CN205442756U - Indirect heat exchange type supercritical water oxidation system of organic waste liquid and mud - Google Patents

Indirect heat exchange type supercritical water oxidation system of organic waste liquid and mud Download PDF

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Publication number
CN205442756U
CN205442756U CN201620184312.7U CN201620184312U CN205442756U CN 205442756 U CN205442756 U CN 205442756U CN 201620184312 U CN201620184312 U CN 201620184312U CN 205442756 U CN205442756 U CN 205442756U
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China
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outlet
supercritical water
water oxidation
tube
mud
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CN201620184312.7U
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Chinese (zh)
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王树众
李艳辉
任萌萌
唐兴颖
张洁
王玉珍
杨健乔
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西安交通大学
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Abstract

The utility model discloses an indirect heat exchange type supercritical water oxidation system of organic waste liquid and mud through setting up regenerator, pre -heater, with the help of middle media?rotation, realizes indirectly giving the follow -up treatment material of treating with the heat transfer that supercritical water oxidization reaction goes out water. Directly treating treatment material and carrying out the indirect heating equipment that preheats for reflecting water, pre -heater / regenerator in this technology only its inner tube need adopt high -end anticorrosive alloy, outer tube adoption carbon steel or the low alloy steel can to greatly reduced preheat in the supercritical water oxidation technology cooling arrangement's investment cost. In addition, pre -heater / regenerator outer tube side is clean demineralized water, has avoided the heat exchanger outer tube to incline away dirty fluidic and has blockked up the risk. In addition, the terminal three -phase separation subsystem that sets up of technology can realize that supercritical water oxidization reaction goes out aquatic liquid, solid, the triphase automation of gas online separation in succession. But this technology wide application in the supercritical water oxidation treatment field of all kinds of organic waste liquids and mud.

Description

The indirect heat exchange type supercritical water oxidation system of organic liquid waste and mud

[technical field]

This utility model belongs to supercritical water treatment debirs field, is specifically related to the indirect heat exchange type supercritical water oxidation system of a kind of organic liquid waste and mud.

[background technology]

Supercritical water (SupercriticalWater is called for short SCW) refers to that temperature and pressure is above the water of the special state of its critical point (Tc=374.15 DEG C, Pc=22.12MPa).Supercritical water oxidation (SupercriticalWaterOxidation, SCWO) is that the physicochemical property utilizing supercritical water unique is degraded to the efficient oxidation realizing poisonous and harmful organic pollution.Compared with common aqueous water, the various physicochemical properties of supercritical water there occurs significant change: density, viscosity, ionic product are all decreased obviously, and diffusion coefficient is higher;Hydrogen bond between hydrone weakens;Dielectric constant becomes minimum, under 25MPa by about 80 under room temperature drop to temperature more than or equal to 400 DEG C time less than 2, this value is roughly equivalent to the dielectric constant of common organic solvents under standard state.Therefore, in supercritical water system, oxygen, air, hydrogen peroxide, water and most Organic substance can dissolve each other with arbitrary proportion, gas liquid film disappears, supercritical water oxidation system becomes homogeneous reaction system, eliminates alternate mass-and heat-transfer resistance, thus accelerates response speed, Organic substance exhaustive oxidation can be degraded to CO2, H2O, N2 and some other organic micromolecule compound in several seconds to a few minutes, the clearance of most of debirs is up to 99.9%.Additionally, the dissolubility that inorganic salts is in SCW is extremely low, being easily separated out, the liquid after process is clean water;When Organic substance mass concentration is more than 2% in organic wastewater, exothermic heat of reaction can be relied on to maintain system thermal balance, it is not necessary to extraneous additional heat;Equipment volume is little, safety good, meet closure requirement.Supercritical Water Oxidation Technology shows great technical advantage in terms of processing difficult degradation, toxic organics.

Supercritical water oxidation is high-temperature high-voltage reaction, thus the cooling of the preheating for the treatment of material, reaction water outlet is requisite link in supercritical water oxidation technique.For conventional supercritical fluid water oxidation technology, generally by heat exchanger, supercritical water oxidation water outlet is lowered the temperature by treating material as cooling medium, realizes the pre-heating temperature elevation for the treatment of material simultaneously.Treating material after pre-heating temperature elevation subsequently enters reactor, it is achieved the continuous operation of supercritical water oxidation system.Near The Critical Point high density pool due to 320~410 DEG C of scopes, the dielectric constant of water and the dissolubility of inorganic salt are the biggest, this temperature section is corrosion-susceptible district, for in conventional supercritical fluid water oxidation technology, the process section that equipment corrosion is the most serious, and this process section is exactly corresponding to the cold and hot fluid side of above-mentioned heat exchanger, the lasting reliability service of this heat exchanger is constituted potential threat.

In addition, the treating materials such as all kinds of organic liquid wastes and mud often contain substantial amounts of severe corrosive component such as chlorine root etc., when in organic pollution in treating material possibly together with hetero atoms such as halogen, sulfur or phosphorus, also can produce corresponding mineral acid in supercritical water oxidation process.In addition, in order to ensure the oxidative degradation effect of organic pollution, the supply of oxidant excess often, sometimes coefficient of oxidation (quantity delivered of oxidant and the debirs oxidation ratio to the consumption of oxidant) even may be up to more than 3, often contains the remaining oxidizing agent of high level in supercritical water oxidation water outlet.Therefore, the corrosivity of supercritical water oxidation water outlet is usually even more than treating material.For above-mentioned heat exchanger, its cooling medium is treating material, and hot fluid is supercritical water oxidation water outlet.During according to the double pipe heat exchanger that voltage endurance capability is strong, then the inside and outside wall of inner tube, the internal face of outer tube are all faced with serious corrosion and threaten.The inner and outer pipes of heat transmission equipment all must use high-end corrosion resistant alloy, and its manufacturing cost is higher.In addition relative to inner tube flow process, the local stoppages probability of outer tube flow process is relatively big, when fluid is inorganic salt or the higher supercritical water fluid of insoluble solid content in outer tube flow process, easily causes the blocking accident of outer tube flow process.

Therefore, for all kinds of organic liquid wastes and the exploitation of mud supercritical water oxidation technique, need to reduce the equipment investment of preheating-cooling stage and operation risk thereof, to guarantee the Low investment of supercritical water oxidation apparatus and lasting operational reliability.

Municipal sludge and all types of industries sludge yield are huge, it is that the emphasis of supercritical water oxidation technique processes one of object, therefore the treating material of supercritical water oxidation system often contains a certain amount of insoluble solid, therefore the most online three-phase (liquid phase, gas-phase product, insoluble solid) avoiding insoluble solid deposition in supercritical water oxidation apparatus to block, realize supercritical water oxidation water outlet separates, the most significant for improving the market competitiveness of supercritical water oxidation technique.

[utility model content]

The purpose of this utility model is the problem high with the investment reflecting water direct heat-exchange equipment for treating material in background technology, corrosion/blocking risk is big, and the urgency of water outlet continuous-stable three phase separation is reacted in the blocking of insoluble solid deposition and realization in avoiding device, it is provided that the indirect heat exchange type supercritical water oxidation system of a kind of organic liquid waste and mud.

For reaching above-mentioned purpose, this utility model is achieved by the following technical solutions:

The indirect heat exchange type supercritical water oxidation system of a kind of organic liquid waste and mud, including supercritical water oxidation system system, material pretreatment system, oxygen supply system and intermediate medium heat-conducting system;Reaction mass is entered supercritical water oxidation system system by material pretreatment system, and intermediate medium heat-conducting system carries out heat exchange;Supercritical water oxidation system system includes reactor and is arranged at the three phase separation subsystem of end, and the material reacted is arranged outside three phase separation subsystem;Oxygen supply system is for providing oxygen in reactor.

This utility model is further improved by:

Described material pretreatment system includes that material buffer tank, the entrance that the outlet of material buffer tank is united with supercritical water oxidation system are connected;The entrance of material buffer tank connects insoluble matter filter and explosive box respectively;The entrance of insoluble matter filter connects material input channel, and the pipeline between outlet and material buffer tank arranges grinding pump;On pipeline between explosive box and material buffer tank, dosing pump is set.

Described oxygen supply system includes that liquid oxygen tank, the outlet of liquid oxygen tank are sequentially connected with liquid oxygen pump, liquid oxygen gasifier, oxygen surge tank and oxygen pressure regulator, and the outlet of oxygen pressure regulator is connected with the entrance of reactor.

Described supercritical water oxidation system system includes product pump, the entrance of product pump is connected with the outlet of material pretreatment system, material delivery side of pump connects preheater inner tube, the inner tube outlet of preheater is connected with the entrance of reactor, the outlet of reactor connects regenerator inner tube, the inner tube outlet of regenerator is connected by the entrance of reducing transformer with three phase separation subsystem, and the outlet of three phase separation subsystem discharge pipe outer with system water outlet is connected.

Described intermediate medium heat-conducting system includes blower pump for pipeline, and the entrance of blower pump for pipeline exports with the outer tube of preheater and is connected, and outlet is connected with the outer tube inlet of regenerator;The outer tube outlet of regenerator is connected with the outer tube inlet of preheater by heater.

It is additionally provided with pressure regulator on pipeline between described blower pump for pipeline and preheater.

Also including sweet-water tank, the outlet of sweet-water tank is divided into two-way, and a road is connected on the pipeline between preheater and blower pump for pipeline, and another road is connected to the porch of product pump.

The outlet of described reducing transformer is sequentially connected with gas-liquid separator and online micro-filter, and the outlet of online micro-filter discharge pipe outer with system water outlet is connected.

The outlet of described reducing transformer is sequentially connected with online micro-filter and gas-liquid separator, and the outlet of gas-liquid separator discharge pipe outer with system water outlet is connected;

The outlet of described reducing transformer connects three phase separator, and the liquid outlet of three phase separator discharge pipe outer with system water outlet is connected.

Compared with prior art, this utility model has the advantages that

This utility model is by arranging intermediate medium heat-conducting system, it is achieved indirectly the heat of supercritical water oxidation water outlet is passed to follow-up treating material.The heat transmission equipment directly treating material preheated relative to reaction water outlet, this utility model preheater and regenerator only its inner tube need to use high-end corrosion resistant alloy, outer tube to use carbon steel or low-alloy steel, thus greatly reduces the cost of investment of preheating-cooling device in supercritical water oxidation technique.

Further, this utility model insoluble matter filter and grinding pump, can be by the size controlling of insoluble solid granule in supercritical water oxidation apparatus inlet feed to less than 50 microns, less insoluble solid particle size, substantially reduce it to deposit in supercritical water oxidation apparatus, the probability of occluding device, improves the operational reliability of device.

Further, the inner tube of this utility model preheater and regenerator sidles corrosive fluid (preheater inner tube be treating material, regenerator inner tube be supercritical water oxidation water outlet), outer tube side is clean demineralized water, therefore preheater and regenerator only its inner tube need to use high-end corrosion resistant alloy, outer tube to use carbon steel or low-alloy steel, thus greatly reduce the cost of investment of preheating-cooling device in supercritical water oxidation technique.Additionally, outer tube side is clean demineralized water, it is to avoid outer tube sidles the blocking risk of dirty fluid (treating material or reaction water outlet).

Further, during this utility model three phase separation subsystem can realize supercritical water oxidation water outlet, the liquid such as liquid phase, insoluble solid microparticulate and gas-phase product, continuous automatic on-line solid, gas three-phase separate.

[accompanying drawing explanation]

Fig. 1 is overall structure schematic diagram of the present utility model.

Wherein, 1-insoluble matter filter;2-grinding pump;3-material buffer tank;4-product pump;5-preheater;6-sweet-water tank;7-reactor;8-regenerator;9-reducing transformer;10-gas-liquid separator;The online micro-filter of 11-;12-three phase separator;13-blower pump for pipeline;14-heater;15-liquid oxygen tank;16-liquid oxygen pump;17-liquid oxygen gasifier;18-oxygen surge tank;19-oxygen pressure regulator;20-explosive box;21-dosing pump;22-pressure regulator;101-switch valve;102-switch valve;103-switch valve.

[detailed description of the invention]

Below in conjunction with the accompanying drawings this utility model is described in further detail:

Seeing Fig. 1, this utility model includes that material pretreatment system, intermediate medium heat-conducting system, oxygen supply system, supercritical water oxidation system are united.Wherein:

Material pretreatment system includes insoluble matter filter 1, grinding pump 2, material buffer tank 3, explosive box 20 and dosing pump 21, and grinding pump 2 can grind insoluble solid particle diameter to less than 50 microns.Insoluble matter filter 1 entrance connects material input channel, and insoluble matter filter 1 outlet connects grinding pump 2 entrance, and grinding pump 2 outlet connects material surge tank 3 entrance, and the outlet of explosive box 20 connects dosing pump 21, and the outlet of dosing pump 21 connects material surge tank 3 entrance.

Intermediate medium heat-conducting system includes preheater 5, blower pump for pipeline 13, regenerator 8 and heater 14, the outer tube inlet of preheater 5 connects heater 14 and exports, preheater 5 outer tube outlet connecting pipe road booster pump 13, blower pump for pipeline 13 outlet is connected to regenerator 8 outer tube, and the outlet of regenerator 8 outer tube connects heater 14 entrance.

Oxygen supply system includes liquid oxygen tank 15, liquid oxygen pump 16, liquid oxygen gasifier 17, oxygen surge tank 18 and oxygen pressure regulator 19.Liquid oxygen tank 15 connects liquid oxygen pump 16, and liquid oxygen pump 16 is connected to liquid oxygen gasifier 17, and liquid oxygen gasifier 17 outlet connects oxygen surge tank 18, and oxygen surge tank 18 outlet connects oxygen pressure regulator 19, and oxygen pressure regulator 19 outlet is connected to reactor 7 entrance.

Supercritical water oxidation system system includes product pump 4, preheater 5, reactor 7, regenerator 8, reducing transformer 9 and three phase separation subsystem, product pump 4 entrance connects material surge tank 3 and exports, product pump 4 outlet is connected to preheater 5 inner tube inlet, preheater 5 inner tube outlet is connected to reactor 7 entrance, reactor 7 outlet is connected to regenerator 8 inner tube, regenerator 8 inner tube outlet connects reducing transformer 9, and reducing transformer 9 outlet is connected to three phase separation subsystem, the outlet of three phase separation subsystem is connected to the outer discharge pipe of system water outlet.

Three phase separation subsystem includes that gas-liquid separator 10, online micro-filter 11 or gas-liquid-solid three-phase separator 12, described gas-liquid separator 10 connect that reducing transformer 9 exports, gas-liquid separator 10 outlet is connected to online micro-filter 11, online micro-filter 11 exports the outer discharge pipe of connection system water outlet;Or online micro-filter 11 entrance connects, and reducing transformer 9 exports, online micro-filter 11 outlet connects gas-liquid separator 10 entrance, gas-liquid separator 10 exports the outer discharge pipe of connection system water outlet;Or gas-liquid-solid three-phase separator 12 entrance connects reducing transformer 9 and exports, gas-liquid-solid three-phase separator 12 outlet is connected to the outer discharge pipe of system water outlet.

Principle of the present utility model and process:

System start-up early stage, is first out-of-bounds supplemented demineralized water to sweet-water tank 6 by technique.From demineralized water one branch road of sweet-water tank 6, through switch valve 103 to blower pump for pipeline 13.Blower pump for pipeline is positioned at the minimum point in intermediate medium loop, and under the pump action of blower pump for pipeline 13, intermediate medium flows through regenerator 8 outer tube, heater 14, preheater 5 outer tube, pressure regulator 22 successively, carries out the water-filling in intermediate medium loop;Water-filling complete after by turning the aperture of the pressure regulator 22 being positioned at intermediate medium loop peak down, it is achieved the boosting in intermediate medium loop, water-filling has boosted rear closing switch valve 103.Meanwhile, from another branch road of sweet-water tank 6, through switch valve 102 to product pump 4.Under the pump action of product pump 4, demineralized water flows through preheater 5 inner tube, reactor 7, regenerator 8 inner tube, reducing transformer 9, three phase separation subsystem successively, eventually enters into the outer discharge pipe of system water outlet.Progressively regulation reducing transformer 9, makes pressure at reactor 7 gradually rise to supercritical pressure.Starting heater 14 and intermediate medium carries out concurrent heating, blower pump for pipeline 13 is as intermediate medium circulation power, through the circulating-heating of certain time, reactor inlet temperature can be made to be increased to desired value, i.e. complete the intensification of system.

After system boosting intensification completes, product pump 4 inlet feed is switched to the treating material from material buffer tank 3 by the demineralized water from sweet-water tank 6.Through filtration, the milled processed of grinding pump 2 of insoluble matter filter 1, in material buffer tank 3, the size tunable system of insoluble solid granule is below 50 microns;Additionally, from the medicament of explosive box 20, enter material buffer tank 3 through dosing pump 21, in material buffer tank under agitator effect, the homogenizing allotment of material characteristic can be realized, meet the supercritical water oxidation apparatus requirement to system feeding.Deployed treating material is preheated high temperature intermediate medium in device 5 outer tube in product pump 4 flows into preheater 5 inner tube and is preheated to target preheating temperature, subsequently into reactor 7;Liquid oxygen from liquid oxygen tank 15 flows through liquid oxygen pump 16, liquid oxygen gasifier 17 successively, then enters oxygen surge tank 18 with oxygen form, enters reactor 7 after oxygen pressure regulator 19 pressure regulation.In reactor 7, reach to preheat treating material and the oxygen of temperature and meet generation oxidation reaction, release certain heat.Supercritical water oxidation water outlet enters regenerator 8 inner tube and transfers heat to the intermediate medium of regenerator 8 outer tube.Under the effect of blower pump for pipeline 13, intermediate medium is at intermediate medium loop internal circulation flow, the heat of inner tube reaction water outlet is absorbed in regenerator 8 outer tube, heater via 14 needs suitable concurrent heating if desired, flow into preheater 5 outer tube and transfer heat to material in preheater 5 inner tube, it is achieved the preheating for the treatment of material.From regenerator 8 inner tube cooling react water outlet after reducing transformer 9 is down to suitable pressure, enter three phase separator subsystem, it is achieved reaction water outlet three phase separation.

The implementing procedure of three phase separation subsystem can be divided into three kinds, sees Fig. 1.One, first separates gas phase, then realizes solid-liquor separation: from the low-temp reaction water outlet of reducing transformer 9, initially entering gas-liquid separator 10, gas-phase product and residual oxygen etc. are discharged from its top, and liquid-solid mixture is entered online micro-filter 11 by its outlet at bottom;Realizing solid-liquor separation in online micro-filter 11, solid phase residue by its sewage draining exit, continuously or discharge by interval, and liquid phase is flowed out by its leakage fluid dram, subsequently into the outer discharge pipe of system water outlet.Its two, first abjection solid phase residue, after realize gas-liquid separation: from the low-temp reaction water outlet of reducing transformer 9, initially entering online micro-filter 11, solid phase residue by its bottom blow-down mouth, continuously or discharge by interval;Gas-liquid mixture enters gas-liquid separator 10, and gas-phase product and residual oxygen etc. are discharged from its top, and liquid phase is flowed out by its leakage fluid dram, subsequently into the outer discharge pipe of system water outlet.They are three years old, realize three phase separation: the low-temp reaction water outlet from reducing transformer 9 enters gas-liquid-solid three-phase separator 12 simultaneously, phase product and residual oxygen etc. are discharged from its top, solid phase residue by its bottom blow-down mouth, continuously or discharge by interval, liquid phase is flowed out by its leakage fluid dram, subsequently into the outer discharge pipe of system water outlet.

Above content only illustrates technological thought of the present utility model; protection domain of the present utility model can not be limited with this; every according to the technological thought that the utility model proposes, any change done on the basis of technical scheme, within each falling within the protection domain of this utility model claims.

Claims (10)

1. the indirect heat exchange type supercritical water oxidation system of organic liquid waste and mud, it is characterised in that include supercritical water oxidation system system, material pretreatment system, oxygen supply system and intermediate medium heat-conducting system;Reaction mass is entered supercritical water oxidation system system by material pretreatment system, and intermediate medium heat-conducting system carries out heat exchange;Supercritical water oxidation system system includes reactor (7) and is arranged at the three phase separation subsystem of end, and the material reacted is arranged outside three phase separation subsystem;Oxygen supply system is for providing oxygen in reactor (7).
The indirect heat exchange type supercritical water oxidation system of organic liquid waste the most according to claim 1 and mud, it is characterized in that, described material pretreatment system includes that material buffer tank (3), the entrance that the outlet of material buffer tank (3) is united with supercritical water oxidation system are connected;The entrance of material buffer tank (3) connects insoluble matter filter (1) and explosive box (20) respectively;The entrance of insoluble matter filter (1) connects material input channel, and the pipeline between outlet and material buffer tank (3) arranges grinding pump (2);Dosing pump (21) is set on the pipeline between explosive box (20) and material buffer tank (3).
The indirect heat exchange type supercritical water oxidation system of organic liquid waste the most according to claim 1 and 2 and mud, it is characterized in that, described oxygen supply system includes liquid oxygen tank (15), the outlet of liquid oxygen tank (15) is sequentially connected with liquid oxygen pump (16), liquid oxygen gasifier (17), oxygen surge tank (18) and oxygen pressure regulator (19), and the outlet of oxygen pressure regulator (19) is connected with the entrance of reactor (7).
The indirect heat exchange type supercritical water oxidation system of organic liquid waste the most according to claim 1 and 2 and mud, it is characterized in that, described supercritical water oxidation system system includes product pump (4), the entrance of product pump (4) is connected with the outlet of material pretreatment system, the outlet of product pump (4) connects preheater (5) inner tube, the inner tube outlet of preheater (5) is connected with the entrance of reactor (7), the outlet of reactor (7) connects regenerator (8) inner tube, the inner tube outlet of regenerator (8) is connected with the entrance of three phase separation subsystem by reducing transformer (9), the outlet of three phase separation subsystem discharge pipe outer with system water outlet is connected.
The indirect heat exchange type supercritical water oxidation system of organic liquid waste the most according to claim 4 and mud, it is characterized in that, described intermediate medium heat-conducting system includes blower pump for pipeline (13), the entrance of blower pump for pipeline (13) exports with the outer tube of preheater (5) and is connected, and outlet is connected with the outer tube inlet of regenerator (8);The outer tube outlet of regenerator (8) is connected by the outer tube inlet of heater (14) with preheater (5).
The indirect heat exchange type supercritical water oxidation system of organic liquid waste the most according to claim 5 and mud, it is characterised in that be additionally provided with pressure regulator (22) on the pipeline between described blower pump for pipeline (13) and preheater (5).
The indirect heat exchange type supercritical water oxidation system of organic liquid waste the most according to claim 6 and mud, it is characterized in that, also include sweet-water tank (6), the outlet of sweet-water tank (6) is divided into two-way, one tunnel is connected on the pipeline between preheater (5) and blower pump for pipeline (13), and another road is connected to the porch of product pump (4).
The indirect heat exchange type supercritical water oxidation system of organic liquid waste the most according to claim 4 and mud, it is characterized in that, described reducing transformer (9) outlet is sequentially connected with gas-liquid separator (10) and online micro-filter (11), and the outlet of online micro-filter (11) discharge pipe outer with system water outlet is connected.
The indirect heat exchange type supercritical water oxidation system of organic liquid waste the most according to claim 4 and mud, it is characterized in that, described reducing transformer (9) outlet is sequentially connected with online micro-filter (11) and gas-liquid separator (10), and the outlet of gas-liquid separator (10) discharge pipe outer with system water outlet is connected.
The indirect heat exchange type supercritical water oxidation system of organic liquid waste the most according to claim 4 and mud, it is characterized in that, the outlet of described reducing transformer (9) connects three phase separator (12), and the liquid outlet of three phase separator (12) discharge pipe outer with system water outlet is connected.
CN201620184312.7U 2016-03-10 2016-03-10 Indirect heat exchange type supercritical water oxidation system of organic waste liquid and mud CN205442756U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105600914A (en) * 2016-03-10 2016-05-25 西安交通大学 Indirect heat exchange type supercritical water oxidation system for organic wastewater and sludge

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105600914A (en) * 2016-03-10 2016-05-25 西安交通大学 Indirect heat exchange type supercritical water oxidation system for organic wastewater and sludge
CN105600914B (en) * 2016-03-10 2018-09-04 西安交通大学 A kind of indirect heat exchange type supercritical water oxidation system of organic liquid waste and sludge

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