CN111617883A

CN111617883A - Wet-type electric dust collector flushing system and method thereof

Info

Publication number: CN111617883A
Application number: CN202010339820.9A
Authority: CN
Inventors: 张瑞瑞; 陈芳; 李玲燕; 马鸿良; 李宗强
Original assignee: Shandong Shenhua Shanda Energy and Environment Co Ltd
Current assignee: Shandong Shenhua Shanda Energy and Environment Co Ltd
Priority date: 2020-04-26
Filing date: 2020-04-26
Publication date: 2020-09-04

Abstract

The invention belongs to the field of wet-type electric precipitator washing, and provides a wet-type electric precipitator washing system and a method thereof. In order to solve the problems of high cost and poor washing effect of the washing system of the existing wet electric dust remover, the provided washing system only comprises a set of washing pipe network and is arranged in the wet electric dust remover; the washing pipe network is arranged below the wet-type electric dust removal cathode supporting beam and above the anode supporting beam; the flushing pipe network consists of a flushing main pipe and a plurality of flushing branch pipes communicated with the flushing main pipe, and flushing nozzles are uniformly arranged on each flushing branch pipe at intervals; the main washing pipe is arranged along the anode supporting beam, and the branch washing pipes are horizontally arranged along the anode upper flower plate; the washing nozzle is vertically upwards installed and used for uniformly spraying washing water on the dehumidifying section. The blockage of the dripping holes of the anode flushing pipe can not occur during formal operation, thereby avoiding the waste of maintenance cost and operation cost.

Description

Wet-type electric dust collector flushing system and method thereof

Technical Field

The invention belongs to the field of wet-type electric precipitator washing, and particularly relates to a wet-type electric precipitator washing system and a method thereof.

Background

The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.

The high-efficiency water-free wet electric dust remover cleans ash by flushing the surfaces of dust collecting electrodes and discharge electrodes by water films. Two layers of washing pipe networks are arranged in the high-efficiency water-free wet electric dust remover: a cathode washing pipe network and an anode washing pipe network. The flushing pipe network mainly performs flushing before starting and flushing after shutdown, and regularly flushes when in normal operation, and the flushing frequency is once every two weeks. The cathode and anode washing is carried out by partitioning and washing through arranging an electric valve, the cathode washing is carried out by spraying and washing through a nozzle arranged on a washing pipe network, and the anode washing is carried out by drilling holes (aperture phi 4mm) on a square pipe which is also used as an anode supporting frame and introducing washing water for dripping, spraying and wetting and washing (hereinafter referred to as an anode pipe network).

The inventor discovers through practical operation conditions and practical investigation of a plurality of projects which are put into operation that the cathode and anode flushing system of the high-efficiency anhydrous wet-type electric dust collector has better effect when being put into operation at first, but along with the extension of operation time, adhesive liquid drops carried in flue gas from a wet absorption tower can be slowly gathered on an anode pipe network and are precipitated in a plate-connection mode, so that the blockage of a dripping hole of the anode pipe network is caused, the flushing effect and the setting significance of an anode flushing pipe network are lost, and the waste of equipment investment and operation maintenance investment is caused.

Disclosure of Invention

In order to solve the above problems, a first aspect of the present invention provides a wet electrostatic precipitator flushing system, which combines a cathode and an anode flushing pipe network, changes the arrangement position of a flushing water pipe, improves the connection mode of a main flushing pipe and a branch flushing pipe, and changes the installation direction of a flushing nozzle to spray flushing water on a dehumidification section at an optimal scattering and free falling angle, thereby reducing the number of control valves of the flushing pipe network and the input amount of the flushing water, and really realizing low-cost and high-efficiency operation of dehumidification.

In order to achieve the purpose, the invention adopts the following technical scheme:

a wet-type electrostatic precipitator washing system only comprises a set of washing pipe network and is arranged in a wet-type electrostatic precipitator; the washing pipe network is arranged below the cathode supporting beam and above the anode supporting beam; the flushing pipe network consists of a flushing main pipe and a plurality of flushing branch pipes communicated with the flushing main pipe, and flushing nozzles are uniformly arranged on each flushing branch pipe at intervals; the main flushing pipe is arranged along the anode supporting beam, and the branch flushing pipe is horizontally arranged along the pattern plate connected with the anode; the washing nozzle is vertically upwards installed and used for uniformly spraying washing water on the dehumidifying section.

In one embodiment, the connection between the main flushing pipe and the branch flushing pipe is a pipe bottom butt joint.

In one embodiment, the main flushing pipe and the branch flushing pipe are butted through seal welding.

As an implementation mode, the flushing branch pipes are horizontally arranged along the pattern plate connected with the anode at the interval of 2-3 times of the square holes of the anode.

As one embodiment, the main flush pipe is supported by an anode support beam.

As an embodiment, the flushing manifold is supported by an anode support beam.

In one embodiment, the flushing manifold is supported by a support ring plate connected to the anode.

In one embodiment, the flushing nozzle is connected with the flushing branch pipe through a threaded nozzle base.

As an implementation mode, the sight glass is arranged on the shell of the wet electric dust collector in the installation range of the washing pipe network, so that the running condition of the washing system can be conveniently mastered at any time.

In order to solve the above problems, a second aspect of the present invention provides a method for washing a wet electric precipitator washing system, which sprays washing water onto a cross section of the wet electric precipitator at an optimal scattering and free-fall angle, reduces the amount of washing water input, and realizes efficient operation of dehumidification.

a method of flushing a wet electric precipitator flushing system, comprising:

setting a region to be washed and washing time;

and opening a flushing pipe network switch valve matched with the area to be flushed, and flushing within set flushing time to spray flushing water sprayed by the flushing nozzle onto the dehumidifying cross section at an optimal scattering and free falling angle.

The invention has the beneficial effects that:

(1) the wet-type electric dust collector flushing system reduces the equipment and installation cost of a valve and a control system thereof, a pipeline supporting beam and the like on the initial investment of a wet-type electric dust collector, and does not generate the waste of maintenance cost and operation cost caused by blocking an anode flushing pipe orifice in formal operation;

(2) the invention changes the connection mode of the main flushing pipe and the branch flushing pipe from the conventional equal center elevation connection into the pipe bottom butt connection, ensures the thorough emptying of the main flushing pipe after the flushing is stopped, and avoids the series problems of corrosion, scaling and the like caused by long-time water accumulation in the pipe;

(3) the invention changes the installation direction of the washing nozzle, and can also spray washing water on the dehumidification cross section at the optimal scattering and free falling angle, thereby reducing the washing water input and really realizing the high-efficiency operation of dehumidification.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.

FIG. 1 is a flush water network floor plan of an embodiment of the present invention;

FIG. 2 is a facing view of a flush water network in accordance with an embodiment of the present invention;

FIG. 3 is a schematic view showing the connection between a main flushing pipe and a branch flushing pipe in the flushing water pipe network according to the embodiment of the present invention;

FIG. 4 is a schematic view of a flush nozzle installation of an embodiment of the present invention.

Wherein, 1-dehumidifying the shell; 2-flushing the main pipe; 3-an anode support beam; 4-flushing the branch pipe; 5-anode square hole; 6-washing the nozzle; 7-a cathode support beam; 8-cathode lines; 9-pattern plate; 10-a threaded nozzle base; 11-sight glass.

Detailed Description

The invention is further described with reference to the following figures and examples.

It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

In the present invention, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only terms of relationships determined for convenience of describing structural relationships of the parts or elements of the present invention, and are not intended to refer to any parts or elements of the present invention, and are not to be construed as limiting the present invention.

In the present invention, terms such as "fixedly connected", "connected", and the like are to be understood in a broad sense, and mean either a fixed connection or an integrally connected or detachable connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be determined according to specific situations by persons skilled in the relevant scientific or technical field, and are not to be construed as limiting the present invention.

In view of the jam condition that wet-type electrostatic precipitator positive pole rinse-system easily appears, this embodiment is starting from retrenching the wet-type dehumidification rinse-system under the prerequisite of guaranteeing the operation effect, has proposed the technical scheme who cancels a wet-type dehumidification positive pole rinse-system, and it only includes one set of washing pipe network, and sets up inside wet-type electrostatic precipitator.

FIG. 1 shows a flush water network floor plan; figure 2 shows a flush water pipe network floor plan. As shown in fig. 1 and 2, the washing pipe network of the present embodiment is installed above the anode support beam 3 and below the cathode support beam 7. Among them, the cathode support beam 7 is for supporting the cathode line 8.

The washing pipe network is by washing main pipe 2 and a plurality of washing branch pipe 4 that is linked together and constitute, and the interval has evenly arranged washing nozzle 6 on every washing branch pipe 4, for example: the flushing branch pipes are uniformly provided with flushing nozzles at intervals of 600-700 mm (taking integral multiple of 10). In particular, the specific spacing of the flushing nozzles may be set by itself depending on the actual length of the flushing manifold. Wherein, the purpose that the interval evenly arranged has washing nozzle is: so that the washing water sprayed by the washing nozzle is uniformly sprayed on the dehumidifying cross section, and the spraying coverage rate of the dehumidifying cross section during washing is ensured. The washing branch pipes are horizontally arranged along the pattern plate connected with the anode, and the existing equipment in the dehumidification device is utilized to support the pipe network, so that the trouble of independently arranging a supporting beam for washing the pipe network is avoided.

In this embodiment, the main washing pipe 2 is arranged along the anode supporting beam 3, the branch washing pipes 4 are arranged horizontally along the faceplate 9 connected to the anode, and the washing nozzles 6 are directed vertically upward so that the washing water sprayed from the washing nozzles is uniformly sprayed on the dehumidifying section.

Specifically, the flushing branch pipes are horizontally arranged along the pattern plate connected with the anode at the interval of 2-3 times of the square holes of the anode, and the value is 2 times under the common condition. The washing of this embodiment is responsible for and is washed the position that the branch pipe has all avoided the negative pole line, avoids disturbing the negative pole line and discharges, has ensured wet-type electrostatic precipitator's dust removal effect.

In a specific implementation, the main wash pipe is supported by an anode support beam; the flushing branch pipe is supported by an anode supporting beam.

In other embodiments, the flush manifold is supported by a support ring plate that is connected to the anode.

Specifically, the structures of the flushing nozzle, the flushing main pipe and the flushing branch pipe are all the existing structures, and the flushing main pipe and the flushing branch pipe are made of the same material. Also in this embodiment, the flushing nozzles on all flushing manifolds are identical in structure, shape and size.

In order to facilitate the butt joint between the main flushing pipe 2 and the branch flushing pipe 4, materials are saved, the main flushing pipe 2 is completely emptied without accumulated water after flushing is finished, and the main flushing pipe 2 and the branch flushing pipe 4 are connected in a mode of butt joint of pipe bottoms, as shown in figure 3.

In order to facilitate the sealing performance between the main flushing pipe 2 and the branch flushing pipe 4, the main flushing pipe 2 and the branch flushing pipe 4 are butted through seal welding.

In this embodiment, the viewing mirror 11 with the self-cleaning device is arranged on the housing of the wet electric dust collector in the installation range of the washing pipe network, so that the running condition of the washing system can be conveniently mastered at any time.

Specifically, the self-cleaning device comprises a microprocessor, a peristaltic pump and a brush, wherein the microprocessor is used for controlling the action of the peristaltic pump, and the peristaltic pump is used for driving the brush to clean the sight glass. The microprocessor can be realized by a 51 series single chip microcomputer, and the model of the peristaltic pump can be selected according to the specific requirements of the technical personnel in the field.

It should be noted that in other embodiments, the main flushing pipe 2 and the branch flushing pipe 4 may be connected by other means, such as a screw-fastening connection, and those skilled in the art may specifically select the connection according to actual situations.

As shown in fig. 4, the flushing nozzle 6 is connected to the flushing manifold 4 by means of a threaded nozzle mount 10. Thus, when the washing nozzle is damaged, the washing nozzle can be replaced in time, and the washing effect of the wet electric dust collector is guaranteed.

In this embodiment, the wet electrostatic precipitator flushing system sets a one-to-one flushing area, a one-to-one flushing pipe network switch valve (generally an electric valve) and a flushing time in the same electric field according to the division of the electric field inside the wet electrostatic precipitator, and the flushing start and stop of different areas are controlled by the corresponding switch valves.

For example: four electric fields are arranged inside the wet electric dust collector, online independent partition washing of a single wet-type electric field is realized through the design of a washing water system, namely, when a certain electric field is washed, the adjacent electric fields of the electric field are subjected to voltage reduction operation, other electric fields can still normally operate, and the dust removal effect stability of the wet electric dust collector is ensured.

The inside electric field of wet-type electrostatic precipitator of this embodiment divides to set up and the electric field one-to-one washes the region, and when single electric field washed, can not influence the work of other electric fields in the dehumidification portion, has really realized wet-type electrostatic precipitator's online washing.

The embodiment also arranges a viewing mirror with a self-cleaning device on the shell of the wet electric dust collector and near the installation of the flushing pipe, so as to observe the running condition of the flushing pipe network at any time when the flushing system is started.

The embodiment greatly reduces the equipment investment and the operating cost through simplification, and really realizes cost saving, energy saving and consumption reduction.

The washing principle of the wet-type electric dust collector washing system of the embodiment is as follows:

setting the area to be flushed and the flushing time, for example: the wet electric dust collector is internally provided with four electric fields which correspond to four washing areas, namely a first washing area, a second washing area, a third washing area and a fourth washing area; the flushing time of the corresponding flushing area can be set according to the actual situation, such as: 5min and the like;

In the specific implementation, a one-to-one flushing area, a one-to-one flushing pipe network switch valve (generally an electric valve) and flushing time of the same electric field are set, and the flushing start and the flushing stop of different areas are controlled by the corresponding switch valves, so that the electric fields do not interfere with each other during flushing, and the online flushing mode of the wet electric dust collector is realized.

The wet-type electric dust collector flushing system can reduce the equipment and installation cost of valves, pipelines and the like on the initial investment of a wet-type dehumidification system; the waste of maintenance cost and operation cost caused by the blockage of the anode flushing pipe orifice can not occur in formal operation; the installation direction of the washing nozzle is changed, so that washing water can be sprayed on the dehumidifying cross section at the optimal scattering and free falling angle, the washing water input amount is reduced, and the efficient operation of dehumidification is really realized; the connection mode between the main flushing pipe and the branch flushing pipe is changed from conventional equal-center elevation connection into pipe bottom butt connection, so that the main flushing pipe is ensured to be thoroughly emptied, and series problems of corrosion, scaling and the like caused by long-time water accumulation in the pipe are avoided; the sight glass with the self-cleaning device is arranged on the shell of the wet electric dust collector in the installation range of the washing pipe network, so that the running condition of the washing system can be conveniently mastered at any time.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A wet-type electrostatic precipitator washing system is characterized by only comprising a set of washing pipe network and arranged inside a wet-type electrostatic precipitator; the washing pipe network is arranged below the cathode supporting beam and above the anode supporting beam; the flushing pipe network consists of a flushing main pipe and a plurality of flushing branch pipes communicated with the flushing main pipe, and flushing nozzles are uniformly arranged on each flushing branch pipe at intervals; the main flushing pipe is arranged along the anode supporting beam, and the branch flushing pipe is horizontally arranged along the pattern plate connected with the anode; the washing nozzle is vertically upwards installed and used for uniformly spraying washing water on the dehumidifying section.

2. The wet electric dust collector flushing system of claim 1, wherein the main flushing pipe and the branch flushing pipe are connected in a pipe bottom butt joint mode.

3. The wet electric dust collector flushing system of claim 2, wherein the main flushing pipe and the branch flushing pipes are butted by seal welding.

4. The wet electric dust collector washing system of claim 1, wherein the washing branch pipes are horizontally arranged along the pattern plate connected with the anode at an interval of 2-3 times of the square holes of the anode.

5. The wet electric precipitator washing system of claim 1, wherein the washing main pipe is supported by an anode support beam.

6. The wet electric dust collector flushing system of claim 1, wherein the flushing branch pipes are supported by anode support beams.

7. The wet electric dust collector flushing system of claim 1, wherein the flushing branch pipes are supported by a support ring plate connected with the anode.

8. The wet electric precipitator washing system of claim 1, wherein the washing nozzles are connected to the washing manifolds by threaded nozzle mounts.

9. The wet electric dust collector flushing system of claim 1, wherein a sight glass is arranged on the wet electric dust collector shell in the installation range of the flushing pipe network, so that the running condition of the flushing system can be conveniently mastered at any time.

10. A method of flushing a wet electric precipitator cleaning system according to any of claims 1-8, comprising:

setting a region to be washed and washing time;