CN210826048U

CN210826048U - Waste heat recovery device for ascending pipe of coke oven with variable-pitch spiral coil jacket

Info

Publication number: CN210826048U
Application number: CN201921864752.7U
Authority: CN
Inventors: 张锁龙; 邱明杰; 宋小龙
Original assignee: Jiangsu Ruiyier Environmental Protection Technology Co ltd
Current assignee: Jiangsu Ruiyier Environmental Protection Technology Co ltd
Priority date: 2019-11-01
Filing date: 2019-11-01
Publication date: 2020-06-23
Anticipated expiration: 2029-11-01

Abstract

The utility model provides a waste heat recovery device of a coke oven ascending pipe with a variable pitch spiral coil pipe jacket, which comprises an inner cylinder, a spiral coil pipe, a pouring body, an outer cylinder, a water inlet and a water outlet from inside to outside; furthermore, the water inlet and the water outlet penetrate through the pouring body to be connected with the outer barrel through flanges and are connected with the outside, the water inlet and the water outlet are connected with the outer barrel in a sealing mode, the screw pitch of the spiral coil is variable, and specifically the spiral coil is dense at the bottom and sparse at the top. The utility model has larger heat exchange area and excellent heat exchange effect; the pouring body can enable the inner cylinder and the outer cylinder to bear higher pressure, the thickness of the spiral coil pipe can be reduced, the cost is saved, and the heat exchange between the raw coke oven gas and soft water is more uniform.

Description

Waste heat recovery device for ascending pipe of coke oven with variable-pitch spiral coil jacket

Technical Field

The utility model belongs to the coking equipment field especially relates to a coke oven tedge waste heat recovery device.

Background

A large amount of waste heat can be generated in the coke production process, and from the balance distribution of the coking production process, the sensible heat of red coke accounts for 37 percent of the total waste heat, the sensible heat of raw gas of an ascending pipe accounts for 36 percent of the total waste heat, the waste gas of a flue of a coke oven accounts for 18 to 20 percent of the total waste heat, and the heat loss of the surface of a furnace body accounts for 11 percent of the total waste heat. Most coking plants adopt an ammonia water spraying mode to cool the raw gas, so that only ammonia water with the temperature of about 80 ℃ can be obtained finally, and a large amount of waste heat of the raw gas, water resources and electric power are wasted. Therefore, for coking enterprises, the research on the raw gas waste heat recovery technology not only can respond to national energy conservation and emission reduction, but also can bring remarkable economic benefits for the enterprises.

The current domestic main technology for recovering the waste heat of the raw gas mainly comprises the following steps: water jacket technology, heat-conducting oil jacket technology, heat pipe type heat exchange technology, waste heat boiler technology, semiconductor thermoelectric power generation test and the like. The technologies still have the defects of water leakage, coking and graphitization, high cost and the like. Therefore, the problems are solved, and a new waste heat recovery technology is developed, which is very important for energy conservation and emission reduction in the coking industry.

The utility model relates to a waste heat recovery device for a coke oven ascending pipe, which adopts a structure that a spiral coil pipe is sleeved with a jacket to recover waste heat.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a purpose, the utility model discloses a spiral coil presss from both sides cover coke oven tedge waste heat recovery device, the utility model discloses can show the heat transfer effect that promotes the heat exchanger to can attenuate equipment thickness, material saving cost.

In order to realize the aim, the waste heat recovery device of the ascending pipe of the coke oven with the spiral coil pipe jacket comprises an inner cylinder, a spiral coil pipe, a pouring body, an outer cylinder, a water inlet and a water outlet from inside to outside; furthermore, the water inlet and the water outlet penetrate through the pouring body to be connected with the outer barrel through flanges and are connected with the outside, the water inlet and the water outlet are connected with the outer barrel in a sealing mode, the screw pitch of the spiral coil is variable, and specifically the spiral coil is dense at the bottom and sparse at the top.

Furthermore, the inner wall of the inner cylinder is coated with a high-temperature resistant coating.

Furthermore, the circumferential section of the spiral coil pipe can be circular or semicircular.

Furthermore, the casting material is a metal material with good heat conductivity.

Furthermore, the outer wall of the outer barrel is wrapped with a heat insulation layer.

The utility model has the advantages that: the circumferential section of the spiral coil between the inner cylinder and the outer cylinder is circular or semicircular, the heat exchange area of the semicircular circumferential section is larger, and the heat exchange effect is better; the casting body material between the inner cylinder and the outer cylinder is aluminum and other materials with good heat conductivity, so that the heat exchange effect of the waste heat recovery device can be enhanced; metal materials are poured between the inner cylinder and the outer cylinder and are shaped, so that the spiral coil pipe can bear higher pressure, the thickness of the pipe can be reduced, and the material cost is saved; the structure can meet the heat exchange in medium-high pressure environment, and can generate higher economic benefit; the inner wall of the inner cylinder is coated with a high-temperature resistant coating which can effectively inhibit coking and graphitization of the inner wall of the inner cylinder; the screw pitch of the spiral coil pipe is dense at the lower part and sparse at the upper part, so that the waste heat recovery of the raw gas is more uniform.

Drawings

FIG. 1 is a schematic structural view of a waste heat recovery device of a coke oven riser with a variable pitch spiral coil jacket.

In the figure: 1-high temperature resistant coating, 2-water outlet, 3-inner cylinder, 4-spiral coil, 5-casting body, 6-outer cylinder, 7-water inlet and 8-heat insulation layer.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

The utility model discloses a spiral coil pipe presss from both sides cover coke oven tedge waste heat recovery device, as shown in figure 1, this kind of coke oven tedge waste heat recovery device has adopted the sleeve pipe structure, from inside to outside includes inner tube 3, spiral coil pipe 4, pouring body 5, urceolus 6, water inlet 7 and delivery port 2. The inner cylinder 3 is coated with a high temperature resistant coating 1, and a metal casting body 5 with good heat conductivity is cast and shaped between the inner cylinder 3 and the outer cylinder 6. The high-temperature raw gas passes through the inner cylinder 3 from bottom to top, exchanges heat with normal-temperature soft water entering from the water inlet 7, and generates medium-high pressure water vapor which is discharged from the water outlet 7 and collected for use. The screw pitch of the spiral coil 4 is dense at the bottom and sparse at the top, so that the waste heat of the raw coke oven gas can be recovered more uniformly.

Wherein, the circumferential cross section of the spiral coil pipe 4 between the inner and outer cylinders can be a semicircle, and the metal casting body 5 with better heat conductivity between the inner and outer cylinders can greatly increase the heat exchange area, and can enhance the heat exchange effect of the waste heat recovery device. The casting body 5 between the inner cylinder and the outer cylinder can enable the inner cylinder and the outer cylinder to bear higher pressure, the thickness of the spiral coil pipe 4 can be reduced, the manufacturing cost of the waste heat recovery device is saved, the structure can meet the medium-high pressure heat exchange environment, medium-high pressure steam can be generated, and higher economic benefits can be generated. The inner wall of the inner cylinder is coated with a high-temperature resistant coating which can effectively inhibit coking phenomenon in the heat exchange process of raw coke oven gas. The outer wall of the outer barrel 6 is further wrapped with the heat preservation layer 8, heat loss can be effectively reduced, and the waste heat recovery effect is good.

Claims

1. The utility model provides a spiral coil pipe presss from both sides cover coke oven tedge waste heat recovery device which characterized in that: the waste heat recovery device of the coke oven ascending pipe comprises an inner cylinder, a spiral coil pipe, a pouring body, an outer cylinder, a water inlet and a water outlet from inside to outside; the water inlet and the water outlet penetrate through the pouring body and the outer barrel to be connected with the outside through the flange, and the water inlet, the water outlet and the outer barrel are hermetically connected and characterized in that: the spiral coil has variable pitch, specifically, the lower part is dense and the upper part is sparse.

2. The spiral coil jacket coke oven riser waste heat recovery device of claim 1, wherein: the inner wall of the inner cylinder is coated with a high-temperature resistant coating.

3. The spiral coil jacket coke oven riser waste heat recovery device of claim 1, wherein: the circumferential section of the spiral coil pipe can be circular or semicircular.

4. The spiral coil jacket coke oven riser waste heat recovery device of claim 1, wherein: the casting material is a metal material with good heat-conducting property.

5. The spiral coil jacket coke oven riser waste heat recovery device of claim 1, wherein: the outer wall of the outer barrel is further wrapped with a heat insulation layer.