CN107601643A - A kind of supercritical water oxidation processing Salt discharge method - Google Patents
A kind of supercritical water oxidation processing Salt discharge method Download PDFInfo
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- CN107601643A CN107601643A CN201710824126.4A CN201710824126A CN107601643A CN 107601643 A CN107601643 A CN 107601643A CN 201710824126 A CN201710824126 A CN 201710824126A CN 107601643 A CN107601643 A CN 107601643A
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Abstract
The invention discloses a kind of supercritical water oxidation processing Salt discharge method.Method is pressurized with subcritical material after additive is pressurized, is sufficiently mixed dissolving in blender after preheating；Reacted after mixed dissolution through preheating to be sent into tubular reactor again with High Pressure Air Compressor compressed air, obtain product.Product is exchanged heat into heat exchanger with soft water, and product cools down into heat exchanger product, and product enters follow-up cooling and Separate System of Water-jet by product exit after cooling after cooling.The features of the present invention：By setting two-stage preheater, inorganic salts are added in material warm, utilize the characteristic of salt-mixture low melting point, mobile phase is formed, without extra operating process, simplifies system operation flow and system architecture, and constantly monitor mineralization situation, the addition of adjust automatically additive, the blocking risk of system is effectively reduced, ensure that the safety and stability of equipment.
Description
Technical field
The present invention relates to the supercritical water treatment field of waste organic matter, is used more particularly to a kind of processing of supercritical water oxidation
Salt discharge method.
Background technology
Supercritical water oxidation (Supercritical Water Oxidation, abbreviation SCWO) technology is a kind of can be achieved
A variety of debirs are carried out with the technology of deep oxidation processing.In supercritical water, organic matter can be with air, O2Etc. nonpolarity gas
The miscible formation homogeneous reaction system of body, realize the efficient fast decoupled of organic matter, generation small molecule product H2O、CO2And N2。
Although at normal temperatures and pressures, solubility of most of salts in water is larger, typically in tens~100g/L or so,
But in critical, solubility of the inorganic salts in water significantly reduces, typically in (1~100) × 10-6(mass fraction).Cause
This, typically is easy to separate out from supercritical water in inorganic salts.In the SCWO processing units of related debirs, inorganic salts etc.
Equipment caused by precipitation and line clogging problem are one of biggest obstacles for influenceing supercritical water treatment technology commercialization.
At present, in supercritical water treatment industrial applications system, generally it can reach overcritical in preheater or reactor
State.According to the solubility studies of a variety of salt, when being heated to 350~400 DEG C, the inorganic salts being previously dissolved in water will be tied
Partial crystallization goes out, and causes the blocking of heater, reactor and other systems pipeline.It is inorganic to salt out caused by deposition that block not only shadow
The thermal efficiency of heating furnace or reactor is rung, the safe operation of whole super critical water treatment system can be influenceed when serious.
Mechanical removal, gravity removing, evaporation wall removing, cooling (alternating temperature) are concentrated mainly on currently for SCWO Salt discharge methods
Removing, and machinery and gravity removal methods system architecture complexity are high, increase the unstability of system.Evaporation wall removing side
Method is mainly used on tank reactor, but is difficult to apply for tubular reactor, and tubular type is more held relative to tank reactor
Easily realize that scale is amplified, but lack effective desalination Salt discharge method.Therefore there is an urgent need to a kind of for the just high of tubular reactor
Imitate salt discharge anti-blockage method.
The content of the invention
In order to overcome the salt that the SCWO processing systems of current sludge are faced in feeding preheating stage and course of reaction
Deposition problems, patent of the present invention provide a kind of supercritical water oxidation processing Salt discharge method.This method can make in reactor
Salt-mixture in the form of molten condition with liquid product discharge reaction system, reduce block risk.
Technical scheme is used by the present invention solves above-mentioned technical problem：
A kind of supercritical water oxidation processing Salt discharge method, two-stage preheater is designed, additive is with subcritical material mixed
Clutch is sufficiently mixed dissolving, reduces the fusing point of salt-mixture, salt-mixture is mutually flowed through the supercritical range of system with melt-flow, together
When set differential manometer to monitor pressure difference before and after two level preheater, the frequency of additive pump is adjusted according to differential pressure conditions, Salt discharge method is easy
Row is efficient.Supercritical water oxidation system is pre- by additive high-pressure frequency-conversion plunger pump 1, surge tank 2, material high-pressure plunger pump 3, one-level
Hot device 4, blender 5, differential manometer 6, two level preheater 7, High Pressure Air Compressor 8, tubular reactor 9, heat exchanger 10, softening water inlet
11st, steam (vapor) outlet 12, coolant outlet 13 are formed.Specifically operate according to the following steps：
1. additive is pressurized input surge tank 2 by high-pressure frequency-conversion plunger pump 1, the additive is low melting point and stablized just
Phosphate or hydrophosphate, the 15%~45% of salt-mixture total amount is accounted for, salt-mixture is original inorganic salts and orthophosphoric acid in material
Salt or hydrophosphate form salt-mixture.
2. material is pressurized the preheating material of input one-level preheater 4 by high-pressure plunger pump 3, material is subcritical material.
The material after 3. the additive after step 1 buffering preheats with step 2 mixes in blender 5, additive and material
Preheated after blender is sufficiently mixed dissolving into two level preheater 7, the additive after being preheated is with material in mixture.
4. step 3 mixture is sent into tubular reactor 9, while the compressed air of High Pressure Air Compressor 8 is paramount is pressed into anti-
Device 9 is answered, the two is chemically reacted, and obtains product.
5. product is exchanged heat into heat exchanger 10 with soft water, soft water enters heat exchanger 10, soft water from softening water inlet 11
Steam is produced after heating, steam is discharged from steam (vapor) outlet 11；Product cools down into the product of heat exchanger 10, and product passes through cold after cooling
But product exit 13 enters follow-up cooling and Separate System of Water-jet after.
A kind of above-mentioned supercritical water oxidation processing Salt discharge method, sets blender, in Asia among two-stage preheater
Additive is added under critical condition, is avoided that low-temperature space tubing corrodes because of high salt concentration, and can utilizes the Gao Rong of subcritical water
Xie Xing, realize being sufficiently mixed for two kinds of salt.
A kind of above-mentioned supercritical water oxidation processing Salt discharge method, differential manometer is set before and after across supercritical temperature area,
Based on pressure difference situation of change, the addition of additive is automatically adjusted, the automatic monitoring and control of system salt discharge can be realized.
The features of the present invention and advantage are：By setting two-stage preheater, inorganic salts are added in material warm,
Using the characteristic of salt-mixture low melting point, mobile phase is formed, without extra operating process, simplifies system operation flow and system knot
Structure, and mineralization situation is constantly monitored, the addition of adjust automatically additive, the blocking risk of system is effectively reduced, ensure that
The safety and stability of equipment.
Brief description of the drawings
Fig. 1 is the structural representation of supercritical water oxidation system of the present invention.
In figure：Additive high-pressure frequency-conversion plunger pump 1, surge tank 2, material high-pressure plunger pump 3, one-level preheater 4, blender
5th, differential manometer 6, two level preheater 7, High Pressure Air Compressor 8, tubular reactor 9, heat exchanger 10, softening water inlet 11, steam (vapor) outlet
12nd, product exit 13 after cooling down.
Embodiment
The present invention is described in more detail with specific implementation below in conjunction with the accompanying drawings.
Supercritical water oxidation system of the present invention as shown in figure 1, supercritical water oxidation system by additive high-pressure frequency-conversion plunger
Pump 1, surge tank 2, material high-pressure plunger pump 3, one-level preheater 4, blender 5, differential manometer 6, two level preheater 7, high pressure pneumatics
Machine 8, tubular reactor 9, heat exchanger 10, softening water inlet 11, steam (vapor) outlet 12, coolant outlet 13 are formed.
Present invention specific implementation：Material is by the supercharging input one-level of high-pressure plunger pump 3 preheater 4, and additive is through high voltage variable
The supercharging input surge tank 2 of frequency plunger pump 1, enters blender after one-level preheater 4 is heated to undercritical conditions with additive
5, subcritical material and the blended device 5 of additive into two level preheater 7 are heated to supercriticality after being sufficiently mixed, and are heated to
The material of supercriticality enters back into tubular reactor 9, and wherein two level preheater 7 is front and rear sets difference gauge 6, and differential manometer 6 is with adding
Add the frequency association of agent high-pressure frequency-conversion plunger pump 1, the working frequency of frequency conversion plunger pump is adjusted according to pressure difference.High Pressure Air Compressor 8 compresses
Air is paramount to be pressed into reactor 9, is cooled down after reaction into heat exchanger 10, the softened water inlet 11 of softened water enters heat exchanger
10, produce steam and discharged through steam (vapor) outlet 12, product exit 13 enters follow-up cooling and gas-liquid point to product after cooling after cooling
From system.
Claims (3)
- A kind of 1. supercritical water oxidation processing Salt discharge method, it is characterised in that design two-stage preheater, additive with it is subcritical Material is sufficiently mixed dissolving in blender, reduces the fusing point of salt-mixture, salt-mixture is mutually flowed through the super of system with melt-flow and faces Battery limit (BL) domain, while pressure difference before and after differential manometer monitoring two level preheater is set, the frequency of additive pump, row are adjusted according to differential pressure conditions Salt is easy to implement the method efficiently；Supercritical water oxidation system is by additive high-pressure frequency-conversion plunger pump (1), surge tank (2), material high-pressure column It is anti-to fill in pump (3), one-level preheater (4), blender (5), differential manometer (6), two level preheater (7), High Pressure Air Compressor (8), tubular type Device (9), heat exchanger (10), softening water inlet (11), steam (vapor) outlet (12), coolant outlet (13) is answered to form；Specifically by following Step operation：1) additive is pressurized input surge tank (2) by high-pressure frequency-conversion plunger pump (1), and the additive is low melting point and stablized just Phosphate or hydrophosphate, the 15%~45% of salt-mixture total amount is accounted for, salt-mixture is original inorganic salts and orthophosphoric acid in material Salt or hydrophosphate form salt-mixture；2) material is pressurized input one-level preheater (4) preheating material by high-pressure plunger pump (3), and material is subcritical material；3) material after the additive after step 1) buffering preheats with step 2) mixes in blender (5), additive and material Enter two level preheater (7) after blender is sufficiently mixed dissolving to preheat, the additive after being preheated is with material in mixture；4) step 3) mixture is sent into tubular reactor (9), while High Pressure Air Compressor (8) compressed air is paramount is pressed into anti- Device (9) is answered, the two is chemically reacted, and obtains product；5) product is exchanged heat into heat exchanger (10) with soft water, and soft water enters heat exchanger (10) from softening water inlet (11), soft Steam is produced after water heating, steam is discharged from steam (vapor) outlet (11)；Product cools down into heat exchanger (10) product, product after cooling Follow-up cooling and Separate System of Water-jet are entered by product exit after cooling 13.
- 2. a kind of supercritical water oxidation processing Salt discharge method according to claim 1, is set among two-stage preheater Blender, additive is added under undercritical conditions, be avoided that low-temperature space tubing corrodes because of high salt concentration, and can is faced using Asia The highly dissoluble of boundary's water, realize being sufficiently mixed for two kinds of salt.
- A kind of 3. supercritical water oxidation processing Salt discharge method according to claim 1, before and after across supercritical temperature area Differential manometer is set, based on pressure difference situation of change, automatically adjusts the addition of additive, can realize system salt discharge automatic monitoring and Control.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710824126.4A CN107601643A (en) | 2017-09-13 | 2017-09-13 | A kind of supercritical water oxidation processing Salt discharge method |
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| CN201710824126.4A CN107601643A (en) | 2017-09-13 | 2017-09-13 | A kind of supercritical water oxidation processing Salt discharge method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114790027A (en) * | 2022-04-29 | 2022-07-26 | 西安交通大学 | Supercritical water oxidation harmless treatment system and control method for high-salinity wastewater |
| CN114838369A (en) * | 2022-04-29 | 2022-08-02 | 西安交通大学 | Inorganic salt online desorption system and method based on supercritical hydrothermal combustion treatment |
| WO2023101984A1 (en) * | 2021-11-30 | 2023-06-08 | 374Water Inc. | Monitoring scheme and method of corrosion and fouling reduction for scwo system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5755974A (en) * | 1994-08-01 | 1998-05-26 | Rpc Waste Management Services, Inc. | Method and apparatus for reacting oxidizable matter with a salt |
-
2017
- 2017-09-13 CN CN201710824126.4A patent/CN107601643A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5755974A (en) * | 1994-08-01 | 1998-05-26 | Rpc Waste Management Services, Inc. | Method and apparatus for reacting oxidizable matter with a salt |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023101984A1 (en) * | 2021-11-30 | 2023-06-08 | 374Water Inc. | Monitoring scheme and method of corrosion and fouling reduction for scwo system |
| CN114790027A (en) * | 2022-04-29 | 2022-07-26 | 西安交通大学 | Supercritical water oxidation harmless treatment system and control method for high-salinity wastewater |
| CN114838369A (en) * | 2022-04-29 | 2022-08-02 | 西安交通大学 | Inorganic salt online desorption system and method based on supercritical hydrothermal combustion treatment |
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Application publication date: 20180119 |