Hot flue gas circulating device of sintering machine

Abstract

The utility model provides a hot flue gas circulating device of a sintering machine, which comprises an electric dust remover, a detection device, a three-way pipe and a heat exchange box, the electric dust remover, the detection device, the three-way pipe and the heat exchange box are sequentially communicated from left to right, a plurality of U-shaped heat exchange pipes are distributed in the heat exchange box in an array mode, and the close ends of every two adjacent heat exchange pipes are communicated through a semicircular pipe. A partition plate is arranged between every two adjacent U-shaped heat exchange pipes in the reversing box, air passing channels are arranged between the opposite ends of every two adjacent partition plates and the inner wall of the heat exchange box, a first air inlet is formed in the side wall of the left end of the heat exchange box and communicates with the three-way pipe, and a first air outlet is formed in the side wall of the right end of the heat exchange box. Smoke entering the heat exchange box from the first air inlet can flow in the heat exchange box in an S shape and finally flow out from the first air outlet, the flowing time of the smoke in the heat exchange box is prolonged, the heat exchange time is longer, and the heat utilization rate of the smoke is higher.

Description

TECHNICAL FIELD

[0001] The utility model relates to a sintering machine hot flue gas circulating device belongs to sintering machine flue gas recycling technical field. BACKGROUND

[0002] The sintering machine is a kind of equipment for high-temperature sintering of powdery material (such as iron ore, coal, etc.), so that it is bonded into blocky material with certain strength and granularity, and is widely used in steel, non-ferrous metallurgy and other industries. The flue gas generated in the sintering process accounts for half of the waste gas of the steel enterprise, and the sintering flue gas contains dust and other harmful components, so these waste gases need to be treated by dust removal before being discharged to the outside.

[0003] The utility model discloses a kind of sintering machine hot flue gas circulating structure, including electric dust collector, the sidewall of electric dust collector is equipped with first air inlet, and the sidewall of the side, away from first air inlet of electric dust collector, is equipped with first air outlet, the side of first air outlet is connected with detection box, and dust monitoring mechanism is arranged in detection box, the side, away from electric dust collector of detection box, is connected with three-way pipe, and circulation pipe is connected on three-way pipe, the side, away from detection box of three-way pipe, is connected with heat exchange box, and the end of heat exchange box is equipped with second air inlet.The utility model discloses by being provided with detection box, circulation pipe and heat exchange box on the side of the first air outlet of electric dust collector, and the air outlet pipe on heat exchange box is communicated with circulation pipe, while being provided with one-way electromagnetic valve on circulation pipe, and the end, away from three-way pipe of circulation pipe, is communicated with the flue hood of sintering machine, can reach the purpose of fully utilizing hot flue gas.

[0004] Although in the above patent, by setting heat exchange box, a part of flue gas can be heat replaced with external air, to achieve the purpose of fully utilizing hot flue gas, but after flue gas enters and exits heat exchange box, the flow path is straight in and out, and the way is end, so that the heat utilization rate of hot flue gas entering heat exchange box is low. Therefore, the utility model provides a kind of sintering machine hot flue gas circulating device. UTILITY MODEL CONTENTS

[0005] Based on the above background, the purpose of the utility model is to provide a kind of sintering machine hot flue gas circulating device, to solve the problems in the background art.

[0006] The utility model provides the following technical solutions:

[0007] The utility model relates to a sintering machine hot flue gas circulating device, including electric dust collector, detection device, tee and heat exchange box, electric dust collector, detection device, tee and heat exchange box from left to right communicate in proper order, the inside array distribution of heat exchange box has a plurality of U type heat exchange pipes, adjacent two heat exchange pipes are close to the near end and communicate through semicircular pipe, the adjacent two U type heat exchange pipes between the heat exchange box are equipped with the baffle, the opposite end of two adjacent baffle with heat exchange box inner wall between all is equipped with the air passage, the first air inlet is equipped on the left end lateral wall of heat exchange box, the first air inlet with tee communicate, the first air outlet is equipped on the right end lateral wall of heat exchange box.

[0008] As preferred, the baffle is provided with an L-shaped blocking plate on the side of the air passage close to the first air inlet end face.

[0009] As preferred, the heat exchange box is provided with a spray head on the front and rear sidewalls, the U-shaped heat exchange pipe in the heat exchange box is provided with a water storage cavity at the lower end, and the water storage cavity is provided with a filter plate.

[0010] As preferred, the filter is connected to the water storage cavity through a water supply pipe on the right wall of the heat exchange box, the output end of the filter is connected to the spray head through a shunt pipe.

[0011] As preferred, the tee valve is further connected with a circulating pipe.

[0012] As preferred, the heat exchange box is provided with a second air inlet at the left end of the top, the second air inlet is connected to the left end of the U-shaped heat exchange pipe, the heat exchange box is provided with a second air outlet at the right end of the top, and the second air outlet is connected to the circulating pipe.

[0013] Compared with the prior art, the sintering machine hot flue gas circulating device has the following advantages:

[0014] The sintering machine hot flue gas circulating device sets baffles between the adjacent two U-shaped heat exchange pipes in the heat exchange box, and sets air passages between the opposite ends of the adjacent two baffles and the inner wall of the heat exchange box, so that the flue gas entering the heat exchange box from the first air inlet can flow in an "S" shape in the heat exchange box and then flow out from the first air outlet, the flow time of the flue gas in the heat exchange box is increased, the heat exchange time is longer, and the heat utilization rate of the flue gas is higher. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description only illustrate the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of the provided drawings.

[0016] Fig. 1 is a structural schematic diagram of the present application;

[0017] Fig. 2 is a front view of the internal structure of the heat exchange box of the present application;

[0018] Fig. 3 is a plan view of the internal structure of the heat exchange box of the present application.

[0019] In the figure: 1, electric dust collector; 2, detection device; 3, heat exchange box; 4, U-shaped heat exchange pipe; 5, semicircular pipe; 6, partition; 7, air passage; 8, first air inlet; 9, first air outlet; 10, L-shaped baffle; 11, spray head; 12, water storage cavity; 13, filter plate; 14, filter; 15, circulating pump; 16, shunt pipe; 17, circulating pipe; 18, second air inlet; 19, second air outlet. DETAILED DESCRIPTION

[0020] The technical solutions of the present application will be further described in detail below by specific embodiments and in combination with the drawings. It should be understood that the implementation of the present application is not limited to the following embodiments, and any form of modification and / or change of the present application will fall within the scope of protection of the present application.

[0021] In the present application, unless otherwise specified, all parts and percentages are weight units, and the equipment and raw materials used can be purchased from the market or commonly used in the art. The methods in the following examples are conventional methods in the art, unless otherwise specified. The components or equipment in the following examples are general standard components or components known to those skilled in the art, and their structure and principle can be known to the skilled person through technical manuals or obtained through conventional experimental methods.

[0022] The embodiments of the present application will be described in detail below in combination with the drawings. In the following detailed description, many specific details are set forth in order to provide a thorough understanding of the embodiments of the present application. However, one or more embodiments can also be implemented by those skilled in the art without these specific details.

[0023] As Figs. 1-3As shown, a sintering machine hot flue gas circulating device, including electric dust collector 1, detection device 2, three-way pipe and heat exchange box 3, electric dust collector 1, detection device 2, three-way pipe and heat exchange box 3 from left to right in turn, the heat exchange box 3 inside array distribution has several U type heat exchange pipe 4, the adjacent two heat exchange pipes are close to the end by semicircular pipe 5, the reversing box is equipped with the baffle 6 between the adjacent two U type heat exchange pipe 4, the opposite end of two adjacent baffle 6 with heat exchange box 3 inner wall between is equipped with the wind passage 7, the heat exchange box 3 left end side wall is equipped with the first air inlet 8, the first air inlet 8 with the three-way pipe is communicated, the heat exchange box 3 right end side wall is equipped with the first air outlet 9.

[0024] In the above technical scheme, the baffle 6 is arranged between the adjacent two U type heat exchange pipe 4 in the heat exchange box 3, and the wind passage 7 is arranged between the opposite end of the adjacent two baffle 6 and the inner wall of the heat exchange box 3, so that the flue gas entering the heat exchange box 3 from the first air inlet 8 can flow in the "S" shape in the heat exchange box 3 and finally flow out from the first air outlet 9, the flow time of the flue gas in the heat exchange box 3 is increased, the heat exchange time is longer, and the heat utilization rate of the flue gas is higher.

[0025] In the utility model, the L type baffle 10 is arranged on the side of the wind passage 7 of the end face of the baffle 6 close to the first air inlet 8.

[0026] In the above technical scheme, by arranging the L type baffle, the flue gas entering the heat exchange box 3 flows along the surface of the baffle 6, and when passing through the wind passage 7, a vortex is first formed in the inner bay area of the L type baffle, and the dust in the flue gas passing through the electric dust collector 1 can be further deposited in the inner bay area of the L type baffle, so that the effect of further dust removal is achieved.

[0027] In the utility model, the spray head 11 is arranged on the front and rear side walls of the heat exchange box 3, the U type heat exchange pipe 4 in the heat exchange box 3 is provided with the water storage cavity 12 at the lower end, and the filter plate 13 is arranged in the water storage cavity 12.

[0028] In the above technical scheme, by arranging the spray head 11, water flow can be sprayed out through the conveying of the circulating pump 15 to flush the dust adhered to the surface of the U type heat exchange pipe 4 and the baffle 6.

[0029] In the utility model, the filter 14 is connected to the right wall of the heat exchange box 3 through the water conveying pipe, the input end of the filter 14 is communicated to the water storage cavity 12, the output end of the filter 14 is connected to the circulating pump 15 through the water conveying pipe, and the output end of the circulating pump 15 is communicated to the spray head 11 through the shunt pipe 16.

[0030] In the above technical scheme, the filter 14 is arranged to perform secondary filtration on the water in the water storage cavity 12 entering the circulating pump 15, thereby preventing damage of the circulating pump 15 and clogging of the spray head 11.

[0031] In the utility model, the three-way valve is further connected with a circulating pipe 17.

[0032] In the above technical scheme, one end of the circulating pipe 17 is connected with the three-way pipe, and the other end is communicated with the smoke cover of the sintering machine, so that the flue gas discharged from the electrostatic precipitator 1 can be transported into the smoke cover as the sintering gas of the sintering machine.

[0033] In the utility model, the second air inlet 18 is communicated with the left end of the U-shaped heat exchange pipe 4, and the second air outlet 19 is arranged at the right end of the top of the heat exchange box 3 and communicated with the circulating pipe 17.

[0034] In the above technical scheme, the second air inlet 18 is externally connected with an air extractor to extract the external air, which flows through the U-shaped heat exchange pipe 4 to perform heat replacement with the flue gas in the heat exchange box 3, and finally flows into the circulating pipe 17 through the second air outlet 19 to provide the sintering gas for the sintering machine.

[0035] It should be particularly noted that all the electrical elements in the utility model are controlled by the PLC control cabinet.

[0036] The principle and implementation mode of the utility model are described by using specific examples in the present text, and the above description of the examples is only used to help understand the method and core idea of the utility model. It should be pointed out that, for ordinary skilled persons in the technical field, some improvements and modifications can be made to the utility model without departing from the principle of the utility model, and these improvements and modifications also fall within the protection scope of the utility model claim.

Claims

1. A sintering machine hot flue gas circulation device, comprising an electric dust collector (1), a detection device (2), a tee pipe and a heat exchange box (3), characterized in that: The electric dust collector (1), the detection device (2), the three-way pipe and the heat exchange box (3) are sequentially communicated from left to right, a plurality of U-shaped heat exchange pipes (4) are arranged in the heat exchange box (3), the proximal ends of the adjacent two heat exchange pipes are communicated through semicircular pipes (5), a partition plate (6) is arranged between the adjacent two U-shaped heat exchange pipes (4) in the heat exchange box (3), the opposite ends of the two adjacent partition plates (6) and the inner wall of the heat exchange box (3) are both provided with air passing channels (7), a first air inlet (8) is arranged on the left end side wall of the heat exchange box (3), the first air inlet (8) is communicated with the three-way pipe, and a first air outlet (9) is arranged on the right end side wall of the heat exchange box (3).

2. A sintering machine hot flue gas recycling device according to claim 1, characterized in that: An L-shaped blocking plate (10) is arranged on one end face of the partition plate (6) close to the first air inlet (8) and on the side of the air passing channel (7).

3. A sintering machine hot flue gas recycling device according to claim 1, characterized in that: Sprayers (11) are arranged on the front and rear side walls of the heat exchange box (3), water storage cavities (12) are arranged at the lower ends of the U-shaped heat exchange pipes (4) in the heat exchange box (3), and filter plates (13) are arranged in the water storage cavities (12).

4. A sinter machine hot flue gas recycling device according to claim 3, characterized in that: A filter (14) is connected to the right wall of the heat exchange box (3) through a water conveying pipe, an input end of the filter (14) is communicated with the water storage cavity (12), an output end of the filter (14) is connected with a circulating pump (15) through a water conveying pipe, and the output end of the circulating pump (15) is communicated with the sprayers (11) through a shunt pipe (16).

5. A sinter machine hot flue gas recycling device according to claim 4, characterized in that: The three-way pipe is also connected with a circulating pipe (17).

6. A sinter machine hot flue gas recycling device according to claim 5, characterised in that: A second air inlet (18) is arranged at the left top end of the heat exchange box (3), the second air inlet (18) is communicated with the left end of the U-shaped heat exchange pipe (4), a second air outlet (19) is arranged at the right top end of the heat exchange box (3), and the second air outlet (19) is communicated with the circulating pipe (17).

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