RU151047U1 - HORIZONTAL RESTAURANT - Google Patents

Abstract

A horizontal settling tank including a housing, devices for introducing purified water and outputting purified water and solid phase, an integrated flocculation chamber, thin-layer modules, characterized in that a distribution grid is installed in the integrated flocculation chamber, and the clarified water collection system is made dispersed in the form of gutters with holes along the sump and a pocket for collecting clarified water.

Description

The utility model relates to treatment facilities and serves to prepare and clarify drinking or industrial water by sedimentation of suspended solids.

Currently, a number of sedimentation tanks are known, such as horizontal, vertical, thin-layer, with built-in flocculation chambers, with built-in filtering devices and with additional equipment inside the structure. Basically, the horizontal sump is a rectangular tank with a length of about 70 m, a width of 3 to 8 m and a height, usually not less than 5 m, if we talk about large production treatment plants. There are also bottoms with a slope in the pit for discharge of sediment and inlet and outlet pipelines or trays.

A horizontal sedimentation tank is known that contains a settling tank, a water supply distribution system with filling openings and a dispersed clarified water discharge system with drainage holes located at different heights (patent application RU 96108844 A, B01D 21/24, published on 08.27.1998).

Known thin-layer sump containing a housing, a device for inputting purified water and the output of purified water and solid phase, a thin-layer module comprising inclined separation plates placed in a removable frame, the housing is made in the form of a cylinder with an inclined bottom and is equipped with a sediment distributor, the frame of the thin-layer module is made in the form of an inclined cylinder, the separation plates of the thin-layer module are made profile (patent RU 2104079 C1, B01D 21/02, published 02/10/1998).

The closest technical solution is a horizontal settler with an integrated flocculation chamber, which includes a housing, devices for introducing purified water and withdrawing purified water and solid phase, a pocket for collecting clarified water, while thin-layer modules are mounted in the settling tank and in the flocculation chamber (see MDM 40-3.2000 Guidelines to ensure compliance with sanitary rules and norms SanPiN 2.1.4.559-96 "Drinking water. Hygienic requirements for water quality of centralized drinking systems th water. Quality assurance ", approved by Resolution of the State Construction Committee of Russia from 31.03.2000 №24, head of 3.2-3.3 in Fig. 5, D1). Full name: “Thin-layer horizontal sedimentation tank with a thin-layer ejection flocculation chamber”

The disadvantage of this structure is the lack of a uniform process of coagulation of suspended solids and the repayment of the incoming flow rate. The collection of purified water from this sump is carried out in a standard way directly into the pocket for collecting clarified water, which makes it impossible to reduce the length of the sump.

The objective of the utility model is to reduce the area of the sump, while maintaining the same plant capacity, increase the efficiency of the coagulation process and, therefore, the cleaning efficiency.

The essence of the utility model lies in the fact that the horizontal sump, which includes a housing, devices for introducing purified water and withdrawing purified water and solid phase, an integrated flocculation chamber, thin-layer modules, while a distribution grid is installed in the built-in flocculation chamber, and the collection system is clarified water made dispersed, in the form of gutters with holes located along the sump, and a pocket for collecting clarified water.

The technical result is that the built-in flocculation chamber with a distribution grid contributes to a uniform process of coagulation of suspended solids and the repayment of the incoming flow rate. The treated water, passing through a thin-layer module, goes into the laminar mode of movement (V _flow ≈1.5-2.0 mm / s), due to this, the resulting suspension begins to slide along the module plate, and partially clarified water passes to the construction of the sump through a common wall for secondary sedimentation. Sliding flakes form a layer of suspended sediment under the thin-layer module, because their sliding speed is less than the speed of the incoming stream of the source water. In this layer of suspended sediment, an additional enlargement of the flakes and an improvement in their formation occur, which are transported further to the settler and quickly precipitated due to their hydraulic coarseness. Due to the fact that large flakes require a shorter settling time, as well as due to the dispersed collection system of clarified water, the length of the proposed settler decreases by one third of the length of standard horizontal settlers. The clarified water with the concentration of suspended solids With a _blast = 3.0-4.0 mg / l goes further to the filtering facilities. Such an insignificant amount of suspended solids reduces the load on the filters and thereby increases their filter cycle and saves water consumption for flushing these structures.

The essence of the utility model is illustrated by drawings, where

FIG. 1 is a side view in section;

FIG. 2 is a plan view.

The horizontal sump includes a rectangular housing 1 with a pit in the bottom for collecting sludge, a device for supplying purified water - a supply pipe 2 mounted in a conical compartment of the flocculation chamber 3, a distribution grid 4 located in the lower part of the flocculation chamber 3, blocks of thin-layer modules 5 located in the upper part of the flocculation chamber 3 and settler 1, a device for collecting purified water and solid phase - a dispersed system for draining clarified water, consisting of gutters for I collect clarified water 6 and a pocket for collecting clarified water 7, a discharge pipe for clarified water 8 and a discharge pipe for the release of sediment 9.

Horizontal sump works as follows. Source water with the addition of coagulant enters the flocculation chamber 3 through the inlet pipe 2. Overcoming the distribution grid 4 and moving up to the block of thin-layer modules 5, flakes begin to form in the treated water, which are then deposited on the plates of the modules and slide away, forming a layer of suspended sediment. Next, clarified water with large flakes passes into the body of the settler 1, where suspension of sediment is also effective in the plates of the mounted block of thin-layer modules 5. Purified water, rising upward from the bottom of the settler, is collected in the channels for collecting clarified water 6 and gets into a pocket for collection of clarified water 7. Next, the treated water through the discharge pipe of clarified water 8 enters the filtering structure for the next stage of purification. The sludge accumulated in the pit of the bottom of the sump is removed through a discharge pipe to discharge sludge 9 into special sludge collection tanks provided for in sewage treatment plants.

A comparative analysis of the claimed utility model and the closest analogue was carried out. During the tests, a significant enlargement of suspended matter flakes was noted, due to which the sizes of the proposed sump decreased. In this case, the cleaning efficiency increased several times, reducing the concentration of suspended solids at the outlet of the sump to 3.0-4.0 mg / L. Data indicating the dependence of the enlargement of flakes and the degree of clarification of water from the presence of additional built-in structures are given in the table.

Claims (1)

A horizontal settling tank including a housing, devices for introducing purified water and outputting purified water and solid phase, an integrated flocculation chamber, thin-layer modules, characterized in that a distribution grid is installed in the integrated flocculation chamber, and the clarified water collection system is made dispersed in the form of gutters with holes along the sump and a pocket for collecting clarified water.

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