Supporting type economizer of dry quenching waste heat boiler

Abstract

The utility model discloses a kind of support type economizers of dry quenching waste heat boiler, including steel frame, detachably installed with economizer box on the steel frame, flue gas inlet is opened in the upper end of economizer box, flue gas outlet is opened in the lower end, economizer box square steel is fixedly installed in the economizer box, heat exchange pipe is suspended on the economizer box square steel by hanger plate, the inlet of heat exchange pipe is communicated with economizer inlet header, the outlet of heat exchange pipe is communicated with economizer outlet header.The utility model is supported in steel frame platform by setting economizer box, replace by hanger directly suspending economizer in steel frame platform, under the condition of same light pipe or high-frequency finned tube, by weight comparison, the weight of the support type economizer of the utility model is reduced by about 10% compared with traditional suspension type economizer;The utility model is more compact than existing suspension type structure, and space utilization is higher.

Description

Technical Field

[0001] This utility model relates to the field of waste heat boiler technology, and in particular to a supported economizer for a dry quenching coke waste heat boiler. Background Technology

[0002] Dry quenching technology can recover the sensible heat of red-hot coke, significantly reduce atmospheric pollution, improve coke quality, and optimize blast furnace production. The coking process alone can reduce energy consumption by approximately 60 kg of standard coal equivalent per ton of coke. It represents the largest proportion of recoverable waste heat in the steel industry, accounting for about 50% of recoverable waste heat. Since its emergence, dry quenching technology has undergone decades of development, bringing considerable economic and environmental benefits to steel and coking enterprises due to its excellent energy-saving and environmental protection effects. It has become a major energy-saving and environmental protection technology for coking and integrated steel enterprises. The dry quenching waste heat boiler is an important component of the dry quenching unit and one of the key technologies with high technological content. The rational design of the dry quenching waste heat boiler is of great significance for the safe and stable operation of the entire dry quenching system.

[0003] After long-term development, current dry quenching waste heat boilers have made significant progress in terms of structural rationality and wear resistance. Steam parameters have also evolved from medium temperature and pressure to high temperature and high pressure (typical steam parameters are 9.81 MPa, 540℃), contributing to the widespread application of dry quenching technology in coking enterprises. However, previously imported technologies all used suspended economizers. These economizers are suspended from a steel frame platform by rods, often obstructing the movement space of operation and maintenance personnel, making maintenance inconvenient, and their weight significantly impacts manufacturing costs. Therefore, developing a supported economizer for dry quenching waste heat boilers is of great significance for reducing space occupation, saving materials, and facilitating maintenance. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model designs a supported economizer for a dry quenching waste heat boiler.

[0005] The present invention adopts the following technical solution:

[0006] A supported economizer for a dry quenching waste heat boiler includes a steel frame on which an economizer housing is detachably mounted. The economizer housing has a flue gas inlet at the upper end and a flue gas outlet at the lower end. A square steel frame for the economizer housing is fixedly mounted inside the housing. Heat exchange tubes are suspended from the square steel frame by a hanging plate. The inlet of the heat exchange tubes is connected to the economizer inlet header, and the outlet of the heat exchange tubes is connected to the economizer outlet header.

[0007] Preferably, an economizer housing support H-beam is fixedly connected to the outside of the economizer housing, and the economizer housing can be detachably installed on the steel frame via the economizer housing support H-beam.

[0008] Preferably, the economizer housing is supported by H-beams and steel frames connected by bolts.

[0009] Preferably, the heat exchange tube is a bare tube or a high-frequency finned tube.

[0010] Preferably, the economizer outlet header is located above the economizer inlet header, and the water in the heat exchange tubes flows from bottom to top.

[0011] The beneficial effects of this utility model are: (1) By setting up an economizer box, which is supported on a steel frame platform, this utility model replaces the direct suspension of the economizer on the steel frame platform by a hanger rod. Under the same light tube or high frequency fin tube, by weight calculation and comparison, the weight of the supported economizer of this utility model is reduced by about 10% compared with the traditional suspended economizer; (2) This utility model is more compact and has a higher space utilization rate than the existing suspended structure. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] In the diagram: 1. Economizer inlet header; 2. Plain tube or high-frequency finned tube; 3. Economizer outlet header; 4. Economizer housing; 5. Square steel for economizer housing; 6. H-beams supporting economizer housing; 7. Steel frame; A. Flue gas inlet; B. Flue gas outlet; C. Economizer feedwater inlet; D. Economizer feedwater outlet. Detailed Implementation

[0014] The technical solution of this utility model will be further described in detail below through specific embodiments and with reference to the accompanying drawings:

[0015] Example: Figure 1 As shown, a supported economizer for a dry quenching waste heat boiler includes a steel frame 7. An economizer housing 4 is detachably installed on the steel frame. The upper end of the economizer housing has a flue gas inlet, and the lower end has a flue gas outlet. An economizer housing square steel 5 is fixedly installed inside the economizer housing. Heat exchange tubes are suspended from the economizer housing square steel by a hanging plate. The inlet of the heat exchange tubes is connected to the economizer inlet header 1, and the outlet of the heat exchange tubes is connected to the economizer outlet header 3.

[0016] An economizer housing is fixedly connected to an economizer housing support H-beam 6 on the outside, and the economizer housing can be detachably installed on the steel frame via the economizer housing support H-beam.

[0017] The economizer housing is supported by H-beams and a steel frame, which are bolted together. The heat exchange tubes are either bare tubes or high-frequency finned tubes.

[0018] The economizer outlet header is located above the economizer inlet header, and the water in the heat exchange tubes flows from bottom to top.

[0019] In use, the gas-side circulation is from top to bottom: the flue gas inlet A passes through the economizer housing 4 to the flue gas outlet B. The water-side circulation is from bottom to top: the economizer feedwater inlet C enters from the economizer inlet header 1, passes through the bare tube or high-frequency finned tube 2 to counter-currently cool the flue gas, and finally reaches the economizer outlet header 3, and is output from the economizer feedwater outlet D.

[0020] The above-described embodiments are merely preferred solutions of this utility model and are not intended to limit this utility model in any way. Other variations and modifications are possible without departing from the technical solutions described in the claims.

Claims

1. A supported economizer for a dry quenching waste heat boiler, comprising a steel frame, characterized in that, An economizer housing is detachably installed on the steel frame. The economizer housing has a flue gas inlet at the top and a flue gas outlet at the bottom. An economizer housing square steel is fixedly installed inside the economizer housing. Heat exchange tubes are suspended from the economizer housing square steel by a hanging plate. The inlet of the heat exchange tube is connected to the economizer inlet header, and the outlet of the heat exchange tube is connected to the economizer outlet header.

2. The supported economizer of a dry quenching waste heat boiler according to claim 1, characterized in that, The economizer housing is fixedly connected to an H-beam supporting the economizer housing on the outside, and the economizer housing can be detachably installed on the steel frame via the H-beam supporting the economizer housing.

3. The supported economizer of a dry quenching waste heat boiler according to claim 2, characterized in that, The economizer housing is supported by H-beams and steel frames, which are connected by bolts.

4. The supported economizer of a dry quenching waste heat boiler according to claim 1, characterized in that, The heat exchange tubes are either bare tubes or high-frequency finned tubes.

5. The supported economizer of a dry quenching waste heat boiler according to claim 1, characterized in that, The economizer outlet header is located above the economizer inlet header, and the water in the heat exchange tubes flows from bottom to top.

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