RU2845964C1 - Method of recycled water clarification in cold water supply deironing stations - Google Patents

Abstract

FIELD: water supply.

SUBSTANCE: proposed method consists in discharging recycled water after filter washing in deironing station with filtration hall. Recycled water is moved through a pipeline into a container for recycled water settling, plastered in a textured manner to retain iron hydroxide deposits, then, the recycled water is settled in a tank for settling recycled water, where it is brought to a clarified state. Then, the clarified water is pumped through the pipeline through a filter made of fabric material, installed in the tank for recycled water sediment, and through an ultra-high-speed pressure filter with a granular layer, installed in the pump station, into a clarified water sedimentation tank, plastered in a similar way, where it is brought to the finally clarified state. Then finally clarified water is disinfected by chlorination method for additional oxidation of divalent iron and supplied through coarse filter from fabric material, which is installed in the tank for clarified water sediment, to filtration hall of deironing station equipped with sand filters. Then, finally clarified water is moved through sand filters. After water clarification cycle performing movement of pure water by reverse flow through ultra-high pressure filter with granular layer and a coarse filter from fabric material into a tank for settling recycled water for subsequent washing, treatment of sludge deposits and their further pumping to sludge lagoons.

EFFECT: enabling treatment of flush water, reduced discharge of water with sediment into sludge lagoons, which reduces environmental pollution and improves quality of clarified drinking water for the public.

1 cl, 2 dwg

Description

Field of technology

The invention relates to methods of recycling water supply and can be used to reduce environmental pollution by wash water and to provide drinking water to the population.

State of the art

A method for recycling water supply of hydromechanization equipment using settling tanks constructed on the terrain is known from the prior art. The method includes the construction of a hydraulic dump, the reception and washing of hydraulic mixture, the formation of a settling tank, clarification, accumulation and storage of industrial water in it, discharge, collection and return of industrial water to the recycling water supply system using a pumping station in a settling tank. At the place of discharge of industrial waste, a screen is installed parallel to the surface of the hydraulic dump at a distance ensuring the optimal throughput of the settling tank and determined depending on the water inflow, flow rate and width of the settling tank. The pumping station is installed directly behind the contours of the screen. The screen is installed with an elevation above the water surface, by the value of the maximum wave run-up. The technical result is an increase in the efficiency of the settling tank due to the purification of process water, and a decrease in the range of transportation of pressure water (RU 2603789, C1, B01D 21/02, publication date 27.11.2016).

The disadvantage of this method is the scope of application, since this invention is applied exclusively to water supply of hydromechanization equipment for mining operations and does not have the ability to provide drinking water to the population.

The closest analogue is the method of disinfecting circulating water in closed water supply systems, which consists of draining circulating water from aquaculture pools into the discharge pipeline, moving circulating water from the pools into a mechanical filter, moving circulating water from the mechanical filter into a biological filter, moving circulating water from the biological filter into a summing pool, in which the circulating water is mixed with make-up water. The replaced circulating water is discharged through an overflow pipeline. Then, water from the summing pool is fed to the oxygenator using a pump, and the water that has passed through the oxygenator is fed to the pool through the supply pipeline. From the summing pool, circulating water is additionally fed to a device for mixing the ozone-oxygen mixture with water, in which the circulating water is saturated with an ozone-oxygen mixture with an ozone content of 4 to 5 mg/l. After this, the circulating water saturated with the ozone-oxygen mixture is fed into the outlet pipeline through the circulating water discharge point located at the point of discharge of contaminated water from the first pool. The amount of water fed from the device for mixing the ozone-oxygen mixture with water to the discharge point is from 10 to 15% of the total volume of circulating water in the recirculating water supply system. This ensures an increase in the quality of circulating water disinfection in recirculating water supply systems, as well as a reduction in the duration of circulating water treatment. (RU 2819703, C1, Е03С 1/126, publication date 23.05.2024).

The disadvantage of the closest analogue is the lack of possibility of providing drinking water to the population, since this method is used exclusively for breeding aquatic animals.

The technical problem of the claimed invention is to overcome the technical shortcomings inherent in analogues, which leads to the need to create a method for clarifying circulating water in installations of cold water supply iron removal stations, with the possibility of reducing environmental pollution by reducing the discharge of water with sediment to sludge maps and providing drinking water to the population.

Disclosure of the essence of the invention

The technical result of the claimed invention is the processing of wash water, reducing the discharge of water with sediment into sludge maps, which will reduce environmental pollution and improve the quality of clarified drinking water for the population.

The technical result of the claimed invention is achieved due to the fact that the method for clarifying circulating water in the installations of cold water supply iron removal stations, including draining circulating water after washing the filters in the iron removal station with a filter hall, is characterized in that it includes moving circulating water through a pipeline into a tank for settling circulating water, plastered in a relief manner to retain iron hydroxide sediments, then the circulating water settles in a tank for settling circulating water, where it is brought to a clarified state, then the clarified water is pumped through a pipeline through a filter made of a special fabric material installed in the tank for settling circulating water and through an ultra-fast pressure filter with a granular layer installed in a pumping station, into a tank for settling clarified water, plastered in a similar manner, where it is brought to a finally clarified state, then the finally clarified water is disinfected by chlorination for additional oxidation of divalent iron and is fed through a coarse filter made of a special fabric material installed in a tank for settling clarified water, into the filtration hall of the iron removal station, equipped with sand filters, then the finally clarified water is moved through sand filters for the purpose of final purification and further supply of drinking water to the population, after the water clarification cycle, clean water is moved in a reverse flow through a high-speed pressure filter with a granular layer and a coarse filter made of a special fabric material into a tank for settling circulating water for subsequent washing, treatment of sludge deposits and their further pumping to sludge pads.

Brief description of the drawings

The claimed invention is illustrated by drawings, which depict the following:

Fig. 1 - functional diagram of the method, top view;

Fig. 2 - functional diagram of the method, side view in section;

The following elements are designated by positions on the drawings:

1 - pipeline for moving circulating water;

2 - tank for settling circulating water;

3 - coarse filter made of special fabric material;

4 - flow of clarified water;

5 - pumping station;

6 - ultra-fast pressure filter;

7 - tank for settling clarified water;

8 - iron removal station with a filter room;

9 - pipeline with reverse flow of clean water;

10 - water with sediment;

11 - silt maps;

12 - pipeline for finally clarified water.

Implementation of the invention

The method of clarifying circulating water in cold water supply iron removal stations is used to reduce environmental pollution by wash water and to provide drinking water to the population.

According to the invention, the method for clarifying circulating water in cold water supply iron removal station installations operates as follows:

The pipeline moves the circulating water 1 to the circulating water settling tank 2, where the circulating water undergoes a settling process for five hours, which allows the circulating water to be brought to the state of clarified water. Then, through the pipeline through a coarse filter made of special fabric material 3, the flow of clarified water 4 through the pumping station 5, which includes an ultra-fast pressure filter 6, with the help of which additional purification of the clarified water is carried out, the clarified water is pumped into the clarified water settling tank 7, where the clarified water settles for nineteen hours, which allows for an additional reduction in impurities of various sediments. Additionally, to retain iron hydroxide sediments and other impurities contained in the circulating and clarified water, the tanks for circulating and clarified water are plastered in a relief manner. After the clarified water has settled in a suitable container, chlorine is added to disinfect the water and oxidize the divalent iron, then through a filter made of a special fabric material, the finally clarified water is pumped through pipeline 12 to the iron removal station with filter room 8, where the clarified water is brought to a drinking state and then supplied to end consumers, while due to the process of settling the water and the use of various filters, the use of chemicals for sedimentation and clarification of water is eliminated, which ultimately improves the quality of drinking water for the end consumer.

After the pumping of the emptying tanks for recycled and clarified water is completed, the filters made of special fabric material installed in them in the sediment compaction zone and the ultra-fast pressure filter installed in the pumping station are washed through the pipeline with a flow of return clean water 9, which allows to significantly reduce the discharge of water with sediment 10 to sludge maps 11 after each cycle of washing the filters and tanks, and as a result to reduce the negative impact on the environment.

Claims (1)

A method for clarifying circulating water in cold water supply iron removal station installations, comprising draining circulating water after washing filters in an iron removal station with a filter room, characterized in that it comprises moving circulating water through a pipeline into a circulating water settling tank plastered in a relief manner to retain iron hydroxide sediments, then settling of the circulating water occurs in a circulating water settling tank, where it is brought to a clarified state, then pumping of the clarified water through a pipeline through a fabric filter installed in a circulating water settling tank and through a high-speed pressure filter with a granular layer installed in a pumping station, into a clarified water settling tank plastered in a similar manner, where it is brought to a finally clarified state, then the finally clarified water is disinfected by chlorination for additional oxidation of divalent iron and fed through a coarse fabric filter material installed in a tank for settling clarified water, into the filtration hall of the iron removal station, equipped with sand filters, then the finally clarified water is moved through the sand filters, after the water clarification cycle, clean water is moved in a reverse flow through a high-speed pressure filter with a granular layer and a coarse filter made of fabric material into a tank for settling circulating water for subsequent washing, processing of sludge deposits and their further pumping to sludge pads.