CN103288244A - High-hardness water purification treatment recycling process - Google Patents

Abstract

The invention discloses a high-hardness water purification treatment recycling process which comprises the following steps of: (1) flowing high-hardness water into a recycling water tank, then pumping into an adsorption neutralization reaction device through a lifting pump and adding lime and a flocculating agent to remove impurities through reaction, regulating a pH value to 8-14, and then flowing into a digestion tank for further reaction and digestion; (2) pumping water subjected to digestion reaction into a filter for filtering and clarification, and then delivering into a middle water tank; (3) delivering the water inside the middle water tank from a clean water pump into a desalting reactor to be reacted with Na2CO3 to generate carbonate deposits so as to reduce water hardness; and (4) pumping reacted water into the filter for filtering and clarification, then delivering into the clean water pump, adding a small amount of sulfuric acid to regulate the pH value to 6-9, delivering into a fresh water tank, and delivering through a fresh water pump to a user for recycling. The high-hardness water purification treatment recycling process disclosed by the invention can achieve the sewage recycling rate of more than 80%.

Description

A kind of high hardness water purifying treatment reuse technology

Technical field

The present invention relates to sewage disposal, be specifically related to the neutral water handling reclamation of the high saliferous of qualified discharge after trade effluent, the sanitary sewage disposal.

Background technology

China belongs to the country of shortage of water resources, along with the outbreak at full speed in each field such as industry, agricultural, the demand of water resources is also sharply increased, thereby causes rivers cutout, minable groundwater resource fewer and feweri, and industry, agricultural water cost are more and more higher.Along with water resources shortage, the supply of water has become the enterprise expanding restraining factors.

Industrial Wastewater Treatment is for guaranteeing to reach emission standard, often add processing medicaments such as superfluous lime, cause and handle back saliferous height, hardness height, be directly used in the agricultural irrigation meeting and cause salting of soil, be used for industry and can cause its uses of negative impact such as fouling, obstruction, often directly discharging.In the prior art, middle water recycling method is that not only the capital construction cost is bigger for this technology by biological treatment+precipitation+filtration, and treatment effect is not fine, the reuse scope of water in the influence, the operability of this technology is also poor simultaneously, needs the effect of control biological treatment.

Summary of the invention

The purpose of patent of the present invention is to overcome the deficiency of above-mentioned technology, and a kind of high hardness water purifying treatment reuse technology is provided, and handles water and carries out reuse, substitutes primitive water.

Technical scheme of the present invention is: a kind of technical process of high hardness water purifying treatment reuse technology is as follows:

(1) allows high hardness water flow into reuse pool, pump into the absorption neutralization reactor by lift pump then and add lime and flocculation agent carries out impurity removal reaction, and its pH value is adjusted to 8 ~ 14, allow its inflow digestive shelf further react, digest then;

(2) water pump through digestion reaction send strainer to filter, clarify, and enters intermediate pool then;

(3) water of intermediate pool is sent into except salt reactor and Na by fresh water pump ₂CO ₃React, generate carbonate deposition and reduce the water hardness;

(4) reacted water pumps into strainer filtration, clarification, enters clean water basin then, adds a small amount of sulfuric acid PH is adjusted to 6 ~ 9, enters fresh-water tank, sends into user's reuse by fresh water pump.

Described Na ₂CO ₃Addition be theoretical consumption 80 ~ 150%.

Beneficial effect of the present invention has following aspect:

(1) adopt powerful purification techniques, this is the first step of handling the key of reuse.Organic object height in the water inlet, and many colloidalmaterials are arranged, must remove, the specific equipment of removal is the absorption neutralization reactor, it is that the collection medicament fully mixes with the high speed of water; Suitable flco growth environment; Three functions of solid-liquid high efficiency separation are one, utilize column plate to produce " eddy current " microkinetic by current, and the utmost point is beneficial to flco absorption impurity, add low common flocculation agent and the lime of a small amount of value and carry out sewage disposal, can reach the deep purifying effect.

(2) adopt the deep desalting technology.Utilize CaCO ₃, MgCO ₃Solubleness hangs down water Ca ²⁺, Mg ²⁺Particle.Ratio of desalinization can reach 80 ~ 90%, and more valuable is water rate of recovery height, and it is 60 ~ 70% that general film reclaims the sewage disposal rate of recovery, and the solution of the present invention sewage recycle-water rate can reach more than 80%.

Embodiment

Embodiment

According to the present invention, the newly-built pilot plant of Wengfu Group Co., Ltd. passes through pilot plant test.The calcium sulfate salt of handling in the water is saturated and hypersaturated state, and hardness reaches 1500-3000mg/l, and specific conductivity reaches 2000-3500 μ s/cm.Obtained good effect.

(1) technical process: (allow high hardness water flow into reuse pool, pump into the absorption neutralization reactor by lift pump then and add lime and flocculation agent carries out impurity removal reaction, and its pH value is adjusted to 8 ~ 14, allow its inflow digestive shelf further react, digest then;

(2) water pump through digestion reaction send strainer to filter, clarify, and enters intermediate pool then;

(3) water of intermediate pool is sent into except salt reactor and Na by fresh water pump ₂CO ₃React, generate carbonate deposition and reduce the water hardness; Na ₂CO ₃Addition be theoretical consumption 80 ~ 150%;

(4) reacted water pumps into strainer filtration, clarification, enters clean water basin then, adds a small amount of sulfuric acid PH is adjusted to 6 ~ 9, enters fresh-water tank, sends into user's reuse by fresh water pump.

The high hardness water water-quality guideline:

It is as follows to handle back water quality situation:

By above data presentation, the intermediate pool ratio of desalinization is about 50%.The fresh-water pool ratio of desalinization surpasses 85%(hardness on average at 292mg/L) be better than a local water (this factory get near in the river for the production of with the water of life) water quality (hardness is 300 ~ 350mg/L), the reuse of this kind water is finished and can be replaced water of productive use, reduces the primitive water water withdrawal.

Claims (2)

1. high hardness water purifying treatment reuse technology is characterized in that its technical process is as follows:

(1) allows high hardness water flow into reuse pool, pump into the absorption neutralization reactor by lift pump then and add lime and flocculation agent carries out impurity removal reaction, and its pH value is adjusted to 8 ~ 14, allow its inflow digestive shelf further react, digest then;

(2) water pump through digestion reaction send strainer to filter, clarify, and enters intermediate pool then;

(3) water of intermediate pool is sent into except salt reactor and Na by fresh water pump ₂CO ₃React, generate carbonate deposition and reduce the water hardness;

(4) reacted water pumps into strainer filtration, clarification, enters clean water basin then, adds a small amount of sulfuric acid PH is adjusted to 6 ~ 9, enters fresh-water tank, sends into user's reuse by fresh water pump.

2. high hardness water purifying treatment reuse technology according to claim 1 is characterized in that described Na ₂CO ₃Addition be theoretical consumption 80 ~ 150%.