CN111116935A - Method for extracting humic acid substances from biogas slurry - Google Patents
Method for extracting humic acid substances from biogas slurry Download PDFInfo
- Publication number
- CN111116935A CN111116935A CN201911357097.0A CN201911357097A CN111116935A CN 111116935 A CN111116935 A CN 111116935A CN 201911357097 A CN201911357097 A CN 201911357097A CN 111116935 A CN111116935 A CN 111116935A
- Authority
- CN
- China
- Prior art keywords
- humic acid
- biogas slurry
- filter cartridge
- acid substances
- desorption agent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- QJZYHAIUNVAGQP-UHFFFAOYSA-N 3-nitrobicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid Chemical compound C1C2C=CC1C(C(=O)O)C2(C(O)=O)[N+]([O-])=O QJZYHAIUNVAGQP-UHFFFAOYSA-N 0.000 title claims abstract description 64
- 239000004021 humic acid Substances 0.000 title claims abstract description 64
- 239000002002 slurry Substances 0.000 title claims abstract description 46
- 239000000126 substance Substances 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000000108 ultra-filtration Methods 0.000 claims abstract description 46
- 239000012528 membrane Substances 0.000 claims abstract description 45
- 238000003795 desorption Methods 0.000 claims abstract description 34
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 28
- 239000007788 liquid Substances 0.000 claims abstract description 25
- 239000011347 resin Substances 0.000 claims abstract description 23
- 229920005989 resin Polymers 0.000 claims abstract description 23
- 238000001914 filtration Methods 0.000 claims abstract description 18
- 150000001450 anions Chemical class 0.000 claims abstract description 16
- 239000000701 coagulant Substances 0.000 claims abstract description 11
- 238000001179 sorption measurement Methods 0.000 claims abstract description 9
- 229910017053 inorganic salt Inorganic materials 0.000 claims abstract description 4
- 239000000243 solution Substances 0.000 claims description 27
- 239000000919 ceramic Substances 0.000 claims description 26
- 238000004140 cleaning Methods 0.000 claims description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 15
- 238000005406 washing Methods 0.000 claims description 15
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 5
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 5
- 235000011152 sodium sulphate Nutrition 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 4
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims description 3
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 3
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 3
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 3
- 239000011259 mixed solution Substances 0.000 claims description 3
- 238000001556 precipitation Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 9
- 150000003839 salts Chemical class 0.000 abstract description 6
- 159000000007 calcium salts Chemical class 0.000 abstract description 4
- 159000000003 magnesium salts Chemical class 0.000 abstract description 4
- 238000000605 extraction Methods 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- 230000014759 maintenance of location Effects 0.000 description 6
- 239000003337 fertilizer Substances 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 229920002521 macromolecule Polymers 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08H—DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS
- C08H6/00—Macromolecular compounds derived from lignin, e.g. tannins, humic acids
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biochemistry (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention relates to the technical field of humic acid extraction, and particularly discloses a method for extracting humic acid substances from biogas slurry, which comprises the following steps: introducing the biogas slurry into an adsorption tank containing alkaline anion resin, adsorbing humic acid in the biogas slurry by the alkaline anion resin, and separating out other micromolecular organic matters and inorganic salt; putting the alkaline anion resin into a desorption agent solution, and simultaneously putting ultrasonic equipment into the desorption agent solution to obtain mixed liquid containing humic acid and a desorption agent; separating humic acid from the desorbent solution by passing the mixed liquid through ultrafiltration membrane equipment to obtain a humic acid product; adding a coagulant into the desorption agent solution, filtering, and using the obtained filtered desorption agent solution for desorption treatment again. By adopting the technical scheme, the problem that metal salts such as magnesium salt, calcium salt and the like in biogas slurry pollute the ultrafiltration membrane and reduce the filtering effect in the prior art is solved.
Description
Technical Field
The invention relates to the technical field of humic acid extraction, and particularly relates to a method for extracting humic acid substances from biogas slurry.
Background
Humic acid is a mixture of natural organic macromolecular compounds, widely exists in nature, and has the beneficial effects of improving soil structure, promoting the formation of aggregates, coordinating the water, fertilizer, gas and heat conditions of soil, not only ventilating, but also preserving water and preventing hardening, simultaneously enhancing the fertilizer preserving and supplying capacity of soil, keeping strong fertilizer maintaining capacity, reducing effective nutrient loss, lasting fertilizer supplying time, improving soil acidity and alkalinity, lightening the side effect of toxic factors and the like.
However, as large-scale large and medium-scale biogas projects are developed in China in recent years, the biogas projects not only provide a large amount of biogas, but also form a large amount of biogas slurry, and the biogas slurry is large in biogas slurry amount and rich in humic acid, so that the biogas slurry becomes a main source for extracting humic acid, and contains a certain amount of inorganic salts (calcium salt, magnesium salt and the like) besides macromolecular organic matters such as humic acid, so that when the biogas slurry is filtered by an ultrafiltration membrane in an ultrafiltration process, metal salts such as calcium salt and magnesium salt pollute the ultrafiltration membrane, and the effect of the filtration membrane is reduced.
Disclosure of Invention
The invention provides a method for extracting humic acid substances from biogas slurry, which aims to solve the problems that an ultrafiltration membrane is easily polluted and the filtration effect is reduced in the conventional ultrafiltration process.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a method for extracting humic acid substances from biogas slurry comprises the following steps:
step 1: introducing the biogas slurry into an adsorption tank containing alkaline anion resin, adsorbing humic acid in the biogas slurry by the alkaline anion resin, and separating out other micromolecular organic matters and inorganic salt;
step 2: putting the alkaline anion resin in the step 1 into a desorption agent solution, and putting ultrasonic equipment into the desorption agent solution to obtain mixed liquid containing humic acid and a desorption agent;
and step 3: separating humic acid from the desorbent solution by passing the mixed liquid obtained in the step 2 through ultrafiltration membrane equipment to obtain a humic acid product;
and 4, step 4: and (3) adding a coagulant into the desorbent solution obtained in the step (3) and filtering to obtain a filtered desorbent solution, and reusing the filtered desorbent solution in the step (2).
The technical principle and the effect of the technical scheme are as follows:
because basic anion resin has the absorption selectivity in this scheme, can be preferred the humic acid material of physical adsorption macromolecule, consequently can separate humic acid material and other micro molecule organic matters and inorganic salt in the natural pond liquid, and through the effect of desorption agent, with humic acid material desorption, the use of ultrasonic equipment in this scheme has improved the desorption speed of humic acid in the resin.
In addition, separation between humic acid and a desorbent solution is realized through ultrafiltration membrane equipment, and since inorganic salts in biogas slurry are filtered by alkaline anion resin, the problem that the ultrafiltration membrane is polluted by magnesium salt, calcium salt and the like in the prior art is solved, and in the step 4, a coagulant is added into the desorbent solution, so that the coagulant and the humic acid possibly remaining in the desorbent solution are subjected to a complex reaction to form floccules, and the humic acid remaining in the desorbent solution is completely removed, so that the desorbent solution with higher purity is obtained, and the desorption of the humic acid is more facilitated when the solution enters the desorption step in the step 2 again.
Further, before step 1, the biogas slurry is subjected to multiple precipitation, large particle impurities in the biogas slurry are filtered, and then suspended matters in the biogas slurry are subjected to filtration and separation.
Has the advantages that: this avoids the detrimental effect of some large particle impurities and suspended matter on the resin adsorption.
Further, the hydraulic retention time of the biogas slurry in the adsorption tank in the step 1 is 2.5-3 h.
Has the advantages that: the humic acid substances can not be completely adsorbed by the resin when the hydraulic retention time is too short, small molecules and even inorganic salts can be adsorbed into the resin when the hydraulic retention time is too long, and the inventor proves that the hydraulic retention time is optimal within 2.5-3 h through experiments.
Further, the desorption agent in the step 3 is a mixed solution of sodium sulfate with the mass concentration of 5-8% and sodium hydroxide with the mass concentration of 9-15%.
Has the advantages that: the desorption agent prepared in the way can quickly finish the desorption treatment of humic acid in the alkaline anion resin.
Further, the coagulant in the step 4 is one of aluminum sulfate, polyaluminium silicate or ferric chloride.
Has the advantages that: the three coagulants added into the desorption agent can generate flocculent complex with humic acid substances, and are convenient to separate.
Further, the operating pressure of the ultrafiltration membrane equipment in the step 2 is 1.0-1.5 MPa.
Has the advantages that: under the pressure, the desorbent in the mixed liquid is forced to pass through the ultrafiltration membrane, and the separation of the desorbent and the humic acid is completed.
Further, ultrafiltration membrane equipment in step 3 includes the cartridge filter that the level set up, and the both ends of cartridge filter are sealed, and cartridge filter one end is fixed with the discharge bin, and the discharge bin is equipped with the discharge port, and the inlet that keeps away from the discharge bin is seted up to the cartridge filter top, and the flowing back drill way has been seted up to the cartridge filter below, is fixed with a plurality of tubulose ceramic ultrafiltration membranes in the cartridge filter, ceramic ultrafiltration membrane and discharge bin intercommunication.
Has the advantages that: and (3) pumping the mixed liquid in the step (2) into a filter cylinder from a liquid inlet, controlling the pressure of the pump to be 1.0-1.5 MPa, filtering the mixed liquid entering the filter cylinder under the action of the ceramic ultrafiltration membrane, allowing a desorption agent to enter the ceramic ultrafiltration membrane and flow to a discharge bin along the inside of the ceramic ultrafiltration membrane, and allowing humic acid to be remained in the filter cylinder and be discharged from a liquid outlet after the filtration is finished.
Further, be equipped with the washing structure in the cartridge filter, wash the structure and include a plurality of washing rings, each pottery milipore filter outside all overlaps and is equipped with the washing ring, is equipped with annular cavity in the washing ring, has seted up a plurality of discharge holes on the inner wall of washing ring, and each washing ring passes through the pipeline intercommunication, is equipped with the driving piece that the drive was controlled about washing the structure and is supplied with the piece to washing the structure water on the cartridge filter.
Has the advantages that: because the ceramic ultrafiltration membrane is used for a period of time, humic acid can be deposited on the outer wall of the ceramic ultrafiltration membrane, if the filtration effect is not cleaned, a large amount of desorbent can be remained in the obtained humic acid, and therefore the cleaning ring is adopted to clean the outer wall of the ceramic ultrafiltration membrane, the deposited humic acid can be cleaned, and the filtration flux of the ultrafiltration membrane is improved.
Further, the driving piece is a cylinder, the cylinder is fixed at one end, far away from the discharge bin, of the filter cartridge, a piston rod of the cylinder is connected with the filter cartridge in a sliding and sealing mode, and the piston rod of the cylinder extends into one end of the filter cartridge and is fixed on the cleaning structure.
Has the advantages that: the cylinder is used as a driving piece, and stable reciprocating movement of the cleaning structure can be achieved.
Further, the supply part is a water pump, one end of the filter cartridge, which is close to the discharge bin, is provided with a through hole, the water outlet of the water pump is communicated with the through hole, a hose is fixed at the through hole, and the water pump pumps the filtered desorbent solution into each cleaning ring through the hose.
Has the advantages that: desorption agent solution after filtering like this not only can get into and wash the ring and wash the outer wall of ceramic milipore filter, and desorption agent solution reenters the cartridge filter environment simultaneously, is filtered under ceramic milipore filter effect once more, makes probably remaining humic acid in it filtered, sets up like this simultaneously and can carry out the washing to ceramic milipore filter in the cartridge filter working process, has improved the efficiency of production.
Drawings
FIG. 1 is a schematic structural view of an ultrafiltration membrane apparatus used in an embodiment of the present invention;
fig. 2 is a sectional view taken along the line a-a in fig. 1.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: the device comprises a filter cartridge 10, a discharge bin 11, a discharge port 12, a liquid inlet 13, a liquid discharge port 14, a ceramic ultrafiltration membrane 15, a cleaning ring 16, an annular cavity 17, a discharge hole 18, a cylinder 19, a water pump 20, a through hole 21 and a hose 22.
The parameters of the method for extracting humic acid substances from biogas slurry in the embodiment 1-4 are shown in the following table 1:
table 1 shows the process parameters of examples 1 to 4
| Example 1 | Example 2 | Example 3 | Example 4 | |
| Hydraulic retention time (h) | 2.5 | 2.5 | 3 | 3 |
| Sodium sulfate Mass concentration (%) | 5 | 6 | 8 | 5 |
| Sodium hydroxide mass concentration (%) | 10 | 9 | 12 | 15 |
| Operating pressure (MPa) | 1.5 | 1.2 | 1.1 | 1.0 |
A method for extracting humic acid substances from biogas slurry is described in detail by taking example 1 as an example, and examples 2 to 4 are the same as example 1 except for the difference of parameters in table 1.
A method for extracting humic acid substances from biogas slurry comprises the following steps:
step 1: pretreating the biogas slurry, filtering large-particle impurities in the biogas slurry by adopting a multi-precipitation mode, and then filtering and separating suspended matters in the biogas slurry; introducing the pretreated biogas slurry into an adsorption tank containing alkaline anion resin, wherein the hydraulic retention time of the biogas slurry in the adsorption tank is 2.5h, the alkaline anion resin absorbs humic acid substances in the biogas slurry, and other micromolecular organic matters and inorganic salts are separated, and the types of the alkaline anion resin adopted in the embodiment are 201x4 resin, 201x 7 resin or D201 resin.
Step 2: and (2) putting the alkaline anion resin adsorbed with humic acid substances in the step (1) into a desorption agent solution, putting ultrasonic equipment into the desorption agent solution at the same time, wherein the power of the ultrasonic equipment is 60W, and starting the ultrasonic equipment while desorbing to obtain mixed liquid containing humic acid and desorption agent, wherein the desorption agent is mixed solution of sodium sulfate and sodium hydroxide, the mass concentration of the sodium sulfate is 5%, and the mass concentration of the sodium hydroxide is 10%.
And step 3: and (3) separating humic acid from a desorbent by passing the mixed liquid obtained in the step (2) through ultrafiltration membrane equipment to obtain a humic acid product with the purity of more than 92%, wherein the operation pressure of the ultrafiltration membrane equipment is 1.5 MPa.
And 4, step 4: adding a coagulant into the desorption agent obtained in the step 3, reacting the coagulant with a small amount of residual humic acid in the desorption agent to generate floccule, and filtering the floccule to obtain the desorption agent which can be recycled in the step 2, wherein in the embodiment, the coagulant is one of aluminum sulfate, polyaluminium silicate or ferric chloride.
The ultrafiltration membrane apparatus used in step 3, as shown in fig. 1, includes a filter cartridge 10 horizontally disposed, two ends of the filter cartridge 10 are sealed, a discharge bin 11 is fixedly connected to a left end of the filter cartridge 10, a discharge port 12 is disposed on the discharge bin 11, a liquid inlet 13 located at an upper right side is disposed on the filter cartridge 10, a liquid discharge port 14 located at a lower left side is further disposed on the filter cartridge 10, a plurality of tubular ceramic ultrafiltration membranes 15 are horizontally fixed in the filter cartridge 10, a molecular weight cut-off of the ceramic ultrafiltration membranes 15 in this embodiment is not lower than 1000Da, a right end of the ceramic ultrafiltration membranes 15 is fixed on the filter cartridge 10, and a left end of the ceramic ultrafiltration membranes is communicated with the discharge.
Referring to fig. 2, a cleaning structure is arranged in the filter cartridge 10, the cleaning structure comprises a plurality of cleaning rings 16, each ceramic ultrafiltration membrane 15 is sleeved with a cleaning ring 16, the inner diameter of each cleaning ring 16 is 3-5 cm larger than the diameter of the ceramic ultrafiltration membrane 15, each cleaning ring 16 is internally provided with an annular cavity 17, a plurality of discharge holes 18 which are uniformly distributed around the circumference are arranged on the inner wall of the cleaning ring 16, the cleaning rings 16 are sequentially communicated through a pipeline, a cylinder 19 which drives the cleaning structure to horizontally reciprocate is fixed at the right end of the filter cylinder 10, a piston rod of the cylinder 19 is sealed at the right end of the filter cylinder 10 in a sliding manner, the piston rod of the cylinder 19 extends into one end of the filter cylinder 10 and is fixedly connected with the cleaning structure, a water pump 20 is also arranged in the discharge bin 11, a through hole 21 is arranged at the left end of the filter cylinder 10, the water outlet of the water pump 20 is communicated with the through hole 21, a hose 22 communicating with a pipe connected to the cleaning ring 16 is fixedly connected to the through hole 21.
The operating principle of the ultrafiltration membrane equipment is as follows: and (3) pumping the mixed liquid in the step (2) into a filter cylinder 10 from a liquid inlet 13, controlling the pressure of the pumped mixed liquid to be 1.0-1.5 MPa, filtering the desorption agent of the mixed liquid entering the filter cylinder 10 into the ceramic ultrafiltration membrane 15 under the action of the ceramic ultrafiltration membrane 15, allowing the desorption agent to flow to a discharge bin 11 along the inside of the ceramic ultrafiltration membrane 15, and allowing humic acid to remain in the filter cylinder 10 and be discharged from a liquid outlet after filtering.
After the ultrafiltration membrane equipment works for a period of time, the water pump 20 and the air cylinder 19 are started simultaneously, the water pump 20 pumps the desorbent solution in the discharge bin 11 into the hose 22, the desorbent solution enters the annular cavities 17 of the cleaning rings 16 and is discharged from the discharge hole 18 to act on the outer wall of the ceramic ultrafiltration membrane 15, the humic acid layer deposited on the outer wall of the ceramic ultrafiltration membrane 15 is washed and cleaned, meanwhile, the pumped desorbent solution enters the filter cylinder 10 again and is filtered by the ceramic ultrafiltration membrane 15 again, and the humic acid contained in the humic acid can be completely separated.
The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (10)
1. A method for extracting humic acid substances from biogas slurry is characterized by comprising the following steps: the method comprises the following steps:
step 1: introducing the biogas slurry into an adsorption tank containing alkaline anion resin, adsorbing humic acid in the biogas slurry by the alkaline anion resin, and separating out other micromolecular organic matters and inorganic salt;
step 2: putting the alkaline anion resin in the step 1 into a desorption agent solution, and putting ultrasonic equipment into the desorption agent solution to obtain mixed liquid containing humic acid and a desorption agent;
and step 3: separating humic acid from the desorbent solution by passing the mixed liquid obtained in the step 2 through ultrafiltration membrane equipment to obtain a humic acid product;
and 4, step 4: and (3) adding a coagulant into the desorbent solution obtained in the step (3) and filtering to obtain a filtered desorbent solution, and reusing the filtered desorbent solution in the step (2).
2. The method for extracting humic acid substances from biogas slurry as claimed in claim 1, wherein: before step 1, the biogas slurry is subjected to multiple precipitation, large particle impurities in the biogas slurry are filtered, and then suspended matters in the biogas slurry are subjected to filtration and separation.
3. The method for extracting humic acid substances from biogas slurry as claimed in claim 1, wherein: and in the step 1, the biogas slurry stays in the adsorption tank for 2.5-3 h in a hydraulic manner.
4. The method for extracting humic acid substances from biogas slurry as claimed in claim 1, wherein: and in the step 3, the desorption agent is a mixed solution of sodium sulfate with the mass concentration of 5-8% and sodium hydroxide with the mass concentration of 9-15%.
5. The method for extracting humic acid substances from biogas slurry as claimed in claim 1, wherein: and the coagulant in the step 4 is one of aluminum sulfate, polyaluminium silicate or ferric chloride.
6. The method for extracting humic acid substances from biogas slurry as claimed in claim 1, wherein: and 2, the operating pressure of the ultrafiltration membrane equipment in the step 2 is 1.0-1.5 MPa.
7. The method for extracting humic acid substances from biogas slurry as claimed in claim 6, wherein: the ultrafiltration membrane equipment in the step 3 comprises a filter cartridge which is horizontally arranged, the two ends of the filter cartridge are sealed, one end of the filter cartridge is fixed with a discharge bin, the discharge bin is provided with a discharge port, a liquid inlet far away from the discharge bin is formed in the upper portion of the filter cartridge, a liquid discharge hole opening is formed in the lower portion of the filter cartridge, a plurality of tubular ceramic ultrafiltration membranes are fixed in the filter cartridge, and the ceramic ultrafiltration membranes are communicated with the discharge bin.
8. The method for extracting humic acid substances from biogas slurry as claimed in claim 7, wherein: be equipped with the washing structure in the cartridge filter, wash the structure and include a plurality of washing rings, each pottery milipore filter outside all overlaps and is equipped with the washing ring, is equipped with annular cavity in the washing ring, has seted up a plurality of discharge holes on the inner wall of washing ring, and each washing ring passes through the pipeline intercommunication, is equipped with the driving piece that the drive was washd the structure and was removed and to the supply member that washs the structure water supply on the cartridge filter.
9. The method for extracting humic acid substances from biogas slurry as claimed in claim 8, wherein: the driving piece is a cylinder, the cylinder is fixed at one end, far away from the discharge bin, of the filter cartridge, a piston rod of the cylinder is connected with the filter cartridge in a sliding and sealing mode, and the piston rod of the cylinder extends into one end of the filter cartridge and is fixed on the cleaning structure.
10. The method for extracting humic acid substances from biogas slurry as claimed in claim 9, wherein: the supply part is a water pump, one end of the filter cartridge, which is close to the discharge bin, is provided with a through hole, the water outlet of the water pump is communicated with the through hole, a hose is fixed at the through hole, and the water pump pumps the filtered desorbent solution into each cleaning ring through the hose.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911357097.0A CN111116935A (en) | 2019-12-25 | 2019-12-25 | Method for extracting humic acid substances from biogas slurry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911357097.0A CN111116935A (en) | 2019-12-25 | 2019-12-25 | Method for extracting humic acid substances from biogas slurry |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111116935A true CN111116935A (en) | 2020-05-08 |
Family
ID=70503804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911357097.0A Pending CN111116935A (en) | 2019-12-25 | 2019-12-25 | Method for extracting humic acid substances from biogas slurry |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111116935A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112390683A (en) * | 2020-11-19 | 2021-02-23 | 江西省三汇科技有限公司 | Humic acid-containing water-soluble fertilizer and preparation method thereof |
-
2019
- 2019-12-25 CN CN201911357097.0A patent/CN111116935A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112390683A (en) * | 2020-11-19 | 2021-02-23 | 江西省三汇科技有限公司 | Humic acid-containing water-soluble fertilizer and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103739104A (en) | System and method for purifying sewage by powdered active carbon | |
| CN201080449Y (en) | Hyperfiltering backwashing water recovery device | |
| WO2012139260A1 (en) | Device for cleaning airlift tubular membrane bioreactor | |
| CN106966536A (en) | Strong brine zero-emission film concentration technology and equipment | |
| CN111116935A (en) | Method for extracting humic acid substances from biogas slurry | |
| CN207294410U (en) | A kind of high concentration COD oil-contained waste water treatment system | |
| CN204417254U (en) | Metal wire-drawing waste liquid oil-water separation purification device | |
| CN104118947B (en) | A kind of method of antibiotic waste water advanced treatment and reuse | |
| CN104291487B (en) | The processing means of a kind of PVC mother liquor waste water treatment for reuse and processing method | |
| CN206554908U (en) | A kind of natural gas well returns discharge fracturing fluid processing unit | |
| CN205676331U (en) | A kind of deferrization and demanganization filtration system | |
| CN213171719U (en) | Mine water treatment device with reverse osmosis function | |
| CN205781065U (en) | A kind of softener valve with regenerative agent feedway and water treatment facilities thereof | |
| CN213141656U (en) | Recycling system of main shaft cooling water | |
| CN214327321U (en) | Reverse osmosis pure water equipment | |
| CN204999657U (en) | Open -air emergent manual reverse osmosis water purifier | |
| CN104310627B (en) | A kind of portable anti-clogging raw water fountain | |
| CN210795998U (en) | Waste water recycling device for power plant pure water equipment | |
| CN209052483U (en) | It is a kind of for handling the device of shale gas fracturing outlet liquid | |
| CN206255899U (en) | A kind of high-performance NF membrane water system | |
| CN208517112U (en) | Underground water heavy metal treatment systems | |
| CN205528067U (en) | Commercial purifier | |
| CN206359357U (en) | A kind of Catalyst sewage zero-discharge treatment system | |
| CN215627181U (en) | Filtration treatment device for online recovery of printing and dyeing rinse water | |
| CN208394986U (en) | A kind of biological degrading sewage processor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200508 |
|
| WD01 | Invention patent application deemed withdrawn after publication |