CN111943349A - Glow plug ignition internal combustion type continuous supercritical water oxidation device - Google Patents
Glow plug ignition internal combustion type continuous supercritical water oxidation device Download PDFInfo
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- 238000009284 supercritical water oxidation Methods 0.000 title claims abstract description 52
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 14
- 238000006243 chemical reaction Methods 0.000 claims abstract description 136
- 239000000446 fuel Substances 0.000 claims abstract description 86
- 238000000926 separation method Methods 0.000 claims abstract description 49
- 150000003839 salts Chemical class 0.000 claims abstract description 48
- 239000007800 oxidant agent Substances 0.000 claims description 90
- 230000001590 oxidative effect Effects 0.000 claims description 90
- 239000002351 wastewater Substances 0.000 claims description 63
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 20
- 239000012267 brine Substances 0.000 claims description 16
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims description 16
- 229910052760 oxygen Inorganic materials 0.000 claims description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 11
- 239000001301 oxygen Substances 0.000 claims description 11
- 239000003502 gasoline Substances 0.000 claims description 10
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 4
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 4
- 239000000243 solution Substances 0.000 claims description 4
- 238000005485 electric heating Methods 0.000 claims description 3
- 239000003570 air Substances 0.000 claims description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 2
- 239000003350 kerosene Substances 0.000 claims description 2
- 239000012286 potassium permanganate Substances 0.000 claims description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 2
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 abstract description 28
- 239000007788 liquid Substances 0.000 abstract description 27
- 230000015556 catabolic process Effects 0.000 abstract description 2
- 238000006731 degradation reaction Methods 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 230000002349 favourable effect Effects 0.000 abstract description 2
- 239000010815 organic waste Substances 0.000 abstract description 2
- 239000010865 sewage Substances 0.000 abstract description 2
- -1 and in addition Substances 0.000 abstract 1
- 238000007599 discharging Methods 0.000 abstract 1
- 238000012994 industrial processing Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000007795 chemical reaction product Substances 0.000 description 25
- 239000012530 fluid Substances 0.000 description 25
- 239000012266 salt solution Substances 0.000 description 24
- 239000000463 material Substances 0.000 description 19
- 239000002245 particle Substances 0.000 description 19
- 239000007787 solid Substances 0.000 description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 19
- 239000007789 gas Substances 0.000 description 16
- 238000000034 method Methods 0.000 description 10
- 238000007254 oxidation reaction Methods 0.000 description 10
- 239000002699 waste material Substances 0.000 description 10
- 238000005260 corrosion Methods 0.000 description 9
- 230000007797 corrosion Effects 0.000 description 9
- 230000008021 deposition Effects 0.000 description 9
- 230000005484 gravity Effects 0.000 description 9
- 239000005416 organic matter Substances 0.000 description 9
- 238000013021 overheating Methods 0.000 description 8
- 239000012466 permeate Substances 0.000 description 8
- 230000001681 protective effect Effects 0.000 description 8
- 230000003647 oxidation Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 239000000498 cooling water Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012429 reaction media Substances 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
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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
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
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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)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention provides a glow plug ignition internal combustion type continuous supercritical water oxidation device which comprises an ignition region, a reaction region and a separation region. The device utilizes the heat of glow plug to ignite the fuel in the reaction inclined tube, makes the temperature in the reaction zone reach the reaction requirement rapidly, has realized preheating fast and high-efficient degradation of organic waste liquid, and in addition, fuel need not to use the pre-heater among the whole heating process, has reduced the investment and the energy consumption of equipment. The separation straight tube lower extreme is equipped with first electric ball valve, arranges salt pipe and the electric ball valve of second, through the switch of adjusting first electric ball valve and the electric ball valve of second, can realize the automatic salt discharging of device, avoids the production that contains salt sewage, is favorable to the continuous operation and the zero release of reactor, satisfies the industrial processing demand.
Description
Technical Field
The invention relates to the field of supercritical water oxidation, in particular to a glow plug ignition internal combustion type continuous supercritical water oxidation device.
Background
The supercritical water oxidation (SCWO) technology is characterized in that supercritical water is used as a reaction medium, and air and O are used at the temperature of 400-600 ℃ under the pressure of 23-30 MPa2Or H2O2As an oxidant, degrading organic matter to harmless CO2、N2And H2Advanced oxidation technology of small molecules such as O, in which Cl, P and S are usually converted into corresponding acids or precipitated as inorganic salts, SCWO technology is recognized as the most promising waste treatment key technology in the energy and environmental fields in the United states,although the application foundation has been formed, some SCWO industrial devices are available at home and abroad, the problems of corrosion of the reactor, salt deposition and high operation cost hinder the industrialized popularization of the technology.
Patent No. CN 104291546A's supercritical water oxidation device, the main part comprises the inclined tube reactor that the slope was placed and the straight tube separator of perpendicular placement, preheat and get into the pipe chute after 200 ℃ of waste material mixes with oxidant and 500 ~ 600 ℃ of supercritical water, be equipped with porous interior bushing pipe in the pipe chute, boundary fluid forms the protection film at the inside surface of lining pipe, avoid solid particle at reactor inner wall deposit, when reducing the corruption and the salt deposit of reaction product to the pipe chute, reduce reaction pipe chute inner wall temperature, ensure the safe operation of equipment, reduce the material requirement of equipment. The product is subjected to solid-liquid separation in a separator through gravity settling, and is neutralized and cooled by cooling water, and solid particles at the bottom of the separator are dissolved and discharged. But along with the going on of reaction, the device need constantly let in 500 ~ 600 ℃ supercritical water, has high running cost problem, can produce secondary pollution after solid particle dissolves the discharge moreover, can't realize the zero release, is unfavorable for the continuous operation of device.
At present, in order to solve the problem of preheating materials, a supercritical water oxidation reactor with patent number CN102190363A for supplying heat by using auxiliary fuel is provided with a fuel heating method, wherein the heat required by the reaction is supplied by using the auxiliary fuel, and materials, fuel and an oxidant (air or oxygen) are efficiently mixed by jet flows in different directions so as to improve the oxidation efficiency. However, this device has the problems of difficult ignition of the fuel, the use of a preheater before entering the reactor together with the oxidant, and high running cost.
Disclosure of Invention
Aiming at the problems, the invention provides a glow plug ignition internal combustion type continuous supercritical water oxidation device, which solves the problems of high operation cost during preheating of the device and secondary pollution during salt elimination.
The technical scheme of the invention is as follows:
a glow plug ignition internal combustion type continuous supercritical water oxidation device comprises an ignition region, a reaction region and a separation region,
the ignition region consists of a fuel inlet pipe (1), a first stop valve (2), a fuel outlet pipe (3), a three-way valve (4), a fuel and wastewater outlet pipe (5), a first oxidant inlet pipe (6), a second stop valve (7), a first oxidant outlet pipe (8), an inclined pipe end cover (9) and a glow plug (10),
the fuel inlet pipe (1) is connected with an inlet of a first stop valve (2), an outlet of the first stop valve (2) is connected with a fuel outlet pipe (3), a fuel inlet (4-1) and a fuel and wastewater outlet (4-3) of a three-way valve (4) are respectively connected with the fuel outlet pipe (3) and the fuel and wastewater outlet pipe (5), the first oxidant inlet pipe (6) is connected with an inlet of a second stop valve (7), an outlet of the second stop valve (7) is connected with a first oxidant outlet pipe (8), the fuel and wastewater outlet pipe (5) and the first oxidant outlet pipe (8) are welded at the upper end of an inclined pipe end cover (9) at a certain angle, and the electric heating plug (10) is connected at the center of the inclined pipe end cover (9) through threads;
the reaction zone consists of a three-way valve (4), a fuel and wastewater outlet pipe (5), a first oxidant inlet pipe (6), a second stop valve (7), a first oxidant outlet pipe (8), an inclined pipe end cover (9), a wastewater inlet pipe (11), a third stop valve (12), a wastewater outlet pipe (13), a reaction inclined pipe (14), a T-shaped porous lining pipe (15), an inclined pipe boss (16), a second oxidant inlet pipe (17), a fourth stop valve (18) and a second oxidant outlet pipe (19),
the waste water inlet pipe (11) is connected with the inlet of a third stop valve (12), the outlet of the third stop valve (12) is connected with a waste water outlet pipe (13), the waste water outlet pipe (13) is connected with a waste water inlet (4-3) of the three-way valve (4), an inclined tube end cover (9) is arranged at the upper end of the reaction inclined tube (14), a T-shaped porous lining tube (15) is arranged in the reaction inclined tube (14), the upper end of the T-shaped porous lining pipe (15) is a boss end, the inner side of the reaction inclined pipe (14) is provided with an inclined pipe boss (16), the second oxidant inlet pipe (17) is connected with the inlet of a fourth stop valve (18), the outlet of the fourth stop valve (18) is connected with a second oxidant outlet pipe (19), the second oxidant outlet pipe (19) is welded on the lower side surface of the reaction inclined pipe (14);
the separation area mainly comprises a straight pipe end cover (20), a separation straight pipe (21), an exhaust pipe (22), a first electric ball valve (23), a salt discharge pipe (24) and a second electric ball valve (25),
a straight pipe end cover (20) is arranged at the upper end of the separation straight pipe (21), the exhaust pipe (22) is welded at the center of the straight pipe end cover (20), the lower end of the separation straight pipe (21) is connected with an inlet of a first electric ball valve (23) through a flange, an outlet of the first electric ball valve (23) is connected with an inlet of a salt discharge pipe (24) through a flange, an outlet of the salt discharge pipe (24) is connected with an inlet of a second electric ball valve (25) through a flange, and an outlet of the second electric ball valve (25) is a brine discharge port;
the reaction inclined tube (14) and the separation straight tube (21) are welded at a certain inclination angle, and the middle part of the separation straight tube (21) is provided with an opening for inserting the T-shaped porous lining tube (15), so that a product in the reaction inclined tube (14) can flow into the separation straight tube (21).
The highest working pressure of each component in the ignition region, the reaction region and the separation region is 30MPa, wherein the highest working temperature of the T-shaped porous lining pipe (15) in the reaction region is 1200 ℃, and the highest working temperature of the rest components in the reaction region and the separation region is 700 ℃.
The T-shaped porous lining pipe (15) is made of one of zirconia, alumina and silicon carbide.
The oxidant is selected from air, oxygen, hydrogen peroxide and KClO3Solution, KMnO4One of the solutions.
The fuel is selected from one of gasoline, kerosene, methanol and ethanol.
The invention has the advantages that:
1. the invention utilizes the heat of the heating core of the electric heating plug (10) to ignite the fuel in the reaction inclined tube (14), so that the temperature in the reaction zone quickly meets the reaction requirement, and the quick preheating and high-efficiency degradation of the organic waste liquid are realized;
2. the fuel does not need to be preheated at high temperature in the whole heating process, so that the investment and the energy consumption of equipment are reduced;
3. through the switch of adjusting the first electric ball valve (23) of separation straight tube (21) lower extreme, second electric ball valve (25), can realize the automatic salt discharge of reactor, produce when avoiding adopting the cooling water cooling desalination and contain salt sewage, be favorable to the continuous operation and the zero release of reactor, satisfy the industrial treatment demand.
Drawings
FIG. 1 is a schematic structural diagram of a brine accumulation process of the glow plug ignition internal combustion type supercritical water oxidation device.
FIG. 2 is a schematic structural diagram of a brine discharge process of the glow plug ignition internal combustion type supercritical water oxidation device.
In the figure: 1. a fuel inlet pipe; 2. a first shut-off valve; 3. a fuel outlet pipe; 4. a three-way valve; 4-1, a fuel inlet; 4-2, fuel and waste water outlet; 4-3, a wastewater inlet; 5. a fuel and wastewater outlet pipe; 6. a first oxidant inlet tube; 7. a second stop valve; 8. a first oxidant outlet conduit; 9. an inclined tube end cover; 10. a glow plug; 11. a waste water inlet pipe; 12. a third stop valve; 13. a waste water outlet pipe; 14. a reaction inclined tube; 15. a T-shaped porous lining tube; 16. a pipe chute boss; 17. a second oxidant inlet pipe; 18. a fourth stop valve; 19. a second oxidant outlet pipe; 20. a straight tube end cover; 21. separating the straight pipe; 22. an exhaust pipe; 23. a first electrically powered ball valve; 24. a salt discharge pipe; 25. a second electrically operated ball valve.
Detailed Description
The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.
As shown in fig. 1, the present invention provides a glow plug ignition internal combustion type continuous supercritical water oxidation apparatus, comprising: the device comprises an ignition region, a reaction region and a separation region.
Example 1:
in this example, the organic content in the waste liquid was 4%.
In the embodiment, air is used as the oxidant, gasoline is used as the fuel, and zirconia is used as the material of the T-shaped porous lining pipe (15).
In this example, the amount of the oxidant used was 2 times the theoretical oxygen demand when the organic matter in the wastewater was completely oxidized.
The specific flow of this example is as follows:
1. ignition heating process: when the device starts to operate, all valves are closed, the glow plug (10) is connected with a power supply, a heating core on the glow plug (10) starts to heat up, when the temperature rises to 1100 ℃, the first stop valve (2), the second stop valve (7), the first electric ball valve (23) and the fourth stop valve (18) are opened, fuel and air which are not preheated and have the pressure of 1MPa are respectively sprayed onto the heating core of the glow plug (10) through the fuel and wastewater outlet pipe (5) and the oxidant outlet pipe (8) at a certain angle, the fuel is ignited, the temperature in the reaction inclined pipe (14) rapidly rises, meanwhile, the air which is not preheated and have the pressure of 1MPa enters the reaction inclined pipe (14) through the second oxidant outlet pipe (19), and the inner wall of the inclined pipe is prevented from overheating.
SCWO reaction process: when the temperature in the reaction inclined tube (14) rises to 600 ℃, the glow plug (10) cuts off the power supply, the first stop valve (2) is closed, the third stop valve (12) is opened, air which is not preheated and has the pressure of 23MPa and organic wastewater respectively enter the reaction inclined tube (14) through the oxidant outlet tube (8) and the fuel and wastewater outlet tube (5) to carry out SCWO reaction, and the temperature required by the reaction can be maintained by self-oxidation heat release in the reaction process because the content of organic matters reaches more than 2 percent. At the same time, the air pressure at the second oxidant outlet pipe (19) rises to 23MPa, acting as a permeate fluid, forming a protective gas film on the inner surface of the T-shaped porous lined pipe (15), minimizing corrosion and salt deposition problems caused by the reaction, and acting as an oxidant for SCWO. After entering the reaction inclined tube (14), the materials flow downwards along the T-shaped porous lining tube (15), and SCWO reaction occurs in the process.
3. And (3) a separation process: when the reaction product reaches the end of the T-shaped porous liner tube (15), it flows into the straight separation tube (21). Under the action of gravity, the reaction products separate into a clean upflowing supercritical fluid (water and gas free of solid particles) and a downflowing brine (salt and solid particles and water). Supercritical fluid is discharged by blast pipe (22) at separation straight tube (21) top, and salt solution flows into row salt pipe (24) behind first electronic ball valve (23), piles up to second electronic ball valve (25) entry, and along with the reaction goes on, the liquid level of salt solution in row salt pipe (24) constantly rises, and when the liquid level reached a take the altitude, first electronic ball valve (23) were closed, and second electronic ball valve (25) are opened, and salt solution is discharged by second electronic ball valve (25) export.
In the embodiment, the COD of the reaction product is less than 30mg/L, and the industrial emission requirement is met.
Example 2:
in this example, the organic content in the waste liquid was 4%.
In the embodiment, air is used as the oxidant, gasoline is used as the fuel, and zirconia is used as the material of the T-shaped porous lining pipe (15).
In this example, the amount of the oxidant used was 2 times the theoretical oxygen demand when the organic matter in the wastewater was completely oxidized.
The specific flow of this example is as follows:
1. ignition heating process: when the device starts to operate, all valves are closed, the glow plug (10) is connected with a power supply, a heating core on the glow plug (10) starts to heat up, when the temperature rises to 1100 ℃, the first stop valve (2), the second stop valve (7), the first electric ball valve (23) and the fourth stop valve (18) are opened, fuel and air which are not preheated and have the pressure of 1MPa are respectively sprayed onto the heating core of the glow plug (10) through the fuel and wastewater outlet pipe (5) and the oxidant outlet pipe (8) at a certain angle, the fuel is ignited, the temperature in the reaction inclined pipe (14) rapidly rises, meanwhile, the air which is not preheated and have the pressure of 1MPa enters the reaction inclined pipe (14) through the second oxidant outlet pipe (19), and the inner wall of the inclined pipe is prevented from overheating.
SCWO reaction process: when the temperature in the reaction inclined tube (14) rises to 600 ℃, the glow plug (10) cuts off the power supply, the first stop valve (2) is closed, the third stop valve (12) is opened, air and organic wastewater which are not preheated and have the pressure of 30MPa enter the reaction inclined tube (14) through the oxidant outlet pipe (8) and the fuel and wastewater outlet pipe (5) respectively to carry out SCWO reaction, and the temperature required by the reaction can be maintained by self-oxidation heat release in the reaction process because the content of organic matters reaches more than 2 percent. At the same time, the air pressure at the second oxidant outlet pipe (19) rises to 30MPa, acting as a permeate fluid, forming a protective gas film on the inner surface of the T-shaped porous lined pipe (15), minimizing corrosion and salt deposition problems caused by the reaction, and acting as an oxidant for SCWO. After entering the reaction inclined tube (14), the materials flow downwards along the T-shaped porous lining tube (15), and SCWO reaction occurs in the process.
3. And (3) a separation process: when the reaction product reaches the end of the T-shaped porous liner tube (15), it flows into the straight separation tube (21). Under the action of gravity, the reaction products separate into a clean upflowing supercritical fluid (water and gas free of solid particles) and a downflowing brine (salt and solid particles and water). Supercritical fluid is discharged by blast pipe (22) at separation straight tube (21) top, and salt solution flows into row salt pipe (24) behind first electronic ball valve (23), piles up to second electronic ball valve (25) entry, and along with the reaction goes on, the liquid level of salt solution in row salt pipe (24) constantly rises, and when the liquid level reached a take the altitude, first electronic ball valve (23) were closed, and second electronic ball valve (25) are opened, and salt solution is discharged by second electronic ball valve (25) export.
In the embodiment, the COD of the reaction product is less than 30mg/L, and the industrial emission requirement is met.
Example 3:
in this example, the organic content in the waste liquid was 4%.
In the embodiment, air is used as the oxidant, gasoline is used as the fuel, and zirconia is used as the material of the T-shaped porous lining pipe (15).
In this example, the amount of the oxidant used was 2 times the theoretical oxygen demand when the organic matter in the wastewater was completely oxidized.
The specific flow of this example is as follows:
1. ignition heating process: when the device starts to operate, all valves are closed, the glow plug (10) is connected with a power supply, a heating core on the glow plug (10) starts to heat up, when the temperature rises to 1100 ℃, the first stop valve (2), the second stop valve (7), the first electric ball valve (23) and the fourth stop valve (18) are opened, fuel and air which are not preheated and have the pressure of 1MPa are respectively sprayed onto the heating core of the glow plug (10) through the fuel and wastewater outlet pipe (5) and the oxidant outlet pipe (8) at a certain angle, the fuel is ignited, the temperature in the reaction inclined pipe (14) rapidly rises, meanwhile, the air which is not preheated and have the pressure of 1MPa enters the reaction inclined pipe (14) through the second oxidant outlet pipe (19), and the inner wall of the inclined pipe is prevented from overheating.
SCWO reaction process: when the temperature in the reaction inclined tube (14) rises to 550 ℃, the glow plug (10) cuts off the power supply, the first stop valve (2) is closed, the third stop valve (12) is opened, air which is not preheated and has the pressure of 23MPa and organic wastewater respectively enter the reaction inclined tube (14) through the oxidant outlet pipe (8) and the fuel and wastewater outlet pipe (5) to carry out SCWO reaction, and the temperature required by the reaction can be maintained by self-oxidation heat release in the reaction process because the content of organic matters reaches more than 2 percent. At the same time, the air pressure at the second oxidant outlet pipe (19) rises to 23MPa, acting as a permeate fluid, forming a protective gas film on the inner surface of the T-shaped porous lined pipe (15), minimizing corrosion and salt deposition problems caused by the reaction, and acting as an oxidant for SCWO. After entering the reaction inclined tube (14), the materials flow downwards along the T-shaped porous lining tube (15), and SCWO reaction occurs in the process.
3. And (3) a separation process: when the reaction product reaches the end of the T-shaped porous liner tube (15), it flows into the straight separation tube (21). Under the action of gravity, the reaction products separate into a clean upflowing supercritical fluid (water and gas free of solid particles) and a downflowing brine (salt and solid particles and water). Supercritical fluid is discharged by blast pipe (22) at separation straight tube (21) top, and salt solution flows into row salt pipe (24) behind first electronic ball valve (23), piles up to second electronic ball valve (25) entry, and along with the reaction goes on, the liquid level of salt solution in row salt pipe (24) constantly rises, and when the liquid level reached a take the altitude, first electronic ball valve (23) were closed, and second electronic ball valve (25) are opened, and salt solution is discharged by second electronic ball valve (25) export.
In the embodiment, the COD of the reaction product is less than 30mg/L, and the industrial emission requirement is met.
Example 4:
in this example, the organic content in the waste liquid was 4%.
In the embodiment, air is used as the oxidant, gasoline is used as the fuel, and zirconia is used as the material of the T-shaped porous lining pipe (15).
In this example, the amount of the oxidant used was 2 times the theoretical oxygen demand when the organic matter in the wastewater was completely oxidized.
The specific flow of this example is as follows:
1. ignition heating process: when the device starts to operate, all valves are closed, the glow plug (10) is connected with a power supply, a heating core on the glow plug (10) starts to heat up, when the temperature rises to 1100 ℃, the first stop valve (2), the second stop valve (7), the first electric ball valve (23) and the fourth stop valve (18) are opened, fuel and air which are not preheated and have the pressure of 1MPa are respectively sprayed onto the heating core of the glow plug (10) through the fuel and wastewater outlet pipe (5) and the oxidant outlet pipe (8) at a certain angle, the fuel is ignited, the temperature in the reaction inclined pipe (14) rapidly rises, meanwhile, the air which is not preheated and have the pressure of 1MPa enters the reaction inclined pipe (14) through the second oxidant outlet pipe (19), and the inner wall of the inclined pipe is prevented from overheating.
SCWO reaction process: when the temperature in the reaction inclined tube (14) rises to 550 ℃, the glow plug (10) cuts off the power supply, the first stop valve (2) is closed, the third stop valve (12) is opened, air and organic wastewater which are not preheated and have the pressure of 30MPa enter the reaction inclined tube (14) through the oxidant outlet pipe (8) and the fuel and wastewater outlet pipe (5) respectively to carry out SCWO reaction, and the temperature required by the reaction can be maintained by self-oxidation heat release in the reaction process because the content of organic matters reaches more than 2 percent. At the same time, the air pressure at the second oxidant outlet pipe (19) rises to 30MPa, acting as a permeate fluid, forming a protective gas film on the inner surface of the T-shaped porous lined pipe (15), minimizing corrosion and salt deposition problems caused by the reaction, and acting as an oxidant for SCWO. After entering the reaction inclined tube (14), the materials flow downwards along the T-shaped porous lining tube (15), and SCWO reaction occurs in the process.
3. And (3) a separation process: when the reaction product reaches the end of the T-shaped porous liner tube (15), it flows into the straight separation tube (21). Under the action of gravity, the reaction products separate into a clean upflowing supercritical fluid (water and gas free of solid particles) and a downflowing brine (salt and solid particles and water). Supercritical fluid is discharged by blast pipe (22) at separation straight tube (21) top, and salt solution flows into row salt pipe (24) behind first electronic ball valve (23), piles up to second electronic ball valve (25) entry, and along with the reaction goes on, the liquid level of salt solution in row salt pipe (24) constantly rises, and when the liquid level reached a take the altitude, first electronic ball valve (23) were closed, and second electronic ball valve (25) are opened, and salt solution is discharged by second electronic ball valve (25) export.
In the embodiment, the COD of the reaction product is less than 30mg/L, and the industrial emission requirement is met.
Example 5:
in this example, the organic content in the waste liquid was 1%.
In the embodiment, air is used as the oxidant, gasoline is used as the fuel, and zirconia is used as the material of the T-shaped porous lining pipe (15).
In this example, the amount of the oxidant used was 2 times the theoretical oxygen demand when the organic matter in the wastewater was completely oxidized.
The specific flow of this example is as follows:
1. ignition heating process: when the device starts to operate, all valves are closed, the glow plug (10) is connected with a power supply, a heating core on the glow plug (10) starts to heat up, when the temperature rises to 1100 ℃, the first stop valve (2), the second stop valve (7), the first electric ball valve (23) and the fourth stop valve (18) are opened, fuel and air which are not preheated and have the pressure of 1MPa are respectively sprayed onto the heating core of the glow plug (10) through the fuel and wastewater outlet pipe (5) and the oxidant outlet pipe (8) at a certain angle, the fuel is ignited, the temperature in the reaction inclined pipe (14) rapidly rises, meanwhile, the air which is not preheated and have the pressure of 1MPa enters the reaction inclined pipe (14) through the second oxidant outlet pipe (19), and the inner wall of the inclined pipe is prevented from overheating.
SCWO reaction process: when the temperature in the reaction inclined tube (14) rises to 600 ℃, the glow plug (10) cuts off the power supply, the opening degree of the first stop valve (2) is reduced, the third stop valve (12) is opened, organic wastewater which is not preheated and has the pressure of 23MPa and certain fuel are mixed and then enter the reaction inclined tube (14) with air through the fuel and wastewater outlet tube (5) and the oxidant outlet tube (8) respectively to carry out SCWO reaction, and the organic content is less than 2 percent, so the temperature required by the reaction cannot be maintained only by self oxidation heat release in the reaction process, and therefore, the organic wastewater needs to be mixed with certain fuel before entering the reaction inclined tube (14). At the same time, the air pressure at the second oxidant outlet pipe (19) rises to 23MPa, acting as a permeate fluid, forming a protective gas film on the inner surface of the T-shaped porous lined pipe (15), minimizing corrosion and salt deposition problems caused by the reaction, and acting as an oxidant for SCWO. After entering the reaction inclined tube (14), the materials flow downwards along the T-shaped porous lining tube (15), and SCWO reaction occurs in the process.
3. And (3) a separation process: when the reaction product reaches the end of the T-shaped porous liner tube (15), it flows into the straight separation tube (21). Under the action of gravity, the reaction products separate into a clean upflowing supercritical fluid (water and gas free of solid particles) and a downflowing brine (salt and solid particles and water). Supercritical fluid is discharged by blast pipe (22) at separation straight tube (21) top, and salt solution flows into row salt pipe (24) behind first electronic ball valve (23), piles up to second electronic ball valve (25) entry, and along with the reaction goes on, the liquid level of salt solution in row salt pipe (24) constantly rises, and when the liquid level reached a take the altitude, first electronic ball valve (23) were closed, and second electronic ball valve (25) are opened, and salt solution is discharged by second electronic ball valve (25) export. The second electric ball valve (36) is opened, and the brine is discharged from the outlet of the second electric ball valve (36).
In the embodiment, the COD of the reaction product is less than 30mg/L, and the industrial emission requirement is met.
Example 6:
in this example, the organic content in the waste liquid was 1%.
In the embodiment, air is used as the oxidant, gasoline is used as the fuel, and zirconia is used as the material of the T-shaped porous lining pipe (15).
In this example, the amount of the oxidant used was 2 times the theoretical oxygen demand when the organic matter in the wastewater was completely oxidized.
The specific flow of this example is as follows:
1. ignition heating process: when the device starts to operate, all valves are closed, the glow plug (10) is connected with a power supply, a heating core on the glow plug (10) starts to heat up, when the temperature rises to 1100 ℃, the first stop valve (2), the second stop valve (7), the first electric ball valve (23) and the fourth stop valve (18) are opened, fuel and air which are not preheated and have the pressure of 1MPa are respectively sprayed onto the heating core of the glow plug (10) through the fuel and wastewater outlet pipe (5) and the oxidant outlet pipe (8) at a certain angle, the fuel is ignited, the temperature in the reaction inclined pipe (14) rapidly rises, meanwhile, the air which is not preheated and have the pressure of 1MPa enters the reaction inclined pipe (14) through the second oxidant outlet pipe (19), and the inner wall of the inclined pipe is prevented from overheating.
SCWO reaction process: when the temperature in the reaction inclined tube (14) rises to 600 ℃, the glow plug (10) cuts off the power supply, the opening degree of the first stop valve (2) is reduced, the third stop valve (12) is opened, organic wastewater which is not preheated and has the pressure of 30MPa and certain fuel are mixed and then enter the reaction inclined tube (14) with air through the fuel and wastewater outlet tube (5) and the oxidant outlet tube (8) respectively to carry out SCWO reaction, and the organic content is less than 2 percent, so the temperature required by the reaction cannot be maintained only by self oxidation heat release in the reaction process, and therefore, the organic wastewater needs to be mixed with certain fuel before entering the reaction inclined tube (14). At the same time, the air pressure at the second oxidant outlet pipe (19) rises to 30MPa, acting as a permeate fluid, forming a protective gas film on the inner surface of the T-shaped porous lined pipe (15), minimizing corrosion and salt deposition problems caused by the reaction, and acting as an oxidant for SCWO. After entering the reaction inclined tube (14), the materials flow downwards along the T-shaped porous lining tube (15), and SCWO reaction occurs in the process.
3. And (3) a separation process: when the reaction product reaches the end of the T-shaped porous liner tube (15), it flows into the straight separation tube (21). Under the action of gravity, the reaction products separate into a clean upflowing supercritical fluid (water and gas free of solid particles) and a downflowing brine (salt and solid particles and water). Supercritical fluid is discharged by blast pipe (22) at separation straight tube (21) top, and salt solution flows into row salt pipe (24) behind first electronic ball valve (23), piles up to second electronic ball valve (25) entry, and along with the reaction goes on, the liquid level of salt solution in row salt pipe (24) constantly rises, and when the liquid level reached a take the altitude, first electronic ball valve (23) were closed, and second electronic ball valve (25) are opened, and salt solution is discharged by second electronic ball valve (25) export. The second electric ball valve (36) is opened, and the brine is discharged from the outlet of the second electric ball valve (36).
In the embodiment, the COD of the reaction product is less than 30mg/L, and the industrial emission requirement is met.
Example 7:
in this example, the organic content in the waste liquid was 1%.
In the embodiment, air is used as the oxidant, gasoline is used as the fuel, and zirconia is used as the material of the T-shaped porous lining pipe (15).
In this example, the amount of the oxidant used was 2 times the theoretical oxygen demand when the organic matter in the wastewater was completely oxidized.
The specific flow of this example is as follows:
1. ignition heating process: when the device starts to operate, all valves are closed, the glow plug (10) is connected with a power supply, a heating core on the glow plug (10) starts to heat up, when the temperature rises to 1100 ℃, the first stop valve (2), the second stop valve (7), the first electric ball valve (23) and the fourth stop valve (18) are opened, fuel and air which are not preheated and have the pressure of 1MPa are respectively sprayed onto the heating core of the glow plug (10) through the fuel and wastewater outlet pipe (5) and the oxidant outlet pipe (8) at a certain angle, the fuel is ignited, the temperature in the reaction inclined pipe (14) rapidly rises, meanwhile, the air which is not preheated and have the pressure of 1MPa enters the reaction inclined pipe (14) through the second oxidant outlet pipe (19), and the inner wall of the inclined pipe is prevented from overheating.
SCWO reaction process: when the temperature in the reaction inclined tube (14) rises to 550 ℃, the glow plug (10) cuts off the power supply, the opening degree of the first stop valve (2) is reduced, the third stop valve (12) is opened, organic wastewater which is not preheated and has the pressure of 23MPa and certain fuel are mixed and then enter the reaction inclined tube (14) with air through the fuel and wastewater outlet tube (5) and the oxidant outlet tube (8) respectively to carry out SCWO reaction, and the organic content is below 2 percent, so the temperature required by the reaction cannot be maintained only by self oxidation heat release in the reaction process, and therefore the organic wastewater needs to be mixed with certain fuel before entering the reaction inclined tube (14). At the same time, the air pressure at the second oxidant outlet pipe (19) rises to 23MPa, acting as a permeate fluid, forming a protective gas film on the inner surface of the T-shaped porous lined pipe (15), minimizing corrosion and salt deposition problems caused by the reaction, and acting as an oxidant for SCWO. After entering the reaction inclined tube (14), the materials flow downwards along the T-shaped porous lining tube (15), and SCWO reaction occurs in the process.
3. And (3) a separation process: when the reaction product reaches the end of the T-shaped porous liner tube (15), it flows into the straight separation tube (21). Under the action of gravity, the reaction products separate into a clean upflowing supercritical fluid (water and gas free of solid particles) and a downflowing brine (salt and solid particles and water). Supercritical fluid is discharged by blast pipe (22) at separation straight tube (21) top, and salt solution flows into row salt pipe (24) behind first electronic ball valve (23), piles up to second electronic ball valve (25) entry, and along with the reaction goes on, the liquid level of salt solution in row salt pipe (24) constantly rises, and when the liquid level reached a take the altitude, first electronic ball valve (23) were closed, and second electronic ball valve (25) are opened, and salt solution is discharged by second electronic ball valve (25) export. The second electric ball valve (36) is opened, and the brine is discharged from the outlet of the second electric ball valve (36).
In the embodiment, the COD of the reaction product is less than 30mg/L, and the industrial emission requirement is met.
Example 8:
in this example, the organic content in the waste liquid was 1%.
In the embodiment, air is used as the oxidant, gasoline is used as the fuel, and zirconia is used as the material of the T-shaped porous lining pipe (15).
In this example, the amount of the oxidant used was 2 times the theoretical oxygen demand when the organic matter in the wastewater was completely oxidized.
The specific flow of this example is as follows:
1. ignition heating process: when the device starts to operate, all valves are closed, the glow plug (10) is connected with a power supply, a heating core on the glow plug (10) starts to heat up, when the temperature rises to 1100 ℃, the first stop valve (2), the second stop valve (7), the first electric ball valve (23) and the fourth stop valve (18) are opened, fuel and air which are not preheated and have the pressure of 1MPa are respectively sprayed onto the heating core of the glow plug (10) through the fuel and wastewater outlet pipe (5) and the oxidant outlet pipe (8) at a certain angle, the fuel is ignited, the temperature in the reaction inclined pipe (14) rapidly rises, meanwhile, the air which is not preheated and have the pressure of 1MPa enters the reaction inclined pipe (14) through the second oxidant outlet pipe (19), and the inner wall of the inclined pipe is prevented from overheating.
SCWO reaction process: when the temperature in the reaction inclined tube (14) rises to 550 ℃, the glow plug (10) cuts off the power supply, the opening degree of the first stop valve (2) is reduced, the third stop valve (12) is opened, organic wastewater which is not preheated and has the pressure of 30MPa and certain fuel are mixed and then enter the reaction inclined tube (14) with air through the fuel and wastewater outlet tube (5) and the oxidant outlet tube (8) respectively to carry out SCWO reaction, and because the content of organic matters is below 2 percent, the temperature required by the reaction cannot be maintained only by self oxidation heat release in the reaction process, the organic wastewater needs to be mixed with certain fuel before entering the reaction inclined tube (14). At the same time, the air pressure at the second oxidant outlet pipe (19) rises to 30MPa, acting as a permeate fluid, forming a protective gas film on the inner surface of the T-shaped porous lined pipe (15), minimizing corrosion and salt deposition problems caused by the reaction, and acting as an oxidant for SCWO. After entering the reaction inclined tube (14), the materials flow downwards along the T-shaped porous lining tube (15), and SCWO reaction occurs in the process.
3. And (3) a separation process: when the reaction product reaches the end of the T-shaped porous liner tube (15), it flows into the straight separation tube (21). Under the action of gravity, the reaction products separate into a clean upflowing supercritical fluid (water and gas free of solid particles) and a downflowing brine (salt and solid particles and water). Supercritical fluid is discharged by blast pipe (22) at separation straight tube (21) top, and salt solution flows into row salt pipe (24) behind first electronic ball valve (23), piles up to second electronic ball valve (25) entry, and along with the reaction goes on, the liquid level of salt solution in row salt pipe (24) constantly rises, and when the liquid level reached a take the altitude, first electronic ball valve (23) were closed, and second electronic ball valve (25) are opened, and salt solution is discharged by second electronic ball valve (25) export. The second electric ball valve (36) is opened, and the brine is discharged from the outlet of the second electric ball valve (36).
In the embodiment, the COD of the reaction product is less than 30mg/L, and the industrial emission requirement is met.
Claims (5)
1. The utility model provides a continuous supercritical water oxidation device of glow plug ignition internal combustion type which characterized in that includes: an ignition region, a reaction region and a separation region,
the ignition region consists of a fuel inlet pipe (1), a first stop valve (2), a fuel outlet pipe (3), a three-way valve (4), a fuel and wastewater outlet pipe (5), a first oxidant inlet pipe (6), a second stop valve (7), a first oxidant outlet pipe (8), an inclined pipe end cover (9) and a glow plug (10),
the fuel inlet pipe (1) is connected with an inlet of a first stop valve (2), an outlet of the first stop valve (2) is connected with a fuel outlet pipe (3), a fuel inlet (4-1) and a fuel and wastewater outlet (4-3) of a three-way valve (4) are respectively connected with the fuel outlet pipe (3) and the fuel and wastewater outlet pipe (5), the first oxidant inlet pipe (6) is connected with an inlet of a second stop valve (7), an outlet of the second stop valve (7) is connected with a first oxidant outlet pipe (8), the fuel and wastewater outlet pipe (5) and the first oxidant outlet pipe (8) are welded at the upper end of an inclined pipe end cover (9) at a certain angle, and the electric heating plug (10) is connected at the center of the inclined pipe end cover (9) through threads;
the reaction zone consists of a three-way valve (4), a fuel and wastewater outlet pipe (5), a first oxidant inlet pipe (6), a second stop valve (7), a first oxidant outlet pipe (8), an inclined pipe end cover (9), a wastewater inlet pipe (11), a third stop valve (12), a wastewater outlet pipe (13), a reaction inclined pipe (14), a T-shaped porous lining pipe (15), an inclined pipe boss (16), a second oxidant inlet pipe (17), a fourth stop valve (18) and a second oxidant outlet pipe (19),
the waste water inlet pipe (11) is connected with the inlet of a third stop valve (12), the outlet of the third stop valve (12) is connected with a waste water outlet pipe (13), the waste water outlet pipe (13) is connected with a waste water inlet (4-3) of the three-way valve (4), an inclined tube end cover (9) is arranged at the upper end of the reaction inclined tube (14), a T-shaped porous lining tube (15) is arranged in the reaction inclined tube (14), the upper end of the T-shaped porous lining pipe (15) is a boss end, the inner side of the reaction inclined pipe (14) is provided with an inclined pipe boss (16), the second oxidant inlet pipe (17) is connected with the inlet of a fourth stop valve (18), the outlet of the fourth stop valve (18) is connected with a second oxidant outlet pipe (19), the second oxidant outlet pipe (19) is welded on the lower side surface of the reaction inclined pipe (14);
the separation area mainly comprises a straight pipe end cover (20), a separation straight pipe (21), an exhaust pipe (22), a first electric ball valve (23), a salt discharge pipe (24) and a second electric ball valve (25),
a straight pipe end cover (20) is arranged at the upper end of the separation straight pipe (21), the exhaust pipe (22) is welded at the center of the straight pipe end cover (20), the lower end of the separation straight pipe (21) is connected with an inlet of a first electric ball valve (23) through a flange, an outlet of the first electric ball valve (23) is connected with an inlet of a salt discharge pipe (24) through a flange, an outlet of the salt discharge pipe (24) is connected with an inlet of a second electric ball valve (25) through a flange, and an outlet of the second electric ball valve (25) is a brine discharge port;
the reaction inclined tube (14) and the separation straight tube (21) are welded at a certain inclination angle, and the middle part of the separation straight tube (21) is provided with an opening for inserting the T-shaped porous lining tube (15), so that a product in the reaction inclined tube (14) can flow into the separation straight tube (21).
2. The glow-plug ignition internal combustion type continuous supercritical water oxidation apparatus according to claim 1, wherein:
the highest working pressure of each component in the ignition region, the reaction region and the separation region is 30MPa, wherein the highest working temperature of the T-shaped porous lining pipe (15) in the reaction region is 1200 ℃, and the highest working temperature of the rest components in the reaction region and the separation region is 700 ℃.
3. The glow-plug ignition internal combustion type continuous supercritical water oxidation apparatus according to claim 1, wherein:
the T-shaped porous lining pipe (15) is made of one of zirconia, alumina and silicon carbide.
4. The glow-plug ignition internal combustion type continuous supercritical water oxidation apparatus according to claim 1, wherein:
the oxidant is selected from air, oxygen, hydrogen peroxide and KClO3Solution, KMnO4One of the solutions.
5. The glow-plug ignition internal combustion type continuous supercritical water oxidation apparatus according to claim 1, wherein:
the fuel is selected from one of gasoline, kerosene, methanol and ethanol.
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| CN202010977394.1A CN111943349A (en) | 2020-09-17 | 2020-09-17 | Glow plug ignition internal combustion type continuous supercritical water oxidation device |
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| CN202010977394.1A CN111943349A (en) | 2020-09-17 | 2020-09-17 | Glow plug ignition internal combustion type continuous supercritical water oxidation device |
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