CN204007229U - The high-efficiency evaporator with natural circulation - Google Patents
The high-efficiency evaporator with natural circulation Download PDFInfo
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- CN204007229U CN204007229U CN201420503962.4U CN201420503962U CN204007229U CN 204007229 U CN204007229 U CN 204007229U CN 201420503962 U CN201420503962 U CN 201420503962U CN 204007229 U CN204007229 U CN 204007229U
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Abstract
A kind of high-efficiency evaporator with natural circulation, it comprises housing (1), heat-exchanging tube bundle (2), drum (3) and tube sheet (4), the two ends of heat-exchanging tube bundle (2) are positioned in housing (1) by tube sheet (2), drum (3) is arranged on the top of housing (1), bottom or the side of housing (1) are provided with cold fluid import, hot fluid flows into heat-exchanging tube bundle from one end of housing through tube sheet, from the tube sheet of the heat-exchanging tube bundle inflow housing other end, flow out outside housing again, the bottom that it is characterized in that described housing (1) is provided with assisted heating device (5), the entrance point of assisted heating device (5) is connected with enclosure interior liquid storage district by down-comer (6), the port of export of assisted heating device (5) is connected with housing (1) inside.The utility model is simple in structure, easily manufactured, can improve heat exchange efficiency more than 30%.
Description
Technical field
The utility model relates to a kind of chemical industry equipment, the heat recovery equipment that the fields such as especially a kind of petrochemical industry, thermoelectricity electric power, metallurgy, Thermal Power Engineering are used, specifically a kind of high-efficiency evaporator of natural circulation.
Background technology
At present, evaporimeter has multiple in the market, natural-circulation evaporator is the important evaporimeter of a class, be divided into evaporator with horizontal tubes, calandria type evaporator, basket-type evaporator, external heating type evaporator (heating clamber is placed in outside vaporization chamber), levin evaporator and (above heating clamber, set up boiling-house, and thick and high liquid circulating pipe is set) etc. multiple, and for various environment and medium.But according to the knowledge of the applicant, existing natural-circulation evaporator ubiquity complex structure, efficiency is low, can not realize the problem of Natural Circulation truly.
Summary of the invention
The purpose of this utility model is for existing natural-circulation evaporator complex structure, inefficient problem, design a kind of simple in structure, the high-efficiency evaporator of the natural circulation that efficiency is high.
The technical solution of the utility model is:
A kind of high-efficiency evaporator with natural circulation, it comprises housing 1, heat-exchanging tube bundle 2, drum 3 and tube sheet 4, the two ends of heat-exchanging tube bundle 2 are positioned in housing 1 by tube sheet 2, drum 3 is arranged on the top of housing 1, the bottom of housing 1 or side are provided with cold fluid import, hot fluid flows into heat-exchanging tube bundle from one end of housing through tube sheet, from the tube sheet of the heat-exchanging tube bundle inflow housing other end, flow out outside housing again, the bottom that it is characterized in that described housing 1 is provided with assisted heating device 5, the entrance point of assisted heating device 5 is connected with enclosure interior liquid storage district by down-comer 6, the port of export of assisted heating device 5 is connected with housing 1 inside, from cold fluid entrance point, entering the vaporization of enclosure interior heat exchange rear portion enters drum, the other end not completely vaporization or condensed cold fluid through down-comer 6 enter assisted heating device 5 again heat rising enter in housing, under the effect of the temperature difference, complete Natural Circulation, the vaporization that enters the turbulization cold fluid that further strengthening enters from cold fluid entrance point in housing uphill process through the part cold fluid of assisted heating device 5 heating and gasifyings, to improve the coefficient of heat transfer of shell side.
When described hot fluid temperature surpasses 450 ℃, tube sheet 4 is thin tubesheet, to reduce the thermal stress between tube bank and tube sheet, housing.
Described heat-exchanging tube bundle is straight tube or U-shaped pipe.
The quantity of described assisted heating device 5 is at least one.
The beneficial effects of the utility model:
Hot fluid of the present utility model is passed to heat by heat-exchanging tube bundle the cold medium of shell side, simultaneously by the thermal medium of the heating tube in assisted heating device, by the cold dielectric heating of evaporimeter bottom precipitation, cold medium is by being formed on the perpendicular flow of heat-exchanging tube bundle communicating pipe, thereby obtains efficient heat transfer coefficient.
The utility model can be used in ammonia, methanol synthesizer, can obviously reduce energy consumption.
The utility model device structure is simple, can save steel and investment, raising utilization rate of equipment and installations.
Heat exchange efficiency of the present utility model can improve more than 30%.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model, and Fig. 1 (a) is front view, and Fig. 1 (b) is side view.
Fig. 2 is the structural representation of methanol evaporator of the present utility model.
Fig. 3 is the structural representation of ammonia evaporator of the present utility model.
The specific embodiment
Below in conjunction with drawings and Examples, the utility model is further described.
As Fig. 1.
A kind of high-efficiency evaporator with natural circulation, it comprises housing 1, heat-exchanging tube bundle 2(can adopt straight tube or U-shaped pipe), when drum 3 and tube sheet 4(hot fluid temperature surpass 450 ℃, tube sheet 4 can adopt thin tubesheet, to reduce tube bank and tube sheet, thermal stress between housing), the two ends of heat-exchanging tube bundle 2 are positioned in housing 1 by tube sheet 2, drum 3 is arranged on the top of housing 1, the bottom of housing 1 or side are provided with cold fluid import, hot fluid flows into heat-exchanging tube bundle from one end of housing through tube sheet, from the tube sheet of the heat-exchanging tube bundle inflow housing other end, flow out outside housing again, it is two that the bottom of described housing 1 is provided with in one or more assisted heating device 5(Fig. 1, during concrete enforcement, also can arrange as required), the entrance point of assisted heating device 5 is connected with enclosure interior liquid storage district by down-comer 6, the port of export of assisted heating device 5 is connected with housing 1 inside, from cold fluid entrance point, entering the vaporization of enclosure interior heat exchange rear portion enters drum, the other end not completely vaporization or condensed cold fluid through down-comer 6 enter assisted heating device 5 again heat rising enter in housing, under the effect of the temperature difference, complete Natural Circulation, the vaporization that enters the turbulization cold fluid that further strengthening enters from cold fluid entrance point in housing uphill process through the part cold fluid of assisted heating device 5 heating and gasifyings, to improve the coefficient of heat transfer of shell side.As shown in Figure 1, evaporimeter of the present utility model, by auxiliary heating pipe and communicating pipe cold fluid heating being formed to natural circulation at shell side, strengthens cold fluid in the turbulent flow of tube bank, improves the heat transfer coefficient of shell side.Hot fluid is passed to heat by heat-exchanging tube bundle 2 the cold medium of shell side, simultaneously by the thermal medium of the heating tube in assisted heating device 5, by the cold dielectric heating of evaporimeter bottom precipitation, cold medium is by being formed on the perpendicular flow of heat-exchanging tube bundle communicating pipe, thereby obtains efficient heat transfer coefficient.
example 1.
As shown in Figure 2.
The present embodiment is the application of methanol-to-olefins device methanol evaporator, from the 1.0 ~ 2.0MPaA normal temperature methyl alcohol outside battery limit (BL), after being preheated to 100 ℃, enter methanol evaporator, obtain 137 ~ 157 ℃, the methanol steam of 1.0 ~ 1.6MPaA with high temperature, hydrocarbon fluid (250 ~ 300 ℃, 0.12 ~ 0.3MPaA) heat exchange after methanol to olefins reaction device, high temperature, hydrocarbon fluid temperature (F.T.) is down to 150 ~ 170 ℃ simultaneously.The setting of the middle pressure steam (1.0 ~ 2.5MPa) by methanol evaporator bottom, make methanol liquid outside heat-exchanging tube bundle, form upper and lower Natural Circulation convection current, heat transfer coefficient increases by 25% ~ 30%, make the end face temperature difference of methyl alcohol and high temperature, hydrocarbon fluid be down to 8 ~ 10 ℃ from 15 ~ 25 ℃, improve the rate of recovery of heat energy, saved the heat exchange area of equipment.
example 2.
As shown in Figure 3.
The present embodiment is the application of ammonolysis product processing unit (plant) ammonia evaporator, from the 1.0 ~ 2.0MPaA normal temperature liquefied ammonia outside battery limit (BL), after being decompressed to 0.5 ~ 0.7MPaA, enter ammonia evaporator, hot fluid (250 ~ 300 ℃, the 0.12 ~ 0.3MPaA) heat exchange coming with device obtains 4 ~ 12 ℃, the gas ammonia of 0.5 ~ 0.7MPaA, and hot fluid temperature is down to 25 ~ 40 ℃ simultaneously.The setting of the auxiliary heating parts of the low-pressure steam (0.6 ~ 1.0MPa) by ammonia evaporator bottom, make liquefied ammonia outside heat-exchanging tube bundle, form upper and lower Natural Circulation convection current, heat transfer coefficient increases by 20% ~ 25%, has reduced the heat exchange area of equipment, the investment of having saved equipment.
The utility model does not relate to partly all prior aries that maybe can adopt same as the prior art to be realized.
Claims (4)
1. a high-efficiency evaporator with natural circulation, it comprises housing (1), heat-exchanging tube bundle (2), drum (3) and tube sheet (4), the two ends of heat-exchanging tube bundle (2) are positioned in housing (1) by tube sheet (2), drum (3) is arranged on the top of housing (1), bottom or the side of housing (1) are provided with cold fluid import, hot fluid flows into heat-exchanging tube bundle from one end of housing through tube sheet, from the tube sheet of the heat-exchanging tube bundle inflow housing other end, flow out outside housing again, the bottom that it is characterized in that described housing (1) is provided with assisted heating device (5), the entrance point of assisted heating device (5) is connected with enclosure interior liquid storage district by down-comer (6), the port of export of assisted heating device (5) is connected with housing (1) inside, from cold fluid entrance point, entering the vaporization of enclosure interior heat exchange rear portion enters drum, the other end not completely vaporization or condensed cold fluid through down-comer (6) enter assisted heating device (5) again heat rising enter in housing, under the effect of the temperature difference, complete Natural Circulation, the vaporization that enters the turbulization cold fluid that further strengthening enters from cold fluid entrance point in housing uphill process through the part cold fluid of assisted heating device (5) heating and gasifying, to improve the coefficient of heat transfer of shell side.
2. the high-efficiency evaporator with natural circulation according to claim 1, while it is characterized in that described hot fluid temperature surpasses 450 ℃, tube sheet (4) is thin tubesheet, to reduce the thermal stress between tube bank and tube sheet, housing.
3. the high-efficiency evaporator with natural circulation according to claim 1, is characterized in that described heat-exchanging tube bundle is straight tube or U-shaped pipe.
4. the high-efficiency evaporator with natural circulation according to claim 1, is characterized in that the quantity of described assisted heating device (5) is at least one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420503962.4U CN204007229U (en) | 2014-09-02 | 2014-09-02 | The high-efficiency evaporator with natural circulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420503962.4U CN204007229U (en) | 2014-09-02 | 2014-09-02 | The high-efficiency evaporator with natural circulation |
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| CN204007229U true CN204007229U (en) | 2014-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420503962.4U Active CN204007229U (en) | 2014-09-02 | 2014-09-02 | The high-efficiency evaporator with natural circulation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107131771A (en) * | 2017-04-07 | 2017-09-05 | 苏州安利化工有限公司 | The guard method of esterification condensator tube sheet |
| 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 |
-
2014
- 2014-09-02 CN CN201420503962.4U patent/CN204007229U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107131771A (en) * | 2017-04-07 | 2017-09-05 | 苏州安利化工有限公司 | The guard method of esterification condensator tube sheet |
| 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 |
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