Phosphorus-containing waste curing process

Abstract

The invention discloses a phosphorus-containing waste curing process, and belongs to the technical field of hazardous waste curing treatment, and the phosphorus-containing waste curing process specifically comprises the following steps: (1) sequentially carrying out hydrolysis, filtration, impurity removal and catalytic oxidation treatment on phosphorus-containing waste to obtain hydrolysate; (2) concentrating the hydrolysate obtained in the step (1), and centrifuging to obtain a concentrated solution; (3) carrying out curing treatment on the centrifuged concentrated solution under the action of a curing agent and a curing auxiliary agent to obtain a calcium phosphate cured body for landfill; the process is simple and easy to implement, organic matter is removed while reactivity is eliminated, the landfill requirement is met, waste is treated with waste, and the capacity increasing ratio can be reduced.

Description

Technical Field

[0001] The invention relates to a solidification process, in particular to a phosphorus-containing waste solidification process, 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 liquids are not suitable for direct incineration treatment.

[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, patent CN117466502A discloses a method for recovering phosphorus-containing waste liquid, which filters and removes impurities, uses phosphorus-containing waste liquid to purify iron phosphate raw materials, realizes the recovery and utilization of phosphoric acid and sulfuric acid in phosphorus-containing waste liquid, adjusts pH value to precipitate and remove aluminum ions, controls controlled elements in phosphorus-containing waste liquid, and effectively removes impurities such as Al(OH)3, AlPO4, organic matter and metal ions through multi-step treatment. It is mainly for removing impurities in phosphorus-containing waste liquid, and does not involve direct landfill of phosphorus-containing waste liquid, and the reactivity of phosphorus-containing waste liquid is not removed; patent CN114408890B discloses a method for preparing optical-grade calcium metaphosphate from phosphorus-containing waste liquid, which oxidizes and removes impurities, concentrates, adds calcium source to adjust pH, precipitates, and then spheroidizes and roasts to obtain calcium phosphate. The main purpose is to obtain high-purity calcium metaphosphate, prepare phosphorus-containing waste liquid into finished products, and reuse waste. This method requires roasting and other processes, has a long process route and high cost.

[0007] Therefore, developing a phosphorus-containing waste solidification process 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

[0008] 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 process, which does not require the production of finished products, is simple and easy to operate, eliminates reactivity while removing organic matter, meets the requirements of direct landfill, treats waste with waste, reduces the volume increase ratio, and replaces the existing incineration process to effectively avoid corrosion.

[0009] In order to solve the above technical problems, the present invention provides a phosphorus-containing waste solidification process, which specifically comprises the following steps: (1) The phosphorus-containing waste is subjected to hydrolysis, filtration, impurity removal, catalytic oxidation treatment in sequence to obtain a hydrolyzate; The hydrolysis reaction temperature is 45-70°C and the hydrolysis time is 0.5-2.5h; (2) concentrating the hydrolyzate obtained in step (1) to obtain a concentrate by centrifugation; The concentration treatment is reduced pressure concentration, the concentration temperature is 65-85°C, the concentration time is 2-4h, and the vacuum degree at the concentration end point is -0.081-0.098Mpa; (3) The concentrated liquid after centrifugation is solidified under the action of a solidifying agent and a solidifying auxiliary agent to obtain a calcium phosphate solidified body for landfilling.

[0010] The technical solution further defined in the present invention is: Furthermore, in the aforementioned phosphorus-containing waste solidification process, the phosphorus-containing waste in step (1) includes phosphorus-containing waste liquid and phosphorus-containing waste residue, and the phosphorus-containing waste includes the following components by mass: Trimethyl phosphite: 8.3%~15.3%, dimethyl phosphite: 12%~19%, monomethyl phosphite: 8%~16%, dichloromethane: 1%~6%, phosphorous acid: 10%~15%, insoluble solids: 13%~18%, the remainder is phosphorus trichloride, the sum of the above components is 100%.

[0011] In the above-mentioned phosphorus-containing waste solidification process, the mass ratio of the phosphorus-containing waste to water during hydrolysis in step (1) is 1:1-1:5.

[0012] In the above-mentioned phosphorus-containing waste solidification process, the catalytic oxidant used in the impurity removal catalytic oxidation is one of K2O2, Na2O2, and H2O2.

[0013] In the above-mentioned phosphorus-containing waste solidification process, the mass ratio of the catalytic oxidant to the phosphorus-containing waste is (2.1-5.3): 100. In the above-mentioned phosphorus-containing waste solidification process, the solidifying agent is one or more of cement, lime, gypsum, and carbide slag; preferably, carbide slag.

[0014] In the aforementioned phosphorus-containing waste solidification process, the solidification auxiliary agent includes one or more of a chelating agent, a retarder, an antifreeze agent, an accelerator, and an adsorbent, all of which are existing.

[0015] In the aforementioned phosphorus-containing waste solidification process, the mass ratio of the solidifying agent to the molten liquid in step (3) of phosphorus-containing waste treatment is 8:1-15:1.

[0016] In the aforementioned phosphorus-containing waste solidification process, the waste gas generated during the hydrolysis and concentration process of the phosphorus-containing waste is condensed and then neutralized, the neutralized tail gas is treated in an activated carbon box and then discharged, and the neutralized waste liquid is evaporated to obtain calcium chloride.

[0017] In the above-mentioned phosphorus-containing waste solidification process, carbide slag is added for neutralization during neutralization treatment; the heat source for evaporation during evaporation is one or more of steam, heat transfer oil, and hot water, and the evaporation temperature is 100-120°C.

[0018] The beneficial effects of the present invention are: (1) Compared with the prior art, in order to prepare new finished products and ensure the quality of the finished products, high requirements are placed on each process. Since there are insoluble substances in the phosphorus-containing waste liquid, it is necessary to first filter and remove the residue, and then concentrate it to meet the purity quality of the final prepared new finished product. The present invention treats phosphorus-containing waste for direct landfilling. Through the dual treatment of hydrolysis and hydrogen peroxide impurity removal, the reactivity is eliminated while the organic matter contained therein is removed to meet the landfill entry requirements; through the decompression treatment, which is a volume reduction process, the subsequent landfill volume can be reduced and the volume increase ratio can be reduced. The amount of hazardous waste that can be filled in the same landfill is greatly increased, effectively reducing costs; In the present invention, there is no filtration followed by concentration, but direct hydrolysis to remove reactivity, and then the insoluble matter is simply filtered to remove residues. The process requirements are lower than those for preparing new finished products, the process is simpler, and the cost is low.

[0019] (2) Calcium carbide slag, which is waste slag with calcium hydroxide as the main component after acetylene gas is obtained by hydrolysis of calcium carbide. Acetylene (C2H2) is one of the important raw materials for the basic organic synthesis industry. The process of producing acetylene by adding water (wet process) with calcium carbide (CaC2) as the raw material is simple and mature, and accounts for a large proportion in my country. 1 ton of calcium carbide plus water can generate more than 300 kg of acetylene gas and 10 tons of industrial waste liquid with a solid content of about 12%, commonly known as calcium carbide slag slurry. A large amount of calcium carbide slag is used in the treatment process of the present invention; The composition of carbide slag includes the following components by mass percentage: SiO2: 2%-5%, Al2O3: 1.5%-4%, Fe2O3: 0.2%-0.94%, MgO: 0.22%-1.68%, and the remainder is CaO. The sum of the above components is 100%.

[0020] During solidification, carbide slag is used instead of limestone to make cement. Carbide slag is rich in calcium hydroxide and contains some volcanic ash active materials. It has a large specific surface area and fine particles. Its 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.

[0021] (3) Currently, phosphorus-containing wastes are generally treated by incineration or by producing new products for reuse. However, incineration generally has the defect of being easily corroded by the system, making it difficult to produce new products, which is difficult and costly. The present invention provides a technical solution that is different from the existing incineration and production of new products. It can not only achieve the effect of treating phosphorus-containing wastes, but also will not corrode the incineration system, and can directly reach the level required for landfilling. It solves the technical problems that technicians have been eager to solve but have not succeeded in solving: phosphorus-containing waste liquid cannot be directly landfilled, incineration is easily corroded, and it is difficult to produce new products. Direct landfilling is achieved through hydrolysis solidification and compounding.

[0022] The main purpose of the process of the present invention is to directly landfill the phosphorus-containing waste after treatment, without the need to obtain product reuse, and without the need for multiple decompression concentrations, only one time is needed. The process route is short, the process requirements are low, the process is simple and the cost is low. The reactivity of the phosphorus-containing waste is directly eliminated by hydrolysis, and then solidification treatment is performed by adding calcium carbide slag, thereby achieving the stabilization disposal of the phosphorus-containing waste and solving the industry pain point that the incineration system of the phosphorus-containing waste is easily corroded during the incineration process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The figure is a flow chart of a phosphorus-containing waste solidification process according to an embodiment of the present invention. DETAILED DESCRIPTION Example 1

[0024] This embodiment provides a phosphorus-containing waste solidification process, the process is as follows Figure 1 As shown, the specific steps include: (1) The phosphorus-containing waste is subjected to hydrolysis, filtration, impurity removal and catalytic oxidation treatment in sequence to obtain a hydrolyzate, specifically: ①Pump the phosphorus-containing waste into the waste liquid buffer tank through a pump. The phosphorus-containing waste includes the following components by mass: Trimethyl phosphite: 8.3%, dimethyl phosphite: 12%, monomethyl phosphite: 8%, dichloromethane: 1%, phosphorous acid: 10%, insoluble solid: 13%, the balance is phosphorus trichloride, the sum of the above components is 100%; ② The phosphorus-containing waste and water are mixed in a mass ratio of about 1:3.0 and then hydrolyzed in a hydrolysis kettle. The hydrolysis reaction temperature is controlled at 60°C for 2 hours, and then the temperature is raised to 102°C and the reaction is continued for 1 hour to decompose phosphorus trichloride, methyl phosphorus dichloride and other substances into phosphorous acid, hydrochloric acid and methanol; The main reaction formula is: PCl3+3H2O=H3PO3+3HCl (CH3)PCl2+3H2O+1 / 2O2=H3PO3+CH3OH+2HCl; ③ The solution is finely filtered to remove insoluble residues, and the filtered insoluble residues are landfilled in a hazardous waste landfill. A catalytic oxidant is added to the filtered solution for impurity removal and catalytic oxidation treatment; The catalytic oxidant used is K2O2; the mass ratio of the catalytic oxidant to the phosphorus-containing waste is 2.1:100; (2) The hydrolyzate obtained in step (1) is concentrated to obtain a concentrated solution by centrifugation, specifically: ① After the hydrolysis is completed, slowly open the vacuum to make the final vacuum degree of the reactor -0.09MPa-0.095Mpa, and the final temperature in the reactor is 125℃, and then reduce the pressure and concentrate to evaporate the methanol and excess water after hydrolysis as much as possible; ② Pump the liquid in the reaction kettle into the crystallization kettle and concentrate it to 80°C for 3 hours. The vacuum degree at the end of concentration is -0.09-0.095Mpa. Put the liquid into the suction filter tank for suction filtration. After suction filtration, centrifuge the solid in the centrifuge until there is almost no liquid outflow; (3) The concentrated liquid after centrifugation is sent to the existing solidification system, with the mass ratio of the solidifying agent to the condensed liquid being 8:1-15:1, and solidified under the action of the solidifying agent calcium carbide slag and the solidification auxiliary agent activated carbon, and the obtained calcium phosphate solidified body is sent to the landfill for landfill; (4) The waste gas generated during the hydrolysis and concentration process of phosphorus-containing waste treatment is condensed by the existing supporting condenser, and most of the water, hydrogen chloride, methanol and dichloromethane are condensed into liquid and collected into the condensate collector. After the condensate is buffered in the collector, it is sent to the neutralization tank at the lower end of the neutralization tower through a diaphragm pump. The uncondensed non-condensable gas is collected and sent to the neutralization tower at the upper part of the neutralization tank for alkali absorption, and then filtered through the second-level activated carbon box and finally discharged. Specifically: The acid-containing condensate and non-condensable gas are deacidified by an alkali neutralization process. The alkali comes from the calcium hydroxide in the carbide slag. The carbide slag is configured with calcium hydroxide slurry, and the calcium hydroxide slurry is pumped into the neutralization tower by a spray pump to neutralize the HCl in the non-condensable gas. The gas treated by the neutralization tower is treated by a 2-stage activated carbon box and finally discharged. HCl is neutralized with calcium hydroxide to generate water and calcium chloride, which eventually enter the neutralization tank. Excess calcium hydroxide further neutralizes the HCl in the condensate. The generated calcium chloride solution is sent to the evaporator by a delivery pump to evaporate calcium chloride. The heat source for evaporation is one or more of steam, heat transfer oil, and hot water, and the evaporation temperature is 100-120°C. Example 2

[0025] This embodiment provides a phosphorus-containing waste solidification process, the process is as follows Figure 1 As shown, the specific steps include: (1) The phosphorus-containing waste is subjected to hydrolysis, filtration, impurity removal and catalytic oxidation treatment in sequence to obtain a hydrolyzate, specifically: ①Pump the phosphorus-containing waste into the waste liquid buffer tank through a pump. The phosphorus-containing waste includes the following components by mass: Trimethyl phosphite: 15.3%, dimethyl phosphite: 19%, monomethyl phosphite: 16%, dichloromethane: 6%, phosphorous acid: 15%, insoluble solid: 18%, the remainder is phosphorus trichloride, the sum of the above components is 100%.

[0026] ② The phosphorus-containing waste and water are mixed in a mass ratio of about 1:1 and then hydrolyzed in a hydrolysis kettle. The hydrolysis reaction temperature is controlled at 70°C for 1 hour, and then the temperature is raised to 100°C for another hour to decompose phosphorus trichloride, methyl phosphorus dichloride and other substances into phosphorous acid, hydrochloric acid and methanol; The main reaction formula is: PCl3+3H2O=H3PO3+3HCl (CH3)PCl2+3H2O+1 / 2O2=H3PO3+CH3OH+2HCl; ③ The solution is finely filtered to remove insoluble residues, and the filtered insoluble residues are landfilled in a hazardous waste landfill. A catalytic oxidant is added to the filtered solution for impurity removal and catalytic oxidation treatment; The catalytic oxidant used is Na2O2; the mass ratio of the catalytic oxidant to the phosphorus-containing waste is 5.3:100; (2) The hydrolyzate obtained in step (1) is concentrated to obtain a concentrated solution by centrifugation, specifically: ① After the hydrolysis is completed, slowly open the vacuum to make the final vacuum degree of the reactor -0.09MPa-0.095Mpa, and the final temperature in the reactor is 125℃, and then reduce the pressure and concentrate to evaporate the methanol and excess water after hydrolysis as much as possible; ② Pump the liquid in the reaction kettle into the crystallization kettle and concentrate it to 65°C for 4 hours. The vacuum degree at the end of concentration is -0.09-0.095Mpa. Put the liquid into the suction filter tank for suction filtration. After suction filtration, centrifuge the solid in the centrifuge until there is almost no liquid outflow; (3) The concentrated liquid after centrifugation is sent to the existing solidification system, with the mass ratio of the solidifying agent to the condensed liquid being 8:1-15:1, and solidified under the action of the solidifying agent calcium carbide slag and the solidification auxiliary agent bentonite, and the obtained calcium phosphate solidified body is put into the landfill for landfill; (4) The waste gas generated during the hydrolysis and concentration process of phosphorus-containing waste treatment is condensed by the existing supporting condenser, and most of the water, hydrogen chloride, methanol and dichloromethane are condensed into liquid and collected into the condensate collector. After the condensate is buffered in the collector, it is sent to the neutralization tank at the lower end of the neutralization tower through a diaphragm pump. The uncondensed non-condensable gas is collected and sent to the neutralization tower at the upper part of the neutralization tank for alkali absorption, and then filtered through the second-level activated carbon box and finally discharged. Specifically: The acid-containing condensate and non-condensable gas are deacidified by an alkali neutralization process. The alkali comes from the calcium hydroxide in the carbide slag. The carbide slag is configured with calcium hydroxide slurry, and the calcium hydroxide slurry is pumped into the neutralization tower by a spray pump to neutralize the HCl in the non-condensable gas. The gas treated by the neutralization tower is treated by a 2-stage activated carbon box and finally discharged. HCl is neutralized with calcium hydroxide to generate water and calcium chloride, which eventually enter the neutralization tank. Excess calcium hydroxide further neutralizes the HCl in the condensate. The generated calcium chloride solution is sent to the evaporator by a delivery pump to evaporate calcium chloride. The heat source for evaporation is one or more of steam, heat transfer oil, and hot water, and the evaporation temperature is 100-120°C. Example 3

[0027] This embodiment provides a phosphorus-containing waste solidification process, the process is as follows Figure 1 As shown, the specific steps include: (1) The phosphorus-containing waste is subjected to hydrolysis, filtration, impurity removal and catalytic oxidation treatment in sequence to obtain a hydrolyzate, specifically: ①Pump the phosphorus-containing waste into the waste liquid buffer tank through a pump. The phosphorus-containing waste includes the following components by mass: Trimethyl phosphite: 13.2%, dimethyl phosphite: 15%, monomethyl phosphite: 12%, dichloromethane: 4%, phosphorous acid: 12%, insoluble solid: 15%, the balance is phosphorus trichloride, the sum of the above components is 100%.

[0028] ② The phosphorus-containing waste and water are mixed in a mass ratio of about 1:5 and then hydrolyzed in a hydrolysis kettle. The hydrolysis reaction temperature is controlled at 45°C for 2.5 hours, and then the temperature is raised to 104°C for another hour to decompose phosphorus trichloride, methyl phosphorus dichloride and other substances into phosphorous acid, hydrochloric acid and methanol; The main reaction formula is: PCl3+3H2O=H3PO3+3HCl (CH3)PCl2+3H2O+1 / 2O2=H3PO3+CH3OH+2HCl; ③ The solution is finely filtered to remove insoluble residues, and the filtered insoluble residues are landfilled in a hazardous waste landfill. A catalytic oxidant is added to the filtered solution for impurity removal and catalytic oxidation treatment; The catalytic oxidant used is H2O2; the mass ratio of the catalytic oxidant to the phosphorus-containing waste is 3.5:100; (2) The hydrolyzate obtained in step (1) is concentrated to obtain a concentrated solution by centrifugation, specifically: ① After the hydrolysis is completed, slowly open the vacuum to make the final vacuum degree of the reactor -0.09MPa-0.095Mpa, and the final temperature in the reactor is 125℃, and then reduce the pressure and concentrate to evaporate the methanol and excess water after hydrolysis as much as possible; ② Pump the liquid in the reaction kettle into the crystallization kettle and concentrate it to 85°C for 2 hours. The vacuum degree at the end of concentration is -0.09-0.095Mpa. Put the liquid into the suction filter tank for suction filtration. After suction filtration, centrifuge the solid in the centrifuge until there is almost no liquid outflow; (3) The concentrated liquid after centrifugation is sent to the existing solidification system, with the mass ratio of the solidifying agent to the condensed liquid being 8:1-15:1, and solidified under the action of the solidifying agent calcium carbide slag and the solidification auxiliary agent microsilica powder to obtain a solidified calcium phosphate body which is sent to the landfill for landfilling; (4) The waste gas generated during the hydrolysis and concentration process of phosphorus-containing waste treatment is condensed by the existing supporting condenser, and most of the water, hydrogen chloride, methanol and dichloromethane are condensed into liquid and collected into the condensate collector. After the condensate is buffered in the collector, it is sent to the neutralization tank at the lower end of the neutralization tower through a diaphragm pump. The uncondensed non-condensable gas is collected and sent to the neutralization tower at the upper part of the neutralization tank for alkali absorption, and then filtered through the second-level activated carbon box and finally discharged. Specifically: The acid-containing condensate and non-condensable gas are deacidified by an alkali neutralization process. The alkali comes from the calcium hydroxide in the carbide slag. The carbide slag is configured with calcium hydroxide slurry, and the calcium hydroxide slurry is pumped into the neutralization tower by a spray pump to neutralize the HCl in the non-condensable gas. The gas treated by the neutralization tower is treated by a 2-stage activated carbon box and finally discharged. HCl is neutralized with calcium hydroxide to generate water and calcium chloride, which eventually enter the neutralization tank. Excess calcium hydroxide further neutralizes the HCl in the condensate. The generated calcium chloride solution is sent to the evaporator by a delivery pump to evaporate calcium chloride. The heat source for evaporation is one or more of steam, heat transfer oil, and hot water, and the evaporation temperature is 100-120°C.

[0029] The present invention uses phosphorus-containing waste in the production process of pesticide intermediates as a medium, and obtains a hydrolyzate through hydrolysis, precision filtration, catalytic oxidation and other treatments; and uses a curing agent and a curing auxiliary agent to solidify and stabilize the concentrated liquid obtained by hydrolysis, and finally forms a solid body that meets the entry requirements for landfill treatment. The present invention uses hydrolysis and catalytic oxidation to eliminate the reactivity of phosphorus-containing waste liquid to meet the landfill disposal requirements, and through calcium carbide slag solidification treatment, it achieves waste treatment with waste, realizes the stabilized disposal of phosphorus-containing and chlorine-containing waste liquid, and solves the industry pain point that the incineration system is easily corroded during the incineration process.

[0030] 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 process, characterized in that: The specific steps include: (1) The phosphorus-containing waste is subjected to hydrolysis, filtration, impurity removal, catalytic oxidation treatment in sequence to obtain a hydrolyzate; The hydrolysis reaction temperature is 45-70°C and the hydrolysis time is 0.5-2.5h; (2) concentrating the hydrolyzate obtained in step (1) to obtain a concentrate by centrifugation; The concentration treatment is reduced pressure concentration, the concentration temperature is 65-85° C., the concentration time is 2-4 hours, and the vacuum degree at the concentration endpoint is -0.081-0.098 Mpa; (3) The concentrated liquid after centrifugation is solidified under the action of a solidifying agent and a solidifying auxiliary agent to obtain a calcium phosphate solidified body for landfilling.

2. The phosphorus-containing waste solidification process according to claim 1, characterized in that: The phosphorus-containing waste in step (1) includes phosphorus-containing waste liquid and phosphorus-containing waste residue, and the phosphorus-containing waste includes the following components by mass: Trimethyl phosphite: 8.3%~15.3%, dimethyl phosphite: 12%~19%, monomethyl phosphite: 8%~16%, dichloromethane: 1%~6%, phosphorous acid: 10%~15%, insoluble solids: 13%~18%, the remainder is phosphorus trichloride, the sum of the above components is 100%.

3. The phosphorus-containing waste solidification process according to claim 1, characterized in that: During the hydrolysis in step (1), the mass ratio of phosphorus-containing waste to water is 1:1-1:

5.

4. The phosphorus-containing waste solidification process according to claim 1, characterized in that: The catalytic oxidant used in the impurity removal catalytic oxidation is one of K2O2, Na2O2, and H2O2.

5. The phosphorus-containing waste solidification process according to claim 4, characterized in that: The mass ratio of the catalytic oxidant to the phosphorus-containing waste is (2.1-5.3):

100.

6. The phosphorus-containing waste solidification process according to claim 1, characterized in that: The curing agent is one or more of cement, lime, gypsum and carbide slag.

7. The phosphorus-containing waste solidification process according to claim 1, characterized in that: The curing auxiliary agent includes one or more of a chelating agent, a retarder, an antifreeze agent, an accelerator, and an adsorbent.

8. The phosphorus-containing waste solidification process according to claim 1, characterized in that: In step (3) of treating phosphorus-containing waste, the mass ratio of the curing agent to the condensed liquid is 8:1-15:

1.

9. The phosphorus-containing waste solidification process according to claim 1, characterized in that: During the treatment of phosphorus-containing waste, the waste gas generated during the hydrolysis and concentration process is condensed and then neutralized. The neutralized tail gas is treated in an activated carbon box and then discharged. The neutralized waste liquid is evaporated to obtain calcium chloride.

10. The phosphorus-containing waste solidification process according to claim 9, characterized in that: During the neutralization treatment, carbide slag is added for neutralization; during the evaporation, the heat source for evaporation is one or more of steam, heat transfer oil, and hot water, and the evaporation temperature is 100-120°C.

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