CN2092076U

CN2092076U - Jet-type direct steam heat exchanger

Info

Publication number: CN2092076U
Application number: CN 90223644
Authority: CN
Inventors: 王钊
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-11-17
Filing date: 1990-11-17
Publication date: 1992-01-01

Abstract

The utility model relates to a jet-type direct steam heat exchanger, comprising an enclosed outer shell, a jet tube, an injection nozzle, a steam distributing net, a steady flow taper, etc. The jet-type direct steam heat exchanger combines injection with ejection to form a new heat exchange mode. By the sucking action of a taper injection nozzle, the jet-type direct steam heat exchanger enables to form negative pressure in a steam room. Thus, the requirement of steam pressure is decreased. Meanwhile, the steam is increased spraying speed by the taper injection nozzle to obtain the combining effect of the injection and the ejection. For increasing the utilization rate of the heat energy of the steam and stabilizing the flowing speed of water flow in the jet tube, the jet-type direct steam heat exchanger is also respectively provided with an arc-shaped steam distributing net and the steady flow taper. The utility model has the advantages of high heat efficiency, loose requirement for the steam pressure, and obvious energy-saving.

Description

Jet-type direct steam heat exchanger

The utility model relates to a kind of vapour---water direct heat-exchange device, particularly a kind of jet-introduced vapour---water direct heat-exchange device.It is to adopt jet tube and injection type vapour---on the basis of water direct heat-exchange device operation principle, and a kind of novel vapour---the water-to-water heat exchanger of designing.

The jet tube vapour of production of units such as present radiator factory, Changsha---water is handed over hot device (consult and build " Heat Supply Engineering " 85.12 that worker publishing house publishes, second edition), and its heat exchange mode is that steam sprays into the water by the many spray orifices on the tube wall from the jet pipe outside.Because the density of water is bigger, therefore adopt this heat exchange mode relatively stricter to the requirement of steam pressure.General steam working pressure (SWP) must be higher than more than the circulating pressure 0.05MPa of water, is lower than the scope of utilizing that this limit heat exchanger cisco unity malfunction has limited steam thermal energy.If the heat exchanger check valve seal is not tight, can cause water attack, also can lead to a disaster when serious.

In addition, it generally is flat-faced tube that the steam of vapour in the past---water direct heat-exchange device is all arranged net, and is covered with equally distributed cloth steam vent above, often is installed in the place, steam inlet of outer cover of heat exchanger outside.Because the general cold water inlet near heat exchanger in the position of steam inlet, therefore on current were flowed through the entire path of heat exchanger, current were not really even with contacting of steam, influenced the utilization rate of steam.

The purpose of this utility model just is to design a kind of vapour---water direct heat-exchange device that combines with injection that sprays, and to widen the scope of utilizing of steam thermal energy, improves the utilization rate of steam in the heat exchanger.

To achieve these goals, the utility model is utilizing original vapour---on the shell of water direct heat-exchange device and the basis of conical nozzle, designed that taper driving nozzle, steam are all arranged net and parts such as current stabilization cone.Its operation principle is as follows:

In the outer shell cavity of sealing, penetrate conical jet pipe, many traditional spray orifices that on jet pipe wall, distributing, plug-in mounting taper driving nozzle in spray orifice.When current enter nozzle throat, produce at a high speed, and in jet pipe and around the driving nozzle, form low pressure, nozzle vapor opening F ₂Produce sucking action, nozzle admission opening F ₁The place forms negative pressure, attracts steam to enter jet pipe and carries out mixed heat transfer.Because nozzle admission opening F ₁Sectional area greater than vapor opening F ₂Sectional area, under the effect of steam pressure, can cause vapor opening F ₂Big pressure, thereby produce the high velocity jet effect, also help to accelerate the flow velocity of water.The effect that both synthetic generation injections and injection combine, thus the requirement of heat exchanger reduced to steam pressure.

The utility model also is equipped with conical current stabilization cone at the delivery port center of conical nozzle, can be in the jet pipe thereby make because of the too fast decay of jet pipe hole enlargement with the flow velocity of driving nozzle ambient water, current are formed with the turbulent flow that is beneficial to heat exchange near the current stabilization cone base, processes such as passing through diffusion again, slow down and boost is recovered pressure at last and is given off heat exchanger.

In addition, the utility model has selected a kind of special steam all to arrange net, and it is to be drilled with qi-emitting hole of uneven density on steel plate, and the steel plate embowment is made.The regularity of distribution of qi-emitting hole is big more from the distribution density of steam supply mouth cloth steam vent far away more.The bottom that steam is all arranged net is installed on the sealing outer casing inner wall and the position between the jet pipe outer wall of steam supply pipe below, and two side is crossed on the inwall that is fixed on the sealing shell.Use this steam all to arrange net, facilitated current and steam in whole length of conical nozzle, to carry out even mixed heat transfer effectively.

Description of drawings:

Fig. 1. be jet-introduced vapour---the profile front view of water direct heat-exchange device

Fig. 2. be the profilograph of Fig. 1

Fig. 3. be the cutaway view of Fig. 2 along I-I line

Fig. 4. the cutaway view of ordering for Fig. 2 A

Fig. 5. be the scheme of installation of Fig. 2 along II-II cutaway view current stabilization cone

Wherein the parts label declaration is as follows:

1. shell, 2. injection sprays spray, 3. jet pipe,

4. steam is all arranged net, 5. current stabilization cone, 6. discharge opening

7. qi-emitting hole, 8. vapour inlet flange, 9. cold water inlet flange,

10. hot water outlet flange,

Below in conjunction with the description of drawings specific embodiment:

As shown in Figure 2, outer cover of heat exchanger 1 is formed by seamless steel pipe weldering system, and shell 1 constitutes enclosed cavity, is welded one by A between cold water inlet flange 9 and hot water outlet flange 10 ₃The conical nozzle 3 that steel is made.Be drilled with many spray orifices on the tube wall of jet pipe 3, taper driving nozzle 2 is housed on the spray orifice.Nozzle 2 usefulness 45 ^#The steel or stainless steel die forging is made, and welding or expanded joint are fixed on the jet pipe wall.As shown in Figure 4, the admission opening F of driving nozzle 2 ₁Sectional area greater than vapor opening F ₂Sectional area, the ratio 3:1 of the two is good.The vapor opening F of all driving nozzles 2 ₂The sectional area summation add 10% by the steam supply pipe sectional area and calculate vapor opening F ₂Diameter can select for use in week at φ 2mm-φ 8mm model according to heat exchanger load, the two can determine the quantity of driving nozzle in view of the above.If the vapor opening F of driving nozzle 2 ₂And the angle between the jet pipe wall is defined as jet angle, and then jet angle is good with 30 °-39 °.

As Fig. 2, shown in Figure 3, steam is all arranged net and 4 is made by steel plate boring, and the steel plate embowment promptly has arc section.All arrange net 4 bottom of steam is welded fixingly on the position between the outer wall of sealing shell 1 inwall below the steam supply pipe and jet pipe 3, and the inwall welding of two side and shell 1 is fixed.The hole that steam is all arranged net on 4 is called cloth steam vent 7, and cloth steam vent 7 is to arrange of uneven densityly, and its arrangement regulation is big more from steam supply mouth distribution density far away more, and the quantity of cloth steam vent 7 is decided by the steam consumption at driving nozzle 2 positions.

As shown in Figure 5, current stabilization cone 5 is used A ₃The steel machine adds to be made, and has the cone profile.Cone base in conical current stabilization cone is welded with several lacing wires, is good with the 3-4 root, so that with current stabilization cone 5 location, lacing wire can be weldingly fixed on the shell 1 or the delivery port place of jet pipe 3.The conical surface of current stabilization cone 5 and jet pipe 3 inner wall surface keeping parallelisms.

Discharge opening 6 is used to get rid of the ponding in the heat exchanger sealing shell 1.

What be worth statement is that the application of the utility model design principle never only limits to the foregoing description.Based on principle of the present utility model, still can enumerate the embodiment of multiple variant.Such as: the shape of change driving nozzle 2 and mounting means or the like needn't describe in detail one by one at this.Obviously, suchlike variant with apparent property all can be considered within the narration model week that is included in the utility model specification.

Jet-introduced vapour described in the utility model---water direct heat-exchange device, not tight because of the heat exchange efficiency height to steam pressure and water quality requirement, can make full use of the waste heat of various ways, have tangible energy-saving significance.And the utility model volume is little, make simple, easy for installation, cost is low, stable, also have good economic benefits.

Claims

1, a kind of have sealing shell, the band conical nozzle of spray orifice and a jet-introduced vapour-water direct heat-exchange device that steam is all arranged net, and it is characterized in that:

A. plug-in mounting taper driving nozzle in the spray orifice on jet pipe wall, and welding or expanded joint are fixed;

B. at jet pipe delivery port center conical current stabilization cone is set;

C. the steam bottom of all arranging net is welded fixingly on sealing outer casing inner wall below the steam supply pipe and the position between the jet pipe outer wall, and two side is fixing with the welding of sealing outer casing inner wall.

2, the jet-introduced vapour described in claim 1---water direct heat-exchange device, the admission opening sectional area that it is characterized in that described taper driving nozzle is greater than the vapor opening sectional area, and both are preferably 3:1 at ratio; Injection angle between taper driving nozzle and the jet pipe wall is between 30 °-39 °; The diameter of vapor opening is selected for use between 2mm-8mm according to thermic load; The making material selection stainless steel or the carbon steel of taper driving nozzle.

3, the jet-introduced vapour described in claim 1---water direct heat-exchange device, the cone base that it is characterized in that described conical current stabilization cone has the lacing wire of 3-4 root, so that with current stabilization cone welding location, the inwall keeping parallelism of the conical surface of current stabilization cone and conical nozzle.

4, the jet-introduced vapour described in claim 1---water direct heat-exchange device, it is characterized in that described steam all arranges net, be to be drilled with qi-emitting hole of uneven density to make on steel plate, big more from the distribution density of steam supply mouth qi-emitting hole far away more, the steel plate embowment has arc-shaped cross-section.