CN211977633U - Flue gas waste heat recovery indirect heating equipment - Google Patents
Flue gas waste heat recovery indirect heating equipment Download PDFInfo
- Publication number
- CN211977633U CN211977633U CN202020515795.0U CN202020515795U CN211977633U CN 211977633 U CN211977633 U CN 211977633U CN 202020515795 U CN202020515795 U CN 202020515795U CN 211977633 U CN211977633 U CN 211977633U
- Authority
- CN
- China
- Prior art keywords
- temperature section
- water
- flue gas
- heat exchange
- spraying
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Treating Waste Gases (AREA)
- Chimneys And Flues (AREA)
Abstract
The utility model belongs to energy-concerving and environment-protective field, concretely relates to flue gas waste heat recovery indirect heating equipment, wherein include the casing, the high temperature section spray thrower, the high temperature section sprays the inlet channel, the high temperature section sprays the return water pipe, the high temperature section trickle packs, high temperature section heat transfer coil pipe, high temperature section coil pipe water-locator, high temperature section internal circulation water inlet channel, high temperature section internal circulation water outlet pipe, the low temperature section spray thrower, the low temperature section sprays the inlet channel, water proof hood, the low temperature section sprays the return water pipe, flue gas inlet pipe, the exhanst gas outlet pipeline. The flue gas waste heat recovery and heat exchange equipment can realize sensible heat and latent heat recovery of low-temperature flue gas, and realizes high-quality recovery of a high-temperature section of the flue gas on the basis of realizing indirect contact heat exchange.
Description
Technical Field
The utility model relates to a waste heat recovery equipment, concretely relates to flue gas waste heat recovery indirect heating equipment belongs to energy-concerving and environment-protective technical field.
Background
In order to avoid the damage of acid corrosion to heat exchange equipment, the waste heat recovery before the flue gas desulfurization of the coal-fired boiler is not lower than the dew point temperature of acid gas (generally 90-120 ℃). Although the existing corrosion-resistant heat exchangers made of fluoroplastics and the like can reduce the temperature of flue gas to be lower than the dew point temperature of acid gas, the heat transfer temperature difference of a flue gas waste heat recovery system is very high due to low heat conductivity coefficient, and the temperature of hot water generated by waste heat recovery is very low. For an ammonia desulphurization system, because of the ammonium sulfate solution concentration process, the temperature of the flue gas entering the desulphurization tower is not lower than 120 ℃, and the limit condition is further increased for the recovery of the waste heat of the flue gas before desulphurization.
Therefore, if the deep recovery of the flue gas waste heat is realized, the deep recovery can only be considered after desulfurization. Although the sulfur content is greatly reduced and the corresponding acid corrosion is greatly reduced, the flue gas temperature after desulfurization is lower (generally 45-55 ℃), and if the shell and tube heat exchanger is adopted to indirectly contact and exchange heat to obtain the flue gas waste heat, the higher hot water temperature can not be obtained. If a direct contact (spraying) heat exchange mode is adopted, firstly, the water quality can not be ensured because the spraying hot water is mixed with impurities such as dust, a desulfurizer, soluble salt generated by desulfurization and the like due to the contact of flue gas, and secondly, the spraying water quantity is also very huge.
Aiming at flue gas of a 45-55 ℃ wet saturation boiler, how to obtain waste heat by the minimum heat exchange temperature difference on the premise of ensuring the quality of hot water is the key of the existing low-temperature flue gas waste heat recovery technology.
SUMMERY OF THE UTILITY MODEL
To the problem, the utility model provides a flue gas waste heat recovery indirect heating equipment.
In order to solve the technical problem, the utility model discloses a technical scheme does:
the utility model provides a flue gas waste heat recovery indirect heating equipment, including flue gas inlet pipeline, high temperature section heat transfer coil pipe, high temperature section trickle packs, the high temperature section spray thrower, water proof hood, the low temperature section sprays the heat transfer section, the low temperature section spray thrower, the exhanst gas outlet pipeline, the low temperature section sprays the inlet channel, the low temperature section sprays the return water pipeline, the high temperature section sprays the inlet channel, the casing, the high temperature section sprays the return water pipeline, high temperature section internal circulation water inlet channel, the baffle, high temperature section internal circulation water outlet channel, high temperature section coil pipe water distributor is constituteed.
Further, the flue gas waste heat recovery heat exchange equipment is divided into a high-temperature section and a low-temperature section by a water-proof hood.
Further, the high-temperature section consists of a flue gas inlet pipeline, a high-temperature section heat exchange coil, high-temperature section water spraying filler, a high-temperature section sprayer, a high-temperature section spraying water inlet pipeline, a shell, a high-temperature section spraying water return pipeline, a high-temperature section internal circulating water inlet pipeline, a partition plate, a high-temperature section internal circulating water outlet pipeline and a high-temperature section coil water distribution pipe;
the low-temperature section consists of a low-temperature section spraying section, a low-temperature section sprayer, a flue gas outlet pipeline, a low-temperature section spraying water inlet pipeline and a low-temperature section spraying water return pipeline.
Further, the flue gas outlet pipeline, low temperature section sprayer and the low temperature section that is connected spray the inlet channel, the low temperature section sprays the heat transfer section, water proof hood, the low temperature section sprays the return water pipeline, high temperature section sprayer and the high temperature section that is connected spray the inlet channel, high temperature section trickle filler and high temperature section heat transfer coil pipe, high temperature section coil pipe water-locator, high temperature section internal circulation water inlet channel, the baffle, high temperature section internal circulation water outlet conduit, flue gas inlet pipeline, high temperature section spray the return water pipeline from last down setting gradually.
Further, the high-temperature section water spraying filler and the high-temperature section heat exchange coil are arranged in a staggered mode (one layer of filler, the other layer of heat exchange coil and the other layer of heat exchange coil are arranged downwards in a reciprocating mode for a plurality of layers).
Furthermore, the high-temperature section heat exchange coil pipe is made of an outer lining fluoroplastic copper pipe or corrosion-resistant stainless steel, and the high-temperature section water spraying filler is made of PVC or PP.
Further, the high-temperature section heat exchange coil is composed of multiple layers of pipes.
When the device is used, flue gas from a desulfurizing tower enters flue gas waste heat recovery equipment through a flue gas inlet pipeline, then enters a high-temperature section water spraying filler or a high-temperature section heat exchange coil, and carries out countercurrent heat exchange with spray water sprayed by a high-temperature section sprayer in the high-temperature section water spraying filler or high-temperature section heat exchange coil area;
in the high-temperature section, spraying and distributing water by a high-temperature section sprayer, primarily contacting with the flue gas, entering the high-temperature section water spraying filler (layer), further exchanging heat with the flue gas and heating up by the spray water in the high-temperature section water spraying filler, spraying into the high-temperature section heat exchange coil layer, exchanging heat with a heat-carrying medium (internal circulating water) in the high-temperature section heat exchange coil for cooling, entering the high-temperature section water spraying filler layer again after cooling, exchanging heat with the flue gas and heating up again, spraying into the bottom of the flue gas waste heat recovery equipment after reciprocating for a plurality of times, and discharging by a high-temperature section spraying water return pipeline;
the internal circulating water in the high-temperature section heat exchange coil pipe comes from a high-temperature section internal circulating water inlet pipeline, and uniformly distributed into the top-layer high-temperature section heat exchange coil pipe through the high-temperature section coil pipe water distribution pipe, and then after a plurality of processes, the circulating water in the bottommost high-temperature section heat exchange coil pipe is collected into the high-temperature section coil pipe water distribution pipe at the lower part and is sent out through the high-temperature section internal circulating water return pipeline.
The utility model has the advantages that:
the heat exchange coil and the water spraying filler are alternately arranged, so that the heat of the spraying water can be timely transferred to the heat-carrying medium, namely the internal circulating water, in the coil in the heat exchange process with the flue gas, the spraying strength and the water quantity can be greatly reduced, particularly the saturated flue gas with higher temperature, and meanwhile, the internal circulating water is not contacted with the flue gas, so that the water quality of the internal circulating water can be ensured, and the internal circulating water is prevented from being polluted by the flue gas;
through water proof hood, with the spray heat transfer and the high temperature section isolation of flue gas low temperature section, both can realize getting heat according to the flue gas temperature segmentation like this, can avoid the low temperature section again to get the influence of heat process to the high temperature section.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
fig. 3 is a sectional view taken along line B-B in fig. 2.
In the figure: 1-a flue gas inlet duct; 2-high temperature section heat exchange coil pipe; 3-high temperature section water spraying filler; 4-high temperature section sprayer; 5-a water-proof hood; 6-spraying the heat exchange section at the low-temperature section; 7-a low-temperature section sprayer; 8-a flue gas outlet duct; 9-low-temperature section spraying water inlet pipeline; 10-low-temperature section spraying water return pipeline; 11-high temperature section spraying water inlet pipeline; 12-a housing; 13-high temperature section spraying water return pipeline; 14-a high-temperature section internal circulating water inlet pipeline; 15-a separator; 16-a circulating water outlet pipeline in the high-temperature section; 17-high temperature section coil pipe water distribution pipe.
Detailed Description
The technical solution in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present invention based on the embodiments of the present invention.
As shown in fig. 1-3, a flue gas waste heat recovery heat exchange device comprises a flue gas inlet pipeline 1, a high-temperature section heat exchange coil 2, a high-temperature section water spraying filler 3, a high-temperature section sprayer 4, a water-proof hood 5, a low-temperature section spraying heat exchange section 6, a low-temperature section sprayer 7, a flue gas outlet pipeline 8, a low-temperature section spraying water inlet pipeline 9, a low-temperature section spraying water return pipeline 10, a high-temperature section spraying water inlet pipeline 11, a shell 12, a high-temperature section spraying water return pipeline 13, a high-temperature section internal circulation water inlet pipeline 14, a partition plate 15, a high-temperature section internal circulation water outlet pipeline 16 and a high-temperature section coil water distribution pipe 17.
The longitudinal section of the shell 12 is oval, and a cavity is arranged in the shell 12, so that the design is convenient for the installation of other parts and the flow of flue gas to be treated.
The flue gas inlet pipeline 1 is arranged at a position close to the bottom of one side of the shell 12, the bottom of the shell 12 is provided with a high-temperature section spraying water return pipeline 13, and the high-temperature section spraying water return pipeline 13 and the flue gas inlet pipeline 1 are communicated with the inside of the shell 12.
The high-temperature section heat exchange coil 2 and the high-temperature section water spraying filler 3 are arranged in the shell 12 and close to the position above the flue gas inlet pipeline 1, and are used for absorbing energy in flue gas.
The high-temperature section heat exchange coil 2 and the high-temperature section water spraying filler 3 are provided with multiple layers and are arranged in a vertically staggered manner, namely the high-temperature section water spraying filler 3 is arranged between the two high-temperature section heat exchange coils 2 which are vertically adjacent, and the high-temperature section heat exchange coil 2 is arranged between the two high-temperature section water spraying fillers 3 which are vertically adjacent.
The high-temperature section water spraying filler 3 is embedded in the gap of the high-temperature section heat exchange coil 2, and the high-temperature section heat exchange coil 2 adopts a multilayer pipe design.
The high-temperature section heat exchange coil 2 is transversely (horizontally) provided with a plurality of, and the both ends of every high-temperature section heat exchange coil 2 communicate with high-temperature section coil water distributor 17 respectively, and the design is convenient for carry heat-retaining medium (water) to in the high-temperature section heat exchange coil 2 to and the output of heat-retaining medium (water).
The high-temperature section coil water distribution pipe 17 connected to the water inlet end of the high-temperature section heat exchange coil 2 is communicated with the high-temperature section internal circulating water inlet pipeline 14, and the high-temperature section coil water distribution pipe 17 connected to the water outlet end of the high-temperature section heat exchange coil 2 is communicated with the high-temperature section internal circulating water outlet pipeline 16.
And the high-temperature section internal circulating water outlet pipeline 16 and the high-temperature section internal circulating water inlet pipeline 14 are connected with external heating equipment or heat exchange plates through a booster pump or a circulating pump.
The baffle 15 is arranged in the shell 12, and the lower end of the baffle 15 is conical, so that the flue gas is convenient to guide.
The upper end of the partition plate 15 is packaged by a cover plate, the outer edge of the cover plate is fixedly connected with the inner wall of the shell 12, a water-proof hood 5 is fixedly mounted at a position, close to the middle, of the upper end of the cover plate, and a round hole convenient for smoke to rise is formed in a position, corresponding to the water-proof hood 5, on the cover plate.
The cross section of the partition plate 15 is annular and is arranged at a certain distance from the inner wall of the shell 12, and the high-temperature section heat exchange coil 2 and the high-temperature section water spraying filler 3 are respectively arranged on the inner wall of the partition plate 15.
The high-temperature section coil water distribution pipe 17 penetrates through the partition plate 15 and is respectively communicated with the high-temperature section internal circulating water inlet pipeline 14 and the high-temperature section internal circulating water outlet pipeline 16, internal circulating water in the high-temperature section heat exchange coil 2 comes from the high-temperature section internal circulating water inlet pipeline 14 and uniformly distributed through the high-temperature section coil water distribution pipe 17 to enter the top-layer high-temperature section heat exchange coil 2, then after a plurality of processes, circulating water in the bottommost high-temperature section heat exchange coil 2 is collected into the low-portion high-temperature section coil water distribution pipe 17 and is sent out through the high-temperature section internal circulating water return pipeline 16.
The high-temperature section sprayer 4 is arranged in the partition 15 and close to the upper end, and one end of the high-temperature section sprayer 4 extends out of the shell 12 and is communicated with the high-temperature section spraying water inlet pipeline 11.
The flue gas outlet pipeline 8 is arranged at the top of the shell 12, the low-temperature section sprayer 7 is arranged at the position, close to the top, of the shell 12, and the low-temperature section sprayer 7 extends out of the shell 12 and is communicated with the low-temperature section spraying water inlet pipeline 9.
The low-temperature section spraying water inlet pipeline 9 and the high-temperature section spraying water inlet pipeline 11 are communicated with a water source, so that water mist can be sprayed to the smoke conveniently.
The low-temperature section spraying water return pipeline 10 is arranged at the position, close to the upper part of the partition plate 15, on the outer side of the shell 12 and used for draining water.
And a cavity in the shell 12, which is close to the upper part of the water-resisting blast cap 5, is a low-temperature section spraying heat exchange section 6.
When in use, the flue gas from the desulfurizing tower enters the device through a flue gas inlet pipeline 1, then enters a high-temperature section water spraying filler 3 and a high-temperature section heat exchange coil 2 (the high-temperature section water spraying filler 3 and the high-temperature section heat exchange coil 2 are arranged in a staggered way, namely, one layer of filler is arranged, then one layer of heat exchange coil is arranged, and then the other layer of heat exchange coil reciprocates for a plurality of layers), in the area of the high-temperature section water spraying filler 3 or the high-temperature section heat exchange coil 2, the flue gas and the spray water sprayed by the high-temperature section sprayer 4 carry out countercurrent heat exchange, the temperature of the flue gas is reduced, the temperature of the spray water is increased, when the spray water with the increased temperature flows downwards (flows by gravity) through the high-temperature section heat exchange coil 2, the heat is transferred to a heat-carrying medium (internal circulating water) in the coil, then the high-temperature section water spraying filler 3 flows into the flue gas heat exchange, the, is discharged through a high-temperature section spraying water return pipeline 13;
after heat exchange between the flue gas and the high-temperature section spray water is finished, the flue gas leaves the high-temperature section spray water filler and the high-temperature section heat exchange coil pipe area, enters the low-temperature section through the water-proof hood 5, and in the low-temperature section, the flue gas and the atomized spray water sprayed by the low-temperature section sprayer 7 perform countercurrent heat exchange, and finally the flue gas is discharged through a flue gas outlet, and the water in the low-temperature section spray heat exchange section 6 is discharged through the low-temperature section spray water return pipeline 10.
Claims (4)
1. The utility model provides a flue gas waste heat recovery indirect heating equipment which characterized in that: the device comprises a flue gas inlet pipeline, a high-temperature section heat exchange coil, a high-temperature section water spraying filler, a high-temperature section sprayer, a water-proof hood, a low-temperature section spraying heat exchange section, a low-temperature section sprayer, a flue gas outlet pipeline, a low-temperature section spraying water inlet pipeline, a low-temperature section spraying water return pipeline, a high-temperature section spraying water inlet pipeline, a shell, a high-temperature section spraying water return pipeline, a high-temperature section internal circulating water inlet pipeline, a partition plate, a high-temperature section internal circulating water outlet pipeline and a high-temperature section coil water distributor;
the flue gas inlet pipeline is arranged at a position close to the bottom of one side of the shell, the bottom of the shell is provided with a high-temperature section spraying water return pipeline, and the high-temperature section spraying water return pipeline and the flue gas inlet pipeline are both communicated with the inside of the shell;
the high-temperature section heat exchange coil and the high-temperature section water spraying filler are arranged in the shell and close to the position above the flue gas inlet pipeline;
two ends of the high-temperature section heat exchange coil are respectively communicated with a water distribution pipe of the high-temperature section coil;
the high-temperature section coil water distribution pipe connected to the water inlet end of the high-temperature section heat exchange coil is communicated with the high-temperature section internal circulating water inlet pipeline, and the high-temperature section coil water distribution pipe connected to the water outlet end of the high-temperature section heat exchange coil is communicated with the high-temperature section internal circulating water outlet pipeline;
the water distribution pipe of the high-temperature section coil pipe penetrates through the partition plate and is respectively communicated with the high-temperature section internal circulating water inlet pipeline and the high-temperature section internal circulating water outlet pipeline;
one end of the high-temperature section sprayer extends out of the shell and is communicated with the high-temperature section spraying water inlet pipeline;
the low-temperature section sprayer extends out of the shell and is communicated with the low-temperature section spraying water inlet pipeline;
the low-temperature section spraying water return pipeline is arranged at the position, close to the upper part of the partition plate, outside the shell;
and a cavity in the shell, which is close to the upper part of the water-proof blast cap, is a low-temperature section spraying heat exchange section.
2. The flue gas waste heat recovery and heat exchange device of claim 1, characterized in that: the high-temperature section water spraying filler and the high-temperature section heat exchange coil are arranged in a staggered mode.
3. The flue gas waste heat recovery and heat exchange device of claim 1, characterized in that: the water-proof hood divides the inner space of the shell into a high-temperature section and a low-temperature section.
4. The flue gas waste heat recovery and heat exchange device of claim 2, characterized in that: the high-temperature section heat exchange coil is composed of a plurality of layers of pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020515795.0U CN211977633U (en) | 2020-04-10 | 2020-04-10 | Flue gas waste heat recovery indirect heating equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020515795.0U CN211977633U (en) | 2020-04-10 | 2020-04-10 | Flue gas waste heat recovery indirect heating equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211977633U true CN211977633U (en) | 2020-11-20 |
Family
ID=73385504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020515795.0U Active CN211977633U (en) | 2020-04-10 | 2020-04-10 | Flue gas waste heat recovery indirect heating equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211977633U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114857978A (en) * | 2022-04-18 | 2022-08-05 | 南京航空航天大学 | Waste heat recoverer and method combining direct evaporation and indirect evaporation |
-
2020
- 2020-04-10 CN CN202020515795.0U patent/CN211977633U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114857978A (en) * | 2022-04-18 | 2022-08-05 | 南京航空航天大学 | Waste heat recoverer and method combining direct evaporation and indirect evaporation |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106017154B (en) | A kind of heat transmission equipment for flue gas desulfurization | |
| CN108426264B (en) | Device for removing colored smoke plume through synergistic dedusting of recovered smoke waste heat | |
| CN203425678U (en) | Waste heat recovery device of energy-saving environment-friendly coke oven flue | |
| CN204359159U (en) | A kind of horizontal condensing heat exchanger | |
| CN109099451B (en) | Energy-saving emission-reducing white-eliminating five-element heat exchange system for flue gas | |
| CN109395540B (en) | Raw flue gas sensible heat deep utilization regeneration system | |
| CN212618913U (en) | Composite cooling tower and air conditioning system | |
| CN108731012B (en) | Device and method for eliminating wet smoke plume of coal-fired power plant | |
| CN211977633U (en) | Flue gas waste heat recovery indirect heating equipment | |
| CN104457317A (en) | Stand-pipe indirect-direct two-stage evaporative cooling tower | |
| CN103453605B (en) | The power plant vaporation-type condensing plant of indirectly-direct combination | |
| CN203478483U (en) | Composite evaporating and condensing device suitable for power plant | |
| CN110145946B (en) | Water-saving switching type natural ventilation cooling tower | |
| CN203464553U (en) | Novel plate-type evaporative condenser | |
| CN205897909U (en) | A indirect heating equipment for flue gas desulfurization | |
| CN209221801U (en) | A kind of desulphurization system | |
| CN210486571U (en) | Water-saving switching type natural ventilation cooling tower | |
| CN209230336U (en) | Around piece type helical fin formula aerial cooler | |
| CN209771770U (en) | Wet curtain solution dehydrator | |
| CN203464800U (en) | Blowing-type cooling system | |
| CN209797527U (en) | Open circulating water and closed circulating water series-parallel type equipment | |
| CN112815600A (en) | Air cooling absorber and absorption type industrial circulating cooling water cooling system | |
| CN208504788U (en) | A kind of environment-friendly high-efficiency fume hot-water type lithium bromide absorption cold, Hot water units | |
| CN202836308U (en) | Low fin tube and evaporation-cooled device adopting the same | |
| CN208635609U (en) | A kind of efficient heat exchanger |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |