CN201126322Y

CN201126322Y - Glassed steel hot pipe flue gas heat-exchanging device

Info

Publication number: CN201126322Y
Application number: CNU2007201958795U
Authority: CN
Inventors: 顾太章; 张富信; 赵建波; 周景伟
Original assignee: Beijing Research Institute Of Metallurgical Equipment China Metallurgical Const
Current assignee: Beijing Metallurgical Equipment Research Design Institute Co Ltd
Priority date: 2007-10-31
Filing date: 2007-10-31
Publication date: 2008-10-01
Anticipated expiration: 2017-10-31

Abstract

A glass lining heat pipe fume heat exchanger rig in fume wet-process desulfurization system of steam power plant, mainly comprises a heat pipe box, a heat exchanger top cover, an upper baffle plate, a lower baffle plate, a middle baffle plate, a hot fume inlet, a hot fume outlet, a cool fume inlet, a cool fume outlet, an anchor bolt nut. A plurality of heat pipe mounting holes distributed according to the distribution pattern of the vacuum glass lining heat pipe are provided respectively on the upper baffle plate, the lower baffle plate and the middle baffle plate, and each heat pipe is inserted into the mounting hole and vertically mounted in the mounting hole. The vacuum glass lining heat pipe is divided into the evaporation segment and the condensation segment and the glass lining layer is provided on the outer surface of the heat pipe. The amount of the heat pipe is determined by the required exchange heat. The glass lining heat pipe fume heat exchanger rig solves the problem that the gas reheater is blocked and etched and prevents the secondary pollution to ensure the desulfurization effect.

Description

A kind of enamel heat pipe smoke heat replacing device

Technical field:

The utility model relates to a kind of heat pipe smoke heat replacing device that is used for the thermal power plant wet desulfurization system.

Background technology:

At present, what the smoke heat replacing device in the wet desulfurization system of thermal power plant adopted mostly is the swinging smoke re-heater, and this device mainly is made up of shell, corrugated plate dst heat exchange element, gyroscope wheel etc.In this heat exchanger, cylindrical heat exchanger is divided into left and right sides two parts, the heat exchange element of corrugated plate dst rotates with certain angular speed around central shaft, hot flue gas on a left side the half side heat exchanger that passes from top to bottom realize accumulation of heat, cold flue gas is passed heat release and the heats cold flue gas that heat exchanger is realized thermal element from the bottom up from the right side, there is following shortcoming in this device in using: 1. the heat exchange element owing to the swinging smoke re-heater is the exhaust gases passes that becomes corrugated to form by pressing metal plates, reaching very big heat exchange area requires the slit between plate and the plate very little, but the ash that very little slit is easy to be contained in the flue gas stops up, reduce the heat transfer effect of element, the pressure drop of increase system can influence the operate as normal of system when serious; 2. flue gas can be heated to 70～80 ℃ owing to rotary type heat exchanger, but still be lower than 90～110 ℃ of dew-point temperatures, the SO in the flue gas ₃Form sulfuric acid vapor with the steam in the flue gas, the heat exchanging element has very strong corrosiveness, though the equipment that has adopts the enamel preservative treatment on the heat exchange element surface, but because the ripple type plank frame shape of heat exchange element, make thickness have only the edge of the heat exchange element about 1mm to be difficult to be covered fully, therefore, still can not solve the etching problem of its existence; 3. the heat exchange principle of swinging smoke re-heater is constantly to rotate in hot junction and cold junction by heat exchange element, absorb heat to the cold junction release heat in the hot junction, going round and beginning again reaches the purpose of heat exchange, because absorption and release are to finish on same heat exchange element, will inevitably produce secondary pollution.Promptly when the flue gas of handling without desulfurization passes through heat exchange element, have the SO of some ₂Be attached to the surface of heat exchange element Deng material, when heat exchange element ran to the cold junction release heat, the cleaning flue gases after desulfurization has been handled can be with the SO that adheres on the heat exchange element ₂Together bring smoke stack emission into Deng material, will influence desulfuration efficiency greatly.Secondly, the existence of smoke blowing gas leakage and the flue gas in the heat exchange element gap all can take to without the former flue gas that desulfurization is handled in the clean flue gas after the desulfurization processing and go, thus the reduction desulfuration efficiency.

Summary of the invention:

The purpose of this utility model provides a kind of heat pipe smoke heat replacing device that overcomes shortcomings such as the stifled ash that exists in the prior art, burn into secondary pollution, smoke blowing, gas leakage, bad desulfurization effects.

Technical solution of the present utility model is to realize like this, a kind of smoke heat replacing device that is used for the thermal power plant wet desulfurization system is provided, it is mainly by the heat pipe case, the heat exchanger loam cake, upper spacer, lower clapboard, central dividing plate, hot gas approach, hot exhanst gas outlet, the cold flue gas import, the cold flue gas outlet, anchor bolt nut is formed, it is characterized in that upper spacer, central dividing plate, lower clapboard is processed with the some heat pipe installing holes that distribute by vacuum enamel heat pipe arrangement respectively, every vacuum enamel heat pipe inserts in the installing hole, and vertical be installed in the heat pipe case on, in, in the installing hole of lower clapboard, vacuum enamel heat pipe is divided into evaporator section and condensation segment two parts by central dividing plate, hot flue gas is full of evaporator section, cold flue gas is full of in the condensation segment, vacuum enamel heat pipe is by steel pipe, the steel shutoff, the set bolt fixed installation forms, liquid by steel shutoff shutoff in evacuated enamel heat pipe, the outer surface of this vacuum enamel heat pipe has glass-lined coating, this vacuum enamel heat pipe has some, and its quantity is decided according to required heat exchange amount.Its feature also is in the middle part, outside of every vacuum enamel heat pipe the isolation baffle ring to be installed; Glass-lined coating at the outer surface of vacuum enamel heat pipe is to be the glass porcelain glaze of primary raw material with silica; The liquid that is filled with in vacuum enamel heat pipe the inside is distilled water.

The utility model implementation result is: owing to adopted hot pipe technique, solved the blockage problem of smoke re-heater, and avoided the secondary pollution that produces because of gas leakage, owing to fired glass-lined coating on the heat pipe surface, solved etching problem, made heat pipe corrosion-resistant, the life-span is long; Because every heat pipe all is fully independently hermetically sealed vacuum tube, when taking place, problem can replace separately, and avoided influence, thereby guaranteed desulfurized effect whole system.

Description of drawings:

Fig. 1 is the front view of a kind of enamel heat pipe of the utility model embodiment smoke heat replacing device

Fig. 2 is the A-A view of Fig. 1

Fig. 3 is the cutaway view of vacuum enamel heat pipe among the utility model embodiment

In the accompanying drawing: 1. steel shutoff; 2. distilled water; 3. steel pipe; 4. vapours; 5. isolate the shelves ring; 6. glass-lined coating; 7. liquid; 8. set bolt; 9. lower clapboard; 10. hot flue gas; 11. hot exhanst gas outlet; 12. central dividing plate; 13. heat pipe case; 14. cold flue gas import; 15. vacuum enamel heat pipe; 16. anchor bolt nut; 17. cold flue gas; 18. heat exchanger loam cake; 19. upper spacer; 20. cold flue gas outlet; 21. hot gas approach;

The specific embodiment:

Below in conjunction with accompanying drawing the utility model embodiment is done to describe in further detail, Fig. 1 is the front view of a kind of enamel heat pipe of the utility model embodiment smoke heat replacing device; In Fig. 1, heat pipe case 13 is by heat exchanger loam cake 18, upper spacer 19, lower clapboard 9, central dividing plate 12, hot gas approach 21, hot exhanst gas outlet 11, cold flue gas import 14, cold flue gas outlet 20, anchor bolt nut 16 is formed, upper spacer 19, central dividing plate 12, lower clapboard 9 is processed with some heat pipe installing holes that distribute by vacuum enamel heat pipe 15 arrangement modes respectively, every vacuum enamel heat pipe 15 inserts in the installing hole, and vertical be installed in the heat pipe case 13 on, in,

lower clapboard

19,12, in 9 the installing hole, vacuum enamel heat pipe 15 is divided into evaporator section and condensation segment two parts by central dividing plate 12, hot flue gas 10 is filled in evaporator section, and cold flue gas 17 is full of in the condensation segment.Fig. 2 is the A-A view of heat pipe case 13, and this vacuum enamel heat pipe 15 has some, is fixed in the dividing plate, and its quantity is decided according to required heat exchange amount.Fig. 3 is the cutaway view of vacuum enamel heat pipe among the utility model embodiment, vacuum enamel heat pipe 15 is welded by steel pipe 3, steel shutoff 1, isolation shelves ring 5 and set bolt 8, outer wall enamel firing one deck glass porcelain glaze 6 at steel pipe 3, distilled water 2 by steel shutoff 1 shutoff in evacuated enamel heat pipe 15, the outer surface enamel firing of vacuum enamel heat pipe 15 have 0.2mm thick be the glass porcelain glaze layer of primary raw material with silica; Be filled with the distilled water 2 of some in vacuum enamel heat pipe 15 the insides.

Operation principle: hot flue gas 10 enters heat pipe case 13 lower part box by the hot gas approach 21 on the heat pipe case 13, after being heated, distilled water 2 in the vacuum enamel heat pipe 15 is vaporizated into upwards transferring heat energy of vapours 4, entered the wet desulfuration tower desulfurization by the flue gas 10 after the heat exchange cooling by exhanst gas outlet 11, after entering heat pipe case 13 upper box bodies by cold flue gas import 14, the cold flue gas through the wet desulfuration tower desulfurization enters chimney by cold flue gas outlet 20 after the thermal energy exchange of coming up heats up by transmitting with vacuum enamel heat pipe 15, the vapours 4 of the rising in the vacuum enamel heat pipe 15 is condensed into liquid 7 flows back to vacuum enamel heat pipe 15 along tube wall bottom after carrying out thermal energy exchange with cold flue gas, distilled water 2 carries out heat exchange to liquid circulation by liquid state to gaseous state again in the vacuum enamel heat pipe 15 under the continuous effect of thermal medium and cold medium.

Claims

1. enamel heat pipe smoke heat replacing device that is used for thermal power plant smoke-gas wet desulfurization system, it is mainly by heat pipe case (13), heat exchanger loam cake (18), upper spacer (19), lower clapboard (9), central dividing plate (12), hot gas approach (21), hot exhanst gas outlet (11), cold flue gas import (14), cold flue gas outlet (20), anchor bolt nut (16) is formed, it is characterized in that upper spacer (19), central dividing plate (12), lower clapboard (9) is processed with the some heat pipe installing holes that distribute by vacuum enamel heat pipe (15) arrangement mode respectively, every vacuum enamel heat pipe (15) inserts in the installing hole, and vertical be installed in the heat pipe case (13) on, in, lower clapboard (19,12,9) in the installing hole, vacuum enamel heat pipe (15) is divided into evaporator section and condensation segment two parts by central dividing plate (12), hot flue gas (10) is full of in the evaporator section, cold flue gas (17) is full of in the condensation segment, vacuum enamel heat pipe (15) is by steel pipe (3), steel shutoff (1), set bolt (8) fixed installation forms, liquid by steel shutoff (1) shutoff in evacuated enamel heat pipe (15), the outer surface of this vacuum enamel heat pipe (15) has glass-lined coating (6), this vacuum enamel heat pipe (15) has some, and its quantity is decided according to required heat exchange amount.

2. a kind of enamel heat pipe smoke heat replacing device as claimed in claim 1, its feature also are to be equipped with in the middle part, outside of every vacuum enamel heat pipe (15) isolates baffle ring (5).

3. a kind of enamel heat pipe smoke heat replacing device as claimed in claim 1, its feature are that also the glass-lined coating (6) at the outer surface of vacuum enamel heat pipe (15) is to be the glass porcelain glaze of primary raw material with silica.

4. a kind of enamel heat pipe smoke heat replacing device as claimed in claim 1, its feature are that also the liquid that is filled with in vacuum enamel heat pipe (15) the inside is distilled water.