CN201764469U

CN201764469U - Equipment for recycling flue gas waste heat of coke oven

Info

Publication number: CN201764469U
Application number: CN2010205219794U
Authority: CN
Inventors: 任海清
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-09-09
Filing date: 2010-09-09
Publication date: 2011-03-16
Anticipated expiration: 2020-09-09

Abstract

The utility model relates to equipment for recycling flue gas waste heat and in particular to an equipment for recycling flue gas waste heat of coke oven being composed of an intermediate heat pipe steam generator, a low temperature heat pipe steam generator, a soft water preheater, a boiler, a steam-water circulation pipeline, a water pump, and a control instrument, wherein the lower heat absorption ends of the intermediate heat pipe steam generator, the low temperature heat pipe steam generator, and the soft water preheater are orderly disposed inside the general boiler flue, a plurality of increasing pipes and descending pipes being disposed between the upper parts of the intermediate heat pipe steam generator, the low temperature heat pipe steam generator, and the soft water preheater and the boiler, one end of the soft preheater being connected to a water intake pipe and the water pump, while the other end is communicated with the boiler through a water pipe, the control instrument being integratedly controlled by a PLC system. The utility model has the advantages of reliable running and high efficiency of recycling flue gas waste heat, and can explicitly reduce production cost and decrease pollution of waste smoke on environment. The utility model can not only be applied to recycling of flue gas waste heat of coke oven, but also can be applied to industrial enterprises requiring emission of high temperature such as steel, chemical and building material.

Description

The coke oven flue gas waste heat recovery apparatus

Technical field

The utility model relates to a kind of flue gas waste heat recovery equipment, and especially a kind of coke oven flue gas waste heat recovery apparatus belongs to the industrial energy saving apparatus field.

Background technology

Along with social progress and environmental requirement, the flue gas waste heat recovery technology is ripe gradually and begin to be applied to produce actual, but in the coking process of coke is produced, flue gas behind the gas-fired heating coke oven just reclaims the apparent gas of part wherein by heat storage brick, then just enter chimney and enter atmosphere, still have bigger recycling to be worth for the fume afterheat that enters chimney through main chimney flue in fact by main chimney flue.This background technology has not only increased production cost, also can influence air quality.Both made existing flue gas waste heat recovery technology also have the defective that heat exchange efficiency is not high, the equipment applicability is not strong.

Summary of the invention

The utility model is exactly the defective at background technology, and a kind of waste heat recovery apparatus of coke oven flue gas efficiently is provided, and the fume afterheat behind the coke oven heating flame can be carried out effective recycling, and applicability is strong.

The technical solution of the utility model is that the coke oven flue gas waste heat recovery apparatus is made up of moderate temperature heat pipe steam generator, Cryo Heat Tube steam generator, soft water preheater, drum, vapour-water circulation pipe, water pump, control instrument.The moderate temperature heat pipe steam generator; the Cryo Heat Tube steam generator; soft water preheater bottom heat absorbing end places in the main chimney flue successively; drum places on the platform; vapour-water-circulating pipe route tedge; down-comer constitutes; soft water preheater one end is connected with water inlet pipe; water pump; its other end is connected with drum by water pipe; the moderate temperature heat pipe steam generator; be respectively arranged with many group tedges and down-comer between Cryo Heat Tube steam generator and the drum; control instrument is responsible for each control loop of the utility model by PLC system centralized Control; the monitoring of all kinds of thermal parameters; control and protection.

The utility model is reliable, reclaims fume afterheat efficient height, can significantly reduce production costs, and increases economic benefit, reduces the pollution of useless flue gas to environment.The utility model not only can be used for the coke oven flue gas waste heat recovery, is equally applicable to the industrial enterprise that iron and steel, chemical industry, building materials etc. have the high-temperature flue gas discharging.

Description of drawings

Fig. 1 is an operation principle schematic diagram of the present utility model;

Fig. 2 is a structural representation of the present utility model.

The specific embodiment

The contrast accompanying drawing is further described the utility model by embodiment below.

The utility model is made up of moderate temperature heat pipe steam generator 1, Cryo Heat Tube steam generator 2, soft water preheater 3, drum 4, vapour-water circulation pipe, water pump, control instrument, and vapour-water-circulating pipe route tedge 5, down-comer 6 constitute.In order fully to reclaim the waste heat of different sections in the main chimney flue 7, the utility model has adopted moderate temperature heat pipe steam generator 1 and Cryo Heat Tube steam generator 2 simultaneously, and the function of soft water preheater 3 is to supply with drum 4 behind the heating soft water, thereby reaches purpose of energy saving.Described moderate temperature heat pipe steam generator 1, Cryo Heat Tube steam generator 2, soft water preheater 3 constitute by some finned heat pipes and casing, heat pipe has the double grading of efficient heat absorption and efficient heat release, heat pipe is divided into two parts up and down and is isolated into two spaces of sealing mutually in casing, the top of heat pipe is release end of heat, the bottom is a heat absorbing end, its effect is to utilize heat absorbing end to absorb fume afterheat also to conduct to release end of heat at a high speed, and release end of heat release heat energy heating soft water makes it to become saturated vapor and enters drum 4.

Embodiment one, as Fig. 1, shown in 2, soft water enters drum 4 from water pipe again after water pump is input to soft water preheater 3 preheatings, after condensed water in the drum 4 enters moderate temperature heat pipe steam generator 1 by down-comer 6, fume afterheat heating heat pipe heat absorbing end, heat pipe with the heat energy that absorbs by release end of heat with water vapor, the steam-water mixture that vaporization forms enters drum 4 by tedge 5 and carries out the steam separation, form saturated vapor, deliver to main steam range or user, the water of not vaporizing in the drum 4 flow back into moderate temperature heat pipe steam generator 1 by down-comer 6 and heats, and so far finishes a vapour-water circulation, has reached the purpose that fume afterheat is absorbed and finally is converted into steam; Cryo Heat Tube steam generator 2 is the same with moderate temperature heat pipe steam generator 1 with the periodic duty situation of drum 4; just the quantity of the tedge 5 between the two and the drum 4, down-comer 6 is different, and the monitoring of each control loop, all kinds of thermal parameters, control and protection are finished by PLC system and control instrument and execution unit.Because of there is equally distributed fin in the outside of the heat pipe in moderate temperature heat pipe steam generator 1, Cryo Heat Tube steam generator 2, the soft water preheater 3, so effectively increased heat exchange area, making conducts heat is strengthened, improved heat exchange efficiency, and can determine best tube wall temperature by the appropriate design of cold and hot section generating surface of opposite heat tube, be effective acid dew point and the water dew point of avoiding flue gas, thereby obviously improve resistance to corrosion, effectively avoid tube wall extension water and cause dust stratification, stifled ash.After producing enterprise's application technical solutions of the utility model of 1,000,000 tons of coke per year, per minute can produce 0.8-1.0Mpa steam, and 100Kg per hour can economize on coal.

Embodiment two, still as shown in Figure 1, 2, when the utility model is used for other industrial enterprises that high-temperature flue gas discharging is arranged, its primary structure is not done any change, connected mode and working method between moderate temperature heat pipe steam generator 1 wherein, Cryo Heat Tube steam generator 2, soft water preheater 3, drum 4, the circulation line are identical with embodiment one, only need press enterprises characteristics adjustment member Unit Installation position, or the ratio of adjusting cold and hot section heating surface area of heat pipe according to actual needs can come into operation.

Because heat pipe heat absorbing end and release end of heat in the casing have adopted the frame mode that separates fully, and cold fluid and hot fluid is separated fully, can effectively prevent to leak.Because every heat pipe is independent installation, equipment is whole to use convenient maintenance and replacement so the damage of single or many heat pipes does not influence.After increasing this coke oven flue gas waste heat recovery apparatus, the drag losses of hot flue gas is very little.The utility model is not only applicable to the coke oven flue gas waste heat recovery, is equally applicable to the manufacture enterprise that iron and steel, chemical industry, building materials etc. have the high-temperature flue gas discharging, is applicable to the transformation of old unit yet.

Claims

1. coke oven flue gas waste heat recovery apparatus, form by moderate temperature heat pipe steam generator (1), Cryo Heat Tube steam generator (2), soft water preheater (3), drum (4), vapour-water circulation pipe, water pump, control instrument, it is characterized in that moderate temperature heat pipe steam generator (1), Cryo Heat Tube steam generator (2), soft water preheater (3) bottom heat absorbing end place in the main chimney flue successively.