Steam generator and furnace body thereof

Abstract

The invention provides a steam generator and a furnace body thereof, and belongs to the heat energy engineering technology. The technical problems that in the prior art, the heating efficiency is low, and the steam output amount and the output steam temperature are limited are solved. The furnace body comprises a box body, a hearth of the box body is internally provided with a steam passing generation pipeline in an axial spiral shape, the steam passing generation pipeline comprises a spiral section in an axial spiral shape, coil pipe units are further arranged at the two ends of the spiral section respectively, and each coil pipe unit comprises a plurality of coil pipe sections which are distributed in the axial direction and are in a radial spiral shape and hollow. An axial channel is formed in the center of the coil pipe section, a columnar combustion head is arranged on the inner side of the passing water vapor generating pipeline, flame distributed at the periphery of the columnar combustion head by 360 degrees acts on the spiral section and the coil pipe unit at at least one end, the columnar combustion head is connected with one end of the box body, and a smoke outlet is formed in the other end of the box body. The steam generator has the advantages of high heating efficiency, stable steam output efficiency, self-inspection design, safety mechanism and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of thermal energy engineering, and relates to a steam generating device, in particular to a steam generator and a furnace body thereof. Background Art

[0002] Steam generator is a mechanical device that uses the heat energy of fuel or other energy sources to heat water into steam. In the prior art, due to the limited heating efficiency, there is usually a problem that steam cannot be output in time when cold water is added. For this reason, people have conducted long-term exploration and proposed various solutions.

[0003] For example, a Chinese patent document discloses a steam generator [application number: 201210090109.X], which includes an evaporation box, a burner and a heat collecting tube installed above the burner, characterized in that: a tubular heat exchanger connected to a water inlet is installed in the heat collecting tube, the outlet of the tubular heat exchanger is connected to the evaporation box, and a plurality of copper balls are installed in the evaporation box; a heat pipe is installed above the tubular heat exchanger, and at least one part of the upper part of the heat pipe is located among the copper balls. It has the effect of continuously outputting steam when in use.

[0004] Although the above solution has the effect of continuously outputting steam, it does not fundamentally solve the problem of low heating efficiency. In addition, the output volume and temperature of the steam output are limited and cannot meet higher demands. Summary of the invention

[0005] The object of the present invention is to provide a steam generator with high heating efficiency, large steam output and high steam output temperature in view of the above problems.

[0006] Another object of the present invention is to provide a furnace body of a steam generator in view of the above problems.

[0007] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a furnace body, including a box body, a steam generation pipeline in an axial spiral shape is arranged in the furnace of the box body, the steam generation pipeline includes a spiral section in an axial spiral shape, and coil units are respectively arranged at both ends of the spiral tube, the coil unit includes a plurality of hollow coil sections in the radial spiral shape and distributed along the axial direction, an axial channel is arranged in the center of the coil section, a columnar burner is arranged on the inner side of the steam generation pipeline, and the flame distributed 360 degrees around the periphery of the columnar burner acts on the spiral section and the coil unit at at least one end, the columnar burner is connected to one end of the box body, and a smoke outlet is arranged on the other end of the box body.

[0008] By combining a columnar burner head with a flame distributed 360 degrees around the periphery and a steam generation pipeline that spirally surrounds the columnar burner head 360 degrees, the heated area of ​​the water can be greatly increased, thereby achieving the effect of increasing the heating efficiency.

[0009] A steam generator comprises a box body as claimed in claim 1, wherein the flue gas outlet is connected to a condenser, a preheating pipeline and a condensing pipeline are arranged on the condenser, the condensing pipeline is connected to a buffer water tank through a condensing circuit, the buffer water tank is coated with an insulation layer, the buffer water tank is connected to a main water tank, the water inlet of the steam generation pipeline is connected to the preheating pipeline, the preheating pipeline is connected to the buffer water tank through a water supply mechanism, and the steam outlet of the steam generation pipeline is connected to a steam-water separator.

[0010] By providing a preheating pipeline and a condensing pipeline in the condenser and connecting the flue gas outlet to the condenser, the preheating pipeline can be preheated and the condensing pipeline can be condensed in the condenser at the same time, thereby increasing the overall operating efficiency and reducing energy loss.

[0011] In the above steam generator, the steam-water separator is provided with a water content detector for detecting the water content in the steam, the steam outlet of the steam-water separator is provided with a steam control valve, and a drainage hole is provided at the bottom of the steam-water separator, and the drainage hole is connected to the buffer water tank through a steam trap. The water content detector is provided at the steam outlet to prevent the output of water-containing steam, which affects the quality of the output steam, and the drainage hole provided at the bottom of the steam-water separator and the connection with the buffer water tank through the steam trap can discharge the excess water in time, so as to avoid the accumulation of water in the steam-water separator and affect the steam output effect.

[0012] In the above-mentioned steam generator, the columnar burner head comprises a cylindrical body with one end open and the other end closed, a plurality of gas outlets are provided on the cylindrical body in the axial and circumferential directions, a high-temperature glass fiber layer covering the plurality of gas outlets is coated on the cylindrical body, the open end of the cylindrical body is detachably sealed and fixed to the housing through a flange, and the open end is connected to a premixing device that can be used to receive gas and can be mixed with air for pressurization. The open end of the cylindrical body is connected to a premixing device that can be used to receive gas and can be mixed with air for pressurization, so that the gas can be fully mixed with air before entering the cylindrical body, thereby improving the combustion efficiency. The high-temperature glass fiber layer coated thereon can effectively isolate high temperatures and extend the service life.

[0013] In the above-mentioned steam generator, the water inlet of the steam generation pipeline is located at the bottom or the lower side, and the steam outlet is located at the upper part or the upper side; The coil section of the steam generation pipeline at the steam outlet is two turns, and the coil section of the steam generation pipeline at the water inlet is four turns. The coil section is formed by gradually winding the extended section at the end of the spiral section toward the inner circle, then axially shifting and winding toward the outer circle again. The water inlet is located at the bottom or the lower side, and the steam outlet is located at the upper part or the upper side, which can ensure the smooth discharge of steam and avoid steam accumulation in the steam generation pipeline. The coil section at the steam outlet is two turns, and the coil section at the water inlet is four turns. This design provides a relatively closed combustion environment for the columnar burner head, and the water can be more fully preheated at the water inlet and can be quickly discharged at the steam outlet, thereby improving the efficiency of the entire steam generation pipeline.

[0014] In the above steam generator, the steam generation pipeline is made of finned tubes, and two axially adjacent circles of finned tubes on the spiral section are closely attached to each other through the first lodging; And / or, two radially adjacent circles of finned tubes on the coil section are closely attached to each other through a second lodging; And / or, the finned tubes between two axially adjacent spiral sections are radially offset and close to each other. The steam generation pipeline is made of finned tubes. The structure of the finned tubes greatly increases the heat exchange area, making the heat transfer more efficient, thereby improving the steam generation efficiency. The two axially adjacent circles of finned tubes on the spiral section are close to each other through the first inversion, and the two radially adjacent circles of finned tubes on the coil section are close to each other through the second inversion. This inversion structure is achieved by changing the shape of the fins. The originally arc-shaped fins are cut to have inverted parts that can be abutted against each other, which enhances the connection strength between the finned tubes, improves the stability of the entire steam generation pipeline, and extends the service life of the equipment.

[0015] In the above steam generator, the central axis of the steam generation pipeline is parallel to the bottom surface, a first water level monitor is provided at one third of the steam generation pipeline from the bottom, and a second water level monitor is provided at two thirds of the steam generation pipeline from the bottom. The water level data provided by the monitor can effectively prevent dry burning caused by too low a water level or overflow caused by too high a water level, thereby ensuring the normal operation of the equipment.

[0016] In the above-mentioned steam generator, the condenser comprises a cylindrical condenser shell, an air outlet is provided at the upper end of the condenser shell, an air inlet is provided at the lower end side, and an arc-shaped transition is provided on the side opposite to the air inlet. The condenser shell is provided with the preheating pipeline at one end of the air inlet, and a condensing pipeline is provided between the preheating pipeline and the air outlet. The condenser shell is provided with an air outlet at the upper end, an air inlet is provided at the lower end side, and an arc-shaped transition is provided on the side opposite to the air inlet. This design reduces the resistance of the airflow in the condenser. And the condensing pipeline is arranged between the preheating pipeline and the air outlet to ensure the efficiency of condensation.

[0017] In the above-mentioned steam generator, the preheating pipeline comprises a preheating tube which is arranged in a circuitous or serpentine shape on the condenser shell, and a preheating heat exchange fin is arranged on the preheating tube in the condenser shell; And / or, the condensation pipeline includes a condensation tube that is arranged on the condenser shell in a tortuous or serpentine shape, and a condensation heat exchange fin is arranged on the condensation tube in the condenser shell. The preheating pipeline and the condensation pipeline are both tortuous or serpentine, and this design increases the pipeline length, so that the heat exchange medium has a longer residence time in the pipeline, thereby improving the heat exchange efficiency. In addition, the provision of the preheating heat exchange fins and the condensation heat exchange fins further increases the heat exchange area, promotes heat transfer, and improves the overall heat exchange performance.

[0018] The condensation circuit includes a cold water pipe and a hot water pipe. One end of the cold water pipe is connected to the buffer water tank, and the other end is connected to one end of the condensation pipeline. One end of the hot water pipe is connected to the other end of the condensation pipeline, and the other end of the hot water pipe is connected to the buffer water tank.

[0019] The elbow of the preheating pipeline is located outside the condenser shell, and the elbow of the condensing pipeline is located outside the condenser shell. The outside of the condenser shell is covered with a heat insulation layer, and the heat insulation layer can cover the elbow.

[0020] In the above-mentioned steam generator, the water supply mechanism includes at least two water pumps, all water pump inlets are connected to the buffer water tank, all water pump outlets are connected in parallel to the first water supply pipe, and are connected to the preheating pipeline inlet through the first water supply pipe, and the preheating pipeline is connected to the water inlet of the steam generation pipeline through the second water supply pipe. A first flow meter is provided on the first water supply pipe. By setting up at least two water pumps, it can be ensured that when a single water pump fails, the other water pumps can continue to work, ensuring the continuity and stability of the water supply. The parallel water pump and water supply pipeline design allows a single water pump or pipeline to be repaired and replaced without stopping the machine, reducing maintenance costs and downtime.

[0021] In the above-mentioned steam generator, the steam generation pipeline is provided with a shafted spiral blade or a shaftless spiral blade; And / or, the preheating pipeline is provided with a shafted spiral blade or a shaftless spiral blade; And / or, the condensing pipeline is provided with an axial spiral blade or an axisless spiral blade. The provision of an axial spiral blade or an axisless spiral blade can effectively enhance the mixing effect of the fluid, can promote the formation of turbulence in the pipeline, increase the contact area, and thus improve the heat exchange efficiency.

[0022] Compared with the existing technology, the advantages are: 1. High heating efficiency, can output high temperature and high pressure steam. 2. With backup mechanism and parallel design, can ensure the steam output efficiency. 3. With self-checking design, can ensure the normal operation of the equipment. 4. With safety mechanism, can prevent equipment or staff from accidental damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the furnace structure provided by the present invention.

[0024] Figure 2 It is a front structural schematic diagram of the steam generator provided by the present invention.

[0025] Figure 3 It is a schematic diagram of the back structure of the steam generator provided by the present invention.

[0026] Figure 4 It is a schematic diagram of the structure of the columnar combustion head provided by the present invention.

[0027] Figure 5 The present invention is a schematic diagram of the structure of the steam generation pipeline.

[0028] Figure 6 It is a schematic diagram of the cross-sectional structure of the steam generation pipeline provided by the present invention.

[0029] Figure 7 It is a schematic diagram of the preheating pipeline structure provided by the present invention.

[0030] Figure 8 It is a schematic diagram of the condensation pipeline structure provided by the present invention.

[0031] Fig. 9 It is a structural schematic diagram of embodiment 2 provided by the present invention.

[0032] In the figure, a box 1, a furnace 11, a flue gas outlet 12, a steam generation pipeline 2, a spiral section 21, a coil unit 22, a coil section 23, an axial channel 24, a water inlet 25, a steam outlet 26, a fin tube 27, a first inverted 271, a second inverted 272, a first water level monitor 28, a second water level monitor 29, a columnar burner head 3, a cylindrical body 31, a gas outlet 32, a high-temperature glass fiber layer 33, a flange 34, an ion probe 341, an ignition device 342, a premixing device 35, an air duct 351, a mixing mechanism 352, a takeover mechanism 353, a condensing Device 4, preheating pipeline 41, preheating tube 411, preheating heat exchange fins 412, condensing pipeline 42, condensing tube 421, condensing heat exchange fins 422, condensing circuit 43, cold water pipe 431, hot water pipe 432, shell 44, air outlet 441, air inlet 442, arc transition 443, buffer water tank 5, steam trap 51, water supply mechanism 6, first water supply pipe 61, second water supply pipe 62, water pump 63, steam-water separator 7, water content detector 71, steam control valve 72, drain hole 73, steam pressure transmitter 74, mechanical pressure switch 75, steam safety valve 76. DETAILED DESCRIPTION

[0033] Embodiment 1 like Figure 1 As shown, a furnace body comprises a box body 1, a furnace chamber 11 of the box body 1 is provided with an axially spiral steam generating pipeline 2, the steam generating pipeline 2 comprises an axially spiral spiral section 21, coil units 22 are respectively provided at both ends of the spiral section 21, the coil unit 22 comprises a plurality of axially distributed and radially spiral hollow coil sections 23, an axial channel 24 is provided at the center of the coil section 23, a columnar burner head 3 is provided on the inner side of the steam generating pipeline 2, the flame distributed 360 degrees around the periphery of the columnar burner head 3 acts on the spiral section 21 and at least one end of the coil unit 22, the columnar burner head 3 is connected to one end of the box body 1, and a smoke outlet 12 is provided on the other end of the box body 1.

[0034] In this embodiment, by arranging the steam generating pipeline 2 and the columnar burner head 3 in the axial direction inside the box body 1, the columnar burner head 3 can heat the steam generating pipeline 2 to generate high-temperature steam, and the steam generating pipeline 2 is provided with a spiral section 21 and a coil section 23 surrounding the columnar burner head 3, which cooperates with the 360-degree distributed flame of the columnar burner head 3, greatly increasing the heating area, thereby achieving the effect of improving the heating efficiency and steam output efficiency.

[0035] like Figures 1 to 8As shown, a steam generator includes a box body 1, a smoke outlet 12 is connected to a condenser 4, a preheating pipeline 41 and a condensing pipeline 42 are provided on the condenser 4, the condensing pipeline 42 is connected to a buffer water tank 5 through a condensing circuit 43, a water inlet 25 of a steam generation pipeline 2 is connected to the preheating pipeline 41, the preheating pipeline 41 is connected to the buffer water tank 5 through a water supply mechanism 6, and a steam outlet 26 of the steam generation pipeline 2 is connected to a steam-water separator 7.

[0036] In the present embodiment, the flue gas generated by the combustion in the box 1 enters the condenser 4 through the flue gas outlet 12. A preheating pipeline 41 and a condensing pipeline 42 are provided in the condenser 4. This allows the preheating of the preheating pipeline 41 and the condensation of the condensing pipeline 42 to be completed in the condenser 4 at the same time, so that water can be more easily converted into steam after entering the steam generation pipeline 2, thereby increasing the overall operating efficiency while reducing energy consumption.

[0037] More specifically, the steam-water separator 7 is provided with a water content detector 71 capable of detecting the water content in the steam, the steam outlet of the steam-water separator 7 is provided with a steam control valve 72, and a drainage hole 73 is provided at the bottom of the steam-water separator 7. The drainage hole 73 is connected to the buffer water tank 5 through the steam trap 51. The buffer water tank 5 is covered with a heat-insulating layer, and the buffer water tank 5 is connected to the main water tank.

[0038] In this embodiment, if the water content detector 71 detects that the steam contains water, the steam control valve 72 is closed. At this time, the steam trap 51 is opened to discharge water into the buffer water tank 5 through the bypass until the steam contains no water and the steam control valve 72 is opened.

[0039] The steam-water separator 7 is also connected to a steam pressure transmitter 74, which can adjust the pressure of the output steam to meet different needs; the steam-water separator 7 is also connected to a mechanical pressure switch 75 and a steam safety valve 76, which mainly provide protection when the system pressure is abnormal. When the pressure in the steam-water separator 7 is too high, the steam safety valve 76 can automatically open to release the pressure to prevent equipment damage.

[0040] More specifically, the columnar burner head 3 includes a cylindrical body 31 which is open at one end and closed at the other end. A plurality of gas outlets 32 are provided on the cylindrical body 31 in the axial and circumferential directions. The cylindrical body 31 is coated with a high-temperature glass fiber layer 33 which covers the plurality of gas outlets 32. The open end of the cylindrical body 31 is detachably sealed and fixed to the casing 1 through a flange 34, and the open end is connected to a premixing device 35 which can be used to receive gas and mix and pressurize it with air.

[0041] In this embodiment, the connection between the cylindrical body 31 and the housing 1 through the flange 34 is provided with an ignition device 342 and an ion probe 341 capable of detecting the flame state in the furnace, and the ion probe 341 has the function of confirming ignition and transmitting an ignition signal. The open end of the cylindrical body 31 is connected to the air duct 351 of the premixing device 35, and the other end of the air duct is connected to the mixing mechanism 352. At the connection between the air duct and the cylindrical body 31 and the mixing mechanism 352, a detachable connecting mechanism 353 is provided.

[0042] More specifically, the water inlet 25 of the steam generation pipeline 2 is located at the bottom or lower side, and the steam outlet 26 is located at the upper part or upper side; The coil section 23 of the steam generation pipeline 2 located at the steam outlet 26 has two turns, and the coil section 23 of the steam generation pipeline 2 located at the water inlet 25 has four turns.

[0043] In this embodiment, the coil section 23 is formed by the extension section at the end of the spiral section 21 gradually winding toward the inner circle, then axially changing position, and then winding toward the outer circle again. The gradually tightened coil sections 23 are arranged at both ends of the spiral section 21. Such a design provides a more closed environment for combustion, and the gas has been mixed with the air in advance, so that the effect of improving the heating efficiency can be achieved.

[0044] More specifically, the steam generation pipeline 2 is made of finned tubes 27 , and two radially adjacent circles of finned tubes 27 on the coil section 23 are closely attached to each other through the second lodging 272 .

[0045] The fins of the fin tube 27 with the second inversion 272 are reshaped by reshaping the originally arc-shaped fins so that they have inverted parts that can fit tightly together. This not only increases the heat exchange area to improve the heat exchange efficiency, but also solves the shortcoming of the circular fins that are not tightly fitted, and makes the structure more solid, thereby achieving a more durable effect.

[0046] More specifically, the central axis of the steam generation pipeline 2 is parallel to the bottom surface, a first water level monitor 28 is provided at one-third of the steam generation pipeline 2 from its bottom, and a second water level monitor 29 is provided at two-thirds of the steam generation pipeline 2 from its bottom.

[0047] In this embodiment, when preparing to start the machine, the second water level monitor 29 is used to determine whether the water level has reached 2 / 3 of the height of the steam generating pipeline 2 in the box body 1. If the water level is too low, water is injected at a preset frequency through the water pump 63. If at least 2 / 3 of the water is not filled within the preset injection time, it is determined that the water injection failure occurs, an alarm is sounded, the water injection is stopped, and the system is not started.

[0048] More specifically, the condenser 4 includes a cylindrical condenser shell 44, an air outlet 441 is provided at the upper end of the condenser shell 44, an air inlet 442 is provided at the lower end side, an arc transition 443 is provided on the side opposite to the air inlet 442, a preheating pipeline 41 is provided on the condenser shell 44 at one end of the air inlet 442, and a condensing pipeline 42 is provided between the preheating pipeline 41 and the air outlet 441.

[0049] More specifically, the preheating pipeline 41 includes a preheating tube 411 that is arranged on the condenser shell 44 in a circuitous or serpentine shape, and a preheating heat exchange fin 412 is arranged on the preheating tube 411 in the condenser shell 44; The condensation pipeline 42 includes a condensation tube 421 which is arranged on the condenser shell 44 in a circuitous or serpentine shape. Condensation heat exchange fins 422 are arranged on the condensation tube 421 in the condenser shell 44 .

[0050] In this embodiment, the condensation circuit 43 includes a cold water pipe 431 and a hot water pipe 432. One end of the cold water pipe 431 is connected to the buffer water tank 5, and the other end is connected to one end of the condensation pipeline 42. One end of the hot water pipe 432 is connected to the other end of the condensation pipeline 42, and the other end of the hot water pipe 432 is connected to the buffer water tank 5. That is, the condensation pipeline 42 and the preheating pipeline 41 are both arranged in the condenser 4, wherein the condensation pipeline 42 is connected to the buffer water tank 5 alone through the condensation circuit 43, which is equivalent to an independent circuit.

[0051] The elbow of the preheating line 41 is located outside the condenser shell 44, and the elbow of the condensing line 42 is located outside the condenser shell 44. The outside of the condenser shell 44 is coated with a heat insulation layer, and the heat insulation layer can cover the elbow. Placing the larger elbow outside the condenser shell 44 can save internal space, thereby improving the condensation and preheating efficiency. The outside of the condenser shell 44 is coated with a heat insulation layer, and the heat insulation layer can cover the elbow, which further enhances the condensation and preheating efficiency.

[0052] More specifically, the water supply mechanism 6 includes at least two water pumps 63, the inlets of all water pumps 63 are connected to the buffer water tank 5, and the outlets of all water pumps 63 are connected in parallel to the first water supply pipe 61, and are connected to the inlet of the preheating pipeline 41 through the first water supply pipe 61, and the preheating pipeline 41 is connected to the water inlet 25 of the steam generation pipeline 2 through the second water supply pipe 62. A first flow meter is provided on the first water supply pipe 61.

[0053] In this embodiment, the frequency converters of the two water pumps 63 automatically control the water inlet frequency according to the steam temperature and the water inlet flow rate. When the water inlet flow rate does not increase or decrease rapidly after the frequency of one of the water pumps 63 is rapidly increased, the other water pump 63 is automatically activated to replenish water. After the normal water inlet volume is reached, the other water pump 63 automatically enters the standby state. In addition, when the water pump 63 fails during operation, it will automatically reset immediately. If the failure accumulates more than 10 times, it will automatically switch to another water pump 63. If the automatic reset times of both water pumps 63 are used up, the alarm will stop the furnace, and high-pressure purge will be performed to cool the furnace 11.

[0054] More specifically, the steam generation pipeline 2 is provided with an axial spiral blade; the preheating pipeline 41 is provided with an axial spiral blade; and the condensation pipeline 42 is provided with an axial spiral blade.

[0055] The working principle of this embodiment is that before starting, the first water level monitor 28 and the second water level monitor 29 are detected to be connected. The first water level monitor 28 is at 1 / 3 of the height of the steam generation pipeline 2. If this point is disconnected, the water pump 63 automatically starts in the standby state to automatically replenish water to the position of the second water level monitor 29 at a frequency of 5-10 Hz. The second water level monitor 29 is at 2 / 3 of the height of the steam generation pipeline 2. If the water pump 63 is started for more than 2 minutes and the liquid level still cannot reach the position of the second water level monitor 29, it is determined to be water shortage, an alarm is issued, and the boiler is not started.

[0056] After confirming that there is no problem with the water level at the first water level monitor 28 and the second water level monitor 29, the liquid levels of the buffer water tank 5 and the main water tank are detected and confirmed to be safe liquid levels to ensure that the water pump 63 and the buffer water tank 5 will not suck in air due to lack of water during operation, resulting in insufficient flow and failure of the water pump 63. The above monitoring points are pulse signals, which are scanned on and off every 2 seconds to prevent the signal line from sticking and transmitting false signals. At the same time, if the signal cannot be transmitted back, the disconnection fault is handled, a pop-up window and an alarm are displayed, and the processing and inspection steps are prompted on the screen.

[0057] Then refer to the following set data to check whether the gas pressure and temperature meet the start-up conditions. Among them, furnace temperature (below 300 degrees); exhaust temperature (below 150 degrees); water inlet temperature (below 100 degrees); steam temperature (below 230 degrees); steam pressure transmitter 74 pressure (below the start pressure, start pressure 0.5Mpa, target pressure 0.6Mpa, stop pressure 0.7Mpa); whether the first flow meter is reset to zero. Among them, the above signals are 4-20 mA signals, shielded wires are used to prevent signal interference, and pulse on and off processing is performed to prevent false signals. After the on-off, if the signal cannot be returned, it will be handled as a disconnection fault, an alarm, a pop-up window, and prompts on the screen to handle the inspection steps.

[0058] Then check whether the following communication signal connection feedback is normal. Including whether the columnar combustion head 3 is communicating normally; whether the screen and control system are communicating normally; whether the water pump 63 is communicating normally; whether the first flow meter is communicating normally; whether the screen IoT module is connected to the Internet normally. If the above signals are not connected to the communication, the pulse is on and off three times and the communication cannot be connected, and a fault is reported and a pop-up window is displayed.

[0059] After confirming the start conditions, press the start button to start the system. When the system is first started, the condensation pipeline 42 on the condenser 4 and the buffer water tank 5 are heat exchanged through the condensation circuit 43, and then the columnar burner head 3 is ignited after high-pressure purge. After successful ignition, the water pump 63 slowly replenishes water at a frequency of 5 Hz.

[0060] The water in the steam generation pipeline 2 starts to generate steam after being heated. In order to prevent the steam from carrying water, the steam temperature is detected by the water content detector 71. When the steam temperature is below 130 degrees, the steam control valve 72 is closed, and the steam trap 51 is opened to send the water-containing steam back to the buffer water tank 5 through the bypass until the steam temperature reaches above 130 degrees and does not contain water.

[0061] After the combustion in the furnace 11 is stable, the water pump 63 starts to slowly increase the frequency to 15 Hz, and matches the frequency with the rise and fall of the steam temperature, and the speed-up delay is 3 seconds. The frequency of the water pump 63 increases quickly when the temperature is high, and the frequency increases slowly when the temperature is low. At the same time, the power percentage output by the columnar burner 3 is controlled according to the comparison between the speed of increasing steam pressure and the target pressure value. After reaching the target pressure, the minimum output power is used to maintain the constant pressure within the range of ±0.1Mpa of the target pressure. When the steam pressure is close to the stop pressure, the pressure is packed at the minimum power.

[0062] When shutdown is required, press the equipment stop button to shut down. First, the columnar burner head 3 starts to stop outputting, and then the columnar burner head 3 is purged after being extinguished. The water pump 63 stops rotating 5 seconds after the columnar burner head 3 stops outputting.

[0063] Subsequently, when the steam temperature is lower than 120 degrees, the drain valve opens, and the water pump 63 restarts to replenish water at a frequency of 50 Hz to flush and drain the steam generation pipeline 2. After flushing for 5 minutes, the water pump 63 is turned off, and the drain valve is closed after a delay of 2 minutes, and the shutdown is completed.

[0064] Embodiment 2 The content of this embodiment is basically the same as that of the first embodiment, except that: Fig. 9 As shown, two axially adjacent circles of finned tubes 27 on the spiral segment 21 are closely attached to each other through the first inversion 271; the finned tubes 27 between two axially adjacent spiral segments 21 are radially staggered and closely attached to each other.

[0065] In this embodiment, the heating area is further increased by axially dislocating and the two axially adjacent circles of finned tubes 27 on the spiral section 21 are closely attached to each other through the first inversion 271, thereby increasing the heating efficiency and steam output efficiency and further increasing the structural strength.

[0066] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0067] Although this article uses the terms such as box, furnace, flue gas outlet, steam generation pipeline, spiral section, coil unit, coil section, axial channel, water inlet, steam outlet, finned tube, first inversion, second inversion, first water level monitor, second water level monitor, columnar burner head, cylindrical body, gas outlet, high-temperature glass fiber layer, flange, ignition device, ion probe, premixing device, air duct, mixing mechanism, connecting mechanism, condenser, preheating pipeline, preheating tube, preheating heat exchange fin, condensation pipeline, condensation tube, condensation heat exchange fin, condensation circuit, cold water pipe, hot water pipe, shell, air outlet, air inlet, arc transition, buffer water tank, steam trap, water supply mechanism, first water supply pipe, second water supply pipe, water pump, steam-water separator, water content detector, steam control valve, drain hole, steam pressure transmitter, mechanical pressure switch, steam safety valve, etc., it does not exclude the possibility of using other terms. These terms are used only to more conveniently describe and explain the essence of the present invention. Any additional limitations interpreted as such are contrary to the spirit of the present invention.

Claims

1. A furnace body, characterized in that: The invention comprises a casing (1), wherein a furnace (11) of the casing (1) is provided with an axially spiral steam generating pipeline (2), wherein the steam generating pipeline (2) comprises a spiral section (21) in an axial spiral shape, and coil units (22) are respectively provided at both ends of the spiral section (21), wherein the coil unit (22) comprises a plurality of hollow coil sections (23) in a radial spiral shape and distributed along the axial direction, wherein an axial channel (24) is provided at the center of the coil section (23), wherein a columnar burner (3) is provided on the inner side of the steam generating pipeline (2), wherein flames distributed 360 degrees around the periphery of the columnar burner (3) act on the spiral section (21) and the coil unit (22) at at least one end, wherein the columnar burner (3) is connected to one end of the casing (1), and a smoke outlet (12) is provided at the other end of the casing (1).

2. A steam generator, characterized in that: It comprises a housing (1) as claimed in claim 1, wherein the smoke outlet (12) is connected to a condenser (4), a preheating pipeline (41) and a condensing pipeline (42) are provided on the condenser (4), the condensing pipeline (42) is connected to a buffer water tank (5) via a condensing circuit (43), the water inlet (25) of the steam generation pipeline (2) is connected to the preheating pipeline (41), the preheating pipeline (41) is connected to the buffer water tank (5) via a water supply mechanism (6), and the steam outlet (26) of the steam generation pipeline (2) is connected to a steam-water separator (7).

3. The steam generator according to claim 2, characterized in that: The steam-water separator (7) is provided with a water content detector (71) capable of detecting the water content in the steam, the steam outlet of the steam-water separator (7) is provided with a steam control valve (72), and a drainage hole (73) is provided at the bottom of the steam-water separator (7), and the drainage hole (73) is connected to the buffer water tank (5) through a steam trap (51).

4. The steam generator according to claim 2, characterized in that: The columnar burner head (3) comprises a cylindrical body (31) with an open end and a closed end. The cylindrical body (31) is provided with a plurality of gas outlets (32) in the axial direction and the circumferential direction. The cylindrical body (31) is coated with a high-temperature glass fiber layer (33) covering the plurality of gas outlets (32). The open end of the cylindrical body (31) is detachably sealed and fixed to the housing (1) via a flange (34), and the open end is connected to a pre-mixing device (35) capable of receiving gas and mixing with air for pressurization.

5. The steam generator according to claim 2, characterized in that: The water inlet (25) of the steam generation pipeline (2) is located at the bottom or the lower side, and the steam outlet (26) is located at the upper part or the upper side; The coil section (23) of the steam generation pipeline (2) located at the steam outlet (26) has two turns, and the coil section (23) of the steam generation pipeline (2) located at the water inlet (25) has four turns.

6. The steam generator according to claim 2, characterized in that: The steam generation pipeline (2) is made of finned tubes (27), and two axially adjacent circles of finned tubes (27) on the spiral section (21) are closely attached to each other through a first lodging (271); and / or, two radially adjacent circles of finned tubes (27) on the coiled tube section (23) are closely attached to each other through a second lodging (272); And / or, the finned tubes (27) between two axially adjacent spiral segments (21) are radially offset and closely attached to each other.

7. The steam generator according to claim 2, characterized in that: The central axis of the steam generation pipeline (2) is parallel to the bottom surface, a first water level monitor (28) is provided at one third of the steam generation pipeline (2) from the bottom, and a second water level monitor (29) is provided at two thirds of the steam generation pipeline (2) from the bottom.

8. The steam generator according to any one of claims 2 to 7, characterized in that: The condenser (4) comprises a cylindrical condenser shell (44), an air outlet (441) is provided at the upper end of the condenser shell (44), an air inlet (442) is provided at the lower end side, an arc-shaped transition (443) is provided on the side opposite to the air inlet (442), the preheating pipeline (41) is provided on one end of the condenser shell (44) located at the air inlet (442), and a condensing pipeline (42) is provided between the preheating pipeline (41) and the air outlet (441).

9. The steam generator according to claim 8, characterized in that: The preheating pipeline (41) comprises a preheating pipe (411) which is arranged on the condenser shell (44) in a circuitous or serpentine shape, and a preheating heat exchange fin (412) is arranged on the preheating pipe (411) in the condenser shell (44); And / or, the condensation pipeline (42) comprises a condensation tube (421) which is arranged on the condenser shell (44) in a circuitous or serpentine shape, and a condensation heat exchange fin (422) is provided on the condensation tube (421) in the condenser shell (44).

10. The steam generator according to any one of claims 2 to 7, characterized in that: The water supply mechanism (6) comprises at least two water pumps (63), the inlets of all the water pumps (63) are connected to the buffer water tank (5), the outlets of all the water pumps (63) are connected in parallel to the first water supply pipe (61), and are connected to the inlet of the preheating pipeline (41) through the first water supply pipe (61), and the preheating pipeline (41) is connected to the water inlet (25) of the steam generation pipeline (2) through the second water supply pipe (62).

11. The steam generator according to any one of claims 2 to 7, characterized in that: The steam generation pipeline (2) is provided with a shafted spiral blade or a shaftless spiral blade; And / or, the preheating pipeline (41) is provided with a shafted spiral blade or a shaftless spiral blade; And / or, the condensation pipeline (42) is provided with a shafted spiral blade or a shaftless spiral blade.

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