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Method and device for multi-point recovery and efficient utilization of waste heat at tail of sintering machine

A sintering machine, multi-point technology, which is applied to the multi-point recovery and efficient utilization of waste heat at the tail of the sintering machine, and the field of waste heat utilization devices at the tail of the sintering machine, which can solve the problem of incomplete waste heat recovery, inflexible adjustment means, and inability to meet user heat needs, etc. question

Active Publication Date: 2018-11-13
ZHONGYE-CHANGTIAN INT ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] (1) Waste heat recovery is not complete;
[0011] (2) The operating environment near the return lane is harsh;
[0012] (3) The adjustment method is not flexible, the quality of steam production is unstable, and it cannot meet the various heat needs of users

Method used

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  • Method and device for multi-point recovery and efficient utilization of waste heat at tail of sintering machine
  • Method and device for multi-point recovery and efficient utilization of waste heat at tail of sintering machine
  • Method and device for multi-point recovery and efficient utilization of waste heat at tail of sintering machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0185] A method for multi-point recovery and high-efficiency utilization of waste heat at the tail of a sintering machine, the method comprising the following steps:

[0186] 1) Put the sintering mixture into the sintering machine trolley 1 to ignite and start sintering;

[0187] 2) A radiation heat exchanger 3 is installed above the return lane 2 at the rear of the sintering machine. The feed water enters the radiation heat exchanger 3 to exchange heat with the empty trolley 1 on the return lane 2, and the feed water is heated to become low-temperature water;

[0188] 3) Several wind boxes 4 at the tail of the sintering machine are equipped with a convection heat exchanger 6 at the position corresponding to the flue 5, and the low-temperature water enters the convection heat exchanger 6 to exchange heat with the high-temperature flue gas in the flue 5, and the low-temperature water passes through the high-temperature Steam is generated after the flue gas is heated;

[0189] ...

Embodiment 2

[0202] Repeat Example 1, except that in step 4), the steam is sent out through the steam main pipe L1 for use by the user. An external steam pipe L2 is also connected to the steam main pipe L1. The external steam is introduced through the external steam pipeline L2, and mixed with the steam in the steam main pipe L1 for use by users. The external steam pipe L2 introduces superheated steam.

[0203] In step 4), the first detection point M is set on the steam main pipe L1, the external steam pipeline L2 merges to the upstream of the steam main pipe L1 1 . Set the second detection point M on the external steam pipeline L2 2 . The third detection point M is set at the downstream of the external steam pipe L2 merging to the steam main pipe L1 3 . The first detection point M 1 On-line detection of steam flow Q at the corresponding position 1 and steam enthalpy h 1 . The second detection point M 2 On-line detection of steam flow Q at the corresponding position 2 and steam...

Embodiment 3

[0227] like figure 2 and 3 As shown, a multi-point recovery and high-efficiency utilization device for waste heat at the tail of a sintering machine, the device includes a sintering machine A, and a return lane 2 is provided under the tail of the sintering machine A. A plurality of bellows 4 are arranged under the trolley 1 of the sintering machine A. Each wind box 4 is connected to the lower flue 5 through its respective wind box branch pipe 401 . The device also includes a radiation heat exchanger 3 and a convective heat exchanger 6 . Wherein the radiation heat exchanger 3 is arranged above the return lane 2 . The convective heat exchanger 6 is arranged on the flue 5 corresponding to several wind boxes 4 at the tail of the sintering machine A. The water outlet 304 of the radiant heat exchanger 3 is connected to the inlet of the convective heat exchanger 6 .

[0228] The convective heat exchanger 6 is a three-stage multi-tube wear-resistant convective heat exchanger.

...

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Abstract

Disclosed is a method for multi-point recovery and efficient utilization of waste heat at the tail of a sintering machine. The method includes the following steps that (1) a sintering mixture is put on a sintering machine trolley 1 for ignition, and sintering is started; (2) a radiation heat exchanger 3 is arranged above a turning lane 2 at the tail of the sintering machine, fed water enters the radiation heat exchanger 3 and carries out heat exchange with the empty trolley 1 above the turning lane 2, and the fed water is heated into low-temperature water; (3) convection heat exchangers 6 arearranged in the positions, corresponding to a plurality of air boxes 4 at the tail of the sintering machine, of a flue 5, the low-temperature water enters the convection heat exchangers 6 and carriesout heat exchange with high-temperature flue gas in the flue 5, and steam is generated after the low-temperature water is heated through the high-temperature flue gas; and (4) the steam is used by users. Through comprehensive multi-point recovery of the waste heat of the high-temperature flue gas and sensible heat of the turning lane at the tail of the sintering machine, the waste heat recovery and utilization rate is increased, and the operating environment nearby the turning lane is improved.

Description

technical field [0001] The invention relates to a sinter tail waste heat utilization device, in particular to a method and device for multi-point recovery and efficient utilization of sinter tail waste heat, belonging to the field of sinter production in the iron and steel industry. Background technique [0002] The waste heat resources carried by 1 ton of sinter ore in large and medium-sized iron and steel enterprises in my country are about 0.94-1.02GJ, accounting for about 65%-71% and 11%-12% of the total waste heat resources in the sintering process and iron and steel enterprises, respectively. Compared with large and medium-sized iron and steel enterprises in developed countries, the recovery rate of sinter waste heat resources in my country's iron and steel enterprises is lower than the average level of 30% to 45% of major foreign large and medium-sized iron and steel enterprises, only 28% to 30%. Therefore, the efficient recovery and utilization of sinter waste heat r...

Claims

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Application Information

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IPC IPC(8): F27D17/00F22B1/18
CPCF22B1/1892F27D17/004F27D2017/006Y02P10/25
Inventor 周浩宇刘前
Owner ZHONGYE-CHANGTIAN INT ENG CO LTD
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