CN104654318A - Low-temperature torch gas liquid separating, gasifying and heating system - Google Patents
Low-temperature torch gas liquid separating, gasifying and heating system Download PDFInfo
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- CN104654318A CN104654318A CN201510104867.6A CN201510104867A CN104654318A CN 104654318 A CN104654318 A CN 104654318A CN 201510104867 A CN201510104867 A CN 201510104867A CN 104654318 A CN104654318 A CN 104654318A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
- F23G7/061—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating
- F23G7/065—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating using gaseous or liquid fuel
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Abstract
The invention relates to a system mainly utilizing methanol steam as a heating medium to gasify a low-temperature torch liquid and heat a torch gas, in particular to a low-temperature torch gas liquid separating, gasifying and heating system, which comprises a torch gas liquid separating tank, a torch liquid gasifying device and a torch gas heater, wherein an inlet of the torch gas liquid separating tank is connected with a low-temperature torch gas main pipe, an outlet of the torch gas liquid separating tank is connected with the torch gas heater through a pipeline, a lower pipe opening of the torch gas liquid separating tank is connected with a lower pipe opening of a torch liquid gasifying pipe box through a pipeline, an upper pipe opening of the torch liquid gasifying pipe box is connected with a pipeline of the outlet of the torch gas liquid separating tank through a pipeline, a shell side of the torch liquid gasifying device is connected with a first methanol gasifying system, and a shell side of the torch gas heater is connected with a second methanol gasifying system. The low-temperature torch gas liquid separating, gasifying and heating system has the advantage that the torque liquid gasifying device and the torch gas heater are not in direct contact with water and water steam, so the problem of icing of condensate on a heat exchange pipe is solved, and the heated low-temperature torch gas meets the national standard requirements.
Description
Technical field
The present invention relates to a kind of low temperature torch gas separatory, vaporization and temperature elevation system, mainly utilize methanol steam to vaporize to low temperature torch liquid as heating medium and torch gas carried out to the system of heat temperature raising.
Background technology
Ethene and propylene, as basic chemical raw materials, occupy critical role in chemical industry.In recent years China newly-built and extended tens cover large-scale ethylene plants and tens cover large-scale preparing propylene by dehydrogenating propane device.These devices are under start-stop car or accident condition, a large amount of low temperature torch gas containing ethene, propylene will be produced, and these low temperature torch gas meeting entrainment portions cryogenic liquid, consider from safety and environmental protection and economy, these low temperature torch gas do not allow directly to deliver to flare tip and burn, therefore, before entering flare tip, reply low temperature torch gas carries out separatory, vaporization and intensification.
Publication No. is the way of the Chinese patent of CN104101232 is utilize steam directly to heat ethene by heat exchanger, but due to low temperature torch liquid temp too low (-99 DEG C), heat exchanger tube wall temperature is far below 0 DEG C, steam condensate can be caused like this to have little time to discharge just icing on heat exchange tube wall, heat exchanger even finally can be caused to block, cannot realize heating torch gas.
Summary of the invention
The technical problem to be solved in the present invention is: provide a kind of and adopt low-pressure steam heating methanol, then utilize methyl alcohol to vaporize to low temperature torch liquid as medium and carry out heat temperature raising to torch gas, and the low temperature torch gas separatory of heating effect, vaporization and temperature elevation system can be improved.
Low temperature torch gas separatory of the present invention, vaporization and temperature elevation system, comprise torch gas and divide flow container, torch liquid vaporizer and torch gas heater, torch gas divides flow container entrance to be responsible for low temperature torch gas and is connected, torch gas is divided flow container to export and is connected with torch gas heater by pipeline, torch gas divides flow container lower nozzle to be connected with the torch liquid vaporizer tube lower box part mouth of pipe by pipeline, the pipeline that the torch liquid vaporizer tube upper box part mouth of pipe divides flow container to export by pipeline and torch gas is connected, the shell side of torch liquid vaporizer is connected with the first methyl alcohol vaporizing system, the shell side of torch gas heater is connected with the second methyl alcohol vaporizing system.
Torch divides the technological design of flow container should follow " petrochemical industry fuel gas exhaust system design specification " SH3009.Torch gas divides flow container that low temperature torch gas is carried out separatory, torch liquid enter with torch gas separatory tank connected torch liquid vaporizer in vaporize, torch gas heater is entered together with the torch gas dividing flow container to separate with torch gas after vaporization, torch liquid vaporizer and torch gas heater are all undertaken vaporizing and heating up by methyl alcohol vaporizing system, because torch liquid vaporizer directly can not contact with water (water vapour) with torch gas heater, thus solve condensate water problem icing on heat exchanger tube; Low temperature torch gas after intensification complies with the national standard requirements.
The first described methyl alcohol vaporizing system comprises the first methyl alcohol vaporizing device, first methyl alcohol vaporizing device shell side upper orifice is connected by the shell side upper orifice of pipeline with torch liquid vaporizer, first methyl alcohol vaporizing device shell side lower nozzle is connected with torch liquid vaporizer shell side lower nozzle by pipeline, first methyl alcohol vaporizing device arrival end connects steam pipe system by Stress control control valve, the first methyl alcohol vaporizing device port of export connects steam condensate draining system by pipeline, and steam condensate draining system connects condensate water pipe network.First methyl alcohol vaporizing device can be Kettle formula reboiler, steam walks tube side, methyl alcohol walks shell side, low-pressure steam enters the first methyl alcohol vaporizing device by Stress control control valve, the lime set that first methyl alcohol vaporizing device produces enters steam condensate draining system by pipeline, and the lime set after hydrophobic enters condensate water pipe network.First methyl alcohol vaporizing device shell side upper orifice is connected by the shell side upper orifice of pipeline with torch liquid vaporizer, first methyl alcohol vaporizing device shell side lower nozzle is connected by the shell side lower nozzle of pipeline with torch liquid vaporizer, thus define a closed methanol loop loop, namely methyl alcohol is heat vaporized in the first methyl alcohol vaporizing device, methanol steam constantly enters torch liquid vaporizer from the first methyl alcohol vaporizing device, methyl alcohol and the heat exchange of cold torch liquid in torch liquid vaporizer and condensation, methyl alcohol lime set is then back to the first methyl alcohol vaporizing device from torch liquid vaporizer under gravity.
Described torch liquid vaporizer is U-shaped heat exchange of heat pipe, and low temperature torch liquid walks tube side, and low temperature torch liquid accesses from bobbin carriage lower nozzle, gas phase picks out from bobbin carriage upper orifice, methyl alcohol walks shell side, and methanol steam is from the access of shell side upper orifice, and methyl alcohol lime set picks out from shell side lower nozzle.
Described torch liquid vaporizer is arranged on the top of the first methyl alcohol vaporizing device, and the pipeline between the first methyl alcohol vaporizing device upper orifice and torch liquid vaporizer is provided with safety valve and pressure display transformer, pressure display transformer Bonding pressure control and regulation valve.In order to ensure that methyl alcohol lime set can flow to the first methyl alcohol vaporizing device certainly; torch liquid vaporizer is arranged on the top of the first methyl alcohol vaporizing device; safety valve can when methyl alcohol system overpressure protection system safety; pressure signal can be reached Stress control control valve by pressure display transformer; according to the aperture of the size adjustment Stress control control valve of pressure; thus controlling the inlet amount of steam, in final maintenance the first methyl alcohol vaporizing device, methanol pressure is definite value.
The second described methyl alcohol vaporizing system comprises the second methyl alcohol vaporizing device, second methyl alcohol vaporizing device shell side upper orifice is connected with the shell side upper orifice of torch gas heater by pipeline, second methyl alcohol vaporizing device shell side lower nozzle is connected with torch gas heater shell side lower nozzle by pipeline, second methyl alcohol vaporizing device arrival end connects steam pipe system by Stress control control valve, the second methyl alcohol vaporizing device port of export connects steam condensate draining system by pipeline, and steam condensate draining system connects condensate water pipe network.Second methyl alcohol vaporizing device can be Kettle formula reboiler, steam walks tube side, methyl alcohol walks shell side, low-pressure steam enters the second methyl alcohol vaporizing device by Stress control control valve, the lime set that second methyl alcohol vaporizing device produces enters steam condensate draining system by pipeline, and the lime set after hydrophobic enters condensate water pipe network.Second methyl alcohol vaporizing device shell side upper orifice is connected with the shell side upper port of torch gas heater by pipeline, second methyl alcohol vaporizing device shell side bottom is connected with the shell side lower nozzle of torch gas heater by pipeline, thus define a closed methanol loop loop, namely methyl alcohol is heat vaporized in the second methyl alcohol vaporizing device, methanol steam constantly enters torch gas heater from the second methyl alcohol vaporizing device, methyl alcohol and cold torch gas heat exchange in torch gas heater and condensation, methyl alcohol lime set is then back to the second methyl alcohol vaporizing device from torch gas heater under gravity.
Described torch gas heater is fixed tube-sheet exchanger, and tube side made leave with rage by low temperature torch, and methyl alcohol walks shell side, and methanol steam is from the access of shell side upper orifice, and methyl alcohol lime set picks out from shell side lower nozzle.
Described torch gas heater is arranged on the top of the second methyl alcohol vaporizing device, and the pipeline between the second methyl alcohol vaporizing device upper orifice and torch gas heater is provided with safety valve and pressure display transformer, pressure display transformer Bonding pressure control and regulation valve.In order to ensure that methyl alcohol lime set can flow to the second methyl alcohol vaporizing device certainly; so torch gas heater to be arranged on the top of the second methyl alcohol vaporizing device; safety valve can when methyl alcohol system overpressure protection system safety; pressure signal can be reached Stress control control valve by pressure display transformer; according to the aperture of the size adjustment Stress control control valve of pressure; thus controlling the inlet amount of steam, in final maintenance the first methyl alcohol vaporizing device, methanol pressure is definite value.
Described torch gas divides flow container to be arranged on the top of torch liquid vaporizer.In order to ensure that torch gas divides the low temperature torch liquid in flow container to be all vaporized.
First methyl alcohol vaporizing device and the second methyl alcohol vaporizing device are provided with liquid level gauge respectively, for according to liquid level instruction, supplement methyl alcohol in good time.If when the minimum environment temperature residing for device is lower than 0 DEG C, in order to avoid pipeline freezes, lime set pipeline and steam control valve by-pass line all should accompany heat.In addition, if the low temperature torch tolerance of process is less, the first methyl alcohol vaporizing device and the second methyl alcohol vaporizing device can be merged into a methyl alcohol vaporizing device.
Steam condensate draining system is that two drain valves are installed in parallel, one open one standby.If handled low temperature torch gas is ethene torch gas, the part of appliance contacted with low temperature torch gas and pipe fitting material should adopt 304 stainless steels; If handled low temperature torch gas is propylene torch gas, in order to reduce investment outlay, the part of appliance contacted with low temperature torch gas and pipe fitting material should adopt low temperature carbon steel, and all the other parts of appliance and pipe fitting material adopt carbon steel.
The invention has the beneficial effects as follows:
Torch liquid vaporizer directly can not contact with water (water vapour) with torch gas heater, thus solves condensate water problem icing on heat exchanger tube; Low temperature torch gas after intensification complies with the national standard requirements; According to handled low temperature torch gas to equipment and pipe material selecting, cost of can reducing investment outlay in a large number; Methyl alcohol, at enclosure space Inner eycle, is only used as heating medium, does not consume, can save operating cost; Thermal source used is Low Temperature Steam, and steam condensate all reclaims, energy-conservation, water saving and environmentally safe.In sum, the present invention have that flow process is simple, cost is low, the advantage such as safe and reliable and energy-conserving and environment-protective.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
In figure: 1, torch gas divides flow container 2, torch liquid vaporizer 3, torch gas heater 4, first methyl alcohol vaporizing device 5, second methyl alcohol vaporizing device 6, pressure display transformer 7, Stress control control valve 8, steam condensate draining system 9, safety valve 10, liquid level gauge.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described further:
As shown in Figure 1, low temperature torch gas separatory of the present invention, vaporization and temperature elevation system, comprise torch gas and divide flow container 1, torch liquid vaporizer 2 and torch gas heater 3, torch gas divides flow container 1 entrance to be responsible for low temperature torch gas and is connected, torch gas is divided flow container 1 to export and is connected with torch gas heater 3 by pipeline, torch gas divides flow container 1 lower nozzle to be connected with torch liquid vaporizer 2 bobbin carriage lower nozzle by pipeline, the pipeline that torch liquid vaporizer 2 bobbin carriage upper orifice divides flow container 1 to export by pipeline and torch gas is connected, the shell side of torch liquid vaporizer 2 is connected with the first methyl alcohol vaporizing system, the shell side of torch gas heater 3 is connected with the second methyl alcohol vaporizing system.First methyl alcohol vaporizing system comprises the first methyl alcohol vaporizing device 4, first methyl alcohol vaporizing device 4 shell side upper orifice is connected by the shell side upper orifice of pipeline with torch liquid vaporizer 2, first methyl alcohol vaporizing device 4 shell side lower nozzle is connected with torch liquid vaporizer 2 shell side lower nozzle by pipeline, first methyl alcohol vaporizing device 4 arrival end connects steam pipe system by Stress control control valve 7, first methyl alcohol vaporizing device 4 port of export connects steam condensate draining system 8 by pipeline, and steam condensate draining system 8 connects condensate water pipe network.Torch liquid vaporizer 2 is U-shaped heat exchange of heat pipe, and low temperature torch liquid walks tube side, and low temperature torch liquid accesses from bobbin carriage lower nozzle, gas phase picks out from bobbin carriage upper orifice, methyl alcohol walks shell side, and methanol steam is from the access of shell side upper orifice, and methyl alcohol lime set picks out from shell side lower nozzle.Torch liquid vaporizer 2 is arranged on the top of the first methyl alcohol vaporizing device 4, and the pipeline between the first methyl alcohol vaporizing device 4 upper orifice and torch liquid vaporizer 2 is provided with safety valve 9 and pressure display transformer 6, pressure display transformer 6 Bonding pressure control and regulation valve 7.Second methyl alcohol vaporizing system comprises the second methyl alcohol vaporizing device 5, second methyl alcohol vaporizing device 5 shell side upper orifice is connected with the shell side upper orifice of torch gas heater 3 by pipeline, second methyl alcohol vaporizing device 5 shell side lower nozzle is connected with torch gas heater 3 shell side lower nozzle by pipeline, second methyl alcohol vaporizing device 5 arrival end connects steam pipe system by Stress control control valve 7, second methyl alcohol vaporizing device 5 port of export connects steam condensate draining system 8 by pipeline, and steam condensate draining system 8 connects condensate water pipe network.Torch gas heater 3 is fixed tube-sheet exchanger, and tube side made leave with rage by low temperature torch, and methyl alcohol walks shell side, and methanol steam is from the access of shell side upper orifice, and methyl alcohol lime set picks out from shell side lower nozzle.Torch gas heater 3 is arranged on the top of the second methyl alcohol vaporizing device 5, and the pipeline between the upper orifice of the second methyl alcohol vaporizing device 5 and torch gas heater 3 is provided with safety valve 9 and pressure display transformer 6, pressure display transformer 6 Bonding pressure control and regulation valve 7.Torch gas divides flow container 1 to be arranged on the top of torch liquid vaporizer 2.First methyl alcohol vaporizing device 4 and the second methyl alcohol vaporizing device 5 are provided with liquid level gauge 10 respectively, for according to liquid level instruction, supplement methyl alcohol in good time.
In diagram, A represents the torch gas after low temperature torch gas, B representative process, C represents low-pressure steam, D represents low-pressure steam lime set, E represents methyl alcohol, and arrow represents above-mentioned gas, the liquid flow direction in pipe-line system respectively.
Low temperature torch gas A enters torch gas from low temperature torch gas supervisor and divides flow container 1, low temperature torch liquid enters in the tube side of torch liquid vaporizer 2, low-pressure steam C from steam pipe system enters the first methyl alcohol vaporizing device 4 by Stress control control valve 7, the lime set that first methyl alcohol vaporizing device 4 produces enters steam condensate draining system 8 by pipeline, and the lime set after hydrophobic enters condensate water pipe network.First methyl alcohol vaporizing device 4 shell side upper orifice is connected by the shell side upper orifice of pipeline with torch liquid vaporizer 2, first methyl alcohol vaporizing device 4 shell side lower nozzle is connected by the shell side lower nozzle of pipeline with torch liquid vaporizer 2, thus define a closed methanol loop loop, namely methyl alcohol is heat vaporized in the first methyl alcohol vaporizing device 4, methanol steam constantly enters torch liquid vaporizer 2 from the first methyl alcohol vaporizing device 4, methyl alcohol and the heat exchange of cold torch liquid in torch liquid vaporizer 2 and condensation, methyl alcohol lime set is then back to the first methyl alcohol vaporizing device 4 from torch liquid vaporizer 2 under gravity.Torch gas after vaporization enters in torch gas heater 3 together with divide the torch gas of flow container 1 to merge from torch gas after.
In like manner, the lime set that the low-pressure steam C from steam pipe system enters the second methyl alcohol vaporizing device 5, second methyl alcohol vaporizing device 5 generation by Stress control control valve 7 enters steam condensate draining system 8 by pipeline, and the lime set after hydrophobic enters condensate water pipe network.Second methyl alcohol vaporizing device 5 shell side upper orifice is connected with the shell side upper port of torch gas heater 3 by pipeline, second methyl alcohol vaporizing device 5 shell side bottom is connected with the shell side lower nozzle of torch gas heater 3 by pipeline, thus define a closed methanol loop loop, namely methyl alcohol is heat vaporized in the second methyl alcohol vaporizing device 5, methanol steam constantly enters torch gas heater 3 from the second methyl alcohol vaporizing device 5, methyl alcohol and cold torch gas heat exchange in torch gas heater 3 and condensation, methyl alcohol lime set is then back to the second methyl alcohol vaporizing device 5 from torch gas heater 3 under gravity.Finally, the torch gas after heating flows out from torch gas heater 3.
Claims (8)
1. a low temperature torch gas separatory, vaporization and temperature elevation system, it is characterized in that: comprise torch gas and divide flow container (1), torch liquid vaporizer (2) and torch gas heater (3), torch gas divides flow container (1) entrance to be responsible for low temperature torch gas and is connected, torch gas is divided flow container (1) to export and is connected with torch gas heater (3) by pipeline, torch gas divides flow container (1) lower nozzle to be connected with torch liquid vaporizer (2) bobbin carriage lower nozzle by pipeline, torch liquid vaporizer (2) bobbin carriage upper orifice divides the flow container pipeline that (1) exports to be connected by pipeline and torch gas, the shell side of torch liquid vaporizer (2) is connected with the first methyl alcohol vaporizing system, the shell side of torch gas heater (3) is connected with the second methyl alcohol vaporizing system.
2. low temperature torch gas separatory according to claim 1, vaporization and temperature elevation system, it is characterized in that: the first methyl alcohol vaporizing system comprises the first methyl alcohol vaporizing device (4), first methyl alcohol vaporizing device (4) shell side upper orifice is connected by the shell side upper orifice of pipeline with torch liquid vaporizer (2), first methyl alcohol vaporizing device (4) shell side lower nozzle is connected with torch liquid vaporizer (2) shell side lower nozzle by pipeline, first methyl alcohol vaporizing device (4) arrival end connects steam pipe system by Stress control control valve (7), first methyl alcohol vaporizing device (4) port of export connects steam condensate draining system (8) by pipeline, steam condensate draining system (8) connects condensate water pipe network.
3. low temperature torch gas separatory according to claim 2, vaporization and temperature elevation system, it is characterized in that: torch liquid vaporizer (2) is U-shaped heat exchange of heat pipe, low temperature torch liquid walks tube side, low temperature torch liquid accesses from bobbin carriage lower nozzle, gas phase picks out from bobbin carriage upper orifice, methyl alcohol walks shell side, and methanol steam is from the access of shell side upper orifice, and methyl alcohol lime set picks out from shell side lower nozzle.
4. low temperature torch gas separatory according to claim 2, vaporization and temperature elevation system, it is characterized in that: torch liquid vaporizer (2) is arranged on the top of the first methyl alcohol vaporizing device (4), pipeline between first methyl alcohol vaporizing device (4) upper orifice and torch liquid vaporizer (2) is provided with safety valve (9) and pressure display transformer (6), pressure display transformer (6) Bonding pressure control and regulation valve (7).
5. low temperature torch gas separatory according to claim 1 and 2, vaporization and temperature elevation system, it is characterized in that: the second methyl alcohol vaporizing system comprises the second methyl alcohol vaporizing device (5), second methyl alcohol vaporizing device (5) shell side upper orifice is connected by the shell side upper orifice of pipeline with torch gas heater (3), second methyl alcohol vaporizing device (5) shell side lower nozzle is connected with torch gas heater (3) shell side lower nozzle by pipeline, second methyl alcohol vaporizing device (5) arrival end connects steam pipe system by Stress control control valve (7), second methyl alcohol vaporizing device (5) port of export connects steam condensate draining system (8) by pipeline, steam condensate draining system (8) connects condensate water pipe network.
6. low temperature torch gas separatory according to claim 5, vaporization and temperature elevation system, it is characterized in that: torch gas heater (3) is fixed tube-sheet exchanger, tube side made leave with rage by low temperature torch, methyl alcohol walks shell side, methanol steam is from the access of shell side upper orifice, and methyl alcohol lime set picks out from shell side lower nozzle.
7. low temperature torch gas separatory according to claim 5, vaporization and temperature elevation system, it is characterized in that: torch gas heater (3) is arranged on the top of the second methyl alcohol vaporizing device (5), pipeline between second methyl alcohol vaporizing device (5) upper orifice and torch gas heater (3) is provided with safety valve (9) and pressure display transformer (6), pressure display transformer (6) Bonding pressure control and regulation valve (7).
8. low temperature torch gas separatory according to claim 1, vaporization and temperature elevation system, is characterized in that: torch gas divides flow container (1) to be arranged on the top of torch liquid vaporizer (2).
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| CN111692895A (en) * | 2019-03-13 | 2020-09-22 | 惠生工程（中国）有限公司 | Cold torch gas liquid separating, vaporizing and heating system |
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| CN104654318B (en) | 2017-01-18 |
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