CN2475988Y - Steam-water-water heat exchanger - Google Patents

Abstract

The utility model relates to a steam-water heat exchanger which is specially used in a central air-conditioning heating system, comprising a heat exchanger shell, the inside of the shell is provided with multiple heat exchanger pipes, the back end of the shell is closing, the front pipe mouth is sealed with a four flow partition plate, the pipe mouth of each heat exchanger pipe is crossly connected to the four flow partition plate, and the front end of the four flow partition plate is sealed and connected with a seal head with a four flow partition cavity, the external surrounding wall of the back end of the heat exchanger shell or the sealing end wall of the back end is provided with a water inlet, the upper external wall of the front end of the shell is provided with a water outlet, the position of the upper external wall of the seal head corresponding to the upper half partition cavity thereof is provided with a steam inlet, the position of the lower external wall of the seal head corresponding to the lower half partition cavity thereof is provided with a steam outlet, the utility model transfers the steam inside the heat exchanger pipe, transfers medium water outside the heat exchanger pipe.

Description

Vapour-water-water heat exchanger

The utility model relates to a kind of steam water heat exchanger that the central air-conditioning heating system is used that is exclusively used in.

As everyone knows, steam water heat exchanger is the Winter heat supply capital equipment in central air conditioner system, independently is present in the central air conditioner system, but combines with the summer cooling system again, forms central air-conditioning cold and heat supply system.There is their uniqueness in the cold and heat supply system, bears the task of oneself separately.Cold and heat supply will reach target (ensureing about 25 ℃ of user indoor temperatures) homogeny separately, and the central air-conditioning end-equipment is again the shared property of cold and heat supply.According to the characteristics and the characteristic of central air-conditioning cold and heat supply, organic unified their operational factor of tissue reaches rationally, safety, energy-conservation reduction operating cost, is convenient to the purpose of management.This will be to cooling and warming, and the operational factor in the cold and heat supply is unified, and imports and exports the temperature difference as chilled water, and heat medium water is imported and exported the unification (5 ℃) of the temperature difference.To reach the unification of chilled water and heat medium water flow velocity.And the cooling condition chilled water temperature difference of refrigeration machine is 7-12 ℃, determines chilled water flow in system according to this duty parameter.Refrigeration is just in service to pass to matchmaker's water to the cold that is produced, and delivers to the user at the chilled water of following cooling of the promotion of water pump and uses, and the high temperature matchmaker water after the user uses is got back to refrigeration machine and lowered the temperature under the promotion of water pump.So continuous circulation forms refrigeration, cooling.With cold central air-conditioning cold supply system.Basic identical for heat medium water intensification, cooling circulation theory and cooling, difference is that the heat direction of transfer is different.Heat medium water turnover temperature difference of heat exchanger, each producer is defined in 10-30 ℃, is equipped with the heat medium water flow with so big temperature difference, and the heat medium water flow descends at double so, and that is exactly the flow heat-supplying mode that has a narrow range of temperature greatly.This heat-supplying mode looks like the saving operating cost, reduces boiling water pump platform number, does not have objection but save operating cost theoretically, but consider to analyze from other factors, by facts have proved for many years, this flow heat-supplying mode that has a narrow range of temperature greatly is worthless, and reason has 3 points.A. analyze from heat medium water, contain in the certain impurity, particularly matchmaker's water calcium, magnesium ion in matchmaker's water under the situation of variations in temperature, separate being agglomerated into dirt with water, big more calcium ions and magnesium ions of the temperature difference and moisture are fast more from, coalescent speed, quicken fouling.Overcome calcium ions and magnesium ions and be agglomerated into the necessary little temperature difference of dirt.B. the heat medium water flow reduces, and must cause the heat medium water flow velocity to reduce, and heat medium water moves flow velocity in pipeline reduces, and the coalescent bonding tube wall of calcium ions and magnesium ions opportunity increases.C. pump head is selected to determine according to matchmaker's water system resistance to water-flow size, and the resistance to water-flow size is to determine with length according to the caliber size of flow, flow velocity, pipe arrangement.Be equipped with under the caliber situation at constant flow flow velocity, the heat medium water flow reduces, flow velocity just reduces, pump head must descend, and resistance to water-flow simultaneously also reduces, and what problem operation does not have in horizontal pipeline, but high-rise and be in the different journey water system, overcome the geometric height resistance to water-flow with regard to difficulty, cause some user's heating equipments not have the heat medium water circulation, influence the user and use.Draw by above argumentation, in central air conditioner system, passing in and out cold and hot matchmaker's water temperature difference (no matter 5 degree or 10 degree temperature difference) will unify, and flow velocity also will be unified, and could ensure the reasonable safe operation of central air conditioner system.In the central air conditioner system heat supply, change refrigeration system operational factor because equipment is many, changes as the refrigerator operation operating mode, and end equipment does not conduct heat and changes, and factors such as engineering design parameter change have certain difficulty.

The purpose of this utility model is exactly to provide a kind of transformation heat exchanger work operating mode in order to address the above problem, and the cooling of easily realizing freezing in the central air conditioner system, heats the vapour-water-water heat exchanger of heat supply running improve parameter unification.

Technical solution of the present utility model:

A kind of vapour-water-water heat exchanger, it includes heat exchanger shell, be provided with many heat exchanger tubes in the housing, the housing back-end closure, its front end mouth of pipe place sealing is provided with four flow process demarcation strips, the equal cross-under of the mouth of pipe of each heat exchanger tube is on four flow process demarcation strips, and the front end of four flow process demarcation strips is tightly connected with the end socket that has four flow process compartments, it is characterized in that being provided with water inlet at exchanging air housing rear end periphery wall or back-end closure end wall, be provided with delivery port at housing upper front end outer wall, position at corresponding its top half separate space of end socket external wall of upper portion is provided with steam inlet, is provided with steam (vapor) outlet in the position of the corresponding its underpart of end socket bottom outer wall half separate space.

Steam water heat exchanger is a capital equipment in the central air conditioner system, the steam water heat exchanger model, and heat exchange mode is varied, as steam water heat exchanger, water-water heat exchanger, storage heat exchanger, complex flow high-efficiency cyclone steam water heat exchanger, floating coiled pipe steam water heat exchanger or the like.Above heat exchanger respectively has the characteristics of oneself and the uniqueness of working environment.The utility model is developed their strong point, overcomes their weakness, reaches refrigeration, cooling, heats, heating parameter is unified, and flow velocity is unified, ensures the operation of central air-conditioning safe and reasonable.The utility model is in conjunction with the characteristics of central air-conditioning, and with energy savings, the reduction operating cost is a purpose, and its vapour-water-water heat exchanger is than general steam water heat exchanger energy savings 17.4%.The utility model changes the heat exchange mode of steam water heat exchanger, by walking matchmaker's water in the Tube Sheet of Heat Exchanger, walks steam outside the pipe, changes into and walks steam in the pipe, walks matchmaker's water outside the pipe.Heat exchanger after the improvement, matchmaker's water is little by the heat exchanger resistance, and flow is big, heats up steadily, and heat utilization ratio reaches 96.3% in the steam, and steam condensate (SC) outlet temperature is low, only exceeds 0-2 ℃ than heating agent water outlet temperature.Heat exchanger after the improvement uses in heating system, can save about 1,200,000 yuan of operating costs every year.

Below in conjunction with accompanying drawing the utility model is further described.

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is the A-A enlarged section schematic diagram of Fig. 1.

Fig. 3 is the B-B enlarged section schematic diagram of Fig. 1.

As Fig. 1-3, the utility model includes heat exchanger shell 1, be provided with many heat exchanger tubes 2 in the housing 1, housing 1 back-end closure, its front end mouth of pipe place sealing is provided with four flow process demarcation strips 3, the equal cross-under of the mouth of pipe of each heat exchanger tube 2 is on four flow process demarcation strips 3, and the front end of four flow process demarcation strips 3 is tightly connected with the end socket 5 that has four flow process compartments 4, characteristics of the present utility model are, be provided with water inlet 6 at exchanging air housing 1 rear end periphery wall or back-end closure end wall, be provided with delivery port 7 at housing 1 upper front end outer wall, position at corresponding its top half separate space 4-1 of end socket 5 external wall of upper portion is provided with steam inlet 8, is provided with steam (vapor) outlet 9 in the position of the corresponding its underpart half separate space 4-2 of end socket 5 bottom outer walls.

In the utility model, water inlet 6 is preferably disposed on the rear end diapire of exchanging air housing 1, and delivery port 7 is preferably disposed on the front end roof of housing 1.Be provided with sewage draining exit 10 at housing 1 middle part diapire, on housing 1 middle part roof, be provided with the adapter 11 of setting pressure table, be provided with the adapter 12 that is used to install safety valve in the position of corresponding its four flow processs compartment, the 4 tops half separate space 4-1 of end socket 5 external wall of upper portion.

The course of work of the present utility model is recirculated water to be sent into housing 1 by pump pressure from water inlet 6, by carrying out sending from housing 1 delivery port 7 after the heat exchange with each heat exchanger tube 2.High-pressure and high-temperature steam is sent into the top half separate space 4-1 of four flow process compartments 4 end socket 5 from the steam inlet 8 of end socket 5, enter each corresponding heat exchanger tube 2 by the heat exchanger tube mouth of pipe that communicates with top half separate space 4-1 on the four flow process demarcation strips 3 then, make steam enter first pass, and make steam enter second flow process by these heat exchanger tubes 2, and be back to the semicircle separate space 4-3 top of four flow process compartments 4 of end socket 5, because the upper and lower of semicircle separate space 4-3 communicates, then steam again from the bottom of semicircle separate space 4-3 enter with four flow process demarcation strips 3 on each heat exchanger tube 2 of communicating with semicircle separate space 4-3 bottom, make steam enter the 3rd flow process, and make steam enter the 4th flow process by these heat exchanger tubes 2, and be back to the bottom half separate space 4-2 of end socket 5, discharge from steam (vapor) outlet 9 at last.Wherein first and second flow process of steam is to carry out the exchange of vapour-water, and water-water of heat medium water exchanges in its third and fourth flow process to be the high temperature that carries out steam coagulate water and the housing 1, so made full use of the heat energy in the steam, has improved rate of heat exchange greatly.

The heat exchange mode of vapour-water-water heat exchanger of the present utility model is to walk steam in the heat-transfer pipe, and heat-transfer pipe is walked matchmaker's water outward.Steam is operation one, two flow processs in pipe, are vapour-water heat exchange, and three, four flow processs are that steam condensate (SC) and matchmaker's water are proceeded heat exchange, are water-water heat exchange, and this heat exchange mode is vapour-water-water heat exchange.Heat medium water moves outside heat exchanger tube, is a flow process.Vapour-water-water heat exchanger characteristics, 1. the heat utilization ratio in the steam is up to 96%.The steam condensate (SC) temperature is low, exceeds 0-2 ℃ than heating agent water temperature.2. matchmaker's water is little by the heat exchanger resistance, is the resistance of general vapour-water heat exchanger tube 1/10.Heat exchange mode by steam water heat exchanger changes, and increases heat medium water by steam water heat exchanger current area (bigger about 15 times than general vapour one water-to-water heat exchanger current area).Heat medium water is short by the steam water heat exchanger flow process, thus heat medium water by steam water heat exchanger resistance little (0.005Mpa), general vapour one water-to-water heat exchanger heat medium water by resistance at (0.1Mpa).Therefore cold heat medium water pump head can drop to 44M by 55M, and every of pump motor drops to 75KW by 110Kw, and the heat medium water water pump operation take decline more than 30%.It is big to walk steam resistance in the pipe, and the pressure loss is just big, utilizes that pressure promotes the steam operation and conducts heat there is not what harm, and also have certain benefit as power in the steam, can accelerate heat transmission in the steam.

Claims (2)

1, a kind of vapour-water-water heat exchanger, it includes heat exchanger shell, be provided with many heat exchanger tubes in the housing, the housing back-end closure, its front end mouth of pipe place sealing is provided with four flow process demarcation strips, the equal cross-under of the mouth of pipe of each heat exchanger tube is on four flow process demarcation strips, and the front end of four flow process demarcation strips is tightly connected with the end socket that has four flow process compartments, it is characterized in that being provided with water inlet at exchanging air housing rear end periphery wall or back-end closure end wall, be provided with delivery port at housing upper front end outer wall, position at corresponding its top half separate space of end socket external wall of upper portion is provided with steam inlet, is provided with steam (vapor) outlet in the position of the corresponding its underpart of end socket bottom outer wall half separate space.

2, by the described vapour-water-water heat exchanger of claim 1, it is characterized in that described water inlet should be arranged on the rear end diapire of exchanging air housing, described delivery port should be arranged on the front end roof of housing.

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