CN205328928U

CN205328928U - Cast steel filled type coke oven tedge waste heat recovery device

Info

Publication number: CN205328928U
Application number: CN201520537078.7U
Authority: CN
Inventors: 白金
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-07-23
Filing date: 2015-07-23
Publication date: 2016-06-22
Anticipated expiration: 2025-07-23

Abstract

The utility model relates to a cast steel filled type coke oven tedge waste heat recovery device, coke oven tedge major structure is constituteed to flange, tedge lower flange on tedge inner tube and the tedge, the spiral bile duct coils in the tedge inner tube outside, and heat transfer water inlet tube and heat transfer water outlet pipe are established respectively to upper and lower end, cast steel filling structure fills between tedge inner tube and spiral bile duct to wherein form a holistic hollow cylinder structure with the cladding of spiral bile duct, the cast steel filling structure outside is equipped with heat preservation and tedge dustcoat, establishes between cast steel filling structure and the tedge inner tube and casts the nail. The utility model discloses a fashioned heat -conduction structure of integral cast realizes transmitting tedge raw coke oven gas heat for the water in the spiral bile duct with the mode of metal fever conduction, and its heat transfer efficiency is high, and the security is strong, through casting the nail fixing between tedge inner tube and the cast steel filling structure, guarantee its inseparable laminating.

Description

A kind of cast steel filled type Riser waste heat recovery device for coke oven

Technical field

This utility model relates to a kind of Riser waste heat recovery device for coke oven, particularly relates to a kind of cast steel filled type Riser waste heat recovery device for coke oven。

Background technology

Coke oven coke oven uprising tube raw coke oven gas heat recovery technology is the very popular research topic in one, coking field, and it not only has very big social value, and has obvious economic worth。But current all of Riser waste heat recovery device for coke oven is essentially all employing steel structural form, substantially can divide two classes: a class is intermediate water shell type, outside tedge inner core, namely add one layer of sleeve pipe again, form water jacket samdwich, middle by interlayer Recovery of the hot water waste heat；Its advantage is that heat transfer efficiency is high, but because interlayer to keep the temperature of 6 pressures and the water outlet steam of 150 DEG C, therefore should be heat-resisting pressure again, there is certain potential safety hazard。Equations of The Second Kind is spiral container tubular type, and namely with spiral container pipe box outside the inner core of tedge, high pressure, by thinner spiral bile duct pressure-bearing, compares safety；But only top riser inner tank theca radiations heat energy heating coil bile duct, and tedge inner core does not contact with spiral bile duct or only Line Contacts, intermetallic conduction of heat is few, the hot-air that whole space is full of can only lean on the conductive-convective of air to carry out heating coil bile duct, heat conduction efficiency is non-normally low, so the advantage of spiral container pipe type exhaust heat way of recycling is safety, shortcoming is that the thermal efficiency is too low。

Utility model content

This utility model provides a kind of cast steel filled type Riser waste heat recovery device for coke oven, realized ascending tube crude-gas heat by the heat conduction structure of integral cast molding to pass to the water in spiral bile duct in the way of metal heat conduction, its heat transfer efficiency is high, high safety；Fixed by casting nail between tedge inner core and cast steel interstitital texture, it is ensured that it fits tightly。

In order to achieve the above object, this utility model realizes by the following technical solutions:

A kind of cast steel filled type Riser waste heat recovery device for coke oven, including tedge inner core, spiral bile duct, cast steel interstitital texture, heat-insulation layer and tedge outer housing, described tedge inner core and tedge upper flange, tedge lower flange composition coke oven coke oven uprising tube agent structure；Spiral bile duct is coiled in outside tedge inner core, and upper and lower end sets heat-exchanging water water inlet pipe and heat-exchanging water outlet pipe respectively；Cast steel interstitital texture is filled between tedge inner core and spiral bile duct, and is coated on by spiral bile duct and is formed with an overall hollow cylindrical structure；It is provided with heat-insulation layer and tedge outer housing outside cast steel interstitital texture, sets casting between cast steel interstitital texture with tedge inner core and follow closely fixing connection。

Compared with prior art, the beneficial effects of the utility model are:

1) being realized ascending tube crude-gas heat by the heat conduction structure of integral cast molding to pass to the water in spiral bile duct in the way of metal heat conduction, its heat transfer efficiency is high, high safety；

2) fixing by casting nail between tedge inner core and cast steel interstitital texture, it is ensured that it fits tightly。

Accompanying drawing explanation

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

Fig. 2 is casting die structure schematic diagram described in the utility model。

Fig. 3 is the I portion enlarged drawing in Fig. 2。

Fig. 4 is casting cycle schematic diagram described in the utility model。

In figure: 1. die cavity 18. steam vent 19. ingate 20. cross gate 21. rising head filled by tedge inner core 2. casting nail 3. tedge lower flange 4. spiral bile duct 5. cast steel interstitital texture 6. heat-insulation layer 7. tedge outer housing 8. tedge upper flange 9. heat-exchanging water outlet pipe 10. heat-exchanging water water inlet pipe 11. die cavity lower cover 12. die cavity skeleton 13. refractory cement 14. fire clay 15. high-temperature flame-proof coating 16. die cavity upper cover 17. cast steel

Detailed description of the invention

Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described further:

See Fig. 1, it it is structural representation of the present utility model, this utility model one cast steel filled type Riser waste heat recovery device for coke oven, coke oven coke oven uprising tube agent structure is formed including tedge inner core 1, spiral bile duct 4, cast steel interstitital texture 5, heat-insulation layer 6 and tedge outer housing 7, described tedge inner core 1 and tedge upper flange 8, tedge lower flange 3；Spiral bile duct 4 is coiled in outside tedge inner core 1, and upper and lower end sets heat-exchanging water water inlet pipe 10 and heat-exchanging water outlet pipe 9 respectively；Cast steel interstitital texture 5 is filled between tedge inner core 1 and spiral bile duct 4, and is coated on by spiral bile duct 4 and is formed with an overall hollow cylindrical structure；It is provided with heat-insulation layer 6 and tedge outer housing 7 outside cast steel interstitital texture 5, between cast steel interstitital texture 5 with tedge inner core 1, sets that casting nail 2 is fixing to be connected。

The manufacture method of this utility model a kind of cast steel filled type Riser waste heat recovery device for coke oven is as follows:

1) making mold, the agent structure of mold is made of cast iron, and including die cavity upper cover 16, die cavity skeleton 12 and die cavity lower cover 11, the hollow space formed after combining with tedge inner core 1 is cast steel and fills die cavity 17 (as shown in Figure 2)；Die cavity skeleton 12 is symmetrical split-type structural, the hole that split place is provided with mean for heat-exchanging water water inlet pipe and heat-exchanging water outlet pipe 9 stretches out；Die cavity upper cover 16, die cavity skeleton 12 and die cavity lower cover 11 are filled the inner surface of die cavity 17 and are set gradually refractory cement 13, fire clay 14 and high-temperature flame-proof coating 15 (as shown in Figure 3) from inside to outside for forming cast steel, and mold entire body is uniformly arranged steam vent 18；

2) making tedge inner core 1, cast nail 2 at tedge inner core 1 outer surface uniform welding, head of a nail side is outside；

3) mould assembles, and is first sleeved on outside tedge inner core 1 by spiral bile duct 4, then die cavity upper cover 16, die cavity skeleton 12 and die cavity lower cover 11 is set in outside tedge inner core 1 and fixes closing；

4) mold tilt assembled is placed so that it is axis and horizontal line angle are 15～30o, adopt downside casting, and be uniformly arranged the ingate that multiple height is different vertically；High-pressure water mist cooling is adopted in spiral bile duct 4 while cast；The temperature in spiral bile duct 4 is made to be maintained at 500～600 DEG C；

5), after casting cycle terminates, immediately with molten steel teeming 21, rising head 21 is positioned at mould peak place；When the molten steel in rising head 21 is unwatered after being full of rising head 21 by molten steel immediately；

6) cooling down after molding until cast steel, remove die cavity upper cover 16, die cavity skeleton 12 and die cavity lower cover 11, at cast steel arranged outside heat-insulation layer 6 and tedge outer housing 7, tedge lower flange 8 is fixed on tedge inner core 1 top, and tedge upper flange 3 is fixed in bottom；Namely cast steel filled type Riser waste heat recovery device for coke oven has manufactured。

The part cast steel filling being full of air in original device, on the basis of former spiral container tube-type coke oven tedge waste-heat recovery device, is replaced, not only retains the advantage that its safety is good, and safety is also greatly reinforced by this utility model。Heat exchange efficiency is greatly improved simultaneously, this is because cast steel interstitital texture 5 one aspect and tedge inner core 1 outer surface tightly fit together, again spiral bile duct 4 is tightly wrapped up simultaneously, achieve, by metal heat conduction, ascending tube crude-gas heat is passed to the water in spiral bile duct 4, heat transfer efficiency is high, again because spiral bile duct 4 developed area is more than jacket type tedge inner core 1 exterior surface area, so further increasing heat transfer efficiency。So this utility model is one both safety, the Riser waste heat recovery device for coke oven that the thermal efficiency is high again。

From longtime running, there is a potential factor reducing the thermal efficiency, that is, the problem that can tedge inner core 1 outer surface and cast steel interstitital texture 5 surface remain close contact。When just having cast, tedge inner core 1 is non-molten steel part, outside parcel molten steel, and after cooling, cast steel interstitital texture 5 can compress tedge inner core 1 firmly。But the work characteristics of coke oven coke oven uprising tube is coke oven often to be run 20 hours and just goes out once burnt, and the temperature of coke oven coke oven uprising tube just constantly repeatedly changes between room temperature and about 800 DEG C high temperature。When tedge inner core 1 temperature raises, volume increases, and cast steel interstitital texture 5 temperature is low, and volume increase amount is little, limits tedge inner core 1 and increases, and makes it produce plastic deformation namely to be compressed。When ambient temperature reduces, tedge inner core 1 also to shrink, thus volume diminishes, repeatedly will make generation gap between tedge inner core 1 and cast steel interstitital texture 5 for a long time, thus reducing heat transfer efficiency。For this, we arrange casting nail 2 more thick and fast at tedge inner core 1 outer surface, casting nail 2 ailhead one end are welded in tedge inner core 1 outer surface, the head of a nail is outside, stays in molten steel and be integrally forming with cast steel interstitital texture 5 during casting, thus tedge inner core 1 and cast steel interstitital texture 5 being firmly fixed together。

The work process of this utility model a kind of cast steel filled type Riser waste heat recovery device for coke oven is as follows:

Heat-exchanging water enters in spiral bile duct 4 from heat-exchanging water water inlet pipe 10, raw coke oven gas waste heat transfers heat to cast steel interstitital texture 5 through tedge inner core 1 barrel, heat is passed to spiral bile duct 4 by cast steel interstitital texture 5 again, and by rapid for the heat-exchanging water in spiral bile duct 4 heat temperature raising, the steam water interface after heat exchange transfers out from heat-exchanging water outlet pipe 9。

The processing of this utility model one cast steel filled type waste-heat recovery device gets up to acquire a certain degree of difficulty, when its difficult point is cast steel cast, high-temperature molten steel enters cast steel through ingate and fills die cavity 17, spiral bile duct 4 is caused and washes away, because spiral bile duct 4 wall is thin, under the washing away of high-temperature molten steel, it is easy to fusing。For this, we take following measures in casting cycle:

1) adopt inclined casting, ladder ingate is set, reduce and reduce just to the molten steel pressure at spiral bile duct 4 position at ingate place and flushing time；

2) in spiral bile duct 4, logical high-pressure water mist cools down, it is ensured that spiral bile duct 4 is not molten not to be leaked；

3) casting uses molten steel teeming 21 after terminating, and unwaters molten steel immediately, namely can guarantee that feeding, after pouring foundry goods is cleared up well again。

As shown in Figure 4, it is casting cycle schematic diagram described in the utility model。Casting cycle is: molten steel is come in from cross gate 20, first enter cast steel from the ingate 19 of foot and fill in die cavity 17, then enter cast steel from the ingate 19 of each height successively by order from low to high and fill in die cavity 17, spiral bile duct 4 and ingate 19 just to position first impacted by molten steel, but passing into the high-pressure water mist in spiral bile duct 4 from heat-exchanging water water inlet pipe 10 with the gas of certain pressure can play cooling effect to it simultaneously, so that spiral bile duct 4 is lowered the temperature, ensure that the place of being washed off by steel will not melt, ensure that in pipeline, temperature is maintained between 500～600 DEG C again simultaneously, prevent cold shut phenomenon；High-pressure water mist sprays from top heat-exchanging water outlet pipe 9 through spiral bile duct 4。

Critical process in this utility model a kind of cast steel fill-type tedge waste-heat recovery device manufacture process is casting。The casting of general cast steel is all adopt sand casting, not only needs a large amount of foundry sand, wastes molding sand resource, but also can cause the contaminated environment such as dust, and therefore we have employed semipermanent mold casting model。Common sand casting every time casting is required for repeat style, and semi-permanent mould can Reusability tens times。This utility model adopts cast iron to make mold bulk structure, refractory cement 13 is hung up at its die cavity side inner surface, hanging fire clay 14 on refractory cement 13, the inside brush refractory paint 15, (as shown in Figure 3) mold entire body is designed with steam vent 18。After cast molding cooling, bolt or the clamp of fixing die cavity upper and lower cover 16,11 and die cavity skeleton 12 are opened, take out foundry goods, refractory paint is coated on the surface of used upper and lower cover 16,11 and die cavity skeleton 12 inner refractory layer again, it is possible to continue mould assembling cast。

Claims

1. a cast steel filled type Riser waste heat recovery device for coke oven, it is characterized in that, including tedge inner core, spiral bile duct, cast steel interstitital texture, heat-insulation layer and tedge outer housing, described tedge inner core and tedge upper flange, tedge lower flange composition coke oven coke oven uprising tube agent structure；Spiral bile duct is coiled in outside tedge inner core, and upper and lower end sets heat-exchanging water water inlet pipe and heat-exchanging water outlet pipe respectively；Cast steel interstitital texture is filled between tedge inner core and spiral bile duct, and is coated on by spiral bile duct and is formed with an overall hollow cylindrical structure；It is provided with heat-insulation layer and tedge outer housing outside cast steel interstitital texture, sets casting between cast steel interstitital texture with tedge inner core and follow closely fixing connection。