RU2724780C1 - Device for wet cleaning of gases - Google Patents

Abstract

FIELD: gas purification.SUBSTANCE: invention relates to wet cleaning of contaminated gases of mechanical impurities, dust, aerosols, vapors and gas impurities and can be used in chemical, mining, metallurgical and other industries. Technical result is achieved due to that the device for wet cleaning of gases comprises a housing, which includes an ascending channel, inlet and outlet branch pipes, a tray with a drain nozzle for discharging used sprinkling liquid, a box installed above the housing, a dispersing grid installed inside the ascending channel above the above tray, a drop catcher installed inside the ascending channel; wherein housing is configured to supply sprinkling liquid over dispersing grate, and additionally comprises gas distribution channel with separating partition installed in it, redirecting inlet and outlet flows; at that said gas distributing channel and ascending channel are separated by inner wall of the housing.EFFECT: reduced internal hydraulic resistance with simultaneous reduction of overall dimensions.8 cl, 2 dwg

Description

The invention relates to the wet cleaning of contaminated gases from mechanical impurities, dust, aerosols, vapors and gas impurities and can be used in chemical, mining, metallurgical and other industries.

The prior art patent of the Russian Federation for invention No. 2158166, "Wet gas cleaning apparatus", comprising a cylindrical body with gas supply and exhaust pipes, an irrigation device, a water distributor, a foaming agent made in the form of a horizontal partition, a foam stabilizer located above the annular blade swirler, is known from the prior art. In the direction of the gas-liquid mixture, a droplet eliminator and a protective visor are installed. At the outlet of the scrubber in front of the outlet pipe, a flue gas heater is installed, which provides a temperature of the latter exceeding the dew point temperature. The proposed apparatus provides a three-stage process of emulsification. The contaminated gas stream supplied tangentially to the cylindrical body of the scrubber, passing through the annular blade swirler, is emulsified by the interaction of a swirling gas stream with a countercurrent liquid. The second stage of emulsification is carried out by passing a gas-liquid mixture through a droplet eliminator. The third stage of emulsification occurs in the wall region of the cylindrical body under the visor.

Also known is the RF patent for the invention No. 2163864 "Method for wet cleaning of gases and a device for its implementation", according to which the flow of contaminated gas swirled by a tangential inlet is fed into an annular gap in which gas is swirled in the opposite direction with a blade swirl and the gas-liquid mixture is emulsified over a wide range of speeds . The method is implemented in a device for wet cleaning of gases, comprising a cylindrical body, a tangential gas supply pipe, a disk-shaped liquid dispenser, a blade swirler placed in an annular slot with a swirl opposite the inlet pipe. The outer ends of the outlet edges of the swirlers are raised above the inner adjacent to the fluid dispenser. The inlet pipe of the scrubber is equipped with nozzles for washing off dust deposits and a system of automatic periodic supply of flushing water, triggered by a vacuum in the duct and blowing nozzles with atmospheric air. The scrubber body is made in the form of a regular prism, and the liquid dispenser is a polygon similar to the base of the prism.

Most systems are designed so that air is supplied from below, higher is an irrigation liquid, and the purified gas comes out from above.

The closest technical solution is “DEVICE FOR WET GAS CLEANING” RU PM 167822, comprising a housing, an inlet and an outlet, an irrigation device, a horizontal blowing agent, a swirl, a separator, characterized in that the housing is rectangular, the bottom of which has a pallet connected with a horizontal foaming agent, which is a spray grate consisting of cells, and above the grate there is a separator made in the form of a hollow cylindrical pipe with drain tubes connected in its lower part to a conical swirl with tangentially directed swirl blades uniformly rigidly fixed on its side surface, the lateral surfaces of the cells are formed by truncated rectangular trapezoids, the large bases of which are adjacent to smaller bases, and the upper slit-like surface of the cells is formed by triangles connected at the vertices, the bases of which are the inclined sides of the truncated rectangular trapezoid.

The disadvantage of the closest analogue and solutions known from the prior art are the large dimensions of the devices with the purification of contaminated gas in the ascending channel due to the placement of inlet pipes in the lower part (pallet) and outlet pipes in the upper part (box) of these devices. Moreover, such an arrangement of the nozzles, especially the inlet, leads to increased hydraulic resistance of the device caused by the need to drastically change the direction of the flowing gas, which has a high speed.

The technical problem of the claimed invention is to eliminate the disadvantages of the known solutions.

The technical result achieved by the use of this invention is that due to the reduction in gas velocities due to the design of the claimed device, a decrease in internal hydraulic resistance is provided, while reducing the dimensions of the device.

The technical result is achieved due to the fact that the device for wet cleaning of gases contains a housing including an upward channel, an inlet and an outlet pipe, a tray with a drain pipe for draining the spent irrigating liquid, a box mounted above the housing, a dispersion grid installed inside the upward channel above said drip tray, a droplet eliminator installed inside the ascending channel; however, the housing is made with the possibility of supplying irrigation fluid over the dispersing grid, and also further comprises a gas distribution channel with a dividing wall installed in it, redirecting the input and output flows; while the specified gas distribution channel and the upward channel are separated by a common inner wall of the housing.

An additional feature is that the dividing wall is located with the upper edge at the top of the inlet pipe, and the bottom at the bottom of the outlet pipe.

An additional feature is that the inlet and outlet nozzles are located on opposite vertical walls of the gas distribution channel.

An additional feature is that the inlet and outlet nozzles are located opposite each other at the same level.

An additional feature is that the housing may include an insert for installing dispersion gratings.

An additional feature is that the housing may include an insert for installing drop eliminators.

An additional feature is that in the ascending channel there is an additional dispersing grating.

An additional feature is that the dispersion gratings are located one above the other.

The invention is illustrated in FIG. 1 and 2:

FIG. 1 - Scheme of movement of the purified gas through the device.

FIG. 2 - An example of a device with two stages of cleaning,

Where:

1 - ascending channel;

2 - pallet;

3 - box;

4 - gas distribution channel;

5 - inner wall separating the ascending and gas distribution channels

6 - inlet pipe;

7 - outlet pipe;

8 - dividing wall;

9 - gas entering the device;

10 - gas leaving the device;

11 is an insert for installing the first dispersion grating;

12 is an insert for installing a second dispersion grating;

13 - an insert for installing drop eliminators;

14 - the first dispersive grating;

15 - the second dispersive grating;

16 - drip tray.

The invention (figure 1) is as follows: the device body consists of an upward channel (1) and a gas distribution channel (4) located on the side of it, while these channels are divided by the inner wall of the body (5), the pallet (2) is located under the body , and the box (3) above the body. The inlet (6) and outlet (7) nozzles are located on opposite vertical walls of the gas distribution channel (4).

Inside the gas distribution channel (4) there is a dividing wall (8) installed obliquely with respect to the ascending channel (1) so that the upper edge of the dividing wall is located at the upper part of the inlet pipe (6), and the lower edge is at the lower part of the output pipe ( 7). As a result, the dividing wall (8) directs the inlet gas stream (9) from the inlet pipe (6) to the pallet (2), and the gas outlet stream (10) from the duct (3) to the outlet pipe (7). The tray (2) is equipped with a drain pipe for draining the spent irrigation fluid.

Figure 1 does not show the dispersion grid, droplet eliminators and the supply of irrigation fluid.

The claimed device can be made with either one or several levels of dispersion gratings located one above the other in the upward channel.

Figure 2 shows a variant of the device containing two levels of dispersion gratings (14, 15). To simplify the assembly of the device, the housing is made with inserts (11, 12, 13), on which dispersing grids (14, 15) and a droplet eliminator (16) are fixed.

The device operates as follows. Due to the pressure difference created by any external device, for example, a fan, contaminated gas (9) enters the inventive device through an inlet pipe (6) located in the vertical wall of the gas distribution channel (4).

In the gas distribution channel (4), due to the dividing wall (8) installed in it, located at its upper edge at the upper part of the inlet pipe (6), and the lower one at the lower part of the output pipe (7), the contaminated gas (9) deviates down into the pallet (2), from where it enters the upward channel (1) from below. When passing from bottom to top through one or more dispersing gratings installed in the respective inserts (11, 12), onto which the irrigation liquid comes from the irrigation device (not shown in the figures), gas and liquid form a gas-liquid mixture in which intense heat and mass transfer occurs purification of gases from solid and gas inclusions.

Then, the purified gas through the upward channel (1) enters the droplet eliminator (16) located in the insert (13), where splashes and drops of liquid carried away by the high-speed stream are separated and the gas released from the residual droplet moisture enters the box (3). From the duct (3) located on top, the gas enters the gas distribution channel, where, due to the dividing wall (8), it deviates sideways and leaves the inventive device (10) through the outlet pipe (7) made in the side wall of the gas distribution channel (4) and located at the same level with the inlet pipe (6).

Thus, the design of the claimed device, in particular, the implementation of the ascending channel, gas distribution channel, which simultaneously performs the functions of redistributing both contaminated and purified gas, duct and sump allows you to provide a low gas flow rate for cleaning and after cleaning, thereby reducing the internal hydraulic resistance at the same time with a decrease in external dimensions.

Also, the location of the inlet and outlet pipes opposite each other, at the same level, provides an additional technical effect, which consists in simplifying the connection of the inventive device to external flues.

The device operates as a part of filtering and ventilation systems, additionally equipped with adapters, a fan, devices for the selection of contaminated gas, suitable and exhaust ventilation lines, and a system for supplying and receiving irrigation liquid.

Claims (16)

1. A device for wet cleaning of gases, comprising a housing, including ascending channel, inlet and outlet pipes, a dispersion grid installed inside the ascending channel above said pallet, drip tray installed inside the ascending channel; while the housing is made with the possibility of supplying irrigation fluid above the dispersion grid, a box mounted above the housing a pan with a drain pipe for draining the spent irrigation fluid, characterized in that additionally contains a gas distribution channel with a dividing wall installed therein, redirecting the input and output flows; while the specified gas distribution channel and the ascending channel are separated by an inner wall of the housing. 2. The device according to p. 1, characterized in that the dividing wall is placed at the top edge at the top of the inlet pipe, and the bottom at the bottom of the outlet pipe. 3. The device according to p. 1, characterized in that the inlet and outlet nozzles are located on opposite vertical walls of the gas distribution channel. 4. The device according to paragraphs. 1 and 3, characterized in that the inlet and outlet nozzles are located opposite each other at the same level. 5. The device according to p. 1, characterized in that the housing contains inserts for installing dispersing gratings. 6. The device according to p. 1, characterized in that the housing contains inserts for installing a drip tray. 7. The device according to p. 1, characterized in that in the ascending channel there is an additional dispersing grating. 8. The device according to paragraphs. 1 and 7, characterized in that the dispersion gratings are located one above the other.

Images