CN201517766U - Steam generator for natural gas hydrogen production plant - Google Patents
Steam generator for natural gas hydrogen production plant Download PDFInfo
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- CN201517766U CN201517766U CN2009203111975U CN200920311197U CN201517766U CN 201517766 U CN201517766 U CN 201517766U CN 2009203111975 U CN2009203111975 U CN 2009203111975U CN 200920311197 U CN200920311197 U CN 200920311197U CN 201517766 U CN201517766 U CN 201517766U
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- preheater
- natural gas
- steam generator
- steam
- saturated vapor
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Abstract
The utility model discloses a steam generator for natural gas hydrogen production plant, which is object to resolve the problem that the existing steam generator has high cost, large fabrication cost and low produced steam pressure. The steam generator includes a combustor, a steam generating device, and an smoke canal, wherein the steam generating device includes a superheated steam preheater and a saturated steam preheater, the high-temperature flue gas generated by the combustor transfers heat to the superheated steam preheater and the saturated steam preheater in sequence through the smoke canal. Compared with the existing steam generator, the utility model has lower fabrication cost, and the produced steam pressure can fully meet the requirement of the natural gas hydrogen production plant to raw materials.
Description
Technical field
The utility model relates to the steam generator that a kind of natural gas hydrogen preparation device is used.
Background technology
The natural gas hydrogen preparation device is meant under the condition of high temperature, high pressure, with natural gas, casing-head gas, oven gas, refinery exhaust or light oil is raw material, by the effect of nickel-base catalyst in the reformer tube, impel unstripped gas and steam to carry out the chemical plant installations that syngas for synthetic ammonia (being hydrogen) produced in conversion reaction in reformer tube inside.
Produce the technological requirement of hydrogen according to natural gas steam reforming, need unstripped gas before mixing, just to be pressurized to respectively about 2.0MPa (A) with steam, mixing the back reacts under the high temperature of the pressure of 2.0～4.0MPa (A) and 700～800 ℃, this requires the natural gas hydrogen preparation device to possess special satisfy steam raising plant that natural gas hydrogen preparation pressure requires or steam pressurized equipment (at possessing production steam, but steam pressure can not satisfy natural gas hydrogen preparation the pressure of steam being required).The device run duration, the waste heat boiler that available apparatus carries comes retracting device heat energy, produces steam, but when equipment just brings into operation, just needs independently steam raising plant.
Polytype steam generator is now arranged both at home and abroad, a kind of is to adopt heat carrier (as deep fat) to produce steam as thermal source, and operation principle is: deep fat partly for high temperature heat conductive oil by hot oil pump or directly enter in the tube bank of steam generator by heat medium heater.In the pipe heat with the certain flow temperature by tube wall with heat transferred pipe outer pot water, with water heating, conduction oil is lowered the temperature, and comes back to heating furnace, makes it to recycle, steam generator is used demineralized water, if can through preheating then evaporation capacity can improve.Water enters evaporimeter from the bottom, water heats under free convection produce steam on heating surface, by orifice plate and equal steam vent plate become unsaturated steam under water, deliver to the branch drum, provide production, gas for domestic use, but this high-temperature steam pressure that with the deep fat is the steam generator of heat carrier produces has only 0.8～1.0MPa (A), the steam under this pressure can't satisfy the needs of natural gas hydrogen preparation device, and the price height can increase installation cost to a great extent; Another is for being the steam generator of the energy with the electric energy, this be a kind of by the heating heating water in closed container to produce the steam generating equipment of certain pressure. it is little to have a volume. pollution-free. Automatic Control. safe and reliable. use characteristics such as flexible, such steam generating equipment possesses the high characteristics of cost equally, and owing to use electric energy, in the natural gas hydrogen preparation device, to pay special attention to explosion-proof problem, antiknock device and device to be additionally increased, certain cost can be increased again.The pressure that this steam generator of two types produces is 1.0MPa (A) once, also must increase the steam pressurized device and can satisfy the requirement of natural gas hydrogen preparation to the steam of one of raw material, and vapor (steam) temperature is limited.
The utility model content
The purpose of this utility model is: solve the low problem of steam pressure that existing steam generator cost height, cost are big, produce, a kind of improved steam generator that has is provided, compare with existing steam generator, cost steam pressure lower, that produce also can satisfy the requirement of natural gas hydrogen preparation device to the raw water steam fully.
The purpose of this utility model realizes by following technical proposals:
A kind of natural gas hydrogen preparation device steam generator, comprise burner and steam generation device, also comprise flue, described steam generation device comprises superheated steam preheater and saturated vapor preheater, and the high-temperature flue gas that described burner generates transmits heat to superheated steam preheater, saturated vapor preheater successively by flue.
The nearly port of export is provided with air preheater in the described flue.
Described flue inwall is coated with refractory insulating layer.
Described burner body is provided with from inlet scoop and combustion air forced air supply mouth.
The saturated vapor outlet of described saturated vapor preheater is communicated with the import of superheated steam preheater.
Described superheated steam preheater is arranged on the nearly arrival end in the flue.
Described superheated steam preheater is made of the spiral coil that heat exchanger tube is bent into.
Described saturated vapor preheater comprises upper header and the lower collecting box that is communicated with by pipeline, and wherein upper header is respectively arranged with boiler water import and saturated vapor outlet, and lower collecting box is provided with liquid outlet; The bottom of upper header is communicated with lower collecting box by the boiler water down-comer, and the top of lower collecting box is communicated with upper header by vapor uptake.
Described air preheater by air intake duct, with air intake duct intersect the air intlet manifold trunk that is communicated with, many groups and air intlet manifold trunk intersect the heat exchanger tube that is communicated with, the preheated air manifold trunk that is communicated with the heat exchanger tube other end, intersect the preheated air outlet that is communicated with the preheated air manifold trunk and constitute.
Also be provided with relief valve connection, interface of the level gauge and pressure gauge connection on the upper header of described saturated vapor preheater.
The utility model adopts segmentation to utilize the gas fume after burning heat, flue gas is earlier via the superheated steam preheater, again via the saturated vapor preheater, again via air preheater, and boiler water heats in the saturated vapor preheater earlier, heat by the superheated steam preheater again, and air preheater is used for the required air of pre-thermal response, can improve the heat energy utilization rate of whole steam generator, and the saturated vapor preheater can be the boiler water preheating saturated vapor under the whole system pressure, continues to be heated to be superheated steam by the superheated steam preheater again, with after raw natural gas mixes, the temperature of gaseous mixture satisfies the temperature conditions of entire reaction again.
Description of drawings
The utility model will illustrate by example and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is the structural representation of steam generator of the present utility model;
Fig. 2 is the structural representation of the air preheater in the utility model:
Fig. 3 is the structural representation of the saturated vapor preheater in the utility model;
Number in the figure: the 1st, flue damper, the 2nd, chimney, the 3rd, flue, the 4th, air preheater, the 401st, heat exchanger tube, the 402nd, the air intlet manifold trunk, the 403rd, air intake duct, the 404th, the preheated air manifold trunk, the 405th, the preheated air outlet, the 5th, refractory insulating layer, the 6th, the saturated vapor preheater, the 601st, the float level meter interface, the 602nd, the saturated vapor outlet, the 603rd, upper header, the 604th, relief valve connection, the 605th, pressure gauge connection, the 606th, the boiler water import, the 607th, the boiler water down-comer, the 608th, vapor uptake, the 609th, lower collecting box, the 610th, liquid outlet, the 7th, support, the 8th, the superheated steam outlet, the 9th, burner, the 10th, fuel gas inlet, the 11st, the burner lighting-up tuyere, the 12nd, the combustion air inlet, the 13rd, the superheated steam preheater, the 14th, the fluid level control device of upper header.
The specific embodiment
Below in conjunction with drawings and Examples the utility model is further described.
As shown in Figure 1, the steam generator that the natural gas hydrogen preparation device is used comprises burner 9 and steam raising plant, and steam raising plant comprises the saturated vapor preheater 6 and the superheated steam preheater 13 of cascade successively.
As shown in Figure 1, offer on the body of burner 9, be respectively arranged with fuel gas inlet 10, combustion air inlet 12 and burner lighting-up tuyere 11 on the inlet duct of burner 9 from the inlet scoop (not shown in figure 1).The smoke outlet of burner 9 is communicated with the arrival end of flue 3.
Superheated steam preheater 13 is arranged on the nearly arrival end place in the flue 3, the steam inlet of superheated steam preheater 13 is communicated with the saturated vapor outlet 602 of saturated vapor preheater 6, the saturated vapor that was heated by saturated vapor preheater 6 is discharged by the superheated steam outlet 8 of superheated steam preheater 13 after being entered superheated steam preheater 13 and continued heating by saturated vapor outlet 602.
In flue 3, the heat exchanger components of saturated vapor preheater 6 is positioned at the rear of superheated steam preheater 13, and promptly high-temperature flue gas is first through superheated steam preheater 13, again through supersaturated vapor preheater 6 in flue 3; See Fig. 1, in flue 3, air preheater 4 is positioned at the rear of saturated vapor preheater 6.
From Fig. 1 as seen, the end of flue 3 is provided with chimney 2 and is communicated with it, and the outer end of chimney 2 is provided with flue damper 1, enters in the flue 3 to prevent rainwater or other impurity.
The structure of air preheater 4 as shown in Figure 2, by air intake duct 403, with air intake duct 403 intersect the air intlet manifold trunk 402 that is communicated with, many groups and air intlet manifold trunk 402 intersect the heat exchanger tube 401 that is communicated with, the preheated air manifold trunk 404 that is communicated with heat exchanger tube 401 other ends, intersect the preheated air outlet 405 that is communicated with preheated air manifold trunk 404 and constitute.Intersection in the present embodiment is communicated with to be meant between two pipelines it is not the structure that is communicated with successively end to end, but a pipeline is communicated with the body middle part of another root pipeline, both are angle and arrange, one preferred embodiment then is that both are perpendicular to one another, air intake duct 403 as shown in Figure 2 is communicated with the middle part of air intlet manifold trunk 402, and both communicate in square crossing.Air intlet manifold trunk 402 is similar with it with the connectivity structure of many group heat exchanger tubes 401, wherein has at least heat exchanger tube 401 to be positioned at flue 3, participates in exchange heat.
As shown in Figure 1, the air-flow directions in the air preheater 4 are to go out under enterprising, and are promptly opposite with flue gas, the heat exchange mode of this reverse flow can increase the heat exchange effect effectively, this group air preheater has 7 heat exchanger tubes 401, is positioned in the flue 3, and material is a common stainless steel.
As shown in Figure 3, saturated vapor preheater 6 comprises upper header 603, and heat exchanger tube and lower collecting box 609 are with 603 and some other annexes.
Lower collecting box 609 comprises a horizontal vessel and the liquid outlet 610 that is communicated with this container.
The fluid level control device that is provided with on upper header 603 tops is used for controlling the liquid level of upper header 603, because this liquid level index is very important during for the normal operation of steam generator, if liquid level is crossed low or upper header 603 interior aneroids will make saturated vapor preheater 6 be in the state of " dry combustion method ", this situation will be breakneck to this group preheater.The pressure of whole saturated vapor preheater 6 is controlled by safety valve, and can directly read the force value of saturated vapor preheater 6 by Pressure gauge.
Superheated steam preheater 13 is to have a heat exchanger tube to become spiral coil through bending, whole spiral coil is all in flue 3, saturated vapor import and superheated steam outlet 8 are all in flue 3 outsides, by saturated vapor outlet 602 saturated vapors that come out from the steam inlet of superheated steam preheater 13 by spiral coil, be heated as superheated steam by high-temperature flue gas.
As shown in Figure 1, whole steam generator supports by supporting 7.
As shown in Figure 1, because the flue-gas temperature height that burning back produces, in order to play fire-resistant and heat insulation double action, and can satisfy the requirement of use for a long time, the inside of whole flue 3 has been adopted and has been coated with refractory insulating layer 5 formation furnace walls, and the structure and material of this furnace wall can satisfy corresponding national standards.
As can be seen from Figure 1,3 groups of preheaters are distributing in the steam generator flue, be respectively: air preheater 4, saturated vapor preheater 6 and superheated steam preheater 13, the effect of these 3 groups of preheaters is respectively: air preheater 4 is used for the required air of pre-thermal response, can improve the heat energy utilization rate of whole steam generator by preheated air; Saturated vapor preheater 6 is the saturated vapor under the whole system pressure with the boiler water preheating; Superheated steam preheater tube 13 continues to be heated to be superheated steam (about 800 ℃) with the saturated vapor in the saturated vapor preheater, and the superheated steam under this temperature is with after raw natural gas mixes, and the temperature of gaseous mixture just can satisfy the temperature conditions of entire reaction.
The existing self-priming forced-air blast (blowing to burner) that has again of the intake method of air by air blast, the fire trough internal combustion of fuel gas in burner 9, fuel gas gas fume after burning temperature can be up to 1100 ℃, combustion flame is limited in the fire trough, guarantee that with this flame can " not lick " miscellaneous part in the steam generator, thereby these parts are caused mechanical damage.
On burner 9 bodies from the inlet scoop, during burner operation, by the self-priming air intake of the aperture on the burner, simultaneously by combustion air inlet 12 forced air supplies, the flue-gas temperature of emitting after the fuel natural gas burning is up to 1100 ℃.By superheated steam preheater 13, saturated vapor preheater 6 and air preheater 4, flue gas is drawn out of flue 3 to high-temperature flue gas under the draft effect of chimney 2 successively.The heat of the absorption of fluids flue gas in flue 3 interior three groups of heat exchangers, it with the normal temperature air preheating respectively the preheated air about 200 ℃, with the boiler water preheating is under 2.0MPa (A) pressure, about 220 ℃ saturated vapor, this saturated vapor is continued to be superheated to 800 ℃ superheated steam, saturation water enters (saturated vapor preheater 6 by boiler water import 602, become saturated vapor by preheating, this saturated vapor is discharged from saturated vapor outlet 602, enter superheated steam preheater 13, continuing preheating in the superheated steam preheater is superheated steam, superheated steam is discharged from piece number superheated steam outlet 8, finishes the process that steam produces.
Disclosed all features in this specification, or the step in disclosed all methods or the process except mutually exclusive feature and/or step, all can make up by any way.
Disclosed arbitrary feature in this specification (comprising any accessory claim, summary and accompanying drawing) is unless special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is, unless special narration, each feature is an example in a series of equivalences or the similar characteristics.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.
Claims (10)
1. natural gas hydrogen preparation device steam generator, comprise burner and steam generation device, it is characterized in that, also comprise flue, described steam generation device comprises superheated steam preheater and saturated vapor preheater, and the high-temperature flue gas that described burner generates transmits heat to superheated steam preheater, saturated vapor preheater successively by flue.
2. a kind of according to claim 1 natural gas hydrogen preparation device steam generator is characterized in that, the nearly port of export is provided with air preheater in the described flue.
3. a kind of according to claim 1 natural gas hydrogen preparation device steam generator is characterized in that described flue inwall is coated with refractory insulating layer.
4. a kind of according to claim 1 natural gas hydrogen preparation device steam generator is characterized in that, described burner body is provided with from inlet scoop and combustion air forced air supply mouth.
5. as a kind of natural gas hydrogen preparation device steam generator as described in claim 1 or 2 or 3 or 4, it is characterized in that the saturated vapor outlet of described saturated vapor preheater is communicated with the import of superheated steam preheater.
6. as a kind of natural gas hydrogen preparation device steam generator as described in the claim 5, it is characterized in that described superheated steam preheater is arranged on the nearly arrival end in the flue.
7. as a kind of natural gas hydrogen preparation device steam generator as described in the claim 6, it is characterized in that described superheated steam preheater is made of the spiral coil that heat exchanger tube is bent into.
8. as a kind of natural gas hydrogen preparation device steam generator as described in the claim 5, it is characterized in that, described saturated vapor preheater comprises upper header and the lower collecting box that is communicated with by pipeline, and wherein upper header is respectively arranged with boiler water import and saturated vapor outlet, and lower collecting box is provided with liquid outlet; The bottom of upper header is communicated with lower collecting box by the boiler water down-comer, and the top of lower collecting box is communicated with upper header by vapor uptake.
9. as a kind of natural gas hydrogen preparation device steam generator as described in the claim 8, it is characterized in that, described air preheater by air intake duct, with air intake duct intersect the air intlet manifold trunk that is communicated with, many groups and air intlet manifold trunk intersect the heat exchanger tube that is communicated with, the preheated air manifold trunk that is communicated with the heat exchanger tube other end, intersect the preheated air outlet that is communicated with the preheated air manifold trunk and constitute.
10. as a kind of natural gas hydrogen preparation device steam generator as described in the claim 9, it is characterized in that, also be provided with relief valve connection, interface of the level gauge and pressure gauge connection on the upper header of described saturated vapor preheater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203111975U CN201517766U (en) | 2009-09-23 | 2009-09-23 | Steam generator for natural gas hydrogen production plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203111975U CN201517766U (en) | 2009-09-23 | 2009-09-23 | Steam generator for natural gas hydrogen production plant |
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| Publication Number | Publication Date |
|---|---|
| CN201517766U true CN201517766U (en) | 2010-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009203111975U Expired - Fee Related CN201517766U (en) | 2009-09-23 | 2009-09-23 | Steam generator for natural gas hydrogen production plant |
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| CN (1) | CN201517766U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110500904A (en) * | 2019-09-20 | 2019-11-26 | 南京聚拓化工科技有限公司 | Integral type ammonia synthesis heat recovery equipment and ammonia synthesis heat recovering process |
| CN113685839A (en) * | 2021-08-25 | 2021-11-23 | 林维金 | Hydrogen-oxygen combustion-supporting energy-saving device of coal-fired boiler |
-
2009
- 2009-09-23 CN CN2009203111975U patent/CN201517766U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110500904A (en) * | 2019-09-20 | 2019-11-26 | 南京聚拓化工科技有限公司 | Integral type ammonia synthesis heat recovery equipment and ammonia synthesis heat recovering process |
| CN110500904B (en) * | 2019-09-20 | 2024-03-05 | 南京聚拓化工科技有限公司 | Integrated ammonia synthesis heat recovery equipment and ammonia synthesis heat recovery process |
| CN113685839A (en) * | 2021-08-25 | 2021-11-23 | 林维金 | Hydrogen-oxygen combustion-supporting energy-saving device of coal-fired boiler |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100630 Termination date: 20180923 |
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| CF01 | Termination of patent right due to non-payment of annual fee |