CN111533324A - Water purification and circulation method for casing film production - Google Patents
Water purification and circulation method for casing film production Download PDFInfo
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- CN111533324A CN111533324A CN202010457091.7A CN202010457091A CN111533324A CN 111533324 A CN111533324 A CN 111533324A CN 202010457091 A CN202010457091 A CN 202010457091A CN 111533324 A CN111533324 A CN 111533324A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 180
- 238000000034 method Methods 0.000 title claims abstract description 42
- 238000000746 purification Methods 0.000 title claims abstract description 26
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 238000001914 filtration Methods 0.000 claims abstract description 116
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 56
- 239000012528 membrane Substances 0.000 claims abstract description 32
- 239000002245 particle Substances 0.000 claims abstract description 27
- 239000008213 purified water Substances 0.000 claims abstract description 12
- 230000001681 protective effect Effects 0.000 claims abstract description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 50
- 238000001816 cooling Methods 0.000 claims description 14
- 229920000742 Cotton Polymers 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
- 239000007921 spray Substances 0.000 claims description 10
- 239000006004 Quartz sand Substances 0.000 claims description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- 230000035699 permeability Effects 0.000 claims description 8
- 230000000151 anti-reflux effect Effects 0.000 claims description 7
- 238000013327 media filtration Methods 0.000 claims description 7
- 229920000728 polyester Polymers 0.000 claims description 7
- 239000011734 sodium Substances 0.000 claims description 6
- 239000011347 resin Substances 0.000 claims description 5
- 229920005989 resin Polymers 0.000 claims description 5
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 4
- 239000007769 metal material Substances 0.000 claims description 4
- 229910052708 sodium Inorganic materials 0.000 claims description 4
- 150000001768 cations Chemical class 0.000 claims description 3
- 229910052755 nonmetal Inorganic materials 0.000 claims description 3
- 239000002702 enteric coating Substances 0.000 claims 1
- 238000009505 enteric coating Methods 0.000 claims 1
- 238000004064 recycling Methods 0.000 claims 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 12
- 239000011575 calcium Substances 0.000 description 12
- 229910001425 magnesium ion Inorganic materials 0.000 description 12
- 238000003860 storage Methods 0.000 description 11
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 10
- 229910001424 calcium ion Inorganic materials 0.000 description 8
- 229910052799 carbon Inorganic materials 0.000 description 8
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 6
- 229910001415 sodium ion Inorganic materials 0.000 description 6
- 235000013580 sausages Nutrition 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 229910052791 calcium Inorganic materials 0.000 description 4
- 229940043430 calcium compound Drugs 0.000 description 4
- 150000002681 magnesium compounds Chemical class 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 3
- 239000003729 cation exchange resin Substances 0.000 description 3
- 238000010096 film blowing Methods 0.000 description 3
- 230000003204 osmotic effect Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 2
- 238000011001 backwashing Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 125000000524 functional group Chemical group 0.000 description 2
- 239000008233 hard water Substances 0.000 description 2
- 239000003456 ion exchange resin Substances 0.000 description 2
- 229920003303 ion-exchange polymer Polymers 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 239000011859 microparticle Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000072 sodium resin Substances 0.000 description 2
- 239000008234 soft water Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000000968 intestinal effect Effects 0.000 description 1
- 235000019690 meat sausages Nutrition 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000088 plastic resin Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
- C02F2001/425—Treatment of water, waste water, or sewage by ion-exchange using cation exchangers
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/32—Nature of the water, waste water, sewage or sludge to be treated from the food or foodstuff industry, e.g. brewery waste waters
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention relates to the technical field of water for casing film production, in particular to a water purification and circulation method for casing film production, which comprises the following steps: the method comprises the following steps: performing primary filtration on raw water to remove large particles in the raw water; step two: protecting and filtering the raw water purified in the first step; step three: performing reverse osmosis filtration on the raw water purified in the step two; step four: the purified water purified in the third step is sent to equipment for use, and the used water is returned to the first step again for purification treatment; the invention adopts the multilevel filtration method of primary filtration, protective filtration and reverse osmosis filtration in sequence to ensure the cleanness of the water for membrane blank production; the raw water is filtered by a multi-level filtering method of primary filtering, protective filtering and reverse osmosis filtering in sequence and then is sent to equipment for use, and the used water is purified by the filtering method again, so that the circulation and the bad use of the raw water are realized, and the water source is saved.
Description
Technical Field
The invention relates to the technical field of water for casing film production, in particular to a water purification and circulation method for casing film production.
Background
With the economic development, the demand of instant food is continuously increased, the sausage yield is increased, and particularly various meat sausages continuously enter the market in large quantities. The requirement of sanitary safety as the casing film which is necessary for producing the sausage is never ignored. On the national level, the hygienic safety standard of raw materials used for sausage casing production has been established (GB-9685-.
It is known that in the production of tubular casing film blowing, no matter the "double bubble method" or "three bubble method" or the ordinary film blowing equipment is adopted, the film blank is cooled by water with moderate temperature to complete the crystallization point of the plastic resin. Whether the used water is clean and safe is often ignored by film blowing manufacturers and sausage production enterprises, and the potential safety hazard of sanitation exists; in addition, the water used for producing the sausage casing is directly discharged after the film blank is cooled, thereby causing the waste of water resources.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a water purification and circulation method for casing membrane production, and in order to achieve the aim, the invention provides the following technical scheme:
a water purification and circulation method for casing film production comprises the following steps:
the method comprises the following steps: performing primary filtration on raw water to remove large particles in the raw water;
step two: protecting and filtering the raw water purified in the first step;
step three: performing reverse osmosis filtration on the raw water purified in the step two;
step four: and (4) delivering the purified water purified in the step three to equipment for use, and returning the used water to the step one again for purification treatment.
Preferably, the primary filtration comprises multi-media filtration and activated carbon filtration.
Preferably, the protective filtration comprises softening filtration and anti-reflux filtration.
Preferably, the multi-medium filtration is performed by adopting a multi-medium filtration tank, a filter material in the multi-medium filtration tank is quartz sand, and the multi-medium filtration is performed by activated carbon filtration.
Preferably, the activated carbon filtration is carried out by adopting an activated carbon filtration tank, the filter material in the activated carbon filtration tank is set to be activated carbon, and the activated carbon is softened and filtered after being filtered.
Preferably, the softening and filtering are carried out by adopting a softening tank, the filter material of the softening tank is sodium type cation resin, the tank body of the softening tank is made of non-metal material, and the anti-backflow filtering is carried out after the softening and filtering.
Preferably, the anti-backflow filtering is performed by using an anti-backflow filter, and a filter element of the anti-backflow filter is a soluble spray cotton filter element capable of intercepting particles larger than 5 microns in raw water.
Preferably, when the pressure difference between the water inlet and the water outlet of the anti-reverse flow filter is greater than or equal to 0.1 MPa, the soluble spray cotton filter element needs to be cleaned or replaced, and reverse osmosis filtration is carried out after the anti-reverse flow filtration.
Preferably, the reverse osmosis filtration is performed by using a reverse osmosis filter, a filtration membrane of the reverse osmosis filter is a reverse osmosis membrane having high selective permeability, and the raw water is pressurized by a high pressure pump before entering the reverse osmosis filter.
Preferably, the devices adopted in the first step to the fourth step are connected through a pipeline, the pipeline comprises a PR plastic pipe and a polyester hose, the PR plastic pipe is used for water delivery, and the polyester hose is used for soft connection.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention adopts the multi-level filtration method of primary filtration, protective filtration and reverse osmosis filtration in sequence to ensure the cleanness of the water for membrane blank production.
2. The raw water is filtered by a multi-level filtering method of primary filtering, protective filtering and reverse osmosis filtering in sequence and then is sent to equipment for use, and the used water is purified by the filtering method again, so that the circulation and the bad use of the raw water are realized, and the water source is saved.
Drawings
FIG. 1 is a schematic diagram of a water purification cycle method for casing film production.
In the drawings: 1 multi-medium filter tank, 2 active carbon filter tank, 3 softening tank, 4 anti-backflow filter, 5 high pressure pump, 6 reverse osmosis filter, 7 raw water storage tank, 8 purified water storage tank, 9 film blank cooling equipment, 10 water supply pump I, 10-1 water pump II.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described 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 of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, a preferred embodiment of the present invention provides a water purification and circulation method for casing film production, comprising the following steps:
the method comprises the following steps: the raw water is primarily filtered, and a multi-medium filtering mode is adopted in the step, so that large particles in the raw water are removed firstly, and small particles or micro-particle substances are filtered.
Step two: protecting and filtering the raw water purified in the first step; the aim of the step is to reduce the content of soluble calcium and magnesium compounds in raw water and intercept particles larger than 5 microns in the raw water; because each step needs to be carried out by adopting various purification devices, the content of soluble calcium and magnesium compounds in raw water is reduced, and the scaling of various purification devices can be avoided; the purpose of intercepting particles larger than 5 microns in raw water is to avoid the failure of filtration caused by the reverse osmosis device with high selective permeability used in the step three for puncturing the particles larger than 5 microns in the raw water.
Step three: performing reverse osmosis filtration on the raw water purified in the step two; the step adopts a reverse osmosis membrane with high selective permeability, and utilizes the principle of reverse osmosis to remove various organic matters, particles and inorganic salts in water so as to realize high purification of raw water.
Step four: purified water purified in the third step is sent to the water purifier for use, and the used water is returned to the first step again for purification treatment; raw water is filtered by a multi-level filtering method of primary filtering, protective filtering and reverse osmosis filtering in sequence and then is sent to the membrane blank cooling equipment 9 for use, and the used water is purified by the filtering method again, so that the circulation and the badness of the raw water are realized, and a water source is saved;
compared with the prior art, the invention adopts the multilevel filtering method of primary filtering, protective filtering and reverse osmosis filtering to the raw water in sequence, thereby ensuring the cleanness of the water for membrane blank production, and in addition, the used water is purified by the filtering method again, thereby realizing the bad use of the raw water and saving the water source.
The primary filtration comprises multi-media filtration and activated carbon filtration.
The protective filtration comprises softening filtration and anti-backflow filtration.
The multi-medium filtration is carried out by adopting a multi-medium filtration tank 1, and filter materials in the multi-medium filtration tank 1 are quartz sand; when the quartz sand is used for filtering, a water pump I10 pumps raw water into the multi-medium filter tank 1, the raw water penetrates through the quartz sand under the action of pressure difference, and large solid particles in the raw water are intercepted by the quartz sand, so that the separation of the raw water and the large solid particles is realized;
and filtering the multi-medium by using activated carbon.
The active carbon filtration adopts active carbon filter tank 2 to go on, the filter material that active carbon filter tank 2 was interior sets up to active carbon, and the inside of active carbon has a lot of holes, the fine material of adsorbable raw water.
And filtering the activated carbon, and then softening and filtering.
The softening and filtering are carried out by adopting a softening tank 3, the filter material of the softening tank 3 is sodium type cation resin, and raw water passes through the sodium type cation exchange resin to ensure that the hardness component Ca2 in the water+、Mg2+With Na in the resin+Exchange phase to adsorb Ca2 in water+、Mg2+The water is softened, for example, by using RNA to represent the sodium resin, and the exchange process is as follows:
2RNa+Ca2+＝R2Ca+2Na+
2RNa+Mg2+＝R2Mg+2Na+
i.e. Ca in the water after the water passes through the sodium ion exchanger+、Mg+Is replaced by Na+When the content of calcium and magnesium ions in water is high, the ion exchange resin can release sodium ions, and functional groups are combined with the calcium and magnesium ions, so that the content of the calcium and magnesium ions in the water is reduced, the hardness of the water is reduced, and hard water is changed into soft water;
the softening tank 3 is made of non-metal material, so that the sodium cation exchange resin and the metal material are prevented from other chemical reactions, and the exchange process is in a stable exchange environment.
And carrying out anti-backflow filtration after the softening filtration.
The anti-reflux filtration is carried out by adopting an anti-reflux filter 4, and a filter element of the anti-reflux filter 4 adopts a soluble spray cotton filter element capable of intercepting particles larger than 5 microns in raw water; particles of 5 microns in size entering the reverse osmosis filter through the high pressure pump may break down the reverse osmosis membrane module in the reverse osmosis filter, resulting in the possibility of filtration failure.
When the pressure difference between the water inlet and the water outlet of the anti-reverse flow filter 4 is greater than or equal to 0.1 MPa, the soluble spray cotton filter element needs to be cleaned or replaced; when the soluble spray cotton filter element is blocked, the pressure difference between the water inlet and the water outlet of the anti-backflow filter 4 is increased, and the step is to filter extremely fine particles, so the soluble spray cotton filter element needs to be replaced or cleaned when the pressure difference is greater than or equal to 0.1 MPa, and the permeability of the soluble spray cotton filter element is ensured.
And reverse osmosis filtration is carried out after the anti-backflow filtration.
The reverse osmosis filtration is carried out by adopting a reverse osmosis filter 6, a filter membrane of the reverse osmosis filter 6 is a reverse osmosis membrane with high selective permeability, and raw water is pressurized by a high-pressure pump 5 before entering the reverse osmosis filter 6; the filtration mode utilizes the 'reverse osmosis principle' to pressurize raw water before entering a reverse osmosis filter 6 by using a high-pressure pump 5, when the pressure generated by the pressurization of the high-pressure pump 5 is higher than the osmotic pressure of the raw water on a reverse osmosis membrane, the raw water is subjected to various organic matters, particles and inorganic salts in the water, the water passes through the reverse osmosis membrane and then enters a purified water storage tank 8, and the purified water in the purified water storage tank is supplied to a membrane blank cooling device 9 for use of cooling a casing membrane blank;
raw water generated after being used by the film blank cooling equipment 9 enters the raw water storage tank 7 through the water suction pump II 10-1, and the water supply pump I10 pumps water from the raw water storage tank 7 and continues to enter the multi-medium filter tank 1 for circulating filtration; the water inlet and outlet of the raw water storage tank 7 are provided with filter screens, the filter screens are larger than or equal to 50 meshes, and the residual intestinal blank fragments and large impurities in water are filtered.
The devices adopted in the first step to the fourth step are connected through a pipeline, the pipeline comprises a PR plastic pipe and a polyester hose, the PR plastic pipe is used for conveying water, and the polyester hose is used for carrying out flexible connection; when raw water is filtered by the activated carbon filter tank 2, the adsorption process is a process of adsorbing pollutant molecules onto the surface of a solid, and the free energy of the molecules can be reduced, so that the adsorption process is an exothermic process, and the used pipes need to be PR plastic pipes in the current market in order to prevent scaling caused by high temperature or secondary pollution caused by using metal pipes; a polyester hose was used for the soft joint.
Considering that the devices used in the steps one to four need to be cleaned after being used for a long time, the reverse cleaning of each device is realized through the control of the fully automatic controller in the embodiment;
the multi-medium filter tank 1 and the activated carbon filter tank 2 are controlled by a time relay to reach the set running time, and the time relay controls the back washing pumps in the multi-medium filter tank 1 and the activated carbon filter tank 2 to automatically carry out back washing;
the automatic controller of the reverse osmosis filter comprises: the high-pressure pump and the flushing electromagnetic valve are started and stopped in sequence; when the pure water supply for the film blank cooling equipment 9 is stopped, the reverse osmosis device automatically carries out low-pressure flushing (the pressure is lower than the osmotic pressure); so as to prevent the dirt generated on the surface of the reverse osmosis membrane in operation from depositing on the surface of the membrane.
The working principle is as follows:
the method comprises the following steps: the raw water is primarily filtered, and the purpose of the step is to firstly remove large particles in the raw water and then filter small particles or micro-particle substances.
Step two: protecting and filtering the raw water purified in the first step; the aim of the step is to reduce the content of soluble calcium and magnesium compounds in raw water and intercept particles larger than 5 microns in the raw water; because each step needs to be carried out by adopting various purification devices, the content of soluble calcium and magnesium compounds in raw water is reduced, and the scaling of various purification devices can be avoided; the purpose of intercepting particles larger than 5 microns in raw water is to avoid the failure of filtration caused by the reverse osmosis device with high selective permeability used in the step three for puncturing the particles larger than 5 microns in the raw water.
Step three: performing reverse osmosis filtration on the raw water purified in the step two; the step adopts a reverse osmosis membrane with high selective permeability, and utilizes the principle of reverse osmosis to remove various organic matters, particles and inorganic salts in water so as to realize high purification of raw water.
Step four: the purified water purified in the third step is sent to the film blank cooling equipment 9 for use, and the used water is returned to the first step again for purification treatment; the raw water is filtered by a multi-level filtering method of primary filtering, protective filtering and reverse osmosis filtering in sequence and then is sent to the membrane blank cooling equipment 9 for use, and the used water is purified by the filtering method again, so that the circulation and the bad use of the raw water are realized, and the water source is saved.
Sequentially carrying out the first step to the fourth step by adopting different filtering devices;
firstly, a water pump I10 pumps raw water into a multi-medium filter tank 1, the raw water penetrates through quartz sand under the action of pressure difference, and large solid particles in the raw water are intercepted by the quartz sand, so that the separation of the raw water and the large solid particles is realized; then raw water enters an active carbon filter tank 2 from a multimedia filter tank 1, and a plurality of pores are formed in the active carbon and can adsorb fine substances in the raw water;
secondly, raw water enters the softening tank 3 from the activated carbon filter tank 2 and passes through the sodium cation exchange resin to enable the hardness component Ca2 in the water+、Mg2+With Na in the resin+Exchange phase to adsorb Ca2 in water+、Mg2+The water is softened, for example, by using RNA to represent the sodium resin, and the exchange process is as follows:
2RNa+Ca2+＝R2Ca+2Na+
2RNa+Mg2+＝R2Mg+2Na+
i.e. Ca in the water after the water passes through the sodium ion exchanger+、Mg+Is replaced by Na+When the content of calcium and magnesium ions in water is high, the ion exchange resin can release sodium ions, and functional groups are combined with the calcium and magnesium ions, so that the content of the calcium and magnesium ions in the water is reduced, the hardness of the water is reduced, and hard water is changed into soft water; then raw water enters the anti-backflow filter 4 from the softening tank 3, and a filter element of the anti-backflow filter 4 is a soluble spray cotton filter element capable of intercepting particles larger than 5 microns in the raw water; particles with the size of 5 microns enter the reverse osmosis filter through the high-pressure pump, and can break down a reverse osmosis membrane component in the reverse osmosis filter to cause the possibility of filtration failure;
thirdly, raw water enters the reverse osmosis filter 6 from the anti-backflow filter 4, the filtration mode utilizes a reverse osmosis principle to pressurize the raw water before entering the reverse osmosis filter 6 by using the high-pressure pump 5, when the pressure generated by the pressurization of the high-pressure pump 5 is higher than the osmotic pressure of the raw water on the reverse osmosis membrane, various organic matters, particles and inorganic salts in the raw water are removed, and the raw water is supplied to a membrane blank cooling device 9 through the reverse osmosis membrane for use of membrane blank cooling;
fourthly, raw water enters a purified water storage tank 8 from the reverse osmosis filter 6, and the purified water in the purified water storage tank is supplied to a film blank cooling device 9 for cooling the casing blank;
raw water generated after the film blank cooling equipment 9 is used enters the raw water storage tank 7 through the water suction pump II 10-1, and the water supply pump I10 pumps water from the raw water storage tank 7 and continues to enter the multi-medium filter tank 1 for circulating filtration.
The above description is intended to describe in detail the preferred embodiments of the present invention, but the embodiments are not intended to limit the scope of the claims of the present invention, and all equivalent changes and modifications made within the technical spirit of the present invention should fall within the scope of the claims of the present invention.
Claims (10)
1. A water purification and circulation method for casing film production is characterized by comprising the following steps:
the method comprises the following steps: performing primary filtration on raw water to remove large particles in the raw water;
step two: protecting and filtering the raw water purified in the first step;
step three: performing reverse osmosis filtration on the raw water purified in the step two;
step four: and (4) delivering the purified water purified in the step three to film blank cooling equipment (9) for use, and returning the used water to the step one again for purification treatment.
2. The purification and circulation method for water used in casing membrane production according to claim 1, wherein the primary filtration comprises multi-media filtration and activated carbon filtration.
3. The method for purifying and circulating water for casing membrane production according to claim 2, wherein the protective filtration comprises softening filtration and anti-backflow filtration.
4. The water purification and circulation method for casing membrane production according to claim 2, characterized in that the multi-media filtration is performed by using a multi-media filtration tank (1), the filter material in the multi-media filtration tank (1) is quartz sand, and the multi-media filtration is followed by activated carbon filtration.
5. The water purification and circulation method for casing membrane production according to claim 2, characterized in that the activated carbon filtration is performed by using an activated carbon filtration tank (2), the filter material in the activated carbon filtration tank (2) is set to be activated carbon, and the activated carbon filtration is followed by softening filtration.
6. The method for purifying and circulating water for producing the casing film according to claim 3, wherein the softening filtration is performed by using a softening tank (3), a filter material of the softening tank (3) is made of sodium type cation resin, a tank body of the softening tank (3) is made of a non-metal material, and the softening filtration is followed by anti-backflow filtration.
7. The purification and circulation method for the water for the production of the enteric coating film according to claim 3, wherein the anti-reflux filtration is performed by using an anti-reflux filter (4), and a filter element of the anti-reflux filter (4) is a soluble spray cotton filter element capable of intercepting particles larger than 5 microns in raw water.
8. The purification and circulation method for water for casing membrane production according to claim 7, wherein when the pressure difference between the water inlet and the water outlet of the anti-reverse flow filter (4) is greater than or equal to 0.1 MPa, the soluble spray cotton filter element needs to be cleaned or replaced, and reverse osmosis filtration is performed after the anti-reverse flow filtration.
9. The purification and circulation method for water used in casing membrane production according to claim 1, wherein the reverse osmosis filtration is performed using a reverse osmosis filter (6), a filtration membrane of the reverse osmosis filter (6) is a reverse osmosis membrane having a high selective permeability, and raw water is pressurized by a high pressure pump (5) before entering the reverse osmosis filter (6).
10. The method for purifying and recycling water for producing an enteric film according to claim 1, wherein the devices used in the first to fourth steps are connected through a pipe, and the pipe comprises a PR plastic pipe and a polyester hose, the PR plastic pipe is used for water transportation, and the polyester hose is used for flexible connection.
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| CN202010457091.7A CN111533324A (en) | 2020-05-26 | 2020-05-26 | Water purification and circulation method for casing film production |
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| CN202010457091.7A CN111533324A (en) | 2020-05-26 | 2020-05-26 | Water purification and circulation method for casing film production |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113968632A (en) * | 2021-09-29 | 2022-01-25 | 北京交通大学 | Water purifying bag |
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| CN102190393A (en) * | 2010-03-12 | 2011-09-21 | 上海瑞勇实业有限公司 | Purified water production process with high recovery rate |
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