CN203744754U - Low low-pressure condensate flash-off steam condenser and system for MTP device - Google Patents
Low low-pressure condensate flash-off steam condenser and system for MTP device Download PDFInfo
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- CN203744754U CN203744754U CN201320697986.3U CN201320697986U CN203744754U CN 203744754 U CN203744754 U CN 203744754U CN 201320697986 U CN201320697986 U CN 201320697986U CN 203744754 U CN203744754 U CN 203744754U
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- lime set
- condenser
- steam
- stram condenser
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Abstract
The utility model relates to a low low-pressure condensate flash-off steam condenser and system for an MTP device, and aims to provide the low low-pressure condensate flash evaporation system with low investment and stability in operation. Steam inlets and emptying openings are formed in the top of the steam condenser; a condensate outlet is formed in the bottom of the steam condenser; a heat exchange pipeline is arranged in the middle of the steam condenser; a refrigerant inlet is formed in one end of the heat exchange pipeline; a refrigerant outlet is formed in the other end of the heat exchange pipeline; the steam outlet of the condensate flash tank is connected with the vapor inlet of the steam condenser; the condensate outlet of the steam condenser is connected with the condensate inlet of the condensate flash tank.
Description
Technical field
The utility model relates to a kind of improved MTP device low pressure lime set flash-off steam condenser and system, to solve in prior art the problem such as lime set refluence, drain water outlet, fluctuation of service in low pressure lime set flash-off steam condenser.
Background technology
At present, in existing MTP device, low pressure lime set flash-off steam condenser all adopts fixed tube sheet type, as shown in Figure 1, cold medium is desalted water, walks tube side, existing design, in order to simplify pipe arrangement, the steam flashing off from lime set flash tank enters this condenser from bottom through steam inlet S1, be desalted cooling, condensation, then returns to lime set flash tank from lime set outlet S2.For fear of flash-off steam from lime set, outlet enters condenser, when pipe arrangement, consider the fluid-tight of 1500mm, at the top of this condenser shell port of export, drain S3 is set in addition, connect blow-down pipe and directly arrange atmosphere, during with the fixed gas in guarantee system or high load capacity, the solidifying steam not getting off is discharged in time, and in existing low pressure lime set flash-off steam condenser, drain S3 is directly over lime set outlet S2, coexist between last piece deflection plate and tube sheet, as shown in Figure 2.
Existing condenser pattern and low pressure lime set flash system are unreasonable, make this device drive time because cold rate-of flow is low, flash tank flash distillation amount is large, cause flash-off steam system cannot form stable flowing always, constantly there is lime set to flow into flash tank from steam inlet S1, also frequently there is lime set to discharge from drain S3, the pressure of flash tank constantly rises, operate extremely unstable, in addition, existing condenser pressure drop is larger, and dew point reduces obviously, and the logarithmic mean temperature difference (LMTD) of the cold and hot media of both sides of condenser is less, the heat exchange area needing is large, and equipment investment expense is high.
Therefore, in the urgent need to existing low pressure lime set flash-off steam condenser and low pressure lime set flash system are improved, to solve in prior art the problem such as lime set refluence, drain water outlet, fluctuation of service in low pressure lime set flash-off steam condenser.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of invest MTP device low pressure lime set flash-off steam condenser and system low, stable operation.
For reaching above-mentioned purpose, the utility model MTP device low pressure lime set flash-off steam condenser, described stram condenser top is provided with steam inlet and drain, bottom is provided with lime set outlet, centre is provided with heat exchange pipeline, and described heat exchange pipeline one end is cryogen entrance, and the other end is cryogen outlet.
Wherein said stram condenser steam inlet is two, lays respectively at both sides, described stram condenser top, and described drain is between two described stram condenser steam inlets.
Wherein said stram condenser lime set outlet is positioned at centre position, described stram condenser bottom.
Wherein said drain is more than two, lays respectively between described stram condenser steam inlet and the outlet of described stram condenser lime set.
A kind of MTP device low pressure lime set flash system, comprise low pressure lime set stram condenser and lime set flash tank, it is characterized in that: described stram condenser top is provided with steam inlet and drain, bottom is provided with lime set outlet, centre is provided with heat exchange pipeline, and described heat exchange pipeline one end is cryogen entrance, and the other end is cryogen outlet, described lime set flash tank steam (vapor) outlet connects described stram condenser steam inlet, and described stram condenser lime set outlet connects described lime set flash tank lime set entrance.
Wherein said stram condenser steam inlet is two, lay respectively at both sides, described stram condenser top, described lime set flash tank steam (vapor) outlet connects respectively described stram condenser steam inlet, and described drain is between two described stram condenser steam inlets.
Wherein said lime set flash tank steam (vapor) outlet connects respectively described stram condenser steam inlet by reducer tee.
Wherein said stram condenser lime set outlet is positioned at centre position, described stram condenser bottom, and described stram condenser lime set outlet connects described lime set flash tank lime set entrance.
Wherein said drain is more than two, lays respectively between described stram condenser steam inlet and the outlet of described stram condenser lime set.
The utility model MTP device low pressure lime set flash-off steam condenser and system difference from prior art are that the utility model obtained following technique effect:
1, a kind of MTP device low pressure lime set flash-off steam condenser of the utility model and system, the flow of each steam inlet side is the half of existing condenser steam inlet flow, and flow process has shortened half, greatly reduce like this shell fluid by the pressure drop of condenser, the dew point of steam is unlikely to reduce too many, for this condenser, improve heat transfer temperature difference, can reduce heat exchange area, reduced investment, meanwhile, the more high lime set that is more beneficial to of outlet lime set pressure is recharged;
2, a kind of MTP device low pressure lime set flash-off steam condenser of the utility model and system, steam inlet pipeline is introduced from top, and lime set can not be discharged from entrance; Drain exports away from lime set, near steam inlet, has not only reduced steam enters condenser possibility from lime set outlet, fixed gas can also be discharged in time;
3, a kind of MTP device of the utility model low pressure lime set flash-off steam condenser, can make lime set flash tank and stram condenser system stable operation, reduces the loss of water, heat, reduces the possibility of flash tank superpressure.
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Brief description of the drawings
Fig. 1 is existing MTP low pressure lime set flash system schematic diagram;
Fig. 2 is existing MTP low pressure lime set flash-off steam condenser structure schematic diagram figure;
Fig. 3 is MTP low pressure lime set flash system schematic diagram of the present utility model;
Fig. 4 is MTP low pressure lime set flash-off steam condenser structure schematic diagram of the present utility model.
Description of reference numerals: 1-stram condenser; 2-lime set flash tank; S1, S1A, S1B-stram condenser steam inlet; The outlet of S2-stram condenser lime set; S3, S3A, S3B-drain; T1-cryogen entrance; The outlet of T2-cryogen.
Detailed description of the invention
Below in conjunction with drawings and Examples, technical characterictic and the advantage with other above-mentioned to the utility model are described in more detail.
The utility model MTP device low pressure lime set flash-off steam condenser and system, stram condenser 1 is provided with two stram condenser steam inlet S1A and S1B, stram condenser lime set outlet S2, two drain S3A and S3B, cryogen entrance T1, heat exchange pipeline and cryogen outlet T4, two stram condenser steam inlet S1A and S1B are located at respectively stram condenser 1 both sides, top, the steam (vapor) outlet of lime set flash tank 2 connects described two stram condenser steam inlet S1A and S1B, stram condenser lime set outlet S2 is located at stram condenser 1 centre position, bottom and is connected with the lime set entrance of lime set flash tank 2, two drain S3A and S3B are located between stram condenser two, 1 top stram condenser steam inlet S1A and S1B, drain S3A is between stram condenser steam inlet S1A and stram condenser lime set outlet S2, drain S3B is between stram condenser steam inlet S1B and stram condenser lime set outlet S2, drain S3A, S3B is respectively apart from two baffle(s) spacings of stram condenser lime set outlet S2, from the steam of lime set flash tank 2 Trunk Line of first flowing through, pass through reducer tee, flow through respectively after two arms, enter stram condenser 1 through two stram condenser steam inlet S1A and S1B again, with after the interior heat exchange pipeline condensation by contact that has cryogen, converge and return to lime set flash tank 2(cryogen desalted water and enter stram condenser 1 pipe side by cryogen entrance T1 through stram condenser lime set outlet S2 mouth, by cryogen outlet, T2 flows out), fixed gas in steam is discharged from two drain S3A and S3B respectively, but arm size after reducer tee is less than Trunk Line keeps circulation area to be not less than the circulation area of Trunk Line.
Embodiment 1
In the MTP device of 500000 tons/year of propylene scales, the low pressure lime set flash-off steam condenser in normal pressure lime set flash system, the quantity of steam coming from flash tank is 46.8t/h, inlet temperature is 102 DEG C, pressure is 99KPa, requires 98 DEG C of outlet temperatures, and allowable pressure drop is 5KPa; The out temperature of cold medium desalted water is respectively 49 DEG C and 87 DEG C.
Adopt existing stram condenser structure to design, calculating pressure drop is 14KPa, and logarithmic mean temperature difference (LMTD) is 23.5 DEG C, and required heat exchange area is 1190m
2;
Adopt the utility model MTP device low pressure lime set flash-off steam condenser to design, calculating pressure drop is 2KPa, and logarithmic mean temperature difference (LMTD) is 26.2 DEG C, and required heat exchange area is 950m
2;
Therefore, under industrial operation condition described in this embodiment, a kind of MTP device of the utility model low pressure lime set flash-off steam condenser, compared with existing stram condenser, pressure drop reduces 12KPa, and required heat exchange area reduces approximately 20%.The stram condenser that the utility model proposes, not only has advantage from area, reduces equipment investment, and low pressure drop has been equivalent to increase lime set and returns the power of tank, is more conducive to the stable operation of system.
Embodiment 2
In 800000 tons/year of ethylene units, the low pressure lime set flash-off steam condenser in normal pressure lime set flash system, the quantity of steam coming from flash tank is 21.43t/h, and inlet temperature is 105 DEG C, and pressure is 120KPa, requires 100 DEG C of outlet temperatures, and allowable pressure drop is 20KPa; The out temperature of cold medium desalted water is respectively 54 DEG C and 92 DEG C.
Adopt existing stram condenser structure to design, calculating pressure drop is 13KPa, and logarithmic mean temperature difference (LMTD) is 25.1 DEG C, and required heat exchange area is 791m
2;
The stram condenser that adopts the utility model to propose designs, and calculating pressure drop is 2KPa, and logarithmic mean temperature difference (LMTD) is 26.9 DEG C, and required heat exchange area is 712m
2;
Therefore, under industrial operation condition described in this embodiment, a kind of MTP device of the utility model low pressure lime set flash-off steam condenser, compared with existing stram condenser, pressure drop reduces 10kPa, and required heat exchange area reduces approximately 10%.The stram condenser that the utility model proposes, not only has advantage from area, reduces equipment investment, and low pressure drop has been equivalent to increase lime set and returns the power of tank, is more conducive to the stable operation of system.
The setting of fixed gas drain in addition, can make fixed gas discharge in time, is not only conducive to reduce condensation thermal resistance, and can not cause condenser superpressure because fixed gas gathers, and makes system operation unstable, even makes condenser lose efficacy.
Above-described embodiment is described preferred embodiment of the present utility model; not scope of the present utility model is limited; do not departing under the prerequisite of the utility model design spirit; various distortion and improvement that those of ordinary skill in the art make the technical solution of the utility model, all should fall in the definite protection domain of the utility model claims.
Claims (9)
1. a MTP device low pressure lime set flash-off steam condenser, it is characterized in that: described stram condenser top is provided with steam inlet and drain, bottom is provided with lime set outlet, and centre is provided with heat exchange pipeline, described heat exchange pipeline one end is cryogen entrance, and the other end is cryogen outlet.
2. MTP device low pressure lime set flash-off steam condenser according to claim 1, it is characterized in that: described stram condenser steam inlet is two, lay respectively at both sides, described stram condenser top, described drain is between two described stram condenser steam inlets.
3. MTP device low pressure lime set flash-off steam condenser according to claim 2, is characterized in that: described stram condenser lime set outlet is positioned at centre position, described stram condenser bottom.
4. MTP device low pressure lime set flash-off steam condenser according to claim 3, is characterized in that: described drain is more than two, lays respectively between described stram condenser steam inlet and the outlet of described stram condenser lime set.
5. a MTP device low pressure lime set flash system, comprise low pressure lime set stram condenser and lime set flash tank, it is characterized in that: described stram condenser top is provided with steam inlet and drain, bottom is provided with lime set outlet, centre is provided with heat exchange pipeline, and described heat exchange pipeline one end is cryogen entrance, and the other end is cryogen outlet, described lime set flash tank steam (vapor) outlet connects described stram condenser steam inlet, and described stram condenser lime set outlet connects described lime set flash tank lime set entrance.
6. MTP device low pressure lime set flash system according to claim 5, it is characterized in that: described stram condenser steam inlet is two, lay respectively at both sides, described stram condenser top, described lime set flash tank steam (vapor) outlet connects respectively described stram condenser steam inlet, and described drain is between two described stram condenser steam inlets.
7. MTP device low pressure lime set flash system according to claim 6, is characterized in that: described lime set flash tank steam (vapor) outlet connects respectively described stram condenser steam inlet by reducer tee.
8. MTP device low pressure lime set flash system according to claim 6, it is characterized in that: described stram condenser lime set outlet is positioned at centre position, described stram condenser bottom, described stram condenser lime set outlet connects described lime set flash tank lime set entrance.
9. MTP device low pressure lime set flash system according to claim 8, is characterized in that: described drain is more than two, lays respectively between described stram condenser steam inlet and the outlet of described stram condenser lime set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320697986.3U CN203744754U (en) | 2013-11-06 | 2013-11-06 | Low low-pressure condensate flash-off steam condenser and system for MTP device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320697986.3U CN203744754U (en) | 2013-11-06 | 2013-11-06 | Low low-pressure condensate flash-off steam condenser and system for MTP device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103557717A (en) * | 2013-11-06 | 2014-02-05 | 中国寰球工程公司 | Low-low-pressure condensate flash evaporation steam condenser and system for MTP (Methanol to Propylene) device |
| CN103557717B (en) * | 2013-11-06 | 2016-11-30 | 中国寰球工程公司 | A kind of MTP device low pressure lime set flash-off steam condenser and system |
-
2013
- 2013-11-06 CN CN201320697986.3U patent/CN203744754U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103557717A (en) * | 2013-11-06 | 2014-02-05 | 中国寰球工程公司 | Low-low-pressure condensate flash evaporation steam condenser and system for MTP (Methanol to Propylene) device |
| CN103557717B (en) * | 2013-11-06 | 2016-11-30 | 中国寰球工程公司 | A kind of MTP device low pressure lime set flash-off steam condenser and system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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Address after: Two road 100012 Beijing city Chaoyang District high tech Industrial Park, No. 1. Patentee after: CHINA HUANQIU CONTRACTING & ENGINEERING Co.,Ltd. Address before: Two road 100012 Beijing city Chaoyang District, high-tech Industrial Park No. 1 building D Room 204. Patentee before: China Huanqiu Contracting & Engineering Corp. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140730 Termination date: 20211106 |