CN112645417A

CN112645417A - Stain remover

Info

Publication number: CN112645417A
Application number: CN201910967688.3A
Authority: CN
Inventors: 惠星瑶; 孙洋; 常妍; 张彤; 陈滢莹; 刘恒
Original assignee: Shaanxi Xialin Biotechnology Co ltd
Current assignee: Shaanxi Xialin Biotechnology Co ltd
Priority date: 2019-10-12
Filing date: 2019-10-12
Publication date: 2021-04-13

Abstract

The invention discloses a stain remover, which is characterized in that the treating agent contains Al⁺⁺⁺、Fe⁺⁺⁺And Mg⁺⁺And a small amount of Mn²⁺And lithopone, the content of Al⁺⁺⁺Account for

Fe⁺⁺⁺Account for

Mg⁺⁺Account for

Mixing by common method, collecting a certain amount of water, adding appropriate amount of aluminum sulfate (purity more than 95%)>Iron sulfate (purity more than 95%), magnesium sulfate (purity more than 95%)>Manganese sulfate (with purity of more than 95%) and lithopone are stirred uniformly at room temperature to be completely dissolved; the Al is⁺⁺⁺、Fe⁺⁺⁺、Mg⁺⁺The optimal proportion of the components is as follows: al (Al)⁺⁺⁺40% of Fe⁺⁺⁺10% of Mg⁺⁺40% of Mn²⁺6 percent of lithopone and 4 percent of lithopone.

Description

Stain remover

Technical Field

The invention belongs to the technical field of environmental protection.

Background

The chemical precipitation method is widely used in sewage treatment, and is a method for removing pollutants in water by adding certain chemical agents into the wastewater to perform chemical reaction with the pollutants in the wastewater to form insoluble solid products and then performing liquid-liquid separation. At present, in some industries, such as coal slime water, oil-containing wastewater of oil fields, printing and dyeing wastewater, papermaking wastewater and other adopted medicaments, the treatment effect is poor, the sedimentation speed is slow, the medicament cost is higher, and some enterprises still cause serious corrosion of equipment.

In the production of coal mines, a large amount of coal slurry water is produced, and serious pollution is caused if the water is not treated in time. The existing coal slime water treatment method adopts a chemical agent treatment method, polyaluminium chloride or calcium chloride and polyacrylamide are added into the coal slime water for combined use, and precipitation treatment is carried out. Due to the introduction of a large amount of chloride ions, severe corrosion of the equipment results.

The produced water of the oil field oil recovery plant is recovered from an oil layer along with crude oil, the wastewater carries the crude oil, various salts and gases in the stratum flow into the high-temperature high-pressure oil layer, and a plurality of suspended solids are carried out from the stratum in the oil recovery process, so that the produced water of the oil field has the characteristics of high COD (chemical oxygen demand) and oil content, high temperature and high mineralization degree. At present, the treatment is carried out by a chemical-adding precipitation filtration method, the chemical-adding is mostly polymeric aluminum, the common problems are that the treatment effect is poor, and the treatment is carried out by a biochemical method at the back side.

Disclosure of Invention

In order to solve the existing defects, the invention mainly aims to provide a stain remover which has the advantages of high efficiency, low cost, wide application range, no corrosion and no toxicity.

In order to achieve the purpose, the stain remover adopts the following technical scheme:

a stain remover is characterized in that the treating agent contains Al⁺⁺⁺、Fe⁺⁺⁺And Mg⁺⁺And a small amount of Mn²⁺And lithopone, the content of Al⁺⁺⁺Account for

Fe⁺⁺⁺Account for

Mg⁺⁺Account for

Mixing with water, adding appropriate amount of aluminum sulfate (more than 95% purity), ferric sulfate (more than 95% purity), magnesium sulfate (more than 95% purity), manganese sulfate (more than 95% purity) and lithopone, and stirring at room temperature to dissolve completely.

The Al is⁺⁺⁺、Fe⁺⁺⁺、Mg⁺⁺The optimal proportion of the components is as follows: al (Al)⁺⁺⁺40% of Fe⁺⁺⁺10% of Mg⁺⁺40% of Mn²⁺6 percent of lithopone and 4 percent of lithopone.

The invention adopting the technical scheme has the following beneficial effects:

1. wide application range, good precipitation effect, good effluent quality and low treatment cost.

The water treatment agent is suitable for slime water, oily sewage, printing and dyeing wastewater, papermaking wastewater, chemical industry, urban sewage and the like. After the agent is added into sewage, suspended matters are immediately flocculated, generated alumen ustum is large, precipitation is rapid, efficiency is high, floc strength is high, hydrophobicity is good, and filter pressing is facilitated. The filter cake after filter pressing has low water content and good quality. The cost of the agent for treating each cubic of sewage is only about sixty percent of the cost of other agents.

2. Has no corrosiveness.

The pH value of the solution treated by the agent is approximately neutral at 6.5-8.5, and the solution does not contain cl⁺When the treated water is recycled, the steel structure in a water system can be effectively protected from corrosion, so that a large amount of equipment maintenance cost can be reduced every year.

3. Has no toxicity

The sewage treatment agent has high purity, no impurity and no dust. The aqueous solution was clear and transparent. The agent has no toxicity, no influence on operators, no secondary pollution after treatment and other problems.

Detailed Description

To further illustrate the present invention, the following examples are given:

the sewage treatment agent is prepared by adding 40g (purity is more than 95%) of ferric sulfate (purity is more than 95%) 10g, 40g of magnesium sulfate (purity is more than 95%), 6g of manganese sulfate (purity is more than 95%), more than 90% of lithopone (purity is more than 4 g) into 1 liter of water, and adopting a steel body and a glass fiber reinforced plastic anti-corrosion dispensing tank, wherein the diameter R of the dispensing tank is 1.6m, the height h is 1.8m, and the volume V is 3.6m³The concentration of the prepared medicament is 2.8 percent.

Example 1 a treatment experiment was conducted on a mineral coal slurry, which is the middle water in a R24m rake thickener of a coal preparation plant, using the above sewage treatment agent. The coal slime water is pumped into an R8m concentrator, the sewage treatment agent is added into a pumped pipeline, and the coal slime water after being added with the chemicals is precipitated in an R8m concentrating pool. And after precipitation, the supernatant overflows to a clean water tank and is reused for coal washing. And pumping the flocculate after precipitation to a belt filter press by using a diaphragm pump for dewatering. A4P water pump is adopted for pumping coal slime water in a test, and the flow rate is 70m³The flow rate is controlled by adding the treating agent of the invention

Test run at a time

When the time is small, the water quantity of the treated coal slime water is 690m³200kg of the treating agent is used, namely 0.013kg of the treating agent is used for each cubic meter of the coal slime water. The experiment shows that the flocculation effect is good, and the supernatant is clear and can be reused for coal washing. The flocculating constituent is bigger and stronger. Filter pressing with a belt filter press to obtain a filter cake

Thick and low water content. The operation was continued for 20 days, and the test results are shown in the following table:

item	PH	SS(mg/l)	COD(mg/l)
				Coal slime water raw water sample	8.0	115000	16814
Clear water after treatment	7.2	93	87

Example 2, the treatment results of wastewater from a certain oil production plant treated by the present invention are shown in the following table:

item	PH	SS(mg/L)	COD(mg/L)	Oil (mg/L)
					Raw water sample for oil field	7.5	144.2	890	334
Clear water sample after coagulation and sedimentation	7.2	58	64	4.89.

Claims

1. A stain remover is characterized in that the treating agent contains Al⁺⁺⁺、Fe⁺⁺⁺And Mg⁺⁺And a small amount of Mn²⁺And lithopone, the content of Al⁺⁺⁺Account for

Fe⁺⁺⁺Account for

Mg⁺⁺Account for

Mixing with water, adding appropriate amount of aluminum sulfate (more than 95% purity), ferric sulfate (more than 95% purity), magnesium sulfate (more than 95% purity), manganese sulfate (more than 95% purity) and lithopone, and stirring at room temperature to obtain the final productAll dissolved.

2. The soil release agent of claim 1, wherein said Al is⁺⁺⁺、Fe⁺⁺⁺、Mg⁺⁺The optimal proportion of the components is as follows: al (Al)⁺⁺⁺40% of Fe⁺⁺⁺10% of Mg⁺⁺40% of Mn²⁺6 percent of lithopone and 4 percent of lithopone.