CN103438667A - Three-stage back heating multi-strand winding pipe type heat exchange device for low-temperature liquid nitrogen - Google Patents
Three-stage back heating multi-strand winding pipe type heat exchange device for low-temperature liquid nitrogen Download PDFInfo
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- CN103438667A CN103438667A CN2013103581187A CN201310358118A CN103438667A CN 103438667 A CN103438667 A CN 103438667A CN 2013103581187 A CN2013103581187 A CN 2013103581187A CN 201310358118 A CN201310358118 A CN 201310358118A CN 103438667 A CN103438667 A CN 103438667A
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Abstract
The invention mainly relates to the technical field of synthesis ammonia and low-temperature liquid nitrogen, and relates to the technology of a three-stage back heating multi-strand winding pipe type heat exchange device for the low-temperature liquid nitrogen. Through N2-H2 synthesis gas synthesized by H2 at the temperature of 191.5 DEG C below zero and the pressure of 1.8MPa and N2 at the temperature of 193.4 DEG C below zero and the pressure of 5.19MPa, through waste nitrogen N2-Ar-CO-CH4 at the temperature of 191.5 DEG C below zero and the pressure of 0.18MPa and through compensated high pressure LN2, N2 at the temperature of 127.2 DEG C below zero and the pressure of 5.7MPa is cooled to be N2 at the temperature of 188 DEG C below zero and the pressure of 5.6MPa, and purified gas H2-N2-CO-Ar-CH4 washed by low-temperature methanol is cooled to be purified gas at the temperature of 188.2 DEG C below zero and the pressure of 5.21MPa, namely, the incoming high-pressure N2 and the purified gas washed by the low-temperature methanol are cooled through cooling capacity back heating of the washed N2-H2 synthesis gas, high-pressure H2 and the waste nitrogen, and the temperature condition for washing the purified gas through the low-temperature liquid nitrogen is provided for a washing tower. The three-stage back heating multi-strand winding pipe type heat exchange device for the low-temperature liquid nitrogen is compact in structure and high in heat exchange efficiency and can be used for solving the technical problems of the three-stage six-strand four-bundle winding pipe type heat exchange for the low-temperature liquid nitrogen with the temperature ranging from 127.2 DEG C below zero to 193.4 DEG C below zero, and the low-temperature heat exchange efficiency of a low-temperature liquid nitrogen process system is improved.
Description
Technical field
The present invention is mainly used in synthetic ammonia low-temperature liquid nitrogen process equipment technical field, relates to three grade of six plume, four tube bank spiral winding pipe type heat exchange equipment technologies for low temperature liquid nitrogen ,-191.5 ℃, 1.8MPa H that in application of cold temperature liquid nitrogen technique, gas-liquid separator separates goes out
2, scrubber overhead-193.4 ℃, 5.19MPa N flowing out
2-H
2-191.5 ℃, 0.18MPa N that synthesis gas and scrubber overhead flow out
2-A
r-CO-CH
4dirty nitrogen, supplementary high pressure LN
2cooling-127.2 ℃, 5.7MPa N
2to-188 ℃, 5.6MPa LN
2and the cooling H from low-temp methanol technique
2-N
2-CO-A
r-CH
4purified gas, to-188.2 ℃, 5.21MPa, is applied the N after washing
2-H
2synthesis gas, high pressure H
2and the cooling incoming flow high pressure of the cold backheat N of dirty nitrogen
2, the purified gas after low-temperature rectisol, the temperature conditions of low temperature liquid nitrogen washing, purifying gas is provided to scrubbing tower; Its compact conformation, heat exchange efficiency is high, can be used for-127.2 ℃～-193.4 ℃ gas band phase transformation low-temperature heat exchange fields, solves a low temperature liquid nitrogen three tier structure refrigeration technique difficult problem, improves the low-temperature heat exchange efficiency of low temperature liquid nitrogen process system.
Background technology
Main heat exchange equipment in the synthetic ammonia low-temperature liquid nitrogen wash process is the multiple flow spiral winding tube type heat exchanger, the main heat exchange technological process mainly comprises three phases, mainly the heat exchanger by three various heat exchange warm areas forms, wherein, first stage is that the high pressure nitrogen after compression is carried out to precooling, be about to 42 ℃ of high pressure nitrogens and be chilled in advance-63.6 ℃, second stage is that high pressure nitrogen is cooled to-127.2 ℃ from-63.6 ℃, for low-temperature liquefaction is prepared, three phases is cooled to-188 ℃ by-127.2 ℃ of high pressure nitrogens and also liquefies and come-127.2 ℃ of purified gas to be cooled to-188.2 ℃ low-temp methanol technique, three processes can adopt various heat exchange equipment.At present, low temperature liquid nitrogen is washed process system and is adopted the overall heat exchange mode mostly, and three sections process of refrigerastions are connected to an integral body, and the heat exchanger height can reach 60～80 meters, heat exchange efficiency is improved significantly, but it is too complicated that the problem existed is the heat-exchanging process flow process, and the heat transmission equipment volume is too huge, bring serious inconvenience to processing and manufacturing, on-the-spot installation and transportation, once and the problems such as pipe leakage occur, be difficult to detect, be easy to cause whole heat exchanger to scrap, the set technique equipment stops production.In addition, because common tubular heat exchanger adopts tube sheet, connect the bundle of parallel tubes mode, simple in structure, the self-constriction ability is poor, is generally the heat exchange of sub-thread stream, and heat exchange efficiency is lower, and volume is larger, and the temperature difference is less, is difficult to high pressure N
2cooling and liquefaction in a flow process.In addition; due to the heat exchange warm area between-127.2 ℃～-188 ℃; traditional expanded material heat-insulation layer is difficult to prevent the cold transmission; leak heat serious; cause high pressure nitrogen to liquefy, the problem such as the reflux fluid temperature is too high, and the present invention adopts the vacuum multi-layer insulation technology; be wound around the tubular type heat exchange characteristic in conjunction with multiple flow, can guarantee heat transfer process loss of refrigeration capacity minimum.Finally, the method of traditional supplementary liquid nitrogen is that the liquid nitrogen that nitrogen gas generating system is produced directly injects the whole reflux temperature of dirty nitrogen reduction under the 0.18MPa saturation state, accelerate to start the diffusion process of refrigerastion, but the nitrogen after vaporization enters atmosphere after the burning of discharge system together with dirty nitrogen, cause the nitrogen waste.The present invention adopts 5.9MPa high pressure overfreezing liquid nitrogen directly to squeeze into the reverse cooling winding tube bank of housing, after gasification, with the shell side high pressure nitrogen, mix, can directly play and accelerate the liquefaction of gas nitrogen, promote diffusion process of refrigerastion in scrubbing tower, supplementary liquid nitrogen also can effectively be applied to this journey of proportioning of synthetic ammonia gas, throttling the use amount of nitrogen.The present invention washes technology features and LN according to low temperature liquid nitrogen
2three grade low-temp liquefaction characteristics, adopt three sections separately independently spiral winding tube type heat exchanger as main heat transmission equipment, the segmentation independent cooling, emphasis is for the third level six plume four tube bank type spiral winding pipe type heat exchange refrigeration process flow processs, third level refrigeration process technology and the winding pipe type heat transfer equipment of research and development warm area between-127.2 ℃～-188 ℃, solve third level high pressure N
2the liquefaction of low temperature backheat and purified gas precooling Key technique problem, i.e. LN
2three grade of six plume of low-temperature liquefaction, four tube bank spiral winding pipe type heat exchange equipment configuration and technological process problems.
Summary of the invention
The present invention is mainly for three grades of-127.2 ℃～-188 ℃ low-temperature liquefaction problems of high pressure nitrogen, employing has six plumes four that volume is little, heat exchange efficiency is high, heat transfer temperature difference is large, have self-tightening contraction adjustment function and restrains spiral winding tube type heat exchangers as main heat exchange equipment, applies-191.5 ℃, 1.8MPa H
2,-193.4 ℃, 5.19MPa N
2-H
2mist and-191.5 ℃, 0.18MPa N
2-A
r-CO-CH
4the technological process of mist backheat refrigeration, control the freezing by change of state flow process, and then control high pressure nitrogen and purified gas precooling temperature and pressure, improve heat exchange efficiency, solve high pressure nitrogen three liquefaction of grade low-temp backheat and purified gas precooling problems, for the low temperature liquid nitrogen washing provides the cryogen condition.
Technical solution of the present invention:
Low temperature liquid nitrogen is wound around the pipe type heat transfer equipment with three grades of backheat multiple flows, comprises three grades of high pressure N
2entrance sleeve (1), three grades of external pressure upper covers (2), three grades of dirty nitrogen outlet tube sheets (3), three grades of dirty nitrogen outlet bobbin carriages (4), three grades of dirty nitrogen discharge connections (5), three grades of dirty nitrogen outlet(discharge) flanges (6), three grades of dirty nitrogen are wound around tube bank (7), three grades of purified gas suction flanges (8), three grades of purified gas entrance sleeves (9), three grades of purified gas import bobbin carriages (10), three grades of purified gas import tube sheets (11), three grades of purified gas are wound around tube bank (12), three grades of an internal pressured cylinders (13), three grades of cylindrical shell vacuum multilayer insulation layers (14), three grades of external pressure cylindrical shells (15), three grades of lower support circles (16), three grades of clean gas outlet tube sheets (17), three grades of clean gas outlet bobbin carriages (18), three grades of clean gas outlet flanges (19), three grades of clean gas outlets are taken over (20), three grades of dirty nitrogen inlet flanges (21), three grades of dirty nitrogen inlets are taken over (22), three grades of dirty nitrogen inlet bobbin carriages (23), three grades of dirty nitrogen inlet tube sheets (24), three grades of supplementary LN
2suction flange (25), three grades of supplementary LN
2entrance sleeve (26), three grades of external pressure low heads (27), three grades of high pressure LN
2discharge connection (28), three grades of high pressure LN
2depress end socket (33), three grades of supplementary liquid nitrogen spraying pipes (34), three grades of N in outlet(discharge) flange (29), three grades of skirts (30), three grades of low head vacuum multilayer insulation layers (31), three grades of vacuum adapters (32), three grades
2-H
2synthesis gas import tube sheet (35), three grades of N
2-H
2synthesis gas import bobbin carriage (36), three grades of N
2-H
2synthesis gas entrance sleeve (37), three grades of N
2-H
2synthesis gas suction flange (38), three grades of H
2import bobbin carriage (39), three grades of H
2suction flange (40), three grades of H
2entrance sleeve (41),Three grades of H
2Import tube sheet (42), three grades of dividing plates (43), tertiary centre cylinder (44), spiral coil (45), three grades of upper support circles (46), three grades of H
2Be wound around tube bank (47), three grades of H
2Outlet tube sheet (48), three grades of H
2Outlet bobbin carriage (49), three grades of H
2Discharge connection (50), three grades of H
2Outlet(discharge) flange (51), three grades of N
2-H
2Synthesis gas is wound around tube bank (52), three grades of N
2-H
2Syngas outlet flange (53), three grades of N
2-H
2Syngas outlet is taken over (54), three grades of N
2-H
2Syngas outlet bobbin carriage (55), three grades of N
2-H
2Press end socket (58), three grades of high pressure N in syngas outlet tube sheet (56), three grades of upper cover vacuum multilayer insulation layers (57), three grades
2Suction flange (59) is characterized in that: three grades of dirty nitrogen are wound around tube bank (7), three grades of N
2-H
2Synthesis gas is wound around tube bank (52), three grades of purified gas are wound around tube bank (12), three grades of H
2Be wound around tube bank (47), be wound around around tertiary centre cylinder (44), the spiral coil after winding (45) is installed in three grades of an internal pressured cylinders (13); Tertiary centre cylinder (44) one ends are installed three grades of upper support circles (46), one end is installed three grades of lower support circles (16), three grades of upper support circles (46) are fixed in three grades of an internal pressured cylinders (13) top, three grades of lower support circles (16) are fixed in three grades of an internal pressured cylinders (13) bottom, and three grades of dirty nitrogen are wound around tube bank (7), three grades of N
2-H
2Synthesis gas is wound around tube bank (52), three grades of purified gas are wound around tube bank (12), three grades of H
2Being wound around tube bank (47) is wound between three grades of upper support circles (46) and three grades of lower support circles (16); Three grades of an internal pressured cylinders (13) top with press end socket (58) in three grades and be connected, press end socket (58) top in three grades three grades of high pressure N are installed
2Entrance sleeve (1) and three grades of high pressure N
2Suction flange (59); Three grades of an internal pressured cylinders (13) bottom with depress end socket (33) in three grades and be connected, depress end socket (33) top in three grades three grades of high pressure LN are installed
2Discharge connection (28) and three grades of high pressure LN
2Outlet(discharge) flange (29); Three grades of an internal pressured cylinders (13) upper left-hand is installed three grades of purified gas import tube sheets (11), three grades of purified gas import tube sheets (11) left side connects three grades of purified gas import bobbin carriages (10), and three grades of purified gas import bobbin carriages (10) top connects three grades of purified gas entrance sleeves (9) and three grades of purified gas suction flanges (8); Three grades of an internal pressured cylinders (13) upper left-hand is installed three grades of dirty nitrogen outlet tube sheets (3), three grades of dirty nitrogen outlet tube sheets (3) left side connects three grades of dirty nitrogen outlet bobbin carriages (4), and three grades of dirty nitrogen outlet bobbin carriage (4) tops connect three grades of dirty nitrogen discharge connections (5) and three grades of dirty nitrogen outlet(discharge) flanges (6); Three grades of an internal pressured cylinders (13) upper right is installed three grades of H
2Outlet tube sheet (48), three grades of H
2Outlet tube sheet (48) right side connects three grades of H
2Outlet bobbin carriage (49), three grades of H
2Outlet bobbin carriage (49) top connects three grades of H
2Discharge connection (50) and three grades of H
2Outlet(discharge) flange (51); Three grades of an internal pressured cylinders (13) upper right is installed three grades of N
2-H
2Syngas outlet tube sheet (56), three grades of N
2-H
2Syngas outlet tube sheet (56) right side connects three grades of N
2-H
2Syngas outlet bobbin carriage (55), three grades of N
2-H
2Syngas outlet bobbin carriage (55) top connects three grades of N
2-H
2Syngas outlet is taken over (54) and three grades of N
2-H
2Syngas outlet flange (53); Three grades of an internal pressured cylinders (13) lower left side is installed three grades of clean gas outlet tube sheets (17), three grades of clean gas outlet tube sheets (17) left side connects three grades of clean gas outlet bobbin carriages (18), and three grades of clean gas outlet bobbin carriages (18) top connects three grades of clean gas outlets and takes over (20) and three grades of purified gas suction flanges (19); Three grades of an internal pressured cylinders (13) lower left side is installed three grades of dirty nitrogen inlet tube sheets (24), three grades of dirty nitrogen inlet tube sheets (24) left side connects three grades of dirty nitrogen inlet bobbin carriages (23), and three grades of dirty nitrogen inlet bobbin carriages (23) top connects three grades of dirty nitrogen inlets and takes over (22) and three grades of dirty nitrogen inlet flanges (21); Three grades of H are installed on three grades of an internal pressured cylinders (13) right side, bottom
2Import tube sheet (42), three grades of H
2Import tube sheet (42) right side connects three grades of H
2Import bobbin carriage (39), three grades of H
2Import bobbin carriage (39) top connects three grades of H
2Entrance sleeve (41) and three grades of H
2Suction flange (40); Three grades of N are installed on three grades of an internal pressured cylinders (13) right side, bottom
2-H
2Synthesis gas import tube sheet (35), three grades of N
2-H
2Synthesis gas import tube sheet (35) right side connects three grades of N
2-H
2Synthesis gas import bobbin carriage (36), three grades of N
2-H
2Synthesis gas import bobbin carriage (36) top connects three grades of N
2-H
2synthesis gas entrance sleeve (37) and three grades of N
2-H
2synthesis gas suction flange (38), three grades of supplementary LN are installed in the middle of three grades of an internal pressured cylinders (13) bottom
2suction flange (25) and three grades of supplementary LN
2entrance sleeve (26), three grades of supplementary LN
2entrance sleeve (26) connects three grades of supplementary liquid nitrogen spraying pipes (34), and three grades of supplementary liquid nitrogen spraying pipes (34) are installed under tertiary centre cylinder (44), three grades of an internal pressured cylinders (13), press end socket (58) in three grades, depress end socket (33) outer surface three grades of cylindrical shell vacuum multilayer insulation layers (14) that alternately parcel consists of multilayer heat insulation paper and laminated aluminium foil respectively in three grades, three grades of upper cover vacuum multilayer insulation layers (57), three grades of low head vacuum multilayer insulation layers (31), three grades of cylindrical shell vacuum multilayer insulation layers (14), three grades of upper cover vacuum multilayer insulation layers (57), three grades of low head vacuum multilayer insulation layers (31) outside is respectively three grades of external pressure cylindrical shells (15), three grades of external pressure upper covers (2), three grades of external pressure low heads (27), three grades of external pressure cylindrical shells (15) top penetrates installs three grades of dirty nitrogen outlet bobbin carriages (4), three grades of purified gas import bobbin carriages (10), three grades of N
2-H
2syngas outlet bobbin carriage (55), three grades of H
2outlet bobbin carriage (49), bottom penetrates installs three grades of clean gas outlet bobbin carriages (18), three grades of dirty nitrogen inlet bobbin carriages (23), three grades of H
2import bobbin carriage (39), three grades of N
2-H
2synthesis gas import bobbin carriage (36), three grades of external pressure upper covers (2) middle part penetrates installs three grades of high pressure N
2entrance sleeve (1), three grades of skirts (30) and three grades of vacuum adapters (32) are installed in three grades of external pressure low heads (27) bottom, and middle part penetrates installs three grades of high pressure LN
2discharge connection (28).
H
2-191.5 ℃, enter three grades of H during 1.8MPa
2import bobbin carriage (39), at three grades of H
2be allocated in three grades of H in import bobbin carriage (39)
2be wound around tube bank (47) each arm, three grades of H
2be wound around tube bank (47) after spiral winding in three grades of an internal pressured cylinders (13) by from three grades of high pressure N
2the shell side high pressure N of entrance sleeve (1)
2heating, temperature is increased to-130.2 ℃, pressure decreased to 1.78MPa, then flow to three grades of H
2outlet bobbin carriage (49), then through three grades of H
2discharge connection (50) flows out into the two-stage system device for cooling.
N
2-H
2synthesis gas-193.4 ℃, enter three grades of N during 5.19MPa
2-H
2synthesis gas import bobbin carriage (36), at three grades of N
2-H
2be allocated in three grades of N in synthesis gas import bobbin carriage (36)
2-H
2synthesis gas is wound around tube bank (52) each arm, three grades of N
2-H
2synthesis gas be wound around tube bank (52) after spiral winding in three grades of an internal pressured cylinders (13) by from three grades of high pressure N
2the shell side high pressure N of entrance sleeve (1)
2heating, temperature is increased to-130.2 ℃, pressure decreased to 5.14MPa, then flow to three grades of N
2-H
2syngas outlet bobbin carriage (55), then through three grades of N
2-H
2syngas outlet is taken over (54) and is flowed out into the two-stage system device for cooling.
N
2-A
r-CO-CH
4dirty nitrogen-191.5 ℃, enter three grades of dirty nitrogen inlet bobbin carriages (23) during 0.18MPa, be allocated in three grades of dirty nitrogen and be wound around tube bank (7) each arms in three grades of dirty nitrogen inlet bobbin carriage (23), three grades of dirty nitrogen be wound around tube bank (7) after spiral winding in three grades of an internal pressured cylinders (13) by from three grades of high pressure N
2the shell side high pressure N of entrance sleeve (1)
2heating, temperature is increased to-130.2 ℃, pressure decreased to 0.15MPa, then flow to three grades of dirty nitrogen outlet bobbin carriages (4), then flows out into the two-stage system device for cooling through three grades of dirty nitrogen discharge connections (5).
H
2-N
2-CO-A
r-CH
4purified gas-127.2 ℃, enter three grades of purified gas import bobbin carriages (10) during 5.24MPa, be allocated in three grades of purified gas and be wound around tube bank (12) each arms in three grades of purified gas import bobbin carriage (10), three grades of purified gas be wound around tube bank (12) after spiral winding three grades of an internal pressured cylinders (13) in quilt-191.5 ℃, 1.8MPa H
2,-193.4 ℃, 5.19MPa N
2-H
2synthesis gas and-191.5 ℃, 0.18MPa N
2-A
r-CO-CH
4dirty nitrogen is cooled to-188.2 ℃, 5.21MPa, then flow to three grades of clean gas outlet bobbin carriages (18), then flows out into scrubbing tower through three grades of clean gas outlets adapters (20).
High pressure N
2-127.2 ℃, during 5.7MPa through three grades of high pressure N
2entrance sleeve (1) enters housing, by three grades of dirty nitrogen, is wound around dirty nitrogen, three grades of N in tube bank (7)
2-H
2synthesis gas is wound around tube bank (52) interior synthesis gas, three grades of H
2be wound around tube bank (47) interior hydrogen_cooling to-188 ℃, 5.6MPa LN
2, through three grades of high pressure LN
2discharge connection (28) flows out into scrubbing tower.
Supplemented cold LN
2-193.4 ℃, during 5.9MPa through three grades of supplementary LN
2entrance sleeve (26) enters lower housing portion, and the cooling three grades of dirty nitrogen of upward spraying are wound around tube bank (7), three grades of N
2-H
2synthesis gas is wound around tube bank (52), three grades of H
2be wound around tube bank (47), three grades of purified gas are wound around tube bank (12), then with housing inner high voltage N
2mixing is by three grades of high pressure LN
2discharge connection (28) flows out into scrubbing tower.
The Principle Problems that scheme is related:
At first, traditional low temperature LN
2liquefaction system adopts plate-fin overall heat exchange mode more, and heat exchange efficiency is than tandem type LN
2liquefaction system is significantly improved, and heat exchanger quantity is reduced, and whole LNG Lquified Process Flow is simplified, and the refrigeration system of independent operating reduces, convenient management, but the problem existed is LNG Lquified Process Flow simplify after, make LN
2main heat exchanger is bulky, the heat-exchanging process complexity, and processing and manufacturing, on-the-spot install and transport difficulty increases, once and the problem such as leakages occurs, be difficult to detect, easily cause whole heat exchanger to scrap, the stopping production of set technique equipment.For addressing this problem, the present invention is divided into 42 ℃～-63.6 ℃ ,-63.6 ℃～-127.2 ℃ by main heat exchanger inner high voltage nitrogen temperature change procedure,-127.2 ℃～-188.2 ℃ three ranks, adopt three independently heat exchangers, complete three temperature ranges heat transfer process from high to low, the primary study exploitation third level-127.2 ℃～-188.2 ℃ of low-temperature heat exchange flow processs and third level heat exchanger general structures and import and export parameter, and adopt three plume backheat refrigeration process, solve third level refrigeration heat transmission equipment problem.Research process is relatively independent, can be connected to become integral body with rear front two-stage, consistent with integrated main heat exchanger heat exchange principle after connecting, and is convenient to transport and install after the main heat exchanger partition.Secondly, adopt and supplement precooling LN
2technique before system boot, is supplemented startup LN in the three tier structure cooling heat-exchanger
2, temperature of incoming flow and backheat temperature are all reduced gradually, incoming flow high pressure N
2and, after the reduction of purified gas temperature, at the scrubbing tower inner high voltage, mix, producing the molecular diffusion refrigeration effect, temperature reduces, and reaches refrigeration.After supplementing cooled with liquid nitrogen, after incoming flow gas and mixing, anti-gas temperature reduces gradually, simultaneously, and scrubbing tower inner high voltage N
2with generation molecular diffusion refrigeration effect after incoming flow purified gas high pressure mixing, make incoming flow high pressure N
2with circulating, not section is liquefied gradually.LN after liquefaction
2after entering scrubbing tower, but washing, purifying gas gaseous mixture H
2-N
2-CO-Ar-CH
4in foreign gas N
2, CO, Ar, CH
4deng, make above gas all be dissolved in LN
2after, LN
2become dirty nitrogen.Dirty nitrogen flows out after scrubbing tower through gas-liquid separator separates for not containing H again
2dirty nitrogen and high pressure H
2, not containing H
2dirty nitrogen and high pressure H
2reflux again into the standby cooling incoming flow high pressure of the backheat N of three tier structure cold charge
2and purified gas.In scrubbing tower not by LN
2h in the purified gas absorbed
2with LN
2n after middle vaporization
2flow to again the standby cooling incoming flow purified gas of backheat and the high pressure N of carrying out of three tier structure cold charge after discharging by the scrubbing tower tower top while approaching 3:1
2.Three fluid streams that reflux are after continuous circulation, finally by incoming flow high pressure N
2liquefy and the purified gas temperature of incoming flow is reduced to-188.2 ℃ of wash temperatures, then the LN after application liquefaction
2impurity composition in washing, purifying gas also continues circulation, now, stops gradually supplementing the high pressure overfreezing liquid nitrogen, and system reaches diffusion refrigeration poised state, does not need to add extra cold-producing medium again, and the backflow precooling process enters continual and steady state.The cold totally six plume heat exchange of three tier structure and palpus adopt four tube banks to be wound around the pipe type heat transfers equipment carry out the heat exchange of low temperature backheat, three strands of backheat cold flows and two strands of incoming flows of one supplementary cooled with liquid nitrogen and liquefaction wherein one, one of liquefaction foreign gas that light washing is not liquefied in one again, form again new three bursts of backheat cold flow backheats heat exchange after washing, complete whole backheat precooling process.Traditional tubular heat exchanger is owing to having adopted two large tubesheets to connect the bundle of parallel tubes structure, volume is larger, heat transfer temperature difference is less, easy subregion, tube pitch is larger, and the self-constriction ability is poor, generally be applicable to single tube Shu Huanre, heat exchange efficiency is lower, is difficult to carry out the multiple flow heat transfer process, has been difficult for six plume uniform heat exchange processes.The present invention has developed and can bear 5.9MPa, aluminium alloy 6005 tube bank of-197 ℃ and the low temperature liquid nitrogen of 9Ni steel sheel and equip with heat exchange, can complete six plumes four tube banks under the high pressure low temperature operating mode and be wound around the tubular type heat transfer process.
Technical characterstic of the present invention:
The present invention is wound around the pipe type heat transfer equipment mainly for low temperature liquid nitrogen with three grades of backheat multiple flows, employing has the six plumes four tube bank spiral winding pipe type heat exchange equipments that volume is little, heat exchange efficiency is high, heat transfer temperature difference is large, have self-tightening contraction adjustment function, and in the application of cold temperature liquid nitrogen wash process, gas-liquid separator separates goes out-191.5 ℃, 1.8MPa H
2,-193.4 ℃, 5.19MPa N
2-H
2synthesis gas and-191.5 ℃, 0.18MPa N
2-A
r-CO-CH
4dirty nitrogen, supplementary high pressure LN
2cooling-127.2 ℃, 5.7MPa N
2to-188 ℃, 5.6MPa LN
2and the cooling H from low-temp methanol technique
2-N
2-CO-A
r-CH
4purified gas, to-188.2 ℃, 5.21MPa, reaches the N after application is washed
2-H
2the cooling incoming flow high pressure of the cold backheat N of synthesis gas, hydrogen and dirty nitrogen
2, the purified gas after low-temperature rectisol, the temperature conditions of low temperature liquid nitrogen washing low temperature purification gas is provided to scrubbing tower; Its compact conformation, heat exchange efficiency is high, can be used for-127.2 ℃～193.4 ℃ gas band phase transformation low-temperature heat exchange fields, solves low temperature liquid nitrogen and washes a three tier structure refrigeration technique difficult problem, improves the low-temperature heat exchange efficiency that low temperature liquid nitrogen is washed process system.In addition, adopt the vacuum multi-layer insulation technology to be wound around the tubular type heat transfer process in conjunction with multiple flow, can guarantee heat transfer process loss of refrigeration capacity minimum; Adopt 5.9MPa high pressure overfreezing liquid nitrogen directly to squeeze into the reverse cooling winding tube bank of housing, after gasification, with the shell side high pressure nitrogen, mix, can directly play and accelerate the liquefaction of gas nitrogen, promote diffusion process of refrigerastion in scrubbing tower, supplementary liquid nitrogen also can effectively be applied to this journey of proportioning of synthetic ammonia gas, saves the nitrogen use amount.Low temperature liquid nitrogen is wound around the pipe type heat transfer equipment with three grades of backheat multiple flows and has compact conformation, medium band phase-change heat transfer, and heat transfer coefficient is large, can solve large-scale LN
2the three backheat precoolings of low-temperature liquefaction process mesohigh nitrogen, high pressure nitrogen low-temperature liquefaction technical barrier, improve system heat exchange and liquefaction efficiency; Apply three grades of LN
2after the low-temperature liquefaction process, LN
2main heat exchanger can be divided into three independently heat exchangers, and volume reduces, and sectional carries out processing and manufacturing, transportation and on-the-spot the installation, once the problem such as pipe leakage occur, is easy to detect, and is difficult for causing whole heat exchanger to scrap and the set technique equipment stops production; LN
2but the thermic load of three grade of six plume of low-temperature liquefaction, four tube bank spiral winding pipe type heat exchange equipment reasonable distribution liquefaction stages and super cooled sect, can be in conjunction with load distribution and the heat exchanger tube strength characteristics of large heat exchanger, the mode of employing sectional center cylinder winding screw coil pipe, guarantee winding process evenly theoretically and intensity meets designing requirement; Choose reasonable the method for heat exchanger inlet and outlet position and material, a plurality of tubule plate of employing side can make heat exchanger structure compacter, heat transfer process is optimized; The outer medium counter flow of spiral winding tube type heat exchanger pipe lateral cross are skimmed over winding pipe, and heat exchanger is the heat exchanger tube reverse-winding between layers, even Reynolds number is lower, it is still the turbulent flow form, and the coefficient of heat transfer is larger; Owing to being medium band phase-change heat-exchange process, less to the pressure reduction between different medium and temperature difference requirement for restriction, the process units operation easier reduces, and security is improved; But spiral winding tube type heat exchanger is high pressure resistant and the sealing reliable, the thermal expansion automatic compensating, easily realizes large-scale N
2the low-temperature liquefaction operation.
The accompanying drawing explanation
Figure 1 shows that low temperature liquid nitrogen is wound around critical piece structure and the position relationship of pipe type heat transfer equipment with three grades of backheat multiple flows.
The specific embodiment
The processing and manufacturing low temperature liquid nitrogen is wound around the pipe type heat transfer equipment with three grades of backheat multiple flows, comprises three grades of high pressure N
2entrance sleeve (1), three grades of external pressure upper covers (2), three grades of dirty nitrogen outlet tube sheets (3), three grades of dirty nitrogen outlet bobbin carriages (4), three grades of dirty nitrogen discharge connections (5), three grades of dirty nitrogen outlet(discharge) flanges (6), three grades of dirty nitrogen are wound around tube bank (7), three grades of purified gas suction flanges (8), three grades of purified gas entrance sleeves (9), three grades of purified gas import bobbin carriages (10), three grades of purified gas import tube sheets (11), three grades of purified gas are wound around tube bank (12), three grades of an internal pressured cylinders (13), three grades of cylindrical shell vacuum multilayer insulation layers (14), three grades of external pressure cylindrical shells (15), three grades of lower support circles (16), three grades of clean gas outlet tube sheets (17), three grades of clean gas outlet bobbin carriages (18), three grades of clean gas outlet flanges (19), three grades of clean gas outlets are taken over (20), three grades of dirty nitrogen inlet flanges (21), three grades of dirty nitrogen inlets are taken over (22), three grades of dirty nitrogen inlet bobbin carriages (23), three grades of dirty nitrogen inlet tube sheets (24), three grades of supplementary LN
2suction flange (25), three grades of supplementary LN
2entrance sleeve (26), three grades of external pressure low heads (27), three grades of high pressure LN
2discharge connection (28), three grades of high pressure LN
2depress end socket (33), three grades of supplementary liquid nitrogen spraying pipes (34), three grades of N in outlet(discharge) flange (29), three grades of skirts (30), three grades of low head vacuum multilayer insulation layers (31), three grades of vacuum adapters (32), three grades
2-H
2synthesis gas import tube sheet (35), three grades of N
2-H
2synthesis gas import bobbin carriage (36), three grades of N
2-H
2synthesis gas entrance sleeve (37), three grades of N
2-H
2synthesis gas suction flange (38), three grades of H
2import bobbin carriage (39), three grades of H
2suction flange (40), three grades of H
2entrance sleeve (41),Three grades of H
2Import tube sheet (42), three grades of dividing plates (43), tertiary centre cylinder (44), spiral coil (45), three grades of upper support circles (46), three grades of H
2Be wound around tube bank (47), three grades of H
2Outlet tube sheet (48), three grades of H
2Outlet bobbin carriage (49), three grades of H
2Discharge connection (50), three grades of H
2Outlet(discharge) flange (51), three grades of N
2-H
2Synthesis gas is wound around tube bank (52), three grades of N
2-H
2Syngas outlet flange (53), three grades of N
2-H
2Syngas outlet is taken over (54), three grades of N
2-H
2Syngas outlet bobbin carriage (55), three grades of N
2-H
2Press end socket (58), three grades of high pressure N in syngas outlet tube sheet (56), three grades of upper cover vacuum multilayer insulation layers (57), three grades
2The parts such as suction flange (59), and meet following essential characteristic: three grades of dirty nitrogen are wound around tube bank (7), three grades of N
2-H
2Synthesis gas is wound around tube bank (52), three grades of purified gas are wound around tube bank (12), three grades of H
2Be wound around tube bank (47), be wound around around tertiary centre cylinder (44), the spiral coil after winding (45) is installed in three grades of an internal pressured cylinders (13); Tertiary centre cylinder (44) one ends are installed three grades of upper support circles (46), one end is installed three grades of lower support circles (16), three grades of upper support circles (46) are fixed in three grades of an internal pressured cylinders (13) top, three grades of lower support circles (16) are fixed in three grades of an internal pressured cylinders (13) bottom, and three grades of dirty nitrogen are wound around tube bank (7), three grades of N
2-H
2Synthesis gas is wound around tube bank (52), three grades of purified gas are wound around tube bank (12), three grades of H
2Being wound around tube bank (47) is wound between three grades of upper support circles (46) and three grades of lower support circles (16); Three grades of an internal pressured cylinders (13) top with press end socket (58) in three grades and be connected, press end socket (58) top in three grades three grades of high pressure N are installed
2Entrance sleeve (1) and three grades of high pressure N
2Suction flange (59); Three grades of an internal pressured cylinders (13) bottom with depress end socket (33) in three grades and be connected, depress end socket (33) top in three grades three grades of high pressure LN are installed
2Discharge connection (28) and three grades of high pressure LN
2Outlet(discharge) flange (29); Three grades of an internal pressured cylinders (13) upper left-hand is installed three grades of purified gas import tube sheets (11), three grades of purified gas import tube sheets (11) left side connects three grades of purified gas import bobbin carriages (10), and three grades of purified gas import bobbin carriages (10) top connects three grades of purified gas entrance sleeves (9) and three grades of purified gas suction flanges (8); Three grades of an internal pressured cylinders (13) upper left-hand is installed three grades of dirty nitrogen outlet tube sheets (3), three grades of dirty nitrogen outlet tube sheets (3) left side connects three grades of dirty nitrogen outlet bobbin carriages (4), and three grades of dirty nitrogen outlet bobbin carriage (4) tops connect three grades of dirty nitrogen discharge connections (5) and three grades of dirty nitrogen outlet(discharge) flanges (6); Three grades of an internal pressured cylinders (13) upper right is installed three grades of H
2Outlet tube sheet (48), three grades of H
2Outlet tube sheet (48) right side connects three grades of H
2Outlet bobbin carriage (49), three grades of H
2Outlet bobbin carriage (49) top connects three grades of H
2Discharge connection (50) and three grades of H
2Outlet(discharge) flange (51); Three grades of an internal pressured cylinders (13) upper right is installed three grades of N
2-H
2Syngas outlet tube sheet (56), three grades of N
2-H
2Syngas outlet tube sheet (56) right side connects three grades of N
2-H
2Syngas outlet bobbin carriage (55), three grades of N
2-H
2Syngas outlet bobbin carriage (55) top connects three grades of N
2-H
2Syngas outlet is taken over (54) and three grades of N
2-H
2Syngas outlet flange (53); Three grades of an internal pressured cylinders (13) lower left side is installed three grades of clean gas outlet tube sheets (17), three grades of clean gas outlet tube sheets (17) left side connects three grades of clean gas outlet bobbin carriages (18), and three grades of clean gas outlet bobbin carriages (18) top connects three grades of clean gas outlets and takes over (20) and three grades of purified gas suction flanges (19); Three grades of an internal pressured cylinders (13) lower left side is installed three grades of dirty nitrogen inlet tube sheets (24), three grades of dirty nitrogen inlet tube sheets (24) left side connects three grades of dirty nitrogen inlet bobbin carriages (23), and three grades of dirty nitrogen inlet bobbin carriages (23) top connects three grades of dirty nitrogen inlets and takes over (22) and three grades of dirty nitrogen inlet flanges (21); Three grades of H are installed on three grades of an internal pressured cylinders (13) right side, bottom
2Import tube sheet (42), three grades of H
2Import tube sheet (42) right side connects three grades of H
2Import bobbin carriage (39), three grades of H
2Import bobbin carriage (39) top connects three grades of H
2Entrance sleeve (41) and three grades of H
2Suction flange (40); Three grades of N are installed on three grades of an internal pressured cylinders (13) right side, bottom
2-H
2Synthesis gas import tube sheet (35), three grades of N
2-H
2Synthesis gas import tube sheet (35) right side connects three grades of N
2-H
2Synthesis gas import bobbin carriage (36), three grades of N
2-H
2Synthesis gas import bobbin carriage (36) top connects three grades of N
2-H
2synthesis gas entrance sleeve (37) and three grades of N
2-H
2synthesis gas suction flange (38), three grades of supplementary LN are installed in the middle of three grades of an internal pressured cylinders (13) bottom
2suction flange (25) and three grades of supplementary LN
2entrance sleeve (26), three grades of supplementary LN
2entrance sleeve (26) connects three grades of supplementary liquid nitrogen spraying pipes (34), and three grades of supplementary liquid nitrogen spraying pipes (34) are installed under tertiary centre cylinder (44), three grades of an internal pressured cylinders (13), press end socket (58) in three grades, depress end socket (33) outer surface three grades of cylindrical shell vacuum multilayer insulation layers (14) that alternately parcel consists of multilayer heat insulation paper and laminated aluminium foil respectively in three grades, three grades of upper cover vacuum multilayer insulation layers (57), three grades of low head vacuum multilayer insulation layers (31), three grades of cylindrical shell vacuum multilayer insulation layers (14), three grades of upper cover vacuum multilayer insulation layers (57), three grades of low head vacuum multilayer insulation layers (31) outside is respectively three grades of external pressure cylindrical shells (15), three grades of external pressure upper covers (2), three grades of external pressure low heads (27), three grades of external pressure cylindrical shells (15) top penetrates installs three grades of dirty nitrogen outlet bobbin carriages (4), three grades of purified gas import bobbin carriages (10), three grades of N
2-H
2syngas outlet bobbin carriage (55), three grades of H
2outlet bobbin carriage (49), bottom penetrates installs three grades of clean gas outlet bobbin carriages (18), three grades of dirty nitrogen inlet bobbin carriages (23), three grades of H
2import bobbin carriage (39), three grades of N
2-H
2synthesis gas import bobbin carriage (36), three grades of external pressure upper covers (2) middle part penetrates installs three grades of high pressure N
2entrance sleeve (1), three grades of skirts (30) and three grades of vacuum adapters (32) are installed in three grades of external pressure low heads (27) bottom, and middle part penetrates installs three grades of high pressure LN
2discharge connection (28).
Vacuumize and detect without after quality problems, low temperature liquid nitrogen is wound around to pipe type heat transfer equipment connecting system device with three grades of backheat multiple flows.
By H2-191.5 ℃, squeeze into three grades of H during 1.8MPa
2import bobbin carriage (39), at three grades of H
2be allocated in three grades of H in import bobbin carriage (39)
2be wound around tube bank (47) each arm, three grades of H
2be wound around tube bank (47) after spiral winding in three grades of an internal pressured cylinders (13) by from three grades of high pressure N
2the shell side high pressure N of entrance sleeve (1)
2heating, temperature is increased to-130.2 ℃, pressure decreased to 1.78MPa, then flow to three grades of H
2outlet bobbin carriage (49), then through three grades of H
2discharge connection (50) flows out into the two-stage system device for cooling.
By N
2-H
2synthesis gas-193.4 ℃, squeeze into three grades of N during 5.19MPa
2-H
2synthesis gas import bobbin carriage (36), at three grades of N
2-H
2be allocated in three grades of N in synthesis gas import bobbin carriage (36)
2-H
2synthesis gas is wound around tube bank (52) each arm, three grades of N
2-H
2synthesis gas be wound around tube bank (52) after spiral winding in three grades of an internal pressured cylinders (13) by from three grades of high pressure N
2the shell side high pressure N of entrance sleeve (1)
2heating, temperature is increased to-130.2 ℃, pressure decreased to 5.14MPa, then flow to three grades of N
2-H
2syngas outlet bobbin carriage (55), then through three grades of N
2-H
2syngas outlet is taken over (54) and is flowed out into the two-stage system device for cooling.
By N
2-A
r-CO-CH
4dirty nitrogen-191.5 ℃, squeeze into three grades of dirty nitrogen inlet bobbin carriages (23) during 0.18MPa, be allocated in three grades of dirty nitrogen and be wound around tube bank (7) each arms in three grades of dirty nitrogen inlet bobbin carriage (23), three grades of dirty nitrogen be wound around tube bank (7) after spiral winding in three grades of an internal pressured cylinders (13) by from three grades of high pressure N
2the shell side high pressure N of entrance sleeve (1)
2heating, temperature is increased to-130.2 ℃, pressure decreased to 0.15MPa, then flow to three grades of dirty nitrogen outlet bobbin carriages (4), then flows out into the two-stage system device for cooling through three grades of dirty nitrogen discharge connections (5).
By H
2-N
2-CO-A
r-CH
4purified gas-127.2 ℃, squeeze into three grades of purified gas import bobbin carriages (10) during 5.24MPa, be allocated in three grades of purified gas and be wound around tube bank (12) each arms in three grades of purified gas import bobbin carriage (10), three grades of purified gas be wound around tube bank (12) after spiral winding three grades of an internal pressured cylinders (13) in quilt-191.5 ℃, 1.8MPa H
2,-193.4 ℃, 5.19MPa N
2-H
2synthesis gas and-191.5 ℃, 0.18MPa N
2-A
r-CO-CH
4dirty nitrogen is cooled to-188.2 ℃, 5.21MPa, then flow to three grades of clean gas outlet bobbin carriages (18), then flows out into scrubbing tower through three grades of clean gas outlets adapters (20).
By high pressure N
2-127.2 ℃, during 5.7MPa through three grades of high pressure N
2entrance sleeve (1) enters housing, by three grades of dirty nitrogen, is wound around dirty nitrogen, three grades of N in tube bank (7)
2-H
2synthesis gas is wound around tube bank (52) interior synthesis gas, three grades of H
2be wound around tube bank (47) interior hydrogen_cooling to-188 ℃, 5.6MPa LN
2, through three grades of high pressure LN
2discharge connection (28) flows out into scrubbing tower.
To supplement cold LN
2-193.4 ℃, during 5.9MPa through three grades of supplementary LN
2entrance sleeve (26) is squeezed into lower housing portion, and the cooling three grades of dirty nitrogen of upward spraying are wound around tube bank (7), three grades of N
2-H
2synthesis gas is wound around tube bank (52), three grades of H
2be wound around tube bank (47), three grades of purified gas are wound around tube bank (12), then with housing inner high voltage N
2mixing is by three grades of high pressure LN
2discharge connection (28) flows out into scrubbing tower.
Claims (7)
1. low temperature liquid nitrogen is wound around the pipe type heat transfer equipment with three grades of backheat multiple flows, comprises three grades of high pressure N
2entrance sleeve (1), three grades of external pressure upper covers (2), three grades of dirty nitrogen outlet tube sheets (3), three grades of dirty nitrogen outlet bobbin carriages (4), three grades of dirty nitrogen discharge connections (5), three grades of dirty nitrogen outlet(discharge) flanges (6), three grades of dirty nitrogen are wound around tube bank (7), three grades of purified gas suction flanges (8), three grades of purified gas entrance sleeves (9), three grades of purified gas import bobbin carriages (10), three grades of purified gas import tube sheets (11), three grades of purified gas are wound around tube bank (12), three grades of an internal pressured cylinders (13), three grades of cylindrical shell vacuum multilayer insulation layers (14), three grades of external pressure cylindrical shells (15), three grades of lower support circles (16), three grades of clean gas outlet tube sheets (17), three grades of clean gas outlet bobbin carriages (18), three grades of clean gas outlet flanges (19), three grades of clean gas outlets are taken over (20), three grades of dirty nitrogen inlet flanges (21), three grades of dirty nitrogen inlets are taken over (22), three grades of dirty nitrogen inlet bobbin carriages (23), three grades of dirty nitrogen inlet tube sheets (24), three grades of supplementary LN
2suction flange (25), three grades of supplementary LN
2entrance sleeve (26), three grades of external pressure low heads (27), three grades of high pressure LN
2discharge connection (28), three grades of high pressure LN
2depress end socket (33), three grades of supplementary liquid nitrogen spraying pipes (34), three grades of N in outlet(discharge) flange (29), three grades of skirts (30), three grades of low head vacuum multilayer insulation layers (31), three grades of vacuum adapters (32), three grades
2-H
2synthesis gas import tube sheet (35), three grades of N
2-H
2synthesis gas import bobbin carriage (36), three grades of N
2-H
2synthesis gas entrance sleeve (37), three grades of N
2-H
2synthesis gas suction flange (38), three grades of H
2import bobbin carriage (39), three grades of H
2suction flange (40), three grades of H
2entrance sleeve (41),Three grades of H
2Import tube sheet (42), three grades of dividing plates (43), tertiary centre cylinder (44), spiral coil (45), three grades of upper support circles (46), three grades of H
2Be wound around tube bank (47), three grades of H
2Outlet tube sheet (48), three grades of H
2Outlet bobbin carriage (49), three grades of H
2Discharge connection (50), three grades of H
2Outlet(discharge) flange (51), three grades of N
2-H
2Synthesis gas is wound around tube bank (52), three grades of N
2-H
2Syngas outlet flange (53), three grades of N
2-H
2Syngas outlet is taken over (54), three grades of N
2-H
2Syngas outlet bobbin carriage (55), three grades of N
2-H
2Press end socket (58), three grades of high pressure N in syngas outlet tube sheet (56), three grades of upper cover vacuum multilayer insulation layers (57), three grades
2Suction flange (59) is characterized in that: three grades of dirty nitrogen are wound around tube bank (7), three grades of N
2-H
2Synthesis gas is wound around tube bank (52), three grades of purified gas are wound around tube bank (12), three grades of H
2Be wound around tube bank (47), be wound around around tertiary centre cylinder (44), the spiral coil after winding (45) is installed in three grades of an internal pressured cylinders (13); Tertiary centre cylinder (44) one ends are installed three grades of upper support circles (46), one end is installed three grades of lower support circles (16), three grades of upper support circles (46) are fixed in three grades of an internal pressured cylinders (13) top, three grades of lower support circles (16) are fixed in three grades of an internal pressured cylinders (13) bottom, and three grades of dirty nitrogen are wound around tube bank (7), three grades of N
2-H
2Synthesis gas is wound around tube bank (52), three grades of purified gas are wound around tube bank (12), three grades of H
2Being wound around tube bank (47) is wound between three grades of upper support circles (46) and three grades of lower support circles (16); Three grades of an internal pressured cylinders (13) top with press end socket (58) in three grades and be connected, press end socket (58) top in three grades three grades of high pressure N are installed
2Entrance sleeve (1) and three grades of high pressure N
2Suction flange (59); Three grades of an internal pressured cylinders (13) bottom with depress end socket (33) in three grades and be connected, depress end socket (33) top in three grades three grades of high pressure LN are installed
2Discharge connection (28) and three grades of high pressure LN
2Outlet(discharge) flange (29); Three grades of an internal pressured cylinders (13) upper left-hand is installed three grades of purified gas import tube sheets (11), three grades of purified gas import tube sheets (11) left side connects three grades of purified gas import bobbin carriages (10), and three grades of purified gas import bobbin carriages (10) top connects three grades of purified gas entrance sleeves (9) and three grades of purified gas suction flanges (8); Three grades of an internal pressured cylinders (13) upper left-hand is installed three grades of dirty nitrogen outlet tube sheets (3), three grades of dirty nitrogen outlet tube sheets (3) left side connects three grades of dirty nitrogen outlet bobbin carriages (4), and three grades of dirty nitrogen outlet bobbin carriage (4) tops connect three grades of dirty nitrogen discharge connections (5) and three grades of dirty nitrogen outlet(discharge) flanges (6); Three grades of an internal pressured cylinders (13) upper right is installed three grades of H
2Outlet tube sheet (48), three grades of H
2Outlet tube sheet (48) right side connects three grades of H
2Outlet bobbin carriage (49), three grades of H
2Outlet bobbin carriage (49) top connects three grades of H
2Discharge connection (50) and three grades of H
2Outlet(discharge) flange (51); Three grades of an internal pressured cylinders (13) upper right is installed three grades of N
2-H
2Syngas outlet tube sheet (56), three grades of N
2-H
2Syngas outlet tube sheet (56) right side connects three grades of N
2-H
2Syngas outlet bobbin carriage (55), three grades of N
2-H
2Syngas outlet bobbin carriage (55) top connects three grades of N
2-H
2Syngas outlet is taken over (54) and three grades of N
2-H
2Syngas outlet flange (53); Three grades of an internal pressured cylinders (13) lower left side is installed three grades of clean gas outlet tube sheets (17), three grades of clean gas outlet tube sheets (17) left side connects three grades of clean gas outlet bobbin carriages (18), and three grades of clean gas outlet bobbin carriages (18) top connects three grades of clean gas outlets and takes over (20) and three grades of purified gas suction flanges (19); Three grades of an internal pressured cylinders (13) lower left side is installed three grades of dirty nitrogen inlet tube sheets (24), three grades of dirty nitrogen inlet tube sheets (24) left side connects three grades of dirty nitrogen inlet bobbin carriages (23), and three grades of dirty nitrogen inlet bobbin carriages (23) top connects three grades of dirty nitrogen inlets and takes over (22) and three grades of dirty nitrogen inlet flanges (21); Three grades of H are installed on three grades of an internal pressured cylinders (13) right side, bottom
2Import tube sheet (42), three grades of H
2Import tube sheet (42) right side connects three grades of H
2Import bobbin carriage (39), three grades of H
2Import bobbin carriage (39) top connects three grades of H
2Entrance sleeve (41) and three grades of H
2Suction flange (40); Three grades of N are installed on three grades of an internal pressured cylinders (13) right side, bottom
2-H
2Synthesis gas import tube sheet (35), three grades of N
2-H
2Synthesis gas import tube sheet (35) right side connects three grades of N
2-H
2Synthesis gas import bobbin carriage (36), three grades of N
2-H
2Synthesis gas import bobbin carriage (36) top connects three grades of N
2-H
2synthesis gas entrance sleeve (37) and three grades of N
2-H
2synthesis gas suction flange (38), three grades of supplementary LN are installed in the middle of three grades of an internal pressured cylinders (13) bottom
2suction flange (25) and three grades of supplementary LN
2entrance sleeve (26), three grades of supplementary LN
2entrance sleeve (26) connects three grades of supplementary liquid nitrogen spraying pipes (34), and three grades of supplementary liquid nitrogen spraying pipes (34) are installed under tertiary centre cylinder (44), three grades of an internal pressured cylinders (13), press end socket (58) in three grades, depress end socket (33) outer surface three grades of cylindrical shell vacuum multilayer insulation layers (14) that alternately parcel consists of multilayer heat insulation paper and laminated aluminium foil respectively in three grades, three grades of upper cover vacuum multilayer insulation layers (57), three grades of low head vacuum multilayer insulation layers (31), three grades of cylindrical shell vacuum multilayer insulation layers (14), three grades of upper cover vacuum multilayer insulation layers (57), three grades of low head vacuum multilayer insulation layers (31) outside is respectively three grades of external pressure cylindrical shells (15), three grades of external pressure upper covers (2), three grades of external pressure low heads (27), three grades of external pressure cylindrical shells (15) top penetrates installs three grades of dirty nitrogen outlet bobbin carriages (4), three grades of purified gas import bobbin carriages (10), three grades of N
2-H
2syngas outlet bobbin carriage (55), three grades of H
2outlet bobbin carriage (49), bottom penetrates installs three grades of clean gas outlet bobbin carriages (18), three grades of dirty nitrogen inlet bobbin carriages (23), three grades of H
2import bobbin carriage (39), three grades of N
2-H
2synthesis gas import bobbin carriage (36), three grades of external pressure upper covers (2) middle part penetrates installs three grades of high pressure N
2entrance sleeve (1), three grades of skirts (30) and three grades of vacuum adapters (32) are installed in three grades of external pressure low heads (27) bottom, and middle part penetrates installs three grades of high pressure LN
2discharge connection (28).
2. according to claim
1described low temperature liquid nitrogen is wound around the pipe type heat transfer equipment with three grades of backheat multiple flows, it is characterized in that: H
2-191.5 ℃, enter three grades of H during 1.8MPa
2import bobbin carriage (39), at three grades of H
2be allocated in three grades of H in import bobbin carriage (39)
2be wound around tube bank (47) each arm, three grades of H
2be wound around tube bank (47) after spiral winding in three grades of an internal pressured cylinders (13) by from three grades of high pressure N
2the shell side high pressure N of entrance sleeve (1)
2heating, temperature is increased to-130.2 ℃, pressure decreased to 1.78MPa, then flow to three grades of H
2outlet bobbin carriage (49), then through three grades of H
2discharge connection (50) flows out into the two-stage system device for cooling.
3. according to claim
1described low temperature liquid nitrogen is wound around the pipe type heat transfer equipment with three grades of backheat multiple flows, it is characterized in that: N
2-H
2synthesis gas-193.4 ℃, enter three grades of N during 5.19MPa
2-H
2synthesis gas import bobbin carriage (36), at three grades of N
2-H
2be allocated in three grades of N in synthesis gas import bobbin carriage (36)
2-H
2synthesis gas is wound around tube bank (52) each arm, three grades of N
2-H
2synthesis gas be wound around tube bank (52) after spiral winding in three grades of an internal pressured cylinders (13) by from three grades of high pressure N
2the shell side high pressure N of entrance sleeve (1)
2heating, temperature is increased to-130.2 ℃, pressure decreased to 5.14MPa, then flow to three grades of N
2-H
2syngas outlet bobbin carriage (55), then through three grades of N
2-H
2syngas outlet is taken over (54) and is flowed out into the two-stage system device for cooling.
4. according to claim
1described low temperature liquid nitrogen is wound around the pipe type heat transfer equipment with three grades of backheat multiple flows, it is characterized in that: N
2-A
r-CO-CH
4dirty nitrogen-191.5 ℃, enter three grades of dirty nitrogen inlet bobbin carriages (23) during 0.18MPa, be allocated in three grades of dirty nitrogen and be wound around tube bank (7) each arms in three grades of dirty nitrogen inlet bobbin carriage (23), three grades of dirty nitrogen be wound around tube bank (7) after spiral winding in three grades of an internal pressured cylinders (13) by from three grades of high pressure N
2the shell side high pressure N of entrance sleeve (1)
2heating, temperature is increased to-130.2 ℃, pressure decreased to 0.15MPa, then flow to three grades of dirty nitrogen outlet bobbin carriages (4), then flows out into the two-stage system device for cooling through three grades of dirty nitrogen discharge connections (5).
5. according to claim
1described low temperature liquid nitrogen is wound around the pipe type heat transfer equipment with three grades of backheat multiple flows, it is characterized in that: H
2-N
2-CO-A
r-CH
4purified gas-127.2 ℃, enter three grades of purified gas import bobbin carriages (10) during 5.24MPa, be allocated in three grades of purified gas and be wound around tube bank (12) each arms in three grades of purified gas import bobbin carriage (10), three grades of purified gas be wound around tube bank (12) after spiral winding three grades of an internal pressured cylinders (13) in quilt-191.5 ℃, 1.8MPa H
2,-193.4 ℃, 5.19MPa N
2-H
2synthesis gas and-191.5 ℃, 0.18MPa N
2-A
r-CO-CH
4dirty nitrogen is cooled to-188.2 ℃, 5.21MPa, then flow to three grades of clean gas outlet bobbin carriages (18), then flows out into scrubbing tower through three grades of clean gas outlets adapters (20).
6. according to claim
1described low temperature liquid nitrogen is wound around the pipe type heat transfer equipment with three grades of backheat multiple flows, it is characterized in that: high pressure N
2-127.2 ℃, during 5.7MPa through three grades of high pressure N
2entrance sleeve (1) enters housing, by three grades of dirty nitrogen, is wound around dirty nitrogen, three grades of N in tube bank (7)
2-H
2synthesis gas is wound around tube bank (52) interior synthesis gas, three grades of H
2be wound around tube bank (47) interior hydrogen_cooling to-188 ℃, 5.6MPa LN
2, through three grades of high pressure LN
2discharge connection (28) flows out into scrubbing tower.
7. according to claim
1described low temperature liquid nitrogen is wound around the pipe type heat transfer equipment with three grades of backheat multiple flows, it is characterized in that: supplemented cold LN
2-193.4 ℃, during 5.9MPa through three grades of supplementary LN
2entrance sleeve (26) enters lower housing portion, and the cooling three grades of dirty nitrogen of upward spraying are wound around tube bank (7), three grades of N
2-H
2synthesis gas is wound around tube bank (52), three grades of H
2be wound around tube bank (47), three grades of purified gas are wound around tube bank (12), then with housing inner high voltage N
2mixing is by three grades of high pressure LN
2discharge connection (28) flows out into scrubbing tower.
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| CN201310358118.7A CN103438667B (en) | 2013-08-16 | 2013-08-16 | Low temperature liquid nitrogen three grades of backheat multiple flows are wound around pipe type heat transfer equipment |
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| CN201310358118.7A CN103438667B (en) | 2013-08-16 | 2013-08-16 | Low temperature liquid nitrogen three grades of backheat multiple flows are wound around pipe type heat transfer equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103438667A true CN103438667A (en) | 2013-12-11 |
| CN103438667B CN103438667B (en) | 2015-08-12 |
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| CN201310358118.7A Expired - Fee Related CN103438667B (en) | 2013-08-16 | 2013-08-16 | Low temperature liquid nitrogen three grades of backheat multiple flows are wound around pipe type heat transfer equipment |
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| CN (1) | CN103438667B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103663392A (en) * | 2013-11-22 | 2014-03-26 | 张周卫 | Diffusion refrigeration type low-temperature liquid nitrogen washing tower |
| CN106123484A (en) * | 2015-05-09 | 2016-11-16 | 张周卫 | Cold three stream plate-fin heat exchanger of LNG low-temperature liquefaction three tier structure |
| CN111527365A (en) * | 2017-11-06 | 2020-08-11 | 伊科帕尔公司 | Container for recovering heat energy of waste water |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0117829B1 (en) * | 1983-02-24 | 1988-01-07 | Daniel Zündel | Tubular heat exchanger |
| DE9010096U1 (en) * | 1989-07-12 | 1990-10-18 | Apaco Ag Fuer Apparatebau, Grellingen, Ch | |
| CN102455139A (en) * | 2011-10-18 | 2012-05-16 | 张周卫 | Double-strand-flow low-temperature spiral winding pipe type heat exchanger with vacuum heat insulation function |
| CN102564167A (en) * | 2011-10-14 | 2012-07-11 | 张周卫 | Single-flow low-temperature spiral winding tube type heat exchanger with vacuum heat-insulation effect |
-
2013
- 2013-08-16 CN CN201310358118.7A patent/CN103438667B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0117829B1 (en) * | 1983-02-24 | 1988-01-07 | Daniel Zündel | Tubular heat exchanger |
| DE9010096U1 (en) * | 1989-07-12 | 1990-10-18 | Apaco Ag Fuer Apparatebau, Grellingen, Ch | |
| CN102564167A (en) * | 2011-10-14 | 2012-07-11 | 张周卫 | Single-flow low-temperature spiral winding tube type heat exchanger with vacuum heat-insulation effect |
| CN102455139A (en) * | 2011-10-18 | 2012-05-16 | 张周卫 | Double-strand-flow low-temperature spiral winding pipe type heat exchanger with vacuum heat insulation function |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103663392A (en) * | 2013-11-22 | 2014-03-26 | 张周卫 | Diffusion refrigeration type low-temperature liquid nitrogen washing tower |
| CN103663392B (en) * | 2013-11-22 | 2015-03-25 | 张周卫 | Diffusion refrigeration type low-temperature liquid nitrogen washing tower |
| CN106123484A (en) * | 2015-05-09 | 2016-11-16 | 张周卫 | Cold three stream plate-fin heat exchanger of LNG low-temperature liquefaction three tier structure |
| CN111527365A (en) * | 2017-11-06 | 2020-08-11 | 伊科帕尔公司 | Container for recovering heat energy of waste water |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103438667B (en) | 2015-08-12 |
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