CN202246548U - Dry quenching preheater - Google Patents

Abstract

The utility model discloses a dry quenching pre-heater, this pre-heater include that support and slope locate the casing on the support, are equipped with heat exchange assembly in the casing, and heat exchange assembly links to each other through the elbow between the radial heat exchange tube of each vertical row and forms snakelike tube bank from top to bottom including advancing, going out the radial heat exchange tube of water header and several rows, and the both ends of all snakelike tube banks are equallyd divide and are do not communicate to advancing, going out the water header. This pre-heater can reduce its casing volume through reasonable tube bank overall arrangement to satisfy the demand of reforming transform the space, and can also improve its heat transfer and mobile comprehensive properties, reduce the loss of energy.

Description

The dry coke quenching preheater

Technical field

The utility model relates to the dry coke quenching preheater, more particularly, relates to a kind of dry coke quenching preheater.

Background technology

Red Jiao who from coke oven, releases is in 1000 ℃ of red heat states, and its coke quenching method has two kinds of wet method and dry method.Wet quenching is the method that adopts water to extinguish red Jiao.Dry quenching(of coke) cools off red Jiao with rare gas element exactly, and absorbs most of damp and hot back entering waste heat boiler generation steam among red Jiao.The major advantage of dry quenching(of coke) is environmental protection, can utilize 80% of red heat coke heat, and improves the quality of coke.

The dry coke quenching technical process is seen shown in Figure 1: redly burnt fall into dried putting out in the stove 1, and be cooled to 250 ℃ after the mobile rare gas element heat exchange from the bottom to top through the furnace roof charging apparatus, then by under drain on the burnt belt of fortune; And rare gas element through blower fan blast dried put out stove 1 cooling coke after; Get into disposable dust remover 2 dedustings through annular flue; Get into boiler 3 with about 850 ℃ high temperature then and drop to below 160 ℃, behind secondary filter 4, blast dried stove 1 internal recycle that puts out by recirculation blower 5 and use with the generator tube heat exchange.

For further promoting the throughput of dry coke quenching; Newly-built dry coke quenching all is provided with pure water preheater 10 (being recirculation blower 5 and dried putting out between the stove 1) after domestic 2000 in recirculation blower 5 exits; Circulating flue gas is carried out reducing temperature twice; Not only coke output can be improved, and the steam consumption of boiler 3 feedwater deaerations can be reduced.Please combine shown in Figure 2; This preheater 10 is a flooring, and its housing 11 generally is the cylindrical or cuboid of upper and lower ends level turnover rare gas element, up to tens meters; Structure is huge; The radially heat transfer tube that adopts 12 is general to be adopted as Fig. 3, square (being that transverse pipe spacing L equals vertical tube spacing H) shown in Figure 4, equilateral triangle (the distance of center circle L between promptly laterally adjacent two pipes equals vertical adjacent two distance of center circle H between managing), reaches several thousand, and floor space is many.

Yet, some original design without preheating device and at the dry coke quenching auxiliary of usefulness, very narrow and small at recirculation blower 5 and dried space of putting out between the stove 1, any equipment can't be installed at all.And between recirculation blower 5 and secondary filter 4, only the flue gas pipeline of about three meters of the sections of having can utilize.If adopt above-mentioned common flooring dry coke quenching preheater, promptly do not have enough handling passage and installation site, and the air resistance of preheater is too big, will produce fatal influence to existing dry coke quenching technology.

The utility model content

To the above-mentioned shortcoming that exists in the prior art, the purpose of the utility model provides a kind of dry coke quenching preheater, transforms the spatial demand through reasonable tube bank layout to satisfy, and improves its heat exchange and mobile over-all properties.

For realizing above-mentioned purpose, the utility model adopts following technical scheme:

This dry coke quenching preheater comprises that support and inclination be located at the housing on the support; Be provided with heat-exchanging component in the housing; Heat-exchanging component comprises water-in and water-out collection case and counts and arrange radially heat transfer tube; Each file radially link to each other to form snakelike tube bank from top to bottom through elbow between the heat transfer tube, the two ends of all snakelike tube banks are communicated to water-in and water-out collection case respectively.

Described adjacent two radially being between the heat transfer tube of row are staggeredly arranged, and the transverse pipe spacing is greater than vertical tube spacing, and the transverse pipe spacing is not less than 2 times of caliber.

Described vertical tube spacing is not less than 1.5 times of caliber.

Described transverse pipe spacing is 1.2～1.3 with vertical tube spacing ratio.

The center of circle of adjacent two heat transfer tubes of described each horizontally-arranged constitutes an isoceles triangle shape with the center of circle of a vertically corresponding heat transfer tube, and the ratio of this leg-of-mutton end with height is 1.2～1.3.

In technique scheme; The dry coke quenching preheater of the utility model comprises that support and inclination be located at the housing on the support; Be provided with heat-exchanging component in the housing; Heat-exchanging component comprises that water-in and water-out collection case and number arrange radially heat transfer tube, and radially linking to each other through elbow between the heat transfer tube of each file forms snakelike tube bank from top to bottom, and the two ends of all snakelike tube banks are communicated to water-in and water-out collection case respectively.This preheater can reduce its housing volume through reasonably restraining layout, transforms the spatial demand to satisfy, and can improve its heat exchange and mobile over-all properties, reduces the loss of energy.

Description of drawings

Fig. 1 is the dry coke quenching process principle figure of prior art;

Fig. 2 is the structure iron of the dry coke quenching preheater of prior art;

Fig. 3 is that the heat transfer tube of prior art radially is the foursquare synoptic diagram of arranging;

Fig. 4 is the synoptic diagram of arranging that the heat transfer tube of prior art radially is equilateral triangle

Fig. 5 is the synoptic diagram as a result of the dry coke quenching preheater of the utility model;

Fig. 6 is the axial synoptic diagram of the interchanger of the utility model;

Fig. 7 is the radially synoptic diagram of the interchanger of the utility model.

Embodiment

Further specify the technical scheme of the utility model below in conjunction with accompanying drawing and embodiment.

See also shown in Figure 5; The dry coke quenching preheater 20 of the utility model be applicable to existing original design without preheating device and carry out the reducing temperature twice transformation at the dry coke quenching auxiliary of usefulness; It comprises support 21 and tilts to be located at the housing 22 on the support 21, is provided with heat-exchanging component 23 in the housing 22.

Please combine Fig. 6, shown in Figure 7, this heat-exchanging component 23 comprises water-in and water-out collection case 231,232 and counts and arrange radially heat transfer tube 233 that radially heat transfer tube 233 is to be socketed to form by inner and outer pipe.Through the elbow 234 continuous snakelike tube banks that form from top to bottom, the two ends of all snakelike tube banks are communicated to water-in and water-out collection case 231,232 respectively, to form refrigerant body (water coolant) circulation passage between the radially heat transfer tube 233 of each file.Through so vertical snakelike arranging, has the compact orderly effect of arranging.In addition, different with prior art is, is between described adjacent two rows' the radially heat transfer tube 233 to be staggeredly arranged, and the transverse pipe spacing is greater than vertical tube spacing, and the transverse pipe spacing is not less than 2 times of caliber; Described vertical tube spacing is not less than 1.5 times of caliber; Described transverse pipe spacing is 1.2～1.3 with vertical tube spacing ratio.As a most preferred embodiment, the center of circle of adjacent two heat transfer tubes 233 of described each horizontally-arranged constitutes an isoceles triangle shape with the center of circle of a vertically corresponding heat transfer tube 233, and this leg-of-mutton end L is 1.2～1.3 with the ratio of high H.Adopt the arrangement mode of so poor row and non-equilateral triangle, the transverse pipe spacing is increased, and vertically tube spacing reduces, thereby can make the heat exchange of heat transfer tube 233 and mobile over-all properties better.In addition, the heat transfer tube of this arrangement 233 bundles can make that actual internal area equates between pipe, thereby more approach uniform flow; Periodic acceleration of fluid and deceleration have been avoided; Thereby can reduce power loss, and farthest utilize the sensible heat of thermal cycling flue gas, effectively improve the heat exchange effect.

Therefore, compared with prior art, if need same heat exchange effect; Select the above-mentioned snakelike heat transfer tube 233 that adds the pipe row mode of difference row and non-equilateral triangle; Can reduce its usage quantity greatly, and then can reduce housing 22 volumes of preheater 20, to satisfy the spatial demand of transforming.The concrete use as follows:

Can this preheater 20 be located on the recirculation blower 5 and the flue between the secondary filter 4 of dry coke quenching auxiliary; Water coolant is carried by power-equipment, through behind the gate valve 235 adjusting flows, enters into into water collection case 231 by the road; After water inlet collection case 231 compiles; Evenly distribute is intrafascicular to each heat transfer tube 233, and water coolant flows in the interior pipe of heat transfer tube 233 from the bottom to top, absorbs the heat in the circulating flue gas through the working medium of being located between the inner and outer pipe; By being pooled to water outlet collection case 232, lean on the pressure of pipeline to deliver to the boiler use again by the water coolant after the working medium heating.Through the above-mentioned heat exchange step that constantly circulates, to reach reducing temperature twice effect to flue gas.

Those of ordinary skill in the art will be appreciated that; Above embodiment is used for explaining the utility model; And be not the qualification that is used as the utility model; As long as in the connotation scope of the utility model, all will drop in claims scope of the utility model variation, the modification of the above embodiment.

Claims (5)

1. dry coke quenching preheater is characterized in that:

Comprise that support and inclination be located at the housing on the support; Be provided with heat-exchanging component in the housing; Heat-exchanging component comprises water-in and water-out collection case and counts and arrange radially heat transfer tube; Each file radially link to each other to form snakelike tube bank from top to bottom through elbow between the heat transfer tube, the two ends of all snakelike tube banks are communicated to water-in and water-out collection case respectively.

2. dry coke quenching preheater as claimed in claim 1 is characterized in that:

Described adjacent two radially being between the heat transfer tube of row are staggeredly arranged, and the transverse pipe spacing is greater than vertical tube spacing, and the transverse pipe spacing is not less than 2 times of caliber.

3. dry coke quenching preheater as claimed in claim 1 is characterized in that:

Described vertical tube spacing is not less than 1.5 times of caliber.

4. like claim 1 or 2 or 3 described dry coke quenching preheaters, it is characterized in that:

Described transverse pipe spacing is 1.2～1.3 with vertical tube spacing ratio.

5. dry coke quenching preheater as claimed in claim 1 is characterized in that:

The center of circle of adjacent two heat transfer tubes of described each horizontally-arranged constitutes an isoceles triangle shape with the center of circle of a vertically corresponding heat transfer tube, and the ratio of this leg-of-mutton end with height is 1.2～1.3.

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