CN108332182A

CN108332182A - Through-flow boiler

Info

Publication number: CN108332182A
Application number: CN201810245402.6A
Authority: CN
Inventors: 石裕高
Original assignee: Bright Thermal Equipment Co Ltd
Current assignee: Bright Thermal Equipment Co Ltd
Priority date: 2018-03-23
Filing date: 2018-03-23
Publication date: 2018-07-27
Anticipated expiration: 2038-03-23
Also published as: CN108332182B

Abstract

The invention discloses a kind of through-flow boilers, the inside and outside circle water pipe being respectively communicated with including upper and lower header and with upper and lower header, between inside and outside circle water pipe upper end tube nozzle, the upper end tube nozzle of annular isolation casing is less than lower end nozzle diameter for the lower end of annular isolation casing in upper collecting chamber.Since the thermic load of inner conduit is high, inner ring water pipe velocity of water circulation is big, after adding annular isolation casing, the carbonated drink of inner conduit is changed flow direction by the annular isolation casing constraint of closing in shape, simultaneously because the section of annular isolation casing is more than the area set of inner conduit, so being effectively relieved and having slackened the liquid fluctuating phenomenon in annular isolation sleeve area, be conducive to that hot vapour is guided to rise simultaneously, and it is located at the liquid level outside annular isolation sleeve area almost without being affected and keeping the static condition of liquid level, advantageous cold water to enter outer ring water pipe and constitute decline fluidised form.

Description

Through-flow boiler

Technical field

The present invention relates to through-flow boilers, more particularly, to the improvement of the steam separated structure of boiler.

Background technology

Water pipe is arranged between upper and lower header in through-flow boiler in the prior art, and water pipe is divided into inner ring water pipe and outer ring water Pipe there also is provided smoke pipe in water pipe, and the flue gas in burner hearth is discharged after inner ring smoke pipe, outer ring smoke pipe successively, thus leads to through-flow pot Stove heating surface thermic load is high, especially inner ring water pipe, and load accounts for about the 80~90% of total load, therefore inner ring water pipe water recycles Flow velocity is big.Since the upper end of inside and outside circle water pipe in the prior art is unobstructedly to be passed directly into upper condensate sump, carbonated drink is inevitable Water level is directly impacted, water entrained by steam phenomenon is serious, while water level fluctuating range is big and frequency is high, and water-level fluctuation is acute It is strong, seriously affect water level regulation control.

Invention content

The object of the present invention is to provide a kind of through-flow boilers, reduce water level fluctuation fluctuating range and frequency to improve water The control and regulation of position liquid level, improve the heat exchange efficiency of boiler.

To achieve the above object, present invention employs following technical schemes：A kind of through-flow boiler, including upper and lower header and The inside and outside circle water pipe being respectively communicated with upper and lower header, the lower end for being located at the annular isolation casing in upper collecting chamber are located inside and outside circle Between water pipe upper end tube nozzle, the upper end tube nozzle of annular isolation casing is less than lower end nozzle diameter.

Since the thermic load of inner conduit is high, inner ring water pipe velocity of water circulation is big, after adding annular isolation casing, inner conduit Carbonated drink is changed flow direction by the annular isolation casing constraint of closing in shape, simultaneously because the section of annular isolation casing is more than interior The area set of water pipe, so it is effectively relieved and has slackened the liquid fluctuating phenomenon in annular isolation sleeve area, and meanwhile it is advantageous Rise in guiding hot vapour, and is located at the liquid level outside annular isolation sleeve area almost without being affected and keeping liquid level Static condition, advantageous cold water enter outer ring water pipe and constitute decline fluidised form.

Description of the drawings

Fig. 1 is the structural schematic diagram of the present invention；

Fig. 2 is the A-A sectional views in Fig. 1.

Specific implementation mode

In conjunction with Fig. 1,2, through-flow boiler includes upper and lower header 10,20 and is respectively communicated with upper and lower header 10,20 inside and outside Water pipe 30,40 is enclosed, the lower end for being located at the annular isolation casing 50 in upper collecting chamber 10 is located inside and outside circle water pipe 30,40 upper end tube nozzles Between, the upper end tube nozzle of annular isolation casing 50 is less than lower end nozzle diameter.

Annular isolation casing 50 keeps apart the upper end tube nozzle of inside and outside circle water pipe 30,40, high interior of thermic load, flow velocity It encloses the moist steam that water pipe 30 is discharged to make to rise flowing under the constraint of annular isolation casing 50, not only inner ring water pipe 30,40 locations The frequency of the liquid fluctuating in domain, wave amplitude are cut down, moisture significantly reduce, reduce the difficulty of steam-water separation, in addition annular every Liquid level from 40 top of outer ring water pipe outside casing 50 is not almost influenced by steam discharge.The closing in of annular isolation casing 50 The setting of shape effectively constrains the flow path of hot gas, realizes and implements carbonated drink point for the first time to wet steam in annular isolation casing 50 From.

Preferably, the annular isolation casing 50 is lower big, upper small step pipe, the annular isolation set The lower end of the Large Diameter Pipeline of pipe 50 is connected with 10 lower plate of upper collecting chamber, the inner tube of the upper end pipe with small pipe diameter of the annular isolation casing 50 Diameter is more than the madial wall caliber of upper collecting chamber 10, and the upper end tube nozzle of annular isolation casing 50 is high greater than or equal to the liquid level of ordinary water level It spends, the tube sheet 51 at lower big, upper small reducing on the annular isolation casing 50 is arranged in the top of inner ring water pipe 30.It is above-mentioned In scheme, the region of 51 lower section of tube sheet is more than the Lumen Area set of all inner ring water pipes 30, so, in 30 upper end of inner ring water pipe Carbonated drink is sustained for the first time at steam discharge, reduces the frequency and amplitude of the liquid fluctuating in 50 region of annular isolation casing, hot vapour Water content is minimized, while under the constraint of tube sheet 51, and radially inward then lateral flow is flowing up carbonated drink, annular The upper end tube nozzle of disrance sleeve 50 is greater than or equal to the liquid level of ordinary water level, and setting in this way may insure annular isolation casing The waters in 50 outsides is barely affected, so the monitoring precision of water level is ensured.

Moisture, which leaves, needs to carry out that steam-water separation, concrete scheme are as follows again after annular isolation casing 50：In upper collecting chamber 10 It is additionally provided with steam manifold 60, steam manifold 60 is the top of annular and the upper end tube nozzle positioned at annular isolation casing 50, steam manifold 60 Bottom be greater than or equal to the liquid level of ordinary water level, the air inlet on the lateral wall of steam manifold 60 arranges steam-water separation list Member, the bottom connection collecting ring case 70 of steam-water separation unit, the bottom of collecting ring case 70 has drainpipe 71 to extend downward into water level Liquid level below, 60 top of steam manifold is connected to steam outlet pipe 80, and the bottom of steam manifold 60 has outlet pipe 61 to extend downward into water level Liquid level below, the outlet pipe 61, drainpipe 71 are located at the outside of annular isolation casing 50.

In said program, steam-water separation unit is arranged in the inlet of steam manifold 60, is gone back into the wet steam in steam manifold 60 Can isolate a small amount of water can wander to 60 bottom of steam manifold by outlet pipe 61 downwards be discharged, the water that steam-water separation unit is collected by Collecting ring case 70 is collected and is fallen through 71 row of drainpipe.Outlet pipe 61 is arranged in 60 bottom of steam manifold can be to avoid the collection in steam manifold 60 Physical mixed during water can be flowed by steam and by machinery carry.

Through-hole 52 outside communicating pipe intracavitary is arranged at the lower part of the pipe with small pipe diameter of annular isolation casing 50.Ensure annular isolation casing 50 The water level of medial and lateral is consistent.

Illustrate the specific composition of steam-water separation unit below, the air inlet on the lateral wall of the steam manifold 60 is in circumferential direction Uniform intervals are arranged in range, and steam-water separation unit is correspondingly arranged at each air inlet, and steam-water separation unit is corrugated plating component 90, the outside of the radial direction of corrugated plating component 90 is steam admission side, inside is connected with the air inlet on the lateral wall of steam manifold 60, Plate face in 90 projection in the horizontal direction of corrugated plating component is corrugated in radial direction.Above-mentioned steam-water separation unit can be with It is realized using other units with effect same or component.

Claims

1. a kind of through-flow boiler, including upper and lower header (10,20) and the inside and outside circle that is respectively communicated with upper and lower header (10,20) Water pipe (30,40), it is characterised in that：The lower end of annular isolation casing (50) in upper collecting chamber (10) is located inside and outside circle water Between managing (30,40) upper end tube nozzle, the upper end tube nozzle of annular isolation casing (50) is less than lower end nozzle diameter.

2. through-flow boiler according to claim 1, it is characterised in that：The annular isolation casing (50) be it is lower it is big, on The lower end of small step pipe, the Large Diameter Pipeline of the annular isolation casing (50) is connected with upper collecting chamber (10) lower plate, described The interior caliber of the upper end pipe with small pipe diameter of annular isolation casing (50) is more than the madial wall caliber of upper collecting chamber (10), annular isolation casing (50) upper end tube nozzle is greater than or equal to the liquid level of ordinary water level, on the annular isolation casing (50) it is lower it is big, on Tube sheet (51) at small reducing is arranged in the top of inner ring water pipe (30).

3. through-flow boiler according to claim 1 or 2, it is characterised in that：It is additionally provided with steam manifold in upper collecting chamber (10) (60), steam manifold (60) is the top of annular and the upper end tube nozzle positioned at annular isolation casing (50), the bottom of steam manifold (60) Greater than or equal to the liquid level of ordinary water level, the air inlet on the lateral wall of steam manifold (60) arranges steam-water separation unit, vapour The bottom connection collecting ring case (70) of water separative element, the bottom of collecting ring case (70) has drainpipe (71) to extend downward into water level Liquid level below, steam manifold (60) top is connected to steam outlet pipe (80), and there is outlet pipe (61) in the bottom of steam manifold (60) to downward Below the liquid level for extending to water level, the outlet pipe (61), drainpipe (71) are located at the outside of annular isolation casing (50).

4. through-flow boiler according to claim 1 or 2, it is characterised in that：Under the pipe with small pipe diameter of annular isolation casing (50) There is the through-hole (52) outside communicating pipe intracavitary in portion.

5. through-flow boiler according to claim 3, it is characterised in that：Air inlet on the lateral wall of the steam manifold (60) Mouth uniform intervals in circumferential range are arranged, and steam-water separation unit is correspondingly arranged at each air inlet, and steam-water separation unit is wave Card component (90), the outside of the radial direction of corrugated plating component (90) be steam admission side, inside and steam manifold (60) lateral wall On air inlet linking, the plate face in corrugated plating component (90) projection in the horizontal direction is corrugated in radial direction.