CN215216198U - Boiler feed water preheating device based on waste heat utilization - Google Patents
Boiler feed water preheating device based on waste heat utilization Download PDFInfo
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- CN215216198U CN215216198U CN202121177314.0U CN202121177314U CN215216198U CN 215216198 U CN215216198 U CN 215216198U CN 202121177314 U CN202121177314 U CN 202121177314U CN 215216198 U CN215216198 U CN 215216198U
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- waste heat
- pipe
- dust removal
- heat recoverer
- central dust
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
Abstract
The utility model discloses a boiler feedwater preheating device based on waste heat utilization, including the boiler body, exhaust pipe and inlet tube, waste heat recovery device is installed to one side of boiler body, the vertical central dust removal pipe that is provided with of center department in the waste heat recovery device, equidistant multilayer outlet duct of installing on the central dust removal pipe, be provided with the coil pipe in the waste heat recovery device in the central dust removal outside of tubes, the coil pipe is the heliciform, the lower extreme of coil pipe is connected with the cold water input pipe, install filter and water intaking valve on the cold water input pipe, the warm water output tube is installed to the upper end of coil pipe, install flow control valve on the warm water output tube, the warm water storage tank is installed to the play water end of warm water output tube, the delivery port and the inlet tube intercommunication of warm water storage tank, waste heat recovery device's top is provided with the blast pipe, waste heat recovery device's bottom is provided with the ash discharge bin. The device can realize the functions of dust removal and preheating simultaneously, can improve the utilization rate of flue gas, can reduce the energy consumption of the boiler, and improve the steam production efficiency of the boiler.
Description
Technical Field
The utility model relates to a steam pressurization building block processing equipment technical field, concretely relates to boiler feed water preheating device based on waste heat utilization.
Background
The novel material for the aerated concrete plate building blocks of the fabricated building is an urgent need for improving the resource utilization rate and protecting the environment, and is an important measure for implementing land resource protection and realizing the sustainable development strategy in China. The nation is forcing to push a novel material for building blocks of assembled building aerated concrete plates, and clay bricks are forbidden. In recent years, with the vigorous development of real estate and the continuous investment of infrastructure, the demand for the aerated concrete plate building blocks of the fabricated building is more and more, and the market prospect is very optimistic. In China, the aerated concrete plate building blocks of the fabricated building face a high-speed development period. At present, the manufacturing process of the assembly type building aerated concrete plate building block comprises the working procedures of material mixing, pouring, static curing, cutting, steam curing and the like, a coal-fired boiler is equipment for providing steam for the steam curing, and in the prior art, the discharged flue gas of the coal-fired boiler also contains a large amount of heat in the combustion process, if the flue gas is directly discharged, a large amount of heat is wasted, and the surrounding environment is polluted. Therefore, the boiler feed water preheating device based on waste heat utilization is objectively needed when the boiler feed water preheating device based on waste heat utilization is researched and developed, and has the advantages of reasonable structure and low investment cost, and the utilization rate of heat energy and the steam generation efficiency of a boiler can be improved.
Disclosure of Invention
An object of the utility model is to provide a boiler feedwater preheating device based on waste heat utilization that rational in infrastructure, investment cost are low, can improve the utilization ratio of heat energy, can improve boiler steam production efficiency again.
The utility model aims at realizing the method, which comprises a boiler body, a smoke exhaust pipe and a water inlet pipe which are arranged on the boiler body, a waste heat recoverer is arranged at one side of the boiler body, a central dust removal pipe is vertically arranged at the center of the waste heat recoverer, the gas outlet end of the smoke exhaust pipe is communicated with the upper part of the central dust removal pipe after entering the waste heat recoverer, the upper end of the central dust removal pipe is fixedly connected with the top of the waste heat recoverer, a gap is left between the lower end of the central dust removal pipe and the bottom of the waste heat recoverer, a spiral groove is processed on the inner wall of the central dust removal pipe, a multilayer gas outlet pipe is equidistantly arranged in the vertical direction of the central dust removal pipe, a coil pipe is arranged in the waste heat recoverer at the outer side of the central dust removal pipe, the coil pipe is in a spiral shape, at least 3 support plates are vertically arranged at the outer side of the coil pipe, a plurality of clamping grooves are arranged in the vertical direction of the support plates near one side of the coil pipe, the draw-in groove joint is on the coil pipe outer wall that corresponds, the lower extreme of coil pipe is connected with the cold water input tube of wearing out waste heat recoverer, install filter and water intaking valve on the cold water input tube, the warm water output tube of wearing out waste heat recoverer is installed to the upper end of coil pipe, install the flow control valve on the warm water output tube, the warm water storage tank is installed to the play water end of warm water output tube, the delivery port and the inlet tube intercommunication of warm water storage tank, waste heat recoverer's top is provided with the blast pipe, install discharge valve on the blast pipe, waste heat recoverer's bottom is provided with the ash discharge box, the top of ash discharge box is provided with the movable cover.
Further, the outlet duct includes first slope section and second slope section, and first slope section is the slope upwards to set up on central dust removal outer of tubes wall, and the contained angle between first slope section and the central dust removal pipe is 20 ~ 30, and the tip at first slope section is installed to the second slope section, and the second slope section is the slope and sets up downwards, and the contained angle between second slope section and the first slope section is 50 ~ 60.
Furthermore, each layer of air outlet pipe is circumferentially and uniformly distributed on the central dust removing pipe, and the number of the air outlet pipes of each layer is not less than 4.
Furthermore, the bottom of the waste heat recoverer is arranged to be of a slope type structure, and the ash discharging box is arranged at the lower end of the slope.
Furthermore, sealing rings are arranged at the joint of the cold water input pipe and the waste heat recoverer and the joint of the warm water output pipe and the waste heat recoverer.
Furthermore, a heat-insulating layer is arranged on the outer wall of the waste heat recoverer, and the heat-insulating layer is composed of multiple layers of high-grade centrifugal glass fiber silk floss.
Further, the distance between the lower end of the central dust removal pipe and the bottom of the waste heat recoverer cannot exceed 50 cm.
The utility model discloses in the in-process that uses, the flue gas that the boiler body produced enters into central dust removal through the pipe of discharging fume intraductally, the dust of central dust removal pipe in to the flue gas has the effect of subsiding, let the dust in the flue gas isolate the bottom that falls into waste heat recoverer, discharge into the ash discharge incasement again, and flue gas after the dust removal then through the even distribution in waste heat recoverer behind the outlet duct discharge, carry out the heat exchange with the cold water in the coil, cold water temperature after the heat absorption can reach 60 ~ 70 ℃, enter into the warm water storage tank after discharging through the warm water output tube at last, the rethread inlet tube enters into this internal heating of boiler. This device compares with traditional waste heat recoverer, firstly can realize removing dust and the function of preheating simultaneously, flue gas after removing dust carries out the heat transfer with the coil pipe, avoid the dust to fall into the condition that causes coil pipe heat exchange efficiency low on the coil pipe, under the condition that can reduce equipment investment cost, can effectual assurance heat transfer efficiency, secondly adopt coil pipe and flue gas to carry out the heat transfer, the heat transfer area of coil pipe is great, can effectual improvement heat energy's utilization ratio, warm water after preheating enters into boiler body after, can reduce boiler body's energy consumption, can improve boiler body's steam production efficiency again, and is simple in structure, the advantage that investment cost is low, and easy popularization and use.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
in the figure: 1-a boiler body, 2-a smoke exhaust pipe, 3-a water inlet pipe, 4-a waste heat recoverer, 5-a central dust removal pipe, 6-a spiral groove, 7-an air outlet pipe, 71-a first inclined section, 72-a second inclined section, 8-a coil pipe, 9-a support plate, 10-a cold water input pipe, 11-a filter, 12-a warm water output pipe, 13-a warm water storage tank, 14-an exhaust pipe, 15-an ash discharge box and 16-a heat insulation layer.
Detailed Description
The following further describes the present invention with reference to the attached drawings, but the present invention is not limited in any way, and any changes or improvements based on the teaching of the present invention all belong to the protection scope of the present invention.
As shown in figure 1, the utility model comprises a boiler body 1, a smoke exhaust pipe 2 and a water inlet pipe 3 which are arranged on the boiler body 1, the boiler body 1 adopts a coal-fired boiler structure used in the prior art, a waste heat recoverer 4 is arranged on one side of the boiler body 1, a central dust removal pipe 5 is vertically arranged at the center in the waste heat recoverer 4, the air outlet end of the smoke exhaust pipe 2 is communicated with the upper part of the central dust removal pipe 5 after entering the waste heat recoverer 4, the upper end of the central dust removal pipe 5 is fixedly connected with the top of the waste heat recoverer 4, a gap is left between the lower end of the central dust removal pipe 5 and the bottom of the waste heat recoverer 4, a spiral groove 6 is processed on the inner wall of the central dust removal pipe 5, a plurality of layers of air outlet pipes 7 are equidistantly arranged in the vertical direction of the central dust removal pipe 5, a coil 8 is arranged in the waste heat recoverer 4 outside the central dust removal pipe 5, coil pipe 8 is the heliciform, the outside equipartition of coil pipe 8 is vertical to be provided with 3 piece at least backup pads 9, is provided with a plurality of draw-in grooves in the vertical direction of backup pad 9 that is close to coil pipe 8 one side, the draw-in groove joint is on the 8 outer walls of coil pipe that correspond, and coil pipe 8 is installed in backup pad 9, can guarantee the steadiness of coil pipe 8 installation. The lower end of the coil pipe 8 is connected with a cold water input pipe 10 penetrating out of the waste heat recoverer 4, the cold water input pipe 10 is provided with a filter 11 and a water inlet valve, the filter 11 adopts a water filter which is used conventionally, water is filtered and protected by the filter 11, the phenomenon that impurities in water are blocked in the coil pipe 8 can be avoided, the upper end of the coil pipe 8 is provided with a warm water output pipe 12 penetrating out of the waste heat recoverer 4, the warm water output pipe 12 is provided with a flow control valve, the water discharge quantity of the warm water output pipe can be controlled timely through the flow control valve, the water outlet end of the warm water output pipe 12 is provided with a warm water storage tank 13, the water outlet of the warm water storage tank 13 is communicated with the water inlet pipe 3, the top of the waste heat recoverer 4 is provided with an exhaust pipe 14, the exhaust pipe 14 is provided with an exhaust valve, and the bottom of the waste heat recoverer 4 is provided with an ash discharge tank 15, the top of the ash discharging box 15 is provided with a movable cover.
The working process of the device is as follows: flue gas generated by a boiler body 1 enters a central dust removal pipe 5 through a smoke exhaust pipe 2, the central dust removal pipe 5 has a settling effect on dust in the flue gas, the dust in the flue gas is separated out and falls into the top of a waste heat recoverer 4 and then is discharged into an ash discharge box 15, after the central dust removal pipe is used for a period of time, a movable cover is opened, dust in the ash discharge box 15 is removed, the flue gas after dust removal is discharged through an air outlet pipe 7 and then is uniformly distributed into the waste heat recoverer 4, at the moment, a water inlet valve on a cold water input pipe 10 is opened, cold water filtered through a filter 11 enters a coil pipe 8 through the cold water input pipe 10, the cold water in the coil pipe 8 can absorb heat energy in the flue gas, the cold water and the flue gas carry out heat exchange, the cold water can reach 60-70 ℃ after absorbing heat, at the moment, a flow control valve is opened, warm water in the coil pipe 8 can be discharged through a warm water output pipe 12 and then enters a warm water storage tank 13, then enters the boiler body 1 through the water inlet pipe 3 for heating, and the exhaust valve can be opened to discharge the flue gas in the waste heat recoverer 4 when necessary. This device compares with traditional waste heat recoverer, firstly can realize removing dust and the function of preheating simultaneously, flue gas after removing dust carries out the heat transfer with coil pipe 8, avoid the dust to fall into the condition that causes 8 heat exchange efficiency of coil pipe low on the coil pipe 8, and under the condition that can reduce equipment investment cost, can effectual efficiency of guaranteeing the heat transfer, secondly adopt 8 and flue gas to carry out the heat transfer, 8's of coil pipe heat transfer area is great, can effectual improvement heat energy's utilization ratio, warm water after preheating enters into boiler body 1 after, can reduce boiler body 1's energy consumption, can improve boiler body 1's steam production efficiency again, and has the advantages of simple structure, and investment cost is low.
Further, in order to achieve better dust removal and preheating effects, the outlet pipe 7 includes a first inclined section 71 and a second inclined section 72, the first inclined section 71 is obliquely and upwardly disposed on the outer wall of the central dust removal pipe 5, an included angle between the first inclined section 71 and the central dust removal pipe 5 is 20 to 30 °, the second inclined section 72 is mounted at the end of the first inclined section 71, the second inclined section 72 is obliquely and downwardly disposed, an included angle between the second inclined section 72 and the first inclined section 71 is 50 to 60 °, the first inclined section 71 is obliquely and upwardly configured to prevent dust in the central dust removal pipe 5 from being discharged from the outlet pipe 7, so that the dust removal efficiency can be further improved, the second inclined section 72 is obliquely and downwardly configured to enable the dust-removed flue gas to flow downwardly and uniformly distribute in the whole waste heat recoverer 4, thereby further improving the heat exchange effect.
Further, every layer of outlet duct 7 is the circumference equipartition on central dust removal pipe 5, and 4 are no less than to every layer of quantity of outlet duct 7, and 7 the number of piles of outlet duct are relative with 8 the number of piles of coil pipe, can improve the heat transfer effect of flue gas and coil pipe 8, guarantee that the warm water temperature in the coil pipe 8 is more even.
In order to exhaust dust at the bottom of the waste heat recoverer 4 in time, the bottom of the waste heat recoverer 4 is arranged to be of a slope type structure, and the dust exhaust box 15 is arranged at one lower end of the slope.
In order to avoid the escape of dust in the preheating recoverer 4, sealing rings are arranged at the joint of the cold water input pipe 10 and the waste heat recoverer 4 and the joint of the warm water output pipe 12 and the waste heat recoverer 4.
In order to further improve the utilization rate of the flue gas waste heat, an insulating layer 16 is arranged on the outer wall of the waste heat recoverer 4, and the insulating layer 16 is composed of multiple layers of high-grade centrifugal glass fiber silk floss.
Preferably, the distance between the lower end of the central dust removal pipe 5 and the bottom of the waste heat recovery device 4 is not more than 50cm, so that the settled dust can fall into the bottom of the waste heat recovery device 4, and the dust is not easy to suspend at the bottom of the waste heat recovery device 4.
Claims (7)
1. The utility model provides a boiler feedwater preheating device based on waste heat utilization, includes boiler body (1), sets up tub (2) and inlet tube (3) of discharging fume on boiler body (1), its characterized in that: a waste heat recoverer (4) is installed on one side of the boiler body (1), a central dust removal pipe (5) is vertically arranged at the center in the waste heat recoverer (4), the air outlet end of the smoke exhaust pipe (2) enters the waste heat recoverer (4) and then is communicated with the upper portion of the central dust removal pipe (5), the upper end of the central dust removal pipe (5) is fixedly connected with the top of the waste heat recoverer (4), a gap is reserved between the lower end of the central dust removal pipe (5) and the bottom of the waste heat recoverer (4), a spiral groove (6) is processed on the inner wall of the central dust removal pipe (5), a plurality of layers of air outlet pipes (7) are installed on the central dust removal pipe (5) in an equidistant mode in the vertical direction, a coil pipe (8) is arranged in the waste heat recoverer (4) on the outer side of the central dust removal pipe (5), the coil pipe (8) is spiral, at least 3 support plates (9) are vertically and uniformly distributed on the outer side of the coil pipe (8), a plurality of clamping grooves are formed in the vertical direction of a supporting plate (9) close to one side of a coil pipe (8), the clamping grooves are clamped on the outer wall of the corresponding coil pipe (8), the lower end of the coil pipe (8) is connected with a cold water input pipe (10) penetrating out of a waste heat recoverer (4), a filter (11) and a water inlet valve are installed on the cold water input pipe (10), a warm water output pipe (12) penetrating out of the waste heat recoverer (4) is installed at the upper end of the coil pipe (8), a flow control valve is installed on the warm water output pipe (12), a warm water storage tank (13) is installed at the water outlet end of the warm water output pipe (12), the water outlet of the warm water storage tank (13) is communicated with a water inlet pipe (3), an exhaust pipe (14) is arranged at the top of the waste heat recoverer (4), an exhaust valve is installed on the exhaust pipe (14), and an ash discharge box (15) is arranged at the bottom of the waste heat recoverer (4), the top of the ash discharging box (15) is provided with a movable cover.
2. The boiler feed water preheating device based on waste heat utilization according to claim 1, characterized in that: outlet duct (7) include first slope section (71) and second slope section (72), first slope section (71) is the slope and upwards sets up on central dust removal pipe (5) outer wall, the contained angle between first slope section (71) and central dust removal pipe (5) is 20 ~ 30, the tip at first slope section (71) is installed in second slope section (72), and second slope section (72) is the slope and sets up downwards, the contained angle between second slope section (72) and first slope section (71) is 50 ~ 60.
3. The boiler feed water preheating device based on waste heat utilization according to claim 1, characterized in that: each layer of air outlet pipes (7) are uniformly distributed on the central dust removing pipe (5) in a circumferential manner, and the number of each layer of air outlet pipes (7) is not less than 4.
4. The boiler feed water preheating device based on waste heat utilization according to claim 1, characterized in that: the bottom of the waste heat recoverer (4) is arranged to be of a slope type structure, and the ash discharge box (15) is arranged at the lower end of the slope.
5. The boiler feed water preheating device based on waste heat utilization according to claim 1, characterized in that: and sealing rings are arranged at the joint of the cold water input pipe (10) and the waste heat recoverer (4) and the joint of the warm water output pipe (12) and the waste heat recoverer (4).
6. The boiler feed water preheating device based on waste heat utilization according to claim 1, characterized in that: an insulating layer (16) is arranged on the outer wall of the waste heat recoverer (4), and the insulating layer (16) is composed of multiple layers of high-grade centrifugal glass fiber silk floss.
7. The boiler feed water preheating device based on waste heat utilization according to claim 1, characterized in that: the distance between the lower end of the central dust removal pipe (5) and the bottom of the waste heat recoverer (4) is not more than 50 cm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121177314.0U CN215216198U (en) | 2021-05-28 | 2021-05-28 | Boiler feed water preheating device based on waste heat utilization |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121177314.0U CN215216198U (en) | 2021-05-28 | 2021-05-28 | Boiler feed water preheating device based on waste heat utilization |
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| CN215216198U true CN215216198U (en) | 2021-12-17 |
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| CN202121177314.0U Active CN215216198U (en) | 2021-05-28 | 2021-05-28 | Boiler feed water preheating device based on waste heat utilization |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114705064A (en) * | 2022-03-30 | 2022-07-05 | 南京华电节能环保股份有限公司 | Raw coke oven gas waste heat recycling device for coke oven ascension pipe |
-
2021
- 2021-05-28 CN CN202121177314.0U patent/CN215216198U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114705064A (en) * | 2022-03-30 | 2022-07-05 | 南京华电节能环保股份有限公司 | Raw coke oven gas waste heat recycling device for coke oven ascension pipe |
| CN114705064B (en) * | 2022-03-30 | 2023-06-13 | 南京华电节能环保股份有限公司 | Raw gas waste heat recycling device for coke oven rising pipe |
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