CN113636726B - Zero-discharge treatment process for abamectin production wastewater - Google Patents
Zero-discharge treatment process for abamectin production wastewater Download PDFInfo
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- CN113636726B CN113636726B CN202111043020.3A CN202111043020A CN113636726B CN 113636726 B CN113636726 B CN 113636726B CN 202111043020 A CN202111043020 A CN 202111043020A CN 113636726 B CN113636726 B CN 113636726B
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- 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
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- 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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
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- 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
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- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- 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
- C02F2001/007—Processes including a sedimentation step
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The invention discloses a zero-emission treatment process of abamectin production wastewater, which comprises the following steps: collecting waste water generated in the production process of the biological pesticide abamectin into an adjusting tank, adjusting the water quality and the water quantity of the waste water, and adjusting the pH value; then sending the waste water into an evaporator for evaporation and concentration; the concentrated solution obtained by evaporation is sent into a dryer for drying, and the condensed liquid obtained by evaporation is sent into an intermediate water pool; sending the condensate of the intermediate water tank into a UASB reactor; sending effluent water after the UASB into a sedimentation tank; the sludge enters a sludge concentration tank, and the effluent of a sedimentation tank enters a hydrolysis acidification tank; the effluent of the hydrolysis acidification tank is sent into a biochemical tank; the effluent of the biochemical tank is sent into an MBR membrane tank for sludge-water separation; then sent into a reverse osmosis system; and feeding the reduced membrane concentrated water into an evaporator for evaporation desalination. Compared with the prior art, the invention can achieve good harmless treatment effect and can reduce the production water cost.
Description
Technical Field
The invention relates to the field of wastewater treatment processes, and particularly relates to a zero-discharge treatment process for abamectin production wastewater.
Background
The abamectin production wastewater is novel pharmaceutical wastewater which appears in recent years, has the characteristics of high organic matter load, high viscosity, pungent smell, unstable water quality and water quantity and the like, has certain toxicity and difficult biodegradation, and belongs to industrial wastewater which is difficult to treat.
With the increasing attention of the country to the environmental protection problem, the treatment of the abamectin production wastewater becomes very important and becomes an important component of the abamectin technical progress. Zero discharge of waste water is not only beneficial to enterprises to meet the environmental protection requirement, but also carries out resource recycling to a certain extent.
At present, the treatment technology of the abamectin production wastewater in China has obtained certain research achievements, and the total treatment ideas mainly comprise three types: firstly, advanced oxidation technologies such as ozone, electrochemistry and the like are adopted as pretreatment, the toxicity of the wastewater is reduced, the biodegradability of the wastewater is improved, and then a biochemical treatment process is carried out, and the wastewater is discharged after reaching the standard; secondly, the abamectin wastewater is directly and independently treated by adopting a high-efficiency anaerobic or anaerobic and aerobic combined process and is discharged after reaching the standard; thirdly, after adopting the high-efficiency anaerobic and aerobic combined process, the effluent is subjected to advanced treatment and is discharged after reaching the standard.
According to the sewage treatment operation condition of the existing abamectin production enterprises and the research results of abamectin wastewater treatment technologies at home and abroad: the existing abamectin wastewater treatment technology can meet the secondary standard of Integrated wastewater discharge Standard (GB 8978-1996). However, the residual abamectin has high titer and organic solvent, and the concentration of organic matters is too high, so that the retention time is long, the investment cost is high, and the higher effluent requirement cannot be met, so that the treatment effect is not particularly ideal on the whole.
In view of the above, the inventor of the present application has made intensive studies to obtain a zero-emission treatment process for abamectin production wastewater.
Disclosure of Invention
The invention aims to provide a zero-emission treatment process for abamectin production wastewater, which can achieve a good harmless treatment effect and can reduce the production water cost.
The technical purpose of the invention is realized by the following technical scheme:
a zero-emission treatment process for abamectin production wastewater comprises the following steps:
(1) Collecting waste water generated in the production process of the biological pesticide abamectin into an adjusting tank, adjusting the water quality and the water quantity of the waste water, and adjusting the pH value of the waste water to 6-7 by using acid liquor or alkali liquor;
(2) Sending the wastewater with stable water quality and water quantity into an evaporator for evaporation and concentration;
(3) Sending the concentrated solution obtained by evaporation into a dryer for drying, burning the solid material obtained after drying, and sending the condensate obtained by evaporation into an intermediate water tank;
(4) After the water quality and the water quantity are stable, sending the condensate of the middle water tank into a UASB reactor;
(5) Sending the effluent after the UASB anaerobic reaction into a sedimentation tank for sludge-water separation;
(6) The sludge enters a sludge concentration tank, and the effluent of a sedimentation tank enters a hydrolysis acidification tank;
(7) The effluent of the hydrolysis acidification tank is sent into a biochemical tank, and passes through an anoxic tank and an aerobic tank in turn in the biochemical tank;
(8) The effluent of the biochemical tank is sent into an MBR membrane tank for sludge-water separation;
(9) Feeding the effluent of the MBR membrane tank into a reverse osmosis system, and feeding sludge into a sludge concentration tank;
(10) Feeding the reduced membrane concentrated water into an evaporator for evaporation and desalination;
(11) And (4) sending the evaporated condensate water into the biochemical pool in the step (7), and recovering the evaporated crystal.
In a preferred embodiment, the evaporation concentration process in the step (2) is performed by using a four-effect evaporator, and the evaporation desalination process in the step (10) is performed by using a three-effect evaporator.
In a preferred embodiment, the MBR membrane tank in the step (8) adopts hollow fiber membranes.
In a preferred embodiment, the reverse osmosis system in the step (9) comprises a first-stage reverse osmosis and a second-stage high-pressure reverse osmosis, wherein the first-stage reverse osmosis adopts an anti-pollution roll-type composite structure membrane element which comprises a polyamide material ultrathin separation layer, a polysulfone material porous middle support layer and a polyester material reinforced non-woven fabric arranged from top to bottom. The second-stage high-pressure reverse osmosis is carried out by adopting a disc-tube membrane column.
In a preferred embodiment, the dryer in step (3) includes a material collecting box, a material tank and a roller assembly, the roller assembly includes a scraping plate, a supporting frame, a driving device, a steam delivery pipe and a roller body, the roller body includes a first side plate, a second side plate and a roller body, the first side plate and the second side plate are arranged oppositely, a side of the first side plate opposite to the second side plate is provided with a plurality of first slots with uniformly distributed circumferences, a first spring is arranged in the first slots, a side of the second side plate opposite to the first side plate is provided with a plurality of second slots with uniformly distributed circumferences, a second spring is arranged in the second slots, the roller body includes a surface layer, a plurality of supporting cross bars and a plurality of molding units, the plurality of supporting cross bars horizontally penetrate through the surface layer, and one end of the supporting cross bar is inserted into the first slots, the shaping unit comprises a flexible sliding rail, a pulley and a connecting rod, the flexible sliding rail is arranged on the inner wall of the surface layer, the pulley is matched with the flexible sliding rail, one end of the connecting rod is connected with the pulley, the other end of the connecting rod is connected with the steam conveying pipe, so that a material taking recess is formed on the surface layer, the steam conveying pipe horizontally penetrates through the first side plate and the second side plate and is fixedly connected with the first side plate and the second side plate, a first bearing and a second bearing are arranged on the supporting frame, the steam conveying pipe penetrates through the first bearing and the second bearing, and the driving device drives the first side plate or the second side plate to rotate, the material collecting box is provided with a material inlet, one side of the scraper is fixed at the material inlet, the other end of the scraper is abutted against the surface layer and inserted into the material taking recess, and the lower part of the surface layer extends into the material pool.
In a preferred embodiment, the supporting frame includes a first supporting plate and a second supporting plate, the first supporting plate is provided with a first bearing hole, the first bearing is disposed in the first bearing hole, the second supporting plate is provided with a second bearing hole, the second bearing is disposed in the second bearing hole, and the first supporting plate and the second supporting plate are fixed on the material tank.
In a preferred embodiment, the driving device includes a first driving motor and a driving wheel, the driving wheel is connected to a driving shaft of the first driving motor, the first side plate and the second side plate are arranged in a circular shape, and a wheel circumference of the driving wheel is tightly attached to an edge of the first side plate or the second side plate for driving the first side plate or the second side plate to rotate.
In a preferred embodiment, the steam conveying pipe is provided with a plurality of steam outlets on the wall surface of the part of the first side plate and the second side plate, and the plurality of steam outlets are uniformly distributed.
In a preferred embodiment, one end of the first spring is welded to the side wall of the first slot, and one end of the second spring is welded to the side wall of the second slot.
In a preferred embodiment, drum assembly still includes the shearing piece, the shearing piece includes first shear plate, second shear plate, first cam, second driving motor and mounting panel, the mounting panel is fixed in on the case that gathers materials, the lateral part of mounting panel is equipped with first settling hole and second settling hole, be equipped with the third spring in the first settling hole, be equipped with the fourth spring in the second settling hole, first shear plate includes first plate body, first picture peg and first ejector pin that supports, first picture peg one end inserts first settling hole back connection the third spring, the other end is connected first plate body, first ejector pin one end is connected keeping away from of first plate body the one end of first picture peg, the other end support the top in on the first cam, the side edge definition of first plate body is first shear edge, be equipped with a plurality of first cutting teeth on the first edge, the second shear plate includes second plate body, second picture peg and second shear pin, the second shear pin one end supports and inserts the side edge is connected to the second cam, the second cam is connected the second shear pin, the second shear pin is connected on the second side edge, the second shear plate body, the second shear pin is connected to the second side edge, the second cam is connected to the second cutting tooth, the second cutting edge is connected to the second plate body, the second cutting edge is connected to the second side edge.
Compared with the prior art, the zero-discharge treatment process for the abamectin production wastewater provided by the invention has the advantages that the water production rate can reach more than 90%, the effluent of the membrane treatment system can meet the standard of the design Specification for treatment of industrial circulating cooling water (GB/T50050-2017), and the process can be used for supplementing water for circulating cooling water. Not only the pollution to the environment is reduced, but also the resource recovery and reutilization can be carried out on the water resource to a certain extent; the ultrafiltration membrane tank adopted in the invention can complete solid-liquid separation with higher efficiency, the effect is better than that of the traditional secondary sedimentation tank, the waste water recycling is more favorably realized, and meanwhile, the process equipment is more centralized, so the occupied area is less.
Drawings
FIG. 1 is a process flow diagram of the zero discharge treatment process of the abamectin production wastewater related to the invention.
Fig. 2 is a schematic structural diagram of a dryer applied in the zero-discharge treatment process of the abamectin production wastewater.
Fig. 3 is a schematic structural diagram of a roller body of a dryer applied to the zero-discharge treatment process of the abamectin production wastewater.
Fig. 4 is a schematic structural diagram of a dryer applied to the zero-emission treatment process of the abamectin production wastewater, wherein the second side plate is removed from a drum body of the dryer.
Fig. 5 is a schematic structural diagram of a dryer applied to the zero-emission treatment process of the abamectin production wastewater, which is provided by the invention, after a second side plate, a surface layer and a plurality of supporting cross rods are removed from a drum body.
Fig. 6 is a schematic diagram of a matching structure of a pulley and a flexible sliding rail of a dryer applied to the zero-discharge treatment process of the abamectin production wastewater.
Fig. 7 is a schematic view of a matching structure of a support cross rod and a first slot of a dryer applied in the zero-discharge treatment process of the abamectin production wastewater.
Fig. 8 is a schematic structural diagram of a shearing part of a dryer applied to the zero-emission treatment process of the abamectin production wastewater, which is provided with a mounting plate removed.
Fig. 9 is an enlarged schematic view of a portion a of fig. 8.
Fig. 10 is an enlarged schematic view of a portion B in fig. 8.
In the drawings
A material collecting box 1; a material tank 2; a squeegee 3; a steam delivery pipe 4; a steam outlet 5; a first side plate 6; a first slot 7; a first spring 8; a second side plate 9; a face layer 10; a material taking recess 11; a support rail 12; a flexible slide rail 13; a pulley 14; a connecting rod 15; a second support plate 16; a first drive motor 17; a drive wheel 18; a first cam 19; a second cam 20; a second drive motor 21; a mounting plate 22; a third spring 23; a first plate body 24; a first sheared edge 25; a first cutting tooth 26; a first board 27; a first abutment bar 28; a second plate body 29; a second cutting edge 30; a second cutting tooth 31; a second board 32; a second ejector pin 33; a fourth spring 34; a shearing member 35.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Example one
As shown in figure 1, the zero-discharge treatment process of the abamectin production wastewater comprises the following steps:
(1) Collecting the filtrate generated in the production process of the biological pesticide abamectin into an adjusting tank, adjusting the water quality and the water quantity, and adjusting the pH value of the wastewater to 6-7 by using acid liquor or alkali liquor;
(2) Wastewater with stable water quality and water quantity is pumped into a four-effect evaporator by a feed pump, and is evaporated by a large-flow forced circulation pump through continuous heating circulation;
(3) The concentrated solution obtained after 10 times of concentration is sent into a dryer for further drying treatment, the solid matter formed after drying is incinerated, and the condensate after evaporation enters an intermediate water pool;
(4) Pumping the condensate into the UASB reactor from the bottom of the UASB reactor after the water quality and the water quantity are stable, participating in anaerobic fermentation of the substrate in the UASB reactor through a plurality of different microorganisms, and converting the substrate into other substances such as methane, carbon dioxide, water and the like;
(5) Enabling effluent after the UASB anaerobic reaction to enter a sedimentation tank for sludge-water separation;
(6) The sludge enters a sludge concentration tank, the effluent of a sedimentation tank enters a hydrolysis acidification tank, and the hydrolysis acidification tank is used for further decomposing high-molecular organic pollutants in the wastewater into small molecules and decomposing refractory substances into easily degradable substances, so that the biodegradability of the wastewater is improved;
(7) The effluent of the hydrolysis acidification tank is sent into a biochemical tank, and then sequentially enters an anoxic tank and an aerobic tank, and pollutants in water are decomposed through activated sludge and a biological membrane, so that COD (chemical oxygen demand) and ammonia nitrogen are reduced;
(8) The effluent of the biochemical pool enters an MBR membrane pool for mud-water separation, in the MBR membrane pool, a large amount of microorganisms exist in a bioreactor, various compounds in the sewage can be decomposed into reproducible products, macromolecular solid wastes which are difficult to decompose are intercepted by a membrane component and then flow back to the front end biochemical pool along with concentrated solution, and the membrane form adopts a hollow fiber membrane; the membrane flux is designed to be 12L/m 2 H, the membrane area of a single membrane module is designed to be 20m 2 。
(9) The effluent of the MBR membrane tank directly enters a reverse osmosis system, the reverse osmosis can further intercept the effluent of the MBR membrane tank, remove various inorganic ions, colloidal substances and small molecular organic matters, ensure that the quality of the effluent reaches the reuse water standard, and the membrane concentrated water enters a concentrated water tank and the sludge enters a sludge concentration tank;
(10) The reduced membrane concentrated water enters a triple-effect evaporator for evaporation and desalination;
(11) The evaporation condensed water of the triple-effect evaporator flows back to the front end biochemical pool, and the evaporation crystal is recovered.
Example two
As shown in figure 1, the zero-discharge treatment process of the abamectin production wastewater comprises the following steps:
(1) Collecting the filtrate generated in the production process of the biological pesticide abamectin into an adjusting tank, adjusting the water quality and the water quantity, and adjusting the pH value of the wastewater to 6-7 by using acid liquor or alkali liquor.
(2) Wastewater with stable water quality and water quantity is pumped into a four-effect evaporator by a feed pump, and is evaporated by a large-flow forced circulation pump through continuous heating circulation;
(3) Concentrating 20 times to obtain concentrated solution, further drying, burning the dried solid, and evaporating the condensate to obtain intermediate water pool.
(4) Pumping the condensate into the UASB reactor from the bottom of the UASB reactor after the water quality and the water quantity are stable, participating in anaerobic fermentation of the substrate in the UASB reactor through a plurality of different microorganisms, and converting the substrate into other substances such as methane, carbon dioxide, water and the like;
(5) Enabling effluent after the UASB anaerobic reaction to enter a sedimentation tank for sludge-water separation;
(6) The sludge enters a sludge concentration tank, the effluent of a sedimentation tank enters a hydrolysis acidification tank, and the hydrolysis acidification tank is used for further decomposing high-molecular organic pollutants in the wastewater into small molecules and decomposing refractory substances into easily degradable substances, so that the biodegradability of the wastewater is improved;
(7) The effluent of the hydrolysis acidification tank is sent into a biochemical tank, and then sequentially enters an anoxic tank and an aerobic tank, and pollutants in water are decomposed through activated sludge and a biological membrane, so that COD (chemical oxygen demand) and ammonia nitrogen are reduced.
(8) Effluent of the biochemical tank enters an MBR (membrane bioreactor) membrane tank for sludge-water separation, in the MBR membrane tank, a large amount of microorganisms exist in the bioreactor, various compounds in sewage can be decomposed into reproducible products, macromolecular solid wastes which are difficult to decompose are intercepted by a membrane component and then flow back to the front end biochemical tank along with concentrated solution, and the membrane form adopts a hollow fiber membrane; the membrane flux is designed to be 12L/m 2 H; the membrane area of a single membrane module is designed to be 20m 2 。
(9) The effluent of the MBR membrane tank directly enters a reverse osmosis system, the reverse osmosis can further intercept the effluent of the MBR membrane tank, various inorganic ions, colloidal substances and small molecular organic matters are removed, the effluent quality is ensured to reach the reuse water standard, membrane concentrated water enters a concentrated water tank, and sludge enters a sludge concentration tank.
(10) And (4) feeding the reduced membrane concentrated water into a triple-effect evaporator for evaporation and desalination.
(11) The evaporation condensed water of the triple-effect evaporator flows back to the front end biochemical pool, and the evaporation crystal is recovered.
EXAMPLE III
As shown in figure 1, the zero-discharge treatment process of the abamectin production wastewater comprises the following steps:
(1) Collecting the filtrate generated in the production process of the biological pesticide abamectin into an adjusting tank, adjusting the water quality and the water quantity, and adjusting the pH value of the wastewater to 6-7 by using acid liquor or alkali liquor;
(2) Wastewater with stable water quality and water quantity is pumped into a four-effect evaporator by a feed pump, and is evaporated by a large-flow forced circulation pump through continuous heating circulation;
(3) Sending the concentrated solution obtained after 30 times of concentration into a dryer for further drying treatment, burning the solid matter formed after drying, and sending the condensate after evaporation into an intermediate water tank;
(4) Pumping the condensate into the UASB reactor from the bottom of the UASB reactor after the water quality and the water quantity are stable, participating in anaerobic fermentation of a substrate in the UASB reactor through a plurality of different microorganisms, and converting the substrate into other substances such as methane, carbon dioxide, water and the like;
(5) Enabling effluent after the UASB anaerobic reaction to enter a sedimentation tank for sludge-water separation;
(6) The sludge enters a sludge concentration tank, the effluent of a sedimentation tank enters a hydrolysis acidification tank, and the hydrolysis acidification tank is used for further decomposing high-molecular organic pollutants in the wastewater into small molecules and decomposing refractory substances into easily degradable substances, so that the biodegradability of the wastewater is improved;
(7) The effluent of the hydrolysis acidification tank is sent into a biochemical tank, and then sequentially enters an anoxic tank and an aerobic tank, and pollutants in water are decomposed through activated sludge and a biological membrane, so that COD (chemical oxygen demand) and ammonia nitrogen are reduced;
(8) The effluent of the biochemical pool enters an MBR membrane pool for mud-water separation, in the MBR membrane pool, a large amount of microorganisms exist in a bioreactor, various compounds in the sewage can be decomposed into reproducible products, macromolecular solid wastes which are difficult to decompose are intercepted by a membrane component and then flow back to the front end biochemical pool along with concentrated solution, and the membrane form adopts a hollow fiber membrane; the membrane flux is designed to be 12L/m 2 H; the membrane area of a single membrane module is designed to be 20m 2 ；
(9) The effluent of the MBR membrane tank directly enters a reverse osmosis system, the reverse osmosis can further intercept the effluent of the MBR membrane tank, various inorganic ions, colloidal substances and small molecular organic matters are removed, the effluent quality is ensured to reach the reuse water standard, membrane concentrated water enters a concentrated water tank, and sludge enters a sludge concentration tank.
(10) And (4) feeding the reduced membrane concentrated water into a triple-effect evaporator for evaporation and desalination.
(11) The evaporation condensate water of the triple-effect evaporator flows back to the front end biochemical pool, and the evaporation crystal is recovered.
Compared with the prior art, the treatment effect is shown in the following table:
as can be seen from the above table, the treatment effect of the scheme is obviously superior to that of the prior art.
In each of the above embodiments, the dryer in step (3) includes a material collecting box 1, a material tank 2, and a roller assembly, where the roller assembly includes a scraper 3, a support frame, a driving device, a steam conveying pipe 4, and a roller body, the roller body includes a first side plate 6, a second side plate 9, and a roller body, the first side plate 6 and the second side plate 9 are disposed opposite to each other, a plurality of first slots 7 uniformly distributed in a circumference are disposed on a side surface of the first side plate 6 opposite to the second side plate 9, a first spring 8 is disposed in the first slot 7, a plurality of second slots uniformly distributed in a circumference are disposed on a side surface of the second side plate 9 opposite to the first side plate 6, a second spring is disposed in the second slot, the roller body includes a surface layer 10, a plurality of support rails 12 and a plurality of molding units, the plurality of support rails 12 horizontally penetrate through the surface layer 10, one end of the support rails 12 is inserted into the first slot 7, the support rails 8 is abutted against in a direction away from a center of the roller body, the other end of the support rails is inserted into the second slots, the second slots are connected to a flexible bearing connecting rod 14, the support rail 14 is connected to the support rail 13, the support rail 14 and the support rail 14, the support rail 14 is connected to the support rail 13, the support rail 13 and the support rail 4, the support rail 14, the support rail 4 and the support rail 14, steam conveying pipe 4 passes first bearing with the second bearing, drive arrangement drive first curb plate 6 or second curb plate 9 rotates, be equipped with the pan feeding mouth on the case 1 that gathers materials, one side of scraper blade 3 is fixed in pan feeding mouth department, the other end support in on the surface course 10, and insert get in the material is sunken 11, the lower part of surface course 10 stretches into in the material pond 2.
When the dryer works, the driving device drives the cylinder to rotate, a surface layer 10 of the cylinder contacts wastewater in the material pool 2 in the rotating process, the wastewater forms a liquid film on the surface layer 10, the steam conveying pipe 4 conveys high-temperature steam into the cylinder, the moisture in the liquid film is quickly evaporated due to the high temperature, the evaporated solid matter is left on the surface layer 10 to form a material film, and the material film is scraped by the scraper 3 when passing through the scraper 3 and enters the material collecting box 1 connected with the scraper 3 to wait for subsequent treatment; because connecting rod 15 restriction, the shape of surface course 10 is restricted to form and is got material sunken 11, when the material membrane should get material sunken 11 through, takes place the bending to cause the material membrane to break, thereby can be more thoroughly scraped off from scraper blade 3.
Specifically, the support frame includes first backup pad and second backup pad 16, be equipped with first bearing hole in the first backup pad, first bearing is located in the first bearing hole, be equipped with the second bearing hole in the second backup pad 16, the second bearing is located in the second bearing hole, first backup pad with second backup pad 16 is fixed in on the material pond 2, the rotation that realizes steam delivery pipe 4 is supported.
Specifically, the driving device includes a first driving motor 17 and a driving wheel 18, the driving wheel 18 is connected to a driving shaft of the first driving motor 17, the first side plate 6 and the second side plate 9 are circular, and a wheel circumference of the driving wheel 18 is tightly attached to an edge of the first side plate 6 or the second side plate 9, so as to drive the first side plate 6 or the second side plate 9 to rotate. When the steam delivery pipe works, the first driving motor 17 drives the driving wheel 18 to rotate, the driving wheel 18 drives the first side plate 6 or the second side plate 9 to rotate, two ends of the supporting transverse rod 12 are respectively inserted into the first slot 7 formed in the first side plate 6 and the second slot formed in the second side plate 9, so that the supporting transverse rods 12 synchronously rotate to drive the surface layer 10 to rotate, the flexible sliding rails 13 synchronously rotate during the rotation of the surface layer 10, the pulleys 14 are located at fixed positions, the positions where the flexible sliding rails 13 are matched with the pulleys 14 generate tensile force, the material taking recesses 11 are generated at corresponding positions of the surface layer 10, meanwhile, the supporting transverse rods 12 corresponding to the material taking recesses 11 are pulled towards the direction close to the steam delivery pipe 4, the first springs 8 and the second springs matched with the supporting transverse rods 12 are compressed, and after the supporting transverse rods 12 pass through the positions of the material taking recesses 11, the supporting transverse rods 12 recover to the positions under the action of the first springs 8 and the second springs.
Specifically, steam conveying pipe 4 is located first curb plate 6 with be equipped with a plurality of steam outlet 5 on the wall of the part of second curb plate 9, a plurality of steam outlet 5 evenly distributed heat surface course 10 through steam, then realize the process of heating.
In order to improve the structural stability, one end of the first spring 8 is welded to the side wall of the first slot 7, and one end of the second spring is welded to the side wall of the second slot.
Specifically, the surface layer 10 and the flexible sliding rail 13 are made of high-temperature-resistant rubber, so that the requirements of flexibility and high temperature resistance are met.
In order to make solid material layer can take off from surface course 10 more easily, drum assembly still includes shearing piece 35, shearing piece 35 includes first shear plate, second shear plate, first cam 19, second cam 20, second driving motor 21 and mounting panel 22, mounting panel 22 is fixed in gather workbin 1 is last, mounting panel 22's lateral part is equipped with first place hole and second place hole, be equipped with third spring 23 in the first place hole, be equipped with fourth spring 34 in the second place hole, first shear plate includes first plate body 24, first picture peg 27 and first top bar 28 that supports, first picture peg 27 one end inserts first place hole back-connect third spring 23, the other end is connected first plate body 24, first top bar 28 one end is connected keeping away from of first plate body 24 the one end of first picture peg 27, the other end supports in first cam 19, a side edge definition of first plate body 24 is first shear edge 25, first shear edge 25 is sheared edge 25, second shear edge 25 is equipped with second cutting edge 30 and second cutting edge 32, second edge 30 is connected on the second side edge 30, second side edge 32 is connected to second picture peg 29, second side edge 32 is connected to second picture peg 30, second edge 32 is connected to second picture peg 33, second picture peg 30 is connected to the second picture peg 33, the first cam 19 and the second cam 20 are both connected to a drive shaft of the second drive motor 21.
Under the above structure, when the second driving motor 21 drives, the first cam 19 and the second cam 20 are driven to rotate, and the first abutting rod 28 and the second abutting rod 33 are abutted, so that the first plate body 24 and the second plate body 29 continuously reciprocate, in the reciprocating process, the first cutting teeth 26 and the second cutting teeth 31 are matched with each other to achieve the shearing effect, and disperse the solid material layer from the surface layer 10, so that the solid material layer can be scraped from the surface layer 10 by the scraper 3 more favorably, in the above working process, the third spring 23 and the fourth spring 34 provide an abutting force, so that the first abutting rod 28 and the second abutting rod 33 firmly abut against the wheel circumferences of the first cam 19 and the second cam 20, respectively.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrases "comprising … …" or "comprising … …" does not exclude the presence of additional elements in a process, method, article, or terminal that comprises the element. Further, herein, "greater than," "less than," "more than," and the like are understood to exclude the present numbers; the terms "above", "below", "within" and the like are to be understood as including the present number.
The foregoing description of the embodiments is provided to facilitate an understanding and use of the invention and it will be apparent to those skilled in the art that various modifications to the embodiments and the generic principles defined herein may be applied to other embodiments without the use of inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (9)
1. A zero-emission treatment process for abamectin production wastewater is characterized by comprising the following steps:
(1) Collecting wastewater generated in the production process of the biological pesticide abamectin into an adjusting tank, adjusting the water quality and the water quantity, and simultaneously adjusting the pH value of the wastewater to 6-7 by using acid liquor or alkali liquor;
(2) Feeding the wastewater with stable water quality and water quantity into an evaporator for evaporation and concentration;
(3) Sending the concentrated solution obtained by evaporation into a dryer for drying, burning the solid material obtained after drying, and sending the condensate obtained by evaporation into an intermediate water tank;
(4) After the water quality and the water quantity are stable, sending the condensate of the middle water tank into a UASB reactor;
(5) Sending the effluent after the UASB anaerobic reaction into a sedimentation tank for sludge-water separation;
(6) The sludge enters a sludge concentration tank, and the effluent of a sedimentation tank enters a hydrolysis acidification tank;
(7) The effluent of the hydrolysis acidification tank is sent into a biochemical tank, and passes through an anoxic tank and an aerobic tank in turn in the biochemical tank;
(8) The effluent of the biochemical tank is sent into an MBR membrane tank for sludge-water separation;
(9) Feeding the effluent of the MBR membrane tank into a reverse osmosis system, and feeding sludge into a sludge concentration tank;
(10) Feeding the reduced membrane concentrated water into an evaporator for evaporation desalination;
(11) Sending the evaporated condensate water into the biochemical pool in the step (7), and recovering evaporated crystals;
the dryer in the step (3) comprises a material collecting box, a material pool and a roller assembly, wherein the roller assembly comprises a scraping plate, a support frame, a driving device, a steam conveying pipe and a roller body, the roller body comprises a first side plate, a second side plate and a roller body, the first side plate and the second side plate are arranged oppositely, a plurality of first slots with uniformly distributed circumferences are arranged on the side surface of the first side plate opposite to the second side plate, a first spring is arranged in each first slot, a plurality of second slots with uniformly distributed circumferences are arranged on the side surface of the second side plate opposite to the first side plate, a second spring is arranged in each second slot, the roller body comprises a surface layer, a plurality of supporting transverse rods and a plurality of molding units, the plurality of supporting transverse rods horizontally penetrate through the surface layer, one ends of the supporting transverse rods are inserted into the first slots, the first spring is used for supporting the first side plate or the second side plate in the direction far away from the center of the cylinder body, the other end of the first spring is inserted into the second slot, the second spring is used for supporting the second side plate in the direction far away from the center of the cylinder body, the molding unit comprises a flexible slide rail, a pulley and a connecting rod, the flexible slide rail is arranged on the inner wall of the surface layer, the pulley is matched with the flexible slide rail, one end of the connecting rod is connected with the pulley, the other end of the connecting rod is connected with the steam conveying pipe, so that a material taking recess is formed on the surface layer, the steam conveying pipe horizontally penetrates through the first side plate and the second side plate and is fixedly connected with the first side plate and the second side plate, a first bearing and a second bearing are arranged on the supporting frame, the steam conveying pipe penetrates through the first bearing and the second bearing, and the driving device drives the first side plate or the second side plate to rotate, the material collecting box is provided with a material inlet, one side of the scraper is fixed at the material inlet, the other end of the scraper is abutted against the surface layer and inserted into the material taking recess, and the lower part of the surface layer extends into the material pool.
2. The abamectin production wastewater zero-emission treatment process according to claim 1, wherein the evaporation concentration process in the step (2) is performed by using a four-effect evaporator, and the evaporation desalination process in the step (10) is performed by using a three-effect evaporator.
3. The zero discharge treatment process of abamectin production wastewater according to claim 1, wherein the MBR membrane tank in the step (8) adopts a hollow fiber membrane.
4. The abamectin production wastewater zero-emission treatment process according to claim 1, wherein the reverse osmosis system in the step (9) comprises a primary reverse osmosis system and a secondary high-pressure reverse osmosis system, the primary reverse osmosis system adopts an anti-pollution roll-type composite structure membrane element and comprises a polyamide material ultrathin separation layer, a polysulfone material porous middle support layer and a polyester material reinforced non-woven fabric which are arranged from top to bottom, and the secondary high-pressure reverse osmosis system is carried out by adopting a disc-tube type membrane column.
5. The abamectin production wastewater zero-emission treatment process according to claim 1, wherein the support frame comprises a first support plate and a second support plate, the first support plate is provided with a first bearing hole, the first bearing is arranged in the first bearing hole, the second support plate is provided with a second bearing hole, the second bearing is arranged in the second bearing hole, and the first support plate and the second support plate are fixed on the material tank.
6. The abamectin production wastewater zero-emission treatment process according to claim 1, wherein the driving device comprises a first driving motor and a driving wheel, the driving wheel is connected with a driving shaft of the first driving motor, the first side plate and the second side plate are circular, and the periphery of the driving wheel is tightly attached to the edge of the first side plate or the edge of the second side plate and used for driving the first side plate or the second side plate to rotate.
7. The abamectin production wastewater zero-emission treatment process according to claim 1, wherein the steam delivery pipe is provided with a plurality of steam outlets on the wall surface of the part of the first side plate and the second side plate, and the plurality of steam outlets are uniformly distributed.
8. The abamectin production wastewater zero-emission treatment process according to claim 1, wherein one end of the first spring is welded to the side wall of the first slot, and one end of the second spring is welded to the side wall of the second slot.
9. The abamectin production wastewater zero-discharge treatment process according to claim 1, which is characterized in that, the roller assembly further comprises a shearing piece, the shearing piece comprises a first shearing plate, a second shearing plate, a first cam, a second driving motor and a mounting plate, the mounting plate is fixed on the material collecting box, a first placing hole and a second placing hole are arranged on the side part of the mounting plate, the first placing hole is internally provided with a third spring, the second placing hole is internally provided with a fourth spring, the first shear plate comprises a first plate body, a first inserting plate and a first propping rod, one end of the first inserting plate is inserted into the first placing hole and then connected with the third spring, the other end of the first inserting plate is connected with the first plate body, one end of the first abutting rod is connected with one end of the first plate body far away from the first inserting plate, the other end abuts against the first cam, one side edge of the first plate body is defined as a first shearing edge, a plurality of first cutting teeth are arranged on the first shearing edge, the second shear plate comprises a second plate body, a second inserting plate and a second propping rod, one end of the second inserting plate is inserted into the second placing hole and then connected with the fourth spring, the other end of the second inserting plate is connected with the second plate body, one end of the second abutting rod is connected with one end of the second plate body far away from the second inserting plate, the other end abuts against the second cam, one side edge of the second plate body is defined as a second shearing edge, a plurality of second cutting teeth are arranged on the second shearing edge, the first shearing edge and the second shearing edge are mutually attached, and contacts the upper edge of the material taking recess, and the first cam and the second cam are both connected with a driving shaft of the second driving motor.
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