Heat exchange-reaction integrated super-subcritical water oxidation reactor and method

Abstract

The invention discloses a heat exchange-reaction integrated super-subcritical water oxidation reactor and method, the reactor comprises an outer cylinder, an inner cylinder and a lower support plate, the inner cylinder and the lower support plate are arranged in the outer cylinder, and a water storage chamber is formed between the lower support plate and the bottom of the outer cylinder; the interior of the inner barrel is divided into a catalytic reaction area and a preheating heat exchange area by an upper supporting plate, a plurality of heat exchange pipes arranged in an array are arranged in the preheating heat exchange area, upper ports of the heat exchange pipes are communicated with the catalytic reaction area, and lower ports of the heat exchange pipes are communicated with the water storage chamber; a lower port of the central flow guide pipe is communicated with the preheating heat exchange area, and an upper port of the central flow guide pipe upwards penetrates through a catalyst bed layer of the catalytic reaction area; a material inlet and a material outlet are formed in the outer barrel, and raw material liquid introduced from the material inlet can enter the preheating heat exchange area to be in contact with the outer wall of the heat exchange pipe for heat exchange. A conventional heat exchanger and a super-subcritical reactor are combined into an independent structure integrating a heat exchange function and an oxidation reaction function, the occupied area is small, and the material price of the reactor is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of super subcritical water oxidation in the environmental protection industry, and in particular to a heat exchange-reaction integrated super subcritical water oxidation reactor and method. Background Art

[0002] Supercritical-Subcritical Water oxidation is a green and efficient advanced oxidation technology. It has good technical advantages and broad application prospects in the treatment of industrial wastewater and waste. Subcritical water oxidation technology refers to the oxidation reaction of materials in subcritical water (subcritical water refers to the state where the temperature and pressure of water are lower than the critical water temperature or critical water pressure, and the density is greater than the critical water density). Subcritical water oxidation technology has the advantages of supercritical water oxidation technology, which is fast and efficient, to a certain extent, and the oxidation conditions are not as harsh as supercritical water.

[0003] In the process of treating high-salt and high-concentration organic wastewater with subcritical water oxidation technology, since the reaction needs to be carried out under high temperature and high pressure conditions, there may be some problems: first, the reaction cylinder will rust, causing equipment damage and failure; second, the heat of the high-temperature reaction liquid after the reaction cannot be efficiently utilized; third, the equipment manufacturing cost is high; fourth, the equipment occupies a large area.

[0004] Therefore, when treating high-salt and high-concentration organic wastewater, we can achieve the following goals through the reasonable design of processes and equipment: (1) Recover the reaction heat by using the high-temperature reaction liquid to heat the materials to be reacted, improve the heat utilization rate, achieve heat self-sufficiency, and reduce operating costs; (2) Reduce the use of high-value corrosion-resistant and high-temperature resistant metal materials, which not only avoids corrosion of the cylinder, but also reduces the manufacturing cost of the equipment; (3) Make full use of space resources and reduce the footprint of the equipment. Summary of the invention

[0005] In view of the above technical problems existing in the prior art, the purpose of this application is to provide a heat exchange-reaction integrated super subcritical water oxidation reactor and method. The present invention combines a conventional heat exchanger and a super subcritical reactor into an independent structure integrating heat exchange function and oxidation reaction function. First, it saves floor space, reduces the risk of equipment leakage, and reduces the use of high-priced materials; secondly, it improves the space utilization rate of the equipment and the heat utilization rate of the reaction liquid. Ultimately, it can achieve a reduction in the manufacturing and operating costs of super subcritical water oxidation equipment.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0007] A heat exchange-reaction integrated super subcritical water oxidation reactor comprises an outer cylinder, an inner cylinder and a lower support plate arranged from top to bottom in the inner cylinder, a water storage chamber is formed between the lower support plate and the bottom of the outer cylinder; an upper support plate is arranged inside the inner cylinder and is divided into an upper catalytic reaction zone and a lower preheating heat exchange zone by the upper support plate, a porous support plate is arranged at the bottom of the inner cylinder, and the catalytic reaction zone is provided with a catalyst bed; a plurality of arrayed heat exchange tubes are arranged in the preheating heat exchange zone, the preheating heat exchange zone outside the heat exchange tube is a shell-side heat exchange chamber, the upper end of the heat exchange tube is connected to the upper support plate and communicated with the catalytic reaction zone, and the lower end of the heat exchange tube passes through the porous support plate and is connected to the lower support plate and communicated with the water storage chamber; the outer cylinder is divided into an upper area and a lower area by the lower support plate, and the upper area of ​​the outer cylinder and the inner cylinder are divided into two relatively independent functional areas by the porous support plate.

[0008] A central flow guide pipe is also provided at the center of the catalytic reaction zone, the lower end of the central flow guide pipe is connected to the upper support plate and communicated with the preheating heat exchange zone, and the upper end of the central flow guide pipe passes upward through the catalyst bed; a material inlet and a material outlet are provided on the outer cylinder, and the raw material liquid introduced from the material inlet can flow through the porous support plate through the area above the lower support plate, enter the preheating heat exchange zone, and contact with the outer wall of the heat exchange tube for heat exchange; the material outlet is communicated with the water storage chamber;

[0009] An oxidant disperser is also arranged in the lower end of the outer cylinder, and the oxidant disperser is arranged close to the upper part of the lower supporting plate.

[0010] The diverter chamber and the reaction liquid distribution buffer chamber are located at the upper and lower parts of the catalyst bed respectively. The function of the diverter chamber is to further mix the materials to be reacted with the oxidant to achieve a better treatment effect; the purpose of the reaction liquid distribution buffer chamber is to reduce the material outlet speed and increase its residence time in the heat exchange tube, ensuring that the high-temperature reaction liquid fully exchanges heat with the relatively low-temperature materials to be reacted in the shell-side heat exchange chamber, thereby achieving efficient heat recovery and reuse.

[0011] Furthermore, the catalyst bed includes a perforated support plate and an oxidation catalyst particle layer filled and stacked on the upper surface of the perforated support plate, the perforated support plate and the upper support plate are spaced apart to form a reaction liquid distribution buffer chamber therebetween, the upper surface of the oxidation catalyst particle layer and the inner wall of the top of the inner cylinder are spaced apart to form a diversion chamber therebetween; the central flow guide pipe passes through the center of the oxidation catalyst particle layer and its upper port extends into the diversion chamber.

[0012] The catalyst bed is located in the upper area of ​​the inner cylinder, and the catalyst is supported by a perforated support plate, with a central guide pipe in the middle. The materials to be reacted after being heated in the shell-side heat exchange chamber enter the diversion chamber along the central guide pipe, and then enter the catalyst bed for reaction, so that the materials can fully react and the effluent quality is guaranteed.

[0013] The water storage chamber is located in the lower area of ​​the outer cylinder. The high-temperature reaction liquid inside the heat exchange tube enters the water storage chamber after heat exchange in the shell-side heat exchange chamber. The cooled reaction liquid is buffered in the water storage chamber and then enters the next cooling system from the material outlet.

[0014] Furthermore, the heat exchange tube is connected to the upper support plate, the porous support plate and the lower support plate as a whole by welding.

[0015] Furthermore, a gap is provided between the outer wall of the inner cylinder and the inner wall of the outer cylinder, and a heater is provided in the annular gap between the gap to preheat the raw material liquid flowing through; the material inlet is provided at the top of the upper end of the outer cylinder, and the raw material liquid introduced from the material inlet reaches the lower support plate along the annular gap between the outer wall of the inner cylinder and the inner wall of the outer cylinder, mixes with the oxidant sprayed from the oxidant disperser, and then passes through the porous support plate into the shell-side heat exchange chamber of the inner cylinder to obtain heat through heat exchange.

[0016] Furthermore, an upper end cap and a lower end cap are installed on the top and bottom of the outer cylinder respectively, and both the upper end cap and the lower end cap are circular cap structures, which can be detachably connected to the two ends of the outer cylinder; the upper end cap and the lower end cap are first placed in the corresponding grooves at the two ends of the outer cylinder, and then connected and sealed to the outer cylinder through the fixing action of the hollow circular cover and the bolts. The lower end cap located in the lower area of ​​the outer cylinder is provided with a drainage channel for the discharge of the materials after the reaction.

[0017] Furthermore, the outer cylinder is made of a material that is resistant to high pressure but not resistant to high temperature, and is generally made of ordinary stainless steel, such as ferritic stainless steel, and the inner wall is coated with an anti-corrosion coating; the inner cylinder is relatively in a high-temperature environment, and is generally made of an alloy material with high heat resistance and better corrosion resistance, and its material may not be resistant to high pressure, for example, titanium alloy may be selected.

[0018] The heat exchange tube in the present invention has both the function of guiding flow and the function of transferring heat. The high-temperature reaction liquid after the reaction heats the materials to be reacted before the reaction, thus achieving self-heating.

[0019] The catalyst bed is arranged in the upper area inside the inner cylinder, and the catalyst can be replaced irregularly, and different types of catalysts can also be replaced according to reaction requirements.

[0020] Furthermore, the oxidant disperser includes a mosquito coil and a liquid inlet branch connected thereto, a plurality of liquid outlet holes are evenly arranged on the top of the mosquito coil, the mosquito coil is arranged in the outer cylinder body close to the top of the lower support plate, and one end of the liquid inlet branch passes through the side wall of the outer cylinder body.

[0021] A subcritical water catalytic oxidation method adopts the above-mentioned heat exchange-reaction integrated super subcritical water oxidation reactor to react, introduces raw material liquid into the material inlet, and the raw material liquid reaches the upper part of the lower support plate to contact and mix with the oxidant released by the oxidant disperser, and then enters the shell heat exchange chamber through the holes on the porous support plate, and the oxidant and the material to be reacted obtain heat through heat exchange and then heat up, thereby accelerating the reaction; the mixed liquid then passes through a central guide pipe and enters the catalyst bed layer of the catalytic reaction zone to undergo oxidation reaction, and the oxidation reaction releases heat to heat the reaction liquid, and the generated high-temperature reaction liquid evenly drips onto the upper support plate and enters the inside of the heat exchange tube, and the high-temperature reaction liquid inside the heat exchange tube exchanges heat with the material to be reacted and the oxidant in the shell heat exchange chamber, heats the material to be reacted and the oxidant, and then achieves heat recovery and reuse; after heat transfer in the shell heat exchange chamber, the high-temperature reaction liquid finally reaches the water storage chamber and is discharged through the material outlet.

[0022] Furthermore, the raw material liquid is high-salt and high-concentration organic wastewater, for example, it can be pharmaceutical wastewater, that is, high COD (50,000-100,000 mg / L) organic wastewater with a salt content of 4wt%-15wt%.

[0023] The catalytic oxidation method of the present invention has the following characteristics: 1. The high-temperature fluid after the reaction can heat the raw material liquid to the temperature required for the reaction by passing through the heat exchange chamber; 2. The catalyst bed further undergoes an oxidation reaction (lowering the temperature required for the reaction and releasing a large amount of heat), which makes the fluid temperature after the catalyst bed reaction much higher than the temperature of the liquid to be reacted, thereby achieving self-heating and reducing the heat provided by the outside.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1) The reactor of the present invention is provided with two inner and outer cylinders with different functions, one is an outer cylinder with high pressure resistance but not high temperature resistance, and the other is an inner cylinder for subcritical water oxidation reaction and heat exchange of organic wastewater, the inner cylinder is not resistant to high pressure but resistant to high temperature and corrosion. The relatively low temperature material to be reacted enters the shell side heat exchange chamber, and the high temperature reaction liquid generated by the supercritical oxidation reaction enters the inside of the heat exchange tube. The high temperature reaction liquid inside the heat exchange tube transfers the heat it carries to the material to be reacted outside the tube wall through its tube wall, that is, heat exchange occurs with the material to be reacted and the oxidant in the shell side heat exchange chamber, so that the material outside the tube wall of the guide tube reaches the required temperature for the reaction. The reactor fully utilizes the reaction heat after the subcritical water oxidation reaction, achieves heat recovery and reuse, realizes self-heating of the reaction, and can even output heat (steam) for the oxidation reaction of high-concentration organic wastewater, reducing the cost required for external heating, thereby reducing the operating cost of the equipment.

[0026] 2) The present invention combines a conventional heat exchanger and a super-subcritical reactor into an independent structure that integrates heat exchange function and oxidation reaction function. Since the reactor is an integrated structure, first, it avoids the large floor space caused by the use of multiple instruments and equipment, greatly improving the space utilization rate of the equipment and the heat utilization rate of the reaction liquid; second, it reduces the risk of leakage caused by the connection between multiple instruments and equipment; third, the material requirement for the outer cylinder of the integrated reactor is that it may not be resistant to high temperature, but must be resistant to high pressure; the material requirement for the inner wall of the inner cylinder and the pipe fittings in the inner cylinder is that it may not be resistant to high pressure, but must be resistant to high temperature and corrosion. This reduces the use of high-priced corrosion-resistant, high-temperature-resistant and other materials, and to a certain extent also reduces the manufacturing cost of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of a heat exchange-reaction integrated super subcritical water oxidation reactor of the present invention;

[0028] Among them: 01. Upper end cover; 02. Bolts; 03. Hollow round cover; 04. Outer cylinder; 05. Insulation layer; 06. Heat exchange tube; 07. Porous support plate; 08. Oxidant disperser; 09. Material outlet; 10. Material inlet; 11. Diversion chamber; 12. Catalyst bed; 13. Central guide pipe; 14. Perforated support plate; 15. Inner cylinder; 16. Reaction liquid distribution buffer chamber; 17. Upper support plate; 18. Shell-side heat exchange chamber; 19. Lower support plate; 20. Water storage chamber; 21. Lower end cover. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with specific embodiments, but the protection scope of the present invention is not limited thereto.

[0030] Referring to the attached examples of the present invention, Figure 1 , more clearly and completely describes the example embodiments disclosed in the present invention. The described embodiments are part of the embodiments of the present invention, not all of the embodiments. In addition, the technical features involved in different implementations of the present invention can be combined with each other as long as they do not conflict with each other. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0031] An embodiment of the present invention provides a heat exchange-reaction integrated super subcritical water oxidation reactor, comprising: an upper end cover 01, an outer cylinder 04, an inner cylinder 15, a plurality of built-in heat exchange tubes 06, a diversion chamber 11, a catalyst bed 12, a reaction liquid distribution buffer chamber 16, an oxidant disperser 08, a water storage chamber 20, and a lower end cover 21.

[0032] The upper end cover head 01 and the lower end cover head 21 are respectively installed on the top and the bottom of the outer cylinder 04. The upper end cover head 01 and the lower end cover head 02 are both circular cover head structures, which can be detachably connected to the two ends of the outer cylinder 04; the upper end cover head 01 and the lower end cover head 21 are first placed in the corresponding grooves at the two ends of the outer cylinder 04, and then the upper end cover head 01 and the lower end cover head 21 are connected and sealed to the outer cylinder 04 through the fixing action of the hollow circular cover 03 and the bolts 02.

[0033] An inner cylinder 15 is arranged along the center of the inner cavity in the outer cylinder 04, and the upper area of ​​the outer cylinder 04 and the inner cylinder 15 are divided into two relatively independent functional areas by the porous support plate 07. At the same time, the outer cylinder 04 is divided into an upper area and a lower area by the lower support plate 19. The upper area formed between the upper end cover 01 and the lower support plate 19 provides a place for material preheating, heat exchange and reaction, and the lower end cover 21 and the lower support plate 19 form a water storage chamber 20.

[0034] An upper support plate 17 is arranged inside the inner cylinder 15 and is divided into an upper catalytic reaction zone and a lower preheating heat exchange zone by the upper support plate 17. A porous support plate 07 is arranged at the bottom of the inner cylinder 15, and the catalytic reaction zone is provided with a catalyst bed 12; a plurality of array-arranged heat exchange tubes 06 are arranged in the preheating heat exchange zone, and the preheating heat exchange zone outside the heat exchange tube 06 is the shell-side heat exchange chamber 18, and the upper end of the heat exchange tube 06 is connected to the upper support plate 17 and communicated with the catalytic reaction zone, and the lower end of the heat exchange tube 06 passes through the porous support plate 07 and is connected to the lower support plate 19 and communicated with the water storage chamber 20.

[0035] The catalyst bed 12 includes a perforated support plate 14 and an oxidation catalyst particle layer filled and stacked on the upper surface of the perforated support plate 14. The perforated support plate 14 and the upper support plate 17 are spaced apart to form a reaction liquid distribution buffer chamber 16 therebetween. The upper surface of the oxidation catalyst particle layer and the inner wall of the top of the inner cylinder 15 are spaced apart to form a diversion chamber 11 therebetween.

[0036] A central flow guide pipe 13 is arranged at the center of the catalytic reaction zone, and the lower end of the central flow guide pipe 13 is connected to the upper support plate 17 and communicated with the preheating heat exchange zone, that is, the lower end of the central flow guide pipe 13 is communicated with the shell-side heat exchange chamber 18. The upper end of the central flow guide pipe 13 passes through the catalyst bed 12 upward, and the central flow guide pipe 13 passes through the center of the oxidation catalyst particle layer and its upper end extends into the diversion chamber 11. The outer cylinder 04 is provided with a material inlet 10 and a material outlet 9. The raw material liquid introduced from the material inlet 10 can flow through the porous support plate 07 through the area above the lower support plate 19, enter the preheating heat exchange zone, and contact with the outer wall of the heat exchange tube 06 for heat exchange; the material outlet 9 is communicated with the water storage chamber 20; for comparison Figure 1 The material outlet 9 is arranged in the lower end cover 21.

[0037] A gap is set between the outer wall of the inner cylinder 15 and the inner wall of the outer cylinder 04, and the material inlet 10 is set at the top of the upper end of the outer cylinder 04. The raw material liquid introduced from the material inlet 10 reaches the lower support plate 19 along the annular gap between the outer wall of the inner cylinder 15 and the inner wall of the outer cylinder 04, mixes with the oxidant sprayed from the oxidant disperser 08, and then passes through the porous support plate 07 into the shell-side heat exchange chamber 18 of the inner cylinder 15 to obtain heat through heat exchange.

[0038] An oxidant disperser 08 is also disposed in the lower end of the outer cylinder 04, and the oxidant disperser 08 is disposed close to the upper portion of the lower support plate 19. The heat exchange tube 06 is connected to the upper support plate 17, the porous support plate 07 and the lower support plate 19 as a whole by welding.

[0039] The raw material liquid is preheated in the annular gap interlayer between the outer cylinder 04 and the inner cylinder 15 and reaches the bottom of the upper area of ​​the outer cylinder 04. It is then blocked by the lower support plate 19 and mixed with the oxidant sprayed from the oxidant disperser 08. It then passes through the porous support plate 07 and enters the shell-side heat exchange chamber 18 of the inner cylinder 15 to obtain heat to reach the temperature required for the subcritical water oxidation reaction. It then passes through the central guide pipe 13 of the inner cylinder 15 and enters the diversion chamber 11 for reaction, and finally enters the catalyst bed 12 for further catalytic oxidation reaction. The generated high-temperature reaction liquid then passes through the perforated support plate 14 and enters the built-in heat exchange tube 06, and then enters the water storage chamber 20 along the heat exchange tube 06, and finally reaches the material outlet 09.

[0040] The outer side of the outer cylinder 04 is also provided with a heat preservation layer 5. The outer cylinder is made of a material that is resistant to high pressure but not resistant to high temperature, and is generally made of ordinary stainless steel, such as ferritic stainless steel, and the inner wall is plated with an anti-corrosion coating; the inner cylinder is relatively in a high temperature environment, and is generally made of an alloy material with high heat resistance and better corrosion resistance, and its material may not be resistant to high pressure, such as titanium alloy.

[0041] In some preferred embodiments, the upper area of ​​the reactor is separated into two functional areas by a porous support plate 07. The porous support plate 07 allows the mixed reactant material and oxidant to enter the shell-side heat exchange chamber 18. Since the porous support plate 07 has a number of fine holes, the amount of reactant material passing through the porous support plate 07 per unit time becomes smaller, thereby increasing the residence time of the reactant material and oxidant in the shell-side heat exchange chamber 18, allowing the reactant material and oxidant to fully exchange heat with the high-temperature reaction liquid, so that the temperature of the reactant material reaches the required reaction temperature.

[0042] In some preferred embodiments, the porous support plate 07 is a thin metal plate with fine holes having an area equal to the cross-sectional area of ​​the inner cylinder 15 , and is fixed to the side wall of the inner cylinder 15 by welding part of its edge.

[0043] In some preferred embodiments, the built-in heat exchange tube 06 is fixed by an upper support plate 17 , a porous support plate 07 and a lower support plate 19 .

[0044] In some preferred embodiments, the oxidant disperser 08 includes a mosquito coil-type coil and a liquid inlet branch pipe connected thereto, a plurality of liquid outlet holes are evenly arranged on the top of the mosquito coil-type coil, the mosquito coil-type coil is arranged in the outer cylinder body 04 close to the top of the lower support plate 19, and one end of the liquid inlet branch pipe passes through the side wall of the outer cylinder body 04.

[0045] In some preferred embodiments, the catalyst bed 12 is fixed between the perforated support plate 14 and the diversion chamber 11, and the solid catalyst required for the reaction is laid in the catalyst bed 12, so that the material undergoes a catalytic oxidation reaction in the bed, and the reacted material further enters the reaction liquid distribution buffer chamber 16.

[0046] In some preferred embodiments, the heat exchange tube 06 and the central flow guide tube 13 are both anti-corrosion and high temperature resistant metal straight tubes with special functions. The heat exchange tube 06 is evenly distributed in the inner cylinder 15, and is fixed by the upper support plate 17, the porous support plate 07 and the lower support plate 19. The upper part is connected to the reaction liquid distribution buffer chamber 16, the middle part is connected to the shell side heat exchange chamber 18, and the lower part is connected to the water storage chamber 20; the central flow guide tube 13 passes through the catalyst bed from the center of the cylinder, the lower end is connected to the heat exchange chamber 18, and the upper end extends into the diversion chamber 11 and communicates with it.

[0047] The present invention also provides an implementation of a subcritical water oxidation method, using the heat exchange-reaction integrated super subcritical water oxidation reactor in the above embodiment, comprising the following steps:

[0048] The raw material liquid is introduced into the material inlet 10, and after being preheated along the annular gap between the outer cylinder 04 and the inner cylinder 15, it reaches the bottom of the lower area of ​​the outer cylinder 04;

[0049] The material is mixed with the oxidant sprayed from the oxidant disperser 08 by the blocking effect of the lower support plate 19, and then enters the shell-side heat exchange chamber 18 through the fine holes on the porous support plate 07. The oxidant and the material to be reacted obtain heat in the shell-side heat exchange chamber 18 and reach the temperature required for the reaction;

[0050] The mixed materials to be reacted pass through the central guide pipe 13 again to enter the diversion chamber 11 and the catalyst bed 12 for oxidation reaction. The high-temperature reaction liquid after the oxidation reaction enters the heat exchange pipe 06, and heat exchange occurs in the shell-side heat exchange chamber 18, transferring the heat to the materials to be reacted, thereby achieving heat recovery and reuse;

[0051] After the high-temperature reaction liquid passes through the shell-side heat exchange chamber 18 for heat transfer, it finally reaches the water storage chamber 20 and then enters the next system through the material outlet 09.

[0052] The lower support plate 19, the upper support plate 17, the perforated support plate 14 and the porous support plate 07 are all made of special anti-corrosion and high-temperature resistant metal materials, and are fixed in the corresponding cylinder by welding.

[0053] The contents described in this specification are merely an enumeration of implementation forms of the inventive concept, and the protection scope of the present invention should not be regarded as being limited to the specific forms described in the embodiments.

Claims

1. A heat exchange-reaction integrated super subcritical water oxidation reactor, characterized in that: It comprises an outer cylinder (04) and an inner cylinder (15) and a lower support plate (19) arranged in an interval from top to bottom inside the outer cylinder (04), wherein a water storage chamber (20) is formed between the lower support plate (19) and the bottom of the outer cylinder (04); an upper support plate (17) is arranged inside the inner cylinder (15) and is divided into an upper catalytic reaction zone and a lower preheating heat exchange zone by the upper support plate (17); a porous support plate (07) is arranged at the bottom of the inner cylinder (15), and the catalytic reaction zone is provided with a catalyst bed (12); a plurality of heat exchange tubes (06) arranged in an array are arranged in the preheating heat exchange zone, and the preheating heat exchange zone outside the heat exchange tube (06) is a shell-side heat exchange chamber (18); the upper end of the heat exchange tube (06) is connected to the upper support plate (17) and communicates with the catalytic reaction zone, and the lower end of the heat exchange tube (06) passes through the porous support plate (07) and is connected to the lower support plate (19) and communicates with the water storage chamber (20); A central flow guide pipe (13) is also provided at the center of the catalytic reaction zone, the lower end of the central flow guide pipe (13) is connected to the upper support plate (17) and communicates with the preheating heat exchange zone, and the upper end of the central flow guide pipe (13) passes through the catalyst bed (12) upward; the outer cylinder (04) is provided with a material inlet (10) and a material outlet (9), and the raw material liquid introduced from the material inlet (10) can flow through the porous support plate (07) through the area above the lower support plate (19), enter the preheating heat exchange zone, and contact with the outer wall of the heat exchange tube (06) for heat exchange; the material outlet (9) is communicated with the water storage chamber (20); An oxidant disperser (08) is also disposed in the lower end of the outer cylinder (04), and the oxidant disperser (08) is disposed close to the top of the lower support plate (19).

2. A heat exchange-reaction integrated super subcritical water oxidation reactor according to claim 1, characterized in that: The catalyst bed (12) comprises a perforated support plate (14) and an oxidation catalyst particle layer filled and stacked on the upper surface of the perforated support plate (14); the perforated support plate (14) and the upper support plate (17) are spaced apart and a reaction liquid distribution buffer chamber (16) is formed between the two; the upper surface of the oxidation catalyst particle layer and the inner wall of the top of the inner cylinder (15) are spaced apart and a flow distribution chamber (11) is formed between the two; the central flow guide pipe (13) passes through the center of the oxidation catalyst particle layer and its upper end extends into the flow distribution chamber (11).

3. The heat exchange-reaction integrated super subcritical water oxidation reactor according to claim 1, characterized in that: The heat exchange tube (06) is connected to the upper support plate (17), the porous support plate (07) and the lower support plate (19) as a whole through welding.

4. The heat exchange-reaction integrated super subcritical water oxidation reactor according to claim 1, characterized in that: A gap is provided between the outer wall of the inner cylinder (15) and the inner wall of the outer cylinder (04), and a heater is provided in the annular gap between the gap to preheat the raw material liquid flowing through; the material inlet (10) is provided at the top of the upper end of the outer cylinder (04), and the raw material liquid introduced from the material inlet (10) reaches the lower support plate (19) along the annular gap between the outer wall of the inner cylinder (15) and the inner wall of the outer cylinder (04), mixes with the oxidant sprayed from the oxidant disperser (08), and then passes through the porous support plate (07) into the shell side heat exchange chamber (18) of the inner cylinder (15) to obtain heat through heat exchange.

5. The heat exchange-reaction integrated super subcritical water oxidation reactor according to claim 1, characterized in that: An upper end cover (01) and a lower end cover (21) are respectively installed on the top and bottom of the outer cylinder (04); both the upper end cover (01) and the lower end cover (02) are circular cover structures and are detachably connected to the two ends of the outer cylinder (04); the upper end cover (01) and the lower end cover (21) are first placed in corresponding grooves at the two ends of the outer cylinder (04), and then the upper end cover (01) and the lower end cover (21) are connected and sealed to the outer cylinder (04) through the fixing action of the hollow circular cover (03) and the bolts (02).

6. The heat exchange-reaction integrated super subcritical water oxidation reactor according to claim 1, characterized in that: The outer cylinder (04) is made of a material that is resistant to high pressure but not high temperature, such as ferritic stainless steel, and the inner wall surface is plated with an anti-corrosion coating; the inner cylinder (15) is made of a material that is resistant to heat preservation corrosion but not high pressure, such as titanium alloy.

7. The heat exchange-reaction integrated super subcritical water oxidation reactor according to claim 1, characterized in that: The oxidant disperser (08) comprises a mosquito coil and a liquid inlet branch pipe connected thereto, a plurality of liquid outlet holes being evenly arranged on the top of the mosquito coil, the mosquito coil being arranged inside the outer cylinder (04) near the top of the lower support plate (19), and one end of the liquid inlet branch pipe passing through the side wall of the outer cylinder (04).

8. A subcritical water catalytic oxidation method, characterized in that A heat exchange-reaction integrated super subcritical water oxidation reactor as described in any one of claims 1 to 7 is used for reaction, a raw material liquid is introduced into a material inlet (10), the raw material liquid reaches the top of a lower support plate (19) and contacts and mixes with an oxidant released by an oxidant disperser (08), and then enters a shell heat exchange chamber (18) through a hole on a porous support plate (07), the oxidant and the material to be reacted obtain heat through heat exchange and are heated to a temperature required for the reaction, thereby accelerating the reaction; the mixed liquid then passes through a central guide tube (13), and is discharged through an upper port of the central guide tube (13) to the The heat overflows from all sides and enters the catalyst bed (12) in the catalytic reaction zone for oxidation reaction. The oxidation reaction releases heat to raise the temperature of the reaction liquid. The generated high-temperature reaction liquid evenly drips onto the upper support plate (17) and enters the interior of the heat exchange tube (06). The high-temperature reaction liquid in the heat exchange tube (06) exchanges heat with the materials to be reacted and the oxidant in the shell-side heat exchange chamber (18), thereby heating the materials to be reacted and the oxidant, thereby achieving heat recovery and reuse. After the high-temperature reaction liquid transfers heat in the shell-side heat exchange chamber (18), it finally reaches the water storage chamber (20) and is discharged through the material outlet (09).

9. A subcritical water catalytic oxidation method as claimed in claim 8, characterized in that The raw material liquid is high-salt and high-concentration organic sewage.

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