System for efficiently treating yellow phosphorus muddy water

Abstract

A system for efficiently treating yellow phosphorus muddy water comprises a process water tank, phosphorus muddy water to be treated is added into the process water tank and evenly mixed with calcium hydroxide through a stirring pump, the outlet end of the process water tank is connected with an inclined pipe feeding adjusting groove, and the inclined pipe feeding adjusting groove is connected with an inclined pipe settler through an inclined pipe feeding pump. A top outlet of the inclined tube settler is connected with a process water tank, the process water tank conveys liquid in the tank to a yellow phosphorus working section for use through a process water pump, a bottom outlet of the inclined tube settler is connected with an inclined tube underground thick slurry tank, and the inclined tube underground thick slurry tank conveys thick slurry in the tank to a stacked screw machine for treatment. The calcium hydroxide is used for removing solid dust particles and fluorides in the yellow phosphorus muddy water, the treatment capacity can reach 70% or above, the use amount of sodium carbonate is reduced, meanwhile, sedimentation of the solid dust particles in the yellow phosphorus muddy water is facilitated, and labor and time cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of yellow phosphorus sludge water treatment, in particular to a system for efficiently treating yellow phosphorus sludge water. Background Art

[0002] A large amount of phosphorus-containing wastewater is generated during the production process of yellow phosphorus. The main sources of yellow phosphorus are: first, spray water from the three towers of yellow phosphorus in the electric furnace; second, spray water from the three towers of coal gas; third, PDS desulfurization wastewater; fourth, excess water from the flue gas alkali washing pool; fifth, excess water from the phosphorus vapor flue gas alkali washing tower spray and phosphorus vapor electrostatic demister flushing water; sixth, desulfurization electrostatic demister flushing water. The composition of yellow phosphorus wastewater is relatively complex, mainly containing harmful substances such as elemental phosphorus, cyanide, and fluoride. In addition, the wastewater has a high content of suspended solids and high acidity. Removing phosphorus-containing wastewater in the production process of yellow phosphorus is often complicated and inefficient, and consumes a large amount of soda ash, making the treatment cost abnormally high, reducing the competitiveness of yellow phosphorus products. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a system for efficiently treating yellow phosphorus sludge water, which can effectively remove suspended matter, fluoride and the like in the sludge water.

[0004] A system for efficiently treating yellow phosphorus sludge water comprises a process water tank, wherein the sludge water to be treated is added into the process water tank and evenly mixed with calcium hydroxide through a stirring pump, wherein the outlet end of the process water tank is connected with an inclined tube feeding regulating tank, wherein the inclined tube feeding regulating tank is connected with an inclined tube settler through an inclined tube feeding pump, wherein the top outlet of the inclined tube settler is connected with a process water tank, wherein the process water tank conveys the liquid in the tank to a yellow phosphorus section for use through the process water pump, wherein the bottom outlet of the inclined tube settler is connected with an inclined tube underground thick slurry tank, wherein the inclined tube underground thick slurry tank conveys the thick slurry in the tank to a screw stacking machine for treatment.

[0005] The above-mentioned process water tanks are provided with three in sequence, which are connected together through a discharge pump. A feeder is provided above the first process water tank, and the feeder is used to add calcium hydroxide.

[0006] The above-mentioned inclined tube feeding regulating tank is provided with a stirring pump.

[0007] The clear liquid pipeline at the outlet of the above-mentioned snail stacking machine is connected to the inclined tube feeding regulating tank, the thick slurry pipeline is connected to the phosphorus mud intermediate water tank of the snail stacking machine, and the phosphorus mud intermediate water tank of the snail stacking machine is provided with a conveying pump connected to the rotary kiln.

[0008] The above-mentioned process water tank is connected to the electric furnace of the yellow phosphorus section through a process water pump.

[0009] The utility model provides a system for efficiently treating yellow phosphorus sludge water. The device uses calcium hydroxide to remove solid dust particles and fluoride in the yellow phosphorus sludge water. The treatment capacity can reach more than 70%, which reduces the amount of soda ash used and is beneficial to the sedimentation of solid dust particles in the yellow phosphorus sludge water, saving labor and time costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0011] Figure 1 It is a structural schematic diagram of the yellow phosphorus sludge water treatment system of the utility model.

[0012] In the figure: process water tank 1, feeder 2, discharge pump 3, stirring pump 4, inclined tube feed regulating tank 5, inclined tube feed pump 6, inclined tube settler 7, process water tank 8, inclined tube underground thick slurry tank 9, process water pump 10, screw stacking machine 11, screw stacking machine phosphorus mud intermediate water tank 12. DETAILED DESCRIPTION

[0013] The technical solution of the present utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0014] like Figure 1 As shown in the figure, a system for efficiently treating yellow phosphorus sludge water comprises a process water tank 1, the sludge water to be treated is added into the process water tank 1, and is evenly mixed with calcium hydroxide through a stirring pump 4, the outlet end of the process water tank 1 is connected to an inclined tube feed regulating tank 5, the inclined tube feed regulating tank 5 is connected to an inclined tube settler 7 through an inclined tube feed pump 6, the top outlet of the inclined tube settler 7 is connected to a process water tank 8, the process water tank 8 transports the liquid in the tank to the yellow phosphorus section for use through a process water pump 10, the bottom outlet of the inclined tube settler 7 is connected to an inclined tube underground thick slurry tank 9, and the inclined tube underground thick slurry tank 9 transports the thick slurry in the tank to a screw stacking machine 11 for treatment.

[0015] The above-mentioned process water tanks 1 are provided in sequence in three numbers and are connected together by a discharge pump 3 . A feeder 2 is provided above the first process water tank 1 , and the feeder 2 is used for adding calcium hydroxide.

[0016] The above-mentioned inclined tube feeding regulating tank 5 is provided with a stirring pump 4 .

[0017] The clear liquid pipeline at the outlet of the above-mentioned snail stacking machine 11 is connected to the inclined tube feeding regulating tank 5, and the thick slurry pipeline is connected to the phosphorus mud intermediate water tank 12 of the snail stacking machine. The phosphorus mud intermediate water tank 12 of the snail stacking machine is provided with a conveying pump connected to the rotary kiln.

[0018] The separated concentrated slurry is pumped to the rotary kiln for treatment through the screw stacker 11, and the clear liquid is returned to the inclined tube settler 7 for treatment.

[0019] The process water tank 8 is connected to the electric furnace of the yellow phosphorus section through a process water pump 10 .

[0020] Working principle:

[0021] like Figure 1 As shown in the figure, the main equipment includes feeder, process water tank, inclined tube feed regulating tank, inclined tube settler, process water tank, inclined tube underground thick slurry tank, snail stacker, snail stacker dry mud conveying pump and stirring pump; after adding a certain proportion of calcium hydroxide in the process water tank, the phosphorus-containing wastewater from the electric furnace passes through three-stage process water tank reaction in sequence, and then enters the inclined tube feed regulating tank, and is pumped to the inclined tube settler for solid-liquid separation. The supernatant enters the process water tank and is pumped to the yellow phosphorus section for recycling. The underflow enters the inclined tube underground thick slurry tank and is pumped into the snail stacker for solid-liquid separation again. The separated thick slurry is pumped to the rotary kiln for treatment, and the clear liquid returns to the inclined tube settler for treatment.

[0022] Example 1

[0023] The phosphorus sludge water containing yellow phosphorus (PH=5.04) enters the process water tank, and at the same time, calcium hydroxide powder is added to form a 0.17% calcium hydroxide solution by weight, and stirred (pretreatment). The pretreated yellow phosphorus sludge water is then transferred to the inclined tube sedimentation adjustment tank, and then enters the inclined tube settler for treatment. The process water taken from the process water tank is measured to have a PH=5.11. The PH change is 0.07.

[0024] Example 2

[0025] The phosphorus sludge water containing yellow phosphorus (PH=5.02) enters the process water tank, and at the same time, calcium hydroxide powder is added to form a 0.33% calcium hydroxide solution by weight, and stirred (pretreatment). The pretreated yellow phosphorus sludge water is then transferred to the inclined tube sedimentation adjustment tank, and then enters the inclined tube settler for treatment. The process water taken from the process water tank is measured to have a PH value of 5.32. The PH change is 0.30.

[0026] Example 3

[0027] The phosphorus sludge water containing yellow phosphorus (PH=5.04) enters the process water tank, and at the same time, calcium hydroxide powder is added to form a 0.67% calcium hydroxide solution by weight, and stirred (pretreatment). The pretreated yellow phosphorus sludge water is then transferred to the inclined tube sedimentation adjustment tank, and then enters the inclined tube settler for treatment. The process water taken from the process water tank is measured to have a PH=5.51. The PH change is 0.47.

[0028] Example 4

[0029] The phosphorus sludge water containing yellow phosphorus (PH=5.05) enters the process water tank, and at the same time, calcium hydroxide powder is added to form a 0.67% calcium hydroxide solution by weight, and stirred (pretreatment). The pretreated yellow phosphorus sludge water is then transferred to the inclined tube sedimentation adjustment tank, and then enters the inclined tube settler for treatment. The process water taken from the process water tank is measured to have a PH=5.53. The PH change is 0.48.

Claims

1. A system for efficiently treating yellow phosphorus sludge water, Its characteristics are: The invention comprises a process water tank (1), wherein phosphorus sludge water to be treated is added into the process water tank (1) and uniformly mixed with calcium hydroxide through a stirring pump (4); the outlet end of the process water tank (1) is connected to an inclined tube feed regulating tank (5); the inclined tube feed regulating tank (5) is connected to an inclined tube settler (7) through an inclined tube feed pump (6); the top outlet of the inclined tube settler (7) is connected to a process water tank (8); the process water tank (8) transports liquid in the tank to a yellow phosphorus section for use through a process water pump (10); the bottom outlet of the inclined tube settler (7) is connected to an inclined tube underground thick slurry tank (9); the inclined tube underground thick slurry tank (9) transports the thick slurry in the tank to a screw stacking machine (11) for treatment.

2. A system for efficiently treating yellow phosphorus sludge water according to claim 1, It is characterized in that The process water tanks (1) are provided in sequence with three of them, which are connected together via a discharge pump (3). A feeder (2) is provided above the first process water tank (1), and the feeder (2) is used to add calcium hydroxide.

3. A system for efficiently treating yellow phosphorus sludge water according to claim 2, It is characterized in that The inclined tube feed regulating tank (5) is provided with a stirring pump (4).

4. A system for efficiently treating yellow phosphorus sludge water according to claim 3, It is characterized in that The clear liquid pipeline at the outlet of the snail stacking machine (11) is connected to the inclined tube feeding regulating tank (5), and the thick slurry pipeline is connected to the phosphorus mud intermediate water tank (12) of the snail stacking machine. The phosphorus mud intermediate water tank (12) of the snail stacking machine is provided with a delivery pump connected to the rotary kiln.

5. A system for efficiently treating yellow phosphorus sludge water according to claim 4, It is characterized in that The process water tank (8) is connected to the electric furnace of the yellow phosphorus section via a process water pump (10).

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