CN211595283U - Two-step type saponin wastewater pretreatment system - Google Patents
Two-step type saponin wastewater pretreatment system Download PDFInfo
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- CN211595283U CN211595283U CN201922432814.3U CN201922432814U CN211595283U CN 211595283 U CN211595283 U CN 211595283U CN 201922432814 U CN201922432814 U CN 201922432814U CN 211595283 U CN211595283 U CN 211595283U
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Abstract
The utility model relates to a two-step saponin waste water pretreatment system, including waste liquid flocculation equipment, filter, drawing liquid pump, membrane separation equipment, treatment fluid storage equipment, sulfuric acid tank, acid-resistant drawing liquid pump and ammonium sulfate collection tank, the liquid outlet end of waste liquid flocculation equipment is connected with the feed liquor end of filter, the liquid outlet end of filter is through connecting the feed liquor end of drawing liquid pump, the liquid outlet end of drawing liquid pump is connected with the pipe layer inlet of membrane separation equipment, the pipe layer liquid outlet of membrane separation equipment is connected with treatment fluid storage equipment; the liquid outlet of the shell layer of the membrane separation equipment is connected with the liquid inlet of the ammonium sulfate collecting tank, the liquid inlet of the shell layer of the membrane separation equipment is connected with the liquid outlet end of the acid-resistant liquid pump, and the liquid inlet end of the acid-resistant liquid pump is connected with the liquid outlet end of the sulfuric acid tank. The utility model discloses carry out two steps of processing to saponin waste water with the mode of mixing flocculation and ammonia nitrogen recovery, can reduce suspended solid and COD by a wide margin, can retrieve the ammonia nitrogen simultaneously, can carry out the pretreatment that the effect is showing to saponin waste water.
Description
Technical Field
The utility model relates to an ecological processing technology field of saponin waste water, concretely relates to two-step saponin waste water pretreatment system.
Background
In the process of producing saponin, the industrial wastewater causes pollution to the environment, and the pollution is dazzling. According to statistics, for producing 1 ton of saponin, 130-180 ton of fresh turmeric, 15-20 ton of industrial sulfuric acid, 1 ton of l 0% sodium hydroxide and 6 ton of 120 gasoline are needed. The waste water produced by producing 1 ton saponin can be up to 500-1000 tons. Calculated by 800 tons of saponin produced every year in China, the discharge amount of saponin waste water in China is about 40 ten thousand tons to 80 ten thousand tons.
The saponin production wastewater mainly contains substances such as saccharides, peltate, organic acids, short-chain alcohol, aldehydes, inorganic salts and the like, has the characteristics of five high sugar contents (1), and the total sugar mass fraction of the comprehensive wastewater is about 2 percent, wherein most of the comprehensive wastewater is monosaccharide; (2) high acidity, the pH value of the waste water is between 0.7 and 2.5, the biodegradability is poor, and the BOD/COD is about 0.27; (3) high salinity, Cl in waste water-(HCl hydrolysis Process), SO4 2-(H2SO4Hydrolysis process) is high; (4) high load, the COD value of the comprehensive waste water is 20000-30000 mg/L; (5) high chroma, and dark brown waste water due to complex composition and high organic matter concentration. The water quality of the saponin wastewater is complex, and the conventional physicochemical or biochemical treatment has low efficiency, the effluent cannot reach the discharge standard, and the waste of recyclable resources in the wastewater is great; some special processes have large investment, complex system, high treatment cost and stability to be improved.
Therefore, the available resources are recycled to the maximum extent, and then the comprehensive treatment is carried out by combining a plurality of treatment methods, so that the pollution of the saponin production to the environment is reduced to the minimum, and finally the harmonious development of economy and environment is achieved.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to above not enough, provide a two-step saponin waste water pretreatment system, this system at first utilizes CaO and PAC mixed flocculant to carry out the flocculation and precipitation to saponin waste water to COD in the flocculation and saponin waste water reduces TP content and suspended solid content simultaneously, promotes the pH of waste water, carries out the sediment filtration to preliminary treatment waste water afterwards, and the supernatant utilizes membrane separation device to retrieve ammonia nitrogen wherein, and then satisfies emission standard.
For solving the technical problem, the utility model discloses a following technical scheme:
the two-step saponin wastewater pretreatment system comprises a waste liquid flocculation device, a filter, a liquid pump, a membrane separation device, a treatment liquid storage device, a sulfuric acid tank, an acid-resistant liquid pump and an ammonium sulfate collection tank, wherein the liquid outlet end of the waste liquid flocculation device is connected with the liquid inlet end of the filter, the liquid outlet end of the filter is connected with the liquid inlet end of the liquid pump, the liquid outlet end of the liquid pump is connected with a pipe layer liquid inlet of the membrane separation device, and a pipe layer liquid outlet of the membrane separation device is connected with the treatment liquid storage device;
a liquid outlet of a shell layer of the membrane separation equipment is connected with a liquid inlet of the ammonium sulfate collecting tank, a liquid inlet of a shell layer of the membrane separation equipment is connected with a liquid outlet end of an acid-resistant liquid pump, and a liquid inlet end of the acid-resistant liquid pump is connected with a liquid outlet end of a sulfuric acid tank;
waste liquid flocculation equipment is used for flocculating saponin production sewage, the filter is used for filtering the saponin production sewage after the flocculation, the drawing liquid pump is arranged in taking out membrane splitter with saponin production sewage, membrane splitter is used for carrying out deamination treatment to saponin production sewage, obtains parting liquid and saponin production wastewater to make sulphuric acid and parting liquid reaction obtain the ammonium sulfate, the parting film in the membrane splitter separates membrane splitter for tube layer and shell, treatment solution storage equipment is used for saving saponin production wastewater, the ammonium sulfate collecting tank is used for saving the ammonium sulfate.
Further, the waste liquid flocculation equipment is CaO and PAC dosing flocculation equipment.
Further, the filter is a mesh filter.
The utility model has the advantages that: 1. the utility model discloses with COD, TP, SS of CaO and PAC mixed flocculant in with saponin production waste water desorption.
2. The utility model discloses a membrane separation equipment carries out the deamination to saponin waste water, adopts the sulphuric acid of certain volume fraction, can reduce the ammonia nitrogen concentration in the waste liquid to below 80mg/L about 2 hours of operation, and the ammonia nitrogen of recovery is preserved with the ammonium sulfate form, can be used to nitrogen fertilizer production.
Drawings
Fig. 1 is a general schematic diagram of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. waste liquid flocculation equipment; 2. a filter; 3. a liquid pump; 4. a membrane separation device; 5. a treatment liquid storage device; 6. a sulfuric acid tank; 7. an acid-resistant liquid pump; 8. ammonium sulfate collecting tank
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
As shown in fig. 1, the two-step saponin wastewater pretreatment system comprises a waste liquid flocculation device 1, a filter 2, a liquid pump 3, a membrane separation device 4, a treatment liquid storage device 5, a sulfuric acid tank 6, an acid-proof liquid pump 7 and an ammonium sulfate collection tank 8, wherein the liquid outlet end of the waste liquid flocculation device 1 is connected with the liquid inlet end of the filter 2, the liquid outlet end of the filter 2 is connected with the liquid inlet end of the liquid pump 3, the liquid outlet end of the liquid pump 3 is connected with the tube layer liquid inlet of the membrane separation device 4, and the tube layer liquid outlet of the membrane separation device 4 is connected with the treatment liquid storage device 5;
a liquid outlet of a shell layer of the membrane separation equipment 4 is connected with a liquid inlet of the ammonium sulfate collecting tank 8, a liquid inlet of a shell layer of the membrane separation equipment 4 is connected with a liquid outlet end of an acid-resistant liquid pump 7, and a liquid inlet end of the acid-resistant liquid pump 7 is connected with a liquid outlet end of a sulfuric acid tank 6;
waste liquid flocculation equipment 1 is used for flocculating saponin production sewage, filter 2 is used for filtering the saponin production sewage after the flocculation, drawing liquid pump 3 is used for taking out saponin production sewage in membrane separation equipment 4, membrane separation equipment 4 is used for carrying out deamination treatment to saponin production sewage, obtains parting liquid and saponin production waste water to make sulphuric acid and parting liquid reaction obtain the ammonium sulfate, the parting film in membrane separation equipment 4 separates membrane separation equipment 4 for tube layer and shell, treatment fluid storage equipment 5 is used for saving saponin production waste water, ammonium sulfate collecting tank 8 is used for saving the ammonium sulfate.
Further, the waste liquid flocculation device 1 is a CaO and PAC dosing flocculation device.
Further, the filter 2 is a mesh filter.
The utility model discloses a use method does:
step 1: in the waste liquid flocculation equipment, CaO is firstly adopted to raise the pH of saponin production sewage to 6-7, and SO in the saponin production sewage is simultaneously precipitated4 2-Then, a CaO/PAC mixed flocculant is adopted to flocculate the saponin production sewage so as to reduce the content of suspended matters, COD and TP in the saponin production sewage, the saponin production sewage treated by the mixed flocculant is introduced into a filter through a liquid outlet of a waste liquid flocculation device, and impurities in the saponin production sewage are further filtered;
step 2: the flocculated supernatant of the waste liquid from saponin production after being filtered by the filter is conveyed to a pipe layer of the membrane separation equipment by a liquid pump through a pipe layer liquid inlet of the membrane separation equipment, meanwhile, the acid-proof liquid pump conveys sulfuric acid with a certain volume fraction in a sulfuric acid tank to a shell layer of the membrane separation equipment through a shell layer liquid inlet of the membrane separation equipment, the flow rates of the two liquids are adjusted by the liquid pump and the acid-proof liquid pump, and the flow directions of the flocculated supernatant and the sulfuric acid with a certain volume fraction are opposite;
and step 3: in the membrane separation equipment, the ammonia nitrogen in the supernatant of the waste liquid of saponin production separated by the membrane separation equipment is absorbed by sulfuric acid to form ammonium sulfate solution, and the ammonium sulfate solution is conveyed to an ammonium sulfate collecting tank by a shell layer liquid outlet of the membrane separation equipment for storage. The saponin production wastewater with separated ammonia nitrogen is conveyed to a treatment fluid storage device through a tube layer liquid outlet for standby and is used for subsequent treatment.
The foregoing is illustrative of the best mode of the invention, and details not described herein are within the common general knowledge of a person of ordinary skill in the art. The protection scope of the present invention is subject to the content of the claims, and any equivalent transformation based on the technical teaching of the present invention is also within the protection scope of the present invention.
Claims (3)
1. The two-step saponin wastewater pretreatment system is characterized by comprising a waste liquid flocculation device (1), a filter (2), a liquid pump (3), a membrane separation device (4), a treatment liquid storage device (5), a sulfuric acid tank (6), an acid-resistant liquid pump (7) and an ammonium sulfate collection tank (8), wherein the liquid outlet end of the waste liquid flocculation device (1) is connected with the liquid inlet end of the filter (2), the liquid outlet end of the filter (2) is connected with the liquid inlet end of the liquid pump (3), the liquid outlet end of the liquid pump (3) is connected with a pipe layer liquid inlet of the membrane separation device (4), and a pipe layer liquid outlet of the membrane separation device (4) is connected with the treatment liquid storage device (5);
a liquid outlet of a shell layer of the membrane separation equipment (4) is connected with the ammonium sulfate collecting tank (8), a liquid inlet of a shell layer of the membrane separation equipment (4) is connected with a liquid outlet end of an acid-resistant liquid pump (7), and a liquid inlet end of the acid-resistant liquid pump (7) is connected with a liquid outlet end of a sulfuric acid tank (6);
waste liquid flocculation equipment (1) is used for flocculating saponin production sewage, filter (2) are used for filtering the saponin production sewage after the flocculation, drawing liquid pump (3) are arranged in being taken out membrane separation equipment (4) with saponin production sewage, membrane separation equipment (4) are used for carrying out deamination to saponin production sewage, obtain separation ammonia and saponin production waste water to make sulphuric acid and separation ammonia reaction obtain the ammonium sulfate, the separating membrane in membrane separation equipment (4) separates membrane separation equipment (4) for tube layer and shell, treatment fluid storage equipment (5) are used for saving saponin production waste water, ammonium sulfate collection tank (8) are used for saving the ammonium sulfate.
2. The two-step saponin waste water pretreatment system of claim 1, wherein the waste liquid flocculation apparatus (1) is a CaO and PAC dosing flocculation apparatus.
3. The two-step saponin wastewater pretreatment system of claim 1, wherein said filter (2) is a mesh filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922432814.3U CN211595283U (en) | 2019-12-30 | 2019-12-30 | Two-step type saponin wastewater pretreatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922432814.3U CN211595283U (en) | 2019-12-30 | 2019-12-30 | Two-step type saponin wastewater pretreatment system |
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| Publication Number | Publication Date |
|---|---|
| CN211595283U true CN211595283U (en) | 2020-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922432814.3U Active CN211595283U (en) | 2019-12-30 | 2019-12-30 | Two-step type saponin wastewater pretreatment system |
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| CN (1) | CN211595283U (en) |
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- 2019-12-30 CN CN201922432814.3U patent/CN211595283U/en active Active
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