Gas waste heat recovery and steam collection device

Abstract

The utility model discloses a gas waste heat recovery and steam collection device, relates to the technical field of waste heat recovery and utilization, and aims to solve the problems that in the prior art, gas has very high temperature when discharged from a blast furnace, but the temperature of the gas is reduced after the gas is treated by a purification system, and the purification system cannot reasonably utilize the high-temperature gas. A high-temperature gas inlet is formed in the middle of the upper end of the waste heat collecting device, a water condensate gas outlet is formed in the lower end of the waste heat collecting device, the lower end of the water condensate gas outlet is connected with a filtering device, and a plurality of heat exchange tube nests are arranged in the waste heat collecting device in an array mode. Rectangular heat conduction pieces are fixedly connected to the two sides of the heat exchange tube nest, an air suction pipe is connected to the lower end of one side of the waste heat collecting device, a rotating shaft is rotationally connected to the middle of the interior of the air suction pipe, spiral blades are fixedly connected to the rotating shaft, and a motor box is fixedly connected to one side of the upper end of the air suction pipe.

Description

Technical Field

[0001] This utility model relates to the field of waste heat recovery and utilization technology, specifically a steam collection device for recovering waste heat from coal gas. Background Technology

[0002] Blast furnace gas is a combustible gas produced as a byproduct of blast furnace ironmaking. Its approximate composition is 6-22% carbon dioxide, 21-26% carbon monoxide, 1-4% hydrogen, 53-57% nitrogen, [4] 0.2-0.5% hydrocarbons and a small amount of sulfur dioxide. The hot air temperature of blast furnace gas refers to the temperature of the hot air in the gas discharged from the blast furnace lining. In the blast furnace smelting process, iron ore and smelting additives are charged into the blast furnace layer by layer through the upper charging port. The high-temperature gas generated by combustion in the blast furnace is discharged from the top of the furnace and discharged into the atmosphere after being treated by the gas purification system.

[0003] The gas is at a very high temperature when it is discharged from the blast furnace, but the temperature is reduced after the gas is treated by the purification system. The purification system cannot make reasonable use of the high temperature gas. Therefore, there is an urgent need in the market to develop a gas waste heat recovery steam collection device to help people solve the existing problems. Utility Model Content

[0004] The purpose of this invention is to provide a gas waste heat recovery steam collection device to solve the problem mentioned in the background art that the gas discharged from the blast furnace has a very high temperature, but the temperature of the gas is reduced after being treated by the purification system, and the purification system cannot make reasonable use of the high temperature gas.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a waste heat recovery steam collection device for coal gas, comprising a waste heat collection device, a high-temperature gas inlet provided at the middle of the upper end of the waste heat collection device, a condensate gas outlet provided at the lower end of the waste heat collection device, a filter device connected to the lower end of the condensate gas outlet, multiple heat exchange tubes arranged in an array inside the waste heat collection device, rectangular heat-conducting plates fixedly connected to both sides of the heat exchange tubes, a suction pipe connected to the lower end of one side of the waste heat collection device, a rotating shaft rotatably connected to the middle of the inside of the suction pipe, a spiral blade fixedly connected to the rotating shaft, and a motor housing fixedly connected to one side of the upper end of the suction pipe.

[0006] Preferably, the waste heat collection device has an insulation layer on its inner end face, and the insulation layer has a corrosion-resistant and high-temperature-resistant layer on its inner end face.

[0007] Preferably, the upper ends of the plurality of heat exchange tubes are connected to a cold water inlet pipe, one end of which passes through one end face of the waste heat collection device and is connected to an external water supply device. The lower ends of the plurality of heat exchange tubes are connected to a hot water outlet pipe, one end of which passes through one end face of the waste heat collection device and is connected to an external hot water collection device.

[0008] Preferably, both sides of the middle section inside the air inlet tube are fixedly connected to limit rings by support rods, and the two ends of the rotating shaft pass through the middle of the two limit rings and are fixedly connected to fixing rings. One end of the rotating shaft passes through the middle of the fixing ring and is fixedly connected to a first conical tooth.

[0009] Preferably, a motor is fixedly installed inside the motor housing, and the output shaft of the motor is connected to a transmission shaft via a coupling.

[0010] Preferably, the lower end of the drive shaft extends through the upper surface of the intake pipe and is fixedly connected to a second conical tooth.

[0011] Preferably, the second conical tooth on the drive shaft meshes with the first conical tooth on the rotating shaft.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. In this utility model, by setting up heat exchange tubes, cold water is delivered to multiple heat exchange tubes through a cold water inlet pipe. Gas enters the waste heat collection device through a high-temperature gas inlet to heat the heat exchange tubes. The heat exchange efficiency is improved by rectangular heat-conducting plates on the heat exchange tubes. The heated water is delivered to the hot water collection device through a hot water outlet pipe for storage and can be used for domestic hot water and industrial hot water.

[0014] 2. In this utility model, by setting up an air suction pipe, an air suction pipe is connected to the lower end of one side of the waste heat collection device. A rotating shaft is rotatably connected to the middle of the air suction pipe. A spiral blade is fixedly connected to the rotating shaft. The motor drives the transmission shaft to rotate, and the transmission shaft drives the rotating shaft to rotate. The rotating shaft drives the spiral blade to rotate, so that the air suction pipe draws in the gas that has undergone heat exchange and enters the gas purification system for processing.

[0015] 3. In this utility model, through the setting of the filter device, the condensate generated by heat exchange on the inner end face of the waste heat collection device and the heat exchange tube flows downward under the action of gas flow and its own gravity and flows into the filter device through the water condensate outlet. After being filtered by the filter device, the condensate can be supplied to the spray tower in the gas purification system. The spray tower can simultaneously purify the harmful substances in the condensate and the gas. Attached Figure Description

[0016] Figure 1 This is a front view of a gas waste heat recovery steam collection device according to the present invention;

[0017] Figure 2 This is a front sectional view of the present invention;

[0018] Figure 3 This is a top sectional view of the present invention;

[0019] Figure 4 This is a detailed enlarged view of part A of this utility model.

[0020] In the diagram: 1. Waste heat collection device; 101. Insulation layer; 102. Corrosion-resistant and high-temperature resistant layer; 103. High-temperature gas inlet; 104. Water condensate outlet; 105. Filter device; 2. Heat exchange tubes; 201. Rectangular heat-conducting plate; 202. Cold water inlet pipe; 203. Hot water outlet pipe; 3. Suction pipe; 301. Limiting ring; 4. Rotating shaft; 401. Spiral blade; 402. Fixing ring; 403. First conical tooth; 5. Motor box; 501. Motor; 502. Drive shaft; 503. Second conical tooth. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] See also Figure 1-4 An embodiment of this utility model provides a gas waste heat recovery steam collection device, including a waste heat collection device 1. A high-temperature gas inlet 103 is provided at the middle of the upper end of the waste heat collection device 1, and a condensate gas outlet 104 is provided at the lower end of the waste heat collection device 1. A filter device 105 is connected to the lower end of the condensate gas outlet 104. Multiple heat exchange tubes 2 are arranged in an array inside the waste heat collection device 1. Rectangular heat-conducting plates 201 are fixedly connected to both sides of the heat exchange tubes 2. A suction pipe 3 is connected to the lower end of one side of the waste heat collection device 1. A rotating shaft 4 is rotatably connected to the middle of the inside of the suction pipe 3. A spiral blade 401 is fixedly connected to the rotating shaft 4. A motor box 5 is fixedly connected to one side of the upper end of the suction pipe 3.

[0023] Furthermore, the waste heat collection device 1 has an insulation layer 101 on its inner end face, and a corrosion-resistant and high-temperature-resistant layer 102 on its inner end face. The insulation layer 101 prevents the gas heat from being transferred out of the waste heat collection device 1, and the corrosion-resistant and high-temperature-resistant layer 102 prevents corrosive substances inside the gas from corroding the waste heat collection device 1.

[0024] Furthermore, the upper ends of multiple heat exchange tubes 2 are connected to a cold water inlet pipe 202. One end of the cold water inlet pipe 202 passes through one side of the waste heat collection device 1 and is connected to an external water supply device. The lower ends of multiple heat exchange tubes 2 are connected to a hot water outlet pipe 203. One end of the hot water outlet pipe 203 passes through one side of the waste heat collection device 1 and is connected to an external hot water collection device. Cold water is supplied to multiple heat exchange tubes 2 through the cold water inlet pipe 202. Gas enters the waste heat collection device 1 through the high temperature gas inlet 103 to heat the heat exchange tubes 2. The heat exchange efficiency is improved by the rectangular heat-conducting plates 201 on the heat exchange tubes 2. The heated water is transported to the hot water collection device through the hot water outlet pipe 203 for storage and can be used for domestic hot water and industrial hot water.

[0025] Furthermore, both sides of the middle section inside the air inlet tube 3 are fixedly connected to limit rings 301 by support rods. The two ends of the rotating shaft 4 pass through the middle of the two limit rings 301 and are fixedly connected to the fixing rings 402. One end of the rotating shaft 4 passes through the middle of the fixing ring 402 and is fixedly connected to the first conical tooth 403.

[0026] Furthermore, a motor 501 is fixedly installed inside the motor housing 5. The output shaft of the motor 501 is connected to a transmission shaft 502 via a coupling, and the transmission shaft 502 is driven to rotate by the motor 501.

[0027] Furthermore, the lower end of the drive shaft 502 extends through the upper surface of the intake pipe 3 into the interior and is fixedly connected to a second conical tooth 503.

[0028] Furthermore, the second conical tooth 503 on the drive shaft 502 meshes with the first conical tooth 403 on the output shaft of the rotating shaft 4. The drive shaft 502 drives the rotating shaft 4 to rotate, and the rotating shaft 4 drives the spiral blade 401 to rotate, so that the suction pipe 3 draws in the gas that has undergone heat exchange and enters the gas purification system for processing.

[0029] Working principle: During use, cold water is supplied to multiple heat exchange tubes 2 through the cold water inlet pipe 202. Gas enters the waste heat collection device 1 through the high temperature gas inlet 103 to heat the heat exchange tubes 2. The heat exchange efficiency is improved by the rectangular heat-conducting plates 201 on the heat exchange tubes 2. The heated water is transported to the hot water collection device through the hot water outlet pipe 203 for storage and can be used for domestic hot water and industrial hot water. The motor 501 drives the drive shaft 502 to rotate, which in turn drives the rotating shaft 4 to rotate. The rotating shaft 4 drives the spiral blades 401 to rotate, so that the suction pipe 3 draws in the heat exchanged gas and enters the gas purification system for treatment. The condensate generated by heat exchange on the inner end face of the waste heat collection device 1 and the heat exchange tubes 2 flows downward under the action of gas flow and its own gravity, and flows into the filter device 105 through the condensate outlet 104. After being filtered by the filter device 105, the condensate can be supplied to the spray tower in the gas purification system. The spray tower can simultaneously purify the harmful substances in the condensate and the gas.

[0030] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A gas waste heat recovery steam collection device, comprising a waste heat collection device (1), characterized in that: The waste heat collection device (1) has a high-temperature gas inlet (103) at the middle of its upper end and a condensate gas outlet (104) at its lower end. A filter device (105) is connected to the lower end of the condensate gas outlet (104). Multiple heat exchange tubes (2) are arranged in an array inside the waste heat collection device (1). Rectangular heat-conducting plates (201) are fixedly connected to both sides of the heat exchange tubes (2). A suction pipe (3) is connected to the lower end of one side of the waste heat collection device (1). A rotating shaft (4) is rotatably connected to the middle of the suction pipe (3). A spiral blade (401) is fixedly connected to the rotating shaft (4). A motor box (5) is fixedly connected to one side of the upper end of the suction pipe (3).

2. The gas waste heat recovery steam collection device according to claim 1, characterized in that: The waste heat collection device (1) has an insulation layer (101) on its inner end face, and the insulation layer (101) has a corrosion-resistant and high-temperature-resistant layer (102) on its inner end face.

3. The gas waste heat recovery steam collection device according to claim 1, characterized in that: The upper ends of the multiple heat exchange tubes (2) are connected to a cold water inlet pipe (202). One end of the cold water inlet pipe (202) passes through one side of the waste heat collection device (1) and is connected to an external water supply device. The lower ends of the multiple heat exchange tubes (2) are connected to a hot water outlet pipe (203). One end of the hot water outlet pipe (203) passes through one side of the waste heat collection device (1) and is connected to an external hot water collection device.

4. The gas waste heat recovery steam collection device according to claim 1, characterized in that: The air intake tube (3) has two limiting rings (301) fixedly connected to the middle of both sides by a support rod. The two ends of the rotating shaft (4) pass through the middle of the two limiting rings (301) and are fixedly connected to a fixing ring (402). One end of the rotating shaft (4) passes through the middle of the fixing ring (402) and is fixedly connected to a first conical tooth (403).

5. The gas waste heat recovery steam collection device according to claim 1, characterized in that: The motor housing (5) is fixedly equipped with a motor (501), and the output shaft of the motor (501) is connected to a transmission shaft (502) through a coupling.

6. The gas waste heat recovery steam collection device according to claim 5, characterized in that: The lower end of the drive shaft (502) extends through the upper surface of the air intake pipe (3) into the interior and is fixedly connected with a second conical tooth (503).

7. The gas waste heat recovery steam collection device according to claim 6, characterized in that: The second conical tooth (503) on the drive shaft (502) meshes with the first conical tooth (403) on the rotating shaft (4).

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