CN101934196A - Plate type ultra-filtration membrane separation device for chemical-mechanical pulp making waste liquid concentration - Google Patents
Plate type ultra-filtration membrane separation device for chemical-mechanical pulp making waste liquid concentration Download PDFInfo
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- CN101934196A CN101934196A CN 200910088247 CN200910088247A CN101934196A CN 101934196 A CN101934196 A CN 101934196A CN 200910088247 CN200910088247 CN 200910088247 CN 200910088247 A CN200910088247 A CN 200910088247A CN 101934196 A CN101934196 A CN 101934196A
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Abstract
The invention discloses a plate type ultra-filtration membrane separation device suitable for chemical-mechanical pulp making waste liquid concentration. The device comprises a plate type ultra-filtration membrane assembly, a raw liquid storage tank, a circulating liquid storage tank, a permeation liquid storage tank, a temperature control system, a liquid level sensor control system, a liquid membrane pressure pump, a pressure gauge, a flow meter, a plurality of adjusting valves and pipelines. The device is characterized in that: the raw liquid storage tank (1) is connected with the circulating liquid storage tank (2), the liquid membrane pressure pump (P1), the flow meter (FE1), the plate type ultra-filtration membrane assembly (6), the adjusting valves (V6), the permeation liquid storage tank (7) and a concentrated liquid storage tank (5) in turn through the pipelines; and the liquid level sensor control system (4) and the temperature control system (3) are arranged in the circulating liquid storage tank (2). The device has the advantages of low energy consumption, pollution resistance, stable operation and simple operation, and can pre-concentrate the chemical-mechanical pulp making waste liquid with low solid content and greatly reduce the steam consumption of an evaporation concentration process. Meanwhile, the device can promote water saving and pollutant reduction in the chemical-mechanical pulp making process.
Description
Affiliated technical field
The invention belongs to board-like film separation, enrichment facility, the plate-type hyperfiltration membrane separation device that particularly a kind of being used to machine pulp-making effluent concentrates.
Background technology
The slurrying of timber machine slurry has CTMP, BCTMP, kinds of processes such as APMP, at present, the most representative have a CTMP, APMP etc., compare with NBSK, though CTMP and APMP quality are more relatively poor, but can more effectively utilize fibrous raw material, ton slurry consumption of raw materials amount has only about 1/2 of NBSK, ton slurry water consumption only 1/10, the atmosphere pollution of the ordorless grade of production process, the expense that identical scale is newly founded the factory is about half of kraft pulp mills, and the quality of CTMP is slightly inferior to chemical pulp, the whiteness of BCTMP can approach chemical wood pulp, can substitute quite a few chemical wood pulp and produce paper and cardboard.Pulp yield when its major advantage is slurrying reaches about 90%, is about 2 times of chemical wood pulp yield, and it is about about 50% that slurry per ton can be saved fibrous raw material, thus cheap, use wider.Based on above-mentioned advantage, chemical-mechanical pulping keeps higher growth rate for many years always.Its output accounts for high specific weight in China's paper pulp total amount at present.
Although having significantly with respect to chemical pulping pollutant generating capacity, reduces the pollutant generating capacity of chemical-mechanical pulping, because water consumption is less relatively, therefore, the COD and the BOD of its draining are dense, wherein contain a large amount of carbohydrate, lignin, extract and inorganic matter etc., inorganic matter comprises the sulphur that exists with in sulphite or the chelating agent (EDTA, DTPA).Undressed waste water has very strong toxicity to the microorganism in the water body, brings certain degree of difficulty to biological wastewater treatment.
In order further to reduce pollutant emission, countries in the world are all in the technology of researching and developing water seal circulation of pulping and paper-making factory or zero-emission.In order to realize water seal circulation or zero-emission, except that strengthening traditional wastewater processing technology, again various minimizing technology have been carried out big quantity research in recent years, researcher is being sought technically and the technology of all feasible economically realization zero-emission.They successively put into practice technologies such as freezing and crystallizing, combustion by evaporations, the operation of combustion by evaporation technology industrialization at present.Although but the combustion by evaporation technology is a chemical-mechanical pulping Zero discharge selecting technology, but its investment is higher, the investment of evaporation and concentration afterburner combustion system accounts for the 15-18% of this factory's gross investment, and adopts two sections activated sludge processes and third level clarifying treatment, and its investment is the 5-6% of full factory.Operating cost is equally also higher, at present also in perfecting process.
Directly adopt the traditional alkali recovery process that burns after the evaporation and concentration, change machine pulp-making effluent will be through evaporation section general water evaporates wherein, and being brought up to from 1-2%, its solid content send combustion furnace to burn more than 50%, in this process, the water yield that waste liquid per ton evaporates reaches more than 0.96 ton, consume a large amount of steam, the steam that is produced in the combustion process in later stage is far below steam that early stage, evaporation section was consumed.
Ultrafiltration is as a kind of novel separation concentration technique; has no phase transformation; equipment is simple; floor space is little; small investment and low power consumption and other advantages; solid content in its energy effectively catching liquid; and water and a small amount of lower-molecular substance are passed through; it is in pharmacy; be used widely in the isolation and purification of active principle in the industries such as sugaring; current also have the researcher to use it in the water treatment; mainly be the research that is used for the decolouring aspect of waste water; but yet there are no report changing the related application research of machine pulp-making effluent aspect concentrating; along with the execution that the attention of environmental protection is reached stricter discharge standard; the development trend of being of the minimizing machine pulp-making effluent pollution control of waste liquid; waste liquid burns after concentrating and reclaims heat energy and chemicals is a kind of main approach, and ultrafiltration then may become an important energy saving unit in this kind waste liquid concentration process.
Summary of the invention
Not thorough in order to overcome the biochemical treatment of traditionalization machine pulp-making effluent, displacement is big, can not effectively utilize medicine in the waste liquid and organic matter, be difficult to reach the present situation of discharge standard, and novel process technology---huge energy consumption problem in the combustion by evaporation technology, the purpose of this invention is to provide the low energy consumption that a kind of being applicable to machine pulp waste concentrates, resistant to pollution separation concentrates scheme, change machine pulp-making effluent to low-solid content carries out pre-concentration, its concentration is brought up to more than 5% from 1-2%, make that the moisture of 60-80% is separated in the waste liquid, thereby significantly reduce evaporating concentration process steam consumption in the novel process technology.
For achieving the above object, solution of the present invention is: the plate-type hyperfiltration membrane separation device that a kind of being applicable to machine pulp-making effluent concentrates, comprise plate-type hyperfiltration membrane assembly 6, stoste storage tank 1, circulation fluid storage tank 2, see through liquid storage tank 7, temperature control system 3, liquid level sensor control system 4, liquid film compression pump P1, Pressure gauge, flowmeter FE1, FE2, a plurality of control valve V1, V2, V3, V4, V5, V6, V7, V8, V9, V10 and pipeline, it is characterized in that: described stoste storage tank 1 by pipeline successively with circulation fluid storage tank 2, liquid film compression pump P1, flowmeter FE1, plate-type hyperfiltration membrane assembly 6, pressure regulator valve V6, seeing through liquid storage tank 7 and concentrate storage tank 5 links, described plate-type hyperfiltration membrane assembly 6 concentrated solution outlets and pressure regulator valve V6 series circulation are got back to circulation fluid storage tank 2, seeing through the liquid outlet and seeing through flow quantity meter FE2 and be connected by pipeline through liquid storage tank 7 of described membrane module 6 is provided with liquid level sensor control system 4 and temperature control system 3 in the described circulation fluid storage tank 2.
Be provided with level sensing control system 4 in the circulation fluid storage tank 2, this level sensing control system can be controlled the cocnentration factor (concentrate what doubly) of liquid, and the switch by controlling serial motor-driven valve V2, V3, V4 and the start-stop of liquid film compression pump P1 come concentrating of property performance period.Process stabilizing, simple to operate.
Encapsulant was formed around plate-type hyperfiltration membrane assembly 6 was mainly reached by stainless steel baffling channel frame (see figure 2), stainless (steel) wire sintered plate supporting surface, the board-like membrane cisterna support panel shell (see figure 3) of band permeate passageway, ultrafiltration diaphragm; Whole membrane module structure is that the center is symmetrically distributed with baffling channel frame (Fig. 2), and baffling channel frame both sides outwards are the board-like membrane cisterna support panel shell (Fig. 3) of ultrafiltration matrix, stainless (steel) wire sintered plate supporting surface and band permeate passageway successively.
Ultrafiltration diaphragm in the plate-type hyperfiltration membrane assembly can be selected and change, and according to concrete instructions for use, range of choice relates to unlike material, and the film in different apertures can in time be changed after diaphragm reaches service life.
The baffling channel design of plate-type hyperfiltration membrane assembly 6 inside is seen Fig. 2, and the shutdown wash number of plate-type hyperfiltration membrane separation device is reduced, and what do only is the high speed circulation that keeps concentrate, realizes the auto purification of face under the high speed souring.
Film separation unit can on-line cleaning or is taken cleaning apart, cleaning can be adopted Chemical cleaning, during cleaning, stoste storage tank 1 is as the chemical cleaning solution storage tank, cleaning process is consistent with the waste liquid lock out operation, be band and press the high speed wash cycles, clean back liquid and pass through the hand-operated valve V10 of concentrate storage tank leakage fluid dram and see through liquid leakage fluid dram hand-operated valve V1 control discharging.
Adopt above-mentioned milipore filter separator, under the temperature of setting, carry out concentrating and separating, and control cocnentration factor by initial liquid level of stoste and striking point liquid level in the setting circulation fluid storage tank, easy to operate simple and direct, the automatic control level height, regulate flexibly, can regulate setting at any time according to the character and the user's request of pulping waste liquor; Equipment volume is little, expense is lower, and the efficient height is applied widely, can be used for separating, concentrates, technology such as clarification, can open up the application of membrane separation technique in China's pulp and paper industry.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is an enforcement schematic diagram of the present invention, wherein: 1. the stoste storage tank, 2. the circulation fluid storage tank, 3. temperature control system, 4. liquid level sensor system, 5. the concentrate storage tank, 6. plate-type hyperfiltration membrane assembly, 7. see through the liquid storage tank
V2, V3, V4 are motor-driven valve; V1, V5, V6, V7, V8, V9, V10 are hand-operated valve; P1 is the liquid film compression pump.
Fig. 2 is a stainless steel baffling channel frame structure in the membrane module, and frame perimeter is provided with 16 screw holes that are used for fixing.Center-aisle framework projection can well link closely with the plate-type hyperfiltration membrane cisterna support panel shell (Fig. 3) of being with permeate passageway, and the plate side is provided with inlet and liquid outlet, and stoste enters from inlet, and tortuous flowing finally arrives liquid outlet in baffle passageway.
Fig. 3 is the plate-type hyperfiltration membrane cisterna support panel shell of band permeate passageway, and the membrane module both sides are respectively by two shells shown in Figure 3, and periphery is equipped with the screw hole that is used for fixing, and is consistent with the screw hole on the stainless steel baffling channel frame.Middle integral body is the concave surface (see figure 3), interlocks with the convex surface (see figure 2) of stainless steel baffling channel frame, is provided with the back-up block that several are given prominence on the monoblock concave surface of centre again, is used to support stainless (steel) wire sintered plate supporting surface, simultaneously, and for penetrating fluid provides passage.The sheet frame limit is provided with a penetrating fluid outlet (see figure 3).
The specific embodiment:
Change machine pulp-making effluent is stored in the stoste storage tank 1, after the open system, motor-driven valve V4 opens, waste liquid in the stoste storage tank enters in the circulation fluid storage tank 2 through bottom 100 purpose safety filtering nets, after liquid level reaches the setting initial value, motor-driven valve V4 closes automatically, and temperature control system 3 is opened, after waste liquid temperature reaches design temperature, motor-driven valve V3 and liquid film compression pump P1 open, concentrate beginning, flowing through through liquid enters through liquid storage tank 7 through the flow quantity meter, and concentrate is circulated back to circulation fluid storage tank 2 through pressure regulator valve V6, along with constantly carrying out of concentrating, liquid level reaches when setting the striking point liquid level in circulation fluid storage tank 2, and motor-driven valve V3 closes, and motor-driven valve V2 opens, concentrate is entered concentrate storage tank 5, after liquid emptying in the circulation fluid storage tank, motor-driven valve V2 closes, and a concentrated cycle finishes; Motor-driven valve V4 opens, and second period begins, and constantly circulation concentrates and so forth.But this system also the people for stopping, with solution of emergent event.
The temperature that temperature control system 3 sets in the circulation fluid storage tank 2 is to determine according to relevant parameters such as the character of selected milipore filter and waste liquid characteristics, can guarantee that it has higher membrane flux, and move under the maximum energy-saving parameter;
The cocnentration factor that the tank level control system 4 of control striking point sets in the circulation fluid storage tank 2 can be determined according to the character of film and the characteristic of pulping waste liquor, can carry out the final cocnentration factor that energy consumption contrast back is determined, makes it guarantee that it has better power savings advantages.
Chemical cleaning is adopted in the cleaning of milipore filter, during cleaning, the concentrate storage tank is as the chemical cleaning solution storage tank, and cleaning process is consistent with the waste liquid lock out operation, be band and press the high speed wash cycles, clean back liquid and pass through concentrate storage tank leakage fluid dram and see through liquid leakage fluid dram hand-operated valve control discharging.
Usefulness of the present invention is mainly reflected in energy-conservation aspect, and waste liquid is sent the receipts boiler combustion back to after isolating moisture more than 60% by the milipore filter pre-concentration again after the evaporate station enhanced water evaporation concentrates, can save a large amount of heat energy in this process. Simultaneously, also be embodied in operational flexibility and simplicity aspect, the temperature control system of setting up in this system can be improved the water flux of milipore filter; The level sensing control system can be set cocnentration factor, and flexible operation is simple, and guarantees the stable operation of concentration systems; The unique design of stainless steel baffling channel frame just can to a certain extent realize system auto purification by improving the concentrate circulation rate also for operation brings convenience in the membrane cisterna in experimentation, reduces the system-down wash number.
Claims (3)
1. the plate-type hyperfiltration membrane separation device that concentrates of being applicable to a machine pulp-making effluent, comprise plate-type hyperfiltration membrane assembly (6), stoste storage tank (1), circulation fluid storage tank (2), see through liquid storage tank (7), temperature control system (3), liquid level sensor control system (4), liquid film pump (P1), Pressure gauge, flowmeter (FE1, FE2), a plurality of control valves and pipeline, it is characterized in that: described stoste storage tank (1) by pipeline successively with circulation fluid storage tank (2), liquid film pump (P1), flowmeter (FE1), plate-type hyperfiltration membrane assembly (6), pressure regulator valve (V6), seeing through liquid storage tank (7) and concentrate storage tank (5) links, the concentrated solution outlet of described plate-type hyperfiltration membrane assembly (6) and pressure regulator valve (V6) series circulation are got back to circulation fluid storage tank (2), being connected by pipeline with the flowmeter (FE2) that is used for measuring and through liquid storage tank (7) of described plate-type hyperfiltration membrane assembly (6), be provided with liquid level sensor control system (4) and temperature control system (3) in the described circulation liquid bath (2) through liquid through the liquid outlet.
2. plate-type hyperfiltration membrane separation device according to claim 1; it is characterized in that plate-type hyperfiltration membrane assembly inside is the baffling channel design; this baffling channel design can prevent the short stream of waste liquid; and under the high speed souring of circulation fluid, can realize the auto purification of face, the shutdown wash number of plate-type hyperfiltration membrane separation device is reduced.
3. plate-type hyperfiltration film device according to claim 1, it is characterized in that being provided with in the circulation fluid storage tank level sensing control system, this level sensing control system can be controlled the cocnentration factor of liquid, and comes concentrating of property performance period by the switch of the serial motor-driven valve of control (V2, V3, V4) and the start-stop of liquid film compression pump (P1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200910088247 CN101934196B (en) | 2009-07-14 | 2009-07-14 | Plate type ultra-filtration membrane separation device for chemical-mechanical pulp making waste liquid concentration |
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| CN 200910088247 CN101934196B (en) | 2009-07-14 | 2009-07-14 | Plate type ultra-filtration membrane separation device for chemical-mechanical pulp making waste liquid concentration |
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| CN101934196A true CN101934196A (en) | 2011-01-05 |
| CN101934196B CN101934196B (en) | 2012-10-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106000103A (en) * | 2016-07-22 | 2016-10-12 | 吉林惠利现代轻工装备有限公司 | Fluid feed liquid concentration device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1270812C (en) * | 2004-02-04 | 2006-08-23 | 刘寿山 | Utrafiltration apparatus and its operation guide |
| CN2877835Y (en) * | 2006-03-17 | 2007-03-14 | 胡菊祥 | Ultrafiltration film apparatus for separating and recovering alkali waste liquid |
| CN101285277B (en) * | 2008-04-30 | 2010-08-25 | 宜宾长毅浆粕有限责任公司 | Hyperfiltration process of pulping and digesting black liquor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106000103A (en) * | 2016-07-22 | 2016-10-12 | 吉林惠利现代轻工装备有限公司 | Fluid feed liquid concentration device |
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Address after: 100102, Beijing Wangjing science and Technology Park, Chaoyang District No. 4 Yang Lu, No. 302 light building, room 3 Applicant after: China National Pulp & Paper Research Institute Address before: 100032 Beijing city Chongwen District No. 7 South off the 5 floor of the Warwick International Apartments room 1510 Applicant before: China National Pulp & Paper Research Institute |
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Address after: 100102, Beijing Wangjing science and Technology Park, Chaoyang District No. 4 Yang Lu, No. 302 light building, room 3 Patentee after: China pulp and Paper Research Institute Co., Ltd. Address before: 100102, Beijing Wangjing science and Technology Park, Chaoyang District No. 4 Yang Lu, No. 302 light building, room 3 Patentee before: China National Pulp & Paper Research Institute |