RU217937U1 - CYCLONE-ELECTRIC FILTER - Google Patents

Abstract

The utility model is designed to clean gases from dust in the field of action of centrifugal forces and electrical interaction forces, and can be used in the chemical, petrochemical, metallurgical, fuel and energy and other industries. The cyclone electrostatic precipitator comprises a vertical cylindrical-conical body equipped with a branch pipe for removing dust, branch pipes for supplying a dusty gas flow located tangentially to the body, an exhaust pipe, current-carrying plates installed inside the branch pipes for supplying a dusty gas flow with the possibility of being connected by conductors to a current source. The current-carrying plates are arranged in a labyrinthine manner, forming labyrinthine corridors. EFFECT: increased environmental efficiency of the cyclone-electric precipitator by reducing emissions of fine dispersed fraction. 1 ill.

Description

The utility model is designed to clean gases from dust in the field of action of centrifugal forces and electrical interaction forces, and can be used in the chemical, petrochemical, metallurgical, fuel and energy and other industries.

A device for gas purification is known (Patent No. 169232, IPC B01D 45/02. Device for gas purification / Moiseev V.A., Andrienko V.G., Lipetsky V.G., Donchenko V.A., Mitrofanov N.I. , Chentsov A.V., (RF), application 2016135241, filed on August 30, 2016, published on March 13, 2017, Bull. No. 8).

The device for gas purification contains a hollow body, preferably of a cylindrical shape, to the upper part of which an underwater gas duct is attached, made in the form of a pipe for supplying gas to be cleaned, and an outlet gas duct, made in the form of a pipe and designed to drain gas purified from mechanical impurities . The flue is equipped with a branch pipe. A bunker is attached to the lower end of the housing, designed for the deposition of mechanical impurities separated from the gas.

The gas ducts are made in the form of a single unit according to the "pipe in pipe" principle, that is, the pipe is located in the pipe cavity coaxially with it. When mounted on the hull, the gas ducts are positioned coaxially with the fairing. The lower part of the flue has a conical socket, which forms an outlet nozzle with a cone-shaped surface of the fairing. The outlet flue has an inlet nozzle.

In the housing cavity, the conical surface of the fairing, as well as the side and upper walls of the housing, form a dust settling chamber communicated with nozzles located in its upper part. To enable sedimentation of suspended particles of dusty air into the hopper, the fairing has holes along the periphery that communicate the dust settling chamber with the hopper equipped with an outlet pipe.

The fairing is mounted in the housing with the possibility of axial adjusting movement to adjust the size of the outlet nozzle. To do this, the fairing in the lower part has a shank mounted with a gap in the guides (positions not indicated) of the body. The adjusting movement mechanism of the fairing is made in the form of a shaft mounted in the housing sleeve with the possibility of rotation. At one end of the shaft, there is a place on a turnkey basis or under the handle for rotating the shaft, and at its other end, a gear is fixed, which is in constant contact with the gear thread made on the fairing shank.

Device for cleaning gases works as follows.

We will consider the operation of the device using the example of its use for cleaning methane-containing gas emissions from coal mines from mechanical impurities.

For operation, the device is built into the gas exhaust system of a coal mine. The injection and removal of gases is carried out at the expense of regular mine fan installations. When installing the device, the gas duct is connected to the contaminated gas supply line, and the gas duct branch pipe is connected to the purified gas outlet line.

Next, adjust the size of the outlet nozzle. This allows you to match the throughput of the device with the performance of the gas exhaust system. To adjust the size of the nozzle, the shaft is rotated, as a result of which the rotating gear, in contact with the gear cutting of the shank, moves the fairing in the vertical direction, adjusting the distance between the conical surface of the fairing and the flue socket (that is, the gap between them, which is the nozzle). The size of the nozzle is controlled in a known manner, for example by a template, through a window (not shown) of the body. The device is set up and ready to go.

During operation of the device, the dusty air flow, moving through the underwater gas duct, contacts with the cone-shaped surface of the fairing and enters the dust settling chamber through the outlet nozzle, in which suspended particles decelerate and fall out of the dusty flow due to gravitational forces.

Through the holes made in the fairing, suspended particles from the chamber enter the hopper, from where, as they accumulate, they are removed through the outlet pipe of the hopper. Purified from mechanical impurities, the gas flow from the chamber through the inlet nozzle enters the outlet gas duct and is discharged from the filter through the branch pipe.

The disadvantage of the known device for gas purification is the inability to clean fine mechanical impurities.

The closest in technical essence to the claimed solution is a cyclone electrostatic precipitator that allows you to remove a large, medium and fine dispersed phase of particles from the gas stream without interrupting the cleaning process (Patent No. 102202, IPC B04C 5/04. Cyclone electrostatic precipitator / Dolgov R.V. (RF) - No. 2010131742/05; Claimed on July 28, 2010, published on February 20, 2011, Bull. No. 5).

The cyclone electrostatic precipitator comprises a vertical cylindric housing equipped with a branch pipe for removing dust, branch pipes for supplying a dusty gas flow to the apparatus located tangentially to the body, a cover, an exhaust pipe, current-carrying plates installed inside the inlet pipes and connected by means of conductors to the contacts of the current source.

Cyclone electrostatic precipitator works as follows.

First, the conductive plates are connected to a current source using conductors and charged. The conductive plate acquires a negative charge, and the other plate becomes positive. Then the dust-gas flow is fed into the nozzles. The dust-gas flow, passing through the nozzles, collides with the conductive plates, as a result of which the dust particles acquire a positive or negative charge, respectively. Further, the dust and gas flows enter the cylindrical-conical body. In the cylindrical part of the housing, the gas flow, saturated with oppositely charged particles, is mixed. Under the action of electrical interaction forces, dust particles stick together, losing their electric charge and increasing their mass. The dusty gas flow passes in a circle around the exhaust pipe and moves downward spirally, ensuring the separation of large particles of the dispersed phase from the dispersion medium (gas). In the lower part of the body, the flow loses speed and changes its direction, as a result of which medium and small suspended particles are separated and removed through the nozzle. Purified from coarse, medium and fine dispersed dust, gases move in an ascending spiral and enter the exhaust pipe, from where they are removed from the cyclone.

The disadvantage of the known filter-electrocyclone is the low degree of electrification of the incoming dust and gas flow, due to the partial (tangential) contact of the dispersed phase with the conductive plates, as a result of which not all the fine dispersed fraction acquires positive and negative charges, thereby sticking together positively and negatively charged particles to a lesser extent. particles followed by precipitation.

The technical problem to be solved by the claimed utility model is to increase the environmental efficiency of the cyclone-electrostatic precipitator by reducing emissions of fine dispersed fraction.

To solve this problem in a known device containing a vertical cylindro-conical body equipped with a pipe for removing dust, pipes for supplying a dusty gas flow located tangentially to the body, an exhaust pipe, current-carrying plates installed inside the pipes for supplying a dusty gas flow with the possibility of connection by conductors with current source, are located labyrinthically, forming labyrinthine corridors.

The feature that distinguishes the claimed technical solution from the prototype, according to the utility model, is the labyrinthine arrangement of the current-carrying plates. Due to this distinctive feature, the incoming dust-gas flow, passing through the labyrinth-like corridor formed by the current-carrying plates, due to the periodic change in the motion vector, repeatedly collides with the current-carrying plates under the influence of inertial forces, thereby ensuring a more complete degree of acquisition of positive or negative charge by dust particles, respectively.

The proposed cyclone electrostatic precipitator is illustrated in the drawing.

The cyclone electrostatic precipitator contains a vertical cylindric housing 1, equipped with a pipe for removing dust 2, pipes for supplying a dusty gas flow 3, 4 located tangentially to the body, an exhaust pipe 5, labyrinth-shaped current-carrying plates 6, 7 installed inside the pipes for supplying a dusty gas flow and connected by means of conductors 8, 9 with the contacts of the current source 10.

The device works as follows.

First, the labyrinth-shaped current-carrying plates 6 and 7 are connected to the current source 10 using conductors 8, 9 and charged. The current-carrying plate 6 acquires a negative charge, and the current-carrying plate 7 acquires a positive charge. Then, a dusty gas flow is fed into the nozzles for supplying a dusty gas stream 3 and 4. Dust-gas flow, passing through pipes for supplying dusty gas flow 3, 4, repeatedly collides with current-carrying plates 6, 7, as a result of which dust particles acquire a positive or negative charge, respectively. Next, dust and gas flows enter the cylindrical-conical body 1. In the cylindrical part of the body 1, the gas flow, saturated with oppositely charged particles, is mixed. Under the action of electrical interaction forces, dust particles stick together, losing their electric charge and increasing their mass. The dusty gas flow passes in a circle around the exhaust pipe 5 and moves downward spirally, ensuring the separation of large particles of the dispersed phase from the dispersion medium (gas). In the lower part of the housing 1, the flow loses speed and changes its direction, as a result of which medium and small suspended particles are separated and removed through the dust removal pipe 2. The gases cleaned from large, medium and fine dispersed dust move in an ascending spiral and enter the exhaust pipe 5, from where they are removed from the cyclone.

The proposed cyclone electrostatic precipitator makes it possible to purify the dust and gas flow not only from the coarse and medium dispersed phases of dust, but also from fine particles, thereby increasing the degree of gas purification.

Claims (1)

Cyclone electrostatic precipitator, containing a vertical cylindric housing, equipped with a branch pipe for removing dust, branch pipes for supplying a dusty gas flow located tangentially to the body, an exhaust pipe, current-carrying plates installed inside the branch pipes for supplying a dusty gas flow with the possibility of being connected by conductors to a current source, characterized by the fact that the current-carrying plates installed inside the nozzles for supplying a dusty gas flow are arranged in a labyrinth-like manner, forming labyrinth-like corridors.

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