example 1

[0030] This embodiment provides a phosphorus-containing waste solidification treatment system, see Figure 1 , including a hydrolysis system, a concentration system, a solidification system and a waste gas treatment system, the waste gas treatment system includes a first waste gas treatment system and a second waste gas treatment system, the outlet end of the hydrolysis system is connected to the inlet end of the concentration system through a pipeline and a pump, the outlet end of the concentration system is connected to 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 connected to the first waste gas treatment system, and the waste gas outlet of the solidification system is connected to the second waste gas treatment system; The phosphorus-containing waste is sent to the hydrolysis system for hydrolysis, and the hydrolyzate after hydrolysis enters 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 hydrolyzate after concentration by the concentration system is sent to the curing system to add curing agent calcium carbide slag for curing, and the waste gas generated by the concentration system is sent to the first waste gas treatment system for treatment and then discharged; Specifically, the concentration system is a concentration kettle, steam is externally connected to the concentration kettle through a pipeline, and a condenser is also connected to the exhaust gas outlet of the concentration kettle. The exhaust gas is condensed by the condenser and then sent to the first exhaust gas treatment system for treatment; Specifically, the hydrolysis system is a hydrolysis reactor, which is connected to a water metering tank and a reagent storage tank through pipelines, respectively. The reagent storage tank is filled with hydrochloric acid. The exhaust gas outlet of the hydrolysis reactor is also connected to a condenser. The exhaust gas is condensed by the condenser and then sent to the first exhaust gas treatment system for treatment. The inlet end of the hydrolysis reactor is connected to a stirring tank through a pipeline and a pump. The stirring tank is used for stirring phosphorus-containing waste, specifically: Phosphorus-containing waste is divided into waste liquid and semi-solid waste residue, which are temporarily stored in Class A warehouses in barrels of 20L and 200L and transported to Class A workshops by forklifts. The waste liquid is pumped to the transfer tank in the Class A workshop by pumps, and the waste residue is manually fed into the mixing tank and mixed with the phosphorus-containing waste liquid to form a phosphorus-containing slurry. A certain amount of water and hydrochloric acid of the required concentration are first transported to the hydrolysis kettle, and the phosphorus-containing waste liquid and slurry are then pumped to the enamel hydrolysis reactor by pumps, and the dripping speed is controlled by the set flow meter and regulating valve. The reactor is transported to the enamel hydrolysis reactor for hydrolysis reaction with the quantitatively added water. To ensure the safety, stability and controllability of the hydrolysis, the reaction temperature shall not be higher than 60°C. The hydrolysis is carried out in batches, and the hydrolyzate is pumped to the enamel reactor for evaporation, concentration and volume reduction. The concentrated liquid is transported to the spray device above the double-shaft mixer, fully mixed with the added calcium carbide slag to form a solid, and then packed into ton bags.

[0031] In this embodiment, during the process of unloading phosphorus-containing waste liquid and waste residue into transfer tanks, mixing tanks, etc., they come into contact with air and react to produce acid-containing waste gas and flammable gas. During the hydrolysis process, there are risks such as overpressure in the hydrolysis kettle. The transfer tank, hydrolysis kettle, hydrolysis liquid storage tank, concentrated liquid storage tank, etc. are equipped with existing nitrogen sealing devices, the waste gas is connected to the waste gas treatment device, and a breathing valve flame arrester is installed to ensure the stability and safety of the operation process and controllable operation.

[0032] In this embodiment, two sets of basket filters can be set at the pump inlet in the pipeline before the hydrolysis of phosphorus-containing waste as needed, and valves can be set before and after to facilitate switching and cleaning.

[0033] In this embodiment, see Figure 2The specific first waste gas treatment system includes a carbide slag pulping system 1, a tertiary deacidification tower 2, a secondary activated carbon box 3, an induced draft fan 4 and a drum scraper dryer 5. The waste gas outlets of the hydrolysis reactor and the concentration reactor are connected to the tertiary deacidification tower 2. The carbide slag pulping system 1 is connected to the spray pipe of the tertiary 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 tertiary deacidification tower 2. The outlet of the tertiary deacidification tower 2 is connected to the secondary activated carbon box 3. The waste gas treated by the secondary activated carbon box 3 is discharged through the induced draft fan 4. The neutralization tank at the bottom of the tertiary deacidification tower 2 is connected to the drum scraper dryer 5 through a pump and a pipeline. The drum scraper dryer 5 dries the liquid produced by the deacidification of the tertiary deacidification tower 2. The condensate recovered from the condensers on the hydrolysis reactor and the concentration reactor is transported to the carbide slag pulping system 1 through a pump. The carbide slag pulping system 1 adopts a two-stage concrete pit. The first stage is the carbide slag dissolving tank, and the second stage is the carbide slag clear liquid tank. The supernatant on the dissolving tank flows into the clear liquid tank through overflow. The dissolving tank is equipped with an agitator. The insoluble matter at the bottom is filtered by a plate and frame filter press. The filtration area of ​​the plate and frame filter press is ≮30㎡, the moisture content of the filter cake is ≯50%, and the filtrate is returned to the carbide slag dissolving tank.

[0034] In this embodiment, the solidification system includes a twin-shaft mixer and a feeder. The feeder adopts existing technology. For example, the calcium carbide slag is unpacked and broken up by a ton bag unpacking machine, and then transported to the twin-shaft mixer through a bucket elevator. A dust hood is provided at the upper end of the twin-shaft mixer, and the dust-containing exhaust gas is sent to the second exhaust gas treatment system through the dust hood and the pipeline.

[0035] In this embodiment, see Figure 3 The specific second exhaust gas treatment system includes a bag filter 6, a primary deacidification tower 7, a primary activated carbon box 8, an induced draft fan 4 and a chimney 9. The double-shaft mixer is connected to the inlet end of the bag filter 6 through a dust collecting hood and a pipeline. A level meter and a vibrator are arranged at the ash hopper of the bag filter 6. The outlet end of the bag filter 6 is connected to the primary deacidification tower 7, and the primary deacidification tower 7 is connected to the inlet end of the primary activated carbon box 8. The outlet end of the primary activated carbon box 8 is connected to the chimney 9 by the induced draft fan 4 to discharge the waste; The first-stage deacidification tower does not add carbide slag slurry, and uses industrial water to absorb hydrogen chloride gas. The obtained dilute hydrochloric acid is transported to the hydrolysis kettle or the second-stage deacidification tower through a pump.

[0036] In addition to the above embodiments, the present invention may also have other implementation modes. Any technical solution formed by equivalent replacement or equivalent transformation falls within the protection scope required by the present invention.

Claims

1. A phosphorus-containing waste solidification treatment system, characterized in that: It includes a hydrolysis system, a concentration system, a solidification system and a waste gas treatment system, wherein the waste gas treatment system includes a first waste gas treatment system and a second waste gas treatment system, the outlet end of the hydrolysis system is connected to the inlet end of the concentration system through a pipeline and a pump, the outlet end of the concentration system is connected to 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 connected to the first waste gas treatment system, and the waste gas outlet of the solidification system is connected to the second waste gas treatment system; Phosphorus-containing waste is sent to the hydrolysis system and hydrolyzed by the hydrolysis system. The hydrolyzed liquid after hydrolysis enters 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 after the hydrolyzed liquid is concentrated by the concentration system is sent to the solidification system and added with a curing agent for solidification. The 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. The waste gas generated by the solidification system is sent to the second waste gas treatment system for treatment and then discharged.

2. The phosphorus-containing waste solidification treatment system according to claim 1, characterized in that: The hydrolysis system is a hydrolysis reactor, which is connected to a water metering tank and a reagent storage tank through pipelines. The inlet end of the hydrolysis reactor is connected to a stirring tank through a pipeline and a pump. The stirring tank is used to stir phosphorus-containing waste. The waste gas outlet of the hydrolysis reactor is also connected to a condenser. The waste gas is condensed by the condenser and then sent to the first waste gas treatment system for treatment.

3. The phosphorus-containing waste solidification treatment system according to claim 2, characterized in that: The medicine storage tank is filled with hydrochloric acid.

4. The phosphorus-containing waste solidification treatment system according to claim 1, characterized in that: The concentration system is a concentration kettle, and steam is externally connected to the concentration kettle through a pipeline. The exhaust gas outlet of the concentration kettle is also connected to a condenser. The exhaust gas is condensed by the condenser and then sent to the first exhaust gas treatment system for treatment.

5. The phosphorus-containing waste solidification treatment system according to claim 2 or 4, characterized in that: The first waste gas treatment system comprises a carbide slag pulping system (1), a three-stage deacidification tower (2), a two-stage activated carbon box (3) and an induced draft fan (4); the waste gas outlets of the hydrolysis reactor and the concentration reactor are connected to 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 connected to the two-stage activated carbon box (3); and the waste gas treated by the two-stage activated carbon box (3) is discharged through the induced draft fan (4); The condensate recovered from the condensers on the hydrolysis reactor and the concentration reactor is transported to the carbide slag pulping system (1) via a pump.

6. The phosphorus-containing waste solidification treatment system according to claim 5, characterized in that: It also includes a scraper drum dryer (5), wherein the neutralization tank at the bottom of the tertiary deacidification tower (2) is connected to the scraper drum dryer (5) via a pump and a pipeline, and the scraper drum dryer (5) dries the liquid produced by the deacidification in the tertiary deacidification tower (2).

7. The phosphorus-containing waste solidification treatment system according to claim 1, characterized in that: The curing system includes a twin-shaft mixer and a feeder. The feeder adds curing agent into the twin-shaft mixer. A dust hood is provided at the upper end of the twin-shaft mixer. Dust-containing exhaust gas is sent to the second exhaust gas treatment system through the dust hood and a pipeline.

8. The phosphorus-containing waste solidification treatment system according to claim 7, characterized in that: The second waste gas treatment system comprises a bag filter (6), a primary deacidification tower (7), a primary activated carbon box (8), an induced draft fan (4) and a chimney (9); the double-shaft mixer is connected to the inlet end of the bag filter (6) via a dust collecting hood and a pipeline; the outlet end of the bag filter (6) is connected to the primary deacidification tower (7); the primary deacidification tower (7) is connected to the inlet end of the primary activated carbon box (8); and the outlet end of the primary activated carbon box (8) is connected to the chimney (9) via the induced draft fan (4) to discharge waste.

9. The phosphorus-containing waste solidification treatment system according to claim 8, characterized in that: A material level meter and a vibrator are provided at the ash hopper of the bag filter (6).

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