Gas-steam boiler

Abstract

The utility model discloses a gas-steam boiler which comprises a boiler body and a control cabinet, a corrugated boiler furnace is arranged in the boiler body, one end of the boiler furnace is communicated with a burner, and the other end of the boiler furnace is communicated with a reversal chamber; the reversal chamber is communicated with the first threaded smoke pipe, the first threaded smoke pipe is communicated with the front smoke box, the front smoke box is further communicated with the second threaded smoke pipe, and the second threaded smoke pipe is communicated with the rear smoke box. The rear smoke box is communicated with the energy saver through a first exhaust pipe, and the energy saver is communicated with the chimney through a second exhaust pipe; a filtering assembly perpendicular to the axial direction of the pipeline is arranged in the second exhaust pipe. The flue gas three-return-stroke structure is adopted for carrying out waste heat recovery on high-temperature flue gas generated by fuel combustion, so that heat exchange is generated between the high-temperature flue gas and water in the boiler to form water vapor, the flue gas waste heat utilization efficiency is improved, meanwhile, the filtering assembly is arranged in the tail second smoke exhaust pipe to recycle impurities in the flue gas, and the energy consumption is reduced. And the flue gas reaches the emission standard, and energy conservation and environmental protection are achieved.

Description

Technical Field

[0001] This utility model relates to the field of boiler technology, specifically to a gas-fired steam boiler. Background Technology

[0002] A boiler is an energy conversion device. The energy input to a boiler includes the chemical energy of fuel and electrical energy. The boiler then outputs steam, high-temperature water, or organic heat carriers with a certain amount of thermal energy. Among them, a gas-fired steam boiler is a device that generates steam by burning gas. However, at present, the heat in the production process of gas-fired steam boilers cannot be effectively recovered, and the flue gas produced is generally directly discharged into the external environment through the chimney, which has certain environmental hazards. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a gas-fired steam boiler that can recover waste heat from the high-temperature flue gas generated during boiler operation and treat the emitted flue gas to meet emission requirements.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows.

[0005] A gas-fired steam boiler includes a boiler body and a control cabinet. The boiler body contains a corrugated furnace, one end of which is connected to a burner, and the other end to a combustion chamber. The combustion chamber is connected to a first threaded flue pipe, which is connected to a front smoke box. The front smoke box is also connected to a second threaded flue pipe, which is connected to a rear smoke box. The rear smoke box is connected to an economizer via a first exhaust pipe, and the economizer is connected to a chimney via a second exhaust pipe. A filter assembly perpendicular to the pipe's axial direction is installed inside the second exhaust pipe. A PLC controller is installed inside the control cabinet.

[0006] In the aforementioned gas-fired steam boiler, the filter assembly includes a sponge adsorption pad and a silicone adsorption pad arranged sequentially, with a ceramic fiber filter screen disposed between the sponge adsorption pad and the silicone adsorption pad, and ceramic fiber filter screens also disposed on the outer sides of the sponge adsorption pad and the silicone adsorption pad respectively.

[0007] The aforementioned gas-fired steam boiler is provided with a boiler inlet, a steam outlet, a surface drain outlet, a bottom drain outlet, an inspection hole, and an inspection ladder on its main body.

[0008] The aforementioned gas-fired steam boiler has an insulation layer on the inner wall of its main body, which is composed of glass wool.

[0009] The aforementioned gas-fired steam boiler is equipped with a pressure gauge, a boiler inlet water flow meter, a steam flow meter, and a boiler inlet water thermometer. The output terminals of the pressure gauge, boiler inlet water flow meter, steam flow meter, and boiler inlet water thermometer are respectively connected to the output terminals of the PLC controller.

[0010] In the aforementioned gas-fired steam boiler, a fuel consumption meter is installed on the burner, and the output terminal of the fuel consumption meter is connected to the output terminal of the PLC controller.

[0011] In the aforementioned gas-fired steam boiler, the energy-saving device is equipped with an energy-saving device inlet flow meter, and the output terminal of the energy-saving device inlet flow meter is connected to the output terminal of the PLC controller.

[0012] The gas-fired steam boiler described above has a flue gas thermometer installed on the second exhaust pipe, and the output terminal of the flue gas thermometer is connected to the output terminal of the PLC controller.

[0013] The aforementioned gas-fired steam boiler is also equipped with an alarm device, the controlled terminal of which is connected to the input terminal of a PLC controller.

[0014] Due to the adoption of the above technical solutions, the technological progress achieved by this utility model is as follows.

[0015] This utility model provides a gas-fired steam boiler. By setting a wet-back type large-diameter corrugated furnace inside the boiler body and adopting a three-pass flue gas structure, the high-temperature flue gas generated by fuel combustion is recovered for waste heat. When the flue gas passes through the furnace, the first threaded flue pipe, and the second threaded flue pipe, it exchanges heat with the water in the boiler to form steam. At the same time, the waste heat of the flue gas is recovered again by an energy-saving device, which improves the efficiency of flue gas waste heat utilization. In addition, a filter component is set in the second exhaust pipe at the tail to recover and reuse impurities in the flue gas, so that the flue gas meets the emission standards, which is energy-saving and environmentally friendly. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the specific structure of the present utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the boiler body described in this utility model;

[0018] Figure 3 This is a side view of the interior of the boiler body described in this utility model;

[0019] Figure 4 This is a schematic diagram showing the flue gas flow direction during boiler operation.

[0020] Figure 5 Diagram showing the layout of measuring points on the boiler;

[0021] Figure 6 This is a schematic diagram of the specific structure of the filter assembly described in this utility model.

[0022] The components are as follows: 1. Boiler body, 2. Burner, 3. Steam outlet, 4. Surface drain port, 5. Bottom drain port, 6. Inspection hole, 7. Eco-friendly device, 8. First exhaust pipe, 9. Maintenance ladder, 10. Pressure gauge, 11. Insulation layer, 12. Second exhaust pipe, 13. Furnace shell, 14. Combustion chamber, 15. First threaded smoke pipe, 16. Second threaded smoke pipe, 17. Steam-water separator, 18. Boiler inlet, 19. Front smoke box, 20. Rear smoke box, 21. Fuel consumption meter, 22. Boiler inlet water flow meter, 23. Steam flow meter, 24. Eco-friendly device inlet water flow meter, 25. Exhaust gas thermometer, 26. Boiler inlet water thermometer, 27. Ceramic fiber filter, 28. Sponge absorbent pad, 29. Silicone absorbent pad. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0024] Gas-fired steam boilers, such as Figures 1 to 6 As shown, the boiler includes a boiler body 1 and a control cabinet. The boiler body 1 is equipped with a corrugated furnace 13. The furnace 13 adopts a wet-back structure. One end of the furnace 13 is connected to the burner 2, and the other end is connected to the combustion chamber 14. The combustion chamber 14 is connected to the first threaded smoke pipe 15. The first threaded smoke pipe 15 is connected to the front smoke box 19. The front smoke box 19 is also connected to the second threaded smoke pipe 16. The second threaded smoke pipe 16 is connected to the rear smoke box 20. The rear smoke box 20 is connected to the economizer 7 through the first exhaust pipe 8. The economizer 7 is connected to the chimney through the second exhaust pipe 12. The second exhaust pipe 12 is equipped with a filter assembly arranged perpendicular to the pipeline axis.

[0025] The filter assembly includes a sponge adsorption pad 28 and a silicone adsorption pad 29 arranged in sequence. A ceramic fiber filter screen 27 is disposed between the sponge adsorption pad 28 and the silicone adsorption pad 29. Ceramic fiber filter screens 27 are also disposed on the outer sides of the sponge adsorption pad 28 and the silicone adsorption pad 29. The ceramic fiber filter screen 27, the sponge adsorption pad 28, and the silicone adsorption pad 29 adsorb pollutants in the flue gas, so that the flue gas meets the emission standards. At the same time, the ceramic fiber filter screen 27, the sponge adsorption pad 28, and the silicone adsorption pad 29 are made of high temperature resistant materials, which can withstand the impact of high temperature flue gas and have a long service life.

[0026] An insulation layer 11 is provided on the inner wall of the boiler body 1. The insulation layer 11 is mainly composed of ultrafine glass wool, which reduces the heat loss of the boiler.

[0027] The boiler body 1 is also equipped with a boiler inlet 18, a steam outlet 3, a surface drain outlet 4, a bottom drain outlet 5, an inspection hole 6, and an inspection ladder 9. The steam outlet 3 is connected to the steam-water separator 17 installed inside the boiler body 1.

[0028] The surface drain port 4 is connected to the continuous drain pipe inside the upper part of the boiler body 1, and is used to discharge the high concentration of salt and impurities in the upper part of the boiler drum to maintain the boiler water quality.

[0029] Bottom drain 5 is located at the bottom of the boiler body 1 and is used to discharge sludge, impurities and highly concentrated slag deposited at the bottom of the boiler.

[0030] The inspection hole 6 is located on one side of the combustion chamber 14, which is easy to open and convenient for maintenance. At the same time, the maintenance ladder 9 is located on the side of the boiler body 1, which facilitates maintenance of the upper part of the boiler.

[0031] The burner 2 is equipped with a fuel consumption meter 21, which can detect the amount of fuel consumed.

[0032] The boiler body 1 is equipped with a pressure gauge 10, a boiler inlet water flow meter 22, a steam flow meter 23, and a boiler inlet water thermometer 26. The pressure gauge 10 can detect the steam pressure. The boiler inlet water flow meter 22 and the boiler inlet water thermometer 26 are used to measure the inlet water flow and temperature at the boiler inlet 18. The steam flow meter 23 can detect the steam flow at the steam outlet 3.

[0033] The energy saver 7 is equipped with an energy saver inlet flow meter 24, which can detect the flow rate at the inlet of the energy saver 7.

[0034] A flue gas thermometer 25 is installed on the second exhaust pipe 12. The flue gas thermometer 25 detects the temperature of the flue gas discharged from the energy-saving device 7 to ensure the full utilization of the waste heat of the flue gas.

[0035] The control cabinet is equipped with a PLC controller. The output terminals of the fuel consumption meter 21, pressure gauge 10, boiler inlet water flow meter 22, steam flow meter 23, boiler inlet water thermometer 26, energy saver inlet water flow meter 24, and flue gas thermometer 25 are respectively connected to the output terminals of the PLC controller.

[0036] An alarm is also installed on the boiler body 1. The controlled end of the alarm is connected to the input end of the PLC controller. When the relevant values ​​sent by the fuel consumption flow meter 21, pressure gauge 10, boiler inlet water flow meter 22, steam flow meter 23, boiler inlet water thermometer 26, energy saver inlet water flow meter 24, and flue gas thermometer 25 exceed a certain range, the PLC controller will control the alarm to sound and then stop the boiler from working.

[0037] When in use, the fuel enters the burner 2 and generates a high-temperature flame. The high-temperature flame enters the combustion chamber from the front end of the furnace and burns inside the furnace. The generated flue gas enters the combustion chamber 14, the first threaded smoke pipe 15, the front smoke box 29, the second threaded smoke pipe 16, and the rear smoke box 20 in sequence along the furnace, and enters the economizer 7 through the first exhaust pipe 8 for waste heat recovery.

[0038] At the same time, the heat generated by fuel combustion is transferred to the water in the boiler through the furnace, heating the water and evaporating it into steam. The flue gas flowing through the first threaded smoke pipe 15 and the second threaded smoke pipe 16 also exchanges heat with the water in the boiler.

[0039] Finally, after being discharged from the energy-saving device 7, the flue gas enters the second exhaust pipe 12. The filter components in the second exhaust pipe 12 will filter the impurities in the flue gas, and after meeting the emission requirements, it will be discharged into the external environment through the chimney.

[0040] This utility model provides a gas-fired steam boiler. By setting a wet-back type large-diameter corrugated furnace inside the boiler body and adopting a three-pass flue gas structure, the high-temperature flue gas generated by fuel combustion is recovered for waste heat. When the flue gas passes through the furnace, the first threaded flue pipe, and the second threaded flue pipe, it exchanges heat with the water in the boiler to form steam. At the same time, the waste heat of the flue gas is recovered again by an energy-saving device, which improves the efficiency of flue gas waste heat utilization. In addition, a filter component is set in the second exhaust pipe at the tail to recover and reuse impurities in the flue gas, so that the flue gas meets the emission standards, which is energy-saving and environmentally friendly.

Claims

1. A gas-fired steam boiler, characterized in that: The boiler includes a boiler body (1) and a control cabinet. The boiler body (1) is equipped with a corrugated furnace (13). One end of the furnace (13) is connected to the burner (2), and the other end is connected to the combustion chamber (14). The combustion chamber (14) is connected to the first threaded smoke pipe (15), which is connected to the front smoke box (19). The front smoke box (19) is also connected to the second threaded smoke pipe (16), which is connected to the rear smoke box (20). The rear smoke box (20) is connected to the energy saver (7) through the first exhaust pipe (8), and the energy saver (7) is connected to the chimney through the second exhaust pipe (12). The second exhaust pipe (12) is equipped with a filter assembly that is perpendicular to the pipeline axis. The control cabinet is equipped with a PLC controller.

2. The gas-fired steam boiler according to claim 1, characterized in that: The filter assembly includes a sponge adsorption pad (28) and a silicone adsorption pad (29) arranged in sequence. A ceramic fiber filter screen (27) is arranged between the sponge adsorption pad (28) and the silicone adsorption pad (29). A ceramic fiber filter screen (27) is also arranged on the outer side of the sponge adsorption pad (28) and the silicone adsorption pad (29).

3. The gas-fired steam boiler according to claim 1, characterized in that: The boiler body (1) is provided with a boiler inlet (18), a steam outlet (3), a surface drain outlet (4), a bottom drain outlet (5), an inspection hole (6), and an inspection ladder (9).

4. The gas-fired steam boiler according to claim 1, characterized in that: The boiler body (1) has an insulation layer (11) on its inner wall, which is made of glass wool.

5. The gas-fired steam boiler according to claim 1, characterized in that: The boiler body (1) is equipped with a pressure gauge (10), a boiler inlet flow meter (22), a steam flow meter (23), and a boiler inlet thermometer (26). The output terminals of the pressure gauge (10), the boiler inlet flow meter (22), the steam flow meter (23), and the boiler inlet thermometer (26) are respectively connected to the output terminal of the PLC controller.

6. The gas-fired steam boiler according to claim 1, characterized in that: The burner (2) is equipped with a fuel consumption meter (21), and the output of the fuel consumption meter (21) is connected to the output of the PLC controller.

7. The gas-fired steam boiler according to claim 1, characterized in that: The energy-saving device (7) is equipped with an energy-saving device inlet flow meter (24), and the output end of the energy-saving device inlet flow meter (24) is connected to the output end of the PLC controller.

8. The gas-fired steam boiler according to claim 1, characterized in that: A smoke exhaust thermometer (25) is installed on the second exhaust pipe (12), and the output end of the smoke exhaust thermometer (25) is connected to the output end of the PLC controller.

9. The gas-fired steam boiler according to claim 1, characterized in that: An alarm is also installed on the boiler body (1), and the controlled end of the alarm is connected to the input end of the PLC controller.

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