A once-through steam generator for separating water without power recycling

Abstract

A direct current steam generator for separating water and recycling it without power relates to the technical field of steam generators. It includes a main shell, a combustion chamber, an air cavity, an evaporation section, a separation and pressure stabilization section, a preheating section, and a liquid level gauge. The separation and pressure stabilization section is a hollow cavity structure. The separation and pressure stabilization section is located in the middle of the main shell and divides the main shell into two parts, the upper part of the separation and pressure stabilization section is the evaporation section, and the lower part of the separation and pressure stabilization section is the preheating section. A fire pipe connecting the evaporation section and the preheating section is provided inside the separation and pressure stabilization section. The air cavity is provided at the top of the main shell, the lower part of the air cavity is provided with a combustion chamber, and the bottom of the main shell is provided with a flue gas outlet. The evaporation section is provided with an upper section of finned tubes, and the preheating section is provided with a lower section of finned tubes. The steam quality of the present invention is adjustable. Saturated steam, dry steam, and superheated steam can be generated according to usage requirements. The separation and pressure stabilization section can be recycled without power and can meet the needs of steam users who use steam in a closed cycle under pressure.

Description

Technical Field

[0001] The invention relates to the technical field of steam generators, in particular to a separated water unpowered recycling direct current steam generator. Background Art

[0002] Traditional once-through steam generators use feedwater pumps to recycle the separated water after steam-water separation. However, the separated water is typically hot, which degrades the operating conditions of the feedwater pumps, often causing them to break down and prevent the system from functioning properly for extended periods. Furthermore, for users of pressurized, closed-loop steam, traditional once-through steam generators cannot meet these requirements, as the temperature of the recycled steam-water mixture often exceeds 100°C. Summary of the Invention

[0003] In order to overcome the shortcomings of the above-mentioned prior art, the purpose of the present invention is to provide a direct current steam generator for separating water and recycling without power, the steam quality of which is adjustable, and saturated steam, dry steam and superheated steam can be generated according to usage requirements, and the separation water can be recycled without power, while meeting the needs of steam users for pressurized closed circulation.

[0004] In order to solve the above problems, the present invention adopts the following technical solution: a separated water unpowered reuse once-through steam generator, which is characterized by comprising a main shell, a combustion chamber, an air cavity, an evaporation section, a separation and pressure stabilization section and a preheating section, and a liquid level gauge.

[0005] The separation and pressure stabilization section is a hollow cavity structure. The separation and pressure stabilization section is located in the middle of the main shell. The separation and pressure stabilization section divides the main shell into two parts, the upper part of the separation and pressure stabilization section is the evaporation section, and the lower part of the separation and pressure stabilization section is the preheating section. The interior of the separation and pressure stabilization section is provided with a fire pipe connecting the evaporation section and the preheating section.

[0006] The air cavity is set at the top of the main shell, and a combustion chamber is set below the air cavity. A flue gas outlet is set at the bottom of the main shell. The high-temperature flue gas in the combustion chamber flows downward from the combustion chamber through the evaporation section, fire tube, and preheating section in sequence and is discharged from the flue gas outlet.

[0007] The evaporation section is provided with an upper section of finned tubes, the preheating section is provided with a lower section of finned tubes, and the upper section of finned tubes and the lower section of finned tubes are connected by a connecting pipe.

[0008] The water supply inlet is set at the lower part of the main shell, and the water supply inlet is connected to the inlet of the lower section of the finned tube.

[0009] The outlet of the upper finned tube is connected to the inner cavity of the separation and pressure stabilization section through a connecting pipe.

[0010] The liquid level gauge is located on the separation and pressure stabilization section.

[0011] The steam outlet is connected to the internal cavity of the separation and pressure stabilization section.

[0012] The separation and pressure stabilization section is provided with a water recycling interface.

[0013] The fire tube is a vertically arranged circular tube, the upper end opening of which is connected to the evaporation section, and the lower end opening of which is connected to the preheating section.

[0014] The beneficial effects of the present invention are:

[0015] 1. The steam quality is adjustable. It can generate saturated steam, dry steam and superheated steam according to the use requirements. The separated water can be reused without power. At the same time, it can meet the needs of steam users who use it in a closed cycle under pressure.

[0016] 2. The high-temperature flue gas in the combustion chamber flows downward from the combustion chamber through the evaporation section, fire tube, and preheating section in sequence before being discharged from the flue gas outlet. This structural design allows the flue gas to flow from top to bottom. The preheating section preheats the water entering the water inlet before the flue gas is discharged, making full use of the heat energy and reducing power consumption.

[0017] 3. The separation and stabilization section has a hollow cavity structure, and the outlet of the upper finned tubes is connected to the internal cavity of the separation and stabilization section through a connecting pipe. Traditional direct current steam generators do not have a separation and stabilization section. Due to the different heating and positions inside the finned tubes, the pressure inside the finned tubes at different positions is different, resulting in unstable steam generation pressure. In addition, after the steam in the upper finned tubes enters the separation and stabilization section, the pressure inside the separation and stabilization section is stable due to its hollow cavity structure. The liquid level can be adjusted by a liquid level gauge, allowing free control of steam quality to produce saturated steam, dry steam, or superheated steam. At the same time, the stable pressure in the separation and stabilization section allows the separation water to flow back unpowered for reheating, reducing the failure rate and increasing the service life.

[0018] 4. The fire tube is a vertically arranged circular tube. This structure ensures that the pressure inside the cavity of the separation and pressure stabilization section is balanced. At the same time, the flue gas passing through the fire tube can heat the separation and pressure stabilization section again, while ensuring the connectivity between the evaporation section and the preheating section. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0020] Figure 1 It is a structural schematic diagram of the present invention;

[0021] In the figure: 1 air cavity; 2 combustion chamber; 3 evaporation section; 31 upper finned tube; 4 separation and pressure stabilization section; 5 fire tube; 6 preheating section; 61 lower finned tube; 7 main shell; 8 feed water inlet; 9 separation water interface; 10 return water interface, 11 steam outlet, 12 liquid level gauge. DETAILED DESCRIPTION

[0022] like Figure 1 As shown, a separated water unpowered reuse once-through steam generator includes a main shell 7, a combustion chamber 2, an air cavity 1, an evaporation section 3, a separation and pressure stabilization section 4 and a preheating section 6, and a liquid level meter 12.

[0023] The separation and pressure-stabilizing section 4 is a hollow cavity structure. The separation and pressure-stabilizing section 4 is arranged in the middle of the main shell 7. The separation and pressure-stabilizing section 4 divides the main shell 7 into two parts, the upper part of the separation and pressure-stabilizing section 4 is the evaporation section 3, and the lower part of the separation and pressure-stabilizing section 4 is the preheating section 6. The interior of the separation and pressure-stabilizing section 4 is provided with a fire tube 5 connecting the evaporation section 3 and the preheating section 6.

[0024] The air cavity 1 is arranged at the top of the main shell 7, and a combustion chamber 2 is provided below the air cavity 1. A flue gas outlet is provided at the bottom of the main shell 7. The high-temperature flue gas in the combustion chamber 2 flows downward from the combustion chamber 2 through the evaporation section 3, the fire tube 5, and the preheating section 6 in sequence and is discharged from the flue gas outlet.

[0025] An upper section of finned tubes 31 is provided in the evaporation section 3 , and a lower section of finned tubes 61 is provided in the preheating section 6 . The upper section of finned tubes 31 and the lower section of finned tubes 61 are connected via a connecting pipe.

[0026] The water supply inlet 8 is provided at the lower portion of the main housing 7 , and the water supply inlet 8 is communicated with the inlet of the lower section of the finned tubes 61 .

[0027] The outlet of the upper finned tube array 31 is connected to the inner cavity of the separation and pressure stabilization section 4 through a connecting pipe.

[0028] The liquid level meter 12 is provided on the separation and pressure stabilization section 4 .

[0029] The steam outlet 11 is communicated with the inner cavity of the separation and pressure stabilization section 4 .

[0030] The separation and pressure stabilization section 4 is provided with a recycled water interface 10 .

[0031] The separation and pressure stabilization section 4 is provided with a separation water interface 9 .

[0032] The fire tube 5 is a vertically arranged circular tube, the upper end opening of which is connected to the evaporation section 3 , and the lower end opening of which is connected to the preheating section 6 .

[0033] The present invention is not limited only to the above-described embodiments.

Claims

1. A once-through steam generator for separating water without power recycling, characterized in that: It includes the main shell, combustion chamber, air cavity, evaporation section, separation and pressure stabilization section, preheating section, and liquid level gauge. The separation and pressure stabilization section is a hollow cavity structure. The separation and pressure stabilization section is located in the middle of the main shell. The separation and pressure stabilization section divides the main shell into two parts, the upper part of the separation and pressure stabilization section is the evaporation section, and the lower part of the separation and pressure stabilization section is the preheating section. The interior of the separation and pressure stabilization section is provided with a fire pipe connecting the evaporation section and the preheating section. The air cavity is set at the top of the main shell, and a combustion chamber is set below the air cavity. A flue gas outlet is set at the bottom of the main shell. The high-temperature flue gas in the combustion chamber flows downward from the combustion chamber through the evaporation section, fire tube, and preheating section in sequence and is discharged from the flue gas outlet. The evaporation section is provided with an upper section of finned tubes, the preheating section is provided with a lower section of finned tubes, and the upper section of finned tubes and the lower section of finned tubes are connected by a connecting pipe. The water supply inlet is set at the lower part of the main shell, and the water supply inlet is connected to the inlet of the lower section of the finned tube. The outlet of the upper finned tube is connected to the inner cavity of the separation and pressure stabilization section through a connecting pipe. The liquid level gauge is located on the separation and pressure stabilization section. The steam outlet is connected to the internal cavity of the separation and pressure stabilization section. The separation and pressure stabilization section is provided with a recycled water interface, and the fire tube is a vertically arranged circular tube, the upper end opening of which is connected to the evaporation section, and the lower end opening of which is connected to the preheating section.

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