A new type of air humidifying superheater

Abstract

The present invention relates to a novel air humidifying superheater, comprising a heating furnace body, characterized in that: a partition wall is arranged inside the furnace cavity of the heating furnace body, the partition wall divides the furnace body into a smoke inlet cavity and a smoke outlet cavity, a smoke inlet section is arranged at the front end of the smoke inlet cavity, a smoke outlet section is arranged at the front end of the smoke outlet cavity, the smoke inlet cavity and the smoke outlet cavity are connected to each other at the rear end to form an evaporation section, an evaporator is arranged in the evaporation section, an air preheating section is formed in the area between the evaporation section and the smoke outlet section, a preheating heat exchange pipe is arranged in the air preheating section, a superheating section and a second superheating section are formed between the evaporation section and the smoke inlet section, and a first heating heat exchange pipe and a second heating heat exchange pipe are respectively installed in the first superheating section and the second superheating section. The present invention has the advantages of simple structure, small size, convenient maintenance, reduced maintenance cost, high thermal efficiency, ability to heat water, and easy implementation.

Description

Technical Field

[0001] The invention relates to industrial heating equipment, in particular to a novel air humidifying superheater. Background Art

[0002] In the processing of galvanized steel pipes, superheated steam is used to purge the galvanized steel pipes. At present, there are two ways to generate superheated steam, one is to heat it through a boiler, and the other is to use the waste heat of flue gas. The former method consumes more energy and has a higher cost; the latter method realizes the recycling of heat resources, which can greatly reduce the cost of enterprises, and therefore is widely used.

[0003] The existing device for humidifying and superheating air by utilizing the waste heat of flue gas is generally composed of a heating furnace body and an air heating pipe. The heating furnace body is provided with a smoke inlet chamber, a heating chamber and a smoke outlet. The heating chamber is provided with multiple stages of heat exchange pipes for heating cold air. Since the heat exchange pipes at each stage are connected by welding, when there are problems such as leakage in the pipes, they need to be completely removed and replaced, which is extremely inconvenient for maintenance and increases the cost of the enterprise. At the same time, the smoke outlet of the existing air humidification and superheating device is arranged outside the furnace body, that is, when in use, an additional smoke outlet channel needs to be arranged at the smoke outlet, which is not only inconvenient to use, but also causes the loss of heat from the flue gas. Summary of the invention

[0004] The object of the present invention is to provide a novel air humidifying superheater which has a scientific and reasonable structural design, a simple structure, convenient maintenance, reduced maintenance cost, high thermal efficiency and is easy to implement.

[0005] The present invention solves the technical problem by the following technical solutions:

[0006] A novel air humidifying superheater comprises a heating furnace body, characterized in that: a partition wall is arranged inside the furnace chamber of the heating furnace body along its length direction, the partition wall divides the furnace body into a smoke inlet chamber on one side and a smoke outlet chamber on the other side, a smoke inlet section is arranged at the front end of the smoke inlet chamber, a smoke outlet section is arranged at the front end of the smoke outlet chamber, the smoke inlet chamber and the smoke outlet chamber are connected to each other at the rear ends to form an evaporation section, an evaporator is arranged in the evaporation section, an air preheating section is formed in the area between the evaporation section and the smoke outlet section, a preheating heat exchange pipe is arranged in the air preheating section, and a preheating heat exchange pipe is arranged between the evaporation section and the smoke inlet section. The area between the air sections forms a superheating section 1 and a superheating section 2 from front to back, and a first heating heat exchange tube and a second heating heat exchange tube are installed in the superheating section 1 and the superheating section 2 respectively. The upper end of the preheating heat exchange tube forms a cold air inlet, the lower end of the preheating heat exchange tube is connected to the air inlet cavity tube at the lower end of the evaporator through a U-shaped tube, the mixed gas cavity tube at the upper end of the evaporator is connected to one tube opening of the second heat exchange tube through a U-shaped tube, the other tube opening of the second heat exchange tube is connected to one tube opening of the first heat exchange tube through a U-shaped tube, and the other tube opening of the first heat exchange tube forms a superheated steam outlet.

[0007] Moreover, the evaporator is composed of a mixing gas chamber, an air intake chamber, a water spray chamber, an evaporation tube, fins and a downcomer. The mixing gas chamber and the air intake chamber are arranged opposite to each other in upper and lower directions. A water spray chamber is arranged between the mixing gas chamber and the air intake chamber. A downcomer is arranged between the mixing gas chamber and the water spray chamber and between the water spray chamber and the air intake chamber. Evaporation tubes connecting the mixing gas chamber and the water spray chamber and the water spray chamber and the air intake chamber are arranged on both sides of each downcomer. Evaporation tubes are installed on both sides of the mixing gas chamber and the air intake chamber, and fins are arranged on each of the evaporation tubes and the downcomers.

[0008] Moreover, it also includes a water heater. A water heating section is provided between the smoke outlet section and the air preheating section, and a water heater is provided in the water heating section.

[0009] Moreover, the water heater is composed of an upper water supply tank, a lower water supply tank, fin tubes, a water inlet pipe, a water outlet pipe and a return pipe. The upper water supply tank and the lower water supply tank are arranged opposite to each other in upper and lower directions. Fin tubes are arranged between the upper water supply tank and the lower water supply tank. The upper water supply tank is provided with a water inlet pipe and a water outlet pipe, and the lower water supply tank is provided with a return pipe connected to the water inlet pipe.

[0010] Moreover, the bottoms of the upper water supply tank and the lower water supply tank are arc-shaped structures.

[0011] The advantages and beneficial effects of the present invention are:

[0012] 1. The new air humidifying superheater is designed to fully utilize the heat of the flue gas and improve the thermal efficiency by designing the flue gas inlet and outlet inside the furnace body. In addition, by designing the existing integrally welded heat exchange tubes to be connected by U-shaped tubes, the layout is modularized, which is convenient for installation, disassembly and maintenance. When repairing, the damaged module can be replaced, which greatly reduces the maintenance cost and is conducive to mass production.

[0013] 2. The new air humidifying superheater improves efficiency through the design of air preheating section, evaporation section, superheating section one and superheating section two.

[0014] 3. The novel air humidifying superheater has a water heating function by designing a water heater in the furnace body, so that the waste heat of the flue gas is further utilized.

[0015] 4. The novel air humidifying superheater enhances its pressure bearing capacity and effectively disperses local stress by designing the upper water supply tank and the lower water supply tank of the water heater to have an arc-shaped bottom surface.

[0016] 5. The structural design of the present invention is scientific and reasonable, and has the advantages of simple structure, small size, convenient maintenance, reduced maintenance cost, high thermal efficiency, ability to heat water, and easy implementation. It is a new type of air humidifying superheater with high innovation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram (cross-sectional view) of the present invention;

[0018] Figure 2 for Figure 1 Rear view (sectional view);

[0019] Figure 3 for Figure 1 A top view (cross-sectional view);

[0020] Figure 4 It is a schematic diagram of the structure of the evaporator of the present invention (with fins omitted);

[0021] Figure 5 It is a schematic diagram of the structure of the water heater of the present invention (the return pipe is omitted);

[0022] Figure 6 for Figure 5 Side view of.

[0023] Reference numerals

[0024] 1-smoke inlet chamber, 2-superheated steam outlet, 3-first stage heating heat exchange tube, 4-second stage heating heat exchange tube, 5-evaporator, 6-water heater, 7-cold air inlet, 8-preheating heat exchange tube, 9-smoke outlet chamber, 10-smoke outlet smoke section, 11-water outlet pipe, 12-water inlet pipe, 13-smoke inlet smoke section, 14-U-shaped tube, 15-mixed gas chamber outlet, 16-down pipe, 17-evaporation tube, 18-water spray chamber, 19-inlet chamber outlet, 20-upper water supply tank, 21-fin tube, 22-return pipe, 23-lower water supply tank. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below through specific examples. The following examples are only illustrative and not restrictive, and the protection scope of the present invention cannot be limited thereto.

[0026] A novel air humidifying superheater comprises a heating furnace body, wherein the innovation lies in that a partition wall is arranged inside the furnace chamber of the heating furnace body along its length direction, the partition wall divides the furnace body into a smoke inlet chamber 1 on one side and a smoke outlet chamber 9 on the other side, a smoke inlet section 13 is arranged at the front end of the smoke inlet chamber, a smoke outlet section 10 is arranged at the front end of the smoke outlet chamber, the smoke inlet chamber and the smoke outlet chamber are connected to each other at the rear ends to form an evaporation section, an evaporator 5 is arranged in the evaporation section, an air preheating section is formed in the area between the evaporation section and the smoke outlet section, a preheating heat exchange pipe 8 is arranged in the air preheating section, and a preheating heat exchange pipe 8 is arranged between the evaporation section and the smoke inlet section. The area between the gas sections forms a superheating section 1 and a superheating section 2 from front to back, and a heating heat exchange tube 3 and a heating heat exchange tube 4 are installed in the superheating section 1 and the superheating section 2 respectively. The upper end of the preheating heat exchange tube forms a cold air inlet 7, and the lower end of the preheating heat exchange tube is connected to the air inlet cavity tube 19 at the lower end of the evaporator through a U-shaped tube 14. The mixed gas cavity tube 15 at the upper end of the evaporator is connected to one tube opening of the second section heat exchange tube through a U-shaped tube, and the other tube opening of the second section heat exchange tube is connected to one tube opening of the first section heat exchange tube through a U-shaped tube. The other tube opening of the first section heat exchange tube forms a superheated steam outlet 2. The two end tube openings of the U-shaped tube are connected to the tube openings of each heat exchanger or evaporator through flanges.

[0027] The evaporator is composed of a mixing gas chamber, an air intake chamber, a water spray chamber 18, an evaporation tube 17, fins and a downcomer 16. The mixing gas chamber and the air intake chamber are arranged opposite to each other in upper and lower directions. A water spray chamber is arranged between the mixing gas chamber and the air intake chamber. A downcomer is arranged between the mixing gas chamber and the water spray chamber and between the water spray chamber and the air intake chamber. Evaporation tubes connecting the mixing gas chamber and the water spray chamber and the water spray chamber and the air intake chamber are arranged on both sides of each downcomer. Evaporation tubes are installed on both sides of the mixing gas chamber and the air intake chamber, and fins are arranged on each of the evaporation tubes and downcomers.

[0028] It also includes a water heater 6. A water heating section is provided between the smoke outlet section and the air preheating section, and a water heater is provided in the water heating section.

[0029] The water heater is composed of an upper water supply tank 20, a lower water supply tank 23, finned tubes 21, an inlet pipe 12, an outlet pipe 11 and a return pipe 22. The upper water supply tank and the lower water supply tank are arranged opposite to each other in upper and lower directions, and finned tubes are arranged between the upper water supply tank and the lower water supply tank. The upper water supply tank is provided with an inlet pipe and an outlet pipe, and the lower water supply tank is provided with a return pipe connected to the inlet pipe.

[0030] The bottoms of the upper water supply tank and the lower water supply tank are arc-shaped structures.

[0031] The heat exchange tubes are all serpentine tubes.

[0032] A heat-insulating layer is arranged on the inner wall of the furnace cavity of the heating furnace body.

[0033] When in use, the smoke enters from the opening at the smoke inlet chamber, follows the smoke duct of the smoke inlet chamber, passes through the superheating section, the second superheating section, the evaporation section, the air preheating section, the water heating section and the smoke outlet section in sequence, and is discharged from the opening at the smoke outlet chamber, thereby heating each heat exchange tube in the furnace body, thereby heating the steam in the heat exchange tube; cold air enters from the cold air inlet at the air preheating section, is humidified through the evaporation section, and then passes through the second hot section and the first superheating section in sequence, and is discharged from the superheated steam outlet. The present invention can simultaneously realize the humidification and superheating of air and the water heating functions, making full use of the preheated smoke.

[0034] Although the embodiments and drawings of the present invention are disclosed for illustrative purposes, those skilled in the art will appreciate that various substitutions, changes and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. A novel air humidifying superheater, comprising a heating furnace body, characterized in that: A partition wall is arranged inside the furnace chamber of the heating furnace body along its length direction, and the partition wall divides the furnace body into a smoke inlet chamber on one side and a smoke outlet chamber on the other side. A smoke inlet section is arranged at the front end of the smoke inlet chamber, and a smoke outlet section is arranged at the front end of the smoke outlet chamber. The rear ends of the smoke inlet chamber and the smoke outlet chamber are connected to each other to form an evaporation section. An evaporator is arranged in the evaporation section. An air preheating section is formed in the area between the evaporation section and the smoke outlet section. A preheating heat exchange pipe is arranged in the air preheating section. The area between the evaporation section and the smoke inlet section is arranged from front to back in accordance with The first and second superheating sections are formed, and a first heating heat exchange tube and a second heating heat exchange tube are installed in the first and second superheating sections respectively. The upper end of the preheating heat exchange tube forms a cold air inlet, and the lower end of the preheating heat exchange tube is connected to the air inlet cavity tube at the lower end of the evaporator through a U-shaped tube. The mixed gas cavity tube at the upper end of the evaporator is connected to one tube opening of the second heat exchange tube through a U-shaped tube, and the other tube opening of the second heat exchange tube is connected to one tube opening of the first heat exchange tube through a U-shaped tube. The other tube opening of the first heat exchange tube forms a superheated steam outlet; The evaporator is composed of a mixed gas chamber, an air intake chamber, a water spray chamber, an evaporation tube, fins and a downcomer. The mixed gas chamber and the air intake chamber are arranged opposite to each other in the upper and lower parts. A water spray chamber is arranged between the mixed gas chamber and the air intake chamber. A downcomer is arranged between the mixed gas chamber and the water spray chamber and between the water spray chamber and the air intake chamber. Evaporation tubes are arranged on both sides of each downcomer to connect the mixed gas chamber and the water spray chamber and the water spray chamber and the air intake chamber. Evaporation tubes are installed on both sides of the mixed gas chamber and the air intake chamber. Fins are arranged on each evaporation tube and downcomer. It also includes a water heater. A water heating section is provided between the smoke outlet section and the air preheating section, and a water heater is provided in the water heating section.

2. A novel air humidifying superheater according to claim 1, characterized in that: The water heater is composed of an upper water supply tank, a lower water supply tank, finned tubes, an inlet pipe, an outlet pipe and a return pipe. The upper water supply tank and the lower water supply tank are arranged opposite to each other in upper and lower directions. Finned tubes are arranged between the upper water supply tank and the lower water supply tank. The upper water supply tank is provided with an inlet pipe and an outlet pipe, and the lower water supply tank is provided with a return pipe connected to the inlet pipe.

3. A novel air humidifying superheater according to claim 2, characterized in that: The bottoms of the upper water supply tank and the lower water supply tank are arc-shaped structures.

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