CN202880860U - Energy-saving device for preparing high-purity hydrogen/nitrogen mixed gas through ammonia decomposition - Google Patents
Energy-saving device for preparing high-purity hydrogen/nitrogen mixed gas through ammonia decomposition Download PDFInfo
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- CN202880860U CN202880860U CN2012205906057U CN201220590605U CN202880860U CN 202880860 U CN202880860 U CN 202880860U CN 2012205906057 U CN2012205906057 U CN 2012205906057U CN 201220590605 U CN201220590605 U CN 201220590605U CN 202880860 U CN202880860 U CN 202880860U
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Abstract
The utility model relates to an energy-saving device for preparing high-purity hydrogen/nitrogen mixed gas through ammonia decomposition, which comprises an ammonia gas input pipe, a heat exchanger, an ammonia decomposition furnace, a water cooler, a first purifier and a hydrogen/nitrogen mixed gas discharge pipe, wherein the heat exchanger is divided into a transverse channel and a longitudinal channel; the ammonia gas input pipe is connected with and communicated with the inlet end of the transverse channel of the heat exchanger; the outlet end of the transverse channel of the heat exchanger is connected with and communicated with the inlet end of the ammonia decomposition furnace through a first pipeline; the outlet end of the ammonia decomposition furnace is connected with and communicated with the inlet end of the longitudinal channel of the heat exchanger through a second pipeline; the outlet end of the longitudinal channel of the heat exchanger is connected with and communicated with the inlet end of the water cooler through a third pipeline; a first purification and regeneration channel is included in the first purifier; and a molecular sieve is arranged in the first purification and regeneration channel. According to the device, the total energy consumption for preparation of every cubic meter of high-purity hydrogen/nitrogen mixed gas is 0.5 kilowatt-hour or below, and the energy can be saved by 18-25% in comparison with the existing system.
Description
Technical field
The utility model belongs to energy-saving field, relates to a kind of ammonia and decomposes and purifying plant, especially relates to a kind of energy-saving ammonia and decomposes the device that obtains high pure hydrogen nitrogen mixed gas.
Background technology
High pure hydrogen nitrogen mixed gas has obtained application in increasing industry, comprise metal polish, the numerous areas such as preparation of microelectronic chip manufacturing, high-purity ammon.Along with the increase of hydrogen and nitrogen gas usage quantity, obtain High Purity Hydrogen nitrogen how more energy-conservationly and become more and more important.For example: Chinese patent ZL 200910062709.3, name is called " ammonia catalytic pyrolysis, hydrogen and nitrogen gas purifying and the integrated method for preparing high-purity ammon of three step of ammonia synthesis " and discloses a kind of method for preparing high-purity ammon.This is a kind of traditional novel method that rectification and purification obtains high-purity ammon of passing through that is different from.The method comprises the processing step of following three organic integration, the first step: the ammonia catalytic pyrolysis obtains required unstripped gas-hydrogen nitrogen mixed gas; Second step: with the hydrogen nitrogen mixed gas purifying; The 3rd step: use highly purified hydrogen nitrogen mixed gas to synthesize high-purity ammon.The purity of hydrogen nitrogen mixed gas reaches 99.999%～99.9999999% in the method.
Existing technique by ammonia decomposition acquisition high pure hydrogen nitrogen mixed gas comprises two parts: ammonia decomposes and purifies.
1) ammonia decomposes:
This reaction is the inverse process of ammonia synthesis reaction, and its reaction equation is as follows:
This reaction is a thermo-negative reaction, is the reaction that volume increases simultaneously, for NH
3Be decomposed into as much as possible H
2And N
2, reaction conditions need be set to high-temperature low-pressure, and temperature of reaction is 700～900 ℃ (representative value is 800 ℃) usually, and reaction pressure (pounds per square inch absolute (psia)) is located at about 1.5～10 normal atmosphere usually, also is that the indication pressure of instrument is about 0.5～9 normal atmosphere.
2) purify:
In order to obtain purity at the hydrogen nitrogen mixed gas more than 99.999%, need to obtain hydrogen nitrogen mixed gas to decomposition purifies, purify and usually adopt the method for molecular sieve adsorption, at room temperature, molecular sieve can adsorb the various impurity such as residual ammonia in the gas mixture, water, and the purity of hydrogen nitrogen mixed gas is reached more than 99.999%.
After adsorbent of molecular sieve work for some time, along with the impurity of molecular sieve adsorption is more and more, molecular sieve adsorption can lose efficacy, this just need to regenerate, regenerative process need to heat to molecular sieve, allow impurity and molecular sieving, blow over molecular sieve impurity is taken away thereby pass into simultaneously high pure nitrogen or high pure hydrogen nitrogen mixed gas.In order to make the system can non-stop run, usually adopt two groups of molecular sieves to take turns to operate, wherein one group of molecular sieve is in adsorbed state, another group is in reproduced state, during absorption molecular sieve place at room temperature, and molecular sieve need to be within for some time under 250～350 ℃ the temperature during regeneration.
It is low that existing ammonia decomposes, the hydrogen nitrogen mixed gas purifying technique has a utilization rate of waste heat, the defective that energy consumption is high.
The utility model content
The technical problems to be solved in the utility model provides a kind of energy-saving ammonia and decomposes the device that obtains high pure hydrogen nitrogen mixed gas.This device takes full advantage of the waste heat of the high temperature hydrogen nitrogen mixed gas after the decomposition, and waste heat at first is used for the temperature of the front ammonia of lifting factorization, and then is then used in the regeneration of molecular sieve in the purification system, and the purity of High Purity Hydrogen nitrogen is more than 99.999%.Integrate, so that the total energy consumption that obtains every cubic metre of high pure hydrogen nitrogen mixed gas is below 0.5 kilowatt-hour, more existing energy saving of system 18～25%.
For solving the problems of the technologies described above, the utility model adopts following technical scheme:
A kind of energy-saving ammonia decomposes the device that obtains high pure hydrogen nitrogen mixed gas, comprises ammonia input tube, interchanger, ammonia destruction furnace, water cooler, the first purifier and hydrogen nitrogen mixed gas delivery pipe;
Described interchanger is divided into interconnection and vertical passage, and described interconnection and vertical passage are not communicated with mutually; In the device normal course of operation, the material in interconnection and the vertical passage carries out heat exchange;
Described ammonia input tube is connected with the interconnection entrance end of interchanger and communicates, the interconnection exit end of described interchanger is connected with the ammonia destruction furnace entrance end by the first pipeline and communicates, the exit end of described ammonia destruction furnace is connected with interchanger vertical passage entrance end by second pipe and communicates, and described interchanger vertical passage exit end is connected with the water cooler entrance end by the 3rd pipeline and communicates;
Comprise the first purifying regeneration passage in described the first purifier, be provided with molecular sieve in described the first purifying regeneration passage;
The exit end of described water cooler is connected by the 4th pipeline and the first purifying regeneration channel entrance end and communicates;
Described the first purifying regeneration channel outlet connects the hydrogen nitrogen mixed gas delivery pipe by the 5th pipeline.
Preferably, be covered with thermal insulating warm-keeping layer on described interchanger and the ammonia destruction furnace outer wall.This has reduced energy waste on the one hand, has also avoided on the other hand high temperature furnace wall and tube wall that personnel's possible accident is scalded.
Preferably, described the 5th pipeline is provided with the 6th pipeline in parallel; The first purifying regeneration channel entrance end of described the first purifier connects the first regeneration tail gas delivery pipe; Described the 3rd pipeline is provided with the first valve, and described the 4th pipeline is provided with the second valve, and described the 5th pipeline is provided with the 3rd valve, and described the 6th pipeline is provided with the 4th valve, and described the first regeneration tail gas delivery pipe is provided with the 5th valve.Described hydrogen nitrogen mixed gas delivery pipe, the 6th pipeline, the first purifying regeneration passage and the first regeneration tail gas delivery pipe consist of the first regeneration system rapidly.
Preferably, also comprise the first heat tunnel in described the first purifier; Described the first purifying regeneration passage and the first heat tunnel are not communicated with mutually; Described the 3rd device for cleaning pipeline is crossed the 7th pipeline and is connected with the first heat tunnel entrance end and communicates; Described the first heat tunnel exit end is connected with the entrance end of water cooler by the 8th pipeline and communicates; Described the 8th pipeline is provided with the 6th valve.Therefore, the first heat tunnel, the 8th pipeline in described the 7th pipeline, the first purifier forms the first heating system.After first purifier work for some time, the molecular sieve adsorption in it after more impurity or ammonia, adsorption function will progressively weaken, and at this moment needs to carry out it is regenerated; After ammonia in the ammonia destruction furnace decomposes, about 350 ℃ of the temperature of the hydrogen nitrogen mixed gas that obtains after the interchanger heat exchange; The regeneration temperature (250～350 ℃) that this temperature is just in time mated molecular sieve that is to say, after the heat exchange hydrogen nitrogen mixed gas with waste heat can be used for the regeneration of molecular sieve.
Preferably, be provided with some tubulations in described the first purifier, this tubulation is as the first heat tunnel; The outer interior space of the first purifier of described tubulation forms the first purifying regeneration passage.Heat to molecular sieve by tubulation with hydrogen nitrogen mixed gas, to utilize fully the waste heat of hydrogen nitrogen mixed gas, reduce energy consumption.This is different from the structure of existing purifier, and existing purifier all adopts electric heater to heat to molecular sieve, means extra energy consumption.
Preferably, paste the adiabatic heat-insulation sealing coat on described the first purifier outer wall, to reduce energy waste.
Further improved technical scheme, the utility model device also comprises the second purifier, comprises the second purifying regeneration passage in described the second purifier; Be provided with molecular sieve in described the second purifying regeneration passage; The exit end of described water cooler is connected by the 9th pipeline and the second purifying regeneration channel entrance end and communicates, and described the 9th pipeline is provided with the 7th valve; Described the second purifying regeneration channel outlet connects the hydrogen nitrogen mixed gas delivery pipe by the tenth pipeline, and described the tenth pipeline is provided with the 8th valve.When this device comprises two purifiers, owing to need regeneration after the molecular sieve work for some time in the purifier, but so that regeneration and absorption one after the other work, this means that this device can process ammonia-containing exhaust continuously.
Preferably, described the tenth pipeline is provided with the 11 pipeline in parallel, and the 11 pipeline is provided with the 9th valve; The second purifying regeneration channel entrance end of described the second purifier connects the second regeneration tail gas delivery pipe, and described the second regeneration tail gas delivery pipe is provided with the tenth valve; Consist of the second regeneration system rapidly by hydrogen nitrogen mixed gas delivery pipe, the 11 pipeline, the second purifying regeneration passage and the second regeneration tail gas delivery pipe.
Preferably, also comprise the second heat tunnel in described the second purifier; Described the second purifying regeneration passage and the second heat tunnel are not communicated with mutually; Described the 3rd device for cleaning pipeline is crossed the 7th pipeline and is connected with the second heat tunnel entrance end with the 12 pipeline and communicates; Described the second heat tunnel exit end is connected with the entrance end of water cooler by the 13 pipeline and communicates; Described the 13 pipeline is provided with the 11 valve.Therefore, the second heat tunnel, the 13 pipeline in described the 7th pipeline, the 12 pipeline, the second purifier forms the second heating system.After second purifier work for some time, the molecular sieve adsorption in it after more impurity or ammonia, adsorption function will progressively weaken, and at this moment needs to carry out it is regenerated; After ammonia in the ammonia destruction furnace decomposes, about 350 ℃ of the temperature of the hydrogen nitrogen mixed gas that obtains after the interchanger heat exchange; The regeneration temperature (250～350 ℃) that this temperature is just in time mated molecular sieve that is to say, after the heat exchange hydrogen nitrogen mixed gas with waste heat can be used for the regeneration of molecular sieve.
Utilize the energy-saving method for preparing high pure hydrogen nitrogen mixed gas of said apparatus, comprise the steps:
1) ammonia decomposes: the ammonia of room temperature (about 20 ℃) is warming up to more than 700 ℃ after by the heat exchange of interchanger interconnection, then enter ammonia destruction furnace, in ammonia destruction furnace, ammonia further is heated to 750～850 ℃, in heat temperature raising, ammonia contacts with ammonia decomposition catalyzer and is broken down into hydrogen nitrogen mixed gas; Be cooled to large 300～400 ℃ after the vertical passage heat exchange of this hydrogen nitrogen mixed gas by interchanger; Preferably, the outer wall of described interchanger and ammonia destruction furnace is provided with thermal insulating warm-keeping layer, and this has reduced energy consumption on the one hand, has also avoided on the other hand high temperature furnace wall and tube wall that personnel's possible accident is scalded;
Integrate, the ammonia of room temperature obtains 300～400 ℃ hydrogen nitrogen mixed gas through after comprising interchanger and ammonia destruction furnace, and the pressure of gas can reach 10 normal atmosphere.The hydrogen nitrogen mixed gas that obtains like this can contain a small amount of water, ammonia and other impurity, in order to obtain high-purity hydrogen nitrogen mixed gas, need to be further purified;
2) the first purifier is purified:
Open the first valve, the second valve and the 3rd valve; Close the 4th valve, the 5th valve and the 6th valve; 300～400 ℃ hydrogen nitrogen mixed gas are transported to water cooler are cooled to 20～30 ℃, then in the 4th pipeline was transported to the first purifying regeneration passage of the first purifier, the molecular sieve purification in this passage was transported to the hydrogen nitrogen mixed gas delivery pipe by the 5th pipeline; What preferably, fill in described the first purifying regeneration passage is the 5A molecular sieve;
For the ability of the absorption impurity that takes full advantage of molecular sieve, need to be cooled to 20～30 ℃ to 300～400 ℃ of hydrogen nitrogen mixed gas obtained in the previous step through water cooler, because molecular sieve has the ability of stronger absorption impurity during than high temperature in room temperature; And then allow hydrogen nitrogen mixed gas purify by molecular sieve, namely allow molecular sieve adsorption fall wherein impurity; What preferably, fill in described the first purifying regeneration passage is the 5A molecular sieve; Because it has best adsorption function to impurity such as water, ammonia; Through the purification of molecular sieve, the purity of hydrogen nitrogen mixed gas can reach more than 99.999%;
3) the first purifier regeneration:
Close the second valve and the 3rd valve; Open the first valve, the 4th valve, the 5th valve and the 6th valve; 300～400 ℃ hydrogen nitrogen mixed gas in the 7th pipeline is transported to the first heat tunnel of the first purifier, are heated the molecular sieve in the first purifying regeneration passage; Hydrogen nitrogen mixed gas after the heating is transported to the entrance end of water cooler through the 8th pipeline; Simultaneously with step 2) the product hydrogen nitrogen mixed gas that obtains is in the 6th pipeline is transported to the first purifying regeneration passage of the first purifier, the product hydrogen nitrogen mixed gas is to the molecular sieve inflation regeneration in the first purifying regeneration passage, and resurgent gases is discharged through the first regeneration tail gas delivery pipe; Preferably, described the first heat tunnel is some tubulations.
The temperature that step 1) ammonia decomposes the hydrogen nitrogen mixed gas that obtains is about 300～400 ℃, this temperature is just in time mated the regeneration temperature (250～350 ℃) of molecular sieve, that is to say, hydrogen nitrogen mixed gas with waste heat just in time be applicable to the regeneration of molecular sieve, this is different from existing purifier, existing purifier all adopts electric heater to heat to molecular sieve, this means extra energy consumption;
Can see, the working order of purifier and reproduced state, the air flow line by molecular sieve is opposite, in addition, the gas flow when gas flow is usually much smaller than work during regeneration.
Preferably, a kind of energy-saving method for preparing high pure hydrogen nitrogen mixed gas of said apparatus of utilizing comprises the steps:
1) ammonia decomposes: the ammonia of room temperature (about 20 ℃) is warming up to more than 700 ℃ after by the heat exchange of interchanger interconnection, then enter ammonia destruction furnace, in ammonia destruction furnace, ammonia further is heated to 750～850 ℃, in heat temperature raising, ammonia contacts with ammonia decomposition catalyzer and is broken down into hydrogen nitrogen mixed gas; Be cooled to large 300～400 ℃ after the vertical passage heat exchange of this hydrogen nitrogen mixed gas by interchanger; Preferably, the outer wall of described interchanger and ammonia destruction furnace is provided with thermal insulating warm-keeping layer;
2) the first purifier is purified, the regeneration of the second purifier;
Open the first valve, the second valve, the 3rd valve, the 8th valve, the tenth valve and the 11 valve; Close the 4th valve, the 5th valve, the 6th valve, the 7th valve and the 9th valve;
300～400 ℃ hydrogen nitrogen mixed gas are transported to water cooler are cooled to 20～30 ℃, then in the 4th pipeline was transported to the first purifying regeneration passage of the first purifier, the molecular sieve purification in this passage was transported to the hydrogen nitrogen mixed gas delivery pipe by the 5th pipeline; What preferably, fill in described the first purifying regeneration passage is the 5A molecular sieve;
Gas product in the hydrogen nitrogen mixed gas delivery pipe in the tenth pipeline is transported to the second purifying regeneration passage of the second purifier, is purged molecular sieve, take the impurity on the molecular sieve out of, resurgent gases is discharged through the second regeneration tail gas delivery pipe; Meanwhile, 300～400 ℃ hydrogen nitrogen mixed gas in the 7th pipeline, the 12 pipeline are transported to the second heat tunnel of the second purifier, are heated the molecular sieve in the second purifying regeneration passage by the second heat tunnel; Hydrogen nitrogen mixed gas after the heating is transported to the entrance end of water cooler through the 13 pipeline; Preferably, described the second heat tunnel is some tubulations;
3) the second purifier is purified, the regeneration of the first purifier;
Open the first valve, the 4th valve, the 5th valve, the 6th valve, the 7th valve and the 8th valve; Close the second valve, the 3rd valve, the 9th valve, the tenth valve and the 11 valve;
300～400 ℃ hydrogen nitrogen mixed gas are transported to water cooler are cooled to 20～30 ℃, then in the 9th pipeline was transported to the second purifying regeneration passage of the second purifier, the molecular sieve purification in this passage was transported to the hydrogen nitrogen mixed gas delivery pipe by the tenth pipeline; What preferably, fill in described the second purifying regeneration passage is the 5A molecular sieve;
Gas product in the hydrogen nitrogen mixed gas delivery pipe in the 6th pipeline is transported to the first purifying regeneration passage of the first purifier, is purged molecular sieve, take the impurity on the molecular sieve out of, resurgent gases is discharged through the first regeneration tail gas delivery pipe; Meanwhile, 300～400 ℃ hydrogen nitrogen mixed gas in the 7th pipeline is transported to the first heat tunnel of the first purifier, are heated the molecular sieve in the first purifying regeneration passage by the first heat tunnel; Hydrogen nitrogen mixed gas after the heating is transported to the entrance end of water cooler through the 8th pipeline; Preferably, described the first heat tunnel is some tubulations;
4) step 2) and step 3) move in circles continuous continual preparation high pure hydrogen nitrogen mixed gas product.
The utlity model has following beneficial effect:
1) take full advantage of the waste heat of the high temperature hydrogen nitrogen mixed gas after the decomposition, waste heat at first is used for the temperature of ammonia before the lifting factorization, and then is then used in the regeneration of molecular sieve in the purification system, and the purity of High Purity Hydrogen nitrogen is more than 99.999%;
2) many tubulations are equipped with in purifier inside, be filled with the molecular sieve of purified gases between the tubulation, just can heat to molecular sieve by high-temperature gas in the tubulation, and the hydrogen and nitrogen gas of high-temperature gas after from interchanger of heating molecular sieve, need not extra electric heater unit, needed energy consumption when this has just saved the interior regenerating molecular sieve of purifier;
3) the utility model device can comprise two purifiers, owing to need regeneration after the molecular sieve work for some time in the purifier, so that regeneration and purifying one after the other work this means that this device can uninterruptedly provide high pure hydrogen nitrogen mixed gas continuously;
4) this installs the required energy consumption of one cubic metre of high pure hydrogen nitrogen mixed gas of manufacturing below 0.5 kilowatt-hour, and the purity of the hydrogen and nitrogen gas of acquisition is more than 99.999%;
5) pressure of this device High Purity Hydrogen nitrogen that can provide can reach 1.5～10 normal atmosphere, and relevant the withstand voltage of all devices will reach 10 more than the normal atmosphere.
Integrate, so that the total energy consumption that obtains every cubic metre of high pure hydrogen nitrogen mixed gas is below 0.5 kilowatt-hour, more existing energy saving of system 18～25%.
Description of drawings
Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail
Fig. 1 is the structural representation of the utility model embodiment 1;
Fig. 2 is the structural representation of the utility model embodiment 2;
Fig. 3 is purifier structural representation of the present utility model.
Embodiment
Embodiment 1
A kind of energy-saving ammonia that passes through decomposes the device that obtains high pure hydrogen nitrogen mixed gas, comprises ammonia input tube 100, interchanger 200, ammonia destruction furnace 300, water cooler 400, the first purifier 500 and hydrogen nitrogen mixed gas delivery pipe 600;
Described interchanger 200 is divided into interconnection and vertical passage, and described interconnection and vertical passage are not communicated with mutually; In the device normal course of operation, the material in interconnection and the vertical passage carries out heat exchange;
Described ammonia input tube 100 is connected with the interconnection entrance end of interchanger 200 and communicates, the interconnection exit end of described interchanger 200 is connected with ammonia destruction furnace 300 entrance ends by the first pipeline 701 and communicates, the exit end of described ammonia destruction furnace 300 is connected with interchanger 200 vertical passage entrance ends by second pipe 702 and communicates, and described interchanger 200 vertical passage exit end are connected with water cooler 400 entrance ends by the 3rd pipeline 703 and communicate;
Comprise the first purifying regeneration passage 501 in described the first purifier 500, be provided with molecular sieve 502 in described the first purifying regeneration passage 501;
The exit end of described water cooler 400 is connected by the 4th pipeline 704 and the first purifying regeneration passage 501 entrance ends and communicates;
Described the first purifying regeneration passage 501 exit end connect hydrogen nitrogen mixed gas delivery pipe 600 by the 5th pipeline 705;
Be covered with thermal insulating warm-keeping layer on described interchanger 200 and ammonia destruction furnace 300 outer walls; This has reduced energy waste on the one hand, has also avoided on the other hand high temperature furnace wall and tube wall that personnel's possible accident is scalded;
Described the 5th pipeline 705 is provided with the 6th pipeline 706 in parallel; The first purifying regeneration passage 501 entrance ends of described the first purifier 500 connect the first regeneration tail gas delivery pipe 1000; Described the 3rd pipeline 703 is provided with the first valve 901, described the 4th pipeline 704 is provided with the second valve 902, described the 5th pipeline 705 is provided with the 3rd valve 903, and described the 6th pipeline 706 is provided with the 4th valve 904, and described the first regeneration tail gas delivery pipe 1000 is provided with the 5th valve 905.Described hydrogen nitrogen mixed gas delivery pipe 600, the 6th pipeline 706, the first purifying regeneration passage 501 and the first regeneration tail gas delivery pipe 1000 consist of the first regeneration system rapidly.
Also comprise the first heat tunnel 503 in described the first purifier 500; Described the first purifying regeneration passage 501 and the first heat tunnel 503 are not communicated with mutually; Described the 3rd pipeline 703 is connected with the first heat tunnel 503 entrance ends by the 7th pipeline 707 and communicates; Described the first heat tunnel 503 exit end are connected with the entrance end of water cooler 400 by the 8th pipeline 708 and communicate; Described the 8th pipeline 708 is provided with the 6th valve 906.Therefore, the first heat tunnel 503 in described the 7th pipeline 707, the first purifier 500, the 8th pipeline 708 form the first heating system.After 500 work for some time of the first purifier, the molecular sieve 502 in it has adsorbed after the more impurity or ammonia, and adsorption function will progressively weaken, and at this moment needs to carry out it is regenerated; After ammonia in the ammonia destruction furnace 300 decomposes, about 350 ℃ of the temperature of the hydrogen nitrogen mixed gas that obtains after interchanger 200 heat exchange; The regeneration temperature (250～350 ℃) that this temperature is just in time mated molecular sieve 502 that is to say, after the heat exchange hydrogen nitrogen mixed gas with waste heat can be used for the regeneration of molecular sieve 502.
Be provided with some tubulations in described the first purifier 500, this tubulation is as the first heat tunnel 503; Outer the first purifier 500 interior spaces of described tubulation form the first purifying regeneration passage 501.Heat to molecular sieve 502 by tubulation with hydrogen nitrogen mixed gas, to utilize fully the waste heat of hydrogen nitrogen mixed gas, reduce energy consumption.This is different from the structure of existing purifier, and existing purifier all adopts electric heater to heat to molecular sieve, means extra energy consumption.
Paste adiabatic heat-insulation sealing coat 504 on described the first purifier 500 outer walls, to reduce energy waste.
A kind of energy-saving method for preparing high pure hydrogen nitrogen mixed gas of said apparatus of utilizing comprises the steps:
1) ammonia decomposes: the ammonia of room temperature (about 20 ℃) is warming up to more than 700 ℃ after by interchanger 200 interconnection heat exchange, then enter ammonia destruction furnace 300, ammonia further is heated to 750～850 ℃ in that ammonia destruction furnace 300 is interior, in heat temperature raising, ammonia contacts with ammonia decomposition catalyzer and is broken down into hydrogen nitrogen mixed gas; Be cooled to 300～400 ℃ after the vertical passage heat exchange of this hydrogen nitrogen mixed gas by interchanger 200; The outer wall of described interchanger 200 and ammonia destruction furnace 300 is provided with thermal insulating warm-keeping layer;
2) the first purifier is purified:
Open the first valve 901, the second valve 902 and the 3rd valve 903; Close the 4th valve 904, the 5th valve 905 and the 6th valve 906; 300～400 ℃ hydrogen nitrogen mixed gas are transported to water cooler 400 are cooled to 20～30 ℃, then in the 4th pipeline 704 was transported to the first purifying regeneration passage 501 of the first purifier 500,5A molecular sieve 502 purifying in this passage 501 were transported to hydrogen nitrogen mixed gas delivery pipe 600 by the 5th pipeline 705;
3) the first purifier regeneration:
Close the second valve 902 and the 3rd valve 903; Open the first valve 901, the 4th valve 904, the 5th valve 905 and the 6th valve 906; 300～400 ℃ hydrogen nitrogen mixed gas are transported in some tubulations 503 of the first purifier 500 through the 7th pipe 707 roads, and the molecular sieve 502 in 503 pairs of the first purifying regeneration of some tubulations passage 501 heats; Hydrogen nitrogen mixed gas after the heating is transported to the entrance end of water cooler 400 through the 8th pipeline 708; Simultaneously with step 2) the product hydrogen nitrogen mixed gas that obtains is interior as resurgent gases through the first purifying regeneration passage 501 that the 6th pipeline 706 is transported to the first purifier 500, the product hydrogen nitrogen mixed gas purges regeneration to the molecular sieve 502 in the first purifying regeneration passage 501, and resurgent gases is discharged through the first regeneration tail gas delivery pipe 1000;
The temperature that step 1) ammonia decomposes the hydrogen nitrogen mixed gas that obtains is about 300～400 ℃, this temperature is just in time mated the regeneration temperature (250～350C) of molecular sieve 502, that is to say, hydrogen nitrogen mixed gas with waste heat just in time be applicable to the regeneration of molecular sieve 502, this is different from existing purifier, existing purifier all adopts electric heater to heat to molecular sieve, this means extra energy consumption;
Can see, the working order of purifier 500 and reproduced state, the air flow line by molecular sieve is opposite, in addition, the gas flow when gas flow is usually much smaller than work during regeneration.
Embodiment 2
Repeat embodiment 1, its difference is: a kind of energy-saving device that passes through ammonia decomposition acquisition high pure hydrogen nitrogen mixed gas also comprises the second purifier 800, comprises the second purifying regeneration passage 801 in described the second purifier 800; Be provided with molecular sieve 802 in described the second purifying regeneration passage 801; The exit end of described water cooler 400 is connected by the 9th pipeline 709 and the second purifying regeneration passage 801 entrance ends and communicates, and described the 9th pipeline 709 is provided with the 7th valve 907; Described the second purifying regeneration passage 801 exit end connect hydrogen nitrogen mixed gas delivery pipe 600 by the tenth pipeline 710, and described the tenth pipeline 710 is provided with the 8th valve 908.This device comprises two purifiers 500,800, because working, the molecular sieve 502 in the purifier 500,800,802 needs regeneration after for some time, but so that the regeneration of this device and absorption one after the other work, this means that this device can process ammonia-containing exhaust continuously.
Described the tenth pipeline 710 is provided with the 11 pipeline 711, the 11 pipelines 711 in parallel and is provided with the 9th valve 909; The second purifying regeneration passage 801 entrance ends of described the second purifier 800 connect the second regeneration tail gas delivery pipe 1001, and described the second regeneration tail gas delivery pipe 1001 is provided with the tenth valve 910; Consist of the second regeneration system rapidly by hydrogen nitrogen mixed gas delivery pipe 600, the 11 pipeline 711, the second purifying regeneration passage 801 and the second regeneration tail gas delivery pipe 1001.
Also comprise the second heat tunnel 803 in described the second purifier 800; Described the second purifying regeneration passage 801 and the second heat tunnel 803 are not communicated with mutually; Described the 3rd pipeline 703 is connected with the second heat tunnel 803 entrance ends with the 12 pipeline 712 by the 7th pipeline 707 and communicates; Described the second heat tunnel 803 exit end are connected with the entrance end of water cooler 400 by the 13 pipeline 713 and communicate; Described the 13 pipeline 713 is provided with the 11 valve 911.Therefore, the second heat tunnel 803 in described the 7th pipeline 707, the 12 pipeline 712, the second purifier 800, the 13 pipeline 713 form the second heating system.After 800 work for some time of the second purifier, the molecular sieve 802 in it has adsorbed after the more impurity or ammonia, and adsorption function will progressively weaken, and at this moment needs to carry out it is regenerated; After ammonia in the ammonia destruction furnace 300 decomposes, about 350 ℃ of the temperature of the hydrogen nitrogen mixed gas that obtains after interchanger 200 heat exchange; The regeneration temperature (250～350 ℃) that this temperature is just in time mated molecular sieve 802 that is to say, after the heat exchange hydrogen nitrogen mixed gas with waste heat can be used for the regeneration of molecular sieve 802.
Be provided with some tubulations in described the second purifier 800, this tubulation is as the second heat tunnel 803; Outer the second purifier 800 interior spaces of described tubulation form the second purifying regeneration passage 801.Heat to molecular sieve 802 by tubulation with hydrogen nitrogen mixed gas, to utilize fully the waste heat of hydrogen nitrogen mixed gas, reduce energy consumption.This is different from the structure of existing purifier, and existing purifier all adopts electric heater to heat to molecular sieve, means extra energy consumption.
Paste adiabatic heat-insulation sealing coat 804 on described the second purifier 800 outer walls, to reduce energy waste.
A kind of energy-saving method for preparing high pure hydrogen nitrogen mixed gas of said apparatus of utilizing comprises the steps:
1) ammonia decomposes: the ammonia of room temperature (about 20 ℃) is warming up to more than 700 ℃ after by interchanger 200 interconnection heat exchange, then enter ammonia destruction furnace 300, ammonia further is heated to 750～850 ℃ in that ammonia destruction furnace 300 is interior, in heat temperature raising, ammonia contacts with ammonia decomposition catalyzer and is broken down into hydrogen nitrogen mixed gas; Be cooled to large 300～400 ℃ after the vertical passage heat exchange of this hydrogen nitrogen mixed gas by interchanger 200; The outer wall of described interchanger 200 and ammonia destruction furnace 300 is provided with thermal insulating warm-keeping layer;
2) the first purifier is purified, the regeneration of the second purifier;
Open the first valve 901, the second valve 902, the 3rd valve 903, the 8th valve 908, the tenth valve 910 and the 11 valve 911; Close the 4th valve 904, the 5th valve 905, the 6th valve 906, the 7th valve 907 and the 9th valve 909;
300～400 ℃ hydrogen nitrogen mixed gas are transported to water cooler 400 are cooled to 20～30 ℃, then in the 4th pipeline 704 was transported to the first purifying regeneration passage 501 of the first purifier 500, molecular sieve 502 purifying in this passage were transported to hydrogen nitrogen mixed gas delivery pipe 600 by the 5th pipeline 705; What described the first purifying was regenerated passage 501 interior fillings is the 5A molecular sieve;
With the gas product in the hydrogen nitrogen mixed gas delivery pipe 600 in the tenth pipeline 710 is transported to the second purifying regeneration passage 801 of the second purifier 800, molecular sieve 802 is purged, take the impurity on the molecular sieve 802 out of, resurgent gases is discharged through the second regeneration tail gas delivery pipe 1001; Meanwhile, 300～400 ℃ hydrogen nitrogen mixed gas in the 7th pipeline 707, the 12 pipeline 712 are transported to the second heat tunnel 803 of the second purifier 800, are heated by the molecular sieve 802 in 803 pairs of the second purifying regeneration of the second heat tunnel passage 801; Hydrogen nitrogen mixed gas after the heating is transported to the entrance end of water cooler 400 through the 13 pipeline 713; Described the second heat tunnel 803 is some tubulations;
3) the second purifier is purified, the regeneration of the first purifier;
Open the first valve 901, the 4th valve 904, the 5th valve 905, the 6th valve 906, the 7th valve 907 and the 8th valve 908; Close the second valve 902, the 3rd valve 903, the 9th valve 909, the tenth valve 910 and the 11 valve 911;
300～400 ℃ hydrogen nitrogen mixed gas are transported to water cooler 400 are cooled to 20～30 ℃, then in the 9th pipeline 709 was transported to the second purifying regeneration passage 801 of the second purifier 800, molecular sieve 802 purifying in this passage were transported to hydrogen nitrogen mixed gas delivery pipe 600 by the tenth pipeline 710; What described the second purifying was regenerated passage 801 interior fillings is the 5A molecular sieve;
With the gas product in the hydrogen nitrogen mixed gas delivery pipe 600 in the 6th pipeline 706 is transported to the first purifying regeneration passage 501 of the first purifier 500, molecular sieve 502 is purged, take the impurity on the molecular sieve 502 out of, resurgent gases is discharged through the first regeneration tail gas delivery pipe 1000; Meanwhile, 300～400 ℃ hydrogen nitrogen mixed gas in the 7th pipeline 707 is transported to the first heat tunnel 503 of the first purifier 500, are heated by the molecular sieve 502 in 503 pairs of the first purifying regeneration of the first heat tunnel passage 501; Hydrogen nitrogen mixed gas after the heating is transported to the entrance end of water cooler 400 through the 8th pipeline 708; Described the first heat tunnel 503 is some tubulations;
4) step 2) and step 3) move in circles continuous continual preparation high pure hydrogen nitrogen mixed gas product.
In a word, this installs whole energy consumptions is exactly the required heating power consumption of ammonia destruction furnace, is mainly used in ammonia and is heated to 750～850 ℃ and ammonia from 700 ℃ and decomposes as the required energy of thermo-negative reaction.This device finally can be accomplished: make the required energy consumption of one cubic metre of high pure hydrogen nitrogen mixed gas below 0.5 kilowatt-hour, the purity of the hydrogen nitrogen mixed gas of acquisition is more than 99.999%, and the pressure of hydrogen nitrogen mixed gas can reach 1.5～10 normal atmosphere.
Obviously, above-described embodiment of the present utility model only is for the utility model example clearly is described, and is not to be restriction to embodiment of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here can't give all embodiments exhaustive.Everyly belong to the row that apparent variation that the technical solution of the utility model extends out or change still are in protection domain of the present utility model.
Claims (9)
1. energy-saving ammonia decomposes the device that obtains high pure hydrogen nitrogen mixed gas, it is characterized in that: comprise ammonia input tube, interchanger, ammonia destruction furnace, water cooler, the first purifier and hydrogen nitrogen mixed gas delivery pipe;
Described interchanger is divided into interconnection and vertical passage, and described interconnection and vertical passage are not communicated with mutually;
Described ammonia input tube is connected with the interconnection entrance end of interchanger and communicates, the interconnection exit end of described interchanger is connected with the ammonia destruction furnace entrance end by the first pipeline and communicates, the exit end of described ammonia destruction furnace is connected with interchanger vertical passage entrance end by second pipe and communicates, and described interchanger vertical passage exit end is connected with the water cooler entrance end by the 3rd pipeline and communicates;
Comprise the first purifying regeneration passage in described the first purifier, be provided with molecular sieve in described the first purifying regeneration passage;
The exit end of described water cooler is connected by the 4th pipeline and the first purifying regeneration channel entrance end and communicates;
Described the first purifying regeneration channel outlet connects the hydrogen nitrogen mixed gas delivery pipe by the 5th pipeline.
2. device according to claim 1 is characterized in that: be covered with thermal insulating warm-keeping layer on described interchanger and the ammonia destruction furnace outer wall.
3. device according to claim 1 is characterized in that: described the 5th pipeline is provided with the 6th pipeline in parallel; The first purifying regeneration channel entrance end of described the first purifier connects the first regeneration tail gas delivery pipe; Described the 3rd pipeline is provided with the first valve, and described the 4th pipeline is provided with the second valve, and described the 5th pipeline is provided with the 3rd valve, and described the 6th pipeline is provided with the 4th valve, and described the first regeneration tail gas delivery pipe is provided with the 5th valve.
4. device according to claim 3 is characterized in that: also comprise the first heat tunnel in described the first purifier; Described the first purifying regeneration passage and the first heat tunnel are not communicated with mutually; Described the 3rd device for cleaning pipeline is crossed the 7th pipeline and is connected with the first heat tunnel entrance end and communicates; Described the first heat tunnel exit end is connected with the entrance end of water cooler by the 8th pipeline and communicates; Described the 8th pipeline is provided with the 6th valve.
5. device according to claim 4, it is characterized in that: be provided with some tubulations in described the first purifier, this tubulation is as the first heat tunnel; The outer interior space of the first purifier of described tubulation forms the first purifying regeneration passage.
6. arbitrary described device according to claim 1-5 is characterized in that: paste the adiabatic heat-insulation sealing coat on described the first purifier outer wall.
7. device according to claim 6, it is characterized in that: described device also comprises the second purifier, comprises the second purifying regeneration passage in described the second purifier; Be provided with molecular sieve in described the second purifying regeneration passage; The exit end of described water cooler is connected by the 9th pipeline and the second purifying regeneration channel entrance end and communicates, and described the 9th pipeline is provided with the 7th valve; Described the second purifying regeneration channel outlet connects the hydrogen nitrogen mixed gas delivery pipe by the tenth pipeline, and described the tenth pipeline is provided with the 8th valve.
8. device according to claim 7 is characterized in that: described the tenth pipeline is provided with the 11 pipeline in parallel, and the 11 pipeline is provided with the 9th valve; The second purifying regeneration channel entrance end of described the second purifier connects the second regeneration tail gas delivery pipe, and described the second regeneration tail gas delivery pipe is provided with the tenth valve; Consist of the second regeneration system rapidly by hydrogen nitrogen mixed gas delivery pipe, the 11 pipeline, the second purifying regeneration passage and the second regeneration tail gas delivery pipe.
9. device according to claim 8 is characterized in that: also comprise the second heat tunnel in described the second purifier; Described the second purifying regeneration passage and the second heat tunnel are not communicated with mutually; Described the 3rd device for cleaning pipeline is crossed the 7th pipeline and is connected with the second heat tunnel entrance end with the 12 pipeline and communicates; Described the second heat tunnel exit end is connected with the entrance end of water cooler by the 13 pipeline and communicates; Described the 13 pipeline is provided with the 11 valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205906057U CN202880860U (en) | 2012-11-09 | 2012-11-09 | Energy-saving device for preparing high-purity hydrogen/nitrogen mixed gas through ammonia decomposition |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012205906057U CN202880860U (en) | 2012-11-09 | 2012-11-09 | Energy-saving device for preparing high-purity hydrogen/nitrogen mixed gas through ammonia decomposition |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102910580A (en) * | 2012-11-09 | 2013-02-06 | 湖南高安新材料有限公司 | Energy-saving device and method for decomposing ammonia to prepare high-purity hydrogen-nitrogen mixture gas |
-
2012
- 2012-11-09 CN CN2012205906057U patent/CN202880860U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102910580A (en) * | 2012-11-09 | 2013-02-06 | 湖南高安新材料有限公司 | Energy-saving device and method for decomposing ammonia to prepare high-purity hydrogen-nitrogen mixture gas |
| CN102910580B (en) * | 2012-11-09 | 2015-03-11 | 湖南高安新材料有限公司 | Energy-saving device and method for decomposing ammonia to prepare high-purity hydrogen-nitrogen mixture gas |
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