CN104888965B - Online unblocking device for wet electrostatic precipitator nozzle - Google Patents

Abstract

The invention discloses an online unblocking device for a wet electrostatic precipitator nozzle. The online unblocking device comprises a pipeline, a first valve, a second valve and a venturi, wherein the first valve, the second valve and the venturi are arranged on the pipeline. The pipeline has a main and three branches; the free ends of the first and second branches gather and extend to form a nozzle opening used for mounting the nozzle; the free end of the third branch is provided with an unblocking outlet; the venturi is disposed at the connection of the first branch and the main; the first valve and the second valve are arranged on the second branch and the third branch respectively; the online unblocking device further comprises a pressure control system used for detecting pressure of the nozzle opening to control opening and closing of the valves. Automatic transition of the interior pressure and the operating statuses of the valves is controlled without stopping a furnace, thus the nozzle is automatically unblocked; meanwhile, after unblocking, adjusting is automatically performed to allow the nozzle to continue to run. Compared with the traditional unblocking methods, the online unblocking device has the advantages that the performance of a wet electrostatic precipitator is enhanced and the benefit of the wet electrostatic precipitator is greatly improved.

Description

An online plugging device for wet electrostatic precipitator nozzles

technical field

The invention relates to a device for cleaning nozzles, in particular to an online cleaning device for wet electrostatic precipitator nozzles.

Background technique

At present, the wet electrostatic precipitator is a new dust removal equipment used to deal with trace dust and fine particles. It is mainly used to remove dust, acid mist, water droplets, aerosol, odor, PM2.5 and other harmful It is an ideal equipment for controlling air dust pollution. However, at present, the spray nozzles of some wet electrostatic precipitators are all installed inside the wet electrostatic precipitator. When the furnace is not in operation, the interior is full of flue gas, which cannot be entered manually, so the furnace can only be shut down for manual cleaning, which affects production efficiency; and There are problems such as time-consuming and labor-intensive, low efficiency, and unsatisfactory cleaning by manual cleaning.

Contents of the invention

The purpose of the present invention is to provide an on-line cleaning device for wet electrostatic precipitator nozzles, which can realize online automatic cleaning of nozzles. Compared with traditional manual cleaning methods, it not only improves the performance of wet electrostatic precipitators, but also greatly improves The benefits of electrostatic precipitators.

In order to achieve the above object, the solution of the present invention is:

An online plugging device for wet electrostatic precipitator nozzles, including a pipeline, a first valve part, a second valve part and a Venturi tube arranged on the pipeline; the pipeline has a main road and three branch roads; one end of the main road constitutes At the entrance of the pipeline, three branches are connected to the main road, namely the first branch, the second branch and the third branch; the free ends of the first branch and the second branch meet and extend out for nozzle installation the nozzle opening of the third branch, the free end of the third branch is the outlet for unclogging; the Venturi tube is set at the connection between the first branch and the main road, and the first valve and the second valve are respectively arranged at the second branch, On the third branch; the blockage removal device also includes a pressure control system for detecting the pressure at the nozzle opening to control the opening and closing of the first valve and the second valve respectively.

The pressure control system has a pressure switch located next to the nozzle opening, and the first valve part and the second valve part are both electronically controlled components. The pressure switch detects and controls the first valve part by controlling the power on and off. , The second valve part respectively opens and closes.

The first valve part is a normally open solenoid valve, and the second valve part is a normally closed solenoid valve.

The pressure control system also has a pressure gauge, which is installed on the main road.

The pressure control system is also provided with a delayed power-off module, which is electrically connected between the pressure switch and the first and second valve parts, and is used to control the delayed power-off of the first and second valve parts effect.

A one-way valve is also provided on the first branch, and the one-way flow direction of the one-way valve is toward the side where the Venturi tube is located.

The plug-clearing outlet is extended to be set close to the nozzle opening.

A safety valve is also provided beside the pipeline entrance.

The online blockage removal device is also equipped with a device casing, and the pipeline is accommodated in the device casing, and the pipeline inlet, nozzle opening and blockage removal outlet of the pipeline protrude outside the device casing.

After adopting the above-mentioned scheme, the beneficial effect of the present invention compared with the prior art lies in that the online plugging device of the wet electrostatic precipitator nozzle of the present invention works on the principle that when the nozzle is blocked, the pressure inside the pipe triggers the pressure control system, and the Venturi tube (introduced The negative pressure generated by the inlet of the injection fluid at the throat of the injector, combined with the reasonable arrangement of the first valve and the second valve on the pipeline, makes the water and blockages in the nozzle flow out due to the negative pressure, so that In the case of non-stop furnace, control the automatic transformation of the pressure in the pipe and the working state of the valve, so as to realize the automatic unclogging of the nozzle, and automatically adjust after the unclogging is completed, so that the nozzle can continue to work.

Description of drawings

Fig. 1 is the perspective view of the online blockage removal device of the present invention;

Fig. 2 is a front view of the internal structure of the online blockage removal device of the present invention;

Fig. 3 is the schematic diagram when the on-line declogging device of the present invention works normally;

Fig. 4 is a schematic diagram of the online blockage removal device of the present invention when performing blockage removal work.

Label description

Pipeline 1 Main Road 10

Pipe entry 101 First branch 11

Second branch 12 Nozzle opening 121

The third branch 13 Unblocking outlet 131

Venturi 2 First Valve 3

Second Valve 4 Pressure Control System 5

Pressure switch 51 Pressure gauge 52

Check valve 6 Safety valve 7

Device housing 8 Nozzle M.

detailed description

The present case will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

This case involves an online plugging device for wet electrostatic precipitator nozzles, as shown in Fig. Two valve parts 4.

The pipeline 1 has a main path 10 and three branch paths. One end of the main road 10 constitutes a pipe inlet 101 . The three branch roads are all connected to the main road 10 and are respectively the first branch road 11 , the second branch road 12 and the third branch road 13 . The free ends of the first branch 11 and the second branch 12 merge, and the free ends of the pipe extending from the junction constitute a nozzle opening 121 for the nozzle M to be installed. The free end of the third branch 13 is a plugging outlet 131 .

The Venturi tube 2 is arranged at the junction of the first branch 11 and the main path 10 , and the inlet of the adsorption chamber of the Venturi tube 2 is aligned with the first branch 11 . The first valve element 3 and the second valve element 4 are respectively arranged on the second branch path 12 and the third branch path 13 . The online blockage removal device also includes a pressure control system 5, which is used to detect the pressure on the nozzle M at the nozzle port 121, and control the opening or closing of the first valve 3 and the second valve 4 accordingly.

The pressure control system 5 , the present invention provides a specific embodiment, its main component is a pressure switch 51 arranged beside the nozzle opening 121 . Both the first valve part 3 and the second valve part 4 are electronically controlled components. Detect the pressure in the nozzle port 121 through the pressure switch 51 and automatically control the power on and off of the first valve part 3 and the second valve part 4, so as to control the opening or closing of the first valve part 3 and the second valve part 4 respectively . Further, the first valve part 3 is preferably a normally open solenoid valve, and the second valve part 4 is a normally closed solenoid valve. Of course, the pressure control system 5 can also use other methods such as mechanical control in addition to the pressure switch electronic control method. In addition to the electronic control components, the first and second valve parts can also use mechanical components, as long as the detection of nozzle pressure can be realized. It is enough to make relevant branch on-off control.

Preferably, the pressure control system 5 is also provided with a pressure gauge 52 , and the pressure gauge 52 is provided on the main circuit 10 . With the help of the pressure gauge 52, the operator can understand the pressure of the pipeline, and more importantly, through the pressure indication of the pressure gauge 52, it can help to set the working pressure of the pressure switch 51, that is, it can assist the manual setting of the pressure control system 5. time pressure.

When the nozzle M works normally, the passing route is shown by the dotted line in Figure 3, the first valve part 3 (normally open solenoid valve) is in the open state, and the second valve part 4 (normally closed solenoid valve) is in the closed state, from the pipeline It starts from the inlet 101, flows through the main path 10, flows through the second branch path 12 and the first valve element 3 on it, and finally sprays out from the nozzle M. When the nozzle M is blocked, the pressure in the pipe increases, which is detected and controlled by the pressure control system 5, so that the first valve 3 is closed and the second valve 4 is opened. The passage route is shown by the dotted line in Figure 4. Using the negative pressure generated by the Venturi effect, the clogged material passes through the first branch 11 from the nozzle M and through the Venturi tube 2, then passes through the main road 10, and flows to the third branch. The branch path 13 passes through the opened second valve element 4 and finally flows out from the unblocking outlet 131 . When the pressure in the pipe returns to the normal value, the pressure control system automatically adjusts to make the first valve part 3 resume opening, the second valve part 4 resume closing, and finally the nozzle M continues to work.

The pressure switch 51 is used as a switch of the pressure control system 5 to directly control the on-off of the first valve element 3 and the second valve element 4 . This method is suitable for ordinary atomizing nozzles. When the blockage is blocked by the nozzle due to its shape, the pressure switch 51 will act, and a momentary negative pressure will be generated in the nozzle, and the blockage will be impacted and collapsed to facilitate the flow out of the nozzle. Preferably, the pressure control system 5 can also be provided with a delayed power-off module (not shown in the figure), and the delayed power-off module can specifically be a delayed power-off relay, which is electrically connected between the pressure switch 51 and the first Between the first valve part 3 and the second valve part 4, it is used to control the delayed power-off function of the first valve part 3 and the second valve part 4. This method is suitable for fine atomization nozzles. When the blockage cannot flow out of the nozzle, the delayed power-off function of the delay power-off module can make the negative pressure continue to be generated, and the blockage in the nozzle can be sucked back , to facilitate the flow out of the blockage device, and achieve excellent blockage removal effect.

Preferably, a one-way valve 6 is further provided on the first branch 11 , and the one-way flow direction of the one-way valve 6 is toward the side where the Venturi tube 2 is located. The one-way valve 6 is used to prevent the generation of negative pressure which may affect the operation of the nozzle when the nozzle M is in normal operation.

Preferably, the unblocking outlet 131 is extended to be set close to the nozzle opening 121 (nozzle). Herein, during the blockage removal work, the blockage removal outlet 131 can spray the discharged water to the nozzle, which is used to replace the air sucked in by the nozzle from the outside, so as to improve the effect of blockage removal.

Preferably, a safety valve 7 is provided beside the pipeline inlet 101 to play a role of safety protection.

Preferably, the online blockage removal device is also equipped with a closed device casing 8, and the pipeline 1 and its upper parts are housed in the device casing 8, so as to improve the stability of the whole device. In order to facilitate the connection, the pipeline inlet 101 , the nozzle opening 121 and the plug-clearing outlet 131 of the pipeline 1 protrude outside the device housing 8 . In the specific design, the first valve part 3 and the second valve part 4 also expose the device housing 8 to facilitate the connection of wires; the device housing 8 is provided with a wire hole corresponding to the pressure switch 51 to facilitate the extension of the connecting wire 511 of the pressure switch 51. It is convenient to connect outside the device housing 8.

The online blockage removal device of the present invention uses the non-stop automatic switching of the opening and closing of the first and second valve parts to realize online automatic blockage removal without stopping the furnace, and automatically adjusts after the blockage removal is completed to make the nozzle continue to work; Moreover, the water source of the nozzle and the unclogging outlet comes from the water at the pipeline inlet, and the device does not need an additional power source for online unclogging; compared with the traditional manual unclogging method, it not only enhances the performance of the wet electrostatic precipitator, but also greatly improves the efficiency of the wet electrostatic precipitator. The production efficiency of the device greatly reduces the manufacturing cost, thereby realizing the possibility of mass production. In addition, the medium used by the online plugging removal device of the present invention is not limited to liquid water, and gaseous medium is also feasible.

The above descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made in accordance with the scope of the claims of the present invention shall fall within the scope of the claims of the present invention.

Claims (9)

1. a kind of online blockage-clearing device of wet-esp nozzle it is characterised in that：Include pipeline and be located on this pipeline the One valve member, the second valve member and Venturi tube；Pipeline has a main road and three branch roads；One end of main road constitutes entrance, Article three, branch road is connected on main road, respectively tie point, the second branch road and the 3rd branch road；This tie point and the second branch road Free end phase is converged, and extends the jet hole installed for nozzle, and the free end of the 3rd branch road exports for block clearing；Venturi tube It is located at the junction of tie point and main road, the adsorbent chamber entrance be aligned tie point setting of Venturi tube；First valve member, second Valve member is respectively provided at the second branch road, on the 3rd branch road；Blockage-clearing device also includes for detecting that at jet hole, pressure is to control The control pressurer system that one valve member and the second valve member open and close respectively.

2. as claimed in claim 1 a kind of online blockage-clearing device of wet-esp nozzle it is characterised in that：Described Stress control System has the pressure switch being located at jet hole side, and described first valve member, the second valve member are electric control element, are opened by this pressure Close detection and control the keying effect respectively of the first valve member, the second valve member by controlling on/off mode to realize.

3. as claimed in claim 1 or 2 a kind of online blockage-clearing device of wet-esp nozzle it is characterised in that：Described first Valve member is normally open solenoid valve, and the second valve member is normally closed solenoid valve.

4. as claimed in claim 2 a kind of online blockage-clearing device of wet-esp nozzle it is characterised in that：Described Stress control System also has pressure gauge, and this pressure gauge is located on main road.

5. as claimed in claim 2 a kind of online blockage-clearing device of wet-esp nozzle it is characterised in that：Described Stress control System is additionally provided with delay cut-off module, and this delay cut-off module is connected electrically between pressure switch and first, second valve member, for controlling Make the effect of this first, second valve member delay cut-off.

6. as claimed in claim 1 a kind of online blockage-clearing device of wet-esp nozzle it is characterised in that：Described tie point On be additionally provided with check valve, the one-way flow direction of this check valve is the direction towards Venturi tube side.

7. as claimed in claim 1 a kind of online blockage-clearing device of wet-esp nozzle it is characterised in that：Described block clearing outlet Extend close to jet hole setting.

8. as claimed in claim 1 a kind of online blockage-clearing device of wet-esp nozzle it is characterised in that：Described entrance Side is additionally provided with relief valve.

9. as claimed in claim 1 a kind of online blockage-clearing device of wet-esp nozzle it is characterised in that：Described online block clearing Device is also configured with a device case, and pipeline is installed with device case, the entrance of this pipeline, jet hole and block clearing outlet Outside extending apparatus housing.