CN113044948B - Anti-blocking desalting device and desalting method - Google Patents
Anti-blocking desalting device and desalting method Download PDFInfo
- Publication number
- CN113044948B CN113044948B CN201911390228.5A CN201911390228A CN113044948B CN 113044948 B CN113044948 B CN 113044948B CN 201911390228 A CN201911390228 A CN 201911390228A CN 113044948 B CN113044948 B CN 113044948B
- Authority
- CN
- China
- Prior art keywords
- shell
- wastewater
- height
- hollow cylinder
- salt
- 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.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000011033 desalting Methods 0.000 title claims description 14
- 239000002351 wastewater Substances 0.000 claims abstract description 53
- 238000010612 desalination reaction Methods 0.000 claims abstract description 32
- 150000003839 salts Chemical class 0.000 claims abstract description 26
- 239000007788 liquid Substances 0.000 claims abstract description 20
- 239000002245 particle Substances 0.000 claims description 64
- 239000007787 solid Substances 0.000 claims description 54
- 239000007789 gas Substances 0.000 claims description 26
- 238000006243 chemical reaction Methods 0.000 claims description 16
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 238000009792 diffusion process Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- 239000008188 pellet Substances 0.000 claims description 5
- 238000010992 reflux Methods 0.000 claims description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 239000013078 crystal Substances 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 3
- 239000012071 phase Substances 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 239000007790 solid phase Substances 0.000 claims description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 2
- 238000005498 polishing Methods 0.000 claims description 2
- 230000008929 regeneration Effects 0.000 claims description 2
- 238000011069 regeneration method Methods 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- 230000003139 buffering effect Effects 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 229910001868 water Inorganic materials 0.000 description 9
- 238000000926 separation method Methods 0.000 description 7
- 239000000126 substance Substances 0.000 description 7
- 239000012452 mother liquor Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000010170 biological method Methods 0.000 description 2
- 239000012267 brine Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000003204 osmotic effect Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 229910052938 sodium sulfate Inorganic materials 0.000 description 2
- 235000011152 sodium sulphate Nutrition 0.000 description 2
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000012271 agricultural production Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 230000002289 effect on microbe Effects 0.000 description 1
- 238000002848 electrochemical method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000009292 forward osmosis Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000001728 nano-filtration Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000011197 physicochemical method Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000941 radioactive substance Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000005185 salting out Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
-
- 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
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention relates to an anti-blocking desalination device and a desalination method, the device mainly comprises a device shell and a device inner member, wherein the inner member comprises a guide structure at the inner side of the device, a hollow cylinder concentric with the device shell and an umbrella cap arranged at the upper part of the hollow cylinder, a buffer zone and a gas distributor are arranged at the bottom of the device, and an inner cylinder is arranged in the buffer zone; the liquid distributor is arranged at the bottom ends of two sides of the shell, and the wastewater symmetrically enters a ring system between the inner cylinder of the buffer zone and the shell. The device and the method can meet the requirement of long-period stable operation, can realize the efficient removal of salt in the wastewater, and solve the problems of difficult desalination, easy blockage and the like of the high-salt wastewater.
Description
Technical Field
The invention belongs to the field of high-salt wastewater desalination, and particularly relates to an anti-blocking desalination device and a desalination method.
Background
High-salt wastewater refers to wastewater with a total salt content of at least 1% by mass. The salt content of the wastewater discharged in the production processes of petroleum exploitation, printing and dyeing, papermaking, pharmacy, chemical industry and the like is generally about 15-25%, and the wastewater contains various substances, mainly including salt, oil, organic heavy metals, radioactive substances and the like, and if the wastewater is directly discharged without treatment, the wastewater is liable to generate great harm to water body organisms, domestic drinking water and industrial and agricultural production water.
At present, the research on high-salt wastewater at home and abroad mainly comprises a biological method, a physical and chemical method and the like. The biological method shows higher organic matter removal rate when treating high-salt wastewater, but the high-concentration salt substances have an inhibition effect on microorganisms and the content of the salt in the water needs to be controlled. The physicochemical method mainly comprises an evaporation method, an electrochemical method, an ion exchange method, a membrane separation technology and the like, but has the problems of large investment, high operation cost, easiness in causing secondary pollution of regenerated wastewater and the like, and the expected purifying effect is difficult to achieve.
CN105461134a discloses a process and a device thereof for recycling high-salt wastewater in coal chemical industry. The water, sodium chloride and sodium sulfate in the industrial wastewater are recovered through three units of nanofiltration salt separation, double-inlet double-outlet multiple-effect evaporation and aging mother liquor treatment, and not less than 99% of water and not less than 90% of salt can be recovered. But the process flow is complex and the operation cost is high.
CN104326615a discloses an energy-saving high-salt wastewater treatment system and a treatment method thereof, wherein the system comprises a forward osmosis salt concentration device and a multi-effect evaporator. Aiming at the high osmotic pressure characteristic of high-salt wastewater, the method prepares the drawing liquid with higher number dependence, and utilizes the osmotic pressure difference caused by the number dependence difference of the solution to ensure that the high-salt wastewater is efficiently concentrated and simultaneously recycle water resources to generate electric energy. However, this method requires the preparation of a specific drawing liquid, and in particular, the concentrated salt still has the possibility of blocking the equipment, and cannot be stably operated for a long period of time.
CN105110542a discloses a method for purifying industrial high-salt wastewater by zero discharge and salt separation, which comprises the steps of firstly recovering sodium sulfate in strong brine by a freezing method, further improving the concentration of the brine to 25-30% by an evaporator, then entering a forced circulation crystallizer, when the solid content in the crystallizer reaches 30-35%, starting to pump out the circulating pump to a cyclone separator to realize preliminary solid-liquid separation, enabling the separated crystals containing a small amount of mother liquor to enter a centrifuge for thorough solid-liquid separation, and enabling the mother liquor which is spun out to directly enter a mother liquor tank. But this method also does not take into account clogging of the equipment by the freeze-recovered salt.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an anti-blocking desalting device and a desalting method. When the device and the method are used for desalting high-salt wastewater, the requirement of long-period stable operation can be met, the high-efficiency removal of salt in the wastewater can be realized, and the problems of difficult desalting and easy blockage of the high-salt wastewater are solved.
The invention provides an anti-blocking desalination device, which comprises a device shell and an internal component of the device, wherein the internal component is arranged in the upper space of the shell and comprises a guide structure at the inner side of the device, a hollow cylinder concentric with the device shell and an umbrella cap arranged at the upper part of the hollow cylinder, the upper end and the lower end of the hollow cylinder are all open, the lower part of the hollow cylinder is provided with a conical diffusion section, and the diameter of the opening of the diffusion section is smaller than the inner diameter of the device; the lower end opening of the hollow cylinder is a guide opening, the annular opening formed by the lower end opening and the inner wall of the device is a reflux opening of solid particles in the device, and the reacted material can carry part of particles into the hollow cylinder through the guide structure, so that the solid particles reflux to the lower part of the device through the outer side of the hollow cylinder; solid particles are filled in the device shell to serve as crystal nuclei; a buffer area and a gas distributor are arranged at the bottom of the device, an inner cylinder is arranged in the buffer area, and gas distribution holes of the gas distributor are positioned in the inner cylinder; the liquid distributor is arranged at two sides of the shell and lower than the upper edge of the inner cylinder in the vertical direction, and wastewater symmetrically enters a ring system between the inner cylinder and the shell in the buffer zone.
In the invention, the device shell has a cylindrical structure and the like. The buffer area accounts for 25-40% of the device volume, and the temperature of the buffer area is 1-15 ℃ lower than that of the upper area. The inner cylinder can be straight cylinder type or horn type, is arranged at the lower part of the inner cavity of the shell, is 100-500mm lower than the upper edge of the inner cylinder in the vertical direction, and forms an inner circulation in a buffer zone when the device is operated, so that the crystallization and blockage of salt in the bottom space are avoided.
In the invention, the outer diameter of the inner cylinder is 60% -80%, preferably 67% -73% of the inner diameter of the shell, and the height of the inner cylinder is 20% -60%, preferably 30% -50% of the height of the inner cavity of the shell.
In the invention, the liquid distributor adopts a structure which can enable liquid to be sprayed into the device, such as a nozzle type or a jet device. The top of the device shell is provided with a gas outlet for guiding out desalted materials.
In the invention, the umbrella cap is coaxial with the hollow cylinder, the cone angle is 30-150 degrees, preferably 60-120 degrees, and the height of the umbrella cap is 5-20% of the height of the inner cavity of the shell. The outer diameter of the straight section of the hollow cylinder is 60% -80% of the inner diameter of the shell, preferably 67% -73%, and the height of the straight section is 10% -30% of the height of the inner cavity of the shell. The maximum outer diameter of the conical diffusion section of the hollow cylinder is 75-90% of the inner diameter of the shell, and the height of the conical diffusion section of the hollow cylinder is 3-10% of the height of the inner cavity of the shell.
In the invention, the guide structure is arranged at the upper part of the inner cavity of the shell around the inner wall of the shell, the longitudinal section along the central axis of the shell is trapezoid, and the coverage angle alpha and the friction angle beta of the trapezoid are acute angles, preferably 5-70 degrees. The guide structure surrounds the inner cavity of the shell to form a channel with an upper opening and a lower opening, the inner diameter of the guide opening is 60% -80% of the inner diameter of the shell, and the height of the guide opening is 5% -15% of the height of the inner cavity of the shell.
In the invention, the ratio of the height of the inner cavity of the shell to the inner diameter is 7-17, preferably 10-14.
In the invention, the device is provided with a solid particle on-line feeding and discharging system, and solid particles in the device are fed and discharged periodically. The solid particle on-line feeding and discharging system is characterized in that a solid particle feeding port is arranged at the upper part of a device shell, and a solid particle discharging port is arranged at the bottom of the shell.
In the invention, the device is provided with heat exchange equipment in a matching way and is used for recovering heat between the desalted high-temperature material and the reaction feed. The device is provided with pH adjusting equipment in a matching way and is used for adjusting the feeding wastewater to be in an alkaline environment, so that corrosion of the equipment is prevented.
The invention also provides a desalting method for treating high-salt wastewater by adopting the anti-blocking device, the high-salt wastewater enters a ring system between an inner cylinder and a shell of a buffer zone from two symmetrical liquid distributors at the lower part of the device, internal circulation is formed in the buffer zone during operation, gas enters the buffer zone through a bottom gas distributor, solid particles are in a flowing state under the action of gas and liquid, the solid particles react at a certain temperature and under a certain pressure, the temperature rises by 1-15 ℃ after the reaction of the buffer zone, the solid particles enter an upper region, salt in the high-salt wastewater is deposited on the solid particles, the solid particles of deposited salt move downwards to a solid particle discharge outlet along with the progress of the reaction, after the gas-solid two phases of the reacted materials are separated, the solid phase returns to the device, and the gas phase is discharged out of the device.
In the invention, the TDS in the high-salt wastewater is not higher than 20wt%, preferably 5-20wt%, and the COD in the high-salt wastewater is more than 20000mg/L, preferably 20000-40000mg/L.
In the present invention, the operating pressure is 23-35MPa, preferably 25-30MPaG, the operating temperature is 350-650 ℃, preferably 450-550 ℃, the residence time is 10-1800 seconds, preferably 60-600 seconds, and the space velocity is 1.5-270h -1 。
In the invention, the gas adopts at least one of air and oxygen, and the dosage is that the temperature of the wastewater after the reaction is increased by more than 4 ℃, preferably 6-8 ℃.
In the invention, the solid particles in the device are one or more of alumina pellets and silica pellets, and the addition amount of the solid particles accounts for 1/4-3/4 of the volume of the device, preferably 1/4-1/2. The diameter of the solid particles is 0.1-1.0mm, preferably 0.2-0.7mm, the specific surface area is 100-300m2/g, and the bulk density is 0.6-0.7g/cm3.
In the invention, salt-containing solid particles discharged by the device are subjected to ultrasonic and high-temperature stirring and polishing modes to recover salt deposited on the particles, so that the regeneration of the particles is realized.
In the invention, if the pH value of the feed wastewater is low, at least one of sodium hydroxide and potassium hydroxide solution is added into the feed wastewater, so that the pH value of the solution in the device is 9-13.
Compared with the prior art, the invention has the following outstanding characteristics:
(1) The desalting reactor provided by the invention can realize high-efficiency desalting of wastewater, and precipitated salt is deposited on solid particles, so that the problem of blockage of the reactor and a pipeline is avoided.
(2) The design of the internal components of the reactor ensures the high-efficiency separation of solid particles and desalted materials and avoids the large amount of particles from being carried out.
(3) The arrangement of the buffer zone utilizes the oxidation heat release of the organic matters in the wastewater to raise the reaction temperature, realizes the control of the salting-out zone, can decompose and remove the organic matters, and simultaneously avoids the deposition and the blockage at the bottom of the reactor, thereby playing a role in achieving two purposes.
Drawings
FIG. 1 is a schematic structural view of one embodiment of the reactor of the present invention.
Wherein: 1-gas inlet, 2-solid particle outlet, 3-gas distributor, 4-solid particles, 5-device shell, 6-guiding port, 7-guiding structure, 8-hollow cylinder, 9-umbrella cap, 10-discharge port, 11-solid particle inlet, 12-inner cylinder and 13-1, 2-liquid distributor.
Detailed Description
The process and effects of the present invention are described in further detail by the following examples. The embodiments and specific operation procedures are given on the premise of the technical scheme of the invention, but the protection scope of the invention is not limited to the following embodiments.
With reference to fig. 1, the structural features and the working principle of the desalination device of the invention are as follows:
the desalination device comprises a housing 5 and an inner member, wherein the inner member comprises a guiding structure 7, a hollow cylinder 8 and a cap 9. The hollow cylinder 8 and the umbrella cap 9 positioned at the upper part of the hollow cylinder are higher than the guide structure 7, the upper end and the lower end of the hollow cylinder are all open, the lower part is a conical diffusion section, and the umbrella cap 9 is concentric with the hollow cylinder 8. The lower end opening of the hollow cylinder 8 is a logistics guide opening 6, the annular opening formed by the lower end opening of the hollow cylinder and the inner wall of the desalination device is a reflux opening of solid particles in the desalination device, and the separated solid particles return to the lower part of the desalination device. An inner cylinder 12 and a gas distributor 3 are arranged in the lower region of the desalination device, gas distributor gas distribution holes are arranged in the inner cylinder 12, liquid distributors 13 are arranged on two sides of a shell of the desalination device and are lower than the upper edge of the inner cylinder in the vertical direction, and wastewater symmetrically enters a ring system between the inner cylinder and the shell of the buffer zone.
The high-salt wastewater enters a ring system between an inner cylinder and a shell of a buffer zone through two symmetrical liquid distributors 13-1 and 13-2 at the lower part of a desalting device, internal circulation is formed in the buffer zone during operation, gas enters the buffer zone through a gas inlet 1 and a gas distributor 3, solid particles are in a flowing state under the action of gas and liquid, the temperature rises by 1-15 ℃ after the reaction of the buffer zone, the solid particles enter an upper region, the reaction is carried out under certain temperature and pressure, salt in the high-salt wastewater is deposited on the solid particles, the solid particles of the deposited salt move downwards to a solid particle outlet along with the progress of the reaction, part of particles carried by the reacted materials enter a hollow cylinder 8 and an umbrella 9 through a guide opening 6 surrounded by a guide structure 7 for separation, the separated particles flow back to the lower part through the outer side of a tubular structure inner member, and the desalted wastewater is discharged out of the reactor through a discharge outlet 10. In order to discharge the crystallized saturated solid particles out of the reactor in time and to replenish fresh particles, fresh particles are replenished into the reaction system through the solid particle charging port 11 in the upper part of the reactor, and the solid particles are discharged out of the reaction system through the solid particle discharging port 2 in the lower part of the reactor.
Example 1
The desalination apparatus shown in FIG. 1 of the present invention was used in the same manner as in example 1. In the high-salt organic wastewater, the COD concentration is 92600mg/L, the TDS is 13.5wt% and the pH is 8.5.
Introducing high-salt organic wastewater (at room temperature and 30 MPa), and oxygen (at room temperature and 30 MPa) into a desalination device, wherein solid particles in the desalination device are alumina ceramic pellets with a diameter of 0.4mm and a bulk density of 0.65g/cm 3 Specific surface area of 260m 2 The solid particles were added in an amount of 1/2 of the volume of the apparatus. The oxygen intake is 300% of the theoretical oxygen demand of wastewater oxidation. The operating temperature of the device cavity is 600 ℃, the pressure is 28MPa, and the residence time is 30 seconds. The addition and discharge amount of the solid particles is 75g.h -1 •L -1 And (5) water inflow. After treatment, the COD concentration in the effluent is 54mg/L, and the TDS concentration is 63mg/L, thereby meeting the direct discharge requirement. The device and the pipeline are not blocked after continuous operation for 100 days.
Example 2
The difference from example 1 is that: the solid particles are silica spheres with the diameter of 0.5mm and the specific surface of 230m 2 And/g. After treatment, the COD concentration in the effluent was 53mg/L and the TDS was 62mg/L. The device and the pipeline are not blocked after continuous operation for 100 days.
Example 3
The difference from example 1 is that: sodium hydroxide is added into the high-salt wastewater to be fed, and the pH value of the fed water is controlled to be 11. After treatment, COD and TDS in the effluent are not changed greatly. But the pH value of the inlet water is controlled to be alkaline, and alkaline substances in the wastewater can neutralize acidic substances generated in the desalting process, so that corrosion of the device is avoided. The device and the pipeline are not blocked after continuous operation for 100 days.
Comparative example 1
The difference from example 1 is that: the hollow cylinder, the umbrella cap and the guiding structure are not arranged. After treatment, TDS in the effluent is 436mg/L. The operation was continued for 30 days, and slight clogging of the apparatus and the piping occurred.
Comparative example 2
The difference from example 1 is that: no solid particles are added into the device. After treatment, the TDS in the effluent is 138700mg/L. The device and the pipeline are seriously blocked after continuous operation for only 1 day.
Comparative example 3
The difference from example 1 is that: the device buffer area is not provided with an inner cylinder. After treatment, the COD concentration in the effluent is 872mg/L, the TDS is 127mg/L, and the effluent effect is reduced.
Claims (26)
1. The anti-blocking desalting device is characterized by comprising a device shell and an inner device member, wherein the inner device member is arranged in the upper space of the shell and comprises a guide structure at the inner side of the device, a hollow cylinder concentric with the device shell and an umbrella cap arranged at the upper part of the hollow cylinder, the upper end and the lower end of the hollow cylinder are all open, the lower part of the hollow cylinder is provided with a conical diffusion section, and the diameter of the opening of the diffusion section is smaller than the inner diameter of the device; the lower end opening of the hollow cylinder is a guide opening, the annular opening formed by the lower end opening and the inner wall of the device is a reflux opening of solid particles in the device, and the reacted material can carry part of particles into the hollow cylinder through the guide structure, so that the solid particles reflux to the lower part of the device through the outer side of the hollow cylinder; solid particles are filled in the device shell to serve as crystal nuclei; a buffer area and a gas distributor are arranged at the bottom of the device, an inner cylinder is arranged in the buffer area, and gas distribution holes of the gas distributor are positioned in the inner cylinder; the liquid distributors are arranged on two sides of the shell and lower than the upper edge of the inner cylinder in the vertical direction, and wastewater symmetrically enters a ring system between the inner cylinder and the shell in the buffer zone; the buffer area accounts for 25-40% of the volume of the device, and the temperature of the buffer area is 1-15 ℃ lower than that of the upper area; the inner cylinder is straight cylinder or horn, and is set in the lower part of the inner cavity of the casing, and the liquid distributor is lower than the upper edge of the inner cylinder by 100-500mm in vertical direction and forms inner circulation inside the buffering area during operation.
2. The desalination apparatus of claim 1, wherein: the outer diameter of the inner cylinder is 60% -80% of the inner diameter of the shell, and the height of the inner cylinder is 20% -60% of the height of the inner cavity of the shell.
3. The desalination apparatus of claim 2, wherein: the outer diameter of the inner cylinder is 67% -73% of the inner diameter of the shell, and the height of the inner cylinder is 30% -50% of the height of the inner cavity of the shell.
4. The desalination apparatus of claim 1, wherein: the liquid distributor adopts a structure capable of enabling liquid to be sprayed into the device, and adopts a nozzle type or jet device.
5. The desalination apparatus of claim 1, wherein: the umbrella cap is coaxial with the hollow cylinder, and the cone angle is 30-150 degrees; the height of the umbrella cap is 5% -20% of the height of the inner cavity of the shell.
6. The desalination apparatus of claim 5, wherein: the taper angle is 60-120 deg..
7. The desalination apparatus of claim 1, wherein: the outer diameter of the straight section of the hollow cylinder is 60% -80% of the inner diameter of the shell, and the height of the straight section is 10% -30% of the height of the inner cavity of the shell.
8. The desalination apparatus of claim 7, wherein: the outer diameter of the straight section of the hollow cylinder is 67% -73% of the inner diameter of the shell.
9. The desalination apparatus of claim 1, wherein: the maximum outer diameter of the conical diffusion section of the hollow cylinder is 75-90% of the inner diameter of the shell, and the height of the conical diffusion section of the hollow cylinder is 3-10% of the height of the inner cavity of the shell.
10. The desalination apparatus of claim 1, wherein: the guide structure surrounds the inner wall of the shell and is arranged at the upper part of the inner cavity of the shell, and the longitudinal section of the guide structure along the central axis of the shell is trapezoidal.
11. The desalination apparatus of claim 1 or 10, wherein: the guide structure surrounds the inner cavity of the shell to form a channel with an upper opening and a lower opening, the inner diameter of the guide opening is 60% -80% of the inner diameter of the shell, and the height of the guide opening is 5% -15% of the height of the inner cavity of the shell.
12. The desalination apparatus of claim 1, wherein: the ratio of the height of the inner cavity to the inner diameter of the shell is 7-17:1.
13. the desalination apparatus of claim 12, wherein: the ratio of the height of the inner cavity to the inner diameter of the shell is 10-14:1.
14. the desalination apparatus of claim 1, wherein: the device is provided with a solid particle on-line feeding and discharging system, and solid particles in the device are fed and discharged periodically.
15. A desalination method for treating high salt wastewater using the desalination device of any one of claims 1-14, wherein: the high-salt wastewater enters a ring system between an inner cylinder and a shell of a buffer zone from two symmetrical liquid distributors at the lower part of the device, internal circulation is formed in the buffer zone during operation, gas enters the buffer zone from a bottom gas distributor, solid particles are in a flowing state under the action of gas and liquid, and react at a certain temperature and under a certain pressure, the temperature rises by 1-15 ℃ after the reaction of the buffer zone, the high-salt wastewater enters an upper region, salt in the high-salt wastewater is deposited on the solid particles, the solid particles of deposited salt move downwards to a solid particle outlet along with the progress of the reaction, and after the reaction, materials are separated in a gas-solid phase mode, the solid phase returns to the device and the gas phase is discharged out of the device.
16. The method according to claim 15, wherein: the TDS in the high-salt wastewater is not higher than 20wt%, and the COD in the high-salt wastewater is more than 20000mg/L.
17. The method according to claim 16, wherein: the TDS in the high-salt wastewater is 5-20wt% and the COD is 20000-40000mg/L.
18. The method according to claim 15, wherein: the pressure of the reaction is 23-35MPa, the temperature is 350-650 ℃, the residence time is 10-1800 seconds, and the airspeed is 1.5-270 hours -1 。
19. The method according to claim 18, wherein: the pressure is 25-30MPa, the temperature is 450-550 ℃, and the residence time is 60-600 seconds.
20. The method according to claim 15, wherein: the gas adopts at least one of air and oxygen, and the dosage is that the temperature of the wastewater after the reaction is increased by more than 4 ℃.
21. The method according to claim 20, wherein: the dosage is to raise the temperature of the wastewater by 6-8 ℃ after the reaction.
22. The method according to claim 15, wherein: the solid particles in the device are one or more of alumina pellets and silica pellets, and the addition amount of the solid particles accounts for 1/4-1/2 of the volume of the device.
23. The method according to claim 15, wherein: fixing deviceThe diameter of the bulk particle is 0.1-1.0mm, and the specific surface is 100-300m 2 Per gram, bulk density of 0.6-0.7g/cm 3 。
24. The method according to claim 23, wherein: the diameter of the solid particles is 0.2-0.7mm.
25. The method according to claim 15, wherein: salt-containing solid particles discharged by the device are subjected to ultrasonic and high-temperature stirring and polishing modes to recover salt deposited on the particles, so that the regeneration of the particles is realized.
26. The method according to claim 15, wherein: if the pH value of the feed wastewater is low, at least one of sodium hydroxide and potassium hydroxide solution is added into the feed wastewater, so that the pH value of the solution in the device is 9-13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911390228.5A CN113044948B (en) | 2019-12-27 | 2019-12-27 | Anti-blocking desalting device and desalting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911390228.5A CN113044948B (en) | 2019-12-27 | 2019-12-27 | Anti-blocking desalting device and desalting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113044948A CN113044948A (en) | 2021-06-29 |
| CN113044948B true CN113044948B (en) | 2024-02-06 |
Family
ID=76507499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911390228.5A Active CN113044948B (en) | 2019-12-27 | 2019-12-27 | Anti-blocking desalting device and desalting method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113044948B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113899229B (en) * | 2021-12-13 | 2022-03-11 | 东营联合石化有限责任公司 | Refined diesel oil heat utilizes system based on diesel oil hydrogenation device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102596386A (en) * | 2009-10-21 | 2012-07-18 | 中国石油化工股份有限公司 | Fluidized-bed reactor and hydrotreating method thereof |
| CN108751384A (en) * | 2018-06-13 | 2018-11-06 | 西安交通大学 | For the inner circulation fluidized bed-type supercritical water oxidation system of organic wastewater with difficult degradation thereby |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004526561A (en) * | 2001-03-09 | 2004-09-02 | カウンシル・オブ・サイエンティフィック・アンド・インダストリアル・リサーチ | Process and backflow loop reactor for sewage purification |
| CN203075681U (en) * | 2013-01-05 | 2013-07-24 | 杭州浙大合力科技有限公司 | Anti-blockage evaporation and settling chamber producing clean secondary steam |
| CN204281362U (en) * | 2014-11-06 | 2015-04-22 | 曾小芳 | For evaporative crystallization salt making equipment and the Waste Water Treatment of high salt organic waste water process |
-
2019
- 2019-12-27 CN CN201911390228.5A patent/CN113044948B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102596386A (en) * | 2009-10-21 | 2012-07-18 | 中国石油化工股份有限公司 | Fluidized-bed reactor and hydrotreating method thereof |
| CN108751384A (en) * | 2018-06-13 | 2018-11-06 | 西安交通大学 | For the inner circulation fluidized bed-type supercritical water oxidation system of organic wastewater with difficult degradation thereby |
Non-Patent Citations (3)
| Title |
|---|
| 何杰.《工业催化》.《工业催化》.中国矿业大学出版社,2014,第177页. * |
| 孙玉波.《重力选矿》.《重力选矿》.冶金工业出版社,1982,第113-114页. * |
| 王淑波.《化工原理》.《化工原理》.华中科技大学出版社,2012,第265-267页. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113044948A (en) | 2021-06-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2020140841A1 (en) | Solid precipitation device and solid precipitation method | |
| WO2018148247A1 (en) | Water treatment and desalination | |
| US10214433B2 (en) | Brine treatment scaling control system and method | |
| EP3693345B1 (en) | Treatment system for reverse osmosis concentrated water having high permanent hardness | |
| CN101928089A (en) | Method for disposing antiosmosis thick water out of purified terephthalic acid refined waste water | |
| CN108751523A (en) | High-salt wastewater is except firmly except silicon and concentration method and system | |
| CN113044948B (en) | Anti-blocking desalting device and desalting method | |
| CN104445477A (en) | Evaporative-crystallization salt making equipment and wastewater treatment system for treating high-salt organic wastewater | |
| CN107381881A (en) | The method of wastewater treatment and processing unit of desulfurization wastewater zero-emission | |
| CN109011668A (en) | A kind of crystal salt system for separating and purifying based on high slat-containing wastewater | |
| CN100528282C (en) | Tankage system incorporating adsorption clarification and parallel plate separation. | |
| CN106946408B (en) | Printing and dyeing wastewater pretreatment method and device | |
| CN109095691A (en) | A kind of recycling processing method of brine waste | |
| CN204281362U (en) | For evaporative crystallization salt making equipment and the Waste Water Treatment of high salt organic waste water process | |
| RU2805727C2 (en) | Device and method of sedimentation of solid sediments | |
| CN201574102U (en) | Integral water hardness eliminating device | |
| CN107324612B (en) | Recycling recovery method and recovery system for acetate fiber production wastewater | |
| KR20030076549A (en) | Nutrient removal of wastewater using Struvite crystalization | |
| CN105036444A (en) | Reduction and reclamation recycled water reuse zero emission treating technology | |
| CN215975369U (en) | High salt waste water salt separation crystallization system that contains | |
| JP7297122B2 (en) | Organic waste treatment method and organic waste treatment apparatus | |
| CN211733899U (en) | Adsorption treatment system for oily wastewater | |
| US11046593B2 (en) | System for treating reverse-osmosis concentrated water with permanent hardness | |
| CN217838420U (en) | Triple-effect evaporation system for high-salinity wastewater treatment | |
| CN115893632A (en) | Supercritical water oxidation treatment reactor and treatment method |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20240201 Address after: 100728 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen Applicant after: CHINA PETROLEUM & CHEMICAL Corp. Country or region after: China Applicant after: Sinopec (Dalian) Petrochemical Research Institute Co.,Ltd. Address before: 100728 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen Applicant before: CHINA PETROLEUM & CHEMICAL Corp. Country or region before: China Applicant before: DALIAN RESEARCH INSTITUTE OF PETROLEUM AND PETROCHEMICALS, SINOPEC Corp. |
|
| TA01 | Transfer of patent application right |