CN218237430U

CN218237430U - Waste heat recovery device for thermal power plant

Info

Publication number: CN218237430U
Application number: CN202222092892.5U
Authority: CN
Inventors: 刘磊; 刘洪波; 宫家宏; 苗毅; 崔再鑫; 宋楠
Original assignee: Dalian Power Plant of Huaneng International Power Co Ltd
Current assignee: Dalian Power Plant of Huaneng International Power Co Ltd
Priority date: 2022-08-10
Filing date: 2022-08-10
Publication date: 2023-01-06
Anticipated expiration: 2032-08-10

Abstract

The utility model discloses a waste heat recovery device that thermal power plant used belongs to waste heat recovery technical field, including heat conveyer pipe and heat recovery device, heat recovery device includes U type pipe and clearance structure, the external water source of U type pipe, and its U type bend is located inside heat pipeline, the clearance structure includes the scraper blade, connecting rod and lead screw drive mechanism, the scraper blade cover is on U type pipe, lead screw drive mechanism is located the outside of heat conveyer pipe, lead screw drive mechanism passes through the connecting rod and is connected with the scraper blade, carry out the heat transfer through setting up a plurality of U type pipes and draw the heat that the high temperature flue gas contains, in order to avoid adhering to impurity interference heat exchange efficiency such as dust on the U type pipe, set up the clearance structure and carry out periodic cleaning, the heat exchange efficiency is improved.

Description

Waste heat recovery device for thermal power plant

Technical Field

The utility model belongs to the technical field of waste heat recovery, more specifically, relate to a waste heat recovery device that thermal power plant used.

Background

The thermal power plant mainly refers to a thermal power plant, and plants for producing electric energy by using coal, petroleum, natural gas and the like as fuels mainly convert burning heat energy into mechanical energy, and equipment in the thermal power plant comprises a waste heat recycling device, so that the utilization efficiency of energy sources is improved.

Patent CN202021010675.1 describes a waste heat recovery system for exhaust smoke of a boiler in a thermal power plant, in which heat exchange tubes are arranged regularly to exchange heat, and the efficiency is not high; patent CN202022937858.4 also describes a structure related to waste heat recovery, but there is no cleaning structure inside, and the heat exchange efficiency is reduced after long-term use.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved by the utility model

The utility model aims to solve the defect about thermal power plant waste heat recovery, inefficiency at present, it is unreasonable including the installation of heat exchange tube, the heat exchange tube can't be effectual by clearance attachment etc..

2. Technical scheme

In order to achieve the above purpose, the utility model provides a technical scheme does:

the utility model discloses a waste heat recovery device that thermal power plant used, including heat conveyer pipe and heat recovery device, heat recovery device includes U type pipe and clearance structure, and the external water source of U type pipe, and inside its U type bend was located heat conveyer pipe, the clearance structure included scraper blade, connecting rod and lead screw drive mechanism, and the scraper blade cover is on U type pipe, and lead screw drive mechanism is located the outside of heat conveyer pipe, and lead screw drive mechanism passes through the connecting rod and is connected with the scraper blade.

Preferably, a plurality of U-shaped pipes are arranged in the heat conveying pipe, and the U-shaped pipes are arranged around the circumference of the central shaft of the heat conveying pipe.

Preferably, the heat conveying pipe is of a U-shaped structure and comprises a processing section and a recycling section, the heat recycling device is installed on the recycling end, and the recycling section is of a structure which contracts firstly and then expands.

Preferably, the screw rod transmission mechanism comprises a motor, a screw rod and a sliding block, the motor drives the screw rod to rotate, the sliding block is installed on the screw rod, the screw rod is coaxial with the treatment section of the heat conveying pipe, and the connecting rods are arranged around the circumference of the sliding block and are connected with the sliding block through supporting rods.

Preferably, the tube pitch of the U-shaped tube is one third of the heat transfer tube.

3. Advantageous effects

Adopt the technical scheme provided by the utility model, compare with prior art, have following beneficial effect:

(1) The utility model discloses a waste heat recovery device that thermal power plant used carries out the heat transfer through setting up a plurality of U type pipes and draws the heat that the high temperature flue gas contains, in order to avoid adhering to impurity such as dust on the U type pipe and disturbing heat exchange efficiency, sets up the clearance structure and carries out periodic cleaning, improves heat exchange efficiency.

Drawings

Fig. 1 is a schematic structural diagram of a waste heat recovery device for a thermal power plant according to the present invention;

fig. 2 is a schematic structural view of a heat recovery device of a waste heat recovery device for a thermal power plant according to the present invention;

fig. 3 is a schematic structural view of the inside of a heat conveying pipe of the waste heat recovery device for a thermal power plant according to the present invention;

fig. 4 is a schematic view of an installation structure of a U-shaped pipe of a waste heat recovery device for a thermal power plant according to the present invention;

fig. 5 is a schematic view of a partial cross-sectional structure of a waste heat recovery device for a thermal power plant of the present invention.

The reference numerals in the schematic drawings illustrate:

100. a heat delivery pipe; 110. a processing section; 120. a recovery section;

200. a heat recovery device; 210. a U-shaped pipe; 220. cleaning the structure; 221. a squeegee; 222. a connecting rod; 223. a screw drive mechanism; 2231. a motor; 2232. a screw rod; 2233. a slide block.

Detailed Description

In order to facilitate understanding of the invention, the invention will be described more fully hereinafter with reference to the accompanying drawings, in which several embodiments of the invention are shown, but which can be embodied in many different forms and are not limited to the embodiments described herein, but on the contrary are provided for the purpose of making the disclosure more thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present; when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present; the terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs; the terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention; as used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Example 1

Referring to fig. 1 to 5, the waste heat recovery device for a thermal power plant of this embodiment includes a heat conveying pipe 100 and a heat recovery device 200, the heat recovery device 200 includes a U-shaped pipe 210 and a cleaning structure 220, the U-shaped pipe 210 is externally connected to a water source, and a U-shaped bend thereof is located inside a pipeline of the heat conveying pipe 100, the cleaning structure 220 includes a scraper 221, a connecting rod 222 and a screw rod transmission mechanism 223, the scraper 221 is sleeved on the U-shaped pipe 210, the screw rod transmission mechanism 223 is located outside the heat conveying pipe 100, the screw rod transmission mechanism 223 is connected to the scraper 221 through the connecting rod 222, according to the structure of this design, the heat conveying pipe 100 flows and conveys high-temperature flue gas generated by a thermal power plant, wherein water flows in the U-shaped pipe 210, the heat of the high-temperature flue gas is sucked through a heat exchange form, it is noted that the high-temperature flue gas contains many contaminants such as impurities, which will adhere to the U-shaped pipe 210, which affect the heat exchange efficiency, the cleaning structure 220 cleans the surface of the U-shaped pipe 210, wherein the scraper 221 is sleeved on the U-shaped pipe 210, the screw rod transmission mechanism 221 drives the scraper to operate, the cleaning mechanism 223 to remove the surface of the U-shaped pipe, the heat conveying pipe to remove the impurities, the heat conveying pipe, and the heat collecting box is located below the heat collecting box, and is located below the heat conveying pipe 100, and is connected to the heat collecting box, and the heat collecting box located below the heat conveying pipe 100.

The heat conveying pipe 100 of this embodiment is provided with a plurality of U-shaped pipes 210, the U-shaped pipes 210 are arranged around the circumference of the central shaft of the heat conveying pipe 100, the heat exchange efficiency is improved by adopting the design, a plurality of thin U-shaped pipes 210 are adopted for heat exchange, which is equivalent to a small number of U-shaped pipes 210 with large diameters, the contact area between the whole body and high-temperature flue gas is increased, the heat exchange efficiency is improved, and the arrangement mode of the design can not only install a plurality of U-shaped pipes 210 in a limited space, but also does not interfere with each other.

The heat conveying pipe 100 of this embodiment is U type structure, including handling section 110 and recovery section 120, heat recovery unit 200 installs on retrieving the end, and recovery section 120 is the structure that enlarges after contracting earlier, and the structure high temperature flue gas of this design is when passing through the contraction zone earlier, stays the increase, gets into again and enlarges the region, and speed reduces, and gas produces certain disorderly phenomenon, and increase and U type pipe 210's contact time improves heat exchange efficiency.

The screw rod transmission mechanism 223 of the present embodiment includes a motor 2231, a screw rod 2232 and a slide block 2233, the motor 2231 drives the screw rod 2232 to rotate, the slide block 2233 is installed on the screw rod 2232, the screw rod 2232 is coaxial with the treatment segment 110 of the heat transport pipe 100, and the connecting rod 222 is arranged around the circumference of the slide block 2233 and connected to the slide block 2233 through a supporting rod, which is designed to control the back and forth operation of the scraper 221.

The tube pitch of U type pipe 210 of this embodiment is the third of heat conveyer pipe 100, and the structure of this design guarantees under the prerequisite of the interval between U type pipe 210 each other, and the maximize tube pitch avoids inside low temperature rivers to influence each other, during the use, around the high temperature flue gas around U type pipe 210 again, with heat transport for U type pipe 210, and at this moment, the temperature of high temperature flue gas reduces, in order to avoid microthermal high temperature flue gas to influence each other, and suitable tube pitch is especially important.

The above-mentioned embodiments only express a certain implementation manner of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the present invention; it should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which all fall within the protection scope of the present invention; therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a waste heat recovery device that thermal power plant used which characterized in that: including heat conveyer pipe (100) and heat recovery unit (200), heat recovery unit (200) are including U type pipe (210) and clearance structure (220), U type pipe (210) external water source, and its U type bend is located heat conveyer pipe (100) way inside, clearance structure (220) are including scraper blade (221), connecting rod (222) and screw drive mechanism (223), scraper blade (221) cover is on U type pipe (210), screw drive mechanism (223) are located the outside of heat conveyer pipe (100), screw drive mechanism (223) are connected with scraper blade (221) through connecting rod (222).

2. The waste heat recovery device for the thermal power plant according to claim 1, characterized in that: a plurality of U-shaped pipes (210) are arranged in the heat conveying pipe (100), and the U-shaped pipes (210) are arranged around the circumference of the central shaft of the heat conveying pipe (100).

3. The waste heat recovery device for a thermal power plant according to claim 1, characterized in that: the heat conveying pipe (100) is of a U-shaped structure and comprises a processing section (110) and a recovery section (120), the heat recovery device (200) is installed on the recovery end, and the recovery section (120) is of a structure which contracts firstly and then expands.

4. The waste heat recovery device for a thermal power plant according to claim 1, characterized in that: the screw rod transmission mechanism (223) comprises a motor (2231), a screw rod (2232) and a sliding block (2233), the motor (2231) drives the screw rod (2232) to rotate, the sliding block (2233) is installed on the screw rod (2232), the screw rod (2232) is coaxial with the treatment section (110) of the heat conveying pipe (100), and the connecting rods (222) are arranged around the circumference of the sliding block (2233) and are connected with the sliding block (2233) through supporting rods.

5. The waste heat recovery device for a thermal power plant according to claim 1, characterized in that: the pipe distance of the U-shaped pipe (210) is one third of that of the heat conveying pipe (100).