CN203395570U - Inner insulating structure of solid ammonia storage system - Google Patents
Inner insulating structure of solid ammonia storage system Download PDFInfo
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- CN203395570U CN203395570U CN201320458737.9U CN201320458737U CN203395570U CN 203395570 U CN203395570 U CN 203395570U CN 201320458737 U CN201320458737 U CN 201320458737U CN 203395570 U CN203395570 U CN 203395570U
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- ammonia
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Abstract
The utility model relates to an inner insulating structure of a solid ammonia storage system. The structure is characterized in that the upper and lower openings of an insulating cloth bag are fixed at both ends of a spiral stainless steel antifreezing liquid heating pipe by hoops, and the bag is placed in a solid material storage tank. One end of the stainless steel antifreezing liquid heating pipe passes through one end of the solid material storage tank, and the end of the stainless steel antifreezing liquid heating pipe and the one end of the solid material storage tank are welded together by argon arcs. The other end of the stainless steel antifreezing liquid heating pipe is firmly welded with an upper bottom plate fixedly arranged on the solid material storage tank. The upper bottom plate is provided with an ammonia filling port and an ammonia releasing port. According to the structure, the insulating cloth bag with a certain thickness is placed in the system in advance, solid active materials are placed in the insulating cloth bag, the heating pipe passes through from the middle of the insulating cloth bag, and both ends of the insulating cloth bag are fastened. After the insulating cloth bag is used, the heat loss in the system can be reduced by over 90%, thereby creating a basic condition for guaranteeing stable operation of the system. The structure has the characteristics of skillful concept, simple process, low cost, safety and reliability and easiness in maintenance.
Description
Technical field
The utility model relates to a kind of internal insulation structure of solid storage ammonia system, is applied to SCR after-treatment system and the FCEV fuel cell system of vehicle exhaust.
Background technique
Current, the whole world faces the comprehensive challenge of the energy and environment.Aspect the technological means selection of the emission compliance of orthodox car, and the fuel of new-energy automobile is supplied with technical elements people and is still faced many difficult problems.
SCR after-treatment system is rely on the accurate supply of carbamide reducing agent and resolve into ammonia De NO X hazardous material afterwards at the front end of catalyzer, reach the object of cleaning of off-gas, realize the up to standard of the state 4 of vehicle or above standard, but, in actual use, this dependence urea decomposition becomes the metered injection of the liquid area of ammonia to have many deficiencies and difficult point, for example, the problem that urea liquid freezes and stops up under-11 ℃ of environment, needs extra pipeline heating system to solve, urea liquid could decompose under more than 135 ℃ temperature environments, and many vehicles of public transit system loiter, cannot reach urea liquid stable decomposition temperature at all, cannot output ammonia, cannot eliminate predetermined NOX composition, finally cause the accumulation of liquid area in outlet pipe, produce the polymer of melamine, stop up urea nozzle and engine exhaust pipe, cause vehicle to produce fault, impact is normal to be used, in addition, if the more than 4 main flow vehicle of state uses SCR system comprehensively, relate to approximately 150,000, whole nation oiling website and again build the problem of liquid area filling Infrastructure, because investment is huge, at present, still do not see that Government and enterprise starts to improve this Infrastructure, become a potential huge problem in SCR use,
For breaking through energy predicament, solve the new-energy automobile development problem of future source of energy problem, it is a very important technology path that hydrogen fuel cell is recognized, but, how stable acquisition hydrogen source is a no small difficult problem for restriction related domain development, likely in the mode of adopted hydrogen source, the technology path that has gas cylinder storage hydrogen, the technology path that has water electrolysis hydrogen production, the technology path that has high-purity hydro carbons petroleum fuel cracking hydrogen production, the hydrogeneous precursor decomposition of the technology path of low mass molecule alcohol class cracking hydrogen production and other H-N or the technology path of cracking hydrogen production, in above-mentioned technology path, all there are some problem and shortage, for example, hydrogen production efficiency and cost, hydrogen manufacturing precision and speed, also the problem that comprises system aspects, in a word, the source of hydrogen is the bottleneck of fuel-cell vehicle development, need people's idea to solve,
One of them is the hydrogeneous compound of H-N for the precursor of hydrogen, and wherein, what hydrogen-storage density was the highest is ammonia.Ammonia is a kind of modal industrial chemicals, and ammonia molecule belongs to active polar molecule, and the diameter dimension of molecule is about 3 ~ 4A, therefore, very active under normal temperature, very easily diffusion, and there is toxic; Its toxic is embodied in has corrosion and spread effect to the skin histology of contact; Ammonia in water solubility high, so mainly the upper respiratory tract of animal or human's body is had and is stimulated and corrosive action, in addition, ammonia sucks human body with gas form conventionally, ammonia easily enters blood by alveolar after being inhaled into lung, destroy fortune oxygen function, suck in a short time there will be after a large amount of ammonias shed tears, pharyngalgia, cough, uncomfortable in chest, expiratory dyspnea, dizzy, vomiting and weak etc.; If the long-term ammonia sucking is too much, cause ammonia excessive concentration in blood, will cause heart stop fight and breath stopped, threat to life safety; Therefore, the maximum hidden danger of the use of ammonia is safety problem.
As can be seen here, resolve in the use of ammonia and store and safety problem, just can open up the technology path of a new ammonia utilization.
Traditional ammonia storing mode is gas cylinder, or realizes with the water-soluble formation ammoniacal liquor of high concentration ammonia.If adopt gas cylinder to store ammonia, in commercial Application in enormous quantities, there is the potential safety hazard of operating aspect and seal aspect, if in the mode of high concentrated ammonia liquor, there is again serious etching problem.
Industrial, utilize slaine and ammonia to form complex compound, the reversible process of the adsorption-desorption by ammonia is applied to food fresh keeping and freezes, first the adsorptive process of slaine and ammonia is exothermic process, then ammonia desorb absorbs again heat, make environment refrigeration, therefore, some specific slaine is basic physical chemistry general knowledge to ammonia adsorption-desorption.
According to the principles of chemistry, complex compound claims again coordination compound, every molecule or ion that contains lone pair electrons (or π key) by two or more made ligand, with there is the central atom of empty valence orbit or element of construction that ions binding forms and claim complexing unit, complexing unit with electric charge claims complex ion, the compound that the ion of electroneutral complexing unit or complex ion and opposite charges forms is all called complex compound, sometimes also complex ion is called to complex compound traditionally, some alkali metal or alkaline-earth metal, can form with ammonia the structure of molecule of complex compound, for example, complex salt [Ag (NH
3)
2] Cl and [Cu (NH
3)
4] SO
4, complex acid H
2[PtCl
6], network alkali [Cu (NH
3)
4] (OH)
2deng, also refer to uncharged complex molecule, for example, [Fe (SCN)
3], [Co (NH
3)
3cl
3] etc.Wherein, [Cu(NH
3)
4] SO
4cupric tetramminosulfate is famous cupric ammine complex, and the characteristic component of structure of molecule is, by the part (NH of some
3) negative ion or molecule by coordinate bond, be incorporated into that central ion (Cu or neutral atom) forms around with different molecule or the ions of original constitutive property, this complex compound is to combine with coordinate bond.For ammino calcium chloride [Ca (NH
3)
8cl
12], the lone pair electrons that the 3d track of calcium atom sky holds ammonia form coordinate bond, and its adsorption/desorption reaction enclosure formula is as follows,
CaCl
2absorption NH
3closely be connected with particle around afterwards, form and be close to the caking that there is no hole, remaining NH
3be difficult to enter into this region, thereby cause NH
3extent of adsorption greatly reduces, and has hindered the formation of ammino calcium chloride complex compound; Than loose absorbent powder, the adsorbent solids piece that utilizes mechanical direct pressing to form, ammonia transmission duct is less, and absorption and desorption efficiency are low; In addition, CaCl
2absorption NH
3rear volumetric expansion, the easy efflorescence of solid block is broken, affects using effect.
In order to improve the hole of storage ammonia active substance solid block, increase ammonia transmission channel, weaken or avoid repeatedly CaCl in sorption and desorption additive process
2the caking occurring and the efflorescence of solid block are broken, and what meet industrial occasions repeatedly recycles requirement, through our continuous experimental study, proposes a kind of porous storage ammonia active mixture and preparation thereof that contains carbon fiber.
Summary of the invention
The purpose of this utility model is to provide a kind of internal insulation structure of solid storage ammonia system, it puts in advance one and has certain thickness insulation cloth bag in system, the active material of solid is put into insulation cloth bag, heating pipe passes through from the centre of insulation cloth bag, tighten at the two ends of insulation cloth bag, after insulation cloth bag is used, can make intrasystem heat loss reduce more than 90%, for basic condition is created in the stable operation of assurance system; It is ingenious that it has thinking, and technique is simple, with low cost, safe and reliable, is easy to the feature of safeguarding.
Technological scheme of the present utility model is achieved in that the internal insulation structure of solid storage ammonia system, by solid material storage tank, and insulation cloth bag, antifreeze liquid conduit, solid ammonia-storing material, fills ammonia and puts ammonia mouth, upper plate, metal clip forms; It is characterized in that: clip is fixed on insulation cloth bag upper and lower opening at the two ends of spiral stainless antifreeze liquid heating pipe, put into solid material storage tank, one end of stainless antifreeze liquid heating pipe is passed from one end of solid material storage tank, and argon arc welding together, the other end of stainless antifreeze liquid heating pipe is firm with the upper plate welding being fixed on solid material storage tank, has and fill ammonia and put ammonia mouth on upper plate.
The external diameter of described insulation cloth bag is identical with the internal diameter of solid material storage tank, and heat insulating cloth bag length is greater than solid material storage tank cavity height 100 ~ 150mm.
Described insulation cloth bag is glass filter bag, glass needled belt and magnificent cent series filter bag, or the prepared filter bag of industrial high temperature high strength fibre cloth of Stainless Steel Fibre blending, and the thickness of filter bag is 2 ~ 4mm, and serviceability temperature is more than 100 ℃.
Good effect of the present utility model is the result according to test, optimizes and improves technological scheme, the ingenious insulation problem having solved in the use of solid ammonia-storing material system, and heat insulation and preservation effect improves 90%; The reliability and stability of system are improved greatly, meet more harsh automobile emissions standards requirement, be conducive to automobile industry and reduce discharging; There is very high use value, be suitable for SCR reprocessing or following FCEV system of automobile industry.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the utility model assembling process first step.
Fig. 2 is the schematic diagram of the utility model assembling process second step.
Fig. 3 is the schematic diagram of the utility model assembling process the 3rd step.
Fig. 4 is the schematic diagram of the utility model assembling process the 4th step.
Fig. 5 is the schematic diagram of the utility model structure.
Embodiment
Accompanying drawing is described further the utility model below, as shown in Figure 5, the internal insulation structure of solid storage ammonia system, by solid material storage tank 1, insulation cloth bag 2, antifreeze liquid conduit 3, solid ammonia-storing material 4, fills ammonia and puts ammonia mouth 5, upper plate 6, metal clip 7 forms; It is characterized in that: metal clip 7 is fixed on insulation cloth bag 2 upper and lower openings at the two ends of spiral stainless antifreeze liquid heating pipe 3, put into solid material storage tank 1, one end of stainless antifreeze liquid heating pipe 3 is passed from one end of solid material storage tank 1, and argon arc welding together, the other end of stainless antifreeze liquid heating pipe 3 is firm with upper plate 6 welding that are fixed on solid material storage tank 1, has and fill ammonia and put ammonia mouth 5 on upper plate 6.
The external diameter of described insulation cloth bag 2 is identical with the internal diameter of 1-solid material storage tank, and insulation cloth bag 2 length are greater than solid material storage tank 1 cavity height 100 ~ 150mm.
Described insulation cloth bag 2 is glass filter bag, glass needled belt and magnificent cent series filter bag, or the prepared filter bag of industrial high temperature high strength fibre cloth of Stainless Steel Fibre blending, and the thickness of filter bag is 2 ~ 4mm, and serviceability temperature is more than 100 ℃.
Being placed on the solid ammonia-storing material in solid material storage tank 1, in putting the process of ammonia, is to rely on stable temperature to guarantee the temperature, pressure of system, according to equation of gaseous state PV=nRT, after the temperature T of system changes, in the situation that the volume V of system remains unchanged, directly cause the change of pressure P; Therefore,, if wish that pressure P is constant or fluctuation is less, just must solve the stable problem of T;
For solid material storage tank 1, the application of Insulation is fully necessary, because China is vast in territory, the temperature allowance below nominal size of north and south and Dong Xia is up to more than 70 ℃, add the air-cooled effect in Vehicle Driving Cycle, even in summer, stationary vehicle and the ambient temperature of running at high speed are very large for the heat radiation impact of solid material storage tank 1;
It is to adopt commercially available glass filter bag that the utility model adopts insulation cloth bag 2, the base materials such as glass needled belt and magnificent cent series filter bag, also can adopt the prepared filter bag of industrial high temperature high strength fibre cloth of Stainless Steel Fibre blending, the thickness of filter bag is 2 ~ 4mm, serviceability temperature is at more than 100 ℃ filter bags, the thickness effect working life of filter bag, thickness is less than 2mm, insufficient strength, the wearing and tearing of material and thermal vibration easily make filter bag damage, but, when the thickness of filter bag is greater than 4mm, although intensity improves, better heat preservation, by the actual volume space of too much ' sacrifice ' storage tank, the external diameter of insulation cloth bag 2 is identical with the internal diameter of solid material storage tank 1, and insulation cloth bag 2 length are greater than solid material storage tank 1 cavity height 100 ~ 150mm, require these rich length of insulation cloth bag, are mainly conveniently to complete tying up of two ends, the high-temperature dust that the filter bag of these materials is widely used in melting industry filters, and is only the difference of size, these materials can well match with solid ammonia-storing material, possess corrosion resistant feature, difference is, although the thickness of the cloth bag that these are commercially available is 2 ~ 4mm, the cloth bag of the maximum ga(u)ge that can buy on Zhe Yeshi market, but, that considers solid ammonia-storing material and system will reach 16 ~ 200,000 km with the car life-span, these cloth bags stand certain temperature in storage tank, stand certain corrosive environment, and the friction of the high vibration in Vehicle Driving Cycle and reservoir walls, problem broken and that damage will inevitably be there is, for this reason, cloth bag is sewn into after filter bag, all adopt industrial TiO 2 sol to infiltrate once, and dry 30min at 80 ~ 120 ℃ of temperature, in order that improve the friction durability of this material monolithic, from then on by cloth bag, become the special-purpose thermal insulation cloth bag 2 possessing compared with high abrasion resistance strength,
This insulation cloth bag 2 has abundant micropore and ventilating performance, is unlikely to stop up, and makes the passing through of molecule of ammonia, does not affect the effusion of ammonia; And the metal clip of tying up filter bag, material is stainless steel, is common commercially available prod;
Assembling and the process of filling are as follows: with clip, insulation cloth bag 2 is first fixed on to one end of spiral stainless antifreeze liquid heating pipe 3, as shown in Fig. 1, put into solid material storage tank 1, one end of stainless antifreeze liquid heating pipe 3 is passed from one end of solid material storage tank 1, and argon arc welding together, as shown in Figure 2; Then fill the solid ammonia-storing material 4 of specified quantity, generally, the volume of the solid ammonia-storing material of filling should be equivalent to be incubated 40% of effective volume after cloth bag 2 is tied up, prevents too much filling, fill volumetric expansion after ammonia and damage insulation cloth bag 2, as shown in Figure 3; With clip, the other end of filter bag is first fixed on to the other end of spiral stainless antifreeze liquid heating pipe, and upper plate 6 is firm with the other end argon arc welding of solid material storage tank 1 and antifreeze liquid heating pipe 3, as shown in Figure 4; Finally formed the solid storage ammonia structure with interior insulation, as shown in Figure 5.
The successful that this patent is implemented, for example, does not have the storage ammonia system of interior insulation cloth bag, and the temperature of the temperature of storage tank shell at work and inner active material differs between 3 ~ 15 ℃, and heat insulation effect is poor; And adopted the storage ammonia system of the interior insulation cloth bag that thickness is 4mm, and the temperature of the temperature of storage tank shell at work and inner active material differs between 28 ~ 51 ℃, and heat insulation effect is obvious.
Claims (3)
1. the internal insulation structure of solid storage ammonia system, by solid material storage tank, is incubated cloth bag, antifreeze liquid conduit, and solid ammonia-storing material, fills ammonia and puts ammonia mouth, upper plate, metal clip forms; It is characterized in that: clip is fixed on insulation cloth bag upper and lower opening at the two ends of spiral stainless antifreeze liquid heating pipe, put into solid material storage tank, one end of stainless antifreeze liquid heating pipe is passed from one end of solid material storage tank, and argon arc welding together, the other end of stainless antifreeze liquid heating pipe is firm with the upper plate welding being fixed on solid material storage tank, has and fill ammonia and put ammonia mouth on upper plate.
2. according to the internal insulation structure of the solid storage ammonia system described in claim 1, it is characterized in that the external diameter of described insulation cloth bag is identical with the internal diameter of solid material storage tank, heat insulating cloth bag length is greater than solid material storage tank cavity height 100 ~ 150mm.
3. according to the internal insulation structure of the solid storage ammonia system described in claim 1, it is characterized in that described insulation cloth bag is glass filter bag, glass needled belt and magnificent cent series filter bag, or the prepared filter bag of industrial high temperature high strength fibre cloth of Stainless Steel Fibre blending, the thickness of filter bag is 2 ~ 4mm, and serviceability temperature is more than 100 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320458737.9U CN203395570U (en) | 2013-07-30 | 2013-07-30 | Inner insulating structure of solid ammonia storage system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320458737.9U CN203395570U (en) | 2013-07-30 | 2013-07-30 | Inner insulating structure of solid ammonia storage system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203395570U true CN203395570U (en) | 2014-01-15 |
Family
ID=49907102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320458737.9U Expired - Lifetime CN203395570U (en) | 2013-07-30 | 2013-07-30 | Inner insulating structure of solid ammonia storage system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203395570U (en) |
-
2013
- 2013-07-30 CN CN201320458737.9U patent/CN203395570U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140115 |