CN216137018U - Device for reducing ultrafiltration filtration pressure difference and ultrafiltration equipment - Google Patents
Device for reducing ultrafiltration filtration pressure difference and ultrafiltration equipment Download PDFInfo
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- CN216137018U CN216137018U CN202121727900.8U CN202121727900U CN216137018U CN 216137018 U CN216137018 U CN 216137018U CN 202121727900 U CN202121727900 U CN 202121727900U CN 216137018 U CN216137018 U CN 216137018U
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Abstract
The utility model discloses a device for reducing ultrafiltration filtration pressure difference and ultrafiltration equipment, wherein the device for reducing ultrafiltration filtration pressure difference comprises an ultrafiltration system, a water outlet of the ultrafiltration system is provided with an ultrafiltration filter drain valve; the backwashing system is connected with the ultrafiltration water tank at a water inlet end and connected with the ultrafiltration membrane component at a water outlet end and comprises an ultrafiltration backwashing pump, a backwashing water pipeline, a backwashing total inlet valve, a cleaning water pipeline and a cleaning water inlet valve; and the acid adding system is arranged at the front end of the ultrafiltration filter and comprises an ultrafiltration acid pump, an acid inlet pipeline and an acid inlet valve, and the acid inlet pipeline is connected with the ultrafiltration filter cleaning water pipeline in parallel and then is connected with the ultrafiltration filter. The cleaning is carried out under the condition of not disassembling the ultra-filtration filter net sleeve, the replacement period and the service life of the ultra-filtration filter net sleeve are prolonged, and the working intensity of operation and maintenance personnel is reduced.
Description
Technical Field
The utility model belongs to ultrafiltration equipment, and particularly relates to a device for reducing ultrafiltration differential pressure and ultrafiltration equipment.
Background
The ultrafiltration equipment is an important component in a chemical water supply system and is used for removing most suspended matters, turbidity and partial organic matters in water so as to ensure that the water quality meets the water inlet requirement of a reverse osmosis device.
The ultrafiltration filter is used as a preposed filtering device in an ultrafiltration system and has the function of preventing the surface of the ultrafiltration membrane from being scratched and polluted and blocked due to trace flocculate, residual microorganisms and organic matters in raw ultrafiltration water, so that the healthy operation of the ultrafiltration membrane can be protected.
Usually, an ultrafiltration filter is used as pre-filtration before ultrafiltration water inflow, the filtration mode of the ultrafiltration filter is full-flow filtration, namely dead-end filtration, along with the increase of pollutants on the surface of the filter element, the water permeability of the filter element is reduced, so that the filtration speed cannot reach the designed flow speed or the pressure difference between the front and the back of the filter is too large, the actual operation is generally judged according to the pressure difference between the front and the back of the ultrafiltration filter, when the pressure difference exceeds a certain value, the operation end point is considered (currently, 100KPa is adopted as the end point), then automatic backwashing is carried out, or the backwashing is carried out automatically every 60 minutes, so that the pressure difference is recovered to the initial value of 15 KPa.
In the actual production process, the automatic backwashing of the ultrafiltration filter is not thorough, and the pressure difference cannot be restored to the initial value. After about three months, 80KPa still exists after the ultrafiltration filter is subjected to self-reverse washing, and the water production capacity is influenced. For better filtering effect, the problem that the pressure difference is still high after cleaning can be solved only by frequently replacing the net sleeve of the ultrafiltration filter.
The applicant has found during the production process that the ultrafiltration filters currently in the factory or on the market operate with the following problems:
(1) the dirt of the net sleeve of the ultrafiltration filter is blocked quickly, the pressure difference between the front and the back of the ultrafiltration filter exceeds 100kpa, so that the pressure difference of the filter is increased rapidly, the water inflow of an ultrafiltration system is seriously lower than the designed value, and the ultrafiltration water yield is influenced.
The service cycle of the ultra-filtration filter net sleeve is short, and when the filter element is polluted and blocked, the ultra-filtration filter is required to be stopped to be automatically washed. However, the automatic flushing effect is poor, manual flushing is needed, and time and labor are consumed in manual flushing. The continuous operation of the ultrafiltration main body equipment cannot be ensured due to the high differential pressure of the ultrafiltration filter, and the cleaning and maintenance cost of the unit is high. If the net sleeve of the ultrafiltration filter is replaced, the cost is high, the economic benefit is low, and the ultrafiltration operation cost is increased.
When the automatic washing effect of the ultrafiltration filter is not good, the ultrafiltration filter needs to be manually disassembled and then cleaned, and after cleaning is finished, the net is manually sleeved back into the ultrafiltration filter. The cleaning, dismounting and mounting are troublesome, time-consuming and labor-consuming.
Disclosure of Invention
In view of the above technical problems, the present invention aims to: the device for reducing the ultrafiltration filtration pressure difference and the ultrafiltration equipment are provided, so that the ultrafiltration system can be ensured to continuously and stably operate on the premise of maintaining the designed water yield; the whole operation cost of the ultrafiltration system is reduced, the ultrafiltration filter net cover is cleaned under the condition of not disassembling, the replacement period and the service life of the ultrafiltration filter net cover are prolonged, and the working intensity of operation and maintenance personnel is reduced.
The technical scheme of the utility model is as follows:
one of the objects of the present invention is to provide a device for reducing the pressure difference of ultrafiltration, comprising:
the ultrafiltration system comprises an ultrafiltration membrane component, an ultrafiltration filter arranged at the front end of the ultrafiltration membrane component and an ultrafiltration water tank arranged at the rear end of the ultrafiltration membrane component, wherein an ultrafiltration filter drain valve is arranged at a water outlet of the ultrafiltration filter;
the backwashing system comprises an ultrafiltration backwashing pump, an ultrafiltration backwashing water pipeline connected with the water outlet end of the ultrafiltration backwashing water pipeline, an ultrafiltration backwashing main inlet valve arranged on the ultrafiltration backwashing water pipeline, an ultrafiltration filter cleaning water pipeline connected with the water inlet ends of the ultrafiltration backwashing water pipeline and the ultrafiltration filter, and an ultrafiltration filter cleaning water inlet valve arranged on the ultrafiltration filter cleaning water pipeline;
the acid adding system is arranged at the front end of the ultrafiltration filter and comprises an ultrafiltration acid pump, an acid inlet pipeline connected with the medicine outlet end of the ultrafiltration acid pump and an ultrafiltration filter acid inlet valve arranged on the acid inlet pipeline, and the acid inlet pipeline is connected with the ultrafiltration filter cleaning water pipeline in parallel and then connected with the ultrafiltration filter;
during cleaning, starting the ultrafiltration backwashing pump and the ultrafiltration acid pump, opening an ultrafiltration filter cleaning water inlet valve, an ultrafiltration backwashing total inlet valve and an ultrafiltration filter drain valve, controlling a cleaning liquid entering the ultrafiltration filter to reach a preset concentration, stopping the ultrafiltration backwashing pump and the ultrafiltration acid pump, closing the ultrafiltration filter cleaning water inlet valve, the ultrafiltration backwashing total inlet valve and the ultrafiltration filter drain valve, and statically cleaning for a preset time;
and after the static cleaning is finished, starting the ultrafiltration backwashing pump, and opening a cleaning water inlet valve of the ultrafiltration filter, an ultrafiltration backwashing total inlet valve and a drainage valve of the ultrafiltration filter until the pH value of the outlet water of the ultrafiltration filter is 7-8.
Preferably, the method further comprises the following steps:
an ultrafiltration filter acid washing water pipeline, one end of which is connected with the ultrafiltration filter, and the other end of which is connected with the joint of the acid inlet pipeline and the ultrafiltration filter washing water pipeline;
and the pH sampling point of the acid washing water of the ultrafiltration filter is arranged on the acid washing water pipeline of the ultrafiltration filter.
Preferably, the method further comprises the following steps:
the pre-desalting and cleaning system comprises a pre-desalting and cleaning tank, a pre-desalting and cleaning pump arranged at the water outlet end of the pre-desalting and cleaning tank, a pre-desalting and cleaning water inlet pipe connected with the pre-desalting and cleaning pump and the ultrafiltration membrane component, and a pre-desalting and cleaning return pipe connected with the inlet end of the pre-desalting and cleaning tank and the ultrafiltration membrane component;
an ultrafiltration cleaning reflux main valve is arranged on the pre-desalination cleaning reflux pipe, and an ultrafiltration cleaning water inlet valve is arranged on the pre-desalination cleaning water inlet pipe.
Preferably, the method further comprises the following steps:
the ultra-reverse filter is arranged on the ultra-filtration backwashing water pipeline, and two ends of the ultra-reverse filter are respectively communicated with the ultra-filtration backwashing system and the ultra-filtration membrane component;
a water inlet valve of the super-reverse filter is arranged on a pipeline connected between a water inlet of the super-reverse filter and the ultrafiltration backwashing system, a water outlet of the super-reverse filter is connected with the filtering membrane component through the ultrafiltration backwashing water pipeline, and a water outlet valve of the super-reverse filter is arranged on the ultrafiltration backwashing water pipeline.
Preferably, the ultrafiltration backwashing system comprises two groups of ultrafiltration backwashing pumps which are connected in parallel, a water inlet valve of the ultrafiltration backwashing pump is arranged at the upstream of any group of the ultrafiltration backwashing pumps, and a water outlet valve of the ultrafiltration backwashing pump is arranged at the downstream of any group of the ultrafiltration backwashing pumps.
Preferably, the acid addition system further comprises:
the acid tank is connected with the ultrafiltration acid pump through an acid pipe;
and the ultrafiltration acid pump acid inlet main valve is arranged on the acid pipe.
Preferably, the acid adding system comprises two groups of ultrafiltration acid pumps, the two groups of ultrafiltration acid pumps are connected in parallel, an ultrafiltration acid pump acid inlet valve is arranged at the upstream of any one group of ultrafiltration acid pump, and an ultrafiltration acid pump acid outlet valve is arranged at the downstream of the ultrafiltration acid pump.
It is another object of the present invention to provide an ultrafiltration apparatus comprising the device for reducing the pressure difference of ultrafiltration as described in any of the above.
Compared with the prior art, the utility model has the advantages that:
according to the device for reducing the ultrafiltration filtration pressure difference, the acid inlet pipeline and the ultrafiltration filter cleaning water pipeline are additionally arranged and are connected in parallel and then connected with the ultrafiltration filter, and the ultrafiltration filter cleaning water pipeline is communicated with the ultrafiltration water tank, so that the ultrafiltration system can be ensured to continuously and stably operate on the premise of maintaining the designed water yield; the whole operation cost of the ultrafiltration system is reduced, the ultrafiltration filter net cover is cleaned under the condition of not disassembling, the replacement period and the service life of the ultrafiltration filter net cover are prolonged, and the working intensity of operation and maintenance personnel is reduced.
Drawings
The utility model is further described with reference to the following figures and examples:
FIG. 1 is a schematic diagram of an apparatus for reducing the pressure difference of ultrafiltration according to an embodiment of the present invention.
Wherein: 1. an ultrafiltration filter; 10. an acid washing water pipeline of an ultrafiltration filter; 11. a water discharge valve of the ultrafiltration filter; 12. an ultra-filtration filter inlet valve; 13. an outlet valve of the ultrafiltration filter; 14. pH sampling point of acid washing water of an ultrafiltration filter; 2. an ultrafiltration membrane module; 21. an ultrafiltration main water inlet valve; 22. an ultrafiltration water inlet valve; 23. an ultrafiltration drain valve; 3. an ultrafiltration water tank; 31. a backwashing water outlet valve of the ultrafiltration water tank; 32. an outlet valve of the ultrafiltration water tank; 33. a discharge valve of the ultrafiltration water tank; 4. a backwashing system; 40. an ultrafiltration backwashing total inlet valve; 41. an ultrafiltration backwash pump; 42. an intake valve of an ultrafiltration backwashing pump; 43. a water outlet valve of the ultrafiltration backwashing pump; 44. an ultrafiltration backwash water pipeline; 5. a super-reflecting filter; 51. a super-reverse filter inlet valve; 52. a water outlet valve of the super-reverse filter; 6. an acid addition system; 60. an acid inlet valve of an ultrafiltration filter; 61. an ultrafiltration acid pump; 62. an acid inlet valve of the ultrafiltration acid pump; 63. an acid outlet valve of the ultrafiltration acid pump; 64. an acid inlet main valve of the ultrafiltration acid pump; 65. acid tube; 66. an acid inlet pipeline; 7. the ultrafiltration filter cleans the water inlet valve; 70. an ultrafiltration filter is used for cleaning a water pipeline; 8. pre-desalting and cleaning a water inlet pipe; 81. ultra-filtering and cleaning the water inlet valve; 9. pre-desalting and cleaning a reflux pipe; 90. ultra-filtering and cleaning a reflux main valve; 91. and (5) ultra-filtering and cleaning the reflux valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
Example (b):
referring to fig. 1, the device for reducing the ultrafiltration filtration pressure difference of the embodiment of the utility model comprises an ultrafiltration system, a backwashing system 4, an acid adding system 6, a pre-desalting cleaning system and an ultra-reverse filter 5. The ultrafiltration system comprises an ultrafiltration membrane component 2, an ultrafiltration filter 1 arranged at the front end of the ultrafiltration membrane component 2 and an ultrafiltration water tank 3 arranged at the rear end of the ultrafiltration membrane component 2, wherein a water discharge port of the ultrafiltration filter 1 is provided with a water discharge pipe, and an ultrafiltration filter water discharge valve 11 is arranged on the water discharge pipe. The water inlet end of the backwashing system 4 is connected with the ultrafiltration water tank 3, the water outlet end is connected with the ultrafiltration membrane component 2, the backwashing system 4 comprises an ultrafiltration backwashing pump 41, an ultrafiltration backwashing water pipeline 44 connected with the water outlet end of the ultrafiltration backwashing pump 41, an ultrafiltration backwashing main inlet valve arranged on the ultrafiltration backwashing water pipeline, an ultrafiltration filter cleaning water pipeline 70 connected with the ultrafiltration backwashing water pipeline 44 and the water inlet end of the ultrafiltration filter 1, and an ultrafiltration filter cleaning water inlet valve 7 arranged on the ultrafiltration filter cleaning water pipeline 70. The acid adding system 6 is arranged at the front end of the ultrafiltration filter 1 and comprises an ultrafiltration acid pump 61, an acid inlet pipeline 66 connected with the drug outlet end of the ultrafiltration acid pump 61 and an ultrafiltration filter acid inlet valve 60 arranged on the acid inlet pipeline 66, wherein the acid inlet pipeline 66 is connected with an ultrafiltration filter cleaning water pipeline 70 in parallel and then is connected with the ultrafiltration filter 1. And when the pressure difference still exceeds 80Kpa after the ultrafiltration filter is automatically back flushed, performing an ultrafiltration filter cleaning program. During cleaning, the ultrafiltration backwash pump 41 and the ultrafiltration acid pump 61 are started, the ultrafiltration filter cleaning water inlet valve 7, the ultrafiltration backwash total inlet valve and the ultrafiltration filter drain valve 11 are opened, the ultrafiltration backwash pump 41 and the ultrafiltration acid pump 61 are stopped when the cleaning liquid entering the ultrafiltration filter 1 reaches the preset concentration, the ultrafiltration filter cleaning water inlet valve 7, the ultrafiltration backwash total inlet valve and the ultrafiltration filter drain valve 11 are closed, and static cleaning is carried out for the preset time (4 hours in the embodiment). After the static cleaning is finished, the ultrafiltration backwashing pump 41 is started, the ultrafiltration filter cleaning water inlet valve 7, the ultrafiltration backwashing total inlet valve and the ultrafiltration filter drain valve 11 are opened until the pH value of the effluent of the ultrafiltration filter 1 is 7-8, namely the initial pressure difference of the ultrafiltration filter 1 can be restored to the initial value of 15 kpa.
Preferably, as shown in the figure, the ultrafiltration filter acid washing water pipe 10 is connected at one end to the ultrafiltration filter 1 and at the other end to the junction of the acid inlet pipe 66 and the ultrafiltration filter washing water pipe 70. The ultrafiltration filter acid wash water pH sampling point 14 is disposed on the ultrafiltration filter acid wash water conduit 10. Sampling is carried out through an ultrafiltration filter acid washing water pH sampling point 14, so that whether the cleaning liquid entering the ultrafiltration filter 1 reaches the preset concentration or not is judged. The preset concentration of the embodiment is 5%.
Preferably, the pre-desalting cleaning system comprises a pre-desalting cleaning tank, a pre-desalting cleaning pump arranged at the water outlet end of the pre-desalting cleaning tank, a pre-desalting cleaning water inlet pipe 8 connected with the pre-desalting cleaning pump and the ultrafiltration membrane component 2, and a pre-desalting cleaning return pipe 9 connected with the inlet end of the pre-desalting cleaning tank and the ultrafiltration membrane component 2. The pre-desalting cleaning reflux pipe 9 is provided with an ultrafiltration cleaning reflux main valve 90, and the pre-desalting cleaning water inlet pipe 8 is provided with an ultrafiltration cleaning water inlet valve 81.
Preferably, the ultra-reverse filter 5 is arranged on the ultra-filtration backwashing water pipeline 44, and two ends of the ultra-reverse filter 5 are respectively communicated with the ultra-filtration backwashing system 4 and the ultra-filtration membrane assembly 2. A super-reverse filter water inlet valve 51 and a super-reverse filter water inlet valve 51 are arranged on a pipeline connected between the water inlet of the super-reverse filter 5 and the ultrafiltration backwashing system 4, the water outlet of the super-reverse filter 5 is connected with the filtering membrane component through an ultrafiltration backwashing water pipeline 44, and a super-reverse filter water outlet valve 52 is arranged on the ultrafiltration backwashing water pipeline 44. That is, the ultrafiltration backwash outlet valve 52 is positioned upstream of the ultrafiltration backwash main inlet valve.
Preferably, the ultrafiltration backwashing system 4 comprises two groups of ultrafiltration backwashing pumps 41, the two groups of ultrafiltration backwashing pumps 41 are connected in parallel, a water inlet valve 42 of the ultrafiltration backwashing pump is arranged at the upstream of any group of the ultrafiltration backwashing pumps 41, and a water outlet valve 43 of the ultrafiltration backwashing pump is arranged at the downstream of the ultrafiltration backwashing pump.
Preferably, the acid adding system 6 further comprises an acid tank (not shown), the acid tank of the embodiment is disposed at a high position, and is specifically located above the ultrafiltration acid pump 61, and the acid tank is connected with the ultrafiltration acid pump 61 through an acid pipe 65. The ultrafiltration acid pump inlet header valve 64 is disposed on the acid line 65. The acid adding system 6 comprises two groups of ultrafiltration acid pumps 61, the two groups of ultrafiltration acid pumps 61 are connected in parallel, the upstream of any group of ultrafiltration acid pumps 61 is provided with an ultrafiltration acid pump acid inlet valve 62, and the downstream is provided with an ultrafiltration acid pump acid outlet valve 63.
As shown in figure 1, a back washing water outlet valve of the ultrafiltration water tank 3 is arranged on a pipeline connecting the water outlet end of the ultrafiltration water tank 3 with the back washing system 4. The water outlet end of the ultrafiltration water tank 3 is also connected with the reverse osmosis water inlet pump, and a water outlet valve of the ultrafiltration water tank 3 is arranged on a pipeline connected with the reverse osmosis water inlet pump. In addition, the ultrafiltration water tank 3 is also provided with a discharge valve of the ultrafiltration water tank 3.
As shown in fig. 1, an ultrafiltration water inlet pump (not shown) is further disposed at the water inlet end of the ultrafiltration filter 1, a water inlet valve of the ultrafiltration filter 1 is disposed on a pipeline connected between the ultrafiltration water inlet pump and the water inlet end of the ultrafiltration filter 1, a water outlet valve of the ultrafiltration filter 1 is further disposed on a pipeline connected between the water outlet end of the ultrafiltration filter 1 and the ultrafiltration membrane module 2, and a bypass valve of the ultrafiltration filter 1 is further disposed between the water inlet valve of the ultrafiltration filter 1 and the water outlet valve of the ultrafiltration filter 1.
As shown in fig. 1, the ultrafiltration membrane modules 2 comprise two groups, the two groups of ultrafiltration membrane modules 2 are arranged in parallel, an ultrafiltration backwashing water inlet valve is arranged on a pipeline connecting each group of ultrafiltration membrane modules 2 with an ultrafiltration backwashing water pipeline, and an ultrafiltration cleaning reflux valve 91 is arranged on a pipeline connecting each group of ultrafiltration membrane modules 2 with a pre-desalination cleaning reflux pipe 9. Each group of ultrafiltration membrane modules 2 also comprises an upper ultrafiltration drain valve 23 and a lower ultrafiltration drain valve 23. The ultrafiltration system also comprises an ultrafiltration waste discharge main valve. An ultrafiltration water inlet valve 22 is arranged at one end of each group of ultrafiltration membrane components 2 connected with the ultrafiltration filter 1, and an ultrafiltration main water inlet valve 21 is also arranged on a pipeline connected with the water outlet end of the ultrafiltration filter 1 at the upstream of the two ultrafiltration water inlet valves 22. An ultrafiltration cleaning water inlet valve 81 is arranged on a pipeline connecting each group of ultrafiltration membrane components 2 with the pre-desalting cleaning pump. And an ultrafiltration effluent cleaning reflux valve is respectively arranged on the pipeline of each group of ultrafiltration membrane components 2 connected with the pre-desalination cleaning reflux pipe 9.
It should be noted that the valves and the pump in the present embodiment are all conventional structures, and the specific structure and principle are not described and limited in detail herein, and are not the inventive point of the present application. The utility model of the application is characterized in that an acid adding system 6 and an ultrafiltration filter cleaning water pipeline 70 which are connected with an ultrafiltration filter 1 are additionally arranged on the system, the ultrafiltration filter cleaning water pipeline 70 is communicated with an ultrafiltration water tank 3, the ultrafiltration filter cleaning water pipeline 70 is connected with the ultrafiltration filter 1 after being connected with an acid inlet pipeline 66 in parallel, cleaning liquid with proper concentration is obtained by mixing acid liquid and backwash water, and the ultrafiltration filter 1 is cleaned.
The ultrafiltration system has high static cleaning speed and good effect on the ultrafiltration filter net sleeve, avoids the phenomenon that the ultrafiltration system is stopped for a long time due to high pressure difference of the ultrafiltration filter because of manual high-pressure cleaning, and ensures the effective operation of the ultrafiltration filter.
Suppose that the outsourcing cleaning net sleeve is 5300 yuan once, one ultrafiltration needs to be cleaned 4 times a year, and the factory has 9 ultrafiltration systems. According to the price and frequency of cleaning by a chemical cleaning company all year round, if 30% industrial hydrochloric acid is used, for example, 189 yuan per ton, compared with the original treatment method, the device needs about 23 yuan of hydrochloric acid for cleaning the net sleeve once, so that the cleaning cost is greatly reduced, the cost can be saved by 189972 yuan, the material cost and the labor required for cleaning and replacing the net sleeve are greatly reduced, and the operation cost of an ultrafiltration system is reduced.
The embodiment of the utility model also provides ultrafiltration equipment which comprises the device for reducing the ultrafiltration pressure difference.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the utility model and are not to be construed as limiting the utility model. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (8)
1. An apparatus for reducing the pressure differential across ultrafiltration membranes, comprising:
the ultrafiltration system comprises an ultrafiltration membrane component (2), an ultrafiltration filter (1) arranged at the front end of the ultrafiltration membrane component (2) and an ultrafiltration water tank (3) arranged at the rear end of the ultrafiltration membrane component (2), wherein a drainage outlet of the ultrafiltration filter (1) is provided with an ultrafiltration filter drainage valve (11);
the backwashing system (4) is provided with a water inlet end connected with the ultrafiltration water tank (3) and a water outlet end connected with the ultrafiltration membrane component (2), and comprises an ultrafiltration backwashing pump (41), an ultrafiltration backwashing water pipeline (44) connected with the water outlet end of the ultrafiltration backwashing pump (41), an ultrafiltration backwashing total inlet valve (40) arranged on the ultrafiltration backwashing water pipeline (44), an ultrafiltration filter cleaning water pipeline (70) connected with the ultrafiltration backwashing water pipeline (44) and the water inlet end of the ultrafiltration filter (1), and an ultrafiltration filter cleaning water inlet valve (7) arranged on the ultrafiltration filter cleaning water pipeline (70);
the acid adding system (6) is arranged at the front end of the ultrafiltration filter (1) and comprises an ultrafiltration acid pump (61), an acid inlet pipeline (66) connected with the drug outlet end of the ultrafiltration acid pump (61) and an ultrafiltration filter acid inlet valve (60) arranged on the acid inlet pipeline (66), and the acid inlet pipeline (66) is connected with the ultrafiltration filter cleaning water pipeline (70) in parallel and then is connected with the ultrafiltration filter (1);
during cleaning, the ultrafiltration backwashing pump (41) and the ultrafiltration acid pump (61) are started, the ultrafiltration filter cleaning water inlet valve (7), the ultrafiltration backwashing total inlet valve (40) and the ultrafiltration filter drain valve (11) are opened, when the cleaning liquid entering the ultrafiltration filter (1) reaches the preset concentration, the ultrafiltration backwashing pump (41) and the ultrafiltration acid pump (61) are stopped, the ultrafiltration filter cleaning water inlet valve (7), the ultrafiltration backwashing total inlet valve (40) and the ultrafiltration filter drain valve (11) are closed, and static cleaning is carried out for the preset time;
and after the static cleaning is finished, starting the ultrafiltration backwashing pump (41), and opening the ultrafiltration filter cleaning water inlet valve (7), the ultrafiltration backwashing total inlet valve (40) and the ultrafiltration filter drain valve (11) until the pH value of the effluent of the ultrafiltration filter (1) is 7-8.
2. The apparatus for reducing the differential pressure in ultrafiltration membranes according to claim 1, further comprising:
an ultrafiltration filter acid washing water pipeline (10), one end of which is connected with the ultrafiltration filter (1), and the other end of which is connected with the joint of the acid inlet pipeline (66) and the ultrafiltration filter washing water pipeline (70);
and the pH sampling point (14) of the acid washing water of the ultrafiltration filter is arranged on the acid washing water pipeline (10) of the ultrafiltration filter.
3. The apparatus for reducing the differential pressure in ultrafiltration membranes according to claim 1, further comprising:
the pre-desalting and cleaning system comprises a pre-desalting and cleaning tank, a pre-desalting and cleaning pump arranged at the water outlet end of the pre-desalting and cleaning tank, a pre-desalting and cleaning water inlet pipe (8) connected with the pre-desalting and cleaning pump and the ultrafiltration membrane component (2), and a pre-desalting and cleaning return pipe (9) connected with the inlet end of the pre-desalting and cleaning tank and the ultrafiltration membrane component (2);
an ultrafiltration cleaning reflux main valve (90) is arranged on the pre-desalination cleaning reflux pipe (9), and an ultrafiltration cleaning water inlet valve (81) is arranged on the pre-desalination cleaning water inlet pipe (8).
4. The apparatus for reducing the differential pressure in ultrafiltration membranes according to claim 1, further comprising:
the ultra-reverse filter (5) is arranged on the ultra-filtration backwashing water pipeline (44), and two ends of the ultra-reverse filter are respectively communicated with the ultra-filtration backwashing system (4) and the ultra-filtration membrane component (2);
a super-reverse filter water inlet valve (51) is arranged on a pipeline connected between a water inlet of the super-reverse filter (5) and the ultrafiltration backwashing system (4), a water outlet of the super-reverse filter (5) is connected with the ultrafiltration membrane module (2) through the ultrafiltration backwashing water pipeline (44), and a super-reverse filter water outlet valve (52) is arranged on the ultrafiltration backwashing water pipeline (44).
5. The device for reducing the ultrafiltration filtration pressure difference according to claim 1, wherein the ultrafiltration backwashing system (4) comprises two groups of ultrafiltration backwashing pumps (41), the two groups of ultrafiltration backwashing pumps (41) are connected in parallel, and an ultrafiltration backwashing pump water inlet valve (42) is arranged at the upstream of any group of ultrafiltration backwashing pumps (41) and an ultrafiltration backwashing pump water outlet valve (43) is arranged at the downstream of the ultrafiltration backwashing pump.
6. The apparatus for reducing the pressure differential of ultrafiltration filtration according to claim 1, wherein the acid addition system (6) further comprises:
an acid tank connected to the ultrafiltration acid pump (61) via an acid pipe (65);
and the ultrafiltration acid pump inlet main valve (64) is arranged on the acid pipe (65).
7. The device for reducing the ultrafiltration filtration pressure difference according to claim 6, wherein the acid adding system (6) comprises two groups of ultrafiltration acid pumps (61), the two groups of ultrafiltration acid pumps (61) are connected in parallel, an ultrafiltration acid pump acid inlet valve (62) is arranged at the upstream of any group of ultrafiltration acid pumps (61), and an ultrafiltration acid pump acid outlet valve (63) is arranged at the downstream of any group of ultrafiltration acid pumps (61).
8. An ultrafiltration apparatus comprising the device for reducing the pressure difference of ultrafiltration according to any of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121727900.8U CN216137018U (en) | 2021-07-28 | 2021-07-28 | Device for reducing ultrafiltration filtration pressure difference and ultrafiltration equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121727900.8U CN216137018U (en) | 2021-07-28 | 2021-07-28 | Device for reducing ultrafiltration filtration pressure difference and ultrafiltration equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216137018U true CN216137018U (en) | 2022-03-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121727900.8U Active CN216137018U (en) | 2021-07-28 | 2021-07-28 | Device for reducing ultrafiltration filtration pressure difference and ultrafiltration equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216137018U (en) |
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2021
- 2021-07-28 CN CN202121727900.8U patent/CN216137018U/en active Active
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