CN111632569B - Flow corrosion-salt deposition device for supercritical water oxidation reaction coupling - Google Patents
Flow corrosion-salt deposition device for supercritical water oxidation reaction coupling Download PDFInfo
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- CN111632569B CN111632569B CN202010445450.7A CN202010445450A CN111632569B CN 111632569 B CN111632569 B CN 111632569B CN 202010445450 A CN202010445450 A CN 202010445450A CN 111632569 B CN111632569 B CN 111632569B
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/24—Stationary reactors without moving elements inside
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0006—Controlling or regulating processes
- B01J19/0013—Controlling the temperature of the process
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0053—Details of the reactor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J4/00—Feed or outlet devices; Feed or outlet control devices
- B01J4/001—Feed or outlet devices as such, e.g. feeding tubes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00049—Controlling or regulating processes
- B01J2219/00051—Controlling the temperature
- B01J2219/00074—Controlling the temperature by indirect heating or cooling employing heat exchange fluids
- B01J2219/00087—Controlling the temperature by indirect heating or cooling employing heat exchange fluids with heat exchange elements outside the reactor
- B01J2219/00094—Jackets
Abstract
A flow corrosion-salt deposition device for coupling supercritical water oxidation reaction comprises a supercritical water oxidation coupling section, a flow corrosion-salt deposition testing section and a connecting pipeline section, wherein the supercritical water oxidation coupling section comprises a main pipe section, an organic matter mixer and an oxidant mixer, a material channel consisting of a tapered cavity, a throat cavity and a tapered cavity which are sequentially communicated from front to back is arranged in the main pipe section, a thermocouple and a pressure taking port are arranged at the rear end of the tapered cavity, and the organic matter mixer and the oxidant mixer are arranged outside the main pipe section; the flowing corrosion-salt deposition test section comprises a test pipe section, an electric heater is arranged at the front section of the exterior of the test pipe section, a cooling water jacket is arranged at the rear section of the exterior, and a thermocouple and a pressure tapping are arranged in the middle of the exterior; the connecting pipeline section comprises a connecting pipeline which is directly communicated with the rear end of the testing pipeline section and is provided with a thermocouple and a pressure tapping hole. The invention can solve the problems of corrosion and salt deposition in supercritical water oxidation, and explores the microscopic corrosion characteristics of materials and the crystallization and deposition characteristics of inorganic salt.
Description
Technical Field
The invention belongs to the technical fields of energy, chemical industry, environmental protection and materials, and particularly relates to a flowing corrosion-salt deposition device for supercritical water oxidation reaction coupling.
Background
The supercritical water oxidation treatment range is wide, and waste almost containing organic matters can be treated by adopting the technology. The technology has excellent effects in the aspects of treating phenolic compounds, polychlorinated biphenyl organic matters, pesticides, fuel intermediate aniline, sludge, human metabolites and other pollutants. From the perspective of sustainable development of the environment and industrial development, the supercritical water oxidation technology is a new green and environment-friendly technology with a great prospect.
The supercritical water oxidation treatment technology has the following unique advantages:
1. the reaction speed is very fast, and the removal rate is high. In the supercritical water oxidation process, organic matters and air (or oxygen) can be mutually dissolved in the supercritical water, interphase interfaces disappear, the diffusion coefficient is 10-100 times that of common liquid water, and the heat and mass transfer rate is high, so that the reaction rate is very high, and the removal rate of most of the organic matters can reach more than 99.99 percent within short retention time (from a few seconds to a few minutes).
2. No secondary pollution. The hydrocarbons may eventually be oxidized to CO2And H2O, nitrogen in organic waste is oxidized into N2And N2O and the like; hetero atoms such as sulfur, chlorine, phosphorus and the like are respectively converted into corresponding inorganic acids (such as sulfate radicals, hydrochloric acid radicals and phosphate radicals) and are neutralized with alkali liquor to form corresponding inorganic salts; the cation forms an oxide or combines with acid radical ions to generate inorganic salt. Does not generate any pollution gas, thoroughly degrades and removes toxic wastes and pathogens to meet the requirement of harmless treatment. Several researchers have investigated the possibility of oxidative degradation of a range of toxic substances including dioxins, polychlorinated biphenyls, cyanides, phenols, etc. in supercritical water.
3. The energy consumption is low. When the mass fraction of the organic matters in the wastewater is more than 2-5%, the heat balance required by the reaction can be maintained by means of the reaction heat released in the reaction process, and an external heat source or fuel is not needed; when the content of organic matters in the wastewater is higher, heat can be supplied to the outside of the system.
4. The product is easy to separate and recover. Inorganic salts and metal oxides have low solubility in supercritical water, and when organic wastes are treated by supercritical water oxidation, the inorganic salts and metal oxides are often precipitated in the form of crystals, are easily separated in the form of solids, and can be recycled. After the reaction product is cooled and depressurized, CO can be directly recovered2And sale, low cost CO2Certain economic benefit is obtained while trapping.
However, the technology is carried out in an environment with high temperature, high pressure and high oxygen concentration, and the harsh conditions are easy to cause corrosion to the equipment and form salt precipitates in the equipment. The corrosion not only reduces the service life of the equipment, but also causes the reaction products to contain certain metal ions (such as chromium and the like) to influence the treatment effect of the supercritical water oxidation technology. Deposited solid salts form agglomerates to cover the surface of equipment, so that the heat exchange rate is reduced, the system pressure is increased, the blockage of a reactor and a system pipeline can be caused in serious conditions, the supercritical water oxidation system cannot normally operate, and in addition, the wall surface covered by the agglomerates is often seriously corroded. Thus, in order to make this process economically practical, the bottleneck problems of corrosion and salt deposition must be solved.
Currently, the basic method for inhibiting corrosion is to select a base metal for use in different parts of the system based on the corrosion resistance characteristics of different materials. In addition, the special design of the reactor is also included, and anti-corrosion measures are added to local corrosion-prone areas of the equipment, such as installing an inner sleeve, and performing surface spraying or pre-oxidation treatment on the surface of the equipment in direct contact with a highly corrosive fluid. In addition, from the material perspective, can also adopt modes such as material preneutralization technique, material cold state to spout and dilute material to restrain pipeline, the corruption of equipment material. At present, the basic method for solving the problem of reactor blockage caused by salt deposition is to adopt a special operation technology and a special reactor structure, and specifically comprises the steps of adopting a mechanical brush, a rotary scraper, filtering, an additive, high flow rate, homogeneous deposition, extreme high pressure, a counter-current kettle type reactor, an evaporation wall type reactor, a counter-current kettle type evaporation wall reactor, a counter-current tube type reactor, a cold wall reactor, a centrifugal reactor and the like. However, the existing methods for inhibiting corrosion and solving salt deposition have respective disadvantages, and no structural design or operation technology has obvious advantages. The main reason is that under the severe condition of high-temperature and high-pressure supercritical water, the microscopic characteristics of material corrosion and the crystallization and deposition characteristics of inorganic salt are difficult to probe, so that the behavior rule can not be mastered, and the medicine can not be taken according to the symptoms.
Disclosure of Invention
In order to solve the problems of corrosion and salt deposition in supercritical water oxidation and explore the microscopic characteristics of material corrosion and the crystallization deposition characteristics of inorganic salt, the invention aims to provide a flowing corrosion-salt deposition device for supercritical water oxidation reaction coupling, which can realize the coupling environment of supercritical water oxidation reaction through the invention and design of an oxidant mixer and an organic matter mixer; the detachable inner bushing is arranged, so that corrosion products and inorganic salt crystallization deposition products are captured and collected in the supercritical water oxidation process, and later-stage sampling and test analysis are facilitated; through the arrangement of the electric heater and the cooling water jacket, hot/cold wall surface conditions with different temperatures are formed, so that the corrosion and salt crystal deposition characteristics of the fluid are influenced; through the arrangement of three groups of thermocouples and the pressure taking port, the real-time test and analysis of a temperature field and a pressure field in the supercritical water oxidation process can be realized, so that the heat release of the oxidation reaction and the process of pipeline blockage can be conveniently judged. The invention can intuitively master the microscopic characteristics of material corrosion and the crystallization and deposition characteristics of inorganic salt, further develop a targeted prevention and control technology, finally solve the problems of material corrosion, inorganic salt crystallization and pipeline blockage of a supercritical water oxidation technology, realize safe, long-term and stable operation of the system, and improve the economy and safety of the system.
In order to achieve the purpose, the invention adopts the technical scheme that:
a flowing corrosion-salt deposition device for supercritical water oxidation reaction coupling comprises a supercritical water oxidation coupling section, a flowing corrosion-salt deposition testing section and a connecting pipeline section, wherein:
the supercritical water oxidation coupling section comprises a main pipe section, an organic matter mixer 3 and an oxidant mixer 22 which are arranged outside the main pipe section, a material channel which is formed by a tapered cavity 18, a throat cavity 23 and a tapered cavity 24 which are sequentially communicated from front to back is arranged inside the main pipe section, wherein the tapered cavity 18 is connected with the material spray pipe 1, the throat cavity 23 is communicated with an outlet of the organic matter mixer 3 and an outlet of the oxidant mixer 22, and a thermocouple I5 and a pressure taking port I N4 are arranged at the rear end of the tapered cavity 24;
the flowing corrosion-salt deposition testing section comprises a testing pipe section 11, an inner bushing 12 is arranged on the inner wall of the testing pipe section 11, an electric heater 9 is arranged at the front section of the outside, a cooling water jacket 13 is arranged at the rear section of the outside, the testing pipe section 11 is directly communicated with the rear end of the divergent cavity 24, and a second thermocouple 10 and a second pressure taking port N5 are arranged between the electric heater 9 and the cooling water jacket 13 of the testing pipe section 11;
the connecting pipeline section comprises a connecting pipeline 27, the connecting pipeline 27 is directly communicated with the rear end of the test pipe section 11, and a thermocouple III 17 and a pressure taking port III N7 are arranged on the connecting pipeline 27.
The front end closed material spray pipe 1 of the tapered cavity 18 penetrates through the closed axis and extends into the tapered cavity 18, the material spray holes 19 which are obliquely arranged at equal intervals are distributed on the circumferential surface of the material spray pipe 1, and the oblique direction of the material spray holes 19 is the downstream direction.
The organic matter mixer 3 is a hollow cylindrical shell, the inner diameter of the middle of the hollow cylindrical shell is smaller than the outer diameters of the two ends of the hollow cylindrical shell, the hollow cylindrical shell is sleeved on the outer surface between the reducing cavity 18 and the throat cavity 23 to form an annular organic matter mixing cavity 2, the organic matter mixing cavity 2 is connected with the throat cavity 23 through an inclined organic matter jet orifice 20, and the inclined direction of the organic matter jet orifice 20 is the downstream direction.
The oxidant mixer 22 is a hollow cylindrical shell, the inner diameter of the middle of the oxidant mixer is smaller than the outer diameters of the two ends of the oxidant mixer, the oxidant mixer is sleeved on the outer surface of the throat cavity 23 to form an annular oxidant mixing cavity 4, the oxidant mixing cavity 4 is connected with the throat cavity 23 through inclined oxidant spray holes 21, and the inclined direction of the oxidant spray holes 21 is the downstream direction.
The taper angle of the tapered cavity 18 is larger than the taper angle of the gradually-expanding cavity 24, and the length of the throat cavity 23 is larger than the lengths of the tapered cavity 18 and the gradually-expanding cavity 24.
The inner bushing 12 is of a detachable and replaceable structure, 2-4 long grooves are formed in the inner wall of the test pipe section 11, the inner bushing 12 arranged in the test pipe section in a close fit mode is provided with the same number of long ribs, and the long grooves in the test pipe section 11 are in precise fit with the long ribs in the inner bushing 12.
The electric heater 9 and the cooling water jacket 13 are both positioned outside the test pipe section 11, and the tail end of the inner bushing 12 is positioned at the rear part of the tail end of the cooling water jacket 13; the second thermocouple 10 and the second pressure taking port N5 are positioned between the electric heater 9 and the cooling water jacket 13 and are close to the tail end of the electric heater 9; the cooling water inlet N2 is positioned at the top of the tail end of the cooling water jacket 13, and the cooling water outlet N6 is positioned at the bottom of the front end of the cooling water jacket 13.
The external tail end of the main pipe section is provided with a first high-pressure flange 7, the external front end of the test pipe section 11 is provided with a second high-pressure flange 8, the external rear end of the test pipe section is provided with a third high-pressure flange 14, the external front end of the connecting pipeline 27 is provided with a fourth high-pressure flange 15, the main pipe section is connected with the test pipe section 11 through a first fastening bolt 6, the first high-pressure flange 7 and the second high-pressure flange 8, a first sealing washer 25 is filled on the contact surface of the main pipe section and the test pipe section 11, the test pipe section 11 and the connecting pipeline 27 are connected through the third high-pressure flange 14, the fourth high-pressure flange 15 and a second fastening bolt 16, and a second sealing washer 26 is filled on the contact surface of the test pipe section 11 and the connecting pipeline 27.
The testing ends of the thermocouple I5, the thermocouple II 10 and the thermocouple III 17 are located near the wall surface of the corresponding pipeline, and the pressure taking port I N4, the pressure taking port II N5 and the pressure taking port III N7 are arranged opposite to the thermocouple I5, the thermocouple II 10 and the thermocouple III 17 respectively.
And the thermocouple III 17 and the pressure taking port III N7 are positioned at the front section of the connecting pipeline 27 close to the cooling water jacket 13.
The invention can intuitively master the microscopic characteristics of material corrosion and the crystallization and deposition characteristics of inorganic salt, further develop a targeted prevention and control technology, finally solve the problems of material corrosion, inorganic salt crystallization and pipeline blockage of a supercritical water oxidation technology, realize safe, long-term and stable operation of the system, and improve the economy and safety of the system.
Compared with the prior art, the invention has the beneficial effects that:
(1) the material, organic matter and oxidant orifice are inclined channels, horizontal and vertical component speeds are achieved after the material, organic matter and oxidant orifice enter the reaction channel, meanwhile, the reaction channel is composed of a gradually reducing cavity, a throat cavity and a gradually expanding cavity, the material, the organic matter and the oxidant can be fully mixed, and the material has a good coupling oxidation environment in supercritical water oxidation.
(2) The inner lining can be detached and replaced, the front and the back of the inner lining are provided with an electric heater and a cooling water jacket, three groups of thermocouples and pressure taking ports are arranged in front of the electric heater, between the electric heater and the cooling water jacket and behind the cooling water jacket, different parts of the inner lining sleeve have different temperatures by adjusting the power of the electric heater and the flow of the cooling water, therefore, the corrosion and salt crystal deposition characteristics of the supercritical water oxidation reaction under different temperatures and pressures can be obtained, and by replacing the inner bushing made of different materials, the corrosion and salt crystal deposition characteristics of supercritical water oxidation of different materials can be obtained through test analysis of the inner liner wall surface sample, and then the development of a targeted prevention and control technology is carried out, the problems of material corrosion, inorganic salt crystallization deposition and pipeline blockage of the supercritical water oxidation technology are finally solved, the safe, long-term and stable operation of the system is realized, and the economical efficiency and the safety of the system are improved.
(3) Through the setting of three thermoelectric couples of group and pressure taking mouth, can realize the real-time test and the analysis to supercritical water oxidation in-process temperature field and pressure field to be convenient for judge the exothermic and pipe blockage's of oxidation reaction the condition.
Drawings
FIG. 1 is a schematic view of a supercritical water oxidation reaction coupled flow corrosion-salt deposition apparatus according to the present invention;
wherein: 1 is a material spray pipe; 2 is an organic matter mixing cavity; 3 is an organic matter mixer; 4 is an oxidant mixing cavity; 5 is a thermocouple I; 6 is a fastening bolt I; 7 is a high-pressure flange I; 8 is a high-pressure flange II; 9 is an electric heater; 10 is a second thermocouple; 11 is a test pipe section; 12 is an inner bushing; 13 is a cooling water jacket; 14 is a high-pressure flange III; 15 is a high-pressure flange IV; 16 is a fastening bolt II; 17 is a thermocouple III; 18 is a tapered cavity; 19 is a material spray hole; 20 is an organic matter jet orifice; 21 is an oxidant jet orifice; 22 is an oxidant mixer; 23 is a laryngeal cavity; 24 is a gradually expanding cavity; 25 is a first sealing washer; 26 is a second sealing washer; 27 is a connecting pipeline; n1 is an oxidant inlet; n2 is a cooling water inlet; n3 is an organic matter inlet; n4 is pressure taking port I; n5 is pressure taking port II; n6 is a cooling water outlet; and N7 is pressure measuring port III.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention is described in further detail below with reference to the accompanying drawings:
as shown in fig. 1, a flowing corrosion-salt deposition apparatus for supercritical water oxidation reaction coupling comprises a supercritical water oxidation coupling section, a flowing corrosion-salt deposition testing section and a connecting pipeline section, wherein:
the supercritical water oxidation coupling section comprises a main pipe section, an organic matter mixer 3 and an oxidant mixer 22 which are arranged outside the main pipe section, a material channel which is formed by a tapered cavity 18, a throat cavity 23 and a tapered cavity 24 which are sequentially communicated from front to back is arranged inside the main pipe section, wherein the tapered cavity 18 is connected with the material spray pipe 1, the throat cavity 23 is communicated with an outlet of the organic matter mixer 3 and an outlet of the oxidant mixer 22, and a thermocouple I5 and a pressure taking port I N4 are arranged at the rear end of the tapered cavity 24;
the flowing corrosion-salt deposition testing section comprises a testing pipe section 11, an inner bushing 12 is arranged on the inner wall of the testing pipe section 11, an electric heater 9 is arranged at the front section of the outside, a cooling water jacket 13 is arranged at the rear section of the outside, the testing pipe section 11 is directly communicated with the rear end of the divergent cavity 24, and a second thermocouple 10 and a second pressure taking port N5 are arranged between the electric heater 9 and the cooling water jacket 13 of the testing pipe section 11; more specifically, the electric heater 9 and the cooling water jacket 13 are both located outside the test tube segment 11, and the tail end of the inner bushing 12 is located behind the tail end of the cooling water jacket 13; the second thermocouple 10 and the second pressure taking port N5 are positioned between the electric heater 9 and the cooling water jacket 13 and are close to the tail end of the electric heater 9; the cooling water inlet N2 is positioned at the top of the tail end of the cooling water jacket 13, and the cooling water outlet N6 is positioned at the bottom of the front end of the cooling water jacket 13;
the connecting pipeline section comprises a connecting pipeline 27, the connecting pipeline 27 is directly communicated with the rear end of the test pipe section 11, and a thermocouple III 17 and a pressure taking port III N7 are arranged on the connecting pipeline 27.
As a basic support, a first high-pressure flange 7 is arranged at the tail end of the outer portion of the main pipe section, a second high-pressure flange 8 is arranged at the front end of the outer portion of the test pipe section 11, a third high-pressure flange 14 is arranged at the rear end of the outer portion of the main pipe section, a fourth high-pressure flange 15 is arranged at the front end of the outer portion of the connecting pipe 27, the main pipe section is connected with the test pipe section 11 through a first fastening bolt 6, the first high-pressure flange 7 and the second high-pressure flange 8, a first sealing washer 25 is filled on the contact surface of the main pipe section and the test pipe section 11, the test pipe section 11 and the connecting pipe 27 are connected through the third high-pressure flange 14, the fourth high-pressure flange 15 and the second fastening bolt 16, and a second sealing washer 26 is filled on the contact surface of the test pipe section 11 and the connecting pipe 27.
According to the structure, the reaction material enters the reducing cavity 18 from the material spray pipe 1 and then enters the throat cavity 23, the material speed is increased, meanwhile, the organic matter and the oxidant respectively enter the throat cavity 23 through the organic matter mixer 3 and the oxidant mixer 22, and the material, the organic matter and the oxidant are mixed. The mixed reaction materials pass through the test pipe section 11, and different temperatures of different parts of the test pipe section 11 can be achieved by adjusting the power of the electric heater 9 and the flow of the cooling water jacket 13, so that the corrosion and salt crystallization deposition characteristics of the supercritical water oxidation reaction on the inner liner 12 are obtained.
In a more optimized embodiment of the present invention, the front end closed material nozzle 1 of the tapered cavity 18 passes through the closed axis and extends into the tapered cavity 18, the material nozzle holes 19 are distributed on the circumferential surface of the material nozzle 1 and are arranged at equal intervals in an inclined manner, and the inclined direction of the material nozzle holes 19 is the downstream direction.
The material is sprayed from the inclined material spray holes 19, so that the sprayed fluid can be dispersed and atomized, and the mixing effect of the fluid, organic matters and an oxidant is better.
In a more preferred embodiment of the present invention, the organic matter mixer 3 is a hollow cylindrical housing, the inner diameter of the middle is smaller than the outer diameters of the two ends, and the hollow cylindrical housing is sleeved on the outer surface between the tapered cavity 18 and the throat cavity 23 to form an annular organic matter mixing cavity 2, the organic matter mixing cavity 2 is provided with an organic matter inlet N3, the organic matter mixing cavity 2 is connected with the throat cavity 23 through an inclined organic matter nozzle 20, and the inclined direction of the organic matter nozzle 20 is the downstream direction. The oxidant mixer 22 is a hollow cylindrical shell, the inner diameter of the middle of the oxidant mixer is smaller than the outer diameters of the two ends of the oxidant mixer, the oxidant mixer is sleeved on the outer surface of the throat cavity 23 to form an annular oxidant mixing cavity 4, the oxidant mixing cavity 4 is provided with an oxidant inlet N1, the oxidant mixing cavity 4 is connected with the throat cavity 23 through an inclined oxidant spray hole 21, and the inclined direction of the oxidant spray hole 21 is the forward flow direction.
Organic matters and oxidant enter the organic matter mixing cavity 2 and the oxidant mixing cavity 4 through the organic matter inlet N3 and the oxidant inlet N1 respectively, and then enter the throat cavity 23 through the organic matter jet orifice 20 and the oxidant jet orifice 21 which are obliquely arranged, and at the moment, the organic matters and the oxidant have horizontal and vertical component speeds, so that materials, the organic matters and the oxidant can be fully mixed.
In a more preferred embodiment of the invention, the tapered cavity 18 has a taper angle greater than the taper angle of the diverging cavity 24, and the throat cavity 23 has a length greater than the lengths of the tapered cavity 18 and the diverging cavity 24. The gradual change angle is bigger can accelerate the material more fast, and the gradual expansion angle is less can slow down by the slower messenger material, and the two improves mixing efficiency simultaneously.
In a more preferred embodiment of the present invention, the inner bushing 12 is a detachable and replaceable structure, 2 to 4 elongated slots are formed on the inner wall of the test pipe segment 11, the inner bushing 12 tightly attached to the inside of the test pipe segment has the same number of elongated ribs, and the elongated slots on the test pipe segment 11 are precisely matched with the elongated ribs on the inner bushing 12.
In a more preferred embodiment of the present invention, the testing ends of thermocouple one 5, thermocouple two 10 and thermocouple three 17 are located near the wall of the corresponding pipe, and pressure port one N4, pressure port two N5 and pressure port three N7 are disposed opposite to thermocouple one 5, thermocouple two 10 and thermocouple three 17, respectively. Thermocouple III 17 and pressure taking opening III N7 are located the position that connecting tube 27 anterior segment is close to cooling water jacket 13, can realize the real-time test and the analysis to temperature field and pressure field in the supercritical water oxidation process to be convenient for judge the exothermic and pipe blockage's of oxidation reaction the condition.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (10)
1. A flowing corrosion-salt deposition device for supercritical water oxidation reaction coupling is characterized by comprising a supercritical water oxidation coupling section, a flowing corrosion-salt deposition testing section and a connecting pipeline section, wherein:
the supercritical water oxidation coupling section comprises a main pipe section, and an organic matter mixer (3) and an oxidant mixer (22) which are arranged outside the main pipe section, wherein a material channel consisting of a tapered cavity (18), a throat cavity (23) and a tapered cavity (24) which are sequentially communicated from front to back is arranged inside the main pipe section, the tapered cavity (18) is connected with a material spray pipe (1), the throat cavity (23) is communicated with an outlet of the organic matter mixer (3) and an outlet of the oxidant mixer (22), and a thermocouple I (5) and a pressure taking port I (N4) are arranged at the rear end of the tapered cavity (24);
the flowing corrosion-salt deposition testing section comprises a testing pipe section (11), an inner bushing (12) is arranged on the inner wall of the testing pipe section (11), an electric heater (9) is arranged on the front section of the outer portion, a cooling water jacket (13) is arranged on the rear section of the outer portion, the testing pipe section (11) is directly communicated with the rear end of the divergent cavity (24), and a second thermocouple (10) and a second pressure taking port (N5) are arranged between the electric heater (9) and the cooling water jacket (13) on the testing pipe section (11);
the connecting pipeline section comprises a connecting pipeline (27), the connecting pipeline (27) is directly communicated with the rear end of the test pipe section (11), and a thermocouple III (17) and a pressure taking port III (N7) are arranged on the connecting pipeline (27).
2. The flowing corrosion-salt deposition device for supercritical water oxidation reaction coupling according to claim 1, wherein the front end closed material nozzle (1) of the tapered cavity (18) penetrates through the axis of the closed region and extends into the tapered cavity (18), the material nozzle (1) is distributed with the material nozzle holes (19) which are arranged obliquely at equal intervals on the circumferential surface, and the oblique direction of the material nozzle holes (19) is the forward flow direction.
3. The apparatus of claim 1, wherein the organic matter mixer (3) is a hollow cylindrical housing, the inner diameter of the middle is smaller than the outer diameters of the two ends, and the housing is sleeved on the outer surface between the tapered cavity (18) and the throat cavity (23) to form an annular organic matter mixing chamber (2), the organic matter mixing chamber (2) and the throat cavity (23) are connected through inclined organic matter jet holes (20), and the inclined direction of the organic matter jet holes (20) is the forward flow direction.
4. The apparatus of claim 3, wherein the oxidizer mixer (22) is a hollow cylindrical housing, the inner diameter of the middle is smaller than the outer diameters of the two ends, and the housing is sleeved on the outer surface of the throat cavity (23) to form an annular oxidizer mixing chamber (4), the oxidizer mixing chamber (4) is connected with the throat cavity (23) through inclined oxidizer nozzles (21), and the inclined direction of the oxidizer nozzles (21) is the forward flow direction.
5. The flowing corrosion-salt deposition apparatus for supercritical water oxidation reaction coupling according to claim 1 or 4, wherein the taper angle of the tapered cavity (18) is larger than the divergent angle of the divergent cavity (24), and the length of the throat cavity (23) is larger than the lengths of the tapered cavity (18) and the divergent cavity (24).
6. The flowing corrosion-salt deposition device for supercritical water oxidation reaction coupling according to claim 1, wherein the inner lining (12) is a detachable and replaceable structure, the inner wall of the test pipe section (11) is provided with 2-4 elongated slots, the inner lining (12) tightly attached to the inside of the test pipe section is provided with the same number of elongated ribs, and the elongated slots on the test pipe section (11) are precisely matched with the elongated ribs on the inner lining (12).
7. The flowing corrosion-salt deposition device for supercritical water oxidation reaction coupling according to claim 1, characterized in that the electric heater (9) and the cooling water jacket (13) are both located outside the test pipe section (11), and the tail end of the inner bushing (12) is located at the rear of the tail end of the cooling water jacket (13); the thermocouple II (10) and the pressure taking port II (N5) are positioned between the electric heater (9) and the cooling water jacket (13) and are close to the tail end of the electric heater (9); the cooling water inlet (N2) is positioned at the top of the tail end of the cooling water jacket (13), and the cooling water outlet (N6) is positioned at the bottom of the front end of the cooling water jacket (13).
8. The flowing corrosion-salt deposition apparatus for supercritical water oxidation reaction coupling of claim 1, the test pipe is characterized in that a first high-pressure flange (7) is arranged at the tail end of the outside of the main pipe section, a second high-pressure flange (8) is arranged at the front end of the outside of the test pipe section (11), a third high-pressure flange (14) is arranged at the rear end of the outside, a fourth high-pressure flange (15) is arranged at the front end of the outside of the connecting pipeline (27), the main pipe section is connected with the test pipe section (11) through a first fastening bolt (6), the first high-pressure flange (7) and the second high-pressure flange (8), a first sealing washer (25) is filled on the contact surface of the main pipe section and the test pipe section (11), the test pipe section (11) is connected with the connecting pipeline (27) through the third high-pressure flange (14), the fourth high-pressure flange (15) and a second fastening bolt (16), and a second sealing washer (26) is filled on the contact surface of the test pipe section (11) and the connecting pipeline (27).
9. The flowing corrosion-salt deposition apparatus for supercritical water oxidation reaction coupling according to claim 1, wherein the testing ends of the thermocouple one (5), the thermocouple two (10) and the thermocouple three (17) are all located near the wall surface of the corresponding pipeline, and the pressure taking port one (N4), the pressure taking port two (N5) and the pressure taking port three (N7) are respectively arranged opposite to the thermocouple one (5), the thermocouple two (10) and the thermocouple three (17).
10. The flowing corrosion-salt deposition device for coupling supercritical water oxidation reaction of claim 1, wherein the thermocouple III (17) and the pressure taking port III (N7) are located at the front section of the connecting pipe (27) near the cooling water jacket (13).
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