Direct current unattended gas steam generator

Abstract

The utility model discloses a direct current exempts from monitoring and examines gas steam generator belongs to steam generator technical field, including frame, one end of frame top is equipped with combustion chamber, and the air inlet of combustion chamber top is equipped with combustion fan, and the air inlet of combustion fan is equipped with proportional control valve. The utility model discloses through the configuration water vapor separation bucket, can carry out efficient separation to the steam-water mixture of steam generator generation, and the redundant moisture of steam is removed accurately, solves the steam water problem from the root, ensures the dryness and the purity of output steam to reach the standard, and simultaneously, the separation mechanism and the design of water flow higher than the rated demand form the cooperation, effectively avoid the steam state interference of external factors such as gas heat value fluctuation, feed water temperature change, combustion state instability, realize the sustained and stable output of steam parameter, satisfy the strict demand of all kinds of industrial or civil scene to steam quality.

Description

Technical Field

[0001] This utility model relates to a DC inspection-free gas-fired steam generator, belonging to the technical field of steam generators. Background Technology

[0002] Most DC steam generators on the market currently operate by precisely controlling the ratio of gas flow to water flow at a fixed value, allowing water to undergo multiple heat exchange cycles and directly output steam. This method requires extremely precise control of gas and water flow and is affected by changes in multiple conditions such as gas calorific value, feed water temperature, and combustion state. The output steam state will also fluctuate accordingly, and dry burning can easily damage the equipment, affecting the customer's user experience. To address these issues, a DC-DC, inspection-free gas-steam generator was designed. Utility Model Content

[0003] The main purpose of this invention is to provide a DC inspection-free gas-steam generator to solve the problems mentioned in the background art.

[0004] The objective of this utility model can be achieved by adopting the following technical solution: A DC inspection-free gas-steam generator includes a frame, a combustion chamber at one end of the top of the frame, a combustion fan at the air inlet at the top of the combustion chamber, and a proportional regulating valve at the air inlet of the combustion fan. A secondary heater is provided at the flue gas output end of the combustion chamber, and a condenser is installed at the flue gas output end of the secondary heater on the top of the frame. The water outlet of the condenser is connected to the inside of the combustion chamber. A water-vapor separator is installed at the top of the frame near the combustion chamber. The steam output end of the combustion chamber is connected to the steam inlet of the water-vapor separator, and the steam outlet of the water-vapor separator is connected to the interior of the secondary heater. A steam outlet pipe is provided on the outside of the secondary heater. A mixing tank is installed at the top of the frame away from the water vapor separator. The drain outlet of the water vapor separator is connected to the return water inlet of the mixing tank. A cold water inlet for connecting to an external low-temperature water source is provided on the side of the mixing tank. A booster pump is provided on the side of the mixing tank. The input end of the booster pump is connected to the outlet end of the mixing tank. A water flow regulating valve is installed at the output end of the booster pump. The water supply end of the water flow regulating valve is connected to the water inlet channel of the condenser.

[0005] Preferably, the steam-water separation tank is equipped with a steam-water separation component inside, which is at least one of a baffle plate group, a cyclone separator core, or a wire mesh separation layer, and the steam-water separation component is located between the steam inlet and the steam outlet of the steam-water separation tank.

[0006] Preferably, the mixing tank is equipped with a temperature sensor, which is electrically connected to a water flow regulating valve or a booster pump to adjust the inlet water flow or the delivery volume of the booster pump according to the temperature of the mixed water in the mixing tank.

[0007] Preferably, the secondary heater is a multi-pass spiral tube heat exchanger, with the steam inlet end of the multi-pass spiral tube connected to the steam outlet end of the water-steam separator, and the heat exchange area of ​​the multi-pass spiral tube completely covering the flame radiation range of the combustion chamber.

[0008] Preferably, a liquid level sensor is installed on the side wall of the mixing tank. The liquid level sensor is electrically connected to the solenoid valve at the cold water inlet of the mixing tank so as to activate water replenishment when the liquid level in the tank is lower than the set value.

[0009] Preferably, the combustion chamber is equipped with an igniter, and the control terminal of the igniter is linked to the start / stop control circuit of the combustion fan.

[0010] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model, by configuring a water-vapor separator, can efficiently separate the steam-water mixture generated by the steam generator, accurately remove excess water entrained in the steam, and fundamentally solve the problem of water carryover in the steam. This ensures that the dryness and purity of the output steam meet the standards. At the same time, this separation mechanism works synergistically with the design of a water flow rate exceeding the rated demand to effectively avoid interference from external factors such as fluctuations in the calorific value of the gas, changes in the feedwater temperature, and unstable combustion state on the steam state. This achieves continuous and stable output of steam parameters, meeting the stringent requirements for steam quality in various industrial or civil scenarios. In addition, the excess water flow rate can cover the heating demand in real time, fundamentally eliminating the phenomenon of dry burning of the equipment, avoiding damage to the core heating components due to dry burning, extending the overall service life of the equipment, and reducing later maintenance costs and downtime losses.

[0011] 2. By setting up a mixing tank, this utility model can fully mix low-temperature inlet water with high-temperature return water discharged from the water-vapor separator, directly increasing the feed water temperature of the booster pump and reducing the gas consumption of subsequent heating stages. In addition, by recycling the high-temperature return water, the energy consumption per unit of steam is significantly reduced, achieving the goal of energy saving and consumption reduction. Attached Figure Description

[0012] Figure 1 This is the front view of the present invention; Figure 2 This is a schematic diagram of the back of the present invention; Figure 3 This is a bottom view of the present invention; Figure 4 This is a top view of the present invention.

[0013] In the diagram: 1. Frame; 2. Combustion chamber; 3. Combustion fan; 4. Proportional control valve; 5. Secondary heater; 6. Steam outlet pipe; 7. Condenser; 8. Water-vapor separator; 9. Mixing tank; 10. Booster pump; 11. Water flow control valve. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0015] Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely to illustrate some embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0016] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0017] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0018] In the description of this utility model, it should be noted that the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. These terms are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0019] Example 1: As Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, this embodiment proposes a DC inspection-free gas-steam generator, including a frame 1, a combustion chamber 2 at one end of the top of the frame 1, a combustion fan 3 at the air inlet at the top of the combustion chamber 2, and a proportional regulating valve 4 at the air inlet end of the combustion fan 3. A secondary heater 5 is provided at the flue gas output end of the combustion chamber 2, and a condenser 7 is installed at the flue gas output end of the secondary heater 5 on the top of the frame 1. The water outlet of the condenser 7 is connected to the interior of the condenser 7. A water vapor separator 8 is installed at the top of the frame 1 near the combustion chamber 2. The steam output end of the combustion chamber 2 is connected to the steam inlet of the water vapor separator 8. The steam outlet of the water vapor separator 8 is connected to the interior of the secondary heater 5. A steam outlet pipe 6 is provided on the outside of the secondary heater 5. A mixing tank 9 is installed at the top of the frame 1 away from the water vapor separator 8. The drain outlet of the water vapor separator 8 is connected to the return water inlet of the mixing tank 9. A cold water inlet connected to an external low-temperature water source is provided on the side of the mixing tank 9. A booster pump 10 is provided on the side of the mixing tank 9. The input end of the booster pump 10 is connected to the water outlet end of the mixing tank 9. A water flow regulating valve 11 is installed at the output end of the booster pump 10. The water supply end of the water flow regulating valve 11 is connected to the water inlet channel of the combustion chamber 2.

[0020] Working Principle: When the DC inspection-free gas-steam generator is working, it first draws in outside air through the combustion fan 3, while the proportional regulating valve 4 adjusts the gas input according to the steam demand. The gas and air are fully mixed under the action of the combustion fan 3 and then introduced into the combustion chamber 2. Inside the combustion chamber 2, the mixed gas is ignited and combusted, generating high-temperature flue gas and heat. The high-temperature flue gas is directly introduced into the secondary heater 5 at the flue gas output end of the combustion chamber 2, providing the core heating source for the secondary heater 5.

[0021] Meanwhile, the mixing tank 9 connects to an external low-temperature water source through a side cold water inlet. This low-temperature water mixes with the subsequently recycled high-temperature return water and is then pressurized by the booster pump 10 before being pumped to the flow regulating valve 11. The flow regulating valve 11 adjusts the water supply flow rate, delivering the mixed water to the inlet channel of the combustion chamber 2. The mixed water gradually heats up and partially vaporizes within the combustion chamber 2, forming a steam-water mixture. This mixture then passes through the steam output of the combustion chamber 2 and is introduced into the steam inlet of the water-steam separator 8.

[0022] After the steam-water mixture entering the steam-water separator 8 undergoes initial separation, the separated steam is reintroduced into the secondary heater 5 through the steam outlet of the steam-water separator 8 for secondary heating to ensure that the steam quality meets the standards. Finally, the qualified finished steam is discharged from the steam outlet pipe 6 on the outside of the secondary heater 5 for use in various scenarios. The drain outlet of the steam-water separator 8 flows into the mixing tank 9 to achieve water resource recycling. The low-temperature flue gas that has completed heat exchange in the secondary heater 5 is introduced into the condenser 7 at the top of the frame 1. The condenser 7 recovers the waste heat of the flue gas, preheats the water delivered by the booster pump 10, and then introduces it into the combustion chamber 2 to improve energy utilization.

[0023] Example 2: The solution in Example 1 will be further described below with reference to its specific working method. See the description below for details: like Figure 1 As shown, in a preferred embodiment, based on the above method, the water vapor separator 8 is further provided with a water vapor separation component inside. The water vapor separation component is at least one of a baffle plate group, a cyclone separator core, or a wire mesh separation layer, and the water vapor separation component is located between the steam inlet and the steam outlet of the water vapor separator 8.

[0024] Working principle: When the steam-water mixture enters through the steam inlet of the steam-water separator 8, it flows through the steam-water separation component. Through baffle collision, cyclone centrifugation, or wire mesh filtration, the liquid water entrained in the steam is efficiently separated. The separated liquid water flows along the inner wall of the steam-water separator 8 to the bottom drain and merges into the mixing tank 9. The dried steam, after removing the moisture, enters the secondary heater 5 through the steam outlet of the steam-water separator 8, ensuring the dryness and purity of the output steam.

[0025] like Figure 1 As shown, in a preferred embodiment, based on the above method, a temperature sensor is further provided inside the mixing tank 9. The temperature sensor is electrically connected to the water flow regulating valve 11 or the booster pump 10 to adjust the water inlet flow rate or the delivery volume of the booster pump 10 according to the temperature of the mixed water in the mixing tank 9.

[0026] Working principle: The temperature sensor inside the mixing tank 9 monitors the temperature of the mixed water in real time. When the temperature of the mixed water is higher than the preset threshold, the temperature sensor sends a signal to the water flow regulating valve 11 or the booster pump 10 to control the water flow regulating valve 11 to increase the valve opening or control the booster pump 10 to increase the delivery volume and speed up the water supply to reduce the temperature of the mixed water. When the temperature of the mixed water is lower than the preset threshold, the temperature sensor sends a signal to adjust in the opposite direction, reducing the opening of the water flow regulating valve 11 or reducing the delivery volume of the booster pump 10 to slow down the water supply to increase the temperature of the mixed water and ensure stable steam generation efficiency.

[0027] like Figure 1 As shown, in a preferred embodiment, based on the above method, the secondary heater 5 is further configured as a multi-pass spiral tube heat exchanger, with the steam inlet end of the multi-pass spiral tube connected to the steam outlet end of the water-vapor separator 8, and the heat exchange area of ​​the multi-pass spiral tube completely covering the flame radiation range of the combustion chamber 2.

[0028] Working principle: The flame radiation range generated by combustion in combustion chamber 2 completely covers the heat exchange area of ​​the multi-pass spiral tube. The mixed water flows in a multi-pass manner in the spiral tube, which greatly increases the contact area with the high-temperature flue gas, significantly prolongs the contact time, and significantly improves the heat exchange efficiency. It can quickly heat the mixed water to a vaporized state and shorten the steam generation cycle.

[0029] like Figure 1 As shown, in a preferred embodiment, based on the above method, a liquid level sensor is further provided on the side wall of the mixing tank 9. The liquid level sensor is electrically connected to the solenoid valve at the cold water inlet of the mixing tank 9 so as to start water replenishment when the liquid level in the tank is lower than the set value.

[0030] Working principle: When the liquid level is lower than the set lower limit, the liquid level sensor sends a signal to the solenoid valve at the cold water inlet of the mixing tank 9, controlling the solenoid valve to open, and the external low-temperature water source continuously replenishes the mixing tank 9; when the liquid level rises to the set upper limit, the liquid level sensor sends a signal to control the solenoid valve to close, stop water replenishment, ensure that the mixing tank 9 always maintains a sufficient water volume, avoid damage to the booster pump 10 due to dry running, and ensure the stable operation of the water supply circuit.

[0031] like Figure 1 As shown, in a preferred embodiment, based on the above method, the combustion chamber 2 is further provided with an igniter, and the control terminal of the igniter is linked to the start-stop control circuit of the combustion fan 3.

[0032] Working principle: After the combustion fan 3 starts, the igniter will be simultaneously powered on and ignited only after the preset wind speed is reached. After successful ignition, the combustion fan 3 continues to supply air, and the proportional regulating valve 4 continues to supply gas to maintain the combustion state. When the combustion fan 3 stops, the igniter is simultaneously de-energized to prevent gas leakage caused by ignition in the absence of air, thus improving the safety of equipment operation.

[0033] Example 3: The solutions in Example 1 and Example 2 will be further described below with reference to their specific working methods. See the description below for details: After the equipment is started, the combustion fan 3 starts and reaches the preset wind speed, the igniter is simultaneously powered on, and the proportional regulating valve 4 adjusts the gas input as needed. The gas and air are fully combusted in the combustion chamber 2, generating high-temperature flue gas and flame radiant heat. At the same time, the mixing tank 9 maintains a stable liquid level through a level sensor and a solenoid valve. The temperature sensor, in conjunction with the water flow regulating valve 11 and the booster pump 10, delivers the temperature-stable mixed water to the combustion chamber 2. The mixed water and the high-temperature flue gas exchange heat efficiently, vaporizing to form a steam-water mixture.

[0034] The steam-water mixture enters the steam-water separator 8. After the liquid water is removed by the internal steam-water separation component, the dried steam enters the secondary heater 5 for secondary heating to ensure that the steam parameters meet the standards, and is finally output from the steam outlet pipe 6. The separated liquid water flows back to the mixing tank 9 to realize water resource recycling; the low-temperature flue gas discharged from the secondary heater 5 recovers waste heat through the condenser 7, and the water discharged from the booster pump 10 is fed into the combustion chamber 2 to utilize waste heat and reduce heat waste.

[0035] Throughout the entire operation, the water flow regulating valve 11 works in conjunction with the proportional regulating valve 4 to ensure that the water inlet flow of the combustion chamber 2 is always higher than the rated demand, thus completely avoiding the risk of dry burning. At the same time, it reduces the control precision requirements of gas and water flow, is not affected by fluctuations in gas calorific value, feedwater temperature, and combustion state, and continuously outputs stable quality steam, taking into account safety, stability, and energy saving.

[0036] The above description is only a further embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the scope disclosed by the present utility model, based on the technical solution and concept of the present utility model, shall fall within the protection scope of the present utility model.

Claims

1. A DC inspection-free gas-steam generator, comprising a frame (1), characterized in that: A combustion chamber (2) is provided at one end of the top of the frame (1), and a combustion fan (3) is provided at the air inlet at the top of the combustion chamber (2). A proportional regulating valve (4) is provided at the air inlet of the combustion fan (3). A secondary heater (5) is provided at the flue gas output end of the combustion chamber (2), and a condenser (7) is installed at the top of the frame (1) at the flue gas output end of the secondary heater (5). The water outlet end of the condenser (7) is connected to the inside of the combustion chamber (2). A water vapor separator (8) is installed at the top of the frame (1) near the combustion chamber (2). The steam output end of the combustion chamber (2) is connected to the steam inlet of the water vapor separator (8). The steam outlet of the water vapor separator (8) is connected to the interior of the secondary heater (5). A steam outlet pipe (6) is provided on the outside of the secondary heater (5). A mixing tank (9) is installed at the top of the frame (1) away from the water vapor separator (8). The drain outlet of the water vapor separator (8) is connected to the return water inlet of the mixing tank (9). A cold water inlet connected to an external low-temperature water source is provided on the side of the mixing tank (9). A booster pump (10) is provided on the side of the mixing tank (9). The input end of the booster pump (10) is connected to the water outlet of the mixing tank (9). A water flow regulating valve (11) is installed at the output end of the booster pump (10). The water supply end of the water flow regulating valve (11) is connected to the water inlet channel of the condenser (7).

2. The DC inspection-free gas-steam generator according to claim 1, characterized in that: The steam-water separation tank (8) is equipped with a steam-water separation component inside. The steam-water separation component is at least one of a baffle plate group, a cyclone separator core, or a wire mesh separation layer, and the steam-water separation component is located between the steam inlet and the steam outlet of the steam-water separation tank (8).

3. A DC inspection-free gas-steam generator according to claim 1, characterized in that: The mixing tank (9) is equipped with a temperature sensor, which is electrically connected to the water flow regulating valve (11) or the booster pump (10) to adjust the inlet water flow or the delivery volume of the booster pump (10) according to the temperature of the mixed water in the mixing tank (9).

4. A DC inspection-free gas-steam generator according to claim 1, characterized in that: The secondary heater (5) is a multi-pass spiral tube heat exchanger. The steam inlet of the multi-pass spiral tube is connected to the steam outlet of the water-steam separator (8). The heat exchange area of ​​the multi-pass spiral tube completely covers the flame radiation range of the combustion chamber (2).

5. A DC inspection-free gas-steam generator according to claim 1, characterized in that: A liquid level sensor is provided on the side wall of the mixing tank (9). The liquid level sensor is electrically connected to the solenoid valve at the cold water inlet of the mixing tank (9) so as to open the water supply when the liquid level in the tank is lower than the set value.

6. A DC inspection-free gas-steam generator according to claim 1, characterized in that: An igniter is installed inside the combustion chamber (2), and the control terminal of the igniter is linked to the start-stop control circuit of the combustion fan (3).

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