RU2618063C1 - Horizontal sediment tank with sediment vacuum dewatering - Google Patents

Abstract

FIELD: metallurgy.

SUBSTANCE: sediment tank with sediment vacuum dewatering comprisses a housing (1), device for supplying source water (2) and removal of clarified water (3), a drainage device (5), a vacuum tank (6) connected with drainage device (5) and equipped with an upper nozzle (9) for connection with a vacuum extractor (7) from gate (10), a lower pipe for discharging water (11) from gate (12) and sensor of upper water level (13) which is connected by electroautomatic means with vacuum extractor (7). The sediment tank is equipped with a vertical pipe (15), which is installed in the housing near drainaige device (5) and which at the bottom is equipped with a mesh filter (16) and water level sensor (17), connected by the electroautomatic means by with vacuum extractor (7).

EFFECT: shortened sediment dewatering process in a horizontal sediment tank, process automation and higher efficiency.

1 dwg, 1 ex

Description

The invention relates to the field of wastewater treatment and can be used for wastewater treatment with sludge dewatering in the metallurgical, mining and other industries.

The closest set of features to the claimed object is the selected as a prototype sedimentation tank with vacuum sludge dewatering, containing a housing, devices for supplying source water and drainage of clarified water, a drainage device, a vacuum tank connected to a drainage device and equipped with an upper pipe for connection with the device to create a vacuum with a shutter, a lower pipe for draining water with a shutter and a sensor for the upper water level, which is connected by an electroautomatics with a device for creating Nia vacuum. The use of a vacuum tank, a device for creating a vacuum in it and a sensor of the upper level of water in it allows, by creating a vacuum, to provide an increase in the pressure difference for water drainage from the housing, as well as to automatically turn off the device to create a vacuum when filling the vacuum tank, to prevent its overflow and the ingress of water into this device (patent RU No. 96861 U, IPC C02F 11/14, publ. 08/20/10, bull. No. 23).

The claimed object and prototype coincide with such essential features. Both devices can be used to clarify wastewater and contain a housing, devices for supplying source water and drainage of clarified water, a drainage device, a vacuum tank connected to a drainage device and equipped with an upper nozzle for connecting to a device for creating a vacuum with a shutter, a lower nozzle for water outlet with a shutter and a top water level sensor, which is connected by an electroautomatics device to create a vacuum. All these elements are also inherent in the horizontal sump, which is a rectangular reservoir elongated in the direction of water movement, in which the clarified water moves along the sump.

Analysis of the technical properties of the prototype, due to its features, shows that the receipt of the expected technical result when using the prototype is impeded by such reasons. The prototype does not provide the ability to control the water level in the housing and the ability to timely shut off the device to create a vacuum in a vacuum tank to prevent air from sucking through the drainage device, which indicates an insufficiently high degree of automation and determines the insufficiently high efficiency of the sludge dewatering process in the sump.

The claimed object is based on the task of creating a horizontal sedimentation tank with vacuum sludge dewatering, in which improvements by introducing new elements will make it possible to achieve a technical result when using the inventive object, which will increase the degree of automation and increase the efficiency of the sludge dewatering process in the horizontal sump.

The problem is solved due to the fact that a horizontal sump with vacuum sludge dewatering, containing a housing, devices for supplying source water and drainage of clarified water, a drainage device, a vacuum tank connected to a drainage device and equipped with an upper pipe for connecting to a device for creating vacuum with a shutter, a lower pipe for draining water with a shutter and a sensor for the upper level of water, which is connected automatically with a device for creating a vacuum, according to the claimed technical To this solution, the sump is equipped with a vertical pipe, which is installed in the housing near the drainage device and which at the bottom is equipped with a strainer and a water level sensor, connected by an automatic device to the device for creating a vacuum.

In some cases, the use of the claimed object may be characterized by the fact that

- the upper water level sensor in the vacuum tank is connected automatically with the shutter on the lower nozzle of the vacuum tank;

- the vacuum tank is equipped with a lower water level sensor, connected by an automatic device with a shutter on the lower nozzle of the vacuum tank and with a device for creating a vacuum;

- the vacuum tank is installed outside the housing of the sump and is connected to a drainage device, for example, using a pipeline;

- the clarified water drainage device consists of a clarified water drainage device in the clarification mode and a device for draining the clarified water above the sludge layer after completion of the clarification regime before starting the dehydration mode;

- a drainage device is located in the lower part of the horizontal sump, from the location of the device for supplying source water.

When using the proposed facility, the achievement of a technical result is achieved, which consists in increasing the efficiency of the sludge dewatering process in a horizontal sump by increasing the degree of automation.

Between the set of essential features of the claimed object and the achieved technical result there is such a causal relationship.

Equipping the horizontal sump with a water level sensor, which is connected automatically with the device for creating a vacuum, automatically controls the water level of the horizontal sump in the vacuum tank for the tank emptying mode while reducing the duration of the sludge dewatering process as a whole.

The connection of the upper water level sensor in the vacuum tank with automatic devices to create a vacuum and with a shutter on the lower nozzle of the vacuum tank allows you to automatically simultaneously disengage the device to create a vacuum and stop emptying the vacuum tank by sending commands to open the shutter on the lower nozzle of the vacuum tank. All this allows us to provide automation and increase the efficiency of the dehydration process, reduce the time it takes to switch the vacuum tank from the water intake to the empty mode while reducing the duration of the sludge dewatering process as a whole.

The additional equipment of the vacuum tank with a low water level sensor connected by an electro-automatics with a shutter on the lower nozzle of the vacuum tank and with a device for creating a vacuum allows, after reducing the water level in the vacuum tank to a predetermined lower mark (or when the vacuum tank is completely empty) in automatic mode simultaneously with stop emptying the vacuum tank by sending a command to close the shutter on the lower nozzle of the vacuum tank to start taking water into the vacuum tank by sending Mandates to turn on the device to create a vacuum. All this allows us to provide automation and increase the efficiency of the dehydration process, reduce the time it takes to switch the vacuum tank from the emptying mode to the water intake mode while reducing the duration of the sludge dewatering process as a whole.

Equipping a horizontal sump with a water level sensor, which is connected automatically with a device for creating a vacuum, allows automatic control of the water level in close proximity to the drainage device, and when the water level drops to a predetermined level by sending a command to turn off the device to create a vacuum, stop the process of taking water into a vacuum tank and stop the process of sludge dewatering, for example, to prevent air from sucking through the drainage device omty. The location of the water level sensor in the pipe, which is installed in the sump tank near the drainage device, helps prevent its damage by suspended solids and provides the most reliable control of the water level in the sump tank. The equipment of the lower part of the pipe with a strainer allows you to prevent sediment suspended solids from entering it with water and damage to the water level sensor located in it. All this allows for automation, as well as to reduce the duration and increase the efficiency of the sludge dewatering process as a whole.

The essence of the claimed object is illustrated by the drawing, which shows a longitudinal section of the claimed object.

In the drawing, the following notation is used:

1 - case

2 - device for supplying source water

3 - device for drainage of clarified water

4 - device for draining water

5 - drainage device

6 - vacuum tank

7 - device for creating a vacuum

8 - pipeline

9 - the upper pipe of the vacuum tank

10 - shutter

11 - lower pipe of the vacuum tank

12 - shutter

13 - upper water level sensor

14 - low water level sensor

15 - vertical pipe

16 - strainer

17 - water level sensor

18 - shutter

In a specific embodiment, the horizontal sump with vacuum sludge dewatering comprises a housing 1, a device for supplying source water 2, for example, made in the form of a water supply pipe, a device for draining clarified water 3, for example, made in the form of a drainage channel and a drain pipe, device 4 for discharge of water located above the sediment layer before discharge, for example, made in the form of a drain pipe, and a drainage device 5 located in the lower part of the housing 1 from the location of the device for input water 2 and made, for example, in the form of a strainer.

To ensure vacuum dewatering of sludge in the housing 1, the claimed object is additionally equipped with a vacuum tank 6 and a device 7 for creating a vacuum in the vacuum tank 6, located outside the housing 1. In this case, the vacuum tank 6 is connected to the drainage device 5 using the pipe 8, and is also equipped the upper nozzle 9 for connection to a device 7 for creating a vacuum with a shutter 10, the lower nozzle 11 for draining water with a shutter 12 and a sensor 13 for the upper water level, which is connected by an automatic device to the device 7 for Denmark vacuum.

In addition, the sensor 13 of the upper water level is additionally connected by an automatic device with a shutter 12 on the lower pipe 11 of the vacuum tank 6. The vacuum tank 6 is further equipped with a sensor 14 of the lower water level connected by an automatic device with a shutter 12 on the lower pipe 11 of the vacuum tank 6 and with a device 7 for creating a vacuum. The inventive sump is additionally equipped with a vertical pipe 15, which is installed in the housing 1 near the drainage device 5 and which in the lower part is equipped with a strainer 16 and a water level sensor 17, which is connected by an automatic device to the device 7 for creating a vacuum. In this case, the vertical pipe 15 is installed so that its lower part is at a predetermined distance from the bottom of the housing 1, and its upper part protrudes above the side of the housing 1 of the sump, and the device 4 for discharging water located above the sediment layer is equipped with a shutter 18 before unloading the sediment In some cases, the lower part of the pipe 15 can be located directly on the bottom of the housing 1 while ensuring the supply of water through the strainer 16, the upper part of the pipe 15 can be placed above a predetermined upper water level in the housing 1 (not shown).

In a specific embodiment, the inventive horizontal sump with vacuum sludge dewatering works as follows. Water containing suspended solids, through a device for supplying source water 2, enters the housing 1. In housing 1, suspended solids fall out of the water stream and settle to the bottom of the housing 1. The clarified water is discharged from the housing 3 to the clarified water 3 from the housing 1 by destination. When the housing 1 is filled with sediment to a predetermined level (not higher than the placement level of the device 4 for draining water), the supply of source water through the device 2 to the housing 1 is stopped, the shutter 18 is opened and through the drain device 4 the water above the sediment layer is discharged from the housing 1 and sent as directed. After completion of the drain, the shutter 18 closes. After that, the device 7 for creating a vacuum is turned on, and water through the drainage device 5 through a pipe 8 enters the vacuum tank 6. The shutter 10 on the upper pipe 9 is in this position in the open position. The water is drained from the housing 1 and, consequently, the sludge is dehydrated due to the pressure created by a column of water located in the housing 1, for example, 3 m.a., and due to the vacuum created in the vacuum tank 6 by the device 7, for example, 9 m century When creating a vacuum tank 6 gradually begins to fill with water. Upon reaching a predetermined upper level of water in the tank 6, the sensor 13, using electroautomatics, instructs to turn off the device 7 to create a vacuum and open the shutter 12. As a result, the water drain from the housing 1 and the filling of the tank 6 stops and its emptying through the lower pipe 11 begins. Then, when reaching a predetermined lower water level in the tank 6, the sensor 14 by means of electroautomatics gives a command to close the shutter 12 and turn on the device 7 to create a vacuum. As a result, the water again begins to drain through the pipeline 8 from the housing 1 and the tank 6 is filled. Next, the sludge dewatering process is repeated until the water level in the housing 1 of the sump reaches a predetermined lower level. Upon reaching a predetermined lower water level in the housing 1, the sensor 17 located in the lower part of the vertical pipe 15, which is installed in the housing 1 near the drainage device 5, instructs to turn off the device 7 to create a vacuum, after which the water is removed from the housing 1 and filling tank 6 stops, and the discharge of dehydrated sludge from the housing 1 begins with a grab crane (not shown).

In addition, sludge dewatering in the inventive sump can be carried out in a semi-automatic mode. In this case, after the automatic shutdown of the device 7 for creating a vacuum (at the command of the sensor 13), the shutter 12 is opened by the operator. When the shutter 12 is open, the vacuum tank 6 is emptied completely or to a predetermined lower water level, after which the shutter 12 is closed by the operator and the device is turned on 7 to create a vacuum. The process is then repeated. The completion of the process of sludge dewatering in the housing 1 is carried out by the operator during a visual inspection of the sludge in the housing 1 or at the beginning of the suction of air through the drainage device 5 into a vacuum tank 6 (not shown).

In a specific example, the use of the inventive horizontal sump with vacuum sludge dewatering allows water to be drained from the housing 1 through the drainage device 5 under a total pressure of, for example, 12 m century, i.e. which is about 4 times larger than without using a vacuum process. All this makes it possible to ensure automation of the dehydration process, reduce the time for switching the operating modes of the vacuum tank, and also to reduce the duration and increase the efficiency of the sludge dewatering process as a whole.

Claims (1)

A horizontal sedimentation tank with vacuum sludge dewatering, comprising a housing, devices for supplying source water and draining clarified water, a drainage device, a vacuum tank connected to a drainage device and equipped with an upper nozzle for connecting to a device for creating a vacuum with a shutter, a lower nozzle for draining water with a shutter and a top water level sensor, which is connected automatically with the device for creating a vacuum, characterized in that the sump is equipped with a vertical pipe, which is installed it is enclosed in a housing near the drainage device and which at the bottom is equipped with a strainer and a water level sensor connected by electroautomatics to a device for creating a vacuum.

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