Exchanging method of exhaust-heat boiler low temperature economizer
A low-temperature economizer and waste heat boiler technology, which is applied to feed water heaters, preheating, lighting and heating equipment, etc., can solve the problems of long replacement construction period, high cost and heavy workload, and achieve convenient replacement and save construction period. and construction costs
Inactive Publication Date: 2012-10-17
CHINA PETROLEUM & CHEM CORP +2
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Problems solved by technology
Due to the large volume and weight of each module, a large crane is required for disassembly and installation, which requires a long replacement period, heavy workload, and very high cost
Method used
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[0029] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0030] The module bracket 1 of the medium and low temperature economizer in the prior art is a three-dimensional frame welded by angle steel, which constitutes six side openings of upper, lower, left, right, front and rear; and each angle steel forming the bracket is bent inward , the low-temperature economizer module is located on the folded edge of each angle steel and is tightly hooped in the bracket 1 . Eight lifting lugs 12 are also welded on the support 1
[0031] Such as figure 1 As shown, in this embodiment, the height dimension of the new low-temperature economizer module 5 is designed to be slightly smaller than the height of the two left and right side ports of the support 1 . Two rows of eight lifting lugs 51 are welded on the top surface of the new low-temperature economizer module, and every two lifting lugs form a row.
[003...
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The present invention relates to an exchanging method of an exhaust-heat boiler low temperature economizer, characterized in that the method comprises the following steps: (1) dismantling an old low temperature economizer module; (2) mounting a hoisting support, wherein the hoisting support is mounted under the low temperature economizer, and an upper end face of an upper rolling bar of the hoisting support is slightly higher than an angle iron at the lower part of the support; (3) hoisting and dragging, wherein a lifting hook of a crane is connected to partial lifting lugs on the top face ofa new low temperature economizer by a sling; the new low temperature economizer is partially fed into the support from a gap at a first side face of the support; the lugs at the top face of the new low temperature economizer are connected by a chain block, and dragged along the first side to a second side face in the gap of the second side face opposite to the first side face of the support in a way of matching with the hoisting of the crane; (4) dismantling the hoisting support; compared with the prior art, in the present invention, the new low temperature economizer module can be exchanged without dismantling various modules disposed above the low temperature economizer module, so that construction period and construction cost are saved greatly; simultaneously, convenient conditions aresupplied for the future operations.
Description
technical field [0001] The invention relates to a waste heat boiler, in particular to a method for replacing an economizer of a waste heat boiler. Background technique [0002] The waste heat boiler used in the oil refining unit includes a high-temperature superheater module, a low-temperature superheater module, a spray desuperheater module, an evaporation section module, a high-temperature economizer module and a low-temperature economizer module from top to bottom. Place them in the corresponding brackets, and hoist and stack each bracket together with the modules inside it when installing. The support is usually a cubic frame made of angle steel, and the edges of each module are located exactly within the right angles of the angle steel constituting the frame. Since the economizer is located at the bottom of the waste heat boiler, the high-temperature flue gas from the gas turbine passes through the economizer first, so the low-temperature economizer is the most prone t...
Claims
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IPC IPC(8): F22D1/00B66C23/00
Inventor 蔡旻
Owner CHINA PETROLEUM & CHEM CORP