Filter system of plate heat exchanger

Abstract

The utility model discloses a plate heat exchanger filtering system which comprises a main pipeline, a parallel pipeline, a communicating pipeline and two backflushing pipelines, and a first tee joint, a first valve, a first filter, a second tee joint, a third tee joint, a fourth tee joint, a one-way valve and a four-way joint are sequentially arranged on the main pipeline from upstream to downstream. A second valve, a fifth tee joint, a second filter, a sixth tee joint and a one-way valve are sequentially arranged on the parallel pipeline from upstream to downstream, and a third valve is arranged on the communicating pipeline; one end of a back-flushing pipeline is connected with the four-way joint, the other end of the back-flushing pipeline is connected with the second three-way joint or the fifth three-way joint, and a peristaltic pressure pump, a back-flushing valve, an impurity filter, a water pump and a one-way valve are sequentially arranged on the back-flushing pipeline; through cooperation of the main pipeline, the parallel pipeline, the communicating pipeline and the backflushing pipeline, alternate backflushing maintenance of the first filter and the second filter can be achieved, water flow entering the downstream plate heat exchanger is not affected in the backflushing maintenance process, and normal heat exchange operation can be guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to filter system field, concretely relates to a plate heat exchanger filter system. BACKGROUND

[0002] Plate heat exchanger is a mature working medium heat exchange equipment, is widely used in energy chemical industry, machining and life heating scene, it is known to all that the working medium flow passage section of plate heat exchanger is small, and the cleanliness degree of working medium is required, otherwise it is easy to cause the blockage of plate heat exchanger, and the current commonly used mode is to simply install filter screen on the import upstream, although it can satisfy the filtration requirement, but when filter screen cleaning and maintenance, the shutdown measure must be taken to plate heat exchanger, influence the normal progress of production and life, here, a kind of plate heat exchanger filter system of maintenance without shutdown is presented. SUMMARY

[0003] In view of the problems in the background art, the utility model aims at providing a plate heat exchanger filter system, which effectively solves the problems in the background art.

[0004] To achieve the above object, the utility model adopts the following technical scheme:

[0005] A plate heat exchanger filter system, including main pipeline, parallel pipeline, communication pipeline and two backflush pipelines, the outlet end of main pipeline is connected with plate heat exchanger and is sequentially provided with first tee, first valve, first filter, second tee, third tee, fourth tee, check valve and four-way valve from upstream to downstream on main pipeline, the two ends of parallel pipeline are connected with first tee and fourth tee respectively and are sequentially provided with second valve, fifth tee, second filter, sixth tee and check valve from upstream to downstream on parallel pipeline, the two ends of communication pipeline are connected with third tee and sixth tee respectively and communication pipeline is provided with third valve; one end of backflush pipeline is connected with four-way valve, the other end is connected with second tee or fifth tee, and is sequentially provided with peristaltic pressure pump, backflush valve, impurity filter, water pump and check valve on backflush pipeline.

[0006] Further, the first filter and the second filter are both filter screens.

[0007] Further, the impurity filter includes a housing, a water replenishment pipe arranged on the housing, and a water outlet pipe and a water inlet pipe connected with the backflush pipeline, one end of the water outlet pipe extends into the housing and has a water inlet, one end of the water inlet pipe extends into the housing and is connected with an annular water distribution pipe, the annular water distribution pipe is coaxially arranged with the housing and has a plurality of tangential water outlet holes uniformly distributed on the inner circle in the circumferential direction, and a valve cover is detachably arranged at the bottom of the housing.

[0008] Further, a vertical filter cartridge is arranged at the water inlet, and the vertical filter cartridge is located at the center of the vertical projection of the shell.

[0009] Further, the valve cover is screwed on the bottom of the shell, and a base is arranged below the outer side of the valve cover, a supporting rod is screwed on the base, a handle is fixed on the supporting rod, and the upper end of the supporting rod is fixedly connected with the valve cover.

[0010] The utility model has the advantages of the following beneficial effects:

[0011] In the utility model, the cooperation of the main pipeline, the parallel pipeline, the communication pipeline and the backflushing pipeline can realize the alternate backflushing maintenance of the first filtration and the second filtration, and the water flow entering the downstream plate heat exchanger is not affected during the backflushing maintenance process, so that normal heat exchange operation can be ensured; in addition, the impurity filter can effectively intercept and remove impurities, and the operation is simple and convenient, and the utility model has strong practicability. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a whole structure schematic view of the embodiment of the utility model;

[0013] Figure 2 It is a structure schematic view of the impurity filter in the embodiment of the utility model. DETAILED DESCRIPTION

[0014] The embodiment of the utility model will be further described in detail in combination with the drawings and the embodiment. The following embodiment is used to illustrate the utility model, but cannot be used to limit the scope of the utility model.

[0015] In the description of the utility model, unless otherwise specified, the meaning of "multiple" is two or more than two; the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and is not indicative or suggestive of the device or element indicated must have a specific orientation, be constructed in a specific orientation and be operated, therefore, cannot be understood as a limitation on the utility model. In the description of the utility model, it is necessary to explain that, unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0016] As Figure 1 And Figure 2As shown, the plate heat exchanger filtering system comprises a main pipeline 1, a parallel pipeline 2, a communication pipeline 3 and two backflush pipelines 4, the outlet end of the main pipeline 1 is connected with a plate heat exchanger 5, and the main pipeline 1 is sequentially provided with a first three-way pipe 6, a first valve 7, a first filter 8, a second three-way pipe 9, a third three-way pipe 10, a fourth three-way pipe 11, a one-way valve and a four-way pipe 12 from upstream to downstream, the two ends of the parallel pipeline 2 are connected with the first three-way pipe 6 and the fourth three-way pipe 11 respectively, and the parallel pipeline 2 is sequentially provided with a second valve 13, a fifth three-way pipe 14, a second filter 15, a sixth three-way pipe 16 and a one-way valve from upstream to downstream, the two ends of the communication pipeline 3 are connected with the third three-way pipe 10 and the sixth three-way pipe 16 respectively, and the communication pipeline 3 is provided with a third valve 17, one end of the backflush pipeline 4 is connected with the four-way pipe 12, the other end is connected with the second three-way pipe 9 or the fifth three-way pipe 14, and the backflush pipeline 4 is sequentially provided with a peristaltic pump, a backflush valve 18, an impurity filter 19, a water pump 20 and a one-way valve.

[0017] The first filter 8 and the second filter 15 are both filter screens, and the specific mesh number is selected according to different processes.

[0018] The impurity filter 19 comprises a shell 21, a water supplement pipe arranged on the shell 21, and a water outlet pipe 22 and a water inlet pipe 23 connected with the backflush pipeline 4, one end of the water outlet pipe 22 extends into the shell 21 and has a water inlet, a vertical filter cylinder 24 is arranged at the water inlet, the vertical filter cylinder 24 is located at the vertical projection center of the shell 21, which is beneficial to the entry of cleaner water flow, one end of the water inlet pipe 23 extends into the shell 21 and is connected with an annular water distribution pipe 25, the annular water distribution pipe 25 is coaxially arranged with the shell 21 and is uniformly provided with a plurality of tangential water outlet holes 26 on the inner ring in the circumferential direction, and the rotation of water flow is caused in the shell 21 when all the tangential water outlet holes 26 jointly discharge water;

[0019] A valve cover 27 is detachably arranged at the bottom of the shell 21, specifically, the valve cover 27 is screwed at the bottom of the shell 21, a base 28 is arranged below the outer side of the valve cover 27, a supporting rod 29 is screwed on the base 28, a handle 30 is fixedly arranged on the supporting rod 29, the upper end of the supporting rod 29 is fixedly connected with the valve cover 27, and when the supporting rod 29 is screwed into the base 28, the valve cover 27 is also screwed out of the shell 21, which is beneficial to the auxiliary support of the valve cover 27 during dismounting.

[0020] The working principle of the embodiment is as follows:

[0021] During daily operation, the second valve 13 on the parallel pipeline 2 and the backflush valve 18 on the two backflush pipelines 4 are closed, and the water flow enters the plate heat exchanger 5 after passing through the first filter 8 on the main pipeline 1;

[0022] After running for a period of time, the first valve 7 on the main pipeline 1 is closed, the second valve 13 on the parallel pipeline 2 is opened, the third valve 17 on the communication pipeline 3 is opened, and the backflush valve 18 on the backflush pipeline 4 connected with the second three-way pipe 9 is opened, the water flow enters the parallel pipeline 2 and is filtered by the second filter 15, part of the filtered water flow enters the plate heat exchanger 5 through the fourth three-way pipe 11 and the four-way pipe 12, and the other part of the filtered water flow backflushes the first filter 8 on the main pipeline 1 and then enters the impurity filter 19 on the backflush pipeline 4, the water flow mixed with impurities rotates in the shell 21, the large-particle impurities tend to be close to the periphery of the shell 21 under the action of centrifugal force, the relatively clean water flow at the center enters the water outlet pipe 22 through the vertical filter cylinder 24 and then returns to the four-way pipe 12 to re-enter the plate filter 5, after backflushing for a period of time, the communication pipeline 3 and the backflush pipeline 4 are closed, and the parallel pipeline 2 is used as the main pipeline 1 for long-term use, and after using for a period of time, the main pipeline 1 is switched to play a role and then the parallel pipeline 2 is flushed for a period of time, which can be used; it should be noted that the impurity filter 19 can be regularly disassembled to clean out the impurities and then maintain the clean water level of the vertical filter cylinder 24 through the water supplement pipe;

[0023] Compared with the prior art, in the embodiment, the cooperation of the main pipeline 1, the parallel pipeline 2, the communication pipeline 3 and the backflush pipeline 4 can realize the alternate backflush maintenance of the first filter 8 and the second filter 15, and the water flow entering the downstream plate heat exchanger 5 is not affected during the backflush maintenance process, so that the normal heat exchange operation can be ensured; in addition, the impurity filter 19 can effectively intercept and clean out the impurities, and the operation is simple and convenient, and the impurity filter 19 has strong practicability.

[0024] The embodiments of the utility model are given for example and description, and are not exhaustive or limit the utility model to the disclosed forms. Many modifications and changes are obvious to those skilled in the art. The embodiments are selected and described to better illustrate the principles and practical application of the utility model, and enable those skilled in the art to understand the utility model so as to design various embodiments with various modifications suitable for specific purposes.

Claims

1. A plate heat exchanger filtration system, characterized in that, The system includes a main pipeline, parallel pipelines, connecting pipelines, and two backflushing pipelines. The outlet end of the main pipeline is connected to a plate heat exchanger, and from upstream to downstream, the main pipeline is equipped with a first tee, a first valve, a first filter, a second tee, a third tee, a fourth tee, a check valve, and a four-way valve. The two ends of the parallel pipeline are connected to the first tee and the fourth tee, respectively, and from upstream to downstream, the parallel pipeline is equipped with a second valve, a fifth tee, a second filter, a sixth tee, and a check valve. The two ends of the connecting pipeline are connected to the third tee and the sixth tee, respectively, and the connecting pipeline is equipped with a third valve. One end of the backflushing pipeline is connected to the four-way valve, and the other end is connected to either the second tee or the fifth tee. The backflushing pipeline is equipped with a peristaltic pressurization pump, a backflushing valve, an impurity filter, a water pump, and a check valve.

2. The plate heat exchanger filtration system according to claim 1, characterized in that, Both the first filter and the second filter are filter screens.

3. A plate heat exchanger filtration system according to claim 1 or 2, characterized in that, The impurity filter includes a housing, a water supply pipe disposed on the housing, and an outlet pipe and an inlet pipe connected to a backwash pipe. One end of the outlet pipe extends into the housing and has an inlet. One end of the inlet pipe extends into the housing and is connected to an annular water distribution pipe. The annular water distribution pipe is coaxially arranged with the housing and has multiple tangential water outlet holes evenly distributed along the circumference of its inner ring. A valve cover is detachably disposed at the bottom of the housing.

4. A plate heat exchanger filtration system according to claim 3, characterized in that, A vertical filter cartridge is installed at the water inlet, and the vertical filter cartridge is located at the vertical projection center of the shell.

5. A plate heat exchanger filtration system according to claim 3, characterized in that, The valve cover is screwed to the bottom of the housing and a base is provided on the lower outer side of the valve cover. A support rod is screwed onto the base. A handle is fixed on the support rod and the upper end of the support rod is fixed to the valve cover. When the support rod is screwed into the base, the valve cover is screwed out from the housing.

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