CN200940825Y

CN200940825Y - Wall temperature adjustable heat pipe coal saving device

Info

Publication number: CN200940825Y
Application number: CN 200620044883
Authority: CN
Inventors: 王汤权; 朱国庆; 何新土; 李传凯
Original assignee: 711th Research Institute of CSIC
Current assignee: 711th Research Institute of CSIC
Priority date: 2006-08-17
Filing date: 2006-08-17
Publication date: 2007-08-29
Anticipated expiration: 2016-08-17

Abstract

The utility model discloses a heat pipe economizer with an adjustable wall temperature which comprises a body, two separators located in the body, jacketed heat pipes wherein one end of first and last jacketed heat pipes respectively introduces from the body lateral to play end respectively for feed water input pipe and feed water output pipe. The ends of other jacketed heat pipes connect each other to form a serial snake shaped coil set. The utility model is characterized in that a bypass heat exchange loop is equipped between the end of feed water input pipe and the end of feed water output pipe. At the bypass heat exchange loop, first bypass connects the feed water output pipe with two ends of a bypass pipe crosses over two ends of first bypass valve. A pipe section located at the inner side of first bypass valve connects a secondary bypass valve. A part of bypass heat exchanger connects the feed water input pipe and other part of bypass heat exchanger connects the top pipe section of bypass pipe. The utility model possesses advantages of simple structure, convenient operation, good heat exchange effect and strong dew point erosion.

Description

Wall temperature adjustable type heat pipe economizer

Technical field

The utility model relates to a kind of wall temperature adjustable type heat pipe economizer.

Background technology

The basic mode of water and flue gas heat exchange mainly contains two kinds of following current and adverse currents, considers from the heat exchange effect, and be good with full adverse current, but the heat pipe at feed-water inlet place might produce low-temperature dew point corrosion with to export the outside wall surface temperature that hot flue gas contacts lower.The temperature of the outside wall surface that the heat pipe that the following current heat exchange can improve the feed-water inlet place contact with the hot flue gas of outlet, but can sacrifice the heat exchange effect, the increase heat exchange area.

The structure of existing following current heat pipe economizer generally as shown in Figure 1, it comprises casing 11, be located at two dividing plate 12, a plurality of sleeve type heat-pipes 13 that respectively have some perforation in the casing.Two dividing plates place respectively in the casing, and casing is separated into a mid portion 14 and two limit end parts 15,16.A plurality of sleeve type heat-pipes place the mid portion of casing, one end of its sleeve type heat-pipe in the top is drawn from the limit end parts of casing, form feed-water inlet pipe end 17, an end of its nethermost sleeve type heat-pipe is drawn from the limit end parts of casing, forms to water outlet pipe end 18; This topmost in the other end of the other end, a nethermost sleeve type heat-pipe of a sleeve type heat-pipe and remaining sleeve type heat-pipe port of pipe in the limit end parts of casing separately, link to each other in twos, form the serpentine coil bundle of polyphone.

Though this heat pipe economizer can play the effect that reclaims heat energy, because therefore its structural reason, when the feed-water inlet temperature is too low, adopts the heat exchange mode of all-cis stream still to keep away unavoidable low-temperature dew point corrosion.

Summary of the invention

The utility model is in order to overcome the above-mentioned shortcoming that prior art exists, and a kind of wall temperature adjustable type heat pipe economizer that provides.

The technical scheme that the utility model is taked is: a kind of wall temperature adjustable type heat pipe economizer, comprise casing, be located in the casing two respectively have the dividing plate of some perforation, a plurality of sleeve type heat-pipe; Described two dividing plates place respectively in the casing, and casing is separated into a mid portion and two limit end parts; Described a plurality of sleeve type heat-pipe places the mid portion of casing; In each sleeve type heat-pipe, an end of first and last sleeve type heat-pipe is drawn from the limit end parts of casing, forms the feed-water inlet pipe end and to the water outlet pipe end; The port of remaining sleeve type heat-pipe links to each other in the limit end parts of casing separately in twos, forms the serpentine coil bundle of polyphone;

It is characterized in that: also comprise a bypass heat exchange loop; Described bypass heat exchange loop is located at the feed-water inlet pipe end and between the water outlet pipe end; It comprises bypass pipe, bypass heat exchanger, first by-passing valve and second by-passing valve; Described first by-passing valve is connected on the pipeline section to water outlet pipe; The two ends of described bypass pipe are connected across the two ends of this first by-passing valve; Described second by-passing valve is connected on the pipeline section that is positioned at the inboard bypass pipe of first by-passing valve; A described bypass heat exchanger part is connected on the pipeline section of feed-water inlet pipe, and another part is connected on the top pipeline section of bypass pipe.

Above-mentioned a kind of wall temperature adjustable type heat pipe economizer wherein, also comprises a plurality of transit joints, and described each transit joint is arranged on the hole that is used for passing through sleeve type heat-pipe of dividing plate, and described sleeve type heat-pipe is fixed in the described transit joint.

Above-mentioned a kind of wall temperature adjustable type heat pipe economizer wherein, also comprises a plurality of expansion joints, and described each expansion joint is arranged on the connecting portion of dividing plate and casing.

Above-mentioned a kind of wall temperature adjustable type heat pipe economizer, wherein, described heat pipe is finned heat pipe.

Above-mentioned a kind of wall temperature adjustable type heat pipe economizer wherein, is filled with some heat-transfer working mediums in the chuck between the described heat pipe inner and outer pipe.

Because the utility model has adopted above technical scheme, the technique effect of its elaboration is tangible:

1, the bypass heat exchanger is set, can improves the feed-water inlet temperature.

2, the special transit joint of design on heat pipe package is in order to realize being tightly connected between heat pipe light wall pipe shell and the thick tube sheet of casing.

3, the special expansion joint of design between tube sheet and casing when offsetting the expansion of heat pipe tube bundle heat, keeps the seal isolation between the box house space.

Description of drawings

Concrete structure of the present utility model is further provided by following embodiment and accompanying drawing thereof.

Fig. 1 is the structural representation of prior art heat pipe economizer.

Fig. 2 is the structural representation of one of embodiment of the utility model wall temperature adjustable type heat pipe economizer.

Fig. 3 is the structure enlarged diagram of A part among Fig. 2.

The specific embodiment

See also Fig. 2.The basic structure of the utility model wall temperature adjustable type heat pipe economizer comprises that casing 21 and two respectively have the dividing plate 22 of some perforation and the sleeve type heat-pipe 23 of some outer wall installing fins.Two dividing plates 22 place in the casing 21, and casing is separated into a mid portion 23 and two limit end parts 24,25.Described some sleeve type heat-pipes 4 place mid portion 23, the interior pipe two-port of sleeve type heat-pipe passes from the perforation of two dividing plates respectively and enters two

limit end parts

24,25, and in the limit of side end parts 24 with first and last sleeve type heat-pipe in the port of pipe from casing 21, draw, form the feed-water inlet end 31 and the feedwater port of export 32.In these two sleeve type heat-pipes in the another port of pipe and all the other sleeve type heat-pipes the port of pipe in the limit end parts of casing separately, link to each other in twos, thereby form the serpentine coil bundle of contacting.Pipe water flowing in each sleeve type heat-pipe, finned heat pipe outer wall leads to flue gas, and the heat exchange of cigarette G﹠W is undertaken by being located at the heat pipe that is filled with some heat-transfer working mediums between the inner and outer pipe in the chuck.

When heat exchange mode too low when the feed-water inlet temperature, that adopt all-cis stream is still kept away unavoidable low temperature dew point, the utility model has adopted the side at the serpentine coil bundle to increase by a bypass heat exchange loop 5, and this bypass heat exchange loop 5 is located at the feed-water inlet pipe end and between the water outlet pipe end; It comprises bypass pipe 51, bypass heat exchanger 52, first by-passing valve 53 and second by-passing valve 54.Wherein: first by-passing valve 53 is connected on the pipeline section to water outlet pipe 32; The two ends of bypass pipe 51 are connected across the two ends of this first by-passing valve 53; On the pipeline section of the bypass pipe that is positioned at first by-passing valve, 53 inboards, connect one second by-passing valve 54; Bypass heat exchanger 52 parts are connected on the pipeline section of feed-water inlet pipe, and another part is connected on the top pipeline section of this bypass pipe 51.Make low temperature water inlet elder generation and high-temperature water outlet heat exchange in bypass heat exchanger 52 of feed-water inlet pipe, advance sleeve type heat-pipe again after the raising temperature, so just can avoid low-temperature dew point corrosion effectively.Regulate the aperture of first by-passing valve 53 and second by-passing valve 54, just can regulate the water yield, thereby regulate the temperature of the feedwater of heat pipe economizer by the high-temperature water of bypass heat exchanger 52.

See also Fig. 3.The utility model has adopted the mode of transit joint 7 for the seal welding between realization heat pipe light wall pipe shell and the thick tube sheet, the internal diameter that this transit joint 7 is coaxial disjunctors is identical and two annulus that external diameter is different, the light wall pipe wall welding of the annulus of little external diameter 71 and the outer tube of heat pipe, the annulus 72 of big external diameter and dividing plate welding.This structure can realize being tightly connected between heat pipe light wall pipe shell and the thick tube sheet of casing reliably.

Please cooperate referring to Fig. 2.The utility model is for solving the problem of expanding with heat and contract with cold of heat pipe, and the junction of heat pipe and dividing plate has increased expansion joint 8.When the heat pipe, heat pipe axially can extend because of thermal expansion at hot flue gas, and is when flue gas allows to leak, movable as long as dividing plate 22 makes; And when flue gas did not allow to leak, this piece active clapboard must strictly be kept apart casing mid portion and limit end parts.This expansion joint press casing 21 inwall size around, two ends respectively with the inwall and dividing plate 22 welding of casing 21, can there be multiple shape in the cross section of expansion joint 8, embodiment is as U type, V-type and W type etc.

The utility model is simple in structure, easy to use, good effect of heat exchange.Can regulate the into temperature of the feedwater of heat pipe economizer, solve when the feed-water inlet temperature is too low, adopted the problem of the low-temperature dew point corrosion that the heat exchange mode of all-cis stream may exist.

Claims

1, a kind of wall temperature adjustable type heat pipe economizer, comprise casing, be located in the casing two respectively have the dividing plate of some perforation, a plurality of sleeve type heat-pipe; Described two dividing plates place respectively in the casing, and casing is separated into a mid portion and two limit end parts; Described a plurality of sleeve type heat-pipe places the mid portion of casing; In each sleeve type heat-pipe, an end of first and last sleeve type heat-pipe is drawn from the limit end parts of casing, forms the feed-water inlet pipe end and to the water outlet pipe end; The port of remaining sleeve type heat-pipe links to each other in the limit end parts of casing separately in twos, forms the serpentine coil bundle of polyphone;

It is characterized in that:

Also comprise a bypass heat exchange loop;

Described bypass heat exchange loop is located at the feed-water inlet pipe end and between the water outlet pipe end; It comprises bypass pipe, bypass heat exchanger, first by-passing valve and second by-passing valve; Described first by-passing valve is connected on the pipeline section to water outlet pipe; The two ends of described bypass pipe are connected across the two ends of this first by-passing valve; Described second by-passing valve is connected on the pipeline section that is positioned at the inboard bypass pipe of first by-passing valve; A described bypass heat exchanger part is connected on the pipeline section of feed-water inlet pipe, and another part is connected on the top pipeline section of bypass pipe.

2, a kind of wall temperature adjustable type heat pipe economizer according to claim 1, it is characterized in that, also comprise a plurality of transit joints, described each transit joint is arranged on the hole that is used for passing through sleeve type heat-pipe of dividing plate, and described sleeve type heat-pipe is fixed in the described transit joint.

3, a kind of wall temperature adjustable type heat pipe economizer according to claim 1 is characterized in that also comprise a plurality of expansion joints, described each expansion joint is arranged on the connecting portion of dividing plate and casing.

4, a kind of wall temperature adjustable type heat pipe economizer according to claim 1 is characterized in that described heat pipe is finned heat pipe.

5, a kind of wall temperature adjustable type heat pipe economizer according to claim 1 is characterized in that, is filled with some heat-transfer working mediums in the chuck between the described heat pipe inner and outer pipe.