CN216717138U - Back washing device of plate heat exchanger - Google Patents

Abstract

The utility model relates to the technical field of plate heat exchangers, in particular to a backwashing device of a plate heat exchanger, which comprises a console and at least two backwashing modules, wherein the console and the at least two backwashing modules are arranged near the plate heat exchanger, and the corresponding medium inlet pipe and the corresponding medium outlet pipe are fixedly connected to the plate heat exchanger at the position corresponding to the input and the output of each medium. The beneficial effects are that: the backwashing device of the plate type heat radiator designed by the utility model can be cleaned at a high speed, and can be inserted into backwashing operation more frequently in the working period of the plate type heat exchanger, so that the service life of equipment can be effectively prolonged, flushing liquid in the cleaning process can be repeatedly recycled, resources are saved, on the other hand, cleaned impurities can be manually removed after being collected by a separation filter, the normal work of the plate type heat exchanger cannot be influenced in the cleaning process of the separation filter, and the occupation of the working time of the plate type heat radiator is further reduced.

Description

Back washing device of plate heat exchanger

Technical Field

The utility model relates to the technical field of machining, in particular to a backwashing device of a plate heat exchanger.

Background

The plate heat exchanger is efficient medium heat exchange equipment, and has the advantages of high thermal efficiency, small heat loss, compact structure, small occupied area and the like, but impurities in the medium can be retained in the plate heat exchanger when the medium is subjected to heat exchange, so that the heat exchange efficiency is reduced due to obstruction in the plate heat exchanger. At the moment, manual cleaning and maintenance are needed, but the manual cleaning and maintenance time is long, and the normal work of the plate heat exchanger is seriously delayed. The existing equipment for cleaning the plate heat exchanger by adopting a backflushing mode also needs to consume a large amount of time to access the equipment again, the phenomenon that flushing liquid for flushing is wasted also exists in the flushing process, and the whole flushing process also needs manual participation, so that the existing production requirement is difficult to meet.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a back washing device of a plate heat exchanger, which solves the problem that the prior plate heat radiator in the background art is short in washing time and easy to use.

In order to achieve the purpose, the utility model provides the following technical scheme: the back washing device of the plate heat exchanger comprises a control console and at least two back washing modules which are arranged near the plate heat exchanger, wherein the plate heat exchanger is fixedly connected with a corresponding medium inlet pipe and a corresponding medium outlet pipe at the positions corresponding to the input and the output of the seed killing medium;

the backwashing module comprises a first connecting pipe, a first return pipe, a medium filter, a liquid storage tank, a second return pipe, a second connecting pipe and a separation filter, and the medium filter is arranged in the middle of the first connecting pipe;

the front end of the first connecting pipe is provided with a second main valve at the position corresponding to the connection with the external medium recovery equipment, the tail end of the first connecting pipe is connected with the medium inlet pipe, the front end of the second connecting pipe is provided with a first main valve at the position corresponding to the connection with the external medium supply equipment, and the tail end of the second connecting pipe is connected with the medium outlet pipe;

the tail end of the first connecting pipe is connected with the second return pipe, a second selection valve is arranged in the middle of the second return pipe, the first connecting pipe is connected with the first return pipe at the middle position corresponding to the second main valve and the medium filter, and a first selection valve is arranged in the middle of the first return pipe;

the middle part fixed mounting of separation filter has the seal seat, and fixed mounting has the filter screen that is used for being divided into upper and lower two parts with separation filter's inside on the seal seat, the end of first return flow pipe and second return flow pipe all communicates with the lower part of separation filter inner chamber, and the inner chamber upper portion of separation filter communicates with the inner chamber of liquid reserve tank, install the circulating pump with the inside intercommunication of liquid reserve tank on the liquid reserve tank, and the output of circulating pump and the terminal intercommunication of second connecting pipe, the control cabinet pass through the cable respectively with first main valve, second main valve, first selection valve, second selection valve, closed valve and circulating pump electric connection.

Preferably, the inside of the console is provided with an S7-200 type PLC controller and a display electrically connected with the controller, and the bottom of the console is provided with a roller.

Preferably, the bottom of the separation filter is provided with a second liquid discharge pipe communicated with the inside of the separation filter and used for discharging impurities, the second liquid discharge pipe is provided with a second liquid discharge valve electrically connected with the control console, the bottom of the separation filter is provided with a steel frame used for supporting, and the filter screen and the inner wall of the separation filter are tightly attached and clamped through a rubber pad or a soft plastic pad.

Preferably, the inside of the medium filter adopts a metal filter screen, a filter bag or a filter membrane for filtering operation, and the medium filter adopts a flange plate to be connected to the first connecting pipe.

Preferably, the upper end of the liquid storage tank is provided with a tank cover through clamping and sealing, and the tank cover is fixedly provided with a handle convenient for opening the tank cover through a bolt.

Preferably, a liquid supply pump for supplying the washing liquid to the interior of the liquid storage tank is fixedly installed on the liquid storage tank, and a liquid inlet of the liquid supply pump is connected to an external washing liquid supply device.

Preferably, the bottom of liquid reserve tank is connected with first drain pipe, and installs the first hydroecium valve that is used for controlling first drain pipe flowing back on the first drain pipe.

Compared with the prior art, the utility model has the beneficial effects that: the backwashing device of the plate type heat radiator can quickly remove impurities in the plate type heat exchanger and can also clean impurities in the medium filter, so that the requirement for manually cleaning the whole equipment is reduced, the cleaning speed is high, backwashing operation can be more frequently inserted in the working period of the plate type heat exchanger, the service life of the equipment can be effectively prolonged, flushing liquid in the cleaning process can be repeatedly recycled, resources are saved, on the other hand, the cleaned impurities can be manually removed after being collected by the separating filter, the normal work of the plate type heat exchanger cannot be influenced in the cleaning process of the separating filter, the occupation of the working time of the plate type heat radiator is further reduced, and the backwashing device has high practical value.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural diagram of a backwash module of the present invention;

FIG. 3 is a schematic view of the structure of the liquid storage tank of the present invention;

FIG. 4 is a schematic view of the installation of the first and second connection pipes of the present invention;

FIG. 5 is a schematic view of the structure of the separation filter of the present invention.

In the figure: 1. a plate heat exchanger; 2. a backwashing module; 201. a first connecting pipe; 202. a first return pipe; 203. a media filter; 204. a liquid storage tank; 205. a second return pipe; 206. a second connecting pipe; 207. A separation filter; 3. a circulation pump; 4. a liquid supply pump; 5. a filter screen; 6. a seal seat; 7. a second drain valve; 8. a second drain pipe; 9. a first main valve; 10. a second main valve; 11. a first selector valve; 12. a closing valve; 13. a second selector valve; 14. a handle; 15. a box cover; 16. a first drain pipe; 17. a first drain valve; 18. a console; 19. a media inlet pipe; 20. a media outlet pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be described in detail below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art without creative efforts based on the technical solutions of the present invention belong to the protection scope of the present invention.

Referring to fig. 1 to 5, the present invention provides a technical solution: the backwashing device of the plate heat exchanger comprises a control console 18 and at least two backwashing modules 2 which are arranged near the plate heat exchanger 1, wherein the plate heat exchanger 1 is fixedly connected with a corresponding medium inlet pipe 19 and a corresponding medium outlet pipe 20 at the positions corresponding to the input and the output of seed-killing media;

referring to fig. 2 to 4, the backwashing module 2 includes a first connection pipe 201, a first return pipe 202, a media filter 203, a tank 204, a second return pipe 205, a second connection pipe 206, and a separation filter 207, and the media filter 203 is installed at a middle portion of the first connection pipe 201, a second main valve 10 is installed at a front end of the first connection pipe 201 corresponding to a connection with an external media recovery apparatus, and a terminal end of the first connection pipe 201 is connected with a media inlet pipe 19, a first main valve 9 is installed at a front end of the second connection pipe 206 corresponding to a connection with an external media supply apparatus, and a terminal end of the second connection pipe 206 is connected with a media outlet pipe 20, a terminal end of the first connection pipe 201 is connected with the second return pipe 205, and a second selection valve 13 is installed at a middle portion of the second return pipe 205, the first connection pipe 201 is connected with the first return pipe 202 at a middle position corresponding to the second main valve 10 and the media filter 203, a first selector valve 11 is arranged in the middle of the first return pipe 202;

referring to fig. 1 to 5, a sealing seat 6 is fixedly installed at the middle portion of the separation filter 207, a filter screen 5 for dividing the interior of the separation filter 207 into an upper portion and a lower portion is fixedly installed on the sealing seat 6, the ends of the first return flow pipe 202 and the second return flow pipe 205 are both communicated with the lower portion of the inner cavity of the separation filter 207, the upper part of the inner cavity of the separation filter 207 is communicated with the inner cavity of the liquid storage tank 204, the liquid storage tank 204 is provided with a circulating pump 3 communicated with the inside of the liquid storage tank 204, the output end of the circulating pump 3 is communicated with the tail end of the second connecting pipe 206, the control console 18 is electrically connected with the first main valve 9, the second main valve 10, the first selection valve 11, the second selection valve 13, the closing valve 12 and the circulating pump 3 through cables, an S7-200 type PLC controller and a display electrically connected with the controller are arranged in the control console 18, and the bottom of the control console 18 is provided with a roller;

referring to fig. 5, a second drain pipe 8 for discharging impurities is installed at the bottom of the separation filter 207 and is communicated with the inside of the separation filter 207, a second drain valve 7 electrically connected to the console 18 is installed on the second drain pipe 8, a steel frame for supporting is installed at the bottom of the separation filter 207, and the filter screen 5 and the inner wall of the separation filter 207 are tightly fitted and clamped by a rubber pad or a soft plastic pad;

referring to fig. 3 to 5, the inside of the medium filter 203 adopts a metal filter net, the filter bag or the filter membrane performs filtering operation, the medium filter 203 adopts a flange plate to be connected to the first connecting pipe 201, the upper end of the liquid storage tank 204 is provided with the tank cover 15 through clamping and sealing, the tank cover 15 is provided with the handle 14 convenient for opening the tank cover 15 through bolt fixing, the liquid storage tank 204 is provided with the liquid supply pump 4 for supplying flushing liquid to the inside of the liquid storage tank 204, a liquid inlet of the liquid supply pump 4 is connected to an external supply device, the bottom of the liquid storage tank 204 is connected with the first drainage pipe 16, and the first drainage pipe 16 is provided with the first drainage valve 17 for controlling drainage of the first drainage pipe 16.

The working principle is as follows: the plate heat exchanger 1 of the present invention is mainly of a type that two media are used for mutual heat exchange, and a corresponding back washing module 2 is respectively installed for the two media to realize rapid back washing, and the working principle of any one of the back washing modules 2 will be described below. In the normal operation process of the plate heat exchanger 1, the first selector valve 11 and the second selector valve 13 are in a closed state, the first main valve 9, the second main valve 10 and the closing valve 12 are in an open state, at this time, the external medium supply device directly sends corresponding media into the medium inlet pipe 19 from the first connecting pipe 201, the corresponding media flow out to the second connecting pipe 206 from the medium outlet pipe 20 through the heat exchange port of the plate heat exchanger 1, and finally the media are recovered by the external medium recovery device connected with the second connecting pipe 206, so that the heat exchange process of the media is completed, and in the process, the medium filter 203 also primarily filters part of impurities in the media. When the native heat exchanger 1 needs to be backwashed, the external medium supply device and the external medium recovery device are first stopped, the first main valve 9 and the second main valve 10 are closed, and then the cleaning is performed by adopting a two-step cleaning procedure: in the first step of cleaning procedure, the first selection valve 11 and the closing valve 12 are in a closed state, the second selection valve 13 is in an open state, at this time, the circulating pump 3 reversely feeds the flushing liquid in the liquid storage tank 204 into the plate heat exchanger 1 through the medium outlet pipe 20 via the second connecting pipe 206, so that the flushing liquid flushes the interior of the plate heat exchanger 1 at a high speed, the waste liquid is fed into the first connecting pipe 201 via the medium inlet pipe 19, then flows into the separation filter 207 via the second return pipe 205 and is filtered via the filter screen 5, the flushing liquid filtered by the filter screen 5 flows back into the liquid storage tank 204 again for subsequent circulation, and after the specified time of circulation, the circulation of the step is ended and enters the next step; in the second cleaning step, the first selection valve 11 and the closing valve 12 are opened, and the second selection valve 13 is closed, so that the rinse liquid flowing back to the first connection pipe 201 flows to the media filter 203 first and then flows into the separation filter 207 through the first return pipe 202, and the other steps are the same as those in the first cleaning step, and the second cleaning step returns to the normal operation state of the plate heat exchanger 1 after the second cleaning step is completed. The cleaning method is mainly used for cleaning impurities in the plate heat exchanger 1 in the first step and preventing the impurities from being washed into the medium filter 203, and is mainly used for cleaning the impurities in the medium filter 203 in the second step, the impurities in the plate heat exchanger 1 can be automatically and quickly cleaned, the impurities in the medium filter 203 can also be cleaned, the traditional manual cleaning method is replaced, personnel are not needed to participate in operation, the cleaning speed is high, the back washing operation can be more frequently inserted in the working period of the plate heat exchanger 1, the service life of the equipment can be effectively prolonged, the washing liquid in the cleaning process can also be repeatedly recycled, resources are saved, each medium can be respectively cleaned by an independent back washing module 2, the mixing of the media can be prevented, and meanwhile, the corresponding washing liquid can be conveniently selected for different media, the flushing liquid is the same material with the medium of preferred selection, secondly is the material with the medium separation easily, and the impurity that on the other hand was washd out then can be cleared away by the manual work after being collected by separation filter 207, also can not influence plate heat exchanger 1's normal work to separation filter 207's cleaning process, has reduced the occupation to plate heat radiator operating time more, consequently has very high practical value.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (7)

1. The back washing device of the plate heat exchanger is characterized in that: the device comprises a control console (18) and at least two backwashing modules (2) which are arranged near a plate type heat exchanger (1), wherein the plate type heat exchanger (1) is fixedly connected with a corresponding medium inlet pipe (19) and a corresponding medium outlet pipe (20) at positions corresponding to the input and the output of seed removing media;

the backwashing module (2) comprises a first connecting pipe (201), a first return pipe (202), a medium filter (203), a liquid storage tank (204), a second return pipe (205), a second connecting pipe (206) and a separation filter (207), and the medium filter (203) is arranged in the middle of the first connecting pipe (201);

the front end of the first connecting pipe (201) is provided with a second main valve (10) at the position corresponding to the connection with the external medium recovery device, the tail end of the first connecting pipe (201) is connected with the medium inlet pipe (19), the front end of the second connecting pipe (206) is provided with a first main valve (9) at the position corresponding to the connection with the external medium supply device, and the tail end of the second connecting pipe (206) is connected with the medium outlet pipe (20);

the tail end of the first connecting pipe (201) is connected with a second return pipe (205), a second selection valve (13) is installed in the middle of the second return pipe (205), the first connecting pipe (201) is connected with a first return pipe (202) at the middle position corresponding to a second main valve (10) and a medium filter (203), and a first selection valve (11) is installed in the middle of the first return pipe (202);

a sealing seat (6) is fixedly arranged in the middle of the separation filter (207), a filter screen (5) for dividing the interior of the separation filter (207) into an upper part and a lower part is fixedly arranged on the sealing seat (6), the tail ends of the first return pipe (202) and the second return pipe (205) are communicated with the lower part of the inner cavity of the separation filter (207), and the upper part of the inner cavity of the separation filter (207) is communicated with the inner cavity of the liquid storage box (204), a circulating pump (3) communicated with the interior of the liquid storage tank (204) is arranged on the liquid storage tank (204), and the output end of the circulating pump (3) is communicated with the tail end of the second connecting pipe (206), the control console (18) is electrically connected with the first main valve (9), the second main valve (10), the first selection valve (11), the second selection valve (13), the closing valve (12) and the circulating pump (3) through cables.

2. The backwashing device of a plate heat exchanger as claimed in claim 1, wherein: an S7-200 type PLC controller and a display electrically connected with the controller are arranged in the console (18), and rollers are mounted at the bottom of the console (18).

3. The backwashing device of a plate heat exchanger according to claim 1, wherein: the inside second fluid-discharge tube (8) that is used for discharging impurity of intercommunication separation filter (207) is installed to the bottom of separation filter (207), and installs on second fluid-discharge tube (8) second flowing back valve (7) with control cabinet (18) electric connection, the steelframe that is used for the support is installed to the bottom of separation filter (207), and passes through rubber pad or soft plastic pad laminating chucking between filter screen (5) and separation filter (207) inner wall.

4. The backwashing device of a plate heat exchanger as claimed in claim 1, wherein: the inside of the medium filter (203) adopts a metal filter net, a filter bag or a filter membrane for filtering operation, and the medium filter (203) adopts a flange plate to be connected on the first connecting pipe (201).

5. The backwashing device of a plate heat exchanger as claimed in claim 1, wherein: the upper end of the liquid storage box (204) is provided with a box cover (15) through clamping and sealing, and a lifting handle (14) which is convenient for opening the box cover (15) is fixedly arranged on the box cover (15) through a bolt.

6. The backwashing device of a plate heat exchanger as claimed in claim 1, wherein: a liquid supply pump (4) used for supplying flushing liquid to the interior of the liquid storage tank (204) is fixedly mounted on the liquid storage tank (204), and a liquid inlet of the liquid supply pump (4) is connected to external flushing liquid supply equipment.

7. The backwashing device of a plate heat exchanger as claimed in claim 1, wherein: the bottom of liquid reserve tank (204) is connected with first drain pipe (16), and installs first drainage valve (17) that are used for controlling first drain pipe (16) flowing back on first drain pipe (16).

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