CN212133340U - Steam-water separator and steam heat exchanger group - Google Patents
Steam-water separator and steam heat exchanger group Download PDFInfo
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- CN212133340U CN212133340U CN202020430792.7U CN202020430792U CN212133340U CN 212133340 U CN212133340 U CN 212133340U CN 202020430792 U CN202020430792 U CN 202020430792U CN 212133340 U CN212133340 U CN 212133340U
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Abstract
The utility model discloses a steam-water separator and a steam heat exchanger group, wherein the steam-water separator comprises a separation pipe, the separation pipe comprises a contraction section and expansion ends which are respectively connected with the two ends of the contraction section, the minimum inner diameter of the expansion ends is equal to the inner diameter of the contraction section, and a shunting hole is arranged in the contraction section; the steam heat exchanger group formed by the steam-water separator comprises a system steam main pipeline and two branch pipelines connected with the system steam main pipeline, wherein the two branch pipelines are respectively connected with the No. 1 heat exchanger and the No. 2 heat exchanger; the No. 1 heat exchanger is connected with the No. 1 steam-water separator, and a high-temperature condensate outlet of the No. 1 steam-water separator is connected with the No. 2 heat exchanger; the heat exchanger 2 is connected with the steam-water separator 2, and the high-temperature condensate outlet of the steam-water separator 2 is connected with the liquid storage tank, so that steam heat is fully utilized, the problem of large residual heat of condensed water after heat exchange of the steam heat exchanger group is solved, steam consumption is reduced, the purposes of energy conservation and emission reduction are achieved, and economic benefits are improved.
Description
Technical Field
The utility model relates to a heat exchange field especially relates to a catch water and steam heat exchanger group.
Background
The heating process is a common process in the fields of oil refining, petrifaction, chemical industry, steel, metallurgy, electric power, thermoelectricity, pharmacy, light industry and the like. Wherein, the steam has the characteristics of no toxicity, no pollution, easy transmission, easy control and the like, and is widely applied to the heating process.
Steam is generated by burning and heating water by fossil fuels such as coal, oil, gas and the like; in oil refining and petrochemical enterprises, the consumption of steam accounts for about 60% of the energy consumption of the enterprises. Wherein the heating steam accounts for about 70% of the whole steam consumption, and most heating processes are realized by a heat exchanger.
Fig. 1 is a system diagram of a conventional steam heat exchanger set, wherein the relationship between the working pressure P1 of the heat exchanger No. 1, the working pressure P2 of the heat exchanger No. 2 and the working pressure P3 of a liquid storage tank is P1> P2> P3, two heat exchangers respectively consume steam and condense into water to enter the liquid storage tank for unified recovery, and since the steam is condensed into water and still has a large amount of heat, and the higher the working pressure is, the larger the residual heat is, for example, the heat contained in the condensed water at 0.5MPa accounts for 21% of the original steam heat, and the heat contained in the condensed water at 10MPa accounts for 39% of the original steam heat, the problem of energy waste exists in the current process system, and the maximization of energy utilization cannot be achieved.
With the continuous expansion of industrial scale, the energy consumption is larger and larger, and a great amount of waste of fossil energy can be brought. Therefore, heat energy is efficiently utilized among the heat exchangers, the consumption of steam can be greatly reduced, and the economic benefit and the social benefit of energy conservation and emission reduction are achieved.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a catch water and steam heat exchanger group to solve the problem that above-mentioned prior art exists, make steam heat make full use of, solved the big problem of steam heat exchanger group heat transfer back comdenstion water surplus heat.
In order to achieve the above object, the utility model provides a following scheme: the utility model provides a steam-water separator, including the separator tube, the separator tube includes the shrink section and expands the end that is connected with shrink section both ends respectively, and the minimum internal diameter that expands the end equals the internal diameter of shrink section, is provided with the reposition of redundant personnel hole in the shrink section.
Preferably, the enlarged end is of a conical structure, and a spiral diversion trench is formed in the conical surface of the enlarged end.
Preferably, the two ends of the separation pipe are provided with flange structures, and mounting holes are uniformly distributed on the periphery of each flange structure.
Preferably, the splitter orifice is arranged coaxially with the separator tube.
The utility model also provides a steam heat exchanger group, which comprises a system steam main pipeline and two branch pipelines connected with the system steam main pipeline, wherein the two branch pipelines are respectively connected with the No. 1 heat exchanger and the No. 2 heat exchanger; the No. 1 heat exchanger is connected with the No. 1 steam-water separator, and a high-temperature condensate outlet of the No. 1 steam-water separator is connected with the No. 2 heat exchanger; no. 2 heat exchanger links to each other with No. 2 catch water, and No. 2 catch water's high temperature condensate outlet links to each other with the liquid storage pot.
Preferably, the pressure of the condensate discharged from the No. 1 steam-water separator is greater than the working pressure of the No. 2 heat exchanger.
Preferably, the system steam main pipeline is provided with a regulating valve, and the branch pipeline is provided with a regulating valve.
Preferably, the liquid storage tank is provided with a condensate outlet.
The utility model discloses for prior art gain following technological effect: according to the steam-water separator, the flow dividing holes in the steam-water separator are designed, so that a Venturi jet effect is formed when two-phase media of steam and condensate enter the flow dividing holes, the steam is blocked at the medium inlet side of the steam-water separator to continuously exchange heat, the steam loss is avoided, and the heat energy of the steam is fully utilized; and the steam-water separator is applied to the steam heat exchanger group, and the No. 1 steam-water separator is connected with the No. 2 heat exchanger, so that the condensate discharged by the No. 1 steam-water separator continuously exchanges heat in the No. 2 heat exchanger, further the full utilization of steam heat is realized, the steam consumption is reduced, the purposes of energy conservation and emission reduction are achieved, and the economic benefit is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
FIG. 1 is a system diagram of a conventional steam heat exchanger unit
FIG. 2 is a sectional view of the steam separator;
FIG. 3 is an overall structural view of the steam-water separator;
FIG. 4 is a side view of the steam trap inlet orientation;
FIG. 5 is a system diagram of a steam heat exchanger unit according to the present invention;
wherein, 1 is a separation tube; 2 is a contraction section; 3 is an expansion end; 4 is a shunting hole; 5 is a flange structure; 6 is a mounting hole; 7 is a No. 1 heat exchanger; 8 is a regulating valve; 9 is a No. 2 heat exchanger; 10 is a liquid storage tank; 11 is a No. 1 steam-water separator, 12 is a No. 2 steam-water separator, 13 is a main pipeline, and 14 is a branch pipeline.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model aims at providing a catch water and steam heat exchanger group to solve the problem that prior art exists, make steam heat make full use of, solved the big problem of steam heat exchanger group heat transfer back comdenstion water surplus heat.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
Example one
As shown in fig. 2 to 4, the embodiment provides a steam-water separator, where a diversion hole 4 is provided in the steam-water separator for separating steam from high-temperature condensate, and a design process of a bore diameter of the diversion hole 4 is as follows:
the fluid pressure at the inlet end of the diversion hole 4 is P1, and the temperature is T1; the fluid pressure at the outlet end of the flow dividing hole 4 is P2, and the temperature is T2; the flow rates of two ends of the shunting hole 4 are G, the aperture of the shunting hole 4 is d, and the hole length is l;
(1) the density p is calculated and,
according to a steam thermodynamic property calculation method established by the International formulation Commission, the density rho of the fluid in the diversion hole 4 is calculated by utilizing the temperature and pressure at two ends of the diversion hole 4;
(2) the pressure difference deltap between the inlet end and the outlet end of the flow dividing hole 4 is calculated,
Δ P ═ P1-P2 (formula 1)
(3) The intermediate parameters are calculated and the intermediate parameters,
calculating a comprehensive coefficient C according to the Bernoulli equation, wherein the comprehensive coefficient C represents the relation between pressure drop and mass flow:
ΔP＝CG2(formula 2)
Calculating the friction coefficient lambda according to the Darcy formula:
in the formula, Re is Reynolds number and surface roughness;
(4) the aperture d of the shunting hole 4 is calculated according to a formula,
namely:
the obtained aperture of the shunt hole 4, the fluid pressure and flow at two ends of the shunt hole 4, the fluid density and the hole length of the shunt hole 4 meet the requirements of the united type 2-5:
steam is respectively at catch water's both ends, the double-phase medium import of lime set and lime set medium export, catch water includes separator tube 1, separator tube 1 is inside including integrative forming and/or the shrink section 2 and the enlarged end 3 of connecting, the connected mode includes welding and bonding, enlarged end 3 sets up at shrink section 2 both ends, a resistance for reducing the fluid and getting into the diffluence hole, the minimum internal diameter of enlarged end 3 is the same with shrink section 2, be provided with diffluence hole 4 in the shrink section 2, diffluence hole 4 is used for blockking the steam that gets into catch water.
Because there is the pressure differential at catch water both ends, so under the pressure effect of medium inlet side, form the venturi injection effect when the double-phase medium of steam and condensate gets into reposition of redundant personnel hole 4, make the flow state of double-phase medium change the vortex state into, steam is by the separation at catch water separator's medium inlet side, and the condensate has avoided steam loss through the discharge of condensate medium export by reposition of redundant personnel hole 4.
Furthermore, the enlarged end 3 can be a stepped structure and a conical structure with gradually changing diameters, and when the enlarged end 3 is in the conical structure, a spiral diversion trench is arranged on the inner side surface and is used for reducing the resistance of fluid entering the diversion hole; mounting and connecting structures are arranged at two ends of the separation pipe 1, each mounting and connecting structure comprises a threaded structure and a flange structure 5, and when the flange structures 5 are arranged at the two ends of the separation pipe 1, mounting holes 6 are uniformly distributed on the circumferential edge of each flange structure 5; the splitter orifice 4 is arranged coaxially with the separator tube 1.
Example two
As shown in fig. 5, the present embodiment provides a steam heat exchanger group, and on the basis of the first embodiment, the steam heat exchanger group of the present embodiment has the following features: the steam heat exchanger group comprises a system steam main pipeline 13 and two branch pipelines 14 connected with the system steam main pipeline, and the two branch pipelines 14 are respectively connected with the No. 1 heat exchanger 7 and the No. 2 heat exchanger 9; the No. 1 heat exchanger 7 is connected with the No. 1 steam-water separator 11, and a high-temperature condensate outlet of the No. 1 steam-water separator 11 is connected with the No. 2 heat exchanger 9; the No. 2 heat exchanger 9 is connected with the No. 2 steam-water separator 12, and a high-temperature condensate outlet of the No. 2 steam-water separator 12 is connected with the liquid storage tank 10.
The condensate pressure discharged by the steam-water separator No. 1 11 is greater than the working pressure of the heat exchanger No. 2 9, so that high-temperature condensate formed after heat exchange of high-temperature steam in the heat exchanger No. 17 can enter the heat exchanger No. 2 under the action of pressure to continuously exchange heat, and the heat of the condensate is fully utilized; the system steam main pipeline 13 is provided with a regulating valve 8, the branch pipeline 14 is provided with a regulating valve 8, the regulating valve 8 is used for controlling the fluid flow of the steam main pipeline 13 and the branch pipeline 14, the liquid storage tank 10 is provided with a condensate outlet, and the condensate outlet is used for discharging condensate collected in the liquid storage tank 10.
When the steam heat exchanger group works, system steam enters a main pipeline 13 through a regulating valve 8, then two paths of flow division are carried out through a branch pipeline 14, one path of steam enters a No. 1 heat exchanger 7 for heat exchange, the steam after heat exchange is condensed into condensate due to heat reduction, then the condensate and the steam which is not fully utilized enter a two-phase medium inlet of a No. 1 steam-water separator 11, the flowing state of the two-phase medium of the steam and the condensate in a flow division hole 4 is changed into a vortex state, the steam is blocked at the medium inlet side of the No. 1 steam-water separator 11, the steam is fully utilized in the No. 1 heat exchanger 7 and the No. 1 steam-water separator 11, and the condensate is discharged through a condensate medium outlet of the No. 1 steam-water separator 11; the other branch pipeline 14 of the steam heat exchanger group is communicated with system steam and enters a No. 2 heat exchanger 9 for heat exchange, meanwhile, as the pressure of condensate discharged by a No. 1 steam-water separator 11 is greater than the working pressure of a No. 2 steam-water separator 12, high-temperature condensate discharged by the No. 1 steam-water separator 11 can enter the No. 2 heat exchanger 9 for further heat exchange, so that the amount of system steam directly consumed by the No. 2 heat exchanger 9 is reduced, the purposes of energy saving and consumption reduction are achieved, the economic benefit is improved, condensate after heat exchange by the No. 2 heat exchanger 9 and steam which is not fully utilized enter the No. 2 steam-water separator 12, the steam is blocked at the medium inlet side of the No. 2 steam-water separator 12, the steam is fully utilized in the No. 2 heat exchanger 9 and the No. 2 steam-water separator 12, and the condensate is discharged through a condensate medium outlet of the steam-water separator, and enters the liquid storage tank 10 for collection.
Example three:
the working pressure of a No. 1 heat exchanger 7 of a methylamine workshop of a certain chemical plant is 1.0MPa under the absolute pressure condition, the operating temperature is 180 ℃, the steam consumption is 10.8t/h, and the temperature of a heated medium is controlled to be 174 ℃; the working pressure of the No. 2 heat exchanger 9 is 0.5MPa, the operating temperature is 152 ℃, the steam consumption is 37t/h, and the temperature of the heated medium is controlled to be 110 ℃; the working pressure of the liquid storage tank 10 is 0.15 MPa.
Calculating the key size parameters of the steam-water separator according to the parameters as follows:
(1) the density p is calculated and,
according to the calculation method of thermodynamic properties of water vapor prepared by the International formulary Commission, the saturation temperature of 1.0MPa is 180 ℃, and the density of saturated condensate is 887.1kg/m3The viscosity was 150.2. mu. Pa · s.
(2) Calculating the pressure difference delta P between the inlet end and the outlet end of the shunting hole,
ΔP＝1.0-0.5＝0.5MPa＝500000Pa
(3) the intermediate parameter C is calculated and,
calculating a comprehensive coefficient C according to the Bernoulli equation, wherein the comprehensive coefficient C represents the relation between pressure drop and mass flow:
ΔP＝CG2
(4) given a hole length of 0.02m and an initial value of λ of 0.014, the shunt hole diameter d was calculated according to the formula,
(5) the lambda is checked and verified, and the operation,
flow rate in the hole:
reynolds number:
the surface roughness was 0.0002m, and the coefficient of friction λ was calculated according to darcy's formula:
therefore, λ ═ 1/8.466)20.014, consistent with the initial value. If not, the method is carried into the aperture calculation formula to recalculate d.
In conclusion, the steam-water separator obtained had a pore diameter of 0.0054m, i.e. 5.4mm, and a pore length of 0.02m, i.e. 2 cm. Calculating another steam-water separator by the same method, assembling a steam heat exchanger group, and performing installation and debugging as follows:
the processing amount of the No. 1 heat exchanger 7 is unchanged, and the steam consumption is reduced to 10.1 t/h; the processing amount of the No. 2 heat exchanger 9 is unchanged, and the steam consumption is reduced to 34.5 t/h. The total steam is saved by 3.2t/h, and 26880 tons of steam are saved annually according to 8400-hour operation; the cost of each ton of steam is 116 yuan, and the annual economic benefit can reach 311.8 ten thousand yuan.
It should be noted that, as is obvious to a person skilled in the art, the invention is not limited to details of the above-described exemplary embodiments, but can be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (8)
1. The steam-water separator is characterized by comprising a separation pipe, wherein the separation pipe comprises a contraction section and expansion ends connected with the two ends of the contraction section respectively, the minimum inner diameter of each expansion end is equal to the inner diameter of the contraction section, and a diversion hole is formed in the contraction section.
2. A steam-water separator according to claim 1, characterized in that: the expansion end is of a conical structure, and a spiral diversion trench is formed in the conical surface of the expansion end.
3. A steam-water separator according to claim 2, characterized in that: the separation tube is characterized in that flange structures are arranged at two ends of the separation tube, and mounting holes are uniformly distributed in the edges of the peripheries of the flange structures.
4. A steam-water separator according to claim 1, characterized in that: the shunting hole and the contraction section are coaxially arranged.
5. A steam heat exchanger group applying the steam-water separator as defined in any one of claims 1 to 4, characterized in that: the system comprises two steam-water separators, a system steam main pipeline and two branch pipelines connected with the system steam main pipeline, wherein the two branch pipelines are respectively connected with a No. 1 heat exchanger and a No. 2 heat exchanger; the two steam-water separators are respectively a No. 1 steam-water separator and a No. 2 steam-water separator, the No. 1 heat exchanger is connected with the No. 1 steam-water separator, and a high-temperature condensate outlet of the No. 1 steam-water separator is connected with the No. 2 heat exchanger; no. 2 heat exchanger with No. 2 catch water links to each other, 2 catch water's high temperature condensate outlet links to each other with the liquid storage pot.
6. The steam heat exchanger bank of claim 5, wherein: the condensed liquid pressure discharged by the No. 1 steam-water separator is greater than the working pressure of the No. 2 heat exchanger.
7. The steam heat exchanger bank of claim 5, wherein: and regulating valves are arranged on the system steam main pipeline and the branch pipelines.
8. The steam heat exchanger bank as recited in claim 7, wherein: the liquid storage tank is provided with a condensate outlet.
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| CN111336830A (en) * | 2020-03-30 | 2020-06-26 | 曹雁青 | Design method of flow dividing hole, steam-water separator and steam heat exchanger set |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111336830A (en) * | 2020-03-30 | 2020-06-26 | 曹雁青 | Design method of flow dividing hole, steam-water separator and steam heat exchanger set |
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