CN219929719U - Filter circulation switching system - Google Patents

Abstract

The utility model discloses a filter circulation switching system which comprises a first filtering unit, a second filtering unit, a … …, an N-1 filtering unit and an N filtering unit which are connected in parallel between an input main pipe and an output main pipe, wherein N is a positive integer greater than or equal to 3, a front end pressure sensor is arranged on the input main pipe, the filtering unit comprises a front end valve, a filter, a rear end pressure sensor and a rear end valve which are sequentially connected by pipelines, each filter is provided with a bypass pipeline, each bypass pipeline is provided with a bypass valve, the first bypass pipeline is used for communicating the input end of the first filter with the output end of the N filter, the second bypass pipeline is used for communicating the input end of the second filter with the output main pipe, … …, the N bypass pipeline is used for communicating the input end of the N filter with the output main pipe, and a stop valve is arranged at the rear end of the position where each bypass pipeline is communicated with the output main pipe. The system can circularly switch the filter to realize the replacement of the filter bag or the maintenance of the filter bag in the running state of the unit.

Description

Filter circulation switching system

Technical Field

The utility model relates to the technical field of filtering equipment, in particular to a filter circulation switching system.

Background

In the water treatment process such as a water purification process, a sewage treatment process or a landfill leachate treatment process, a reverse osmosis unit is an important common device, in the production process, a reverse osmosis filter is usually combined with other pretreatment devices and post-treatment devices, taking China patent No. 215327474U as a reverse osmosis filter device, and the pretreatment device at the front end of the reverse osmosis filter mainly comprises a first security filter device for filtering large-particle impurities such as sand dust and plastics of a water inlet, and a second security filter device for filtering colloid and chemical substances generated by the reaction of a mixing reactor of the water inlet to remove some ions; the post-treatment equipment at the rear end of the reverse osmosis filter mainly comprises a sterilizing box for ozone or ultraviolet sterilization of the filter effluent. The reverse osmosis filter is used as core equipment of a unit, filter bags or filter elements are required to be maintained and replaced regularly, the reverse osmosis unit in the prior art is mainly used for filtering operation through a single-group series-connected filter, for example, the primary reverse osmosis element and the secondary reverse osmosis element of the scheme are used in series, the filter bags of the single-group series-connected reverse osmosis filter can be gradually blocked along with the increase of the operation time of the reverse osmosis unit, when the pressure difference of the front filter and the back filter is larger than 1bar, the filter bags of the single-group series-connected reverse osmosis filter are seriously blocked, the unit is required to stop producing water and clean, the filter bags are replaced by flushing and stopping, the single-operation time of the unit can be shortened, the water production efficiency of the reverse osmosis unit can be greatly reduced, and the unnecessary energy consumption and the water use amount can be increased. Aiming at the technical defect that the operation of the whole unit needs to be stopped when the filter is maintained in the prior art, a scheme capable of freely maintaining or replacing the filter component in the normal operation state of the unit is necessary to be developed.

Disclosure of Invention

The utility model aims to solve the technical problem of overcoming the defects of the prior art and providing a filter circulation switching system which is convenient for switching filters and can freely replace filter bags of the filters in a unit operation state.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the utility model provides a filter circulation switching system, includes parallelly connected first filter element, second filter element, … …, N-1 filtration unit and N filtration unit between input house steward and output house steward, N is the positive integer of 3 or more, be equipped with front end pressure sensor on the input house steward, the filtration unit is including the front end valve, filter, rear end pressure sensor and the rear end valve that connect gradually with the pipeline, front end pressure sensor is used for measuring the front end pressure of each filter, rear end pressure sensor is used for measuring the rear end pressure of corresponding filter, each filter is equipped with a bypass pipeline, is equipped with the bypass valve on each bypass pipeline, and first bypass pipeline is used for communicating the input of first filter with the output house steward of N filter, and second bypass pipeline is used for communicating the input of second filter with the output house steward, … …, and the N bypass pipeline is used for communicating the input of N filter with the output house steward, and each bypass pipeline is equipped with the stop valve with the rear end of output house steward junction.

The filter circulation switching system preferably further comprises a processor module, wherein the front end valve and the bypass valve both comprise electric valves, the stop valves are electric stop valves, and each electric valve and each electric stop valve are respectively connected with the processor module.

In the above filter circulation switching system, preferably, the front end valve and the bypass valve each further include a manual valve.

In the above filter circulation switching system, preferably, the filter rear end is further provided with a one-way check valve.

In the above filter circulation switching system, preferably, the front-end pressure sensor and the rear-end pressure sensor are both connected with an analog input module, and the analog input module is connected with the processor module.

The filter circulation switching system preferably further comprises an alarm module, wherein the alarm module is connected with the processor module, and when the pressure difference between the water inlet filter and the water outlet filter is abnormal, the processor module sends an instruction to the alarm module, and the alarm module sends an alarm signal.

In the above filter circulation switching system, preferably, the filter is a reverse osmosis filter.

The filter cycle switching system described above, preferably, N is equal to 4.

In the above filter circulation switching system, preferably, the back-end valve is a manual valve.

Compared with the prior art, the utility model has the advantages that:

(1) The filter circulation switching system is composed of a plurality of groups of filter units connected in parallel between an input main pipe and an output main pipe, each filter unit comprises a filter and valves respectively positioned at the front end, the rear end and the bypass of the filter, and the rear ends of the input main pipe and the filters are respectively provided with a pressure sensor. The system can realize series combination of different filters by opening or closing valves at different positions of each filter, when the front end pressure difference and the rear end pressure difference of a first group of series filters are higher than a specific value during operation, the corresponding valves are closed or opened to switch to form a second group of series filters to maintain the operation of the unit, the switched filters can be subjected to maintenance operation, the maintenance is completed and put into the system for use, the requirement of replacing filter bags or maintaining the unit under the continuous operation state is realized by the cyclic switching, the shutdown times of the unit are reduced, the single operation time of the unit is greatly prolonged, the water production efficiency of the unit is improved, the unnecessary energy consumption and the use of reclaimed water are reduced, and the purposes of saving energy and reducing consumption are achieved.

(2) According to the filter circulation switching system, the front end and the bypass valve corresponding to each filter are set as the electric valves, the stop valve at the rear end of the position where each bypass pipeline is communicated with the output main pipe is set as the electric stop valve, then each electric valve and each electric stop valve are respectively connected with the processor module, and the opening and closing of each valve are controlled by the processor module so as to realize automatic serial connection combination and automatic switching of different filters. The utility model improves the water production efficiency of the system through online automatic serial combination and switching of the filters, thereby achieving the purposes of energy conservation and consumption reduction, and being simple and convenient to operate.

Drawings

Fig. 1 is a schematic diagram of a filter circuit switching system in an embodiment of the utility model.

Fig. 2 is a schematic diagram of the electrical control of a portion of a filter in an embodiment of the utility model.

Legend description: 1. an input manifold; 2. an output manifold; 3. a filtering unit; 4. a front end pressure sensor; 51. a first front end valve; 52. a second front end valve; 53. a third front end valve; 54. a fourth front end valve; 61. a first filter; 62. a second filter; 63. a third filter; 64. a fourth filter; 71. a first back-end pressure sensor; 72. a second back-end pressure sensor; 73. a third back-end pressure sensor; 74. a fourth back-end pressure sensor; 8. a rear end valve; 91. a first bypass conduit; 92. a second bypass conduit; 93. a third bypass line; 94. a fourth bypass conduit; 101. a first bypass valve; 102. a second bypass valve; 103. a third bypass valve; 104. a fourth bypass valve; 11. a stop valve; 12. an electric valve; 13. a manual valve; 14. a one-way check valve.

Detailed Description

The utility model is described in further detail below with reference to the drawings and specific examples of the specification.

Some of the terms in the specific embodiments of the present utility model are explained as follows:

the front-end pressure sensor 4 is a filter water inlet front-end pressure sensor and is used for measuring the front-end pressures of the first to fourth filters;

the back-end pressure sensor specifically refers to a first back-end pressure sensor 71, a second back-end pressure sensor 72, a third back-end pressure sensor 73, or a fourth back-end pressure sensor 74 for measuring the back-end pressures of the first to fourth filters, respectively;

the front end valves specifically refer to a first front end valve 51, a second front end valve 52, a third front end valve 53 and a fourth front end valve 54, which are respectively first to fourth filter front end valves for switching the front end water inlet filter;

the bypass ducts specifically refer to a first bypass duct 91, a second bypass duct 92, a third bypass duct 93, and a fourth bypass duct 94, which are bypass ducts corresponding to the first to fourth filters, respectively;

the bypass valves specifically refer to a first bypass valve 101, a second bypass valve 102, a third bypass valve 103 and a fourth bypass valve 104, which are corresponding valves on the bypass pipes of the first to fourth filters, respectively.

Fig. 1 and 2 show a specific embodiment of the filter circulation switching system of the present utility model, which comprises a first filtering unit, a second filtering unit, a third filtering unit and a fourth filtering unit connected in parallel between an input manifold 1 and an output manifold 2, wherein the input manifold 1 is provided with a front end pressure sensor 4, each filtering unit 3 comprises a front end valve, a filter, a rear end pressure sensor and a rear end valve 8 which are sequentially connected by pipelines, the front end pressure sensor 4 is used for measuring the front end pressure of each filter, the rear end pressure sensor is used for measuring the rear end pressure of the corresponding filter, each filter is provided with a bypass pipeline, each bypass pipeline is provided with a bypass valve, a first bypass pipeline 91 is used for connecting the input end of the first filter 61 with the output manifold 64, a second bypass pipeline 92 is used for connecting the input end of the second filter 62 with the output manifold 2, a third bypass pipeline 93 is used for connecting the input end of the third filter 63 with the output manifold 2, and a fourth bypass pipeline 94 is used for connecting the input end of the fourth filter 64 with the output manifold 2, and each bypass pipeline is provided with a stop valve 11.

The filter circulation switching system can realize the series connection of different filters through the front end valve, the rear end valve and the bypass valve corresponding to each filter, the series connection combination of different filters can be circularly switched, the filter bag condition of the filters is judged according to the difference value of the front end pressure of water inlet and the rear end pressure of water outlet of the series connection filters, when the pressure difference exceeds a specific value, a new series connection combination filter is switched and used, and then the filter bag of the switched filter is replaced in time, so that the online replacement of the filter bag is realized, the shutdown operation is not needed, and the operation efficiency of the system is effectively improved.

The operation process of the filter circulation switching system of the embodiment is specifically as follows:

in the initial state, the first filter 61 is used as a front end filter, the second filter 62 is used as a rear end filter to form a first group of serial filters, at this time, the first front end valve 51 and the second bypass valve 102 are opened, the other front end valves are all in a closed state, the stop valve 11 between the first filter 61 and the second filter 62 is closed, the other stop valves 11 are opened, the front end pressure sensor 4 detects the pressure of the front end filter, the second rear end pressure sensor 72 detects the pressure of the rear end filter, whether the system operates normally is judged by monitoring the pressure difference between the front end pressure sensor 4 and the second rear end pressure sensor 72, and when the pressure difference of the first group of serial filters is larger than 1bar, the system is switched to the second group of serial filters to operate. At this time, the second front end valve 52 and the third bypass valve 103 are preferentially opened, then the first front end valve 51 and the second bypass valve 102 are closed, the system uses the second filter 62 as a front end filter, the third filter 63 as a rear end filter, and the front end pressure sensor 4 and the third rear end pressure sensor 73 calculate the front-rear filter differential pressure to monitor the operation state of the second group of filters in series. At this time, the operator can replace the filter bag of the first filter 61, and after the completion, the first filter 61 is restored to normal and put into the system. When the operation pressure difference of the second group of series filters exceeds 1bar, the third filter 63 and the fourth filter 64 are used as the third group of series filters, and when the operation pressure difference of the third group of series filters exceeds 1bar, the fourth filter 64 and the first filter 61 are used as the fourth group of series filters, and the circulation is replaced, so that the circulation switching of the system can be realized. The embodiment only introduces a preferred combination switching sequence, and other combination switching sequences can be adopted by the filter circulation switching system according to actual application requirements.

The system of this embodiment further includes a processor module, the front end valve and the bypass valve both include an electric valve 12, the stop valve 11 is an electric stop valve, and each electric valve 12 and each electric stop valve are respectively connected with the processor module, so as to realize automatic opening or closing of the electric valve 12 and the electric stop valve. The front end valve and the bypass valve corresponding to each filter are set as electric valves 12, the stop valve 11 at the rear end of the communication part of each bypass pipeline and the output main pipe 2 is set as an electric stop valve, each electric valve 12 and each electric stop valve are respectively connected with a processor module, such as a CPU module, and the opening and closing of each valve are controlled by the processor module so as to realize the automatic switching of the filter, so that the operation is convenient and efficient.

In this embodiment, the front end valve and the bypass valve each further comprise a manual valve 13. The front end valve, the rear end valve 8 and the bypass valve corresponding to each filter are simultaneously provided with the electric valve 12 and the manual valve 13, so that electric switching control of the filters can be realized, and manual switching can be performed when needed, such as when automatic switching fails or when a filter bag of a certain filter needs to be replaced, the manual switching can be performed through the manual valve.

In this embodiment, the filter rear end is also provided with a one-way check valve 14 for preventing water backflow.

In this embodiment, the front end pressure sensor 4 and the rear end pressure sensor are both connected with an analog input module (i.e., an AI analog module), and the analog input module is connected with a processor module, so as to realize online real-time monitoring of the front end water inlet pressure and the rear end water outlet pressure of the filter. As shown in fig. 2, fig. 2 shows an electrically self-controlled schematic diagram of a portion of the filters (first filter and second filter) for valve control and pressure detection.

The filter circulation switching system of the embodiment further comprises an alarm module (not shown in the figure), wherein the alarm module is connected with the processor module, and when the pressure difference between the water inlet filter and the water outlet filter exceeds a specific value, the processor module sends an instruction to the alarm module, and the alarm module sends an alarm signal, so that a manufacturer can conveniently grasp the running condition of the system in time.

The filter in this embodiment is a reverse osmosis filter, although the circulation switching system of the present utility model may be used for switching other filters in other embodiments.

The four filter units are used in a switching mode, the four filter units are used in a combined mode to have more switching options, the use requirement is guaranteed, meanwhile, larger space is not occupied, and the reverse osmosis unit is more suitable for reverse osmosis units.

The back end valve 8 of this embodiment is a manual valve.

While the utility model has been described with reference to preferred embodiments, it is not intended to be limiting. Many possible variations and modifications of the disclosed technology can be made by anyone skilled in the art, or equivalent embodiments with equivalent variations can be made, without departing from the scope of the utility model. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present utility model shall fall within the scope of the technical solution of the present utility model.

Claims (8)

1. A filter circulation switching system, characterized by: the filter comprises a first filter unit, a second filter unit, … …, an N-1 filter unit and an N filter unit which are connected in parallel between an input main pipe (1) and an output main pipe (2), wherein N is a positive integer greater than or equal to 3, a front end pressure sensor (4) is arranged on the input main pipe (1), each filter unit (3) comprises a front end valve, a filter, a rear end pressure sensor and a rear end valve (8) which are sequentially connected through pipelines, the front end pressure sensor (4) is used for measuring the front end pressure of each filter, the rear end pressure sensor is used for measuring the rear end pressure of the corresponding filter, each filter is provided with a bypass pipeline, each bypass pipeline is provided with a bypass valve, the input end of the first filter (61) is communicated with the output end of the N filter, the second bypass pipeline (92) is used for communicating the input end of the second filter (62) with the output main pipe (2), and the N bypass pipeline is used for communicating the input end of the N filter with the output main pipe (2), and each bypass pipeline is provided with a stop valve (11) which is communicated with the output main pipe (2).

2. The filter circulation switching system according to claim 1, wherein: the front end valve and the bypass valve both comprise electric valves (12), the stop valve (11) is an electric stop valve, and each electric valve (12) and each electric stop valve are respectively connected with the processor module.

3. The filter cycle switching system of claim 2, wherein: the front end valve and the bypass valve both further comprise a manual valve (13).

4. A filter circulation switching system according to claim 3, wherein: the rear end of each filter is also provided with a one-way check valve (14).

5. The filter cycle switching system of claim 4, wherein: the front-end pressure sensor (4) and the rear-end pressure sensor are both connected with an analog input module, and the analog input module is connected with the processor module.

6. The filter cycle switching system of claim 5, wherein: the water inlet filter and the water outlet filter are connected with the water inlet filter, the water outlet filter is connected with the water inlet filter, the water inlet filter is connected with the water outlet filter, the water inlet filter is connected with.

7. The filter cycle switching system according to any one of claims 1 to 6, wherein: the filter is a reverse osmosis filter.

8. The filter circulation switching system according to claim 7, wherein: n is equal to 4.