Low-pressure high-temperature steam generator furnace body

Abstract

A low-pressure high-temperature steam generator furnace body comprises a furnace body, a tube-sheet heat exchanger is fixedly installed in the furnace body, an upper smoke chamber is arranged above a smoke tube of the tube-sheet heat exchanger, a lower smoke chamber is arranged below the smoke tube of the tube-sheet heat exchanger, furnace body walls on the upper portion and the lower portion of the tube-sheet heat exchanger are interlayers, and the interlayers are communicated with the periphery of the smoke tube of the tube-sheet heat exchanger. A high-temperature flue gas heat exchanger is fixedly installed beside the boiler body, a steam heat exchange pipe which is bent in a reciprocating mode in the left-right direction is installed on the high-temperature flue gas heat exchanger, the steam inlet end of the steam heat exchange pipe is communicated with an upper smoke chamber through a steam collecting chamber on the upper portion of the boiler body and a flue gas inlet of the high-temperature flue gas heat exchanger, and a flue gas outlet of the high-temperature flue gas heat exchanger is communicated with a flue gas inlet of a condenser. The condenser is provided with a smoke exhaust port, a heat exchange water pipe which is bent in a reciprocating mode in the left-right direction is installed on the condenser, a water inlet of the steam generator is connected to the water inlet end of the heat exchange water pipe, the water outlet end of the heat exchange water pipe is connected into an interlayer of the boiler body wall through a pipeline, and the boiler body is good in safety.

Description

Technical Field

[0001] The utility model relates to a steam generator, in particular to a furnace body of a low-pressure high-temperature steam generator, belonging to the technical field of heat exchange equipment. Background Art

[0002] Small-tonnage steam generators are widely used in industrial and agricultural occasions with decentralized production. Currently, steam generators generally consist of a furnace body and a condenser. After the high-temperature flue gas exchanges heat in the furnace body, water is turned into steam and output. Generally, a reciprocally bent heat exchange water pipe is installed on the condenser. The water inlet of the steam generator enters from the heat exchange water pipe, is preheated and then enters the furnace body. The flue gas is output after exchanging heat in the condenser. In many occasions, low-pressure high-temperature steam is required. Currently, many steam generators cannot output low-pressure high-temperature steam. CN219036586U discloses a furnace body of a low-pressure high-temperature horizontal steam generator, but it is used for a horizontal furnace body, with a large volume and a relatively large steam drum required. The relatively large steam drum is the key point of safety monitoring. The heat exchange furnace body structure of a low-pressure high-temperature steam generator disclosed in CN219955289U also has the above problems. Summary of the Invention

[0003] The purpose of the utility model is to provide a furnace body of a low-pressure high-temperature steam generator.

[0004] To achieve the purpose of the utility model, the following technical solution is adopted: A furnace body of a low-pressure high-temperature steam generator includes a furnace body. There is a flue gas inlet at the lower part of the front end of the furnace body. A vertically installed tube-sheet heat exchanger is fixedly installed in the furnace body. The upper part above the flue gas tubes of the tube-sheet heat exchanger is an upper flue gas chamber, and the lower part is a lower flue gas chamber. The furnace body walls above and below the tube-sheet heat exchanger are both interlayers, and the interlayers communicate with the periphery of the flue gas tubes of the tube-sheet heat exchanger. There is a steam collecting chamber in the furnace body above the interlayer. A high-temperature flue gas heat exchanger is fixedly installed beside the furnace body. A steam heat exchange tube that reciprocally bends in the left-right direction is installed on the high-temperature flue gas heat exchanger. The steam inlet end of the steam heat exchange tube is connected to the steam collecting chamber at the upper part of the furnace body through a pipeline. The flue gas inlet of the high-temperature flue gas heat exchanger communicates with the upper flue gas chamber, and the flue gas outlet is connected to the flue gas inlet of the condenser. The condenser has a flue gas discharge port. A heat exchange water pipe that reciprocally bends in the left-right direction is installed on the condenser. The water inlet of the steam generator is connected to the water inlet end of the heat exchange water pipe. The water outlet end of the heat exchange water pipe is connected to the interlayer of the furnace body wall through a pipeline. There is a liquid level gauge installation pipe on the furnace body.

[0005] Furthermore, a gas blocking piece is fixedly installed in the upper part inside the flue gas tubes of the tube-sheet heat exchanger. A plurality of windows are opened on the gas blocking piece. An inclined downward baffle is fixedly connected to the upper part of each window. The baffles on two adjacent windows are respectively located on both sides of the gas blocking piece.

[0006] Furthermore, the flue gas outlet of the upper flue gas chamber is located on the rear side wall, and there is a first furnace door at the top of the upper flue gas chamber.

[0007] Furthermore, there is a second furnace door opening at the lower part of the side wall of the furnace body, and a third furnace door opening at the sub-lower part of the junction of the high-temperature flue gas heat exchanger and the condenser.

[0008] Furthermore, the high-temperature flue gas heat exchanger and the condenser are integrated, and are separated by a partition inside. There is a flue gas passing gap between the lower end of the partition and the bottom. The gap is the flue gas outlet of the high-temperature flue gas heat exchanger and at the same time is the inlet flue gas port of the condenser.

[0009] The purpose of the present utility model is as follows: The furnace body of the present furnace is vertical, with a small floor area, fast steam generation, a small steam capacity inside the furnace, good safety, and the steam can form low-pressure high-temperature steam (pressure less than 0.1 Mpa, steam temperature between 125 - 400 degrees Celsius) after passing through the high-temperature flue gas heat exchanger, meeting the requirements for such steam in the production site. Description of the Drawings

[0010] Figure 1 is one of the overall schematic diagrams of the present utility model.

[0011] Figure 2 is the second overall schematic diagram of the present utility model.

[0012] Figure 3 is the internal schematic diagram of the present utility model.

[0013] Figure 4 is the schematic diagram of the gas blocking piece. Detailed Embodiments

[0014] In order to more fully explain the implementation of the present utility model, implementation examples of the present utility model are provided. These implementation examples are only for the elaboration of the present utility model and do not limit the scope of the present utility model.

[0015] The present utility model is further explained in detail in conjunction with the drawings. The marks in the drawings are as follows: 1: furnace body; 2: flue gas inlet; 3: first furnace door opening; 4: second furnace door opening; 5: high-temperature flue gas heat exchanger; 6: steam heat exchange tube; 7: condenser; 8: hot water exchange tube; 9: connecting pipeline between the hot water exchange tube and the interlayer of the furnace body; 10: third furnace door opening; 11: steam outlet pipe; 12: liquid level gauge installation pipe; 13: connecting pipeline between the steam collecting chamber and the steam heat exchange tube; 14: tube-and-shell heat exchanger; 15: smoke tube; 16: gas blocking piece; 17: lower smoke chamber; 18: upper smoke chamber; 19: interlayer; 20: steam collecting chamber; 21: partition; 22: gap; 23: flue gas exhaust port.

[0016] As shown in the attached drawings, a fuel and gas low-pressure high-temperature steam generator furnace body includes a furnace body 1. At the lower part of the front end of the furnace body, there is a smoke inlet 2. Inside the furnace body, a vertically installed tube plate heat exchanger 14 is fixedly installed. Above the smoke tubes of the tube plate heat exchanger is an upper smoke chamber 18, and below is a lower smoke chamber 17. The smoke outlet of the upper smoke chamber is located on the rear side wall. At the top of the upper smoke chamber, there is a first furnace door 3. The furnace body walls above and below the tube plate heat exchanger are both sandwich layers, as shown at 19. The sandwich layer communicates with the periphery of the smoke tubes of the tube plate heat exchanger. Water or steam is located around the sandwich layer and the heat exchange tubes. In this embodiment, a gas blocking piece 16 is fixedly installed in the upper part of the smoke tubes of the tube plate heat exchanger. A plurality of windows 1601 are provided on the gas blocking piece. An inclined downward baffle 1602 is fixedly connected to the upper part of each window. The baffles on two adjacent windows are respectively located on both sides of the gas blocking piece. The gas blocking piece can extend the flow time of the flue gas and improve the heat exchange effect.

[0017] Inside the furnace body above the sandwich layer, there is a steam collecting chamber 20. A high-temperature flue gas heat exchanger 5 is fixedly installed beside the furnace body. A steam heat exchange tube 6 that reciprocally bends in the left-right direction is installed on the high-temperature flue gas heat exchanger. The steam inlet end of the steam heat exchange tube 6 is connected to the steam collecting chamber at the upper part of the furnace body through a pipeline. As shown at 13, it is the connecting pipeline between the steam collecting chamber and the steam heat exchange tube. The flue gas inlet of the high-temperature flue gas heat exchanger communicates with the upper smoke chamber 18, and the flue gas outlet is connected to the flue gas inlet of the condenser 7. In this embodiment, the high-temperature flue gas heat exchanger and the condenser are integrated and separated by a partition plate 21 inside. There is a smoke passing gap 22 between the lower end of the partition plate and the bottom. The gap is the flue gas outlet of the high-temperature flue gas heat exchanger and at the same time the flue gas inlet of the condenser. At the lower part of the side wall of the furnace body, there is a second furnace door 4. At the lower part of the junction between the high-temperature flue gas heat exchanger and the condenser, there is a third furnace door 10.

[0018] The condenser is provided with a flue gas discharge port 23. A water heat exchange tube 8 that reciprocally bends in the left-right direction is installed on the condenser. The water inlet of the steam generator is connected to the water inlet end of the water heat exchange tube 8. The water outlet end of the water heat exchange tube 8 is connected to the inside of the sandwich layer of the furnace body wall through a pipeline. As shown at 9, it is the connecting pipeline between the water heat exchange tube and the furnace body sandwich layer. A liquid level gauge installation pipe 12 is provided on the furnace body.

[0019] This furnace body takes in water from the water heat exchange tube on the condenser. After preheating, the water enters the sandwich layer of the furnace body, exchanges heat with the flue gas to form steam, which enters the steam collecting chamber from the sandwich layer, and then the steam collecting chamber enters the steam heat exchange tube on the high-temperature flue gas heat exchanger to output low-pressure high-temperature steam. The flue gas passes through the lower smoke chamber, the smoke tubes of the tube plate heat exchanger, the upper smoke chamber, the high-temperature flue gas heat exchanger, the condenser, and the flue gas discharge port.

[0020] This furnace body can be adapted to burners for various fuels, such as fuel oil, gas, methanol, biomass, coal, wood blocks, etc.

[0021] After the embodiments of the present utility model are described in detail, those skilled in the art can clearly understand that various changes and modifications can be made without departing from the scope and spirit of the above-mentioned patent application. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model all belong to the scope of the technical solution of the present utility model, and the present utility model is not limited to the embodiments described in the specification either.

Claims

1. A low-pressure and high-temperature steam generator furnace body, including a furnace body, has a smoke inlet at the lower part of the front end of the furnace body. A vertically installed tube-and-plate heat exchanger is fixedly installed in the furnace body. Above the smoke tubes of the tube-and-plate heat exchanger is an upper smoke chamber, and below is a lower smoke chamber. The furnace body walls above and below the tube-and-plate heat exchanger are both interlayers, and the interlayers communicate with the periphery of the smoke tubes of the tube-and-plate heat exchanger. There is a steam collecting chamber in the furnace body above the interlayer. It is characterized in that: A high-temperature flue gas heat exchanger is fixedly installed beside the furnace body. A steam heat exchange tube that bends back and forth in the left-right direction is installed on the high-temperature flue gas heat exchanger. The steam inlet end of the steam heat exchange tube is connected to the steam collecting chamber at the upper part of the furnace body through a pipeline. The flue gas inlet of the high-temperature flue gas heat exchanger communicates with the upper flue chamber, and the flue gas outlet is connected to the flue gas inlet of the condenser. The condenser has a flue gas discharge port. A heat exchange water pipe that bends back and forth in the left-right direction is installed on the condenser. The water inlet of the steam generator is connected to the water inlet end of the heat exchange water pipe, and the water outlet end of the heat exchange water pipe is connected to the interlayer of the furnace body wall through a pipeline. A liquid level gauge installation pipe is provided on the furnace body.

2. The furnace body of a low-pressure high-temperature steam generator according to claim 1, characterized in that: Blocking pieces are fixedly installed at the upper part inside the flue tubes of the tube-and-plate heat exchanger. A plurality of windows are formed in the blocking pieces. An inclined downward baffle is fixedly connected to the upper part of each window. The baffles on two adjacent windows are respectively located on both sides of the blocking piece.

3. A low-pressure high-temperature steam generator furnace body according to claim 1, characterized in that: The flue gas outlet of the upper flue chamber is located on the rear side wall, and a first furnace door is provided at the top of the upper flue chamber.

4. A low-pressure high-temperature steam generator furnace body according to claim 1, characterized in that: A second furnace door is provided at the lower part of the furnace body side wall, and a third furnace door is provided at the lower part of the junction between the high-temperature flue gas heat exchanger and the condenser.

5. A low-pressure high-temperature steam generator furnace body according to claim 1, characterized in that: The high-temperature flue gas heat exchanger and the condenser are integrated and separated by a partition inside. There is a flue gas passing gap between the lower end of the partition and the bottom. The gap is the flue gas outlet of the high-temperature flue gas heat exchanger and also the flue gas inlet of the condenser.

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