Thermal generator set tail flue high-temperature economizer
A thermal power generation unit, tail flue technology, applied in the direction of steam generation, feed water heater, heat exchanger shell, etc., can solve the problem of low cost of transformation, achieve low cost of transformation, flue gas temperature drop and feed water temperature guarantee, save The effect of heat exchange balance of coal burner
Pending Publication Date: 2020-04-21
DATANG SHIMEN POWER GENERATION
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Problems solved by technology
[0003] The invention solves the shortage of existing conditions and provides a low-retrofit cost, which can effectively guarantee the temperature drop of the flue gas and the temperature of the feed water, and overcomes the influence of the flue gas temperature drop and the temperature rise of the feed water by the adjustment of the opening of the flue gas baffle, so that the economizer High-temperature economizer for tail flue of thermal power generation unit with relatively balanced heat transfer
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Embodiment
[0018] Embodiment: This application arranges H-type high-temperature economizers in a space of about 1.3 meters above the original bare-tube economizer and low-temperature reheater at an elevation of 32.994 meters and an elevation of 31.582 meters. The H-type high-temperature economizer includes double-finned tubes and single-finned tubes. The size of the base tube of the H-type high-temperature economizer is Φ51×6.5mm, and the material is 20G. It is the same as the original economizer heating surface tube specification, The material is the same; the fins of the H-type high temperature economizer have two specifications, 38×180mm and 38×40mm, the thickness is 2mm, the pitch between the fins is 25mm, and the material is pickled carbon steel.
[0019] The horizontal pitch of the H-type high-temperature economizer is 152.4mm, and the number of horizontal rows is 78; the number of longitudinal rows is 10 rows in the front shaft flue, and 8 rows in the rear shaft flue; the H-type hi...
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The invention discloses a thermal generator set tail flue high-temperature economizer. The economizer comprises a light pipe type economizer arranged in a front vertical shaft flue, a first H-shaped economizer and a second H-shaped economizer arranged in a rear vertical shaft flue. The front vertical shaft flue is provided with the light pipe economizer below a low-temperature superheater. A middle partition wall is arranged between the front vertical shaft flue and the rear vertical shaft flue. A first H-shaped high-temperature economizer and a second H-shaped high-temperature economizer which are connected in series are arranged below the light pipe economizer and a low-temperature reheater. The first H-shaped high-temperature economizer is connected with the light pipe economizer in series. Pipe panels of the first H-shaped high-temperature economizer and the second H-shaped high-temperature economizer penetrate through the middle partition wall and are connected with each other. The device is low in improvement cost, a smoke temperature drop and a feed water temperature can be effectively guaranteed, a defect that the smoke temperature drop and a feed water temperature rise areinfluenced by adjustment of an opening degree of a smoke baffle is overcome, and a heat exchange amount of the economizer is relatively balanced compared with that of a single-side arrangement mode.
Description
technical field [0001] The invention relates to a high-temperature economizer for the tail flue of a thermal power generating set. Background technique [0002] The tail flue of the thermal power generating set is divided into the front shaft and the rear shaft flue. The middle of the front shaft and the rear shaft flue is separated by a partition wall. The front and rear flues are not connected to each other so as to adjust the adjustment of the baffle. A low-temperature reheater and a low-temperature superheater are respectively arranged in the tunnel, and a high-temperature economizer is arranged in the flue of the front shaft or the rear shaft. Catalyst inlet flue gas temperature limit limit and energy saving requirements, high-temperature economizers have been improved by increasing the heat transfer area and improving heat transfer efficiency. The common way is to add light pipes in the front shaft or rear shaft flue The economizer’s bare tube bundles, adding or repla...
Claims
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IPC IPC(8): F22D1/02F28F9/18F28F11/00
CPCF22D1/02F28F9/18F28F11/00
Inventor 黄俊刘子奇杨宁武张云
Owner DATANG SHIMEN POWER GENERATION