CN1033598C - Technology for overheat steam temp. difference graded supply and its apparatus - Google Patents
Technology for overheat steam temp. difference graded supply and its apparatus Download PDFInfo
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- CN1033598C CN1033598C CN 89102458 CN89102458A CN1033598C CN 1033598 C CN1033598 C CN 1033598C CN 89102458 CN89102458 CN 89102458 CN 89102458 A CN89102458 A CN 89102458A CN 1033598 C CN1033598 C CN 1033598C
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Abstract
The present invention relates to a heat supply technique and a device thereof for superheated steam temperature difference grading for printing and dyeing industry, which has the technical scheme that superheated steam sent out from a steam boiler, a superheater and a temperature and pressure reducer or a back-pressure turbogenerator unit is sent into a steam heat machine for use after entering a steam/gas heat exchanger for tube-side heat exchange; hot air generated from the shell side of the heat exchanger is used for hot air heating technique in a hot air circulating closed-loop system composed of an electric heating chamber, a circulating blower and a baking chamber. The present invention has the advantages of power saving, energy saving, no pollution, little investment, convenient operation and maintenance and high temperature control quality; the present invention can replace original coal gas oil furnaces, electrical heating oil furnaces, hot oil burners and coal-burning air furnaces in the heating technique at the temperature more than 160DEG C in dyeing and printing industry.
Description
The present invention relates to a kind of heat supply process in the printing and dyeing industry, particularly superheated steam is implemented the technology of temperature difference graded supply.
In dyeing, heating process is divided by temperature generally can be divided into three levels: below 100 ℃; 100～160 ℃; 160～220 ℃.The thermal source of heating process below 160 ℃ is commonly steam, utilizes the latent heat of steam to adopt direct or indirect mode of heating.The steam use traffic is big, and load is steady, and pressure is low., a dyeing line, steam load is generally 6～12t/b.Pressure is below the 0.3Npa.Steam is originated most factories for providing low pressure or inferior middle pressure steam boiler for oneself, and output steam uses for dyeing process after generating electricity by pressure and temperature reducing or back pressure.Heating process more than 160 ℃ generally has heat radiation and hot air convection dual mode, decides according to the technological requirement of each process procedure.To adopting the technology of hot air convection mode of heating, as HEAT SETTING, bake, high temperature tentering etc., the thermal source that adopts has four kinds at present; Coal gas, electric heating, electric oil oven, hot-blast stove.All there is weak point separately in these four kinds of thermals source, and are as described below:
1, coal gas: urban gas supply anxiety, source of the gas are difficult to ensure; Self-control water-gas has quite strict safety requirements because one-time investment is big, and complex manufacturing need take bigger place, so general printing and dyeing enterprise is difficult to adopt.
2, electrical heating: electrical heating cleaning, pollution-free, control simple and easy.But because the supply of electric power wretched insufficiency, the electricity charge rise steadily, and the supply of electric power limit load, limit the quantity of, and make the board of many employing Electric heating be difficult to continuous operation.On heating quality, electrical heating exists that the heat supply temperature fluctuating range is bigger, and electric equipment acts frequently, the defective that heating quality is not high.Consider that from the angle of reasonable energy electricity is a kind of high-grade energy, be used to heat the quality waste that causes the energy.
3, hot oil furnace: hot oil furnace is to be fuel with coal, wet goods, is the heating equipment of heat carrier with the conduction oil.Adopt this mode heat supply, need special heating furnace worker-house, the heating equipment of part.Adopt this mode heat supply, need special heating furnace worker-house, be equipped with equipment such as a cover oil pump, storage tank, need the special messenger to operate, the blow-on heating-up time is longer, and operation has certain requirement.Conduction oil uses and contains certain toxicity, prevent from reliably to leak.Coal combustion, wet goods have certain pollution to environment.One-time investment is bigger economically, generally about 300,000 yuan.A complete set of system maintenance workload is bigger, and operating cost is also bigger.
4, coal-fired hot-blast stove: use the coal-fired hot-blast stove heat supply, need special worker-house, hot-blast stove with air feed and return air duct that larger cross-section will be arranged between the hot equipment, people's specialized operations be arranged, on adjustment fluctuation bigger, control difficult.Use comparatively difficulty on the heat supply process higher to temperature requirement, the Combustion of Hot Air Furnace smoke evacuation causes the pollution new to environment.Economically, one-time investment is bigger, and maintenance cost is higher.
At the weak point that above various heating thermals source exist, it is the heating thermal source that the present invention proposes with the superheated steam, adopts specific technological process and control corresponding, regulative mode and equipment, with more reasonable; More effective, more cost effective heat-supplying mode, the heating equipment that alternative former employing electrical heating is a thermal source has reached economize on electricity, has economized energy, improves heating quality, reduces heat cost, the purpose of simplification heating equipment operation.
The present invention program is following, and " saturated vapor that the steam boiler identical with traditional handicraft produces is superheated to superheated steam through superheater; carry out pressure and temperature reducing through back pressure type steam turbine generating set or temperature-decreased pressure reducer; before delivering to dyeing process; carry out vapour/gas heat exchange earlier; utilize the high temperature of steam to produce hot-air, the steam after the heat exchange is delivered to the printing and dyeing board again and used.The hot-air that heat exchange produces enters the hot blast flow process, forms closed cycle in hot equipment; After electrical heating, deliver to the baking chamber and be used for heating process, and then return heat exchanger.The steam of discharging after the heat exchange also can be provided with the second level even multi-stage heat exchanger and hot blast flow process as still having sufficient temp, further utilizes its temperature difference.As long as generally have 30 °-50 ° the temperature difference that one-level can be set.The steam of Pai Chuing at last is used for heating dyeing and printing process with vapour below 160 °.Steam behind the pressure and temperature reducing if any surplus, also can be established a bypass and directly enter and use vapour technology except that entering above-mentioned main flow.
In the relevant device of above-mentioned technology, steam boiler, superheater, temperature-decreased pressure reducer, back pressure type steam turbine generating set and between them air duct identical with the setting and the traditional handicraft of valve.Two kinds of reducing-and-cooling plants of temperature-decreased pressure reducer and back pressure type steam turbine generating set can only be established one of them, also can be provided with simultaneously.Main steam delivery tube road behind the reducing-and-cooling plant leads in order to change the vapour/gas heat exchanger tube side of hot blast through valve, and heat exchange is after sent to the printing and dyeing board by air bleeding valve.Circulation return air in vapour/gas heat exchanger shell pass enters the electrical heating chamber, delivers to the baking chamber by circulating fan and is used for technology, returns vapour/gas heat exchanger then and forms closed cycle.Above closed circuit generally is installed in in the hot board body.Before heat exchange process, bypath valve and pipeline are set, the steam drain of straight-through heat exchanger discharges unnecessary superheated steam with bypass.When needs were provided with two-stage and heat exchange more than the two-stage and hot blast flow process, the steam inlet pipe of next stage heat exchanger linked to each other with previous stage heat exchanger blast pipe.Heat exchanger can be commercially available vapour/gas heat exchanger, also can have a narrow range of temperature, need dustproof and windage to want characteristics design specialized heat exchanger such as little according to this technology.
Adopt " superheated steam temperature difference heating process classification " technology at dyeing, compare, have following tangible characteristics with other heat-supplying mode:
1, economize on electricity.Adopt this technology, can directly substitute mode heat supplies such as former electrical heating, coal gas, hot oil furnace, hot-blast stove, can save 75%～98% electric power.
2, economize energy.A heat dissipation 8.5 * 10
4The hot equipment in kilojoule/time adopts this technology, can save about 300 tons in mark coal every year.
3, pollution-free.
4, small investment.Investment has only about 1/3 of hot oil furnace or hot-blast stove.Substitute electrical heating with this mode, can recoup capital outlay in 1 year.
5, volume is little.The equipment that this technology is required generally can be installed in former board body, need not to take new space.
6, easy to operate, operation, maintenance cost is low.
7, temperature control quality height.Adopt this system, temperature fluctuation can be controlled in ± 1.5 ℃ of scopes in.
8, be easy to adopt.Required newly added equipment is a common apparatus, is convenient to manufacture and design.
Now be described further with embodiment in conjunction with the accompanying drawings.
Fig. 1 is a process chart of the present invention;
Fig. 2 is vapour/gas heat exchanger structure schematic diagram.
With reference to Fig. 1, in this heat supply process, produce saturated vapor by steam boiler (1), be superheated to superheated steam through superheater (2), through back pressure type steam turbine generating set (3) (4) or temperature-decreased pressure reducer (5), send to heating board (7) by main steam supply pipe (6), vapour/gas heat exchanger (8) in order to the conversion hot blast generally is installed in in hot board (7) body, when vapour/vapour heat exchanger (8) is worked, steam bypass valve (9) is closed, superheated steam enters vapour/gas heat exchanger (8) tube side through steam supply valve (10), is sent to printing and dyeing board steam line (12) by exhaust steam valve (11) after heat exchange, respectively uses with the hot equipment of vapour for other.Hot blast flow process (13) forms closed cycle in hot equipment (7).Circulation return air heats up through vapour/gas heat exchanger (8) shell side heat exchange, through electrical heating chamber (14), delivers to baking chamber (16) by circulating fan (15) and is used for technology.(17) be muddy air exhaust outlet, (18) are that fresh air replenishes mouth naturally, the fresh air and the exhaust air box balance of replenishing mouth, the cleanliness factor of maintenance circulating air.(19) be circulated air internal shunt control valve, in order to regulate hot blast temperature.
The control system of this technology is used and is divided the process control principle, adopts " steam diversion heat supply, the electric heating fine setting replenishes, the hot blast short circuit is regulated ", is the closed circuit Control Circulation system of main control parameter with the technological temperature.
This technology equipment needed thereby is except that content shown in Figure 1, vapour/gas heat exchanger should consider that dustiness is bigger in the printing and dyeing industry hot blast, and the temperature difference is less during vapour/gas heat exchange, requires the heat exchanger windage less again simultaneously, therefore adopt tubular heat exchanger, the outer wall of its tubulation should polish to reduce dirt long-pending simultaneously.LGR type vapour/gas-heat exchanger for example, structure as shown in Figure 2, wherein (21) are steam inlet pipe; (22) be gland steam exhauster; (23) be the heat exchanger front header; (24) be front tube sheet; (25) be drain port; (26) be heat exchanger tube; (27) be back tube sheet; (28) be rear header; (29) be evacuation port; (30) be deep bead.
This technology is used on the Chinese People's Liberation Army's the 3503 factory's printing and dyeing workshop heat setting machine at present.The heat exchanger inlet steam temperature is 240～250 ℃, and outlet steam temperature is about 250 ℃, and the setting process temperature is 199 ± 1 ℃.The board power consumption by original 240 kilowatts/time reduce to 60～0 kilowatts/time, power saving rate is 75～100%.
Claims (3)
1, a kind of superheated steam temperature difference heating process classification, after decompression, deliver to the printing and dyeing board by the superheated steam that steam boiler and superheater produce, equipment work for using vapour heat is characterized in that: before delivering to the printing and dyeing board, earlier with superheated steam through vapour/gas heat exchange, delivering to the printing and dyeing board again uses, the hot-air that heat exchange produces enters the hot blast flow process, forms closed cycle in hot equipment, that is: vapour/gas heat exchange heats up, deliver to the baking chamber after the electrical heating and be used for technology, return vapour/gas heat exchanger again.
2, according to the described superheated steam temperature difference of claim 1 heating process classification, it is characterized in that: the pressure and temperature reducing of superheated steam carries out with the back pressure type steam turbine generation mode or by temperature-decreased pressure reducer, is provided with muddy air in the hot blast flow process and discharges and additional function of fresh air and circulated air internal shunt regulative mechanism.
3, according to claim 1 or 2 described superheated steam temperature difference heating process classifications, it is characterized in that: outside the hot air circulation flow process, be provided with the bypass flow process of utilizing excess steam, the steam discharge of excess steam after heat exchange sent into the steam heater platform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89102458 CN1033598C (en) | 1989-10-13 | 1989-10-13 | Technology for overheat steam temp. difference graded supply and its apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89102458 CN1033598C (en) | 1989-10-13 | 1989-10-13 | Technology for overheat steam temp. difference graded supply and its apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1041625A CN1041625A (en) | 1990-04-25 |
| CN1033598C true CN1033598C (en) | 1996-12-18 |
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ID=4854731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89102458 Expired - Fee Related CN1033598C (en) | 1989-10-13 | 1989-10-13 | Technology for overheat steam temp. difference graded supply and its apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1033598C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100357659C (en) * | 2005-07-26 | 2007-12-26 | 保廷荣 | Coupled and heat-exchange heat supply with wide-range output |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105366750B (en) * | 2015-12-04 | 2017-09-15 | 淮安万邦香料工业有限公司 | Steam hierarchy system |
| CN107035446A (en) * | 2017-01-20 | 2017-08-11 | 吕桐华 | The method that coal-fired thermal oil furnace is substituted with afterheat steam |
-
1989
- 1989-10-13 CN CN 89102458 patent/CN1033598C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100357659C (en) * | 2005-07-26 | 2007-12-26 | 保廷荣 | Coupled and heat-exchange heat supply with wide-range output |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1041625A (en) | 1990-04-25 |
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