CN105254146B - The supercritical water oxidation treatment system and technique of printing and dyeing sludge - Google Patents

The supercritical water oxidation treatment system and technique of printing and dyeing sludge Download PDF

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Publication number
CN105254146B
CN105254146B CN201510654532.1A CN201510654532A CN105254146B CN 105254146 B CN105254146 B CN 105254146B CN 201510654532 A CN201510654532 A CN 201510654532A CN 105254146 B CN105254146 B CN 105254146B
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sludge
outlet
tube
import
water
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CN201510654532.1A
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CN105254146A (en
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王树众
张洁
唐兴颖
钱黎黎
李艳辉
孙盼盼
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山川丽(苏州)环保科技有限公司
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00Technologies for wastewater treatment
    • Y02W10/40Valorisation of by-products of wastewater, sewage or sludge processing

Abstract

The invention discloses a kind of supercritical water oxidation treatment system of printing and dyeing sludge and technique, preheat sludge by sludge heater to reduce sewage sludge viscosity, and then improve sludge mobility;Pass through system warm-up thermal source of the auxiliary heat of methanol as startup stage, it is to avoid pipeline coking and blocking problem caused by material is directly heated;Deposition and blocking of the solid particle in system conveying pipe are prevented by controlling rate of flow of fluid, the security reliability of system operation is improved.Realize that system is depressured by way of capillary combination regulating valve, overcome abrasion or blocking of the solid particle to decompression valve under big pressure reduction conditions, and the accurate control of system pressure can be realized.The oxidation heat liberation of organic matter is reclaimed by way of preheating sludge and producing steam, cascaded utilization of energy is carried out, realizes that capacity usage ratio is maximized, lifting system economy.

Description

The supercritical water oxidation treatment system and technique of printing and dyeing sludge

【Technical field】

The invention belongs to environmental protection and chemical field, more particularly to a kind of super critical water treatment system and technique.

【Background technology】

The waste water water of textile printing and dyeing industry is big, colourity is high, change of water quality is big, biodegradability is poor., China's weaving print in 2013 The wastewater discharge of dye industry has reached 21.5 hundred million tons, accounts for the 11.2% of current year discharged volume of industrial waste water.Wherein dyeing waste water is accounted for The 80% of textile printing and dyeing industry waste water, is a kind of intractable organic industrial sewage.Traditional treatment method to dyeing waste water is main There are physico-chemical process and biological treatment.But the subject matter of traditional treatment method is in processing procedure that secondary pollution can be produced Printing and dyeing sludge, 10~30 tons of wet muds (moisture content 97%) will be produced by often handling 1000 tons of dyeing waste waters.And in printing and dyeing sludge Containing dyestuff, slurry, auxiliary agent etc., composition is extremely complex, the structure of wherein dyestuff have nitro and amino-compound and copper, chromium, The heavy metal elements such as zinc, arsenic, with larger bio-toxicity, the pollution to environment is very strong, belongs to hazardous waste.Printing and dyeing sludge is Through as one serious environmental problem of China.

At present, the method for disposal to printing and dyeing sludge includes landfill method, burning method, land use method, anaerobic digestion, wet type Oxidizing process etc..But landfill method disposal printing and dyeing sludge appropriation of land is serious, and can polluted underground water.Burning method will be consumed largely The energy, processing cost is high, and during can produce secondary pollution without NOx、SOx, bioxin etc..The compost of land use method Efficiency is low, and pollutant is also possible to enter human body by food chain.The complex process of anaerobic digestion, one-time investment is big, operation It is difficult, finally still need sanitary landfills.The reaction speed of wet oxidation process is slow, and processing is not thorough (clearance 70~90%), Also need to subsequent treatment.Therefore need to develop a kind of simple technique, high treating effect, small floor space, equipment investment and operation Expense is low, the printing and dyeing sludge novel process technique with application prospect.

Supercritical Water Oxidation Technology (Supercritical Water Oxidation, abbreviation SCWO) is super using water The special nature having under critical condition (Tc=374 DEG C, Pc=22.1MPa), is completely dissolved in organic matter and oxidant super In critical, and homogeneous oxidizing reaction occurs rapidly, rapidly, organic matter is thoroughly changed into innoxious CO2、N2、H2O etc. Micromolecular compound.Compared with the treatment technology of traditional debirs with obvious technical advantage:1) thorough, processing effect is reacted Rate is high;2) reaction system is closed, and will not produce secondary pollution.3) reaction rate is high, when organic matter is stopped needed for removing completely Between very short, therefore the small volume of reactor, the floor space of whole device is few;4), can be according to when content of organics is more than 3wt% Maintain system thermal to balance by the heat of itself release in course of reaction, be not required to extraneous addition supplemental heat, rich heat is also It can recycle.SCWO technologies are defined in one of six big fields listed by American National key technology " energy and environment " For most promising waste treatment technique.

At present, supercritical water oxidation treatment technology has been successfully applied in the disposal field to municipal sludge.2002 Chematur Engineering AB companies of Sweden develop 168m3/ d municipal sludge Supercritical water oxidation treatment device. Super Water Solutions companies of the U.S. are built up at treating capacity about 100t/d municipal sludge supercritical water oxidation within 2013 Device is managed, pollutants removal rate reaches more than 99%, fully demonstrate the feasible of supercritical Water Oxidation Technology disposal organic sludge Property.

Although supercritical Water Oxidation Technology has been achieved for very big progress, one is still suffered from terms of system reliability Serial the problem of:

(1) by supercritical water oxidation degradable organic pollutant it is necessary to by the critical point of material temperature-pressure to water More than.In addition to organic pollution self-heat generation can meet the pre- heat demand of reactor content in system normal course of operation, it is being System startup stage stills need substantial amounts of fuel supply.Existing supercritical water oxidation apparatus has typically been directly heated using gas furnace The mode of machine thing material, but macromolecule hardly degraded organic substance is typically contained in pollutant, easily tied in heating process Burnt carbon distribution reaction, produced tar or coke sticks to pipeline wall, pipe heat-transfer can be caused to deteriorate, it is also possible to cause combustion gas Stove line clogging, has had a strong impact on the safe and reliable operation of gas furnace.

(2) ionic product and dielectric constant of water are significantly reduced near supercritical region, the water of super critical condition is changed into non- Polar solvent.Not only contain insoluble inert solid in sludge, soluble inorganic salt solubility in supercritical water is obvious in addition Reduction, and then separate out from water the form presence with solid particle.These solid particles flow in systems can cause transport tube Road or equipment are blocked, and have a strong impact on the safe and reliable operation of system.In addition, insoluble inert solid is still in after cooling After reaction in fluid, when flowing through counterbalance valve decompression, system whole pressure drop is realized in a point, thus rate of flow of fluid is non-at counterbalance valve Chang Gao.Now the inert inorganic salt in fluid can cause serious abrasion or clogging to counterbalance valve, and then influence system Reliability service.

Therefore, for printing and dyeing sludge SCWO systems exploitation, it is necessary to solve the coking of system start-up phase preheating unit The abrasion blockage problem to decompression device with inert solid is blocked, and then improves the reliability and security of system.

【The content of the invention】

It is an object of the invention to provide a kind of supercritical water oxidation treatment system of printing and dyeing sludge and technique, printing and dyeing are overcome Sludge supercritical water oxidation system design when faced warm-up phase coking, solid particle block system pipeline, equipment and System is depressured insecure problem;The present invention can realize the efficient of printing and dyeing sludge, cleaning, inexpensive harmless treatment.

To achieve the above objectives, the present invention is to adopt the following technical scheme that:

The supercritical water oxidation treatment system of printing and dyeing sludge, including:Sludge pretreatment part, material regenerator section, mixing Reactive moieties;

Sludge pretreatment part includes sludge storage pool, outlet and the screw pump inlet communication, screw rod pump discharge of sludge storage pool It is connected with sludge heater case side entrance, the connection emulsifying pump inlet of sludge heater case side outlet, emulsifying pump discharge With high pressure sludge membrane pump inlet communication;

Material regenerator section starts electric heater and sludge preheater III comprising methanol, methanol start electric heater import with High-pressure methanol conveying pump discharge is connected, high-pressure methanol conveying pump inlet connection methanol solution outlet;Sludge preheater III Entrance is connected with the outlet of the outer tube of sludge preheater II, and the outer tube import of sludge preheater II is connected with the outlet of the outer tube of sludge preheater I; The outer tube import of sludge preheater I is connected with high pressure sludge membrane pump outlet;

Hybrid reaction part includes overcritical water oxidization reactor, the oxygen intake and buffering of overcritical water oxidization reactor Device outlet is connected, the outlet of buffer import connection liquid oxygen gasifier, the methanol solution import connection of overcritical water oxidization reactor Start the outlet of electric heater in methanol, the sludge import of overcritical water oxidization reactor connects with the outlet of sludge preheater III It is logical;Liquid oxygen vessel provides Low Temperature Liquid oxygen pump connection liquid oxygen gasifier entrance.

Further improve of the invention is:Also include heat recovery section;Heat recovery section includes sludge heater Soften water pump with low pressure, the side-entrance of sludge heater tube is connected with the inner tube outlet of sludge preheater I, and the inner tube of sludge preheater I is entered Mouth is connected with softening water heater inner tube outlet, and softening water heater inner tube import is connected with the inner tube outlet of sludge preheater II, The inner tube import of sludge preheater II is connected with steam generator side outlet, and steam generator side-entrance is connected to supercritical water Oxidation reactor is exported;Low pressure softens unit fixed on water pump suction and is connected with softening water tank outlet, low pressure softening exit of pump connection softened water Heater outer tube import, softening water heater outer tube outlet is connected with steam generator shell-side inlet, the saturated vapor of generation from Steam generator shell-side outlet is exported.

Further improve of the invention is:Also include decompression part;Decompression portion subpackage contains pressure-regulating valve, pressure regulation Valve import connection capillary pressure reducer outlet, capillary pressure reducer import is connected with sludge heater tube side outlet, pressure regulation Valve outlet and piping filter inlet communication, piping filter outlet connection catch box.

The technology for supercritical water oxidation processing of printing and dyeing sludge, including:

1) when system starts, methanol enters methanol solution storage tank with softened water, is configured to the methanol-water that concentration is 15wt% Solution, methanol aqueous solution is forced into after 28MPa by methanol delivery pump, and starting electric heater into methanol is heated to initiation temperature 500 DEG C, subsequently into the methanol solution import of overcritical water oxidization reactor;Liquid oxygen in liquid oxygen vessel is added by Low Temperature Liquid oxygen pump It is depressed into after 28MPa, flows through after liquid oxygen gasifier gasified, pass through the oxidation for entering overcritical water oxidization reactor after buffer Agent import;Clean water in catch box is forced into after 28MPa by high pressure sludge membrane pump, into the outer tube of sludge preheater I, it Flow through successively afterwards and enter overcritical water oxidization reactor after the outer tube of sludge preheater II, sludge preheater III;In overcritical water oxygen Change in reactor, ignition after the methanol solution after heating is mixed with oxidant, high-temperature product is preheated to reactor after burning, Until fluid temperature (F.T.) reaches 550 DEG C of reaction temperature in reactor, it is printing and dyeing now to switch the inlet feed of high pressure sludge membrane pump Sludge;Homogenizing emulsifying pump is opened to the electric check valve between sludge membrane pump, catch box is closed between sludge membrane pump Electric check valve;

2) when system is normally run, the fluid temperature (F.T.) in overcritical water oxidization reactor is warming up to after 550 DEG C, is carried out Material switches;Printing and dyeing sludge in sludge storage pool by screw pump, into sludge heater case side-entrance after be heated to 75 DEG C; After the outflow of sludge heater case side outlet, it is homogenized by homogenizing emulsifying pump after processing, flows into high pressure sludge barrier film pump inlet, Sludge is pressurized to the outer tube side-entrance that sludge preheater I is transported to after 28MPa, and 115 DEG C are heated to by fluid after pyroreaction Flowed out afterwards from outer tube side outlet;Enter the outer tube import of sludge preheater II afterwards, 224 DEG C are heated to by fluid after pyroreaction Flowed out afterwards from outer tube side outlet;Enter afterwards in sludge preheater III by high-temperature stream after the reaction in overcritical water oxidization reactor Body is heated to after 395 DEG C, into the sludge import of overcritical water oxidization reactor;Printing and dyeing sludge is mixed with oxidant in the reactor After conjunction, supercritical water oxidation is carried out, organic pollution is thoroughly decomposed into CO2、H2O、N2Small-molecule substance, while organic Thing oxidation reaction liberated heat heating response fluid is to 550 DEG C;

3) high temperature fluid after the reaction in overcritical water oxidization reactor, is flowed through after the heat exchange pipeline of sludge preheater III, quilt 389 DEG C are cooled to, overcritical water oxidization reactor is flowed out;Enter the pipe side-entrance of steam generator afterwards, cooled wherein Flowed out after to 288 DEG C from pipe side outlet;Into the inner tube import of sludge preheater II, it is cooled to wherein after 198 DEG C from inner tube Outlet outflow;Afterwards enter softening water heater inner tube import, release heat softened water after, be cooled to after 117 DEG C from Inner tube outlet flows out;The inner tube import of sludge preheater I is subsequently flowed into, the printing and dyeing sludge of outer tube is preheated, fluid is at it after reaction In be cooled to 81 DEG C;Enter the pipe side-entrance of sludge heater afterwards, the printing and dyeing sludge of shell-side is transferred heat to wherein, it is cold But to 30 DEG C afterwards from the outflow of pipe side outlet;

4) clean fluid after being reacted after the cooling flowed out from sludge heater tube side outlet, into capillary pressure reducer;It is high Hydraulic fluid flow realizes the 20MPa pressure loss through capillary pressure reducer, and the remaining pressure loss is undertaken by pressure-regulating valve.

Relative to prior art, the invention has the advantages that:

System start-up phase, preheats methanol solution, methanol solution enters supercritical water oxidation after preheating by electric heater Reactor and oxidant mixing after-combustion heat release, for the organic materials in pre- thermal reactor.System start-up phase is added using electricity Methanol solution after heat preheating is as thermal source, and preheating device is simple, effectively prevent gas furnace as the knot in pipeline during thermal source Burnt carbon distribution problem;In addition, methanol solution burnt in reactor after high-temperature product directly mixed with organic materials it is carried out it is pre- Heat, is the diabatic process of no wall, is the direct heat transfer between molecule, and heat transfer efficiency is high.Thus improve system operation reliable Property, and reduce equipment investment.

In sludge pretreatment part, in sludge heater by reaction after fluid sludge is preheated to 75 DEG C, effectively drop Low sewage sludge viscosity, and then sludge flowable is improved, reduction sludge poor fluidity is to high pressure sludge membrane pump proposed requirement.

The soluble inorganic salt for preventing insoluble particles of inorganic material and supercritical water from separating out by controlling rate of flow of fluid Deposition of the grain in conveying pipe and system equipment, it is to avoid solid particle blocks pipeline;Capillary pressure reducer is flowed through by fluid To realize that system is depressured, abrasion or blocking of the solid particle to decompression valve under big pressure reduction conditions are overcome, system is improved Operational reliability.

Preheating material and the oxidation heat liberation that mud organic substance is reclaimed by way of producing saturated vapor, system is realized certainly Heat.Cascaded utilization of energy is carried out, realizes that capacity usage ratio is maximized, lifting system economy.

【Brief description of the drawings】

Fig. 1 is the system structure diagram of the present invention.

Label is represented respectively in figure:1. sludge storage pool;2. screw pump;3. sludge heater;4. homogenizing emulsifying pump;5. sludge Membrane pump;6. sludge preheater I;7. sludge preheater II;8. sludge preheater III;9. overcritical water oxidization reactor;10. first Alcoholic solution storage tank;11. methanol delivery pump;12. methanol starts electric heater;13. liquid oxygen vessel;14. Low Temperature Liquid oxygen pump;15. liquid Gasification device;16. buffer;17. softening water tank;18. soften water pump;19. soften water heater;20. steam generator;21. Capillary pressure reducer;22. pressure-regulating valve;23. piping filter;24. catch box.

【Embodiment】

As shown in figure 1, a kind of supercritical water oxidation treatment system of printing and dyeing sludge of the invention, including sludge pretreatment portion Point, material regenerator section, hybrid reaction part, heat recovery section and decompression part, the connected mode of devices in system is as follows:

Sludge pretreatment part includes sludge storage pool 1, outlet and the inlet communication of screw pump 2, screw pump 2 of sludge storage pool 1 Outlet is connected with the shell-side inlet of sludge heater 3, the connection import of homogenizing emulsifying pump 4 of the shell-side outlet of sludge heater 3, emulsifying Pump 4 is exported and the inlet communication of high pressure sludge membrane pump 5.

Material regenerator section starts electric heater 12 and sludge preheater III 8 comprising methanol, and methanol starts electric heater 12 Import is connected with the outlet of high-pressure methanol delivery pump 11, and the import of high-pressure methanol delivery pump 11 connection methanol solution storage tank 10 is exported.It is dirty The entrance of mud preheater III 8 is connected with the outlet of the outer tube of sludge preheater II 7, and the outer tube import of sludge preheater II 7 is preheated with sludge The outlet of the outer tube of device I 6 is connected.The outer tube import of sludge preheater I 6 and the outlet of high pressure sludge membrane pump 5.

Hybrid reaction part includes overcritical water oxidization reactor 9, and the oxygen intake of overcritical water oxidization reactor 9 is with delaying Rush the outlet of device 16 to be connected, the import of buffer 16 connection liquid oxygen gasifier 15 is exported, the methanol solution of overcritical water oxidization reactor 9 Import is connected to the outlet that methanol starts electric heater 12, sludge import and the sludge preheater of overcritical water oxidization reactor 9 III 8 outlet.Liquid oxygen vessel 13 provides Low Temperature Liquid oxygen pump 14 and connects the entrance of liquid oxygen gasifier 15.

Heat recovery section includes sludge heater 3 and low pressure softening water pump 18, the pipe side-entrance of sludge heater 3 and sludge The inner tube outlet of preheater I 6 is connected, and the inner tube import of sludge preheater I 6 is connected with the softening inner tube outlet of water heater 19, softened water The inner tube import of heater 19 is connected with the inner tube outlet of sludge preheater II 7, the inner tube import of sludge preheater II 7 and steam generator 20 pipe side outlets are connected, and the pipe side-entrance of steam generator 20 is connected to overcritical water oxidization reactor 9 and exported.Low pressure softens water pump 18 imports are connected with the outlet of softening water tank 17, the low pressure softening water pump 18 outlet connection softening outer tube import of water heater 19, softening The outlet of the outer tube of water heater 19 is connected with the shell-side inlet of steam generator 20, and the saturated vapor of generation is from the shell-side of steam generator 20 Outlet output.

Decompression portion subpackage contains pressure-regulating valve 22, and the import of pressure-regulating valve 22 is connected to capillary pressure reducer 21 and exported, hair The import of tubule reducing transformer 21 is connected with the pipe side outlet of sludge heater 3, the outlet of pressure-regulating valve 22 and the import of piping filter 23 Connection, the outlet of piping filter 23 is connected to catch box 24.It is depressured in part, fluid flows through capillary pressure reducer 21 after reaction The decompression of high-pressure fluid is realized, the outlet of capillary pressure reducer 21 sets pressure-regulating valve 22, realizes the accurate control of system pressure.

Refer to shown in Fig. 1, a kind of technology for supercritical water oxidation processing of printing and dyeing sludge of the invention includes:

1) when system starts, methanol enters methanol solution storage tank 10 with softened water, is configured to the methanol that concentration is 15wt% The aqueous solution, methanol aqueous solution is forced into after 28MPa by methanol delivery pump 11, and starting electric heater 12 into methanol has been heated to 500 DEG C of temperature is fired, subsequently into the methanol solution import of overcritical water oxidization reactor 9.Liquid oxygen in liquid oxygen vessel 13 is by low Warm liquid oxygen pump 14 is forced into after 28MPa, is flowed through after liquid oxygen gasifier 15 gasified, by buffer 16 to eliminate Low Temperature Liquid oxygen pump Caused oxidant stress and flowed fluctuation, afterwards into the oxidant inlet of overcritical water oxidization reactor 9.In catch box 24 Clean water be forced into by high pressure sludge membrane pump 5 after 28MPa, into the outer tube of sludge preheater I 6, flow through dirt successively afterwards Enter overcritical water oxidization reactor 9 after the outer tube of mud preheater II 7, sludge preheater III 8.In overcritical water oxidization reactor 9 In, ignition after the methanol solution after heating is mixed with oxidant, high-temperature product is preheated to reactor after burning, until reaction Fluid temperature (F.T.) reaches 550 DEG C of reaction temperature in device, and the inlet feed for now switching high pressure sludge membrane pump 5 is printing and dyeing sludge.Beat Homogenizing emulsifying pump 4 is opened to the electric check valve between sludge membrane pump 5, catch box 24 is closed to the electricity between sludge membrane pump 5 Dynamic stop valve.

2) when system is normally run, the fluid temperature (F.T.) in overcritical water oxidization reactor 9 is warming up to after 550 DEG C, is entered Row material switches.Printing and dyeing sludge in sludge storage pool 1 by screw pump 2, into the shell-side inlet of sludge heater 3 after be heated to 75 DEG C, the viscosity of printing and dyeing sludge is reduced, and then increases its mobility.After the outflow of the shell-side outlet of sludge heater 3, by homogenized milk Change pump 4 to be homogenized after processing, flow into the import of high pressure sludge membrane pump 5, sludge, which is pressurized to after 28MPa, is transported to sludge preheating The outer tube side-entrance of device I 6, is heated to after 115 DEG C flowing out from outer tube side outlet by fluid after pyroreaction.Enter sludge afterwards pre- The outer tube import of hot device II 7, is heated to after 224 DEG C flowing out from outer tube side outlet by fluid after pyroreaction.Enter sludge afterwards It is heated in preheater III 8 by high temperature fluid after the reaction in overcritical water oxidization reactor 9 after 395 DEG C, into supercritical water The sludge import of oxidation reactor 9.After printing and dyeing sludge is mixed in reactor 9 with oxidant, supercritical water oxidation is carried out, Organic pollution is thoroughly decomposed into CO2、H2O、N2Deng small-molecule substance, while oxidation operation reaction liberated heat heating Reacting fluid is to 550 DEG C.

3) high temperature fluid after the reaction in overcritical water oxidization reactor 9, is flowed through after the heat exchange pipeline of sludge preheater III 8, 389 DEG C are cooled to, overcritical water oxidization reactor is flowed out.Afterwards enter steam generator 20 pipe side-entrance, wherein by It is cooled to after 288 DEG C from the outflow of pipe side outlet.Into the inner tube import of sludge preheater II 7, be cooled to wherein after 198 DEG C from Inner tube outlet flows out.Enter the softening inner tube import of water heater 19 afterwards, release after heat softened water, be cooled to 117 Flowed out after DEG C from inner tube outlet.The inner tube import of sludge preheater I 6 is subsequently flowed into, the printing and dyeing sludge of outer tube is preheated, flowed after reaction Body is cooled to 81 DEG C wherein.Enter the pipe side-entrance of sludge heater 3 afterwards, the printing and dyeing that shell-side is transferred heat to wherein are dirty Mud, from the outflow of pipe side outlet after being cooled to 30 DEG C.

4) clean fluid after being reacted after the cooling flowed out from the pipe side outlet of sludge heater 3, into capillary pressure reducer 21. High-pressure fluid, which flows through capillary pressure reducer 21, can realize the 20MPa pressure loss, and the remaining pressure loss (being less than 5MPa) is by pressing Force regulating valve 22 undertakes.The mode of capillary pressure reducer combination pressure regulating valve classification decompression, can not only prevent pressure from adjusting Rate of flow of fluid in valve 22 is too high and valve wear problem, while the accurate control of system pressure can be realized by regulating valve 22 System, capillary changes also very cheap when needed in addition.

Claims (1)

1. the technology for supercritical water oxidation processing of printing and dyeing sludge, it is characterised in that at the supercritical water oxidation based on printing and dyeing sludge Reason system;The supercritical water oxidation treatment system of the printing and dyeing sludge, including:It is sludge pretreatment part, material regenerator section, mixed Close reactive moieties;
Sludge pretreatment part includes sludge storage pool (1), outlet and screw pump (2) inlet communication, screw pump of sludge storage pool (1) (2) outlet is connected with sludge heater (3) shell-side inlet, and sludge heater (3) shell-side outlet connection homogenizing emulsifying pump (4) enters Mouthful, homogenizing emulsifying pump (4) outlet and high pressure sludge membrane pump (5) inlet communication;
Material regenerator section starts electric heater (12) and sludge preheater III (8) comprising methanol, and methanol starts electric heater (12) import is connected with high-pressure methanol delivery pump (11) outlet, high-pressure methanol delivery pump (11) import connection methanol solution storage tank (10) export;The entrance of sludge preheater III (8) is connected with the outlet of sludge preheater II (7) outer tube, and sludge preheater II (7) is outside Pipe import is connected with the outlet of sludge preheater I (6) outer tube;Sludge preheater I (6) outer tube import and high pressure sludge membrane pump (5) Outlet;
Hybrid reaction part includes overcritical water oxidization reactor (9), and the oxygen intake of overcritical water oxidization reactor (9) is with delaying Rush device (16) outlet to be connected, buffer (16) import connection liquid oxygen gasifier (15) outlet, overcritical water oxidization reactor (9) Methanol solution import is connected to the outlet that methanol starts electric heater (12), the sludge import of overcritical water oxidization reactor (9) With the outlet of sludge preheater III (8);Liquid oxygen vessel (13) provides Low Temperature Liquid oxygen pump (14) connection liquid oxygen gasifier (15) Entrance;
The supercritical water oxidation treatment system of printing and dyeing sludge also includes heat recovery section;Heat recovery section is heated comprising sludge Device (3) and low pressure softening water pump (18), sludge heater (3) pipe side-entrance are connected with sludge preheater I (6) inner tube outlet, dirty Mud preheater I (6) inner tube import with softening water heater (19) inner tube outlet be connected, softening water heater (19) inner tube import and Sludge preheater II (7) inner tube outlet is connected, and sludge preheater II (7) inner tube import connects with steam generator (20) pipe side outlet Logical, steam generator (20) pipe side-entrance is connected to overcritical water oxidization reactor (9) outlet;Low pressure softens water pump (18) import It is connected with softening water tank (17) outlet, low pressure softening water pump (18) outlet connection softening water heater (19) outer tube import, softening The outlet of water heater (19) outer tube is connected with steam generator (20) shell-side inlet, and the saturated vapor of generation is from steam generator (20) shell-side outlet is exported;
The supercritical water oxidation treatment system of printing and dyeing sludge also includes decompression part;Decompression portion subpackage (22) containing pressure-regulating valve, Pressure-regulating valve (22) import connection capillary pressure reducer (21) outlet, capillary pressure reducer (21) import and sludge heater (3) pipe side outlet is connected, pressure-regulating valve (22) outlet and piping filter (23) inlet communication, piping filter (23) outlet Connect catch box (24);
The technology for supercritical water oxidation processing of the printing and dyeing sludge, including:
1) when system starts, methanol enters methanol solution storage tank (10) with softened water, is configured to the methanol-water that concentration is 15wt% Solution, methanol aqueous solution is forced into after 28MPa by methanol delivery pump (11), and starting electric heater (12) into methanol is heated to 500 DEG C of initiation temperature, subsequently into the methanol solution import of overcritical water oxidization reactor (9);Liquid in liquid oxygen vessel (13) Oxygen is forced into after 28MPa by Low Temperature Liquid oxygen pump (14), is flowed through after liquid oxygen gasifier (15) gasified, after buffer (16) Into the oxidant inlet of overcritical water oxidization reactor (9);Clean water in catch box (24) passes through high pressure sludge membrane pump (5) it is forced into after 28MPa, into sludge preheater I (6) outer tube, flows through sludge preheater II (7) outer tube, sludge successively afterwards Preheater III (8) enters overcritical water oxidization reactor (9) afterwards;In overcritical water oxidization reactor (9), the methanol after heating High-temperature product is preheated to reactor after ignition after solution is mixed with oxidant, burning, until fluid temperature (F.T.) reaches in reactor To 550 DEG C of reaction temperature, the inlet feed for now switching high pressure sludge membrane pump (5) is printing and dyeing sludge;Open homogenizing emulsifying pump (4) to the electric check valve between sludge membrane pump (5), catch box (24) is closed to electronic section between sludge membrane pump (5) Only valve;
2) when system is normally run, the fluid temperature (F.T.) in overcritical water oxidization reactor (9) is warming up to after 550 DEG C, is carried out Material switches;Printing and dyeing sludge in sludge storage pool (1) by screw pump (2), into sludge heater (3) shell-side inlet after added Heat is to 75 DEG C;After the outflow of sludge heater (3) shell-side outlet, it is homogenized by homogenizing emulsifying pump (4) after processing, flows into high pressure Sludge membrane pump (5) import, sludge is pressurized to the outer tube side-entrance that sludge preheater I (6) is transported to after 28MPa, by high temperature Fluid is heated to after 115 DEG C flowing out from outer tube side outlet after reaction;Enter the outer tube import of sludge preheater II (7), quilt afterwards Fluid is heated to after 224 DEG C flowing out from outer tube side outlet after pyroreaction;Enter afterwards overcritical in sludge preheater III (8) High temperature fluid is heated to after 395 DEG C after reaction in water oxidation reactor (9), into the dirt of overcritical water oxidization reactor (9) Mud import;After printing and dyeing sludge is mixed in reactor (9) with oxidant, supercritical water oxidation, organic pollution quilt are carried out Thoroughly it is decomposed into CO2、H2O、N2Small-molecule substance, while oxidation operation reacts liberated heat heating response fluid to 550 ℃;
3) high temperature fluid after the reaction in overcritical water oxidization reactor (9), is flowed through after sludge preheater III (8) heat exchange pipeline, 389 DEG C are cooled to, overcritical water oxidization reactor is flowed out;Enter the pipe side-entrance of steam generator (20) afterwards, wherein It is cooled to after 288 DEG C from the outflow of pipe side outlet;Into sludge preheater II (7) inner tube import, 198 DEG C are cooled to wherein Flowed out afterwards from inner tube outlet;Enter softening water heater (19) inner tube import afterwards, release after heat softened water, be cooled Flowed out after to 117 DEG C from inner tube outlet;The inner tube import of sludge preheater I (6) is subsequently flowed into, the printing and dyeing sludge of outer tube is preheated, Fluid is cooled to 81 DEG C wherein after reaction;Enter the pipe side-entrance of sludge heater (3) afterwards, shell is transferred heat to wherein The printing and dyeing sludge of side, from the outflow of pipe side outlet after being cooled to 30 DEG C;
4) clean fluid after being reacted after the cooling flowed out from sludge heater (3) pipe side outlet, into capillary pressure reducer (21); High-pressure fluid flows through the pressure loss that capillary pressure reducer (21) realizes 20MPa, and the remaining pressure loss is by pressure-regulating valve (22) undertake.
CN201510654532.1A 2015-10-10 2015-10-10 The supercritical water oxidation treatment system and technique of printing and dyeing sludge CN105254146B (en)

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CN205644203U (en) * 2016-02-03 2016-10-12 总装备部工程设计研究总院 A safety monitoring system for supercritical water oxidation device
CN105600913B (en) * 2016-03-10 2018-07-17 西安交通大学 A kind of dropping equipment and method of supercritical water system
CN105630019B (en) * 2016-03-10 2018-10-30 西安交通大学 A kind of control system and method for the decompression of supercritical water system
CN105906028B (en) * 2016-06-29 2018-09-18 广西大学 A kind of etch-proof Supercritical water oxidation treatment device of anti-clogging
CN106630287B (en) * 2016-12-30 2019-06-18 西安理工大学 The overcritical hydro-thermal burning processing of oil recovery waste liquid, steam injection system
CN108826744A (en) * 2018-06-12 2018-11-16 西安交通大学 The system for carrying out cool and thermal power multiple-supplying with supercritical water oxidation system complementary energy
CN108840537A (en) * 2018-07-10 2018-11-20 西安交通大学 A kind of the sludge allotment transportation system and method for supercritical water oxidation treatment system
CN109305722B (en) * 2018-10-26 2020-10-27 西安交通大学 Supercritical water oxidation system for graded oxygen injection and wastewater and/or sludge treatment method based on system
CN110822749B (en) * 2019-10-12 2020-10-27 西安交通大学 Waste heat utilization system of supercritical water oxidation device and working method thereof

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CN103073103B (en) * 2012-12-28 2014-07-16 新奥科技发展有限公司 Method for treating carbon-containing organic matter by supercritical water oxidation
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