Device and method for recycling phosphorus-containing wastewater in vacuum system of vacuum rectification of yellow phosphorus

A vacuum rectification and vacuum system technology, applied in vacuum distillation, fractionation, etc., can solve the problems of production system fluctuations, high production pressure, high processing costs, etc., and achieve the effect of ensuring continuous normal operation and normal and stable negative pressure

Active Publication Date: 2021-06-29
HUBEI SINOPHORUS ELECTRONIC MATERIALS CO LTD
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  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the domestic high-purity yellow phosphorus production technology mainly uses the principle of rectification to remove heavy metal ions (heavy components) in yellow phosphorus, and the rectification vacuum system device uses a water ring vacuum pump. The operation of the vacuum pump is often caused by the high temperature of the working fluid. The vacuum degree of the system is unstable, which leads to fluctuations in the entire production system, which seriously affects the normal start-up of yellow phosphorus distillation
In order to ensure the normal operation of the vacuum pump, it is necessary to continuously add clean water to replace the working fluid of the vacuum pump, which will generate a large amount of yellow phosphorus wastewater. Under the current severe environmental protection situation, the production pressure is huge, and the treatment of phosphorus-containing wastewater is difficult and the treatment cost is very high.

Method used

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  • Device and method for recycling phosphorus-containing wastewater in vacuum system of vacuum rectification of yellow phosphorus
  • Device and method for recycling phosphorus-containing wastewater in vacuum system of vacuum rectification of yellow phosphorus
  • Device and method for recycling phosphorus-containing wastewater in vacuum system of vacuum rectification of yellow phosphorus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Such as figure 1 A yellow phosphorus decompression rectification vacuum system is shown as a device for treating phosphorus-containing wastewater. The device includes a phosphorus-containing wastewater collection tank 1, a cold water tank 2, a cold water tank 4, a heat exchanger 3, a water chiller 6, and a vacuum water tank. 5. Phosphorus-containing waste water collection tank 1 is connected to cold water tank 1 2; cold water tank 1 2 is connected to heat exchanger 3, heat exchanger 3 is connected to cold water tank 2 4, cold water tank 2 4 is connected to vacuum water tank 5, and vacuum water tank 5 Together with the phosphorus-containing wastewater collection tank 1, a circulation pipeline is formed.

[0037] Cold water tank one 2 is also connected with cold water tank two 4, and cold water tank two 4 is connected with chiller 6, and chiller 6 is connected with cold water tank one 2, and cold water tank one 2 is connected with cold water tank two 4 to form a circulati...

Embodiment 2

[0042] The method for recycling phosphorus-containing wastewater using the device of Example 1 (see the appendix to the description for the device corresponding to the method) figure 1 ), the specific steps are:

[0043] (1) Send the wastewater in the phosphorus-containing wastewater collection tank 1 to the cold water tank-2;

[0044] (2) Turn on the delivery pump from the cold water tank 1 to the heat exchanger 3, and cool the cold water by 25°C in the heat exchanger 3;

[0045] (3) Part of the cooling water cooled by the heat exchanger 3 enters the coil of the cold water tank 2 4 and is cooled to 12°C again; part of it enters the cold water tank 1 2, which can reduce the phosphorus-containing wastewater from the phosphorus-containing wastewater collection tank to 32°C;

[0046] (4) The cooling water in the cold water tank 2 enters the chiller 6 through the transfer pump to cool down by 12°C. After cooling, part of it enters the heat exchanger 3 as the cooling water for th...

Embodiment 3

[0051] Embodiment 3 (the corresponding device of this method is shown in the description attached figure 1 )

[0052] (1) Send the wastewater in the phosphorus-containing wastewater collection tank to the cold water tank one;

[0053] (2) Turn on the transfer pump from the second cold water tank to the heat exchanger, and cool the cold water by 25°C in the heat exchanger;

[0054] (3) The second cooling water of the cold water tank is sent to the chiller, the parameters are set, the set temperature is 15°C, and the refrigerant outlet water is 15°C for cooling;

[0055] (4) Open the valve on the cooling water delivery pipe, pass part of the cooling water of the chiller into the tube heat exchanger, and then into the second cold water tank; the other part enters the first coil of the cold water tank, and then returns to the second cold water tank;

[0056] (5) Phosphorus-containing waste water in the cold water tank is cooled by the internal coil, enters the heat exchanger, open...

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Abstract

The invention discloses a device and method for recycling phosphorus-containing waste water in a yellow phosphorus decompression rectification vacuum system. The device comprises a phosphorus-containing waste water collection tank, a cold water tank one, a heat exchanger, a cold water tank two, a vacuum water tank, and a water chiller; It is characterized in that the phosphorus-containing wastewater collection tank is connected to the first cold water tank; the first cold water tank is connected to the heat exchanger, the heat exchanger is connected to the second cold water tank, the second cold water tank is connected to the vacuum water tank, the vacuum water tank is connected to the phosphorus-containing wastewater collection tank, Form a circulation line. The device is simple in structure and highly efficient in recycling. The invention also discloses a method for recycling phosphorus-containing waste water in a yellow phosphorus decompression rectification vacuum system. After the phosphorus-containing waste water is collected, it undergoes three-stage cooling and recycling. The cooling effect is good, the vacuum pump operates normally, the rectification system is stable, and no clean water is added. and waste water, which solves the problem of unstable vacuum in the rectification system and the generation of phosphorus-containing waste water.

Description

technical field [0001] The invention belongs to the field of environmental protection and recycling of yellow phosphorus wastewater, and in particular relates to a device and method for recycling phosphorus-containing wastewater in a yellow phosphorus vacuum rectification vacuum system. Background technique [0002] At present, the domestic high-purity yellow phosphorus production technology mainly uses the principle of rectification to remove heavy metal ions (heavy components) in yellow phosphorus, and the rectification vacuum system device uses a water ring vacuum pump. The operation of the vacuum pump is often caused by the high temperature of the working fluid. The vacuum degree of the system is unstable, which leads to fluctuations in the entire production system, which seriously affects the normal start-up of yellow phosphorus distillation. In order to ensure the normal operation of the vacuum pump, it is necessary to continuously add clean water to replace the workin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D3/10B01D3/14B01D3/32
CPCB01D3/10B01D3/14B01D3/32
Inventor 李少平杜林汪鹏段昌圣万永洲陈辉刚姜飞郭岚峰廖义岳兵徐昊
Owner HUBEI SINOPHORUS ELECTRONIC MATERIALS CO LTD
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