CN204400894U

CN204400894U - Raw coke over gas riser heat recovering device

Info

Publication number: CN204400894U
Application number: CN201420811623.2U
Authority: CN
Inventors: 周勇; 周朝晖; 侯晓东; 陈伟
Original assignee: Hangzhou Boiler Group Co Ltd
Current assignee: Xizi clean energy equipment manufacturing Co.,Ltd.
Priority date: 2014-12-22
Filing date: 2014-12-22
Publication date: 2015-06-17
Anticipated expiration: 2024-12-22

Abstract

The utility model discloses raw coke over gas riser heat recovering device, it comprises inner core and urceolus, described inner core and urceolus form jacket space, spiral pipe and fused salt heat-conducting medium is provided with, the described space of fused salt heat conducting medium filling between jacket space and spiral pipe in described jacket space.Have the following advantages: solve the problems such as existing raw gas heat recovery technology leaks, heat-conducting medium is rotten.

Description

Raw coke over gas riser heat recovering device

Technical field

The utility model belongs to ferrous metallurgy energy-saving and emission-reduction, secondary energy recovery technology field, particularly a kind of raw coke over gas riser heat recovering device.

Background technology

A large amount of waste heats, waste energy resource is had in coking production process, the coke oven heat expenditure overwhelming majority is all available waste heat, wherein: coke sensible heat accounts for 37% ~ 40%, waste gas sensible heat accounts for 18% ~ 20%, crude-gas sensible heat accounts for 30% ~ 35%, three waste heats totals account for about 90%, namely account for nearly 70% of coking production energy consumption.By coke output in 2010 3.88 hundred million tons of calculating, China's waste heat of coke oven total resources about 1.6 hundred million tons mark coal, that can recycle accounts for 30% ~ 50%, i.e. 4,800 ten thousand ~ 8,000 ten thousand tons of mark coals, wherein crude-gas sensible heat about 1,600 ten thousand ~ 2,700 ten thousand tons mark coal.No matter for coal chemical enterprise or waste heat recovery apparatus manufacturing concern, it is all the direction meriting attention and drop into that waste heat of coke oven crude gas reclaims, and has wide market outlook.

Current most coke oven adopts the mode of spraying ammoniacal liquor to cool raw gas, the raw gas of 600 ~ 750 DEG C is being cooled to while 80 ~ 100 DEG C, create the ammoniacal liquor of a large amount of about 80 DEG C, cause middle temperature waste heats a large amount of in raw gas to be wasted, and consume a large amount of ammoniacal liquor and electric energy.

For reclaiming crude-gas sensible heat, in succession developing both at home and abroad in Ascension Pipe Gasification water jacket, separate heat pipe, upcast thermal oil chuck, upcast and having filled the technology such as heat-conducting medium and coil heat exchange.Ascension Pipe Gasification water jacket technology has in use occurred that chuck weld seam breaks and has caused water to bleed the problem of coking chamber, and lower by safe limit institute producing steam parameter, and tens coal chemical enterprises once used are therefore substantially inactive at present; Separate heat pipe technical pattern is complicated, and need tiltedly put on riser inwall in many places, popularization is restricted; There is thermal oil under long term high temperature and to go bad the problem of impact heat transfer in the upcast thermal oil chuck technology originating from Japan, and its use temperature is restricted, and its working temperature is no more than 400 DEG C usually; Part coal chemical enterprise developed powder filler powder heat-conducting medium (as aluminium nitride) between upcast inner/outer tube in recent years, the feedwater that the crude-gas sensible heat imported by upcast inner core is passed in coil pipe therebetween by heat-conducting medium produces the technology of saturated vapo(u)r, this technical conceive is novel, but due to heat-conducting medium powder and between inner core and coil pipe thermal contact resistance very large, its heat transfer effect is affected, occur in test that upcast root is because cooling weld cracking not, raw gas directly enters the phenomenon burning out coil pipe between upcast inner/outer tube.In addition, what existing crude-gas sensible heat recovery technology the most often occurred also has root coking problem, affects heating surface heat exchange, even blocks raw gas passage time serious.

Utility model content

Technical problem to be solved in the utility model is, provides a kind of raw coke over gas riser heat recovering device, solves the problems such as existing raw gas heat recovery technology leaks, heat-conducting medium is rotten.

For solving the problems of the technologies described above, the raw coke over gas riser heat recovering device that the utility model provides, it comprises inner core and urceolus, described inner core and urceolus form jacket space, spiral pipe and fused salt heat-conducting medium is provided with, the described space of fused salt heat conducting medium filling between jacket space and spiral pipe in described jacket space.Select fused salt as the heat-conducting medium of jacket space, Heat-resistant stable is good, and fused salt does not explode, do not burn, corrodibility is low, produces steam hardly when less than 600 DEG C, even if reveal its steam also nontoxicity, under normal pressure, higher use temperature can be reached, be suitable for very much reclaiming crude-gas sensible heat.

As preferably, described inner core welds with urceolus after turning up in bottom, and urceolus welds with inner core after flanging in top.Inner core welds with urceolus after turning up in bottom, and weld seam is not contacted with high temperature raw gas, and water jacket technology often occurred in the past weld seam can be avoided to be heated cracking phenomena.

As preferably, described urceolus is provided with relief valve connection, fused salt import, fused salt outlet, processing medium import and processing medium outlet, described processing medium import is positioned at bottom urceolus, is connected with the below mouth of pipe of spiral pipe; Processing medium outlet is positioned at urceolus top, is connected with the top mouth of pipe of spiral pipe; Relief valve connection and fused salt outlet are positioned at the top of urceolus, and fused salt import is positioned at the bottom of urceolus; Described inner core is provided with fused salt discharge outlet, fused salt discharge outlet is positioned at the bottom of inner core.

As preferably, the fused salt heat-conducting medium in described jacket space is Molten Binary Salts or ternary molten salt.Which kind of fused salt of concrete selection and molten salt membrane are depending on coal oven dithio-gas character and the steam parameter that will produce.

As preferably, the bottom welding that described inner core is vertically located has support tube.

As preferably, described spiral pipe is single head or bull.

After adopting above structure, raw coke over gas riser heat recovering device of the present utility model compared with prior art, has the following advantages:

1) heat-conducting medium good stability, can not go bad in high temperature environments and affect heat-transfer effect.The utility model selects fused salt as the heat-conducting medium of jacket space, and Heat-resistant stable is good.For ternary molten salt (53% saltpetre, 40% Sodium Nitrite, 7% SODIUMNITRATE), its fusing point is 142 DEG C, and boiling point is 680 DEG C, stable in properties in the temperature range that crude-gas sensible heat reclaims.

2) security is good.Fused salt does not explode, and does not burn, and corrodibility is low, produces steam hardly when less than 600 DEG C, even if reveal its steam also nontoxicity, can reach higher use temperature under normal pressure, is suitable for very much reclaiming crude-gas sensible heat.

3) jacket space of the present utility model is rational in infrastructure, and inner core welds with urceolus after turning up in bottom, and weld seam is not contacted with high temperature raw gas, and water jacket technology often occurred in the past weld seam can be avoided to be heated cracking phenomena.

4) steam of higher temperature can be produced, improve waste heat recovery efficiency and grade.Compared with thermal oil, fused salt can obtain higher use temperature at the same pressure, can reach more than 500 DEG C under normal pressure, and its heat transfer coefficient is about 2 times of other thermophores.Meanwhile, the utility model have employed the heat exchange mode of spiral pipe, and feedwater stroke is long, and the coefficient of heat transfer is high.Therefore, further illustrate the steam that the utility model can produce higher temperature, improve waste heat recovery efficiency and grade.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model;

Fig. 2 is I place's enlarged view in Fig. 1;

Fig. 3 is II place's enlarged view in Fig. 1.

Wherein: 1, support tube, 2, fused salt discharge outlet, 3, processing medium import, 4, urceolus, 5, inner core, 6, spiral pipe, 7, fused salt heat-conducting medium, 8, fused salt outlet, 9, relief valve connection, 10, processing medium outlet, 11, fused salt import.

Embodiment

Below by embodiment, the utility model will be further described by reference to the accompanying drawings.

As Figure 1-3, the raw coke over gas riser heat recovering device that the present embodiment provides, be made up of inner core 5, urceolus 4, support tube 1, spiral pipe 6 and fused salt heat-conducting medium 7, inner core 5 and urceolus 4 form jacket space, fused salt heat-conducting medium 7 and spiral pipe 6 are placed in jacket space, and fused salt heat-conducting medium 7 is filled in the space between jacket space and spiral pipe 6.

Inner core 5 turns up after 180 ° in bottom and welds with urceolus 4, and urceolus 4 welds with inner core 5 after flanging in top.

Described urceolus 4 is provided with relief valve connection 9, fused salt import 11, fused salt outlet 8, processing medium import 3 and processing medium outlet 10, described processing medium import 3 is positioned at bottom urceolus, is connected with the below mouth of pipe of spiral pipe 6; Processing medium outlet 10 is positioned at urceolus top, is connected with the top mouth of pipe of spiral pipe 6; Relief valve connection 9 and fused salt outlet 8 are positioned at the top of urceolus 4, and fused salt import 11 is positioned at the bottom of urceolus 4; Described inner core 5 is provided with fused salt discharge outlet 2, and fused salt discharge outlet 2 is positioned at the place of turning up of inner core 5.Spiral pipe 6 is single head.Fused salt heat-conducting medium is released for maintenance or when changing by fused salt discharge outlet 2.During the work of raw coke over gas riser heat recovering device, fused salt import 11, fused salt outlet 8 can seal, and form independent fused salt jacket space, or are connected with pump for liquid salts by pipeline, form circulation loop.

The bottom that described inner core 5 is vertically located is welded with support tube 1.

Fused salt heat-conducting medium 7 in described jacket space is the Molten Binary Salts be made up of SODIUMNITRATE+saltpetre or the ternary molten salt be made up of saltpetre+Sodium Nitrite+SODIUMNITRATE.

Claims

1. a raw coke over gas riser heat recovering device, it comprises inner core and urceolus, it is characterized in that: described inner core and urceolus form jacket space, spiral pipe and fused salt heat-conducting medium is provided with, the described space of fused salt heat conducting medium filling between jacket space and spiral pipe in described jacket space.

2. raw coke over gas riser heat recovering device according to claim 1, is characterized in that: described inner core welds with urceolus after turning up in bottom, and urceolus welds with inner core after flanging in top.

3. raw coke over gas riser heat recovering device according to claim 2, it is characterized in that: described urceolus is provided with relief valve connection, fused salt import, fused salt outlet, processing medium import and processing medium outlet, described processing medium import is positioned at bottom urceolus, is connected with the below mouth of pipe of spiral pipe; Processing medium outlet is positioned at urceolus top, is connected with the top mouth of pipe of spiral pipe; Relief valve connection and fused salt outlet are positioned at the top of urceolus, and fused salt import is positioned at the bottom of urceolus; Described inner core is provided with fused salt discharge outlet, fused salt discharge outlet is positioned at the bottom of inner core.

4. raw coke over gas riser heat recovering device according to claim 1, is characterized in that: the fused salt heat-conducting medium in described jacket space is Molten Binary Salts or ternary molten salt.

5. raw coke over gas riser heat recovering device according to claim 2, is characterized in that: the bottom welding that described inner core is vertically located has support tube.

6. raw coke over gas riser heat recovering device according to claim 1, is characterized in that: described spiral pipe is single head or bull.