CN107013896B - Steam supply system for paperboard production - Google Patents
Steam supply system for paperboard production Download PDFInfo
- Publication number
- CN107013896B CN107013896B CN201710232218.3A CN201710232218A CN107013896B CN 107013896 B CN107013896 B CN 107013896B CN 201710232218 A CN201710232218 A CN 201710232218A CN 107013896 B CN107013896 B CN 107013896B
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- Prior art keywords
- water
- water tank
- smoke
- steam
- liquid level
- 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.)
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 239000011087 paperboard Substances 0.000 title claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 123
- 239000000779 smoke Substances 0.000 claims abstract description 44
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000003546 flue gas Substances 0.000 claims abstract description 31
- 239000007788 liquid Substances 0.000 claims abstract description 28
- 238000002485 combustion reaction Methods 0.000 claims abstract description 18
- 239000002245 particle Substances 0.000 claims abstract description 13
- 239000002918 waste heat Substances 0.000 claims abstract description 9
- 238000003860 storage Methods 0.000 claims description 5
- 238000002309 gasification Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000008929 regeneration Effects 0.000 claims description 3
- 238000011069 regeneration method Methods 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 abstract description 6
- 238000011084 recovery Methods 0.000 abstract description 3
- 238000007599 discharging Methods 0.000 abstract description 2
- 238000005086 pumping Methods 0.000 description 2
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/16—Feed-water heaters, i.e. economisers or like preheaters with water tubes arranged otherwise than in the boiler furnace, fire tubes, or flue ways
- F22D1/18—Feed-water heaters, i.e. economisers or like preheaters with water tubes arranged otherwise than in the boiler furnace, fire tubes, or flue ways and heated indirectly
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/04—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material using washing fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Air Supply (AREA)
Abstract
The invention relates to a steam supply system used in paperboard production, comprising a combustion furnace with a water inlet pipeline, a smoke exhaust pipeline and a steam exhaust pipeline; a water supply unit; the heat recovery unit is used for recovering the waste heat of the flue gas and comprises a water tank with an opening at the top; one end part of the smoke guide pipeline extends into the liquid level of the water tank, and the other end part of the smoke guide pipeline is communicated with the smoke exhaust pipeline; coiled pipe which is positioned in the liquid level of the water tank and two ends of which are respectively communicated with the water supply unit and the water inlet pipeline; and the grids are positioned in the water tank and are used for discharging smoke to the grids for blocking flow layer by layer, wherein the smoke guide pipeline extends into the liquid level of the water tank, the grids are arranged in an intersecting manner with the part of the smoke guide pipeline extending into the water tank, and particles in the smoke are deposited at the bottom of the water tank through meshes on the grids. According to the invention, on the premise that the flue gas is not directly discharged to the atmosphere, the waste heat of the flue gas can be recovered to preheat water entering the combustion furnace, and particles in the flue gas can be deposited and collected, so that the energy is saved, the environment is protected, and the haze is reduced.
Description
Technical Field
The present invention relates to a steam supply system for use in the production of board.
Background
In the compounding process of the paperboards, steam is needed to heat the conveying rollers, so that the rollers dry the paper sheets, and the flatness of the paperboards after production is ensured.
Currently, common steam supply systems include a burner with a water inlet, a smoke outlet, and a steam outlet; and a water supply unit for supplying water to the combustion furnace.
However, the flue gas exhausted from the flue gas outlet has pollution, and the temperature of the flue gas is higher, so that the flue gas does not meet the national energy conservation and emission reduction policy, and therefore, a plurality of factories recycle the temperature of the flue gas and preheat water entering the combustion furnace by waste heat, thereby reducing energy consumption.
Although the steam supply system can save energy, the flue gas contains suspended particles which are not fully combusted, and the suspended particles are directly discharged to the atmosphere, so that the atmosphere (directly related to haze) is polluted, and the energy is wasted.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects of the prior art, and provides an improved steam supply system for paperboard production, which can not only recover the waste heat of flue gas to preheat water entering a combustion furnace, but also deposit and collect particles in the flue gas on the premise of not directly exhausting the flue gas to the atmosphere, thereby saving energy, protecting the environment and reducing haze.
In order to solve the technical problems, the invention adopts the following technical scheme:
a steam supply system for use in paperboard production, comprising a burner having a water inlet conduit, a smoke exhaust conduit, and a steam exhaust conduit; a water supply unit for supplying water to the combustion furnace; the heat recovery unit is used for recovering the waste heat of the flue gas and comprises a water tank with an opening at the top; one end part of the smoke guide pipeline extends into the liquid level of the water tank, and the other end part of the smoke guide pipeline is communicated with the smoke exhaust pipeline; coiled pipe which is positioned in the liquid level of the water tank and two ends of which are respectively communicated with the water supply unit and the water inlet pipeline; and the grids are positioned in the water tank and are used for discharging smoke to the grids for blocking flow layer by layer, wherein the smoke guide pipeline extends into the liquid level of the water tank, the grids are arranged in an intersecting manner with the part of the smoke guide pipeline extending into the water tank, and particles in the smoke are deposited at the bottom of the water tank through meshes on the grids.
Preferably, the coil is a serpentine tube.
Specifically, the serpentine pipe is arranged horizontally between two adjacent grids and is positioned in the middle of the water tank.
Further, the grid is horizontally arranged, and the part of the smoke guide pipeline extending into the water tank is vertically arranged with the grid.
According to a specific and preferred aspect of the present invention, the steam supply system further comprises a tank cover for closing the top of the water tank and forming a cavity, and a gas duct for communicating the cavity with the steam exhaust pipe.
Preferably, a water supply pump is provided between the coil and the water intake pipe, the water supply pump being capable of intermittently pumping the preheated water in the coil into the burner.
Further, the water supply pump is also communicated with the liquid storage tank after steam is used through a branch pipe, so that water formed after steam gasification is returned to the combustion furnace again.
According to still another specific implementation and preferred aspect of the invention, a plug for preventing water from entering the smoke guide pipeline is arranged at the end part of the smoke guide pipeline extending into the water tank, and the distance between the plug and the bottom surface of the water tank is 2/3-5/6 of the height of the liquid level. In this example, the distance between the plug and the bottom surface of the water tank is 3/4 of the height of the liquid level.
Preferably, the plug is in a truncated cone shape with the outer diameter gradually becoming larger from top to bottom. The air flow is convenient to scatter, series flow is prevented, and flow blocking of the grille is convenient.
In addition, the steam supply system further comprises a sensor capable of monitoring the lowest liquid level in the water tank, a water pipe capable of automatically adding water into the water tank according to information of the sensor, and a water pump, wherein the position of the sensor corresponds to the lower end part of the smoke guide pipeline extending into the water tank, and the lower end part is ensured to be always below the liquid level. Preventing the flue gas from being directly discharged to the atmosphere.
Due to the implementation of the technical scheme, compared with the prior art, the invention has the following advantages:
according to the invention, on the premise that the flue gas is not directly discharged to the atmosphere, the waste heat of the flue gas can be recovered to preheat water entering the combustion furnace, and particles in the flue gas can be deposited and collected, so that the energy is saved, the environment is protected, and the haze is reduced.
Drawings
The invention will now be described in further detail with reference to the accompanying drawings and specific examples:
FIG. 1 is a schematic front view of a steam supply system according to the present invention;
wherein, 1, a combustion furnace; 10. a water inlet pipe; 11. a smoke exhaust duct; 12. a steam exhaust pipeline; 2. a water supply unit; 20. a water storage tank; 21, 13, water pipes; 3. a heat regeneration unit; 30. a water tank; 31. a smoke guide pipe; 32. coiled tubing (serpentine); 33. a grille; 4. a slot cover; 40. a cavity; 41. a joint; 5. an air duct; 6. a water supply pump; 7. a branch pipe; 8. a plug; 9. a sensor (liquid level); A. a liquid storage tank.
Detailed Description
As shown in fig. 1, the steam supply system for use in paperboard production provided in this embodiment includes a burner 1 having a water inlet pipe 10, a smoke exhaust pipe 11, and a steam exhaust pipe 12; a water supply unit 2 for supplying water to the combustion furnace 1; and a heat recovery unit 3 for recovering the waste heat of the flue gas.
A water supply unit 2 comprising a reservoir 20 and a water pipe 21.
The heat regeneration unit 3 includes a water tank 30 having an opening at the top; a smoke guide pipe 31 having one end portion extending into the liquid level of the water tank 30 and the other end portion communicating with the smoke discharge pipe 11; a coil pipe 32 positioned in the liquid level of the water tank 30 and having both ends respectively communicating with the water supply unit 2 and the water intake pipe 10; and a grating 33 positioned in the water tank 30 and blocking flow layer by layer along the exhaust direction of the flue gas, wherein the flue gas guide pipeline 31 extends into the liquid level of the water tank 30, the grating 33 is intersected with the part of the flue gas guide pipeline 31 extending into the water tank 30, and particles in the flue gas are deposited at the bottom of the water tank 30 through meshes on the grating 33.
Specifically, the grill 33 is horizontally disposed, and a portion of the smoke guide pipe 31 extending into the water tank 30 is vertically disposed with respect to the grill 33.
In this example, the purpose of using the grille 33 is two: 1. the flow blocking effect can be achieved, the air flow is intercepted layer by layer, and series flow is prevented, so that the flue gas is fully treated; 2. particles in the air flow can be intercepted under the screen, and the particles are deposited at the bottom of the water tank, so that the further treatment of the particles is facilitated.
The coil 32 is a serpentine pipe, and both ends thereof are respectively connected to the water pipe 21 and the water intake pipe 10.
Specifically, the serpentine tube 32 is horizontally disposed between adjacent two grids 33 and is positioned at the middle of the water tank 30.
The above steam supply system further includes a tank cover 4 for closing the top of the water tank 30 and forming a cavity 40, and an air duct 5 for communicating the cavity 40 with the steam exhaust pipe 12. Mixing the steam generated by heating the smoke and the steam generated by the combustion furnace, and introducing the mixture into equipment needing steam, so that the energy is saved and the environment is protected.
The top of the groove cover 4 is provided with a joint 41, and the smoke guide pipeline 31 is connected with the joint 41 in a sealing way.
A water supply pump 6 is provided between the coil 32 and the water intake pipe 10, and the water supply pump 6 is capable of intermittently pumping the water preheated in the coil 32 into the burner 1.
Further, the water supply pump 6 is also communicated with the liquid storage tank A after steam is used through a branch pipe 7, so that water formed after steam gasification is returned to the combustion furnace 1 again.
Meanwhile, a plug 8 for preventing water from entering the smoke guide pipeline 31 is arranged at the end part of the smoke guide pipeline 31 extending into the water tank 30, and the distance between the plug 8 and the bottom surface of the water tank 30 is 2/3-5/6 of the liquid level.
In this example, the distance between the plug 8 and the bottom surface of the water tank is 3/4 of the height of the liquid level.
Specifically, the plug 8 has a truncated cone shape with an outer diameter gradually increasing from top to bottom. The air flow is convenient to scatter, series flow is prevented, and flow blocking of the grille is convenient. While the plug 8 is commercially available and has a one-way valve control, outside water does not enter the interior of the tube, and smoke inside the tube can exit the plug.
In addition, the steam supply system further comprises a sensor 9 capable of monitoring the lowest liquid level in the water tank 30, a water pipe 13 capable of automatically adding water into the water tank 30 according to the information of the sensor, and a water pump, wherein the position of the sensor 9 corresponds to the lower end part of the smoke guide pipe 31 extending into the water tank 30, and the lower end part is ensured to be always below the liquid level. Preventing the flue gas from being directly discharged to the atmosphere.
In summary, the flue gas exhausted by the combustion furnace can be fully used, on the premise that the flue gas is not directly exhausted to the atmosphere, the waste heat of the flue gas can be recovered to preheat water entering the combustion furnace, particles in the flue gas can be deposited and collected, and the steam generated by preheating and the steam generated by the combustion furnace are mixed and led into the using equipment, so that the energy is saved, the environment is protected, the haze is reduced, and the technical effect is very remarkable and is not a conventional means.
The present invention has been described in detail with the purpose of enabling those skilled in the art to understand the contents of the present invention and to implement the same, but not to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of the present invention.
Claims (5)
1. A steam supply system for use in paperboard production, comprising a burner having a water inlet conduit, a smoke exhaust conduit, and a steam exhaust conduit; a water supply unit for supplying water to the combustion furnace; a backheating unit for retrieving flue gas waste heat, its characterized in that: the heat regeneration unit comprises a water tank with an opening at the top; one end part of the smoke guide pipeline extends into the liquid level of the water tank, and the other end part of the smoke guide pipeline is communicated with the smoke exhaust pipeline; the coil pipe is positioned in the liquid level of the water tank, and the two ends of the coil pipe are respectively communicated with the water supply unit and the water inlet pipeline; a grid positioned in the water tank and choked flow layer by layer along the exhaust direction of the flue gas; the smoke guide pipeline stretches into the liquid level of the water tank, the grating is intersected with the part of the smoke guide pipeline stretching into the water tank, and particles in the smoke are deposited at the bottom of the water tank through meshes on the grating;
the coil pipe is a coiled pipe which is horizontally arranged between two adjacent grids and is positioned in the middle of the water tank;
the steam supply system also comprises a tank cover for closing the top of the water tank and forming a cavity, and an air duct for communicating the cavity with the steam discharge pipeline;
the water supply pump is arranged between the coil pipe and the water inlet pipeline, the water supply pump can intermittently pump the preheated water in the coil pipe into the combustion furnace, and the water supply pump is also communicated with the liquid storage tank after steam is used through a branch pipe, so that the water formed after steam gasification returns to the combustion furnace again.
2. A steam supply system for use in the production of paperboard as in claim 1, wherein: the grid is horizontally arranged, and the part of the smoke guide pipeline extending into the water tank is vertically arranged with the grid.
3. A steam supply system for use in the production of paperboard as in claim 1, wherein: the end part of the smoke guide pipeline extending into the water tank is provided with a plug for preventing water from entering the smoke guide pipeline, and the distance between the plug and the bottom surface of the water tank is 2/3-5/6 of the height of the liquid level.
4. A steam supply system for use in the production of paperboard according to claim 3, characterized in that: the outer diameter of the plug is gradually increased from top to bottom in a round table shape.
5. A steam supply system for use in the production of paperboard as in claim 1, wherein: the steam supply system further comprises a sensor capable of monitoring the lowest liquid level in the water tank, a water pipe capable of automatically adding water into the water tank according to the information of the sensor, and a water pump, wherein the position of the sensor corresponds to the lower end part of the smoke guide pipeline extending into the water tank, and the lower end part is ensured to be always below the liquid level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710232218.3A CN107013896B (en) | 2017-04-10 | 2017-04-10 | Steam supply system for paperboard production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710232218.3A CN107013896B (en) | 2017-04-10 | 2017-04-10 | Steam supply system for paperboard production |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107013896A CN107013896A (en) | 2017-08-04 |
| CN107013896B true CN107013896B (en) | 2024-03-12 |
Family
ID=59445594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710232218.3A Active CN107013896B (en) | 2017-04-10 | 2017-04-10 | Steam supply system for paperboard production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107013896B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108361682B (en) * | 2017-12-29 | 2019-07-12 | 吉林省同心热力有限责任公司 | A kind of energy-saving combustion furnace of haze formula or boiler |
| CN112815289A (en) * | 2020-12-31 | 2021-05-18 | 成都市汇鑫达机械有限公司 | Novel energy-saving environment-friendly coil pipe type steam boiler |
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| CN202485019U (en) * | 2012-03-03 | 2012-10-10 | 潍坊创高信息科技有限公司 | Multifunctional boiler smoke processing device |
| CN203771379U (en) * | 2014-01-02 | 2014-08-13 | 代茂道 | Boiler tail gas waste heat recycling device |
| CN204629542U (en) * | 2015-05-11 | 2015-09-09 | 郑州大学 | Gas cleaning and waste heat recovery heating plant |
| CN204787266U (en) * | 2015-05-28 | 2015-11-18 | 李世杰 | Gas boiler |
| CN105090921A (en) * | 2015-09-17 | 2015-11-25 | 哈尔滨市金京锅炉有限公司 | Energy-saving environmentally-friendly steam boiler |
| CN105546821A (en) * | 2016-01-07 | 2016-05-04 | 程宝华 | Fog and haze reducing heat recovery device for gas boiler |
| CN205299571U (en) * | 2016-01-18 | 2016-06-08 | 解元生 | Environmental protection backheat formula boiler |
| CN106287769A (en) * | 2016-08-09 | 2017-01-04 | 江苏杰英能源科技有限公司 | A kind of flue gas cold treatment device |
| CN206617919U (en) * | 2017-04-10 | 2017-11-07 | 苏州庆丰包装材料有限公司 | For the steam supply system in production |
-
2017
- 2017-04-10 CN CN201710232218.3A patent/CN107013896B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202485019U (en) * | 2012-03-03 | 2012-10-10 | 潍坊创高信息科技有限公司 | Multifunctional boiler smoke processing device |
| CN203771379U (en) * | 2014-01-02 | 2014-08-13 | 代茂道 | Boiler tail gas waste heat recycling device |
| CN204629542U (en) * | 2015-05-11 | 2015-09-09 | 郑州大学 | Gas cleaning and waste heat recovery heating plant |
| CN204787266U (en) * | 2015-05-28 | 2015-11-18 | 李世杰 | Gas boiler |
| CN105090921A (en) * | 2015-09-17 | 2015-11-25 | 哈尔滨市金京锅炉有限公司 | Energy-saving environmentally-friendly steam boiler |
| CN105546821A (en) * | 2016-01-07 | 2016-05-04 | 程宝华 | Fog and haze reducing heat recovery device for gas boiler |
| CN205299571U (en) * | 2016-01-18 | 2016-06-08 | 解元生 | Environmental protection backheat formula boiler |
| CN106287769A (en) * | 2016-08-09 | 2017-01-04 | 江苏杰英能源科技有限公司 | A kind of flue gas cold treatment device |
| CN206617919U (en) * | 2017-04-10 | 2017-11-07 | 苏州庆丰包装材料有限公司 | For the steam supply system in production |
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| CN107013896A (en) | 2017-08-04 |
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