Novel fire tube type steam generator

Abstract

The utility model discloses a novel fire tube type steam generator which comprises a coil base, a furnace body arranged on one side of the top of the coil base, a fire tail waste heat recoverer arranged on the other side of the top of the coil base, a hearth arranged at the bottom of the coil base, an installation table arranged on one side of the coil base, a feeding hopper arranged on the top of the installation table, and a discharging pipe arranged at the bottom of the feeding hopper. A square fire tube is arranged in the furnace body, a round recovery fire tube is arranged in the fire tail waste heat recoverer, a steam box is arranged at the top of the furnace body, a steam guide tube communicated with the steam box is arranged at the top of the furnace body, and a dredging tube facilitating communication of the square fire tube and the round recovery fire tube is arranged at the top of one side of the furnace body. According to the novel fire tube type steam generator, the powerful stable gas production effect is achieved under the continuous impact of high-temperature flames in a hearth, the steam efficiency is improved, and combustion materials are saved.

Description

Technical Field

[0001] This utility model relates to the field of steam generators, specifically a novel fire-tube steam generator. Background Technology

[0002] A steam generator, also called a steam heat source machine (commonly known as a boiler), is a mechanical device that uses the heat energy of fuel or other energy sources to heat water into hot water or steam. The original meaning of "boiler" refers to a water-filled container heated over a fire, while "furnace" refers to the place where fuel is burned. A boiler consists of both the boiler and the furnace. Currently, steam generators that do not require annual inspection are generally limited to 30 liters of water and a pressure of 1 kg or 7 kg. However, achieving a stable pressure of 1 kg for a true 30-liter water capacity is very difficult. Most manufacturers use a practice of overstating capacity. The capacity is often several times greater than advertised. A large capacity requires a large size to accommodate the high heat transfer area, which, while ensuring stable steam operation, wastes materials and increases manufacturing costs. The steam efficiency is also lower and less energy-efficient. A true 30-liter water steam boiler is too small; the flame's heat conduction is insufficient, rendering it practically useless. Therefore, the industry now almost universally uses this practice of understating capacity. Boilers with a capacity of several hundred kilograms of water are labeled as only 29 liters to avoid inspection, and only 30 liters of water are released during inspections. Utility Model Content

[0003] The purpose of this invention is to provide a novel fire-tube steam generator to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A novel fire-tube steam generator includes a furnace platform, a furnace body on one side of the top of the furnace platform, a waste heat recovery unit on the other side of the top of the furnace platform, a furnace chamber at the bottom of the furnace platform, an installation platform on one side of the furnace platform, a feeding hopper at the top of the installation platform, a discharge pipe at the bottom of the feeding hopper, a square fire tube inside the furnace body, a circular recovery fire tube inside the waste heat recovery unit, a steam box at the top of the furnace body, and a connection between the top of the furnace body and the steam box. The furnace body has a steam duct, and a drainage duct is provided on the top of one side to facilitate the connection between the square fire tube and the circular recovery fire tube. The bottom of the tail waste heat recovery unit is provided with a tail flue gas output pipe that connects to the circular recovery fire tube. A cooling water pipe is provided on one side of the bottom of the tail waste heat recovery unit. A drainage duct is provided on the top of one side of the tail waste heat recovery unit. A treatment shell is installed at one end of the tail flue gas output pipe. A filter screen is snapped into one side of the inside of the treatment shell, and a PP filter cotton screen is snapped into the other side of the inside of the treatment shell. An activated carbon mesh frame is snapped into the side of the inside of the treatment shell near the filter screen.

[0005] Preferably, the feeding pipe extends into the furnace chamber, the furnace chamber is provided with an insulating outer body, the outer side of the insulating outer body is provided with a hot air box, the outer side of the furnace chamber is provided with an insulation layer, the corners of the insulating outer body are provided with air inlet pipes, one end of the air inlet pipe is provided with a rectangular air outlet, the top of the outer side of the furnace body is provided with a controller, and the bottom of one side of the furnace platform is provided with an induced draft fan.

[0006] Preferably, the top of the steam box is provided with a conveying pipe, a thermometer is installed on one side of the conveying pipe, and an electronic pressure gauge is installed on the other side of the conveying pipe. The thermometer is used to check the steam temperature, and the electronic pressure gauge is used to check the steam pressure.

[0007] Preferably, the height of the tail heat recovery device is greater than the height of the furnace body, and a water inlet pipe is provided on one side of the tail heat recovery device. The water inlet pipe is connected to the top of the furnace body. The bottom of the feeding pipe extends to the inner side of the insulation outer body, and a distributor is provided at the bottom of the inner wall of the feeding pipe to facilitate the even distribution of fuel. A blower pipe is provided at the bottom of one side of the furnace.

[0008] Preferably, the tail gas outlet pipe is connected to the circular recovery fire pipe, and a safety valve is provided at the top of the tail waste heat recovery device. The tail gas outlet pipe is used to discharge the cooled flue gas inside the circular recovery fire pipe.

[0009] Preferably, the activated carbon mesh frame is filled with activated carbon, and a side cover is provided on one side of the feed pipe. The side cover facilitates the disassembly, cleaning, and maintenance of the filter screen, PP filter cotton screen, and activated carbon mesh frame inside the processing shell.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] During operation, the hot air from the top of the square fire tube is discharged into the circular recovery fire tube inside the tail waste heat recovery unit. It then passes from the top through the extended circular recovery fire tube to the bottom and exits through the tail flue gas output pipe. Cold water is replenished from the bottom up through the tail waste heat recovery unit and enters the furnace body through the water inlet pipe. By cleverly utilizing the waste heat recovery unit, cold water enters at a low level and hot water exits at a high level, ensuring stable steam temperature measurement even when water is added. This achieves the condition of no temperature drop when adding water, resulting in very stable and beneficial gas production. The water replenishment process does not affect steam production. By adding tail waste heat, the flame flue gas is diverted further, and the steam generator does not cool down when replenishing water. Under the continuous impact of the high-temperature flame in the furnace, a strong and stable gas production effect is achieved, improving steam efficiency, saving combustion materials, and the gas is filtered by the filter screen and PP filter cotton screen when passing through the treatment shell. It is then adsorbed and purified by the activated carbon mesh frame, reducing the damage of particulate matter in the flue gas to the fan and extending the service life of the equipment.

[0012] Furthermore, the furnace body is filled with square fire tubes combined with triangular tubes. The gaps between the square tubes can be controlled evenly, thus controlling the space occupied by water. The combination of square fire tubes and a cylindrical outer body solves a problem in the industry. Since the fire tube is a tube in which fire runs inside and water runs outside, the distance between multiple fire tubes is composed of square tubes, which can be adjusted arbitrarily to control the water capacity. Moreover, the surface area of ​​the square fire tubes can be increased to no more than 30 liters of water. The heat conduction area can be increased several times compared with the round tubes, thus easily solving the problem of water capacity. That is, by configuring a large number of fire tubes and appropriately adjusting the gaps between the square tubes, the water capacity in the boiler can be easily controlled. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a top sectional view of the furnace body and the waste heat recovery device at the tail of the fire in this utility model;

[0015] Figure 3 This is a structural diagram of the inner wall of the furnace chamber of this utility model;

[0016] Figure 4 This is a structural diagram showing the connection between the furnace chamber and the feeding pipe of this utility model;

[0017] Figure 5 This is a structural diagram of the processing shell of this utility model.

[0018] In the diagram: 1. Furnace platform; 2. Furnace chamber; 3. Furnace body; 4. Mounting platform; 5. Feed hopper; 6. Feed pipe; 7. Square fire tube; 8. Waste heat recovery unit; 9. Circular recovery fire tube; 10. Steam box; 11. Steam duct; 12. Conveying pipe; 13. Thermometer; 14. Electronic pressure gauge; 15. Waste gas outlet pipe; 16. Processing shell; 17. Drainage duct; 18. Water inlet pipe; 19. Cooling water supply pipe; 20. Insulation outer body; 21. Hot air box; 22. Insulation layer; 23. Distributor; 24. Blower pipe; 25. Filter screen; 26. PP filter cotton screen; 27. Activated carbon mesh frame; 28. Side cover; 29. ​​Air inlet pipe; 30. Rectangular air outlet; 31. Controller; 32. Exhaust fan. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-5This utility model provides a novel fire-tube steam generator, including a furnace platform 1, a furnace body 3 on one side of the top of the furnace platform 1, a tail-end waste heat recovery unit 8 on the other side of the top of the furnace platform 1, a furnace chamber 2 at the bottom of the furnace platform 1, an installation platform 4 on one side of the furnace platform 1, a feeding hopper 5 on the top of the installation platform 4, a discharge pipe 6 at the bottom of the feeding hopper 5, square fire tubes 7 inside the furnace body 3, circular recovery fire tubes 9 inside the tail-end waste heat recovery unit 8, a steam box 10 on the top of the furnace body 3, a steam conduit 11 connected to the steam box 10 on the top of the furnace body 3, and a section on the top of one side of the furnace body 3 to facilitate the connection between the square fire tubes 7 and the circular recovery fire tubes 9. Pipe 9 is connected to the drain pipe 17. The bottom of the tail gas waste heat recovery unit 8 is provided with a tail gas output pipe 15 connected to the circular recovery fire pipe 9. A cooling water pipe 19 is provided on one side of the bottom of the tail gas waste heat recovery unit 8. A drain pipe 17 is provided on the top of one side of the tail gas waste heat recovery unit 8. A treatment shell 16 is installed at one end of the tail gas output pipe 15. A filter screen 25 is snapped into one side of the inside of the treatment shell 16. A PP filter cotton screen 26 is snapped into the other side of the inside of the treatment shell 16. An activated carbon mesh frame 27 is snapped into the side of the inside of the treatment shell 16 near the filter screen 25. The inside of the activated carbon mesh frame 27 is filled with activated carbon. A side cover 28 is provided on one side of the feed pipe 6.

[0021] The feeding pipe 6 is connected to an external feeder. A controller 31 is installed on the top of the outer side of the furnace body 3, and an induced draft fan 32 is installed at the bottom of one side of the furnace platform 1. The controller 31 has control functions. It can automatically reduce the feeding when there is overpressure and shut down the whole machine for protection when there is a lack of water. The feeding speed and the oxygen supply of the fan can be adjusted according to the set requirements and follow the command of the controller 31.

[0022] In this embodiment, square fire tubes 7 are used in combination with triangular tubes to fill the interior of the furnace body 3. The gaps between the square tubes can be controlled evenly, thus controlling the space occupied by water. This is something that cannot be done between traditional round tubes, nor can the water space be created. Water flowing outside the fire tubes naturally bears pressure into the tubes, and the use of smaller square tubes makes the pressure resistance better. Although round tubes are much more pressure resistant than square tubes, they cannot be close together, inevitably resulting in triangular gaps. Therefore, the use of square tubes provides greater control over the water space.

[0023] In this embodiment, the water volume inside the furnace body 3 is 30 liters. The square tube inside the outer circle is wrapped around the outer inner tube, which is the square fire tube 7. The inner wall of the furnace body 3 is filled with triangular tubes. The square fire tubes 7 are mainly distributed in the middle position, which effectively controls the spacing between the fire tubes to maximize the use of firepower and effectively controls the water storage capacity. The inner square tube structure is outer circle, and the four corners of the inner square and outer circle are filled with triangles, which makes the combination relatively stable.

[0024] In this embodiment, the burning material enters the furnace 2 through the feed hopper 5 and the discharge pipe 6 for ignition and combustion. The insulation outer body 20 is located outside the combustion chamber of the furnace 2 and is made of refractory cement and refractory sand. During use, under the action of the blower, air is blown into the combustion chamber through the blower pipe 24. The space under the furnace bridge is connected to the hot air box 21 around the insulation outer body 20, so that high-temperature oxygen is continuously supplied to the combustion under the drive of the blower. The high-temperature flue gas generated by the combustion in the furnace 2 will enter the square fire tube 7 and enter the furnace body 3 along the square fire tube 7.

[0025] See Figure 1-5 The feeding pipe 6 extends into the interior of the furnace chamber 2. The interior of the furnace chamber 2 is equipped with an insulation outer body 20. The outer side of the insulation outer body 20 is equipped with a hot air box 21. The outer side of the furnace chamber 2 is equipped with an insulation layer 22. The top of the steam box 10 is equipped with a conveying pipe 12. A thermometer 13 is installed on one side of the conveying pipe 12, and an electronic pressure gauge 14 is installed on the other side of the conveying pipe 12. The height of the tail waste heat recovery device 8 is greater than the height of the furnace body 3, and a water inlet pipe 18 is provided on one side of the tail waste heat recovery device 8. The water inlet pipe 18 is connected to the top of the furnace body 3. Air inlet pipes 29 are provided at the corners of the insulation outer body 20. A rectangular air outlet 30 is provided at one end of the air inlet pipe 29. The furnace bridge of the furnace chamber 2 is perforated. The perforation is to allow air to enter from the bottom during combustion so that the fuel can jump slightly to achieve a more uniform mixing of fire and material.

[0026] In this embodiment, a large amount of high-temperature flames and flue gas enter the furnace body 3 through the square fire tubes 7. Due to the presence of multiple square fire tubes 7, the water inside the furnace body 3 will be very thin. Under the heating effect of the square fire tubes 7, the thin water layer outside the tubes is quickly boiled to generate steam, which enters the steam box 10 through the steam pipe 11, and is then transported to the outside through the steam box 10 and the conveying pipe 12.

[0027] See Figure 1-5 The bottom of the feed pipe 6 extends to the inside of the insulation outer body 20, and the bottom of the inner wall of the feed pipe 6 is provided with a distributor 23 to facilitate the even distribution of fuel. A blower pipe 24 is provided at the bottom of one side of the furnace 2. The tail flue gas output pipe 15 is connected to the circular recovery fire pipe 9. A safety valve is provided at the top of the tail waste heat recovery device 8.

[0028] In this embodiment, a high-temperature combustion environment is created inside the furnace 2, allowing the flame temperature to reach 1200 degrees Celsius. The width of the furnace corner gap, the size of the ventilation opening, and the feed rate controlled by the distributor 23 are all utilized. An external blower supplies oxygen to aid combustion, and the spiral feeder adjusts the feed rate as needed. The feed is dispersed by the distributor 23 upon entering the furnace, allowing for more complete combustion. Hot air recirculates around the furnace 2 to aid combustion, forming a larger flame. The distributor 23 is designed to ensure better and more uniform combustion within the furnace 2, resulting in greater and higher efficiency.

[0029] In this embodiment, the hot air from the top of the square fire tube 7 is discharged into the circular recovery fire tube 9 inside the tail waste heat recovery unit 8, and exits from the top through the extended circular recovery fire tube 9 to the bottom. The bottom of the tail waste heat recovery unit 8 is almost entirely filled with low-temperature cold water, which greatly increases the heat conduction area and effectively reduces the exhaust temperature. At the same time, the high-temperature flue gas flows downward into the circular recovery fire tube 9 and is discharged from the bottom. The required cold water is supplied from the tail waste heat recovery unit 8 from the bottom up. It is continuously heated by the hot air flow in the circular recovery fire tube 9, and becomes almost boiling water when it reaches the top. Then it enters the furnace body 3 through the water inlet pipe 18, achieving the condition of adding water without cooling. In this embodiment, the waste heat recovery unit cleverly uses cold water to enter at the low position and hot water to exit at the high position. The flue gas is discharged into the atmosphere from the cold water at the low position, ensuring the stability of steam temperature measurement even when adding water.

[0030] In practical use, this novel fire-tube steam generator of the present invention allows the material to be burned to enter the furnace 2 through the feed hopper 5 and the discharge pipe 6 for ignition and combustion. The insulating outer body 20 is located outside the combustion chamber of the furnace 2 and is made of refractory cement and refractory sand. During use, under the action of a blower, air is blown into the combustion chamber through the blower pipe 24. The space under the furnace bridge is connected to the hot air box 21 around the insulating outer body 20, continuously supplying high-temperature oxygen to the combustion chamber under the drive of the blower. The combustion in the furnace 2 generates... The high-temperature flue gas enters the interior of the square fire tube 7 and then flows into the furnace body 3. Multiple square fire tubes 7 form the inner liner, and multiple inner liners can be installed. A large amount of high-temperature flame and flue gas enter the interior of the furnace body 3 through the square fire tubes 7. Due to the presence of multiple square fire tubes 7, the water layer inside the furnace body 3 is very thin. Under the heating effect of the square fire tubes 7, the thin water layer outside the tubes is rapidly boiled to generate steam, which enters the steam box 10 through the steam pipe 11, and then is transported to the outside through the steam box 10 and the conveying pipe 12. The hot air at the top of the square fire tubes 7... The exhaust gas flows into the circular recovery tube 9 inside the waste heat recovery unit 8, extending from the top to the bottom. The bottom of the waste heat recovery unit 8 is almost entirely filled with low-temperature cold water, significantly increasing the heat transfer area and effectively reducing the exhaust temperature. Simultaneously, the high-temperature flue gas flows downwards into the circular recovery tube 9 and exits from the bottom. The required makeup water is supplied from the bottom up to the waste heat recovery unit 8, continuously heated by the hot airflow within the circular recovery tube 9, reaching almost boiling water at the top, and then entering the system through the inlet pipe 18. Inside the furnace body 3, the condition of adding water without cooling is achieved, making the gas production very stable and powerful. The water replenishment process does not affect the steam production. The flue gas flows from the top to the bottom of the tail waste heat recovery unit 8 and passes through the cold water driven by the external fan. The flue gas temperature has been greatly reduced. This saves fuel and does not damage the fan. When passing through the treatment shell 16, it is filtered by the filter screen 25 and PP filter cotton screen 26. It is then adsorbed and purified by the activated carbon mesh frame 27, reducing the damage of particulate matter in the flue gas to the fan and extending the service life of the equipment.

[0031] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A new type of fire tube steam generator comprising a furnace base (1) characterized in that: The top of the furnace table (1) is provided with a furnace body (3), the other side of the top of the furnace table (1) is provided with a fire tail heat recovery device (8), the bottom of the furnace table (1) is provided with a hearth (2), one side of the furnace table (1) is provided with a mounting table (4), the top of the mounting table (4) is provided with an inlet hopper (5), the bottom of the inlet hopper (5) is provided with a discharging pipe (6), the inside of the furnace body (3) is provided with a square fire tube (7), the inside of the fire tail heat recovery device (8) is provided with a circular recovery fire tube (9), the top of the furnace body (3) is provided with a steam box (10), the top of the furnace body (3) is provided with a steam guide pipe (11) in communication with the steam box (10), the top of one side of the furnace body (3) is provided with a dredging pipe (17) for facilitating the communication of the square fire tube (7) and the circular recovery fire tube (9), the bottom of the fire tail heat recovery device (8) is provided with a fire tail flue gas output pipe (15) in communication with the circular recovery fire tube (9), one side of the bottom of the fire tail heat recovery device (8) is provided with a cold water supplement pipe (19), the top of one side of the fire tail heat recovery device (8) is provided with a dredging pipe (17), one end of the fire tail flue gas output pipe (15) is provided with a treatment shell (16), one side of the inside of the treatment shell (16) is clamped with a filter screen (25), the other side of the inside of the treatment shell (16) is clamped with a pp filter cotton screen (26), one side of the inside of the treatment shell (16) close to the filter screen (25) is clamped with an activated carbon screen frame (27).

2. A novel fire-tube steam generator as claimed in claim 1, wherein: The discharging pipe (6) extends to the inside of the hearth (2), the inside of the hearth (2) is provided with a heat preservation outer body (20), the outside of the heat preservation outer body (20) is provided with a hot air box (21), the outside of the hearth (2) is provided with a heat preservation layer (22), the corners of the heat preservation outer body (20) are all provided with air inlet pipes (29), one end of the air inlet pipe (29) is provided with a rectangular air inlet (30), the top of the outside of the furnace body (3) is provided with a controller (31), the bottom of one side of the furnace table (1) is provided with an induced draft fan (32).

3. A novel fire-tube steam generator as claimed in claim 1, wherein: The top of the steam box (10) is provided with a conveying pipe (12), one side of the conveying pipe (12) is provided with a temperature table (13), the other side of the conveying pipe (12) is provided with an electronic pressure table (14).

4. A novel fire-tube steam generator as claimed in claim 1, wherein: The height of the fire tail heat recovery device (8) is greater than the height of the furnace body (3), and one side of the fire tail heat recovery device (8) is provided with a water inlet pipe (18) in communication with the top of the furnace body (3).

5. A novel fire-tube steam generator as claimed in claim 1, wherein: The bottom of the discharging pipe (6) extends to the inside of the heat preservation outer body (20), and the bottom of the inner wall of the discharging pipe (6) is provided with a material distributor (23) for uniformly distributing the fuel, and the bottom of one side of the hearth (2) is provided with an air blowing pipe (24).

6. A novel fire-tube steam generator as claimed in claim 1, wherein: The fire tail flue gas output pipe (15) is in communication with the circular recovery fire tube (9), and the top of the fire tail heat recovery device (8) is provided with a safety valve.

7. A novel fire-tube steam generator as claimed in claim 1, wherein: The inside of the activated carbon screen frame (27) is filled with activated carbon, and one side of the discharging pipe (6) is provided with a side cover (28).

Images