WO2022016633A1

WO2022016633A1 - High-quality water treatment process specifically for chemical production

Info

Publication number: WO2022016633A1
Application number: PCT/CN2020/108860
Authority: WO
Inventors: 薄纯金; 宋朋斌; 张延军; 王国力
Original assignee: 山东海益化工科技有限公司
Priority date: 2020-07-23
Filing date: 2020-08-13
Publication date: 2022-01-27
Also published as: CN111777210A

Abstract

A high-quality water treatment process specifically for chemical production, the process comprising the following steps: sending raw water into a quartz sand filtering tank through a Y-shaped filter, with an anthracite filter material and a quartz sand filter material being arranged in the quartz sand filtering tank; sending the water from the filtration treatment, via the quartz sand filtering tank, into an active carbon filter, with a supporting layer of quartz sand and an active carbon filter being arranged in the active carbon filter; sending the water from the filtration treatment, via the active carbon filter, into a precision filter, with multiple filter elements being arranged in the precision filter; and after subjecting same to the filtration treatment via the precision filter, sending the water to an intermediate water tank for later use. The treated water has a turbidity of not greater than 0.1 NTU, an organic matter COD of not greater than 3 mg/L, heavy metal ions, such as iron and manganese, each not being greater than 0.05 mg/L, and not greater than 150 mg/L of a sulfate. A chemical product is prepared with this high-quality water, which improves the qualities such as the appearance and performances of the prepared chemical product and improves the value of the product. In addition, the process is simple, and the water treatment efficiency is relatively high, which ensures the amount of water required for chemical production.

Description

High-quality water treatment process for chemical production

technical field

The invention relates to the technical field of water treatment, in particular to a special high-quality water treatment process for chemical production.

Background technique

In chemical production, raw water such as groundwater, surface water, and urban polluted reclaimed water is generally used as the production water for chemical products. However, the turbidity of raw water is high, the refinement system is not enough, and the organic matter content will vary with human production activities and seasonal changes. There are huge differences. Impurities such as suspended solids, colloids, pigments, organic matter and other heavy metals in raw water can easily affect the appearance and performance of chemical products and reduce the value of products. It is a technical problem to be solved urgently to meet the production demand of chemical products with high water for chemical production.

SUMMARY OF THE INVENTION

The present invention aims to solve at least one of the technical problems existing in the prior art or related technologies.

Therefore, the purpose of the present invention is to provide a special high-quality water treatment process for chemical production, filter and refine raw water through quartz sand filter tanks, activated carbon filters, precision filters, etc., remove impurities, ensure water supply, and then improve The appearance, performance and other qualities of the manufactured chemical products enhance the value of the products.

In order to achieve the above purpose, the technical scheme of the present invention provides a special high-quality water treatment process for chemical production, comprising the following steps:

The raw water is fed into the quartz sand filter tank through the Y-type filter. The quartz sand filter tank has built-in anthracite filter material and quartz sand filter material. The anthracite filter material has a particle size of 0.8mm-1.8mm and anthracite filter material thickness of 200mm-500mm , the particle size of the quartz sand filter material is 1mm-2mm, the thickness of the filter material is 600mm-800mm, the raw water inlet pressure is 0.3MPa-0.35MPa, and the raw water flow rate is not less than 5m ³ /hr;

The water filtered and processed by the quartz sand filter tank is sent to the activated carbon filter, and the activated carbon filter has built-in support layer quartz sand and activated carbon filter material;

The water filtered and processed by the activated carbon filter is sent to a precision filter, and a plurality of filter elements are built in the precision filter. Standby, the water flow rate from the precision filter is 4m ³ /hr.

Preferably, the precision filter is 40 inches with 5 built-in filter elements. .

Preferably, the water filtered by the quartz sand filter tank is pressurized by a pressurizing pump before being sent to the activated carbon filter to ensure that the water inlet pressure is not lower than 0.3MPa;

The water filtered and processed by the activated carbon filter is pressurized by a pressurizing pump before being sent to the precision filter to ensure that the water inlet pressure is not lower than 0.3MPa.

Preferably, the granularity of the activated carbon filter material in the activated carbon filter is 10-30 mesh, and the thickness of the filter material is 1500mm-1800mm.

Preferably, the quartz sand of the support layer in the activated carbon filter has a particle size of 1.0mm-1.8mm and a thickness of 300mm-500mm.

Preferably, the special high-quality water treatment process for chemical production further includes: when the liquid level of the intermediate water tank is higher than the first preset liquid level, closing the raw water inlet valve and stopping the conveying of raw water;

When the liquid level of the intermediate water tank is lower than the second preset liquid level, the raw water inlet valve is opened to transport the raw water for treatment.

The special high-quality water treatment process for chemical production proposed by the present invention has the following beneficial technical effects:

(1) The impurities with large particle size such as suspended solids and colloids in the raw water are effectively removed by the quartz sand filter tank, and the pigments, organic substances and other heavy metals in the raw water are effectively removed by the activated carbon filter, and the precision filter is effective. Impurities such as inorganic salts are removed, thereby obtaining special water for chemical production with higher quality. The turbidity of the water obtained by the special high-quality water treatment process for chemical production proposed by the present invention is not more than 0.1NTU, and the COD of organic matter is not more than 3mg/L , heavy metal ions such as iron and manganese are not more than 0.05mg/L, and sulfate is not more than 150mg/L. The chemical products are prepared with high-quality water, which improves the appearance and performance of the chemical products produced, and enhances the value of the product. Moreover, the process is simple, the water treatment efficiency is high, and the water quantity required for chemical production is guaranteed.

(2) Pressure treatment is carried out in the water treatment process, which ensures the water inlet pressure of each filter device, and ensures the water treatment efficiency and sufficient water supply while ensuring the water treatment effect.

(3) The start and stop of the water treatment process is controlled by the liquid level of the intermediate water tank. On the one hand, it ensures the water demand for chemical production, and on the other hand, reduces the occurrence of water quality deterioration caused by the long storage time of water. .

Additional aspects and advantages of the present invention will be presented in the description which follows, in part, which will become apparent from the following description, or may be learned by practice of the invention.

detailed description

The invention discloses a special high-quality water treatment process for chemical production, and those skilled in the art can learn from the content of this article and appropriately improve process parameters to achieve. It should be particularly pointed out that all similar substitutions and modifications are obvious to those skilled in the art, and they are deemed to be included in the present invention. The method and application of the present invention have been described through the preferred embodiments, and it is obvious that relevant persons can make changes or appropriate changes and combinations of the methods and applications described herein without departing from the content, spirit and scope of the present invention to achieve and Apply the technology of the present invention.

Below in conjunction with embodiment, the present invention is further elaborated:

Example 1

The raw water is fed into the quartz sand filter tank through the Y-type filter. The quartz sand filter tank has built-in anthracite filter material and quartz sand filter material. The particle size of the material is 1mm-2mm, the thickness of the filter material is 700mm, the raw water inlet pressure is 0.3MPa-0.35MPa, the raw water flow rate is 5m ³ /hr, and the raw water temperature is 25°C;

The water filtered by the quartz sand filter tank is pressurized to 0.3MPa-0.35MPa by the pressure pump and then sent to the activated carbon filter. The activated carbon filter has built-in support layer quartz sand and activated carbon filter material, and the support layer quartz sand particle size It is 1.0mm-1.8mm, the thickness is 400mm, the particle size of the activated carbon filter material is 10-30 mesh, and the thickness of the filter material is 1600mm;

The water filtered by the activated carbon filter is pressurized to 0.3MPa-0.35MPa by the pressure pump and then sent to the precision filter. The precision filter is 40 inches with 5 built-in filter elements. After filtering, it is sent to the intermediate water tank for standby use, and the water flow rate from the precision filter is 4m ³ /hr.

After treatment, the turbidity of the water quality parameters decreased from 3NTU to 0.05NTU, the COD content of organic matter decreased from 38.5mg/L to 2.8mg/L, the iron content decreased from 0.3mg/L to 0.05mg/L, and the manganese content decreased from 0.1mg/L It dropped to 0.05mg/L, the sulfate content dropped from 249mg/L to 148mg/L, and the water quality was greatly improved, meeting the water demand for chemical production.

Example 2

The raw water is sent to the quartz sand filter tank through the Y-type filter. The quartz sand filter tank has built-in anthracite filter material and quartz sand filter material. The particle size of the material is 1mm-2mm, the thickness of the filter material is 800mm, the raw water inlet pressure is 0.3MPa-0.35MPa, the raw water flow rate is 6m ³ /hr, and the raw water temperature is 25°C;

The water filtered by the quartz sand filter tank is sent to the activated carbon filter. The activated carbon filter has a built-in support layer of quartz sand and activated carbon filter material. The particle size of the support layer of quartz sand is 1.0mm-1.8mm and the thickness is 500mm. The particle size of the material is 10-30 mesh, and the thickness of the filter material is 1800mm;

The water filtered by the activated carbon filter is sent to the precision filter. The precision filter is 40 inches with 5 built-in filter elements. The pore size of the filter element is 5μm. The effluent flow is 4m ³ /hr.

After treatment, the turbidity of the water quality parameters decreased from 3NTU to 0.08NTU, the organic content COD decreased from 39.4mg/L to 2.9mg/L, the iron content decreased from 0.3mg/L to 0.05mg/L, and the manganese content decreased from 0.1mg/L It dropped to 0.05mg/L, the sulfate content dropped from 238mg/L to 149mg/L, and the water quality was greatly improved, meeting the water demand for chemical production.

Example 3

The raw water is sent to the quartz sand filter tank through the Y-type filter. The quartz sand filter tank has built-in anthracite filter material and quartz sand filter material. The particle size of the material is 1mm-2mm, the thickness of the filter material is 600mm, the raw water inlet pressure is 0.3MPa-0.35MPa, the raw water flow rate is 5m ³ /hr, and the raw water temperature is 25°C;

The water filtered by the quartz sand filter tank is pressurized to 0.3MPa-0.35MPa by the pressure pump and then sent to the activated carbon filter. The activated carbon filter has built-in support layer quartz sand and activated carbon filter material, and the support layer quartz sand particle size It is 1.0mm-1.8mm, the thickness is 300mm, the particle size of the activated carbon filter material is 10-30 mesh, and the thickness of the filter material is 1500mm;

The water filtered by the activated carbon filter is pressurized to 0.3MPa-0.35MPa by the pressure pump and then sent to the precision filter. The precision filter is a 40-inch built-in 5 filter elements, and the pore size of the filter element is 5μm. After filtering, it is sent to the intermediate water tank for standby use, and the water flow rate from the precision filter is 4m ³ /hr.

After treatment, the turbidity of the water quality parameters decreased from 3NTU to 0.1NTU, the organic content COD decreased from 40mg/L to 3mg/L, the iron content decreased from 0.3mg/L to 0.05mg/L, and the manganese content decreased from 0.1mg/L to 0.1mg/L. 0.05mg/L, the sulfate content has dropped from 246mg/L to 150mg/L, the water quality has been greatly improved, and the water demand of chemical production has been met.

Further, when the liquid level of the intermediate water tank is higher than the first preset liquid level height, the raw water inlet valve is closed to stop conveying the raw water; when the liquid level of the intermediate water tank is lower than the second preset liquid level height When the raw water inlet valve is opened, the raw water is transported for treatment. The height of the first preset liquid level is 5/6 of the height of the intermediate water tank, and the height of the second preset liquid level is 1/6 of the height of the intermediate water tank. Guarantee the water demand of chemical production, and reduce the occurrence of water quality deterioration caused by the long storage time of water.

The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications can be made. It should be regarded as the protection scope of the present invention.

Claims

A special high-quality water treatment process for chemical production, characterized in that it comprises the following steps:

The raw water is fed into the quartz sand filter tank through the Y-type filter. The quartz sand filter tank has built-in anthracite filter material and quartz sand filter material. The anthracite filter material has a particle size of 0.8mm-1.8mm and anthracite filter material thickness of 200mm-500mm , the particle size of the quartz sand filter material is 1mm-2mm, the thickness of the filter material is 600mm-800mm, the raw water inlet pressure is 0.3MPa-0.35MPa, and the raw water flow rate is not less than 5m 3 /hr;

The water filtered and processed by the quartz sand filter tank is sent to the activated carbon filter, and the activated carbon filter has built-in support layer quartz sand and activated carbon filter material;

The water filtered and processed by the activated carbon filter is sent to a precision filter, and a plurality of filter elements are built in the precision filter. Standby, the water flow rate from the precision filter is 4m 3 /hr.
The special high-quality water treatment process for chemical production according to claim 1, characterized in that,

The precision filter is 40 inches and has 5 built-in filter elements.
The special high-quality water treatment process for chemical production according to claim 1, characterized in that,

The water filtered and processed by the quartz sand filter tank is pressurized by a pressurizing pump before being sent to the activated carbon filter to ensure that the water inlet pressure is not lower than 0.3MPa;

The water filtered and processed by the activated carbon filter is pressurized by a pressurizing pump before being sent to the precision filter to ensure that the water inlet pressure is not lower than 0.3MPa.
The special high-quality water treatment process for chemical production according to claim 1, characterized in that,

The granularity of the activated carbon filter material in the activated carbon filter is 10-30 mesh, and the thickness of the filter material is 1500mm-1800mm.
The special high-quality water treatment process for chemical production according to claim 1, characterized in that,

The quartz sand of the support layer in the activated carbon filter has a particle size of 1.0mm-1.8mm and a thickness of 300mm-500mm.
The special high-quality water treatment process for chemical production according to claim 1, further comprising:

When the liquid level of the intermediate water tank is higher than the first preset liquid level, the raw water inlet valve is closed, and the raw water is stopped;

When the liquid level of the intermediate water tank is lower than the second preset liquid level, the raw water inlet valve is opened to transport the raw water for treatment.