CN115215482A - Novel coking wastewater oil removing process - Google Patents

Abstract

The invention relates to the technical field of coking wastewater oil removal processes, in particular to a novel coking wastewater oil removal device and a novel coking wastewater oil removal process. According to the invention, through the idea of semi-coke wastewater pre-precipitation, separable suspended matters in wastewater are removed in advance, the influence of the suspended matters on subsequent demulsification is reduced, the effluent oil content is reduced, the removal rate is improved on the basis of the traditional process, the process is simplified, a polymer filter is omitted, the equipment investment is reduced, less equipment is required on the whole, the maintenance is convenient, the equipment operation and maintenance personnel are reduced, the operation cost is reduced, the demulsification is realized by pretreating waste liquid and changing the acid-base property of the wastewater by using other substances, the consumption of a solvent during extraction is reduced, and the practicability is improved.

Description

Novel coking wastewater oil removal process

Technical Field

The invention relates to a novel coking wastewater oil removal process, in particular to a novel coking wastewater oil removal device and an oil removal process, and belongs to the technical field of coking wastewater oil removal processes.

Background

Based on the energy source endowment of poor oil, rich coal and little gas in China and the development requirements of economic society, in a long period in the future, the position of coal as a leading energy source cannot be changed, the efficient and clean utilization of coal has great strategic significance, the total energy of semicoke in China can be 1 hundred million tons/year at present, the traditional semi-coke process adopts water for coke quenching, the process is simple and backward, the semi-coke moisture cannot be controlled, further drying is needed to reduce the moisture, and the water resource consumption is high;

the technology starts with demulsification and gravity settling, and creates a set of full-flow process by combining the phenomenon that semi-coke wastewater is wrapped with oil, thoroughly solves the current situation that semi-coke wastewater is difficult to separate oil and dust, and creates favorable conditions for subsequent ammonia distillation, dephenolization, biochemical treatment and reclaimed water reuse;

the objective disadvantages of the prior art:

(1) The traditional process adopts a mode of gravity settling and poly-clean filtration and is difficult to realize demulsification and separation;

(2) The physical properties of oil dust are not changed, the oil is dissolved in water, and gravity settling separation is not thorough;

therefore, it is highly desirable to improve the degreasing process of the coking wastewater to solve the above existing problems.

Disclosure of Invention

The invention aims to provide a novel coking wastewater oil removal device and an oil removal process, raw material wastewater is pressurized and then sent to an integrated oil remover, the device is provided with a chemical adding coagulation sedimentation device, the gravity sedimentation retention time is 48 hours, large-particle suspended matters in the wastewater are pre-precipitated, precipitated clear water enters an oil precipitation tank, the water tank structurally combines the air flotation process principle, the process that nitrogen is used in the original air flotation is changed, the wastewater treated by the oil precipitation tank is further lifted to a sedimentation tank, the height of a water inlet pipe and a water outlet is adjusted on the design of the original sedimentation tank, the influence of water inlet disturbance on the gravity sedimentation is reduced, and the phenomenon that the effluent has no weir dam and deposited oil dust is extracted is ensured.

In order to achieve the purpose, the invention adopts the main technical scheme that:

a novel coking wastewater oil removal device comprises an integrated oil remover, an oil separation tank and a settling tank, wherein a raw material wastewater liquid inlet pipe is arranged at the left end of the integrated oil remover, a booster pump is installed at one end, away from the integrated oil remover, of the raw material wastewater liquid inlet pipe, a flow dividing pipe is fixedly installed in the integrated oil remover in a manner that the right end of the raw material wastewater liquid inlet pipe extends into the integrated oil remover, a liquid outlet is formed in the surface of the flow dividing pipe, a liquid pumping port is formed in the side edge of the upper end of the integrated oil remover, an air floatation mechanism is arranged on the inner side of the oil separation tank, oil receiving grooves are formed in the left end and the right end of the oil separation tank, an oil scraping mechanism is arranged at the upper end of the inner side of the oil separation tank, a sewage discharge port is formed in the front side of the lower end of the settling tank, a water inlet pipe is arranged at the upper end of the inner side of the settling tank, and a water outlet is formed in the side edge of the upper end of the settling tank;

through above technical scheme, carry out the preliminary sedimentation to blue charcoal waste water through integration degreaser, get rid of separable suspended solid in the waste water in advance, reduce the influence of suspended solid to follow-up breakdown of emulsion to thereby waste water after the preliminary sedimentation is extracted and gets into the oil analysis pond, thereby utilizes all the other materials to change waste water acid and alkaline and realize the breakdown of emulsion, improves the efficiency and the benefit of deoiling, when sending into the settling cask at last, utilizes the transformation to the settling cask inlet outlet, increases gravity settling efficiency.

Preferably, a settling funnel is arranged at the lower end of the integrated oil remover, a light oil receiving port and a heavy oil receiving port are respectively arranged on the left side and the right side of the rear end of the integrated oil remover, and a dosing box is arranged at the front end of the integrated oil remover.

Preferably, the liquid pumping ports are distributed at equal intervals, and the liquid pumping ports are communicated with the oil separating pool through pipelines;

through above technical scheme, integration degreaser adopts the technology of adding medicine coagulating sedimentation preliminary treatment, when using, carries out synchronous medicine work of adding through the dosing tank, with separable suspended solid preliminary treatment in the waste water, ensures the thoroughness of follow-up technology breakdown of emulsion, the clean technology of gathering, simultaneously, sets up light oil, heavy oil on integration degreaser and receives the hydraulic fluid port, can retrieve the different density of oil content of output, has improved the practicality.

Preferably, the air floating mechanism comprises a main pipe, connecting branch pipes, air outlet holes, an air inlet pipe and an air outlet pipe, the main pipe is installed on the inner side of the oil separating pool, the connecting branch pipes are fixedly installed on the front side and the rear side of the main pipe, the branch pipes are fixedly connected to one ends, far away from the main pipe, of the connecting branch pipes, the air outlet holes are formed in the surfaces of the main pipe and the branch pipes, and the air inlet pipe and the air outlet pipe are fixedly installed on the front side and the rear side of the right end of the main pipe respectively;

preferably, the connecting branch pipes are distributed at equal intervals, the branch pipes and the main pipe are communicated with each other through the connecting branch pipes, and the air outlet holes are distributed at equal intervals;

through above technical scheme, send into sour lime set, ammonia lime set in to being responsible for through the intake pipe to change quality of water PH, the oil drop demulsification that will dissolve in aqueous, carbon dioxide, the hydrogen sulfide that the venthole discharge ammonia still produced simultaneously gather the oil drop after the demulsification clean, make it increase and subside the realization separation for large granule material accessible gravity.

Preferably, the oil scraping mechanism comprises a linear motor, a connecting block and a scraper plate, the linear motor is fixedly mounted on the side of the top of the oil precipitation tank, the connecting block is fixedly connected to the output end of the linear motor, and the scraper plate is arranged at the lower end of the connecting block;

preferably, the linear motors are symmetrically arranged at the front side and the rear side of the oil separating pool, the front end and the rear end of the scraper are fixedly connected with the connecting block respectively, and the width of the connecting block is matched with the width of the inner side of the oil separating pool;

through above technical scheme, be provided with the frizing mechanism at the pond top, during the use, linear electric motor drives the connecting block and removes for the scraper blade is located the inboard of oil separating pond upper end and removes, and convenient regular will gather clean oil recovery.

Preferably, the water inlet pipes are communicated with each other through pipelines, the pipelines are provided with delivery pumps, and the water outlet ends of the water inlet pipes extend into the settling tank and are positioned at the 2 m high position of the tank bottom;

through above technical scheme, the setting pot leads to gathering tank bottoms 2 meters department from the jar with the inlet tube, realize that the quiet stream of water gets into in the jar, increase the time that water rises naturally, thereby increase the time of aquatic small molecule goods and materials mutual contact, further promote and gather clean efficiency, rivers are fast to be slowed down simultaneously, avoid rivers impact bottom deposit, lead to gravity to subside inefficacy, with delivery port setting in top department, guarantee the effective dwell time of water in the jar promptly, it is clean thorough also to ensure to go out water simultaneously, the tank bottoms portion sets up the drain, the sedimentary mud discharge system in bottom is regularly discharged in the blowdown, the clearance of the setting pot of being convenient for.

The utility model provides a novel coking wastewater deoiling device's deoiling technology which characterized in that: the method comprises the following steps:

s1: the raw material wastewater is pressurized by a booster pump and then is sent into an integrated oil remover, the integrated oil remover is added with medicine through a medicine adding box for coagulating sedimentation, and the large-particle suspended matters in the wastewater are pre-precipitated after the gravity sedimentation retention time is short.

S2: the clear water after the sediment is taken out through the drawing liquid mouth to send into the oil separating tank, utilize the air supporting mechanism who sets up for the oil separating tank combines air supporting technology principle, breaks the breakdown of emulsion and gathers into macromolecule with dissolving oil in the waste water.

S3: the collected oil is periodically recovered by an oil scraping mechanism.

S4: and pumping the waste liquid in the oil separating tank out by using a delivery pump, conveying the waste liquid into a settling tank for gravity settling, then preparing clear water after oil removal from a water outlet, and discharging sludge deposited at the bottom through a sewage discharge outlet.

The invention has at least the following beneficial effects:

1. the theory of semi-coke wastewater pre-precipitation removes separable suspended matters in the wastewater in advance, reduces the influence of the suspended matters on subsequent demulsification, reduces the content of effluent oil, and improves the removal rate on the basis of the traditional process.

2. The process is simplified, a polymer filter is omitted, and the equipment investment is reduced.

3. Through the pretreatment of the waste liquid and the utilization of other substances to change the pH value of the waste water, the demulsification is realized, the consumption of a solvent during extraction is reduced, and the practicability is improved.

4. The whole equipment requirement is less, the maintenance is convenient, the equipment operation and maintenance personnel are reduced, and the operation cost is reduced.

5. The method has the advantages that the characteristics of low ash content, high volatile matter, ultra-low sulfur, ultra-low phosphorus and high heat value of local coal are utilized, oil products and chemicals with high added values are produced through a series of environmentally-friendly, reliable and innovative technologies, the added value of the coal is improved, the environmental pollution is reduced, the graded and quality-divided utilization of the low-rank coal is realized, the circular economy is formed, the method accords with the industry policy encouraged by the country, the local resource advantage is changed into the industrial advantage and the economic advantage, and the method has good economic benefit, environmental protection benefit and social benefit.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic top view of the integrated oil eliminator of the present invention;

FIG. 3 is a schematic top view of the oil separating tank of the present invention;

FIG. 4 is a schematic elevation view of a settling tank of the present invention;

FIG. 5 is a schematic view of the internal structure of the oil separator of the present invention.

In the figure, 1, an integrated oil remover; 101. a raw material wastewater inlet pipe; 102. a shunt tube; 103. a liquid outlet; 104. a liquid extraction port; 105. a settling funnel; 106. a light oil receiving port; 107. a heavy oil receiving port; 108. a dosing box; 2. an oil separating pool; 201. an oil receiving tank; 3. a settling tank; 301. a sewage draining outlet; 302. a water inlet pipe; 303. a water outlet; 4. an air floatation mechanism; 401. a main tube; 402. connecting branch pipes; 403. pipe distribution; 404. an air outlet; 405. an air inlet pipe; 406. an air outlet pipe; 5. an oil scraping mechanism; 501. a linear motor; 502. connecting blocks; 503. a scraper.

Detailed Description

The embodiments of the present application will be described in detail with reference to the drawings and examples, so that how to implement the technical means for solving the technical problems and achieving the technical effects of the present application can be fully understood and implemented.

As shown in fig. 1 to 5, the novel coking wastewater oil removal device provided in this embodiment includes an integrated oil remover 1, an oil separation tank 2 and a settling tank 3, a raw wastewater inlet pipe 101 is disposed at a left end of the integrated oil remover 1, a booster pump is disposed at an end of the raw wastewater inlet pipe 101 away from the integrated oil remover 1, a shunt pipe 102 is fixedly disposed at a right end of the raw wastewater inlet pipe 101 extending into the integrated oil remover 1, a liquid outlet 103 is disposed on a surface of the shunt pipe 102, a liquid suction port 104 is disposed at a side of an upper end of the integrated oil remover 1, an air flotation mechanism 4 is disposed at an inner side of the oil separation tank 2, oil collection tanks 201 are disposed at left and right ends of the oil separation tank 2, an oil scraping mechanism 5 is disposed at an inner side of the oil separation tank 2, a drain 301 is disposed at a front side of a lower end of the settling tank 3, a water inlet pipe 302 is disposed at an upper end of the settling tank 3, a water outlet 303 is disposed at an upper end of the settling tank 3.

In the present embodiment, as shown in fig. 1 and 2, a settling funnel 105 is provided at the lower end of the integrated oil eliminator 1, a light oil receiving port 106 and a heavy oil receiving port 107 are provided at the left and right sides of the rear end of the integrated oil eliminator 1, respectively, a dosing tank 108 is provided at the front end of the integrated oil eliminator 1, and a chemical is added to the integrated oil eliminator 1 through the dosing tank 108 to realize coagulation sedimentation and pre-precipitate large suspended solids in wastewater, and the light oil receiving port 106 and the heavy oil receiving port 107 are provided in the oil eliminator, so that the produced oil can be recovered at different densities.

In this embodiment, as shown in fig. 1 and fig. 2, the liquid pumping ports 104 are distributed at equal intervals, the liquid pumping ports 104 are communicated with the oil separating tank 2 through pipelines, and pre-precipitated wastewater is conveniently pumped through the liquid pumping ports 104 and sent into the oil separating tank 2.

In this embodiment, as shown in fig. 1, 3 and 5, the air flotation mechanism 4 includes a main pipe 401, a connecting branch pipe 402, branch pipes 403, air outlets 404, an air inlet pipe 405 and an air outlet pipe 406, the main pipe 401 is installed inside the oil separation tank 2, the connecting branch pipes 402 are fixedly installed on the front and rear sides of the main pipe 401, the branch pipe 403 is fixedly connected to one end of the connecting branch pipe 402 far away from the main pipe 401, the air outlets 404 are respectively opened on the surfaces of the main pipe 401 and the branch pipe 403, the air inlet pipe 405 and the air outlet pipe 406 are respectively fixedly installed on the front and rear sides of the right end of the main pipe 401, and the air inlet pipe 405 is connected to the ammonia distillation dephenolizing tower, so that carbon dioxide and hydrogen sulfide generated by ammonia distillation are sent to the oil separation tank 2, thereby demulsifying the waste liquid is realized, and the oil drops after demulsifying are accumulated and are increased to large particulate matters, and can be separated through gravity settling.

In this embodiment, as shown in fig. 1, 3 and 5, the connecting branch pipes 402 are distributed at equal intervals, the branch pipes 403 and the main pipe 401 are communicated with each other through the connecting branch pipes 402, and the gas outlets 404 are distributed at equal intervals, so as to facilitate the injection of gas into the wastewater.

In this embodiment, as shown in fig. 5, the oil scraping mechanism 5 includes a linear motor 501, a connecting block 502 and a scraper 503, the linear motor 501 is fixedly mounted on the side of the top of the oil precipitation tank 2, the connecting block 502 is fixedly connected to the output end of the linear motor 501, the scraper 503 is arranged at the lower end of the connecting block 502, and the scraper 503 is arranged at the top of the tank, so that the scraper 503 is driven by the linear motor 501 to move, and the collected and cleaned oil is periodically recovered.

In this embodiment, as shown in fig. 5, two linear motors 501 are symmetrically arranged on the front and rear sides of the oil separating pool 2, the front and rear ends of the scraper 503 are respectively fixedly connected with the connecting block 502, the width of the connecting block 502 is matched with the width of the inner side of the oil separating pool 2, the linear motors 501 drive the connecting block 502 to move, so that the scraper 503 is located on the inner side of the upper end of the oil separating pool 2 to move left and right, and the collected and cleaned oil is conveniently and periodically recovered.

In this embodiment, as shown in fig. 4, inlet tube 302 is through pipeline and 2 switch-ons each other, and install the delivery pump on the pipeline, the play water end of inlet tube 302 extends to in the settling cask 3, and be located 2 meters eminences at the tank bottoms, settling cask 3 leads inlet tube 302 to gathering tank bottoms 2 meters department from the jar, realize the hydrostatic flow and get into in the jar, increase the time that the water rises naturally, thereby increase the time of the contact each other of aquatic small molecule goods and materials, further promote and gather clean efficiency, the while rivers are fast to be slowed down absolutely, avoid rivers to strike bottom deposit, lead to gravity to subside inefficacy, and set up delivery port 303 in top department, guarantee the effective dwell time of water in the jar promptly, also guarantee simultaneously that the play water is clean thoroughly.

An oil removing process of a novel coking wastewater oil removing device comprises the following steps:

s1: the raw material wastewater is pressurized by a booster pump and then sent into the integrated oil remover 1, the integrated oil remover 1 is added with the medicine through a medicine adding box 108 for coagulating sedimentation, the gravity sedimentation stays for 48 hours, and large-particle suspended matters in the wastewater are pre-precipitated.

S2: the clear water after the precipitation is pumped out through the liquid pumping port 104 and is sent into the oil separating tank 2, and the oil separating tank 2 is combined with the air flotation process principle by utilizing the arranged air flotation mechanism 4 to break the dissolved oil in the wastewater into macromolecules and gather the dissolved oil into macromolecules.

S3: the collected oil is periodically recovered by the oil scraping mechanism 5.

S4: and pumping the waste liquid in the oil separating tank 2 by using a delivery pump, conveying the waste liquid into a settling tank 3 for gravity settling, then preparing clear water after oil removal from a water outlet 303, and discharging sludge deposited at the bottom through a sewage outlet 301.

As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to achieve the technical effect basically.

It is noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrases "comprising one of 8230; \8230;" 8230; "does not exclude the presence of additional like elements in articles of commerce or systems in which the element is comprised.

The foregoing description shows and describes several preferred embodiments of the invention, but as aforementioned, it is to be understood that the invention is not limited to the forms disclosed herein, and is not to be construed as excluding other embodiments, and that the invention is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (9)

1. The utility model provides a novel coking wastewater deoiling device, includes integration degreaser (1), precipitation tank (2) and settling cask (3), its characterized in that, the left end of integration degreaser (1) is provided with raw materials waste water feed liquor pipe (101), the one end that integration degreaser (1) was kept away from in raw materials waste water feed liquor pipe (101) is installed the booster pump, fixed mounting has shunt tubes (102) in the right-hand member of raw materials waste water feed liquor pipe (101) extends to integration degreaser (1), the surface of shunt tubes (102) is provided with liquid outlet (103), the avris of integration degreaser (1) upper end is provided with drawing liquid mouth (104), the inboard of precipitation tank (2) is provided with air supporting mechanism (4), both ends all are provided with oil receiving groove (201) about precipitation tank (2), the inboard upper end of precipitation tank (2) is provided with scraping oil mechanism (5), the front side of settling cask (3) lower extreme is provided with drain (301), the inboard upper end of settling cask (3) is provided with inlet tube (302), settling cask (3) upper end is provided with delivery port (303).

2. The novel coking wastewater oil removing device according to claim 1, characterized in that: the integrated oil remover is characterized in that a settling funnel (105) is arranged at the lower end of the integrated oil remover (1), a light oil receiving port (106) and a heavy oil receiving port (107) are respectively arranged on the left side and the right side of the rear end of the integrated oil remover (1), and a dosing box (108) is arranged at the front end of the integrated oil remover (1).

3. The novel coking wastewater oil removing device according to claim 1, characterized in that: the liquid pumping ports (104) are distributed at equal intervals, and the liquid pumping ports (104) are communicated with the oil separating pool (2) through pipelines.

4. The novel coking wastewater oil removing device according to claim 1, characterized in that: air supporting mechanism (4) are including being responsible for (401), connecting branch pipe (402), be in charge of (403), venthole (404), intake pipe (405) and outlet duct (406), the inboard of oil analysis pond (2) is installed and is responsible for (401), the equal fixed mounting in both sides has connecting branch pipe (402) around being responsible for (401), the one end fixedly connected with who is responsible for (401) is kept away from in connecting branch pipe (402) and is in charge of (403), venthole (404) have all been seted up on the surface of being responsible for (401) and being in charge of (403), it has intake pipe (405) and outlet duct (406) to be responsible for both sides difference fixed mounting of (401) right-hand member.

5. The novel coking wastewater oil removing device according to claim 4, characterized in that: the connecting branch pipes (402) are distributed at equal intervals, the branch pipes (403) and the main pipe (401) are communicated with each other through the connecting branch pipes (402), and the air outlet holes (404) are distributed at equal intervals.

6. The novel coking wastewater oil removing device according to claim 1, characterized in that: frizing mechanism (5) include linear electric motor (501), connecting block (502) and scraper blade (503), the avris fixed mounting at oil separating pool (2) top has linear electric motor (501), the output fixedly connected with connecting block (502) of linear electric motor (501), the lower extreme of connecting block (502) is provided with scraper blade (503).

7. The novel coking wastewater oil removing device according to claim 6, characterized in that: two linear motors (501) are symmetrically arranged on the front side and the rear side of the oil separating pool (2), the front end and the rear end of the scraper (503) are fixedly connected with the connecting block (502), and the width of the connecting block (502) is matched with the width of the inner side of the oil separating pool (2).

8. The novel coking wastewater oil removing device according to claim 1, characterized in that: the inlet tube (302) is through pipeline and (2) intercommunication each other, and installs the delivery pump on the pipeline, the play water end of inlet tube (302) extends to in settling cask (3), and is located 2 meters eminences in the tank bottoms.

9. The utility model provides a novel coking wastewater deoiling device's deoiling technology which characterized in that: the method comprises the following steps:

s1: the raw material wastewater is pressurized by a booster pump and then is sent into an integrated oil remover (1), the integrated oil remover (1) is added with a medicament through a medicament adding box (108) for coagulating sedimentation, and large-particle suspended matters in the wastewater are pre-precipitated after the retention time of gravity sedimentation is 48 hours.

S2: the clear water after the precipitation is pumped out through the liquid pumping port (104) and is sent into the oil separating tank (2), and the oil separating tank (2) is enabled to be combined with the air flotation process principle by utilizing the arranged air flotation mechanism (4), so that the dissolved oil in the wastewater is demulsified and aggregated into macromolecules.

S3: the collected oil is periodically recovered by an oil scraping mechanism (5).

S4: and pumping the waste liquid in the oil separating tank (2) by using a delivery pump, conveying the waste liquid into a settling tank (3), performing gravity sedimentation, then preparing clear water after oil removal from a water outlet (303), and discharging sludge deposited at the bottom through a sewage outlet (301).

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