Water-cooled combustion novel direct-flow non-inspection evaporator and use method
By designing a new type of water-cooled combustion DC inspection-free evaporator, which uses rounded rectangular coils and a water-cooled burner, the safety hazards and high costs of existing inspection-free evaporators have been solved, achieving efficient, safe, and low-cost steam production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHANDONG PALAYTON BOILER MFG CO LTD
- Filing Date
- 2026-05-14
- Publication Date
- 2026-06-19
AI Technical Summary
Existing cross-flow and conventional DC inspection-free evaporators have problems such as safety hazards, poor performance, high manufacturing difficulty and high cost, especially in terms of combustion safety hazards and small evaporation space.
A novel water-cooled combustion DC evaporator without inspection was designed. It adopts a rounded rectangular coil structure and a water-cooled burner. The flue gas flows through the gaps between the coils. Combined with post-mixing combustion technology, air and gas are evenly mixed in the air mixer. The interior is filled with circulating cold water to avoid overheating damage.
It improves heat exchange efficiency, reduces the wall temperature of the combustion device, extends service life, reduces material requirements and manufacturing costs, avoids safety hazards, and improves safety and operating costs.
Smart Images
Figure CN122237013A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of evaporator technology and relates to a novel water-cooled combustion DC inspection-free evaporator and its usage method. Background Technology
[0002] Currently, the market competition for inspection-free steam generators is becoming increasingly fierce, so most boiler manufacturers have launched inspection-free evaporators, mainly cross-flow inspection-free evaporators and conventional direct-flow inspection-free evaporators.
[0003] While current cross-flow evaporators are simple in structure and low in cost, they all use post-mixing surface burners due to structural limitations. The gas and air are mixed at high speed in the blower, which poses certain safety hazards. In addition, they also have disadvantages such as extremely small evaporation space, serious water carryover in steam, high exhaust temperature, and large gas consumption.
[0004] Most conventional DC inspection-free evaporators currently available are either circular coil or serpentine tube structures. Circular coil DC inspection-free evaporators share the same combustion disadvantages as cross-flow inspection-free evaporators, all employing post-mixing surface burners, which pose certain safety risks. They also suffer from high manufacturing difficulty, high manufacturing costs, and the coils being prone to overheating and damage. Serpentine tube DC inspection-free evaporators, due to the bending radius limitation of the bends, have lower flue gas velocity, require more heating surfaces, and involve more welding, resulting in higher manufacturing difficulty and costs.
[0005] In summary, current cross-flow evaporators generally suffer from safety hazards, poor performance, and high operating costs, while conventional DC evaporators also have safety hazards, are generally difficult to manufacture, and are costly.
[0006] Therefore, developing a safe, high-performance, low-operating-cost, simple-to-manufacture, and low-price inspection-free evaporator is a very important topic in the field of inspection-free steam generators. Summary of the Invention
[0007] The purpose of this invention is to provide a novel water-cooled combustion DC evaporator that is free from inspection, in order to solve the problems mentioned in the background art.
[0008] To achieve the above objectives, the present invention provides the following technical solution: A novel water-cooled combustion DC-DC evaporator, exempt from inspection, includes a blower, a mixer, a water-cooled burner, an economizer, a condenser, a water tank, and a gas valve assembly. The water-cooled burner has a furnace at its bottom, and the furnace is connected to the mixer via piping. The mixer's inlet pipe is connected to the blower, and its outlet pipe is connected to the gas valve assembly. The water-cooled burner and condenser are connected via a connecting pipe. The economizer is sequentially connected via connecting pipe two, coil one, connecting pipe three, the furnace, connecting pipe four, coil two, connecting pipe five, coil three, connecting pipe six, and coil four. The water tank is connected to the condenser via a cold water pump, and to the economizer via a hot water pump.
[0009] In the above-mentioned water-cooled combustion novel DC inspection-free evaporator, the blower has an air inlet at its top, the air mixer has a gas inlet at its top, the condenser has a flue gas outlet at its rear end, the condenser has a cold water inlet at its top, the energy saver has a hot water inlet at its top, the coil has a steam outlet at its top, and the water-cooled burner has a cold water outlet at its top.
[0010] In the above-mentioned water-cooled combustion novel DC inspection-free evaporator, the first coil and the second coil are made of bent plain steel pipes, and the plain steel pipes of the first coil and the second coil can be either rounded rectangular steel pipes or round steel pipes.
[0011] In the aforementioned water-cooled combustion novel DC inspection-free evaporator, coils three and four are made of bent finned steel tubes.
[0012] In the aforementioned water-cooled combustion novel DC inspection-free evaporator, the furnace chamber is made of bent plain steel pipe and welded with flat steel.
[0013] In the aforementioned novel water-cooled combustion DC evaporator, the outer surface of the water-cooled burner consists of flame and flue gas, while the interior contains circulating cold water.
[0014] In the aforementioned water-cooled combustion novel DC inspection-free evaporator, the first coil and the second coil are coils bent into rounded rectangular shapes, and the flue gas passes through the gaps between the coils.
[0015] Another object of the present invention is to provide a method of using a novel water-cooled combustion DC evaporator that is free from inspection, comprising the following steps: S1: The cold water pump starts and sends cold water from the cold water inlet into the condenser. The water is then heated through connecting pipe 1 and the water-cooled burner, and flows out from the cold water outlet. Finally, it is stored in the water tank. S2: The hot water pump starts, draws hot water from the water tank, sends it into the energy-saving device through the hot water inlet, and then passes through connecting pipe 2, coil 1, connecting pipe 3, furnace, connecting pipe 4, coil 2, connecting pipe 5, coil 3, connecting pipe 6, and coil 4 in sequence, and is heated to form steam, which finally flows out from the steam outlet. S3: Air enters through the air inlet and is sent into the air mixer by the blower. At the same time, the gas is sent into the air mixer through the gas valve group. The air and gas mix inside the air mixer and, under the action of the blower, pass through the water-cooled burner and burn on its surface to form a flame. After the flame passes through the furnace, it becomes high-temperature flue gas, which then flows sequentially through coil one, coil two, coil three, coil four, economizer, and condenser, and finally flows out from the flue gas outlet. When the flame and flue gas flow through the furnace, coil one, coil two, coil three, coil four, economizer, and condenser, they simultaneously heat the medium inside, heating cold water into hot water and hot water into steam.
[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. A novel water-cooled combustion DC evaporator without inspection and its usage method, wherein coil one and coil two are bent into a rounded rectangular shape, so that flue gas passes through the gap between each coil of tubes. By adjusting the gap between each coil of tubes, a reasonable flue gas flow rate can be designed, which can improve the heat transfer coefficient, save water volume, and reduce costs.
[0017] 2. A novel water-cooled combustion DC evaporator without inspection and its usage method, wherein coils three and four, which have a high steam content in their tubes, are arranged in the middle area of the evaporator. The flue gas temperature in this area is 350-650℃, which can reduce the wall temperature of coils three and four, improve the safety of the DC boiler, extend its service life, and reduce material requirements.
[0018] 3. A novel water-cooled combustion DC evaporator without inspection and its usage method, which adopts a water-cooled burner, whose outer surface is flame and flue gas, and whose interior is circulating cold water, which can reduce the wall temperature of the combustion device and prevent deformation or damage due to overheating.
[0019] 4. A novel water-cooled combustion DC evaporator that is exempt from inspection and its usage method, which adopts post-mixing combustion technology, in which air and gas are uniformly mixed in the air mixer, thus avoiding the safety hazards caused by mixing inside the fan. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the external appearance of a novel water-cooled combustion DC evaporator that is exempt from inspection and its usage method according to the present invention.
[0021] Figure 2 This is a structural schematic diagram of a novel water-cooled combustion DC evaporator that is exempt from inspection and its usage method, according to the present invention.
[0022] Figure 3 This is a schematic diagram of the furnace structure of a novel water-cooled combustion DC evaporator and its usage method according to the present invention.
[0023] Figure 4 This is a schematic diagram of the structure of coil one and coil two of a novel water-cooled combustion DC evaporator and its usage method according to the present invention.
[0024] Figure 5 This is a schematic diagram of the structure of coil one and coil two and the flue gas flow direction of a novel water-cooled combustion DC inspection-free evaporator and its usage method according to the present invention.
[0025] Figure 6 This is a flowchart illustrating the principle of a novel water-cooled combustion DC evaporator that is exempt from inspection and its usage method, as described in this invention.
[0026] In the diagram: 1. Blower; 2. Air mixer; 3. Water-cooled burner; 4. Furnace; 5. Coil 1; 6. Coil 2; 7. Coil 3; 8. Coil 4; 9. Eco-friendly device; 10. Condenser; 11. Connecting pipe 1; 12. Connecting pipe 2; 13. Connecting pipe 3; 14. Connecting pipe 4; 15. Connecting pipe 5; 16. Connecting pipe 6; 17. Hot water pump; 18. Cold water pump; 19. Water tank; 20. Gas valve assembly; 21. Air inlet; 22. Gas inlet; 23. Steam outlet; 24. Flue gas outlet; 25. Hot water inlet; 26. Cold water inlet; 27. Cold water outlet. Detailed Implementation
[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0028] Please see Figure 1-6 This invention provides a technical solution for a novel water-cooled combustion DC evaporator that is inspection-free: according to Figure 1-6As shown, a novel water-cooled combustion DC evaporator without inspection includes a blower 1, a mixer 2, a water-cooled burner 3, an economizer 9, a condenser 10, a water tank 19, and a gas valve assembly 20. The bottom of the water-cooled burner 3 is equipped with a furnace 4, which is connected to the mixer 2 via piping. The air inlet pipe of the mixer 2 is connected to the blower 1, and the air outlet pipe of the mixer 2 is connected to the gas valve assembly 20. The water-cooled burner 3 and the condenser 10 are connected via connecting pipe 11. The economizer 9 is sequentially connected via connecting pipe 12, coil 5, connecting pipe 13, the furnace 4, connecting pipe 14, coil 6, connecting pipe 15, coil 7, connecting pipe 16, and coil 8. The water tank 19 is connected to the condenser 10 via a cold water pump 18, and to the economizer 9 via a hot water pump 17.
[0029] Specifically, by bending coil 5 and coil 6 into a rounded rectangular shape, flue gas passes through the gaps between the coil coils. This allows for the design of a reasonable flue gas flow rate by adjusting the gaps between the coil coils, thereby improving the heat transfer coefficient, saving water volume, and reducing costs. A water-cooled burner 3 is used, with its outer surface consisting of flame and flue gas, and its interior filled with circulating cold water. This reduces the wall temperature of the combustion device, preventing deformation and damage due to overheating.
[0030] according to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, this invention discloses a novel water-cooled combustion DC inspection-free evaporator. The blower 1 has an air inlet 21 at its top, the mixer 2 has a gas inlet 22 at its top, the condenser 10 has a flue gas outlet 24 at its rear end, the condenser 10 has a cold water inlet 26 at its top, the energy saver 9 has a hot water inlet 25 at its top, the coil 8 has a steam outlet 23 at its top, and the water-cooled burner 3 has a cold water outlet 27 at its top.
[0031] Coils 5 and 6 are made of bent plain steel tubes. These tubes can be either rounded rectangular steel tubes or round steel tubes. Coils 7 and 8 are made of bent finned steel tubes. The furnace chamber 4 is made of bent plain steel tubes welded with flat steel. The outer surface of the water-cooled burner 3 is for flame and flue gas, while the interior contains circulating cold water. Coils 5 and 6 are bent into rounded rectangular shapes, and the flue gas passes through the gaps between the coils.
[0032] like Figure 1-6 As shown, the working process of the novel water-cooled combustion DC evaporator of the present invention is as follows: Step 1: The cold water pump 18 starts and sends cold water from the cold water inlet 26 into the condenser 10. The water is then heated through the connecting pipe 11 and the water-cooled burner 3, and flows out from the cold water outlet 27. Finally, it is stored in the water tank 19. Step 2: The hot water pump 17 starts and draws hot water from the water tank 19. It is then sent into the energy-saving device 9 through the hot water inlet 25. The hot water then passes through the connecting pipe 2 12, coil 1 5, connecting pipe 3 13, furnace 4, connecting pipe 4 14, coil 2 6, connecting pipe 5 15, coil 3 7, connecting pipe 6 16, and coil 4 8 in sequence and is heated to form steam. Finally, the steam flows out from the steam outlet 23. Step 3: Air enters through air inlet 21 and is sent into the air mixer 2 by blower 1. At the same time, gas is sent into the air mixer 2 through gas valve group 20. The air and gas mix inside the air mixer 2 and pass through the water-cooled burner 3 under the action of blower 1, where they burn on the surface to form a flame. The flame passes through the furnace 4 and becomes high-temperature flue gas. Then, it flows through coil 1 5, coil 2 6, coil 3 7, coil 4 8, economizer 9, and condenser 10 in sequence, and finally flows out from the flue gas outlet 24. When the flame and flue gas flow through the furnace 4, coil 1 5, coil 2 6, coil 3 7, coil 4 8, economizer 9, and condenser 10, they simultaneously heat the medium inside, heating cold water into hot water and hot water into steam.
[0033] Contents not described in detail herein are existing technologies known to those skilled in the art. The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art can make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.
Claims
1. A novel water-cooled combustion DC evaporator, comprising a blower (1), a mixer (2), a water-cooled burner (3), an energy saver (9), a condenser (10), a water tank (19), and a gas valve assembly (20), characterized in that, The bottom of the water-cooled burner (3) is provided with a furnace (4). The furnace (4) is connected to a mixer (2) via a pipeline. The air inlet pipe of the air mixer (2) is connected to a blower (1), and the air outlet pipe of the air mixer (2) is connected to a gas valve group (20). The water-cooled burner (3) and the condenser (10) are connected by a connecting pipe (11); The energy saver (9) is connected in sequence to connecting pipe 2 (12), coil 1 (5), connecting pipe 3 (13), furnace (4), connecting pipe 4 (14), coil 2 (6), connecting pipe 5 (15), coil 3 (7), connecting pipe 6 (16), and coil 4 (8). The water tank (19) is connected to the condenser (10) via a cold water pump (18) and the water tank (19) is connected to the energy saver (9) via a hot water pump (17).
2. The novel water-cooled combustion DC evaporator without inspection according to claim 1, characterized in that: The blower (1) has an air inlet (21) at its top, the air mixer (2) has a gas inlet (22) at its top, the condenser (10) has a flue gas outlet (24) at its rear end, the condenser (10) has a cold water inlet (26) at its top, the energy saver (9) has a hot water inlet (25) at its top, the coil (8) has a steam outlet (23) at its top, and the water-cooled burner (3) has a cold water outlet (27) at its top.
3. The novel water-cooled combustion DC evaporator without inspection according to claim 1, characterized in that: The first coil (5) and the second coil (6) are made of bare steel pipes. The bare steel pipes of the first coil (5) and the second coil (6) can be either rounded rectangular steel pipes or round steel pipes.
4. The novel water-cooled combustion DC evaporator without inspection according to claim 1, characterized in that: The coils three (7) and four (8) are made of bent finned steel pipes.
5. A novel water-cooled combustion DC evaporator without inspection according to claim 1, characterized in that: The furnace chamber (4) is made of bent steel pipe and welded flat steel.
6. The novel water-cooled combustion DC evaporator without inspection according to claim 1, characterized in that: The water-cooled burner (3) has flame and flue gas on its outer surface and circulating cold water inside.
7. A novel water-cooled combustion DC evaporator without inspection according to claim 1, characterized in that: The first coil (5) and the second coil (6) are coils bent into a rounded rectangular shape, and the flue gas passes through the gap between each coil.
8. A method of using a novel water-cooled combustion DC evaporator that is inspection-free, characterized in that... The method applied to the novel water-cooled combustion DC evaporator without inspection as described in any one of claims 1-7 includes the following steps: S1: The cold water pump (18) starts and sends cold water from the cold water inlet (26) into the condenser (10), and then through the connecting pipe (11) and the water-cooled burner (3) to be heated, and then flows out from the cold water outlet (27) and is finally stored in the water tank (19). S2: The hot water pump (17) starts and draws hot water from the water tank (19), which is then sent into the energy-saving device (9) through the hot water inlet (25). The hot water then passes through the connecting pipe 2 (12), coil 1 (5), connecting pipe 3 (13), furnace (4), connecting pipe 4 (14), coil 2 (6), connecting pipe 5 (15), coil 3 (7), connecting pipe 6 (16), and coil 4 (8) and is heated to form steam. Finally, the steam flows out from the steam outlet (23). S3: Air enters through air inlet (21) and is sent into the mixer (2) by blower (1). At the same time, gas is sent into the mixer (2) through gas valve group (20). Air and gas mix inside the mixer (2) and pass through the water-cooled burner (3) under the action of blower (1) and burn on its surface to form a flame. After the flame passes through the furnace (4), it becomes high-temperature flue gas and then flows through coil one (5), coil two (6), coil three (7), coil four (8), energy saver (9), and condenser (10) in sequence. Finally, it flows out from the flue gas outlet (24). When the flame and flue gas flow through the furnace (4), coil one (5), coil two (6), coil three (7), coil four (8), energy saver (9), and condenser (10), the medium inside will be heated at the same time, so that cold water is heated into hot water and hot water is heated into steam.