CN214383780U

CN214383780U - Residual heat recovery system for molten slag

Info

Publication number: CN214383780U
Application number: CN202120522780.1U
Authority: CN
Inventors: 黄君萍
Original assignee: Wuxi Dogfang Environmental Engineering Design Institute Co ltd
Current assignee: Wuxi Dogfang Environmental Engineering Design Institute Co ltd
Priority date: 2021-03-12
Filing date: 2021-03-12
Publication date: 2021-10-12
Anticipated expiration: 2031-03-12

Abstract

The utility model discloses a waste heat recovery system for molten slag, which comprises a feeding box, wherein an auger is arranged in the feeding box, and the right end of the auger is connected with a first heat accumulator; a heat exchange water pipe is laid on the inner wall of the feeding box, a first water inlet pipe is arranged on the right side wall of the feeding box, a first water outlet pipe is arranged on the left side wall of the feeding box, and the other end of the first water outlet pipe is communicated with a steam generating bubble; the top of the steam generating bubble is communicated with a second heat accumulator; the left end of the feeding box is communicated with a material guide pipe, the other end of the material guide pipe is communicated with a heat exchange box, and a plurality of heat conducting grooves are formed in the heat exchange box; the heat exchange air pipe is laid on the inner wall of the heat exchange box, the air inlet pipeline is arranged in the middle of the heat exchange box, the discharge port is formed in the bottom end face of the heat exchange box, the air outlet pipe is arranged above the heat exchange box, and the other end of the air outlet pipe is communicated with the steam generating bubbles. The utility model has the advantages of high safety, simple structure, high heat recovery efficiency, low cost and effective utilization in industrial application.

Description

Residual heat recovery system for molten slag

Technical Field

The utility model relates to a resource recovery technical field, more specifically relate to a melting sediment waste heat recovery system.

Background

With increasingly intensified international competition and continuous shortage of energy, the steel industry faces a plurality of environmental issues that maintain the strategy of sustainable development. Among them, the efficient and high-grade recovery of the blast furnace slag waste heat has become a technological bottleneck to be broken through in view of the above-mentioned problems of the recovery of the blast furnace slag waste heat. Many utilization methods are proposed by domestic and foreign scientists, such as a cooling drum method slag sheet solidification waste heat recovery process, a continuous casting and rolling method slag flat solidification waste heat recovery process, a mechanical stirring method slag granulation waste heat recovery process, a rotary rolling method slag granulation waste heat recovery process and the like. However, these methods are inefficient in heat recovery and cannot be effectively used for industrial applications. Therefore, a recycling system capable of improving the recycling efficiency of waste heat is needed.

Disclosure of Invention

The utility model aims to provide a waste heat recovery system of molten slag, which solves the problems that the existing heat recovery system has low heat recovery efficiency and can not be effectively used in industrial application; to improve the recovery rate of the heat recovery system in industrial application.

In order to solve the technical problem, the utility model adopts the following technical proposal.

A molten slag waste heat recovery system comprises a feeding box, wherein a feeding hopper is arranged above the feeding box, an auger for crushing molten slag is arranged in the feeding box, and the right end of the auger is connected with a first heat accumulator for storing heat; a heat exchange water pipe for heat exchange is laid on the inner wall of the feeding box, the heat exchange water pipe penetrates through the right side wall of the feeding box and is provided with a first water inlet pipe, the heat exchange water pipe penetrates through the left side wall of the feeding box and is provided with a first water outlet pipe, and the other end of the first water outlet pipe is communicated with a steam generating bubble with a water outlet pipe arranged in the middle; the top of the steam generating bubble is communicated with a second heat accumulator through a steam outlet pipe; the left end of the feeding box is communicated with a material guide pipe used for guiding out crushed molten slag, the other end of the material guide pipe is communicated with the heat exchange box, and a plurality of rows of heat conducting grooves which are horizontally arranged and internally communicated with heat exchange air pipes and are internally provided with hollow cavities are arranged in the heat exchange box; the heat transfer tuber pipe has been laid to the inner wall of heat transfer case, and the middle part of heat transfer case is equipped with the intake stack who takes induced draft fan, be used for providing the air for the heat transfer tuber pipe, and the discharge gate that is used for deriving the melting sediment is offered to the bottom face of heat transfer case, and the top of heat transfer case is equipped with and is used for deriving the intraductal hot-blast tuber pipe of going out of heat transfer, and the other end intercommunication that goes out the tuber pipe produces the upper portion of vapour bubble and goes out the vertical extension of tuber pipe to the mouth of pipe and be located the lower part of producing the vapour bubble.

Further optimize technical scheme, the bull stick endotheca of auger is equipped with the heat conduction pole that is used for transmitting the heat.

Further optimize technical scheme, the outside of feeding case is equipped with the heat preservation that prevents heat dissipation.

According to the technical scheme, the heat conduction grooves are arranged in an inverted V shape and are positioned between two adjacent rows of heat conduction grooves in a staggered manner.

According to the technical scheme, a pipeline communicated with the heat exchange air pipe is arranged on the pipe wall of the material guide pipe.

According to the technical scheme, heat insulation materials are arranged outside the first water outlet pipe, the material guide pipe, the heat exchange box, the air outlet pipe and the steam outlet pipe.

Due to the adoption of the technical scheme, the utility model has the following technical progress.

The utility model provides a waste heat recovery system for molten slag, which enables heat exchange between normal temperature air and high temperature molten slag to generate hot gas, and directly stores heat through a heat conducting rod, and the two modes are combined to improve the heat exchange efficiency; and the water in the system can be recycled, so that the cost of heat recovery is reduced. The utility model has the advantages of high safety, simple structure, high heat recovery efficiency, low cost and effective utilization in industrial application.

Drawings

Fig. 1 is a schematic structural view of the present invention;

wherein: 1. the heat-exchange device comprises a feeding box, 12, a heat-insulation layer, 13, a first water outlet pipe, 14, a first water inlet pipe, 2, a packing auger, 3, a heat-conducting rod, 4, a heat-exchange water pipe, 5, a first heat accumulator, 6, a second heat accumulator, 61, a steam outlet pipe, 7, steam generating bubbles, 71, a water drain pipe, 8, a material guide pipe, 81, a heat-exchange air pipe, 82, a steam outlet pipe, 9, a heat-exchange box, 91, an air inlet pipeline, 92, a discharge port, 10 and a heat-conducting groove.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

The melting slag waste heat recovery system is shown in fig. 1 and comprises a feeding box 1, a heat insulation layer 12, a first water outlet pipe 13, a first water inlet pipe 14, a packing auger 2, a heat conduction rod 3, a heat exchange water pipe 4, a first heat accumulator 5, a second heat accumulator 6, a steam outlet pipe 61, a steam generating bubble 7, a water outlet pipe 71, a material guide pipe 8, a heat exchange air pipe 81, a steam outlet pipe 82, a heat exchange box 9, an air inlet pipeline 91, a material outlet 92 and a heat conduction groove 10.

A feeding hopper is arranged above the feeding box 1 and used for adding the molten slag into the system and carrying out primary heat exchange on the molten slag in the feeding box 1. The outside of feeding box 1 is equipped with heat preservation 12, prevents the loss of heat. An auger 2 connected with a motor is arranged in the feeding box 1 and is used for crushing the molten slag. The rotating rod inner sleeve of auger 2 is equipped with heat conducting rod 3 for transmitting heat, and the right-hand member of auger 2 is connected with first heat accumulator 5 for store the heat conducted by heat conducting rod 3.

And a heat exchange water pipe 4 is laid on the inner wall of the feeding box 1 and used for absorbing heat in the molten slag. The heat exchange water pipe 4 penetrates through the right side wall of the feeding box 1 and is provided with a first water inlet pipe 14 for providing low-temperature water for heat exchange; the heat exchange water pipe 4 penetrates through the left side wall of the feeding box 1 and is provided with a first water outlet pipe 13 for outputting hot water after heat exchange. The other end of the first water outlet pipe 13 is communicated with the steam generating bubble 7, the top of the steam generating bubble 7 is communicated with the second heat accumulator 6 through a steam outlet pipe 61, and the middle part of the steam generating bubble 7 is provided with a water outlet pipe 71 used for discharging redundant unvaporized water out of the steam generating bubble 7. The water discharge pipe of the steam generating bubble 7 can be connected with the first water inlet pipe 14, so that the water source is recycled, and the aims of saving resources and reducing cost are fulfilled.

The left end of the feeding box 1 is communicated with a material guide pipe 8, and a pipeline communicated with a heat exchange air pipe 81 is arranged on the pipe wall of the material guide pipe 8, so that the heat loss in the material guide process is reduced; the other end of the material guide pipe 8 is communicated with a heat exchange box 9 and is used for guiding the crushed molten slag out of the heat exchange box 9 for further heat exchange. A heat exchange air pipe 81 is laid on the inner wall of the heat exchange box 9, and an air inlet pipeline 91 with a draught fan is arranged at the lower part of the heat exchange box 9 and used for providing an air source for the heat exchange air pipe 81; a discharge hole 92 for guiding out the molten slag is formed in the bottom end surface of the heat exchange box 9; an air outlet pipe 82 for guiding out hot air in the heat exchange air pipe 81 is arranged above the heat exchange box 9, the other end of the air outlet pipe 82 is communicated with the upper part of the steam generating bubble 7, and the air outlet pipe 82 is vertical to the lower part of the steam generating bubble at the pipe orifice. The heat exchange box 9 is provided with a plurality of rows of heat conducting grooves 10 with hollow cavities inside, the heat conducting grooves 10 are inverted V-shaped and are positioned between the heat conducting grooves 10 of two adjacent rows in a staggered distribution. The heat conduction grooves 10 are all horizontally arranged and are all communicated with the heat exchange air pipes 81.

The first water outlet pipe 13, the material guide pipe 8, the heat exchange box 9, the air outlet pipe 82 and the steam outlet pipe 61 are all provided with heat insulation materials outside, so that the heat insulation effect is enhanced, and heat loss is prevented.

When the utility model is actually used, the packing auger 2 and the draught fan are started, the water outlet pipe 71 is communicated with the first water inlet pipe 14, and the cooled water can enter the system again to absorb heat and vaporize; and the first water inlet pipe 14 is communicated with a water source to supplement the water quantity in the system in time, so that the gas-liquid balance is ensured. Adding the high-temperature molten slag into a feeding box 1 from a feeding hopper, and crushing the high-temperature molten slag by using a packing auger 2; meanwhile, the rotating rod of the packing auger 2 is heated, heat is transmitted to the heat conducting rod 3 in the rotating rod, and the heat conducting rod 3 transmits the heat into the first heat accumulator 5; meanwhile, the water in the heat exchange water pipe 4 is subjected to heat exchange, the water is vaporized to generate steam along with the rise of the temperature, the water and the steam after the heat exchange upwards enter the steam generating bubble 7 through the first water pipe, and gas-liquid separation is carried out in the steam generating bubble 7. Then, the molten slag enters the heat exchange box 9 through the material guide pipe 8, contacts the heat conduction groove 10 in the falling process in the heat exchange box 9, exchanges heat with the air in the heat conduction groove 10 and the heat exchange air pipe, and moves upwards through the air outlet pipe 82 along with the rising of the air temperature to enter the steam generating bubble 7, and hot air in the steam generating bubble 7 further heats water and then carries out gas-liquid separation. The steam in the steam generating bubble 7 is stored in the second heat accumulator 6 through the steam outlet pipe 61 or is directly applied to heating of other equipment.

Claims

1. The utility model provides a melting slag waste heat recovery system which characterized in that: the device comprises a feeding box (1) with a feeding funnel arranged above, wherein an auger (2) used for crushing molten slag is arranged in the feeding box (1), and the right end of the auger (2) is connected with a first heat accumulator (5) used for storing heat; a heat exchange water pipe (4) for heat exchange is laid on the inner wall of the feeding box (1), the heat exchange water pipe (4) penetrates through the right side wall of the feeding box (1) to be provided with a first water inlet pipe (14), the heat exchange water pipe (4) penetrates through the left side wall of the feeding box (1) to be provided with a first water outlet pipe (13), and the other end of the first water outlet pipe (13) is communicated with a steam generating bubble (7) with a water outlet pipe (71) in the middle; the top of the steam generating bubble (7) is communicated with a second heat accumulator (6) through a steam outlet pipe (61); the left end of the feeding box (1) is communicated with a material guide pipe (8) used for guiding out crushed molten slag, the other end of the material guide pipe (8) is communicated with a heat exchange box (9), and a plurality of rows of heat conduction grooves (10) which are horizontally arranged and internally communicated with heat exchange air pipes (81) and are internally provided with hollow cavities are arranged in the heat exchange box (9); heat transfer tuber pipe (81) have been laid to the inner wall of heat transfer case (9), and the middle part of heat transfer case (9) is equipped with the area draught fan, be used for providing intake stack (91) of air for heat transfer tuber pipe (81), discharge gate (92) that are used for deriving the melting sediment are offered to the bottom face of heat transfer case (9), the top of heat transfer case (9) is equipped with and is used for deriving hot-blast air-out pipe (82) in heat transfer tuber pipe (81), and the other end intercommunication of air-out pipe (82) produces the upper portion of vapour bubble (7) and goes out the vertical lower part that is located the vapour bubble of producing to the mouth of pipe (82) of extending.

2. The molten slag waste heat recovery system of claim 1, wherein: the rotating rod inner sleeve of the packing auger (2) is provided with a heat conducting rod (3) for transmitting heat.

3. The molten slag waste heat recovery system according to claim 1, characterized in that: and a heat insulation layer (12) for preventing heat loss is arranged outside the feeding box (1).

4. The molten slag waste heat recovery system according to claim 1, characterized in that: the heat conduction grooves (10) are arranged in an inverted V shape and are positioned between the heat conduction grooves (10) in two adjacent rows in a staggered manner.

5. The molten slag waste heat recovery system according to claim 1, characterized in that: and a pipeline communicated with the heat exchange air pipe (81) is arranged on the pipe wall of the material guide pipe (8).

6. The molten slag waste heat recovery system according to claim 1, characterized in that: and heat insulation materials are arranged outside the first water outlet pipe (13), the material guide pipe (8), the heat exchange box (9), the air outlet pipe (82) and the steam outlet pipe (61).