CN107879529B - Supercritical water reaction device with desalting function - Google Patents
Supercritical water reaction device with desalting function Download PDFInfo
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- CN107879529B CN107879529B CN201711056748.3A CN201711056748A CN107879529B CN 107879529 B CN107879529 B CN 107879529B CN 201711056748 A CN201711056748 A CN 201711056748A CN 107879529 B CN107879529 B CN 107879529B
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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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F1/025—Thermal hydrolysis
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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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
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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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/06—Pressure conditions
- C02F2301/066—Overpressure, high pressure
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- 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)
- Water Treatment By Sorption (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention discloses a supercritical water reaction device with a desalting function, which comprises a reactor, wherein a sewage inlet and an oxygen interface are arranged at the upper end of the reactor, a pressure gauge interface and a thermocouple interface are arranged on the outer side wall of the reactor, a pressure gauge is arranged in the pressure gauge interface, a thermocouple is arranged at the thermocouple interface, a precise filter screen and a plurality of partition plates are sequentially arranged between the inner side walls of the reactor from bottom to top, an adsorption layer is arranged on the upper surface of each partition plate, a sewage channel is respectively formed between part of the edge of each partition plate and the inner side wall of the reactor, two adjacent sewage channels are distributed in a staggered mode in the vertical direction, a sewage through hole at the uppermost end is far away from the sewage inlet, and a sewage outlet and a salt discharging interface are arranged at the lower end of the reactor. The supercritical water reaction device with the desalting function can greatly reduce the amount of salt deposited in the reactor when treating sewage, thereby avoiding the reactor from being blocked.
Description
Technical Field
The invention belongs to the technical field of wastewater treatment equipment, and particularly relates to a supercritical water reaction device with a desalting function.
Background
Supercritical Water (SCW) is Water in a special state with a temperature and pressure higher than its critical point (T: 374.15 ℃, P: 22.12 MPa). Supercritical water has the properties of liquid water and gaseous water, only a small amount of hydrogen bonds exist in the state, the dielectric constant is similar to that of a polar organic solvent, and the supercritical water has a high diffusion coefficient and low viscosity. Under the supercritical state, the organic matter and oxygen can be mutually dissolved with supercritical water, so that heterogeneous reaction is changed into homogeneous reaction, and the resistance of mass transfer and heat transfer is greatly reduced.
Based on the unique physical and chemical properties of supercritical water, supercritical water gasification technology and supercritical water oxidation technology are developed. The supercritical water gasification technology utilizes the unique physical and chemical properties of supercritical water, under the premise of not adding an oxidant or adding a small amount of oxidant, organic matters undergo reactions such as oxidation, hydrolysis, pyrolysis and the like under the homogeneous condition of the supercritical water, and finally generate combustible gaseous products mainly comprising hydrogen, carbon monoxide, methane and carbon dioxide, and compared with the traditional gasification technology, the supercritical water gasification technology has higher gasification efficiency and can reach more than 98 percent. The supercritical water oxidation technology also utilizes the unique physical and chemical properties of supercritical water, but needs to lead organic matters to generate oxidation reaction taking free radicals as leading parts under the participation of oxygen, so that the carbon-containing organic matters in the wastewater are quickly and thoroughly oxidized into carbon dioxide and water, and the supercritical water oxidation technology has the advantages of quick and thorough reaction, cleanness and environmental protection.
However, the dielectric constant of supercritical water is low, the solubility of salts in supercritical water is low, and the salts are easily precipitated and adsorbed on the inner wall of the reactor, so that heat transfer is deteriorated, microcirculation is easily formed on the inner wall of the reactor, the corrosion of materials is aggravated, the reactor is blocked when the corrosion is serious, and potential danger is formed. Therefore, the problem of reactor blockage caused by salt deposition in the supercritical water technology is one of the important factors hindering the popularization and application of the reactor.
Disclosure of Invention
The invention aims to provide a supercritical water reaction device with a desalting function, which solves the problem that salts are easy to deposit in a reactor in a supercritical water technology to cause the reactor to be blocked.
The technical scheme adopted by the invention is as follows: the utility model provides a take supercritical water reaction unit of desalination function, includes the reactor, the upper end of reactor is provided with sewage inlet and oxygen interface, is provided with pressure gauge interface and thermocouple interface on the lateral wall of reactor, be provided with the pressure gauge in the pressure gauge interface, thermocouple pipe connector interface is provided with the thermocouple, by having set gradually precision filtering net and a plurality of baffle on going between the inside wall of reactor, every the upper surface of baffle all is provided with the adsorbed layer, is formed with a sewage passageway between the partial border of every baffle and the inside wall of reactor respectively to two adjacent sewage passageways distribute in vertical direction is crisscross, and the sewage inlet setting is kept away from to the sewage through-hole that is located the top, and the lower extreme of reactor is provided with the sewage export and arranges the salt interface.
The invention is also characterized in that:
one or more cooling water interfaces are arranged on the outer side wall of the reactor.
The cooling water interface is positioned below the clapboard.
The upper end and the lower end of the reactor are respectively provided with an opening, the upper end of the reactor is detachably connected with an upper sealing cover, the lower end of the reactor is detachably connected with a lower sealing cover, the sewage inlet and the oxygen interface are both positioned on the upper sealing cover, and the sewage outlet and the salt discharging interface are positioned on the lower sealing cover.
The reactor is characterized in that a first annular flange is arranged on the outer wall of the upper end of the reactor, a second annular flange is arranged on the outer wall of the lower end of the reactor, the upper sealing cover is fixedly connected to the first annular flange through bolts, and the lower sealing cover is fixedly connected to the second annular flange through bolts.
The adsorption layer is a filler layer or an adsorbent layer.
Two adjacent sewage channels are distributed in a 180-degree staggered mode in the vertical direction.
The partition plate is horizontally arranged.
The filtering precision of the precise filter screen is 5um-10 um.
The invention has the beneficial effects that: (1) the length of the reactor can be adjusted according to actual needs, so that the reactor is convenient for commercial amplification application; (2) after the salt is separated out under the supercritical condition, the salt can be adsorbed by the adsorption layer on the partition board, and in addition, the partition boards are arranged in a staggered way, so that the effluent time of sewage is prolonged, and the oxidation reaction and the adsorption of salt particles are promoted to be carried out more fully; (3) the precise filter screen arranged at the bottom of the reactor can prevent precipitated salt particles from entering a subsequent pipeline to cause valve abrasion and blockage.
Drawings
FIG. 1 is a schematic view of a supercritical water reactor with desalination function according to the present invention.
In the figure, 1, a reactor, 2, a pressure gauge, 3, a sewage inlet pipe, 4, an oxygen pipe, 5, an upper sealing cover, 6, a first annular flange, 7, a partition plate, 8, a thermocouple, 9, a precision filter screen, 10, a second annular flange, 11, a lower sealing cover; 12. a blow-off pipe; 13. a salt discharge pipe; 14. and cooling the water pipe.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The supercritical water reaction device with the desalting function comprises a reactor 1 as shown in figure 1, wherein the working pressure in the reactor 1 is 25 MPa-30 MPa, the working temperature is 400-650 ℃, and the reactor can be heated by other auxiliary heaters. The upper end of reactor 1 is provided with sewage import and oxygen interface, and sewage import is connected with into dirty pipe 3, and sewage lets in reactor 1 through advancing dirty pipe 3 in, and oxygen interface connection has oxygen hose 4, and oxygen passes through oxygen hose 4 and carries oxygen in to reactor 1. A precise filter screen 9 and a plurality of clapboards 7 are sequentially arranged between the inner side walls of the reactor 1 from bottom to top, the filtering precision of the precise filter screen 9 is 5-10 um, the upper surface of each clapboard 7 is provided with an adsorption layer which can be composed of fillers or adsorbents (the fillers are filler layers, and the adsorbents are adsorbent layers); a sewage channel is formed between the partial edge of each partition plate 7 and the inner side wall of the reactor 1 respectively, two adjacent sewage channels are distributed in a staggered mode in the vertical direction and are conducted indirectly, in addition, the sewage channel positioned at the uppermost end is far away from a sewage inlet, so that sewage can be ensured to flow into the surface of the partition plate 7 at the uppermost end firstly and then flow into the surface of the next-stage partition plate 7 from the sewage channel at the uppermost end. The outer side wall of the reactor 1 is provided with a pressure gauge interface and a plurality of thermocouple interfaces, a pressure gauge 2 is arranged in the pressure gauge interface, one thermocouple interface can be respectively arranged between every two partition plates 7, each thermocouple interface is respectively provided with a thermocouple 8, the pressure gauge 2 and the thermocouple 8 respectively monitor the pressure inside the reactor 1 and the temperature of different parts in real time, and when the pressure gauge 2 detects that the pressure rapidly rises, oxygen supply is stopped. The lower end of the reactor 1 is provided with a sewage outlet and a salt discharge interface, a sewage discharge pipe 12 is arranged in the sewage outlet, a salt discharge pipe 13 is arranged in the salt discharge interface, and the sewage discharge pipe 12 and the salt discharge pipe 13 are both connected with a lower-level sewage discharge pipeline.
When the reactor works, firstly, oxygen and preheated high-temperature sewage are respectively conveyed into the reactor 1 through the oxygen pipe 4 and the sewage inlet pipe 3, on one hand, organic matters in the sewage can be subjected to oxidation reaction with the oxygen under the supercritical condition of the reactor 1, and finally carbon dioxide and water are generated and are discharged from the sewage discharge pipe 12 along with the sewage; soluble salt in the on the other hand sewage is appeared with the salt grain form under supercritical condition, and when sewage flowed through each baffle 7 in proper order, the vast majority of salt grain in the sewage can be adsorbed by the adsorbed layer on each baffle 7, still can filter the remaining great salt grain in the sewage through precision filtration net 9 before sewage discharges into blow off pipe 12. The baffle plates 7 are arranged in a staggered mode, so that the time of sewage outflow is prolonged, and oxidation reaction and salt particle adsorption are promoted to be carried out more sufficiently. The staff should stop regularly heating reactor 1 to open salt discharging pipe 13, wait to drop to the normal atmospheric temperature back with the cooling water access and advance dirty pipe 3 with reactor 1 inside temperature, wash reactor 1, the adsorbed salt grain of adsorbed on the adsorbed layer and the salt grain of deposit on precision filter 9 can be dissolved in the cooling this moment, finally follow salt discharging pipe 13 and discharge.
As shown in fig. 1, two cooling water ports are provided on the outer side wall of the reactor 1, each cooling water port is located below the partition 7, and each partition 7 should be horizontally disposed.
During operation, can let in the reactor 1 through cooling tube 14 with cooling water, the temperature of sewage can obtain reducing this moment, and the salt grain that separates out will dissolve in sewage again, finally discharges from blow off pipe 12 along with sewage together, has avoided depositing too much salt grain on the precision filter screen 9, blocks precision filter screen 9 to the mesh of desalination has further been realized.
As shown in fig. 1, the upper end and the lower end of a reactor 1 are respectively opened, the upper end of the reactor 1 is detachably connected with an upper sealing cover 5, the lower end of the reactor 1 is detachably connected with a lower sealing cover 11, a sewage inlet and an oxygen interface are both positioned on the upper sealing cover 5, and a sewage outlet and a salt discharge interface are positioned on a lower sealing cover 12.
Specifically, a first annular flange 6 is provided on the outer wall of the upper end of the reactor 1, a second annular flange 10 is provided on the outer wall of the lower end of the reactor 1, the upper seal cover 5 is detachably fixedly coupled to the first annular flange 6 by bolts, and the lower seal cover 11 is detachably fixedly coupled to the second annular flange 10 by bolts.
The invention discloses a supercritical water reaction device with a desalting function: the length of the reactor 1 can be adjusted according to actual needs, thereby facilitating the commercial amplification application; after the salt is separated out under the supercritical condition, the salt can be adsorbed by the adsorption layer on the partition board 7; the clapboards 7 are arranged in a staggered way, so that the time of sewage outflow is prolonged, and the oxidation reaction and the salt particle adsorption are promoted to be carried out more sufficiently; the precise filter screen 9 arranged at the bottom of the reactor 1 can further filter larger salt particles, and prevent the separated larger salt particles from entering a subsequent pipeline to cause valve abrasion and blockage.
Claims (9)
1. A supercritical water reaction device with desalination function is characterized by comprising a reactor (1), the upper end of the reactor (1) is provided with a sewage inlet and an oxygen interface, the outer side wall of the reactor (1) is provided with a pressure gauge interface and a thermocouple interface, a pressure gauge (2) is arranged in the pressure gauge connector, a thermocouple (8) is arranged at the thermocouple pipe connector, a precise filter screen (9) and a plurality of clapboards (7) are sequentially arranged between the inner side walls of the reactor (1) from bottom to top, the upper surface of each clapboard (7) is provided with an adsorption layer, a sewage channel is respectively formed between the partial edge of each clapboard (7) and the inner side wall of the reactor (1), and two adjacent sewage channels are distributed in a staggered manner in the vertical direction, the sewage channel positioned at the uppermost end is far away from the sewage inlet, and the lower end of the reactor (1) is provided with a sewage outlet and a salt discharging interface.
2. Supercritical water reaction apparatus with desalination function according to claim 1 is characterized by that one or more cooling water interfaces are arranged on the outer side wall of the reactor (1).
3. The supercritical water reaction apparatus with desalination function according to claim 2 is characterized in that the cooling water interface is located below the partition plate (7).
4. The supercritical water reactor with desalination function as defined in claim 1 wherein the reactor (1) has an open upper end and a open lower end, the upper end of the reactor (1) is detachably connected with an upper sealing cover (5), the lower end of the reactor (1) is detachably connected with a lower sealing cover (11), the sewage inlet and the oxygen port are both located on the upper sealing cover (5), and the sewage outlet and the salt discharge port are located on the lower sealing cover (11).
5. The supercritical water reaction apparatus with desalination function according to claim 4, characterized in that the reactor (1) is provided with a first annular flange (6) on the outer wall of the upper end, the reactor (1) is provided with a second annular flange (10) on the outer wall of the lower end, the upper sealing cover (5) is fixedly connected to the first annular flange (6) by bolts, and the lower sealing cover (11) is fixedly connected to the second annular flange (10) by bolts.
6. The supercritical water reaction apparatus with desalination function of claim 1 is characterized in that the adsorption layer is a filler layer or an adsorbent layer.
7. The supercritical water reactor with desalination function of claim 1, wherein two adjacent sewage channels are distributed in a vertical direction with 180 ° stagger.
8. The supercritical water reaction apparatus with desalination function according to claim 7 is characterized in that each of the separators (7) is horizontally disposed.
9. The supercritical water reaction apparatus with desalination function of claim 1, characterized in that the precision of the fine filter (9) is 5um-10 um.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711056748.3A CN107879529B (en) | 2017-10-27 | 2017-10-27 | Supercritical water reaction device with desalting function |
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| CN201711056748.3A CN107879529B (en) | 2017-10-27 | 2017-10-27 | Supercritical water reaction device with desalting function |
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| CN107879529A CN107879529A (en) | 2018-04-06 |
| CN107879529B true CN107879529B (en) | 2020-08-18 |
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Families Citing this family (3)
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| CN109574194B (en) * | 2019-01-23 | 2024-06-07 | 南京新奥环保技术有限公司 | Supercritical water oxidation treatment system |
| CN112844346A (en) * | 2020-12-31 | 2021-05-28 | 成都九翼环保科技有限公司 | Supercritical hydrothermal powdered activated carbon regeneration device and method |
| CN114275872A (en) * | 2022-01-14 | 2022-04-05 | 杭州深瑞水务有限公司 | Oxidation tower for subcritical water oxidation process |
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