CN201613104U - Decompression zero-emission energy-saving gas dehydrator - Google Patents
Decompression zero-emission energy-saving gas dehydrator Download PDFInfo
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- CN201613104U CN201613104U CN2010201067788U CN201020106778U CN201613104U CN 201613104 U CN201613104 U CN 201613104U CN 2010201067788 U CN2010201067788 U CN 2010201067788U CN 201020106778 U CN201020106778 U CN 201020106778U CN 201613104 U CN201613104 U CN 201613104U
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- renewing
- circulating fan
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Abstract
The utility model relates to a decompression zero-emission energy-saving gas dehydrator, which is adaptable to medium-high pressure (larger than 2.0MPa) molecular sieve dehydrating technique with two towers or a plurality of towers. The decompression zero-emission energy-saving gas dehydrator comprises a filter (1), two or more than two drying/absorbing tower (2A, 2B), an air cooler (3), a gas-water separator (4), a circulating fan (5), an electric heater (6), a gas-gas heat exchanger (8) and a frequency converter (12). The decompression zero-emission energy-saving gas dehydrator is characterized in that a renewing discharge branch is arranged at a gas outlet of the circulating fan in a branched manner, the renewing discharge branch is combined with an absorption gas inlet pipe, therefore, dry gas emitted by a renewing loop can be pumped out during renewing and be discharged into an absorption loop so as to decompress a renewing tower, after decompression, the renewing loop can be restored by switching a valve, thereby decompression renewing is realized and zero emission is realized too, renewing time is reduced so as to reduce energy consumption, and service life of a molecular sieve is prolonged.
Description
Technical field
The utility model relates to a kind of from mist (natural gas, coal bed gas, oil field gas, oven gas, coal gas, CO gas during carbon back is synthetic, H in the petrochemical industry
2Gas, food-class CO
2Deng) in remove the gas dewatering device of water, particularly a kind of energy-saving gas dewatering device of pressure-reduction zero-emission.It is applicable to middle and high pressure (＞2.0Mpa) double tower or multitower molecular sieve absorption dewatering process.
Background technology
At present, the double-column process technology of a kind of isobaric zero-emission of the industrial normal employing of the processed of mist (as: natural gas).During work, a tower absorption, another tower regeneration, after absorption was saturated, the absorption tower transferred regeneration immediately to, and regenerator transfers absorption immediately to, and dehydration is carried out continuously.Wherein absorption process using is a molecular sieve absorption flow process, and what regeneration technology adopted is hot regeneration technology flow process, and it makes the molecular sieve that is filled moisture obtain desorb with the method for thermal evaporation.Referring to Fig. 2, its absorption flow process is: mist is through the filtration of filter 100, enter the tower from the cat head of absorption tower 200A through valve 10A from air inlet pipe 900, discharge from the tower still through the molecular sieve in the tower again, mist is by molecular sieve the time, moisture wherein is adsorbed, and can satisfy the dehydration requirement, and the gas of discharging from the tower still goes out device through valve 30A, escape pipe 1100 and filter 700.The regeneration technology flow process is: drying tower 200B uses the heat temperature raising of the extraneous mist of sending here that has dewatered (or moisture trap 400 come out dry gas) through electric heater 600, enter the tower from the tower still of drying tower 200B through valve 40B, make the water evaporates of molecular sieve adsorption in the tower and take out of, the damp-heat that evaporates is discharged from cat head, enter gas/gas heat exchanger 800 through valve 20B, the cold dry gas that comes out with moisture trap 400 changes cold cooling, enter air cooler 300 then and continue cooling, make the moisture content in the gas be condensed into droplet, pass through the gas-water separation of moisture trap 400 again, with condensed moisture from and discharge, fixed gas enters gas/gas heat exchanger 800 through the pressurization of circulating fan 500, after the hot and humid gas heat exchange of coming out with drying tower 200B cat head heats up, enter electric heater 600, through the heating of electric heater 600, make gas temperature reach the temperature requirement of molecular sieve desorb after, enter drying tower 200B through valve 40B, form circulation, constantly circulation, the moisture in the molecular sieve is by desorb.
Above-mentioned technological process is a kind of isobaric technique of zero discharge flow process, i.e. the pressure of absorption and desorb is identical, and non-exhaust emission.This isobaric technique of zero discharge only is applicable to conventional pressure (20kPa) operating mode, but absorption pressure (greater than 2.0MPa) for middle and high pressure, if still adopt isobaric desorb, it is a lot (because pressure is high more that desorption temperature is raise, the boiling temperature of water is high more), this not only can increase energy consumption, also can reduce the service life of molecular sieve, and can make desorption time long, if desorption time is long, also need to increase absorption or drying tower comes balance absorption and desorption time, thereby cause that investment increases.Therefore, how in zero-emission, can step-down regeneration be the problem that needs solution at present again.
Summary of the invention
The purpose of this utility model is at the problem that exists in the prior art, and a kind of energy-saving gas dewatering device that is applicable to the pressure-reduction zero-emission of middle and high pressure absorption working condition is provided, and saves the energy and prolongs the molecular sieve purpose in service life thereby reach.
For achieving the above object, the technical solution of the utility model is as follows:
It is at least by two or more dryings/absorption tower, air cooler, moisture trap, circulating fan, electric heater, gas/gas heat exchanger is formed, the cat head fairlead of described each drying/adsorption tower is divided into two-way, the valve of leading up to is incorporated the charging tracheae into, another road is also incorporated the total fairlead of cat head into by a valve, the hot gas air inlet pipe of total fairlead of described cat head and gas/gas heat exchanger is joined, the hot gas escape pipe of gas/gas heat exchanger and the air inlet pipe of air cooler are joined, the escape pipe of described air cooler and the air inlet pipe of moisture trap are joined, and the escape pipe of described moisture trap and the air inlet pipe of circulating fan are joined; The tower still fairlead of described each drying/adsorption tower also is divided into two-way, the valve of leading up to is incorporated the discharging tracheae into, the escape pipe of electric heater is also incorporated on another road into by a valve, the cold air escape pipe of the air inlet pipe of heater and gas/gas heat exchanger joins, it improves structure: the escape pipe of described circulating fan is divided into two-way, the cold air air inlet pipe of a valve and gas/gas heat exchanger of leading up to is joined, and another road is also incorporated the charging tracheae into by a valve.
The further improved technical scheme of the utility model is as follows:
On the described circulating fan frequency converter is housed.
By technique scheme as can be seen, the utility model is at a regeneration discharging of the gas outlet of circulating fan punishment expenditure branch road, and the discharging branch road of should regenerating is incorporated the absorption air inlet pipe into.Like this, the dry gas pressurization that can when regeneration regenerative circuit be discharged is extracted out and is discharged to the absorption loop, makes the regenerator step-down after the step-down, by the switching of valve, to recover regenerative circuit again.Like this, both realized step-down regeneration, realized zero-emission again, thereby reduced energy consumption, and also avoided making the molecular sieve lost of life, prolonged the service life of molecular sieve because of regeneration temperature is too high.The utility model realizes that further the scheme of top-operation is to add frequency converter on circulating fan, when the regeneration beginning, make circulating fan quicken the gas in the regenerative circuit is extracted out by VFC, realize step-down, and after the regenerative circuit step-down, controlling circulating fan again runs slowly, enter the regular regeneration circulation, thereby reduce the recovery time.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the structural representation of isobaric zero-emission double tower molecular sieve gas dewatering device.
The specific embodiment
Still double-column process is structure and the operation principle that example illustrates this device below.
Referring to Fig. 1, it comprises two dryings/ absorption tower 2A, 2B, air cooler 3, moisture trap 4, circulating fan 5, electric heater 6 gentle/gas heat exchangers 8, two drying/adsorption tower 2A, the cat head fairlead of 2B is divided into two-way, the first via of tower 2A is incorporated charging tracheae 9 into by valve 1A, the first via of tower 2B is also incorporated charging tracheae 9 into by valve 1B, the second tunnel of tower 2A incorporates the total fairlead 10 of cat head into by valve 2A, the second tunnel of tower 2B incorporates total fairlead 10 into by valve 2B, the total fairlead 10 of described cat head joins with the hot gas air inlet pipe of gas/gas heat exchanger 8, the hot gas escape pipe of gas/gas heat exchanger and the air inlet pipe of air cooler 3 are joined, the air inlet pipe of the escape pipe of described air cooler and moisture trap 4 is joined, the air inlet pipe of the escape pipe of described moisture trap 4 and circulating fan 5 is joined, the escape pipe of described circulating fan 5 is divided into two-way, the cold air air inlet pipe of valve 7A and gas/gas heat exchanger 8 of leading up to is joined, and another road is incorporated charging tracheae 9 into by valve 7B; The tower still fairlead of two drying/ adsorption tower 2A, 2B also is divided into two-way, the first via of tower 2A is incorporated discharging tracheae 11 into by valve 3A, the first via of tower 2B is incorporated discharging tracheae 11 into by valve 3B, the second tunnel of tower 2A incorporates the escape pipe of electric heater 6 into by valve 4A, the second tunnel of tower 2B incorporates the escape pipe of electric heater 6 into by valve 4B, and the cold air escape pipe of the air inlet pipe of heater 6 and gas/gas heat exchanger 8 joins.
On the described circulating fan 5 frequency converter 12 is housed, change the rotating speed of circulating fan 5 by the frequency change of controlling this frequency converter, make its quick rotation when the regeneration beginning, discharge gas fast, make the quick step-down of regenerator, when recovering regular regeneration, slow down again, make circulating fan output normal circulation thrust, further energy-conservation.
The workflow of this device is as follows:
Suppose device is in the state of tower 2A absorption, tower 2B regeneration, then opens cat head valve 1A, 2B, closes cat head valve 1B, 2A; Open tower still valve 3A, 4B, close tower still valve 4A, 3B;
In the absorption process, mist filters by filter 1, droplet is wherein filtered, enter tower 2A by valve 1A then, gas passes the molecular sieve in the tower, makes moisture in the gas by molecular sieve adsorption, comes out from the tower still then, go out device by valve 3A and filter 13, finish the absorption process.
When the regeneration beginning, valve 7B opens, valve 7A closes, at this moment, the damp-heat that tower 2B cat head comes out is by valve 2B, gas/gas heat exchanger 8, air cooler 3, become cold dry gas behind the moisture trap 4, pressurize by circulating fan 5 frequency conversions then, quicken to enter charging tracheae 9 by valve 7B, the feed gas of this gas that enters in the charging tracheae passes through discharger behind the absorption tower 2A, constantly circulation is discharged, pressure among the drying tower 2B is descended, when pressure drops to the pressure that the molecular sieve desorb is fit to (and require with reference to energy consumption), being about to valve 7B closes, and valve 7A is opened, simultaneously, circulating fan 5 frequency conversions are slowed down, can promote the speed average rate operation of gas circulation, at this moment, the damp-heat that tower 2B cat head is discharged enters heat exchanger 8 by valve 2B, the cold dry gas that comes out with circulating fan changes cold, this is equivalent to carry out a precooling before air cooling, enter air cooler 3 coolings then, after the cooling, the moisture content in the damp-heat is condensed into droplet, pass through the separation of moisture trap 4 again, the separated discharging of the droplet of condensation in the gas, the cold dry gas that does not coagulate enters heat exchanger 8 through valve 7A again through the pressurization of circulating fan 5, the damp-heat heat exchange of coming out with tower 2B cat head, this is equivalent to carry out a preheating before electrical heating, and then enters 6 heating of electric pressurizer, be heated to molecular sieve desorption temperature after valve 4B enter the tower from the tower still of tower 2B, hot drying gas passes the molecular sieve in the tower, with water evaporation in the molecular sieve, discharge damp-heat from cat head, form circulation.When the water in the molecular sieve is separated the value that is drawn onto technological requirement, by the switching of valve, make tower 2B transfer absorption to, tower 2A transfers regeneration to, and so circulation is carried out dehydration process continuously.
If the treating capacity of gas is bigger, can extend to multi-tower structures such as four towers, six towers, eight towers with reference to Double-Tower Structure, promptly the tower of partial amt is made as absorption, and the tower of partial amt is made as regeneration.If the absorption time is long, the recovery time is short, be made as regeneration to tower of major general, and all the other all is made as absorption, and regenerative process is carried out between multitower successively by turns, can realize the function of above-mentioned continuous dehydration equally.
The mist that the utility model is handled comprises natural gas, coal bed gas, oil field gas, oven gas, coal gas, CO gas during carbon back is synthetic, H in the petrochemical industry
2Gas, food-class CO
2Deng.Wherein coal gas is if middle calorific value town gas then wherein contains methyl alcohol, because usually need go here and there the synthesizing methanol operation for the calorific value of calorific value town gas in improving in gas-making process, therefore, coal gas will be with water in the gas, methanol stripper before being sent to the user.In the time of the dehydration of the utility model centering calorific value of gas, also can be with methanol stripper.
Claims (2)
1. the energy-saving gas dewatering device of a pressure-reduction zero-emission, it is at least by two or more dryings/absorption tower (2A, 2B), air cooler (3), moisture trap (4), circulating fan (5), electric heater (6), gas/gas heat exchanger (8) is formed, the cat head fairlead of described each drying/adsorption tower is divided into two-way, the valve (1A or 1B) of leading up to is incorporated charging tracheae (9) into, another road is also incorporated the total fairlead of cat head (10) into by a valve (2A or 2B), the total fairlead of described cat head (10) joins with the hot gas air inlet pipe of gas/gas heat exchanger (8), the air inlet pipe of the hot gas escape pipe of gas/gas heat exchanger and air cooler (3) is joined, the air inlet pipe of the escape pipe of described air cooler and moisture trap (4) is joined, and the air inlet pipe of the escape pipe of described moisture trap (4) and circulating fan (5) is joined; The tower still fairlead of described each drying/adsorption tower also is divided into two-way, the valve (3A or 3B) of leading up to is incorporated discharging tracheae (11) into, another road is also incorporated the escape pipe of electric heater (6) into by a valve (4A or 4B), the cold air escape pipe of the air inlet pipe of heater (6) and gas/gas heat exchanger joins, it is characterized in that: the escape pipe of described circulating fan (5) is divided into two-way, the valve (7A) of leading up to joins with the cold air air inlet pipe (9) of gas/gas heat exchanger (8), and another road is also incorporated charging tracheae (9) into by a valve (7B).
2. the energy-saving gas dewatering device of pressure-reduction zero-emission according to claim 1 is characterized in that: frequency converter (12) is housed on the described circulating fan (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201067788U CN201613104U (en) | 2010-02-02 | 2010-02-02 | Decompression zero-emission energy-saving gas dehydrator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201067788U CN201613104U (en) | 2010-02-02 | 2010-02-02 | Decompression zero-emission energy-saving gas dehydrator |
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| CN201613104U true CN201613104U (en) | 2010-10-27 |
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| CN2010201067788U Expired - Lifetime CN201613104U (en) | 2010-02-02 | 2010-02-02 | Decompression zero-emission energy-saving gas dehydrator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101797465B (en) * | 2010-02-02 | 2012-07-25 | 陕西高芯超滤膜科技有限责任公司 | Pressure-reduction zero-emission energy-saving gas dewatering device |
| CN109045935A (en) * | 2018-08-16 | 2018-12-21 | 邯郸钢铁集团有限责任公司 | A kind of method that the pressure of compressed-air drier filtrate is lived again |
-
2010
- 2010-02-02 CN CN2010201067788U patent/CN201613104U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101797465B (en) * | 2010-02-02 | 2012-07-25 | 陕西高芯超滤膜科技有限责任公司 | Pressure-reduction zero-emission energy-saving gas dewatering device |
| CN109045935A (en) * | 2018-08-16 | 2018-12-21 | 邯郸钢铁集团有限责任公司 | A kind of method that the pressure of compressed-air drier filtrate is lived again |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Xi'an Hyperfiltration Chemical Co., Ltd. Assignor: Shaanxi High Core Ultrafiltration Membrane Science and Technology Co.,Ltd. Contract record no.: 2012610000046 Denomination of utility model: Pressure-reduction zero-emission energy-saving gas dewatering device Granted publication date: 20101027 License type: Exclusive License Record date: 20120419 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20101027 Effective date of abandoning: 20120725 |