CN112963826A - Cyclone combustion-supporting boiler with flue gas recirculation - Google Patents
Cyclone combustion-supporting boiler with flue gas recirculation Download PDFInfo
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- CN112963826A CN112963826A CN202110152369.4A CN202110152369A CN112963826A CN 112963826 A CN112963826 A CN 112963826A CN 202110152369 A CN202110152369 A CN 202110152369A CN 112963826 A CN112963826 A CN 112963826A
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- water
- flue gas
- combustion
- boiler
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
- F23B60/00—Combustion apparatus in which the fuel burns essentially without moving
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L5/00—Blast-producing apparatus before the fire
- F23L5/02—Arrangements of fans or blowers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
- F24H1/34—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water chamber arranged adjacent to the combustion chamber or chambers, e.g. above or at side
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
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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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Solid-Fuel Combustion (AREA)
Abstract
The invention discloses a flue gas recirculation swirl combustion-supporting boiler, which belongs to the technical field of boiler equipment and comprises a boiler body, wherein a combustion hearth is arranged in the boiler body, a grate is paved at the bottom of the combustion hearth, a coal bed is arranged above the grate, a combustion chamber is arranged in the combustion hearth above the grate, an air supply pipe for introducing fresh air is arranged below the grate, and a combustion-supporting air pipe for circulating flame retardance of flue gas is arranged above the grate, so that flames of the coal bed are gathered and heat exchange water pipes above the grate are heated, the heat utilization efficiency is high, in addition, the flue gas waste heat is absorbed by cold water in a water supplementing tank to preheat cold water, the heat utilization efficiency is improved, in addition, the water in the water supplementing tank is conveniently supplemented to enter the water tank, the water in the water tank is ensured to be always at a high.
Description
Technical Field
The invention relates to the technical field of energy-saving boilers, in particular to a cyclone combustion-supporting boiler with flue gas recirculation.
Background
The boiler is an important device for heating and production in the present society, main fuels are coal, biomass, oil, gas and the like, and combustible gas can not be completely combusted due to various reasons in the combustion process, so that carbon black is discharged into the atmosphere along with flue gas. The existing boiler has the problems of insufficient combustion, low combustion efficiency and discharge of a large amount of waste gases such as carbon dioxide, carbon monoxide and the like in the use process. Therefore, it is necessary to improve the combustion efficiency of the boiler, to fully combust the fuel in the flue gas, to save energy, and to improve the living environment of human beings.
Therefore, when fuel is burning in current boiler, there is the insufficient problem of burning, in order to avoid the high fever flue gas direct discharge that contains waste gas such as carbon monoxide, carbon black that the insufficient combustion produced, reasonable effectual with flue gas circulation utilization, combustion-supporting to fuel burning to guarantee that the flue gas waste heat obtains make full use of, avoid the boiler inner water tank dry combustion problem, need provide the combustion-supporting boiler of whirl of flue gas recirculation, aim at solving above-mentioned problem.
Disclosure of Invention
Aiming at the defects in the prior art, the embodiment of the invention aims to provide a cyclone combustion-supporting boiler with flue gas recirculation, so as to solve the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme:
the cyclone combustion-supporting boiler comprises a boiler body, wherein a combustion furnace is arranged inside the boiler body, a grate is laid at the bottom of the combustion furnace, a coal bed is arranged above the grate, a combustion chamber is arranged in the combustion furnace above the grate, an air supply pipe is arranged below the grate, a combustion-supporting air pipe is further arranged on the inner wall of the boiler body on the upper side of the grate, the combustion-supporting air pipe is communicated with a flue gas circulating pipe, the flue gas circulating pipe is communicated with a gas collecting chimney, the gas collecting chimney is arranged at the top of the boiler body, a water tank is arranged in the combustion chamber right above the grate, the water tank is connected with heat exchange water pipes, the heat exchange water pipes are communicated with a distributor, the distributor is communicated with a water supplementing tank through a constant-pressure water supplementing assembly, a flue gas heat exchange pipe.
As a further proposal of the invention, a boiler opening is arranged on the boiler body on the upper side surface of the fire grate, and a furnace door is arranged at the boiler opening.
As a further scheme of the invention, a plurality of air inlet holes are arranged on the blast pipe, the blast pipe is communicated with a circulating fan, the circulating fan is arranged on the flue gas circulating pipe, the combustion-supporting air pipes are annularly distributed on the outer side of the coal bed, and a plurality of exhaust holes are arranged on the combustion-supporting air pipes.
As a further scheme of the invention, the middle part of the water tank is provided with a heat exchange water pipe which is contacted with flame in the combustion chamber, and the water replenishing tank is positioned at the top of the boiler body.
As a further scheme of the invention, an air suction valve is arranged at the joint of the flue gas circulation pipe and the gas collection chimney, the air suction valve consists of a valve plate and a pin shaft, the valve plate is hinged on the inner wall of the gas collection chimney through the pin shaft, and the valve plate is positioned at the pipe opening of the flue gas circulation pipe.
As a further scheme of the invention, the constant-pressure water supplementing assembly comprises a water supplementing channel and a constant-pressure water supplementing valve arranged in the water supplementing channel, the top of the water supplementing channel is communicated with a water supplementing tank, the bottom of the water supplementing channel is communicated with a distributor, the water supplementing tank is communicated with a water injecting pipe, and a water outlet pipe is arranged on the water tank.
As a further scheme of the invention, the constant-pressure water replenishing valve comprises a water replenishing ball valve core, a water replenishing spring and a water replenishing fixing seat, wherein the water replenishing fixing seat is fixed at the bottom of a water replenishing channel, the water replenishing ball valve core is of a spherical structure, the water replenishing spring is arranged between the water replenishing ball valve core and the water replenishing fixing seat, and the water replenishing ball valve core is plugged at a variable diameter port in the middle of the water replenishing channel.
As a further scheme of the invention, the flue gas heat exchange tube is of a zigzag or spiral structure and is positioned in the water replenishing tank.
In summary, compared with the prior art, the embodiment of the invention has the following beneficial effects:
the cyclone combustion-supporting boiler with the flue gas recirculation has the advantages that the air supply pipe for introducing fresh air is arranged below the grate, the combustion-supporting air pipe for circulating and flame-retarding flue gas is arranged above the grate, flames of a coal bed are gathered and heat exchange water pipes above the coal bed, the heat utilization efficiency is high, the flue gas waste heat is absorbed by cold water in the water replenishing tank to preheat cold water, the heat utilization efficiency is improved, water in the water replenishing tank can be conveniently replenished into the water tank, the water in the water tank is ensured to be always at a high liquid level, and dry burning is avoided.
To more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Drawings
Fig. 1 is a schematic structural diagram of a flue gas recirculation swirl combustion-supporting boiler provided by the invention.
FIG. 2 is a schematic structural diagram of a water replenishing tank communicating water tank of a cyclone combustion-supporting boiler with flue gas recirculation provided by the invention.
FIG. 3 is a schematic structural diagram of a flue gas heat exchange tube of a flue gas recirculation swirl combustion-supporting boiler provided by the invention.
FIG. 4 is a schematic structural diagram of a constant pressure water supplement assembly of a cyclone combustion-supporting boiler with flue gas recirculation provided by the invention.
Fig. 5 is a schematic structural diagram of an air suction valve of a cyclone combustion-supporting boiler with flue gas recirculation provided by the invention.
FIG. 6 is a top view of a water tank of a cyclone combustion-supporting boiler with flue gas recirculation provided by the invention.
Reference numerals: 1-boiler body, 2-fire grate, 3-coal bed, 4-combustion hearth, 5-blower, 6-air inlet pipe, 7-blast pipe, 8-air inlet hole, 9-circulating fan, 10-flue gas circulating pipe, 11-combustion-supporting air pipe, 12-combustion chamber, 13-water tank, 14-heat exchange water pipe, 15-distributor, 16-constant pressure water replenishing component, 17-water replenishing tank, 18-constant pressure water replenishing valve, 19-water replenishing channel, 20-water replenishing ball valve core, 21-water replenishing spring, 22-water replenishing fixing seat, 23-flue gas discharge pipe, 24-flue gas heat exchange pipe, 25-gas collecting chimney, 26-air suction valve, 27-valve plate and 28-pin shaft.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are shown in the drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
The technical solution of the present invention is further described with reference to the accompanying drawings and specific embodiments.
Example 1
Referring to fig. 1 and 2, a cyclone combustion-supporting boiler with flue gas recirculation includes a boiler body 1, a combustion furnace 4 is arranged inside the boiler body 1, a grate 2 is laid at the bottom of the combustion furnace 4, a coal seam 3 is arranged above the grate 2, the coal seam 3 is added from a boiler opening located on one side above the grate 2, a furnace door is arranged at the boiler opening, a combustion chamber 12 is arranged in the combustion furnace 4 above the grate 2, in order to facilitate combustion of the coal seam 3 on the grate 2, an air supply pipe 7 is arranged below the grate 2, a plurality of air inlet holes 8 are arranged on the air supply pipe 7, the air supply pipe 7 is communicated with a circulating fan 9, and the circulating fan 9 is used for blowing external air into the air supply pipe 7 and discharging the external air from the air inlet holes 8 to provide oxygen for combustion of the coal seam 3 on the grate 2, so as to ensure sufficient combustion of the.
The inner wall of the boiler body 1 at the upper side of the fire grate 2 is also provided with combustion-supporting air pipes 11, the combustion-supporting air pipes 11 are annularly distributed at the outer side of the coal seam 3, the combustion-supporting air pipes 11 are provided with a plurality of exhaust holes, the combustion-supporting air pipes 11 are communicated with a flue gas circulating pipe 10, the flue gas circulating pipe 10 is provided with a circulating fan 9, a gas collecting chimney 25 is arranged at the top of the boiler body 1, the flue gas circulating pipe 10 is communicated with the gas collecting chimney 25, after the circulating fan 9 is started, a part of the flue gas in the gas collecting chimney 25 can be blown into the combustion chamber 12 through the flue gas circulating pipe 10 to participate in the combustion of the coal seam 3 again and support combustion, wherein, a plurality of exhaust holes on the combustion-supporting air pipe 11 are arranged towards the coal seam 3 and have a certain inclination angle, so that when the flue gas is exhausted from the exhaust holes, swirl forms in the combustion chamber 12 and enables the flame burning the coal seam 3 to burn upwards from the swirl, thereby reducing the amount of heat directly heating and radiating the boiler body 1.
Referring to fig. 1, 2, 3 and 6, a water tank 13 is installed in a combustion chamber 12 right above a fire grate 2, a heat exchange water pipe 14 contacting with flame in the combustion chamber 12 is arranged in the middle of the water tank 13, the heat exchange water pipe 14 is communicated with the inside of the water tank 13, the top of the heat exchange water pipe 14 is communicated with a distributor 15, the distributor 15 is communicated with a water supplementing tank 17 through a constant-pressure water supplementing assembly 16, the water supplementing tank 17 is positioned at the top of a boiler body 1, a flue gas heat exchange pipe 24 penetrates through the inside of the water supplementing tank 17, the bottom of the flue gas heat exchange pipe 24 is communicated with the combustion chamber 12 through a flue gas discharge pipe 23, and the top of.
The working principle of the invention is as follows:
when swirl combustion supporting of flue gas recirculation is carried out, firstly, a coal bed 3 is placed on a fire grate 2, after the coal bed 3 is ignited, external air is blown into an air supply pipe 7 by an air blower 5 and is output to the lower part of the fire grate 2 through an air inlet hole 8 to support combustion of the coal bed 3 burning on the fire grate 2, burning flame is added into a heat exchange water pipe 14, a water replenishing tank 17 flows into a distributor 15, water after heat exchange is carried out through the heat exchange water pipe 14 is heated, hot water is collected in a water tank 13, the burned flue gas is discharged from a gas collecting chimney 25 through a flue gas discharge pipe 23 and a flue gas heat exchange pipe 24, whether a circulating fan 9 is started or not is selected according to the ratio of combustible substances in the flue gas, when the circulating fan 9 is started, part of the flue gas flows into a combustion supporting air pipe 11 along a flue gas circulating pipe 10 and enters a combustion chamber 12 to support combustion of the coal bed 3, the flame of the coal bed 3, the heat utilization efficiency is high.
Example 2
Referring to fig. 1 and 2, the flue gas recirculation cyclone combustion-supporting boiler according to embodiment 1 includes a boiler body 1, a combustion furnace 4 is disposed inside the boiler body 1, a grate 2 is laid at the bottom of the combustion furnace 4, a coal seam 3 is disposed above the grate 2, a combustion-supporting air duct 11 is further mounted on an inner wall of the boiler body 1 on the upper side of the grate 2, the combustion-supporting air duct 11 is annularly distributed on the outer side of the coal seam 3, a plurality of exhaust holes are disposed on the combustion-supporting air duct 11, the combustion-supporting air duct 11 is communicated with a flue gas circulation duct 10, a circulation fan 9 is mounted on the flue gas circulation duct 10, a gas collection chimney 25 is mounted on the top of the boiler body 1, and.
Different from the embodiment 1, referring to fig. 1 and 5, an air suction valve 26 is installed at the connection position of the flue gas circulation pipe 10 and the gas collection chimney 25, the air suction valve 26 is composed of a valve plate 27 and a pin shaft 28, the valve plate 27 is hinged on the inner wall of the gas collection chimney 25 through the pin shaft 28, the valve plate 27 is located at the pipe orifice of the flue gas circulation pipe 10, when the circulation fan 9 is started, the negative pressure in the flue gas circulation pipe 10 drives the valve plate 27 to rotate around the pin shaft 28, so that air in the gas collection chimney 25 enters the flue gas circulation pipe 10, and flue gas recirculation is achieved.
Referring to fig. 1, 2 and 4, the constant pressure water supplement assembly 16 includes a water supplement channel 19 and a constant pressure water supplement valve 18 installed in the water supplement channel 19, wherein the top of the water supplement channel 19 is communicated with a water supplement tank 17, the bottom of the water supplement channel 19 is communicated with a distributor 15, the water supplement tank 17 is communicated with a water injection pipe, the water tank 13 is provided with a water outlet pipe, when water in the water tank 13 is output from the water outlet pipe for use, the pressure in the water tank 13 becomes smaller, the pressure difference between the water supplement tank 17 and the water tank 13 becomes larger until the constant pressure water supplement valve 18 is automatically opened, and the water in the water supplement tank 17 is supplemented into the water tank 13.
Further, constant voltage water supply valve 18 includes moisturizing ball valve core 20, moisturizing spring 21 and moisturizing fixing base 22, moisturizing fixing base 22 is fixed in 19 bottoms of moisturizing passageway, and moisturizing ball valve core 20 installs moisturizing spring 21 for spherical structure and between moisturizing ball valve core 20 and the moisturizing fixing base 22, the reducing mouth department at 19 middle parts of moisturizing passageway of moisturizing ball valve core 20 shutoff, when pressure differential is greater than moisturizing spring 21 elasticity between moisturizing box 17 and the water tank 13, moisturizing ball valve core 20 is backed down, and at this moment, moisturizing box 17 is linked together through moisturizing passageway 19 with water tank 13, and the moisturizing box 17 water-logging of being convenient for is supplied into in the water tank 13, guarantees that the water in the water tank 13 is in high liquid level all the time, avoids dry combustion method.
The flue gas heat exchange tube 24 is of a zigzag or spiral structure and is positioned in the water replenishing tank 17 and used for absorbing heat in high-heat flue gas discharged from the combustion chamber 12 by using cold water in the water replenishing tank 17 to preheat cold water, so that the heat utilization efficiency is improved.
The technical principle of the present invention has been described above with reference to specific embodiments, which are merely preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. Other embodiments of the invention will occur to those skilled in the art without the exercise of inventive faculty, and such will fall within the scope of the invention.
Claims (8)
1. A swirl combustion-supporting boiler with flue gas recirculation comprises a boiler body (1), wherein a combustion furnace (4) is arranged inside the boiler body (1), a grate (2) is laid at the bottom of the combustion furnace (4), a coal bed (3) is arranged above the grate (2), a combustion chamber (12) is arranged in the combustion furnace (4) above the grate (2), and the boiler is characterized in that an air supply pipe (7) is arranged below the grate (2), a combustion-supporting air pipe (11) is also arranged on the inner wall of the boiler body (1) at the upper side of the grate (2), the combustion-supporting air pipe (11) is communicated with a flue gas circulating pipe (10), the flue gas circulating pipe (10) is communicated with a gas collecting chimney (25), the gas collecting chimney (25) is arranged at the top of the boiler body (1), a water tank (13) is arranged in the combustion chamber (12) right above the grate (2), and the water tank, heat exchange water pipe (14) intercommunication distributor (15), distributor (15) are through constant voltage moisturizing subassembly (16) intercommunication moisturizing case (17), and moisturizing case (17) are inside to wear to be equipped with flue gas heat exchange tube (24), and flue gas heat exchange tube (24) bottom is through flue gas discharge pipe (23) intercommunication combustion chamber (12), flue gas heat exchange tube (24) top intercommunication gas collection chimney (25).
2. The flue gas recirculation cyclone combustion-supporting boiler according to claim 1, wherein the boiler body (1) on the upper side of the grate (2) is provided with a boiler port, and the boiler port is provided with a boiler door.
3. The cyclone combustion-supporting boiler with flue gas recirculation according to claim 1, wherein a plurality of air inlet holes (8) are formed in the air supply pipe (7), the air supply pipe (7) is communicated with the circulating fan (9), the circulating fan (9) is installed on the flue gas circulating pipe (10), the combustion-supporting air pipes (11) are annularly distributed on the outer side of the coal seam (3), and a plurality of exhaust holes are formed in the combustion-supporting air pipes (11).
4. A cyclone combustion-supporting boiler with flue gas recirculation according to claim 3, characterized in that the middle of the water tank (13) is provided with a heat exchange water pipe (14) contacting with the flame in the combustion chamber (12), and the water replenishing tank (17) is positioned at the top of the boiler body (1).
5. The flue gas recirculation cyclone combustion-supporting boiler according to claim 1, wherein a gas suction valve (26) is installed at the connection of the flue gas circulation pipe (10) and the gas collection chimney (25), the gas suction valve (26) is composed of a valve plate (27) and a pin shaft (28), the valve plate (27) is hinged on the inner wall of the gas collection chimney (25) through the pin shaft (28), and the valve plate (27) is located at the pipe opening of the flue gas circulation pipe (10).
6. The flue gas recirculation cyclone combustion-supporting boiler according to claim 1, wherein the constant pressure water supplement assembly (16) comprises a water supplement channel (19) and a constant pressure water supplement valve (18) installed in the water supplement channel (19), the top of the water supplement channel (19) is communicated with a water supplement tank (17), the bottom of the water supplement channel (19) is communicated with a distributor (15), the water supplement tank (17) is communicated with a water injection pipe, and a water outlet pipe is installed on the water tank (13).
7. The cyclone combustion-supporting boiler with flue gas recirculation according to claim 6, wherein the constant-pressure water replenishing valve (18) comprises a water replenishing ball valve core (20), a water replenishing spring (21) and a water replenishing fixing seat (22), the water replenishing fixing seat (22) is fixed at the bottom of the water replenishing channel (19), the water replenishing ball valve core (20) is of a spherical structure, the water replenishing spring (21) is installed between the water replenishing ball valve core (20) and the water replenishing fixing seat (22), and the water replenishing ball valve core (20) is plugged at a variable diameter opening in the middle of the water replenishing channel (19).
8. A flue gas recirculation cyclone comburent boiler according to claim 1, characterized in that said flue gas heat exchange tubes (24) have a zigzag or spiral structure and are located inside the makeup tank (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110152369.4A CN112963826A (en) | 2021-02-03 | 2021-02-03 | Cyclone combustion-supporting boiler with flue gas recirculation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110152369.4A CN112963826A (en) | 2021-02-03 | 2021-02-03 | Cyclone combustion-supporting boiler with flue gas recirculation |
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| CN112963826A true CN112963826A (en) | 2021-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110152369.4A Pending CN112963826A (en) | 2021-02-03 | 2021-02-03 | Cyclone combustion-supporting boiler with flue gas recirculation |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2720324Y (en) * | 2004-07-22 | 2005-08-24 | 吴兴东 | Small coal-burning boiler |
| CN201717741U (en) * | 2010-07-15 | 2011-01-19 | 江门市瑞荣泵业有限公司 | Automatic water replenishing device of shield electric machine |
| CN202024410U (en) * | 2010-12-10 | 2011-11-02 | 刘万岭 | Automatic water-stealing prevention combiner for indoor heating |
| CN206347733U (en) * | 2016-07-04 | 2017-07-21 | 哈尔滨理工大学 | The sufficient safety-type hot-water boiler of one kind burning |
| CN110806005A (en) * | 2019-10-09 | 2020-02-18 | 长沙市天珍科技有限公司 | Environment-friendly staged combustion boiler |
-
2021
- 2021-02-03 CN CN202110152369.4A patent/CN112963826A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2720324Y (en) * | 2004-07-22 | 2005-08-24 | 吴兴东 | Small coal-burning boiler |
| CN201717741U (en) * | 2010-07-15 | 2011-01-19 | 江门市瑞荣泵业有限公司 | Automatic water replenishing device of shield electric machine |
| CN202024410U (en) * | 2010-12-10 | 2011-11-02 | 刘万岭 | Automatic water-stealing prevention combiner for indoor heating |
| CN206347733U (en) * | 2016-07-04 | 2017-07-21 | 哈尔滨理工大学 | The sufficient safety-type hot-water boiler of one kind burning |
| CN110806005A (en) * | 2019-10-09 | 2020-02-18 | 长沙市天珍科技有限公司 | Environment-friendly staged combustion boiler |
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Application publication date: 20210615 |