CN216081096U - Brazed plate heat exchanger with filtering adsorption and normal-para hydrogen conversion functions - Google Patents
Brazed plate heat exchanger with filtering adsorption and normal-para hydrogen conversion functions Download PDFInfo
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Abstract
The utility model discloses a brazed plate heat exchanger with filtering adsorption and normal-para hydrogen conversion functions, which is formed by welding more than two single heat exchangers, wherein each single heat exchanger comprises a heat exchanger shell with a cavity structure in the middle, filters arranged at an upper connector and a lower connector of the heat exchanger, an adsorbent or a catalyst filled in the cavity, and filling ports for filling the adsorbent or the catalyst, wherein the single heat exchangers filled with the catalyst and the adsorbent are alternately arranged in sequence; high-temperature medium flows in from an upper interface of the single-chip heat exchanger filled with the adsorbent, and flows out from a lower interface after the adsorbent adsorbs impurity gas; the low-temperature medium flows in from the lower interface of the monolithic heat exchanger filled with the catalyst, and flows out from the upper interface after being converted by the para-hydrogen; the utility model can integrate the functions of the absorber, the converter and the heat exchanger into the same heat exchanger, reduce the volume of equipment and the number of welded junctions, and reduce energy loss, working hours and labor cost.
Description
Technical Field
The utility model belongs to the technical field of research and development and application of a hydrogen liquefaction device, and particularly relates to a brazed plate heat exchanger with filtering adsorption and normal-para hydrogen conversion functions.
Background
Energy crisis and environmental pollution are the concern all over the world, and the development of renewable clean energy is a necessary trend of the future human society. Hydrogen energy is increasingly favored by scientists of various countries as a renewable and pollution-free clean energy source, but the large-scale use of hydrogen energy is premised on the convenience of storage and transportation, so the research and large-scale development of hydrogen liquefaction equipment are imperative. In the development of a hydrogen liquefaction device, three important devices such as an adsorber, a converter and a heat exchanger are generally available, and the three important devices are generally developed independently and are installed in the same vacuum cooling tank. The equipment is concentrated in the same cold box, the cold box is inevitably large and heavy, the research and development cost of independent design and research and development is high, extra pipelines are required to be connected and used between the cold box and the cold box, the energy loss is increased, the welding openings are increased (the equipment in the hydrogen liquefaction device cold box needs to be welded and butted, and each welding opening needs to be subjected to flaw detection), and the working time and the labor cost are increased. This not only increases the cost investment but also makes the maintenance and use of the equipment inconvenient. Therefore, three equipment functions of the converter, the absorber and the heat exchanger are combined together, and the research and the development are carried out together, so that the volume of the cold box is reduced, and the research and development cost is reduced.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention provides a brazed plate heat exchanger with filtering adsorption and para-hydrogen conversion functions, which can integrate the functions of an adsorber, a converter and a heat exchanger into one heat exchanger, reduce the volume of equipment and the number of welded junctions, and reduce energy consumption, working hours and labor cost.
The technical scheme for realizing the utility model is as follows:
a brazed plate heat exchanger with filtering adsorption and normal-para hydrogen conversion functions is formed by welding more than two single heat exchangers, each single heat exchanger comprises a heat exchanger shell with a cavity structure in the middle, filters arranged at an upper connector and a lower connector of the heat exchanger, an adsorbent or a catalyst filled in the cavity, and filling ports for filling the adsorbent or the catalyst, wherein the upper connector and the lower connector of the heat exchanger are respectively arranged on the upper end surface and the lower end surface of the heat exchanger shell, the filling ports are arranged on the upper end surface of the heat exchanger shell, and the single heat exchangers filled with the catalyst and the adsorbent are sequentially and alternately arranged;
high-temperature medium (hydrogen) flows in from an upper interface of the monolithic heat exchanger filled with the adsorbent, and flows out from a lower interface after the adsorbent adsorbs impurity gas; the low-temperature medium (low-temperature helium or liquid nitrogen) flows in from the lower interface of the monolithic heat exchanger filled with the catalyst, is converted by the para-hydrogen and then flows out from the upper interface.
Furthermore, the filter is formed by superposing two layers of stainless steel pore plates, two layers of stainless steel wire meshes, four layers of filtering and adsorbing plates and three layers of glass silk floss.
Further, the stacking sequence of the components of the filter is as follows from top to bottom: stainless steel orifice plate, stainless steel wire net, filtration adsorption plate, glass silk floss, filtration adsorption plate, stainless steel wire net, stainless steel orifice plate.
Further, the filtering and adsorbing plate is an activated carbon filter plate, a ceramic filter plate or a wool felt plate.
Further, the brazed plate heat exchanger is formed by welding 6 single-plate heat exchangers.
Has the advantages that:
the heat exchanger of the utility model has the following advantages:
1. simultaneously has the functions of an adsorber, a converter and a heat exchanger;
2. the volume of the equipment is smaller on the premise of having the same function;
3. the number of welded junctions is less, extra pipeline connection is not needed, and energy loss is less;
4. the installation is simpler, the working hours are saved, and the research and development cost is reduced;
5. the number of welded junctions is reduced, and the overall safety factor of the equipment is higher.
Drawings
Fig. 1 is a schematic structural view of a monolithic heat exchanger.
Fig. 2 is a working principle diagram of the heat exchanger.
Fig. 3 is an assembly effect diagram of the heat exchanger.
Fig. 4 is a schematic view of the filter structure.
Wherein, 1-heat exchanger shell, 2-filter, 3-adsorbent or catalyst, 4-filling port.
Detailed Description
The utility model is described in detail below by way of example with reference to the accompanying drawings.
Interpretation of terms:
liquid hydrogen is a mixture of para-hydrogen and ortho-hydrogen, which are chemically identical and physically different, and show that the energy of the ground state of para-hydrogen is lower than that of ortho-hydrogen. During liquefaction and storage of hydrogen, ortho-hydrogen is converted to para-hydrogen by autocatalysis and heat is released, so that the liquid hydrogen is evaporated and lost, and therefore the content of para-hydrogen in the liquid hydrogen product is required to be at least more than 95 percent, namely, essentially all ortho-hydrogen is catalytically converted to para-hydrogen during liquefaction. Therefore, the process of converting orthohydrogen into parahydrogen under the action of the catalytic converter is the conversion of orthohydrogen into parahydrogen.
The utility model provides a brazed plate heat exchanger with filtering adsorption and normal-para hydrogen conversion functions, which is formed by welding more than two single heat exchangers as shown in figure 3, wherein the structure of the single heat exchanger is shown in figure 1: the device is formed by assembling two heat exchanger shells 1, two filters 2, an adsorbent or a catalyst 3 and an adsorbent or catalyst filling port 4. The single-chip heat exchanger is formed by welding two heat exchanger shells 1, two filters 2 and a filling port 4, and an adsorbent or a catalyst 3 is filled into the single-chip heat exchanger through the filling port 4. FIG. 2 is a schematic diagram of the operation of a heat exchanger, which is formed by welding a plurality of single-plate heat exchangers, wherein the single-plate heat exchangers filled with a catalyst and an adsorbent are alternately installed in sequence. High-temperature medium (hydrogen in the present case) flows into the monolithic heat exchanger filled with the adsorbent from the upper interface of the heat exchanger and then flows out of the whole heat exchanger, and low-temperature medium (low-temperature helium or liquid nitrogen in the present case) flows into the monolithic heat exchanger filled with the catalyst from the lower interface of the heat exchanger and then flows out of the whole heat exchanger.
FIG. 4 is a schematic diagram of a filter, which is formed by stacking two stainless steel pore plates, two stainless steel wire meshes, four activated carbon filter plates and three layers of glass silk floss.
The embodiment of the utility model is a six-piece brazing plate type heat exchanger, and the scheme of the utility model is suitable for the condition that the number of the heat exchangers is more than or equal to 2.
The filter adsorbing material in the filter is activated carbon, but is not limited to the activated carbon, and can be made of materials such as ceramic filter plates or wool felts.
The high-temperature medium enters from top to bottom and the low-temperature medium enters from bottom to top, but the utility model is not limited to the method, and the method can be inverted, namely the low-temperature medium enters from top to bottom and the high-temperature medium enters from top to bottom.
The brazing plate type heat exchanger simultaneously has the functions of the absorber, the converter and the heat exchanger, but is not limited to the heat exchanger with three functions, and is also suitable for two conditions of the heat exchanger with the functions of the absorber and the heat exchanger with the functions of the converter and the heat exchanger.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A brazed plate heat exchanger with filtering adsorption and normal-para hydrogen conversion functions is characterized by being formed by welding more than two single heat exchangers, wherein each single heat exchanger comprises a heat exchanger shell with a cavity structure in the middle, filters arranged at an upper connector and a lower connector of the heat exchanger, an adsorbent or a catalyst filled in the cavity, and a filling port for filling the adsorbent or the catalyst;
high-temperature medium flows in from an upper interface of the single-chip heat exchanger filled with the adsorbent, and flows out from a lower interface after the adsorbent adsorbs impurity gas; the low-temperature medium flows in from the lower interface of the monolithic heat exchanger filled with the catalyst, is converted by the para-hydrogen and then flows out from the upper interface.
2. The brazed plate heat exchanger with filtering adsorption and para-hydrogen conversion functions as claimed in claim 1, wherein the filter is formed by stacking two stainless steel hole plates, two stainless steel wire meshes, four filtering adsorption plates and three glass wool sponges.
3. The brazed plate heat exchanger with filtering adsorption and para-hydrogen conversion functions as claimed in claim 2, wherein the stacking sequence of the component materials of the filter is as follows from top to bottom: stainless steel orifice plate, stainless steel wire net, filtration adsorption plate, glass silk floss, filtration adsorption plate, stainless steel wire net, stainless steel orifice plate.
4. The brazed plate heat exchanger with filtering adsorption and para-hydrogen conversion functions as claimed in claim 2 or 3, wherein the filtering adsorption plate is an activated carbon filter plate, a ceramic filter plate or a wool felt plate.
5. The brazed plate heat exchanger with filtering adsorption and para-hydrogen conversion functions as recited in claim 1 in which the brazed plate heat exchanger is welded by 6 single-plate heat exchangers.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122082380.6U CN216081096U (en) | 2021-08-31 | 2021-08-31 | Brazed plate heat exchanger with filtering adsorption and normal-para hydrogen conversion functions |
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| CN202122082380.6U CN216081096U (en) | 2021-08-31 | 2021-08-31 | Brazed plate heat exchanger with filtering adsorption and normal-para hydrogen conversion functions |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113639573A (en) * | 2021-08-31 | 2021-11-12 | 北京航天试验技术研究所 | Brazed plate heat exchanger with filtering adsorption and normal-para hydrogen conversion functions |
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2021
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113639573A (en) * | 2021-08-31 | 2021-11-12 | 北京航天试验技术研究所 | Brazed plate heat exchanger with filtering adsorption and normal-para hydrogen conversion functions |
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