CN202521213U

CN202521213U - Energy-saving two-phase flow steam trap

Info

Publication number: CN202521213U
Application number: CN201120384293XU
Authority: CN
Inventors: 曹辉; 王龙江; 张嘉; 吴小天; 罗明才
Original assignee: LANHAI INDUSTRIAL Co Ltd LUOYANG CITY
Current assignee: LANHAI INDUSTRIAL Co Ltd LUOYANG CITY
Priority date: 2011-10-11
Filing date: 2011-10-11
Publication date: 2012-11-07
Anticipated expiration: 2021-10-11

Abstract

The utility model discloses an energy-saving two-phase flow steam trap which comprises a reducer tee (1), a water inflow reducing pipe (2), a throat tube (3), a water outflow increasing pipe (4) and a phase change signal pipe (5). The water inflow reducing pipe, the throat tube and the water outflow increasing pipe are arranged in the reducer tee with the same axis. A hollow cavity is arranged between the throat tube and the inner wall of the reducer tee, and the hollow cavity is communicated with the phase change signal pipe which is in the perpendicular direction of the reducer tee. A plurality of steam trapping ways (6) are arranged inside the throat tube, and a group of combined rectangular phase change signal holes (7) which are communicated with each steam trapping way is arranged on a position of each steam trapping way and the position is corresponding to the outer diameter of the throat tube, therefore, a plurality of groups of phase change signal holes are arranged on the periphery of the outer diameter of the throat tube. On the premise that an operating principle of the two-phase flow steam trap maintains invariable and on the condition that steam trapping amount maintains the same, steam consumption is reduced to an uttermost degree, adaptability to the change in a turboset load is strong, equipment operation noise and operation cost can be effectively reduced, and equipment operation safety and stability can be improved, and therefore the accurate control of the steam trap to a water level can be achieved.

Description

Energy-saving two phase flow STEAM TRAP

Technical field

The utility model belongs to the STEAM TRAP technical field, and what relate generally to is a kind of stream-liquid two-phase flow STEAM TRAP.

Background technique

Last century the nineties; First generation two phase flow STEAM TRAP (being the two phase flow fluid level control device again) appears; Adaptable across all kinds of heat exchangers of enterprises such as electric power, chemical industry, oil, metallurgy, the water level control of development unit; To reach equipment safety operation and energy saving purposes, be the Updated product of traditional drainage controller.

Its utilization " stream-liquid two-phase flow " principle; Automatically regulate water level continuously; The mechanical moving element and the electric controling element of traditional water level controller have been abandoned; Nos any moving element itself has overcome the permanent fault of traditional water level controller well, makes the difficult problem of water level control obtain solution preferably.Because of novel, principle is advanced, and is simple and practical and receive users' favorable comment.Its basic principle is: hydrophobic by valve body inlet entering valve pocket, phase transition tube (signal tube) is just gathered vapour phase, liquid phase signal direct admission valve chamber according to water level, with the specially designed orifice plate of flowing through after hydrophobic the mixing.When water level rose, the vapour phase signal reduced, thereby hydrophobic flow increases; When drawdown, the vapour phase signal increases, and reduces the effective flow area of orifice plate, and hydrophobic flow reduces, and reaches the hydrophobic purpose of effective obstruction.

But it also exists a lot of problems, knows from the working principle of stream-liquid two-phase flow self regulating water level controller, and it is how much to carry out the hydrophobic flow joint that withers through the vapour amount that flows into regulator.That is to say that regulate vapour and mix at the regulator valve in-core with hydrophobic inevitably, so, the drain temperature behind this STEAM TRAP of flowing through is higher than the drain temperature before the STEAM TRAP certainly, hydrophobic more easily at hydrophobic pipeline system generation vaporization steam flashing.If it is big or lean on hydrophobic Subcoold temperature before the system device when not enough to regulate the vapour amount, mixed hydrophobic itself possibly be exactly steam water two phase flow, not only pipeline and equipment are had cavitation and influence of vibration, and do not reach complete hydrophobic purpose.

When the hydrophobic joint valve that withers of heater adopts the stream-liquid two-phase flow self regulating water level controller; When the unit sliding pressure operation; Reduction gradually along with load; Hydrophobic water level in the heater will be more and more lower, explain that this water-level regulator receives extraneous factors such as unit operation mode, load height to influence bigger.

Because it does not avoid vapour-liquid two completely that should avoid in the drain water piping mutually as far as possible, 3 ‰ steam quality also is admitted facts, increase by its cavitation, vibration and consumption of steam that causes pipeline, and also be a problem of present stage two phase flow STEAM TRAP existence.

Summary of the invention

The purpose of the utility model promptly produces thus, under the constant prerequisite of two phase flow steam trap connection (two phase flow fluid level control device) working principle, proposes a kind of energy-saving two phase flow STEAM TRAP.Under the identical situation of hydrophobic amount, reduce consumption of steam as far as possible, stronger to the adaptability of steam turbine set load variations, effectively reduce equipment operation noise and operating cost, improve its safety in operation and stability.

The technological scheme that the utility model implementation above-mentioned purpose is taked is: a kind of energy-saving two phase flow STEAM TRAP comprises reducing tee, water inlet reducing pipe, trunnion, water outlet increaser, phase change signal pipe; Water inlet reducing pipe, trunnion, water outlet increaser concentric are arranged in the reducing tee; Has cavity between trunnion and reducing tee inwall; This cavity is communicated with the phase change signal pipe of reducing tee Vertical direction, is provided with a plurality of hydrophobic runners in the said trunnion, is provided with one group of combined type rectangular phase change signal hole that is communicated with it at the trunnion external diameter corresponding position of each hydrophobic runner; Thus, be provided with many group phase change signals hole at trunnion external diameter circumference.

Many groups phase change signal hole that the described trunnion excircle of the utility model is provided with is a rectangular opening, and one of them phase change signal hole is that right angle setting, two other phase change signal holes are the angle of inclination and are provided with, and the angle of inclination increases gradually, angle of inclination >=45 °.

The circulation gross area of the said trunnion of the utility model is 80～100% of a said phase change signal pipe circulation area, and the gross area in said every group of phase change signal hole is 60～100% of the single Flow area of trunnion.

The utility model is owing to change the hydrophobic runner on the trunnion into the porous runner by former single hole runner; Because the diameter of each runner of porous runner diminishes than former single hole Flow diameter; Therefore; The vapour signal of equal flow and kinetic energy increases the inhibition of hydrophobic circulation, will reduce the required steam flow of water level control, promptly reduces the use of consumption of steam.And the phase change signal hole that is arranged on the trunnion excircle changes a plurality of rectangular openings by combination of angles into by the circular hole of original peripheral vertical distribution; Solved vapour signal problem of uneven distribution in a plurality of runners; More help making the vapour signal in the phase change signal hole to hinder hydrophobic circulation, to realize that STEAM TRAP is to Water Level Control.

Description of drawings

Fig. 1 is the assembly structure schematic representation of the utility model.

Fig. 2 is to be the structural representation of the utility model trunnion.

Fig. 3 is Fig. 2 B-B view.

Fig. 4 is Fig. 2 C-C view.

Fig. 5 is Fig. 2 partial enlarged drawing.

Among the figure: 1, reducing tee, 2, the water inlet reducing pipe, 3, trunnion, 4, the water outlet increaser, 5, the phase change signal pipe, 6, hydrophobic runner, 7, the phase change signal hole.

Embodiment

In conjunction with accompanying drawing, the embodiment who provides the utility model is following:

As shown in Figure 1: the described a kind of energy-saving two phase flow STEAM TRAP of the utility model comprises reducing tee 1, water inlet reducing pipe 2, trunnion 3, water outlet increaser 4, phase change signal pipe 5, and the reducing pipe 2 of wherein intaking, trunnion 3, water outlet increaser 4 are through interference fit or be welded to connect and be one.Three's concentric is installed in the reducing tee 1 substantially horizontal internal diameter.The pipeline of Vertical direction is a phase change signal pipe 5 on the reducing tee 1, and three ports of reducing tee 1 are connected with extraneous through flange or welding manner.

Shown in Fig. 2-5: coaxially in the trunnion be provided with a plurality of hydrophobic runners 6; Trunnion external diameter corresponding position at each hydrophobic runner 6 is provided with one group of a plurality of combined type rectangular phase change signals hole 7 that is communicated with it; One of them phase change signal hole 7 is provided with for right angle setting, two other phase change signal holes 7 are the angle of inclination; And the angle of inclination increases gradually, angle of inclination >=45 °.Like this, be provided with many group rectangle phase change signals hole 7 at trunnion external diameter circumference corresponding to hydrophobic runner 6.From the vapour of reducing tee 1 phase change signal pipe 5, water signal after rectangle phase change signal hole 7 gets into a plurality of hydrophobic runner 6 and hydrophobic mixing the trunnions 3, from 4 outflows of water outlet increaser.

Because the effect of hydrophobic kinetic energy; The rectangle square hole of Vertical direction makes steam get in the trunnion 3 than the rectangle square hole that has angle more easily; And the little rectangle square hole rectangle square hole bigger than angle of angle gets in the trunnion 3 more easily, therefore under the certain situation of vapour signal pressure, along trunnion external diameter peripheral direction; Steam can at first get into the rectangle square hole of each Vertical direction successively; Along with the rising of vapour signal pressure, get into successively again in the little rectangle square hole of angle again, get into successively again in the big rectangle square hole of angle at last.The structure of pressing a plurality of phase change signals hole of several angle combination is pressed the principle of fluid dynamic energy size distribution, has solved vapour signal problem of uneven distribution in a plurality of coaxial runners.

The design principle of each circulation passage area of the utility model is: the circulation gross area of trunnion 3 is about 80～100% of phase change signal pipe 5 circulation areas, can all occupy the circulation area of trunnion 3 to guarantee the vapour signal; The gross area in every group of phase change signal hole 7 is about 60～100% of trunnion 3 single Flow areas, can all occupy the circulation area of trunnion 3 single runners to guarantee the vapour signal.

During STEAM TRAP work; The hydrophobic a plurality of hydrophobic runner 6 that gets in the trunnion 3 by water inlet reducing pipe 2; Phase change signal pipe 5 is just gathered vapour phase, liquid phase signal according to water level and is directly got into the space that is made up of trunnion 3 and reducing tee horizontal cavity; Through a plurality of phase change signals hole 7 of pressing the several angle combination on the trunnion 3,, flow out through water outlet increaser 4 with the hydrophobic runner in the trunnion 3 of flowing through after hydrophobic the mixing.

The hydrophobic water yield increases in heater (heat exchanger); When water level rose, the vapour phase signal in the phase change signal pipe 5 reduced (steam flow minimizing), thereby the vapour amount that flows through in the trunnion 3 reduces; Increased effective flow area of water in the trunnion 3; The circulation water yield increases, thereby hydrophobic flow increases hydrophobic drawdown.

The hydrophobic water yield reduces in heater (heat exchanger); During drawdown, the vapour phase signal in the phase change signal pipe 5 increases (steam flow increase), thereby the vapour amount that flows through in the trunnion 3 increases; Reduced effective flow area of water in the trunnion 3; The circulation water yield reduces, thereby hydrophobic flow reduces hydrophobic water level rising.

More than two processes constantly circulate, realized that thus STEAM TRAP is to Water Level Control.

Claims

1. energy-saving two phase flow STEAM TRAP; Comprise reducing tee (1), water inlet reducing pipe (2), trunnion (3), water outlet increaser (4), phase change signal pipe (5); Water inlet reducing pipe, trunnion, water outlet increaser concentric are arranged in the reducing tee; Has cavity between trunnion and reducing tee inwall; This cavity is communicated with the phase change signal pipe of reducing tee Vertical direction, it is characterized in that: be provided with a plurality of hydrophobic runners (6) in the said trunnion (3), be provided with one group of combined type rectangular phase change signal hole (7) that is communicated with it at the trunnion external diameter corresponding position of each hydrophobic runner (6); Thus, be provided with many groups phase change signal hole (7) at trunnion external diameter circumference.

2. energy-saving two phase flow STEAM TRAP according to claim 1; It is characterized in that: many groups phase change signal hole (7) that said trunnion (3) excircle is provided with is rectangular opening; One of them phase change signal hole (7) is that right angle setting, other two phase change signal holes (7) are the angle of inclination setting; And the angle of inclination increases gradually, angle of inclination >=45 °.

3. energy-saving two phase flow STEAM TRAP according to claim 1; It is characterized in that: the circulation gross area of said trunnion (3) is 80～100% of said phase change signal pipe (a 5) circulation area, and the gross area in said every group of phase change signal hole (7) is 60～100% of the single Flow area of trunnion (3).