CN208108154U - Tubular type smoke re-heater - Google Patents

Abstract

The utility model discloses a kind of tubular type smoke re-heaters, several light pipes are arranged in parallel in the tubular type smoke re-heater vertically in the shell of cuboid, upper steam is connected at the top of light pipe to be in charge of, bottom is connected to lower steam and is in charge of, upper steam is in charge of the upper main steam range of connection, and lower steam is in charge of the lower main steam range of connection.Rectangular array is horizontally disposed with several light pipes to the utility model vertically inside the shell, structure is simple, steam enters from upper end entrance, tube body is flowed through vertically downward, thermal resistance very little by the phase-change heat transfer mode of steam condensate in pipe, since the heat exchange between cold fluid and hot fluid carries out outside pipe, in pipe, smoke flow resistance outside pipe is also small, and heat transfer efficiency is high.It is mutually indepedent between spaced light pipe, even if single or several heat pipes damage, flue gas flue gas will not be caused to reveal, do not influence overall heat exchange effect.Rod-shaped light-pipe structure is not easy salt crust ash and blocks, and when cleaning does not have bend part fouling to be easier to remove, and safeguards more convenient.

Description

Tubular type smoke re-heater

Technical field

The utility model relates to heat exchange equipment technology, especially a kind of tubular type smoke re-heater.

Background technique

Moisture content is about 16~30% in smoke evacuation after general dangerous waste incineration, when flue gas emission, same day gas relative humidity What containing water vapor amount can be discharged close to saturation state, clammy air and throat when height, relative temperature are low, in atmosphere contains big When measuring the gas contact of steam, ambient atmosphere can not absorb the gas of discharge, and gas can be down to dew point and form vapor white cigarette. " white cigarette " phenomenon not only causes visual pollution, but also purifying smoke still has micro sour gas, after condensing into acid drop Chimney can be corroded.Sometimes, when handling a large amount of flue gases under the bad meteorological condition of diffusion conditions, since flue-gas temperature is low, make cigarette The lifting of gas, which acts on, to be reduced, and " white cigarette " fails to spread at a distance and sufficiently just landed to be formed " chimney rain " before dilution, is polluted The ground on neighbouring periphery.So should be reheated to discharge flue gas, the temperature of purifying smoke is improved, " white cigarette " phenomenon is avoided It generates.

Smoke re-heater can heat the exhaust gas temperature of wet process of FGD, typically at least be heated to 130 DEG C or more, ability It prevents the flue gas near chimney breast from not generating condensation, and then prevents the generation of " white cigarette ".In order to improve heat exchange efficiency, city at present Finned smoke re-heater as shown in Figure 1 is generallyd use on field, and several row's fins 1 are set in the shell 2 of smoke re-heater, Fin 1 is arranged horizontally, and is spiraled from top to bottom, and the interval between the fin of this smoke re-heater spiral is small, and salt ash is easily Blocking needs frequent blowing out to clear up, and bend part cleaning is inconvenient after blocking；The elbow junction solder joint of spiral is more, leakage Point is just more, is easy to happen and leaks out；The small polishing that cannot derust of fin clearance cannot do anti-corrosion, and actual use corrosivity is larger, uses Service life is short.

Utility model content

The applicant for the fin structure of smoke re-heater in above-mentioned existing production be easy to happen blocking, breakthrough it is more, It easily leaks out, the disadvantages of etching problem is serious, a kind of structurally reasonable tubular type smoke re-heater is provided, pipeline pad is few, It is not easy to leak out, is not easy salt crust ash, blockage problem can be effectively prevented, improve the service life of smoke re-heater.

Technical solution used by the utility model is as follows：

A kind of tubular type smoke re-heater, the tubular type smoke re-heater are arranged in parallel vertically in the shell of cuboid Several light pipes, light pipe top are connected to upper steam and are in charge of, and bottom is connected to lower steam and is in charge of, and upper steam, which is in charge of, is connected to upper main steam range, Lower steam is in charge of the lower main steam range of connection.

As a further improvement of the above technical scheme：

Gap between adjacent light pipe is greater than 30mm.

Steam inlet is set in the side end of upper main steam range, liquid outlet is arranged in the side end of lower main steam range.

The light pipe is rectangular array arrangement.

Each horizontally-arranged several light pipes are in charge of to be in charge of with a lower steam with a upper steam to be connected to.

All upper steam are in charge of connection one upper main steam range.

All lower steam are in charge of a piece lower main steam range of connection.

The light pipe is radiation arrangement or staggered.

The beneficial effects of the utility model are as follows：

The utility model rectangular array in the shell of cuboid is horizontally disposed with several light pipes vertically, and structure is simple, steams Vapour enters from upper end entrance, flows through tube body vertically downward, by the phase-change heat transfer mode of steam condensate in pipe, due to cold and hot Heat exchange between fluid carries out outside pipe, therefore the thermal resistance very little in pipe, and the smoke flow resistance outside pipe is also small, heat transfer efficiency It is high.It is not vacuumized in light pipe, internal velocity of medium is low, and heat exchange contact is more abundant, is conducive to the sedimentation of medium.It is spaced It is mutually indepedent between light pipe, even if single or several heat pipes damage, flue gas flue gas will not be caused to reveal, do not influence overall heat exchange Effect.

The utility model conducts heat without using the fin of spiral, and rod-shaped light-pipe structure is not easy salt crust ash and blocks, There is no bend part fouling to be easier to remove when cleaning, safeguards more convenient.Rod-shaped light-pipe structure is also easy to do anti-corrosion, wear-resisting Damage, long service life.Rod-shaped light pipe does not have elbow, and therefore pad is few, and main pad is only in charge of in light pipe and steam, is steamed The position of vapour general pipeline connection, more relative to fin pipe bend connection welding, a possibility that leaking out, is low, work it is safer, Stablize.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of existing smoke re-heater.

Fig. 2 is the enlarged drawing in the portion A in Fig. 1.

Fig. 3 is the top view of Fig. 1.

Fig. 4 is the structural schematic diagram of the utility model.

Fig. 5 is the left view of Fig. 4.

Fig. 6 is the top view of Fig. 4.

In figure：1, fin；2, shell；3, upper main steam range；4, lower main steam range；5, steam inlet；6, main steam range goes out Mouthful；7, light pipe；8, upper steam is in charge of；9, lower steam is in charge of.

Specific embodiment

With reference to the accompanying drawing, illustrate specific embodiment of the present utility model.

As shown in Fig. 4, Fig. 5, Fig. 6, going out for incinerator smoke is arranged in tubular type smoke re-heater described in the utility model At mouthful, several light pipes 7 are arranged in parallel in rectangular array vertically in the shell 2 of cuboid, and the gap between adjacent light pipe 7 exists 30mm or more, vertical light pipe 7 are not easy salt crust ash and block, and more easy cleaning, be also easy to do anti-corrosion, long service life.Such as Fig. 6 It is shown, upper steam is set in the top horizontal of each horizontally-arranged several light pipes 7 and is in charge of 8, bottom level is arranged lower steam and is in charge of 9, often One it is horizontally-arranged on the equal upper steam at the top and bottom of it of every light pipe 7 be in charge of 8, lower steam and be in charge of 9 connections.Respectively in upper steam point The side end that pipe 8, lower steam are in charge of 9 is vertically arranged upper main steam range 3 in communication, lower main steam range 4, total in upper steam Steam inlet 5 is arranged in the side end of pipe 3, and liquid outlet 6 is arranged in the side end of lower main steam range 4.

When utility model works, steam enters from the steam inlet 5 of upper main steam range 3, is in charge of 8 into upper steam, with Entering corresponding vertical light pipe 7 afterwards, high-temperature steam releases heat to neat stress, and is condensed into liquid, after flue gas heat exchange, condensation Liquid afterwards is in charge of 9 into lower steam and is collected to lower main steam range 4, finally from the liquid outlet 6 of lower 4 side end of main steam range It is discharged through drain valve, completes a heat transfer process.Steam enters from upper end entrance in the utility model, flows through pipe vertically downward Body, by the phase-change heat transfer mode of steam condensate in pipe, the heat exchange between cold fluid and hot fluid carries out outside pipe, therefore in pipe Thermal resistance very little, it is small to manage outer smoke flow resistance, and the biggish coefficient of overall heat transmission, heat transfer efficiency height can be obtained with the lesser temperature difference.

Above description is the explanation to the utility model, is not the restriction to utility model, without prejudice to the utility model In the case where spirit, the utility model can make any type of modification.For example, the light pipe 7 of the utility model can not also be pressed Arrange according to rectangular array mode, can also radiate arrangement or it is staggered, as long as guarantee light pipe 7 between have enough gaps, Salt ash will not assemble blocking pipeline.

Claims (8)

1. a kind of tubular type smoke re-heater, it is characterised in that：Shell of the tubular type smoke re-heater in cuboid（2）It is interior Several light pipes are arranged in parallel vertically（7）, light pipe（7）Top is connected to upper steam and is in charge of（8）, bottom is connected to lower steam and is in charge of（9）, on Steam is in charge of（8）Main steam range in connection（3）, lower steam is in charge of（9）It is connected to lower main steam range（4）.

2. tubular type smoke re-heater described in accordance with the claim 1, it is characterised in that：Adjacent light pipe（7）Between gap be greater than 30mm。

3. tubular type smoke re-heater described in accordance with the claim 1, it is characterised in that：In upper main steam range（3）Side end Steam inlet is set（5）, lower main steam range（4）Side end be arranged liquid outlet（6）.

4. tubular type smoke re-heater described in accordance with the claim 1, it is characterised in that：The light pipe（7）For rectangular array arrangement.

5. tubular type smoke re-heater according to claim 4, it is characterised in that：Each horizontally-arranged several light pipes（7）With one Steam is in charge of on root（8）It is in charge of with a lower steam（9）Connection.

6. tubular type smoke re-heater according to claim 5, it is characterised in that：All upper steam are in charge of（8）Connection one Upper main steam range（3）.

7. tubular type smoke re-heater according to claim 5, it is characterised in that：All lower steam are in charge of（9）Connection one Lower main steam range（4）.

8. tubular type smoke re-heater described in accordance with the claim 1, it is characterised in that：The light pipe（7）For radiation arrangement or hand over Mistake arrangement.