A steel slag hot stew low-pressure steam recycling device

Abstract

The utility model discloses a kind of steel slag hot braising low-pressure steam recycling device, including sludge pot, spray pipe and spray head, the spray pipe is placed in the upper end of sludge pot, and the lower end of spray pipe is equipped with spray head at equal intervals, the distal end of the spray head is fixedly connected with support block, the right end of filter box is sequentially provided with regenerator, ejector and heat exchanger from left to right, and heat exchanger is connected with external drying kiln.This steel slag hot braising low-pressure steam recycling device increases the spraying area of steel slag, achieves better cooling effect, in addition, a large amount of low-grade steam generated in steel slag hot braising process is recycled to steel slag briquetting process drying kiln, which can reduce energy waste, protect the surrounding ecological environment, reduce production cost, improve economic benefit, by increasing steam recovery and heat exchange device, the rational use of low-grade steam is realized, the reutilization rate of heat energy is improved, and thermal pollution and noise pollution are effectively reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of low-pressure steam recovery from hot slag quenching, specifically a device for recovering and utilizing low-pressure steam from hot slag quenching. Background Technology

[0002] In today's steel industry, many industrial production processes generate a large amount of low-quality waste heat. If this waste heat is directly discharged, it will cause huge energy waste. By adding a waste heat recovery system, the low-quality steam can be reused in other industrial production processes, thereby improving the utilization efficiency of the entire energy system.

[0003] However, steel enterprises often use water spraying to cool steel slag during the hot slag quenching process. The effect of spraying cooling needs to be improved. Moreover, a large amount of low-quality steam is generated during the entire cooling and hot quenching process. Currently, this steam is released into the air without treatment, resulting in a large waste of energy and causing thermal and noise pollution to the surrounding environment.

[0004] To address these issues, we propose a low-pressure steam recovery and utilization device for hot slag quenching. Utility Model Content

[0005] The purpose of this invention is to provide a low-pressure steam recovery and utilization device for steel slag hot curing, in order to solve the problem mentioned in the background art that steel enterprises often use water spray cooling to cool steel slag in the hot curing process. The effect of spray cooling needs to be improved. Moreover, a large amount of low-quality steam is generated in the entire cooling and hot curing process. Currently, this part of the steam is released into the air without treatment, resulting in a large waste of energy and causing thermal and noise pollution to the surrounding environment.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a steel slag hot smelting low-pressure steam recovery and utilization device, comprising a slag smelting tank, a spray pipe, and a nozzle;

[0007] Also includes:

[0008] A spray pipe is placed at the upper end of the slag tank, and spray nozzles are installed at equal intervals at the lower end of the spray pipe. A support block is fixedly connected to the far end of the spray nozzle, and a sliding structure is formed between the support block and the annular track fixed inside the slag tank.

[0009] A filter box is provided at the upper right end of the slag tank, and a drain trough is provided at the lower end of the filter box. A filter screen is inserted and installed in the middle of the filter box. A heat accumulator, an ejector and a heat exchanger are arranged sequentially from left to right at the right end of the filter box, and the heat exchanger is connected to the external drying kiln.

[0010] Preferably, the upper end of the spray pipe is connected to a flexible hose, and the spray pipe is connected to an external water pump through the flexible hose.

[0011] Preferably, an electric telescopic rod is installed on the top of the slag-sealing tank, and a movable connecting block is fixedly connected to the output end of the electric telescopic rod. The electric telescopic rod pushes the movable connecting block to move left and right on the top of the slag-sealing tank.

[0012] Preferably, the left hinge of the movable connecting block is connected to a movable connecting sleeve, and a movable connecting rod is provided through the middle of the movable connecting sleeve, and the movable connecting sleeve and the movable connecting rod form a sliding structure.

[0013] Preferably, a connecting vertical rod is fixedly connected to the front end of the movable connecting rod, and a spray pipe is fixedly connected to the lower end of the connecting vertical rod;

[0014] The movable connecting rod drives the connecting vertical rod to rotate and connect to the upper end of the slag tank.

[0015] Preferably, the filter box and the filter screen are limited by fastening bolts that pass through the front and rear sides of the lower end of the filter screen.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: The steel slag hot quenching low-pressure steam recovery and utilization device rotates at the upper end of the slag quenching tank by connecting the vertical rod, which drives the spray pipe and nozzle to reciprocate inside the slag quenching tank, increasing the spraying area on the steel slag and achieving a better cooling effect. Moreover, the generated steam can be filtered through a filter screen. In addition, a large amount of low-grade steam generated in the steel slag hot quenching process is recovered and utilized in the drying kiln of the steel slag briquetting process, which can reduce energy waste, protect the surrounding ecological environment, reduce production costs, and improve economic efficiency. By adding steam recovery and heat exchange devices, the rational utilization of low-grade steam is realized, the amount of steam emissions is reduced, the heat energy reuse rate is improved, and thermal pollution and noise pollution are effectively reduced.

[0017] 1. Equipped with spray pipes, nozzles, and connecting vertical rods, the spray pipes and nozzles rotate at the top of the slag-sealing tank via the connecting vertical rods, thereby increasing the spraying area on the steel slag and achieving a better cooling effect.

[0018] 2. It is equipped with a filter box and a filter screen. The filter screen is inserted and installed in the middle of the filter box. Through the filter screen, impurities in the steam can be filtered out, and the filtered impurities can be discharged to the outside through the drain tank.

[0019] 3. It is equipped with a heat accumulator, ejector and heat exchanger. The heat exchanger is connected to the external drying kiln. Through the setting of the heat accumulator, ejector and heat exchanger and drying kiln, energy waste can be effectively reduced, the surrounding ecological environment can be protected, production costs can be reduced and economic benefits can be improved. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a front view sectional view of the slag tank, spray pipe and nozzle of this utility model;

[0022] Figure 3 This is a top view schematic diagram of the spray pipe, nozzle, support block, and annular track of this utility model;

[0023] Figure 4 This is a bottom-view sectional view of the spray pipe, support block, and annular track of this utility model.

[0024] Figure 5 This is a rear view structural diagram of the spray pipe, nozzle, connecting vertical rod, movable connecting sleeve, and movable connecting rod of this utility model.

[0025] Figure 6 This is a bottom view of the filter box and filter screen of this utility model;

[0026] Figure 7 This is an exploded view of the filter box, filter screen, and filter screen of this utility model;

[0027] Figure 8 This is a schematic diagram of the heat recovery process structure of this utility model.

[0028] In the diagram: 1. Slag tank; 2. Spray pipe; 3. Spray head; 4. Hose; 5. Support block; 6. Circular track; 7. Electric telescopic rod; 8. Movable connecting block; 9. Movable connecting sleeve; 10. Movable connecting rod; 11. Connecting vertical rod; 12. Filter box; 13. Drainage trough; 14. Filter screen; 15. Fastening bolt; 16. Heat accumulator; 17. Ejector; 18. Heat exchanger. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figures 1-8 .

[0031] To address the shortcomings of existing technologies in the hot slag cooling process of steel enterprises, which often uses water spraying for cooling, but whose cooling efficiency needs improvement and generates a large amount of low-quality steam during the cooling and hot slag cooling process, this solution addresses these issues by providing a low-pressure steam recovery and utilization device for steel slag hot slag. This device is currently untreated and directly vented into the atmosphere, resulting in significant energy waste and causing thermal and noise pollution to the surrounding environment. The system is equipped with a slag tank 1, a spray head 3, a heat accumulator 16, an ejector 17, and a heat exchanger 18. The spray pipe 2 is placed at the upper end of the slag tank 1, and the spray head 3 is installed at equal intervals at the lower end of the spray pipe 2. The far end of the spray head 3 is fixedly connected to a support block 5, and the support block 5 and the annular track 6 fixed inside the slag tank 1 form a sliding structure. The upper right end of the slag tank 1 is provided with a filter box 12, and the lower end of the filter box 12 is provided with a drain trough 13. A filter screen 14 is inserted and installed in the middle of the filter box 12.

[0032] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the steel slag is located at the bottom of the slag-sealing tank 1. When the steel slag is sprayed for cooling, the spray pipe 2 is connected to an external water pump through the hose 4. The water pump draws cooling water through the hose 4 and the spray pipe 2, and sprays it downwards onto the steel slag through the nozzle 3, thereby achieving cooling of the steel slag. During the spraying process, by activating the electric telescopic rod 7 installed on the top of the slag-sealing tank 1, the electric telescopic rod 7 pushes the movable connecting block 8 to move left and right on the top of the slag-sealing tank 1. At this time, the movable connecting block 8 and the movable connecting sleeve 9 rotate, thereby causing the movable connecting sleeve 9 and the movable connecting rod 10 to slide. The movable connecting rod 10 is fixedly connected to the front of the connecting vertical rod 11. The movable connecting rod 10 drives the connecting vertical rod 11 to rotate at the upper end of the slag tank 1. The lower end of the connecting vertical rod 11 is fixedly connected to the spray pipe 2. The connecting vertical rod 11 drives the spray pipe 2 and the nozzle 3 to reciprocate in the slag tank 1, thereby increasing the actual spray area and achieving a better cooling effect. Moreover, the far end of the spray pipe 2 is fixedly connected to the support block 5. The spray pipe 2 drives the support block 5 to slide between the annular track 6 fixed inside the slag tank 1, thereby improving the stability of the spray pipe 2 during rotation.

[0033] like Figure 6 and Figure 7 As shown, a large amount of steam is generated during the spray cooling process. The steam enters the filter box 12 and is filtered by the filter screen 14. Impurities in the steam can be removed. The filter screen 14 can also be disassembled and cleaned by loosening the fastening bolts 15 between the filter screen 14 and the filter box 12. At the same time, the filtered impurities are discharged to the outside through the discharge tank 13.

[0034] In addition, a heat accumulator 16, an ejector 17, and a heat exchanger 18 are respectively installed on the right end of the filter box 12. The heat exchanger 18 is connected to the external drying kiln and an external blower. The steam produced in the slag tank 1 is supplied externally through pipelines, and the external supply is divided into two branches. The first branch is connected to the external heating network through a pipeline. In winter, when the pressure in the main pipeline of the steam discharged from the slag tank 1 is >0.2MPa, the heating electric valve opens, and the steam is supplied to external heating users. The second branch is connected to the heat accumulator 16 through a pipeline to buffer the steam discharged from the slag tank. The buffered and pressure-stabilized steam is connected to the ejector 17 through a pipeline for pressurization treatment. Air enters the hot flow side of heat exchanger 18 through a pipeline. After being pressurized by a blower, the air is connected to heat exchanger 18 through a pipeline and enters the cold flow side of heat exchanger 18, where it undergoes convective heat exchange with the hot flow side. After heat exchange, the hot air from 18 enters the drying kiln through a pipeline to dry industrial products. During the heat exchange process, the condensate produced is centrally recovered and treated through a condensate recovery device. Moreover, the entire reuse and recovery system is equipped with temperature, pressure, and flow monitoring and remote control, which enables a short process flow, mature equipment, and a high degree of automation. This achieves the rational utilization of low-grade steam, reduces steam emissions, improves the reuse rate of thermal energy, and effectively reduces thermal and noise pollution.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low-pressure steam recovery and utilization device for hot slag quenching, comprising a slag quenching tank (1), a spray pipe (2) and a nozzle (3); Its features are, Also includes: Spray pipe (2), the spray pipe (2) is placed at the upper end of the slag tank (1), and spray nozzles (3) are installed at equal intervals at the lower end of the spray pipe (2). A support block (5) is fixedly connected to the far end of the spray nozzle (3), and a sliding structure is formed between the support block (5) and the annular track (6) fixed inside the slag tank (1). A filter box (12) is provided at the upper right end of the slag tank (1), and a drain trough (13) is provided at the lower end of the filter box (12). A filter screen (14) is inserted and installed in the middle of the filter box (12). A heat accumulator (16), an ejector (17) and a heat exchanger (18) are arranged sequentially from left to right at the right end of the filter box (12), and the heat exchanger (18) is connected to the external drying kiln.

2. The steel slag hot quenching low-pressure steam recovery and utilization device according to claim 1, characterized in that: The upper end of the spray pipe (2) is connected to a hose (4), and the spray pipe (2) is connected to an external water pump through the hose (4).

3. The steel slag hot quenching low-pressure steam recovery and utilization device according to claim 1, characterized in that: An electric telescopic rod (7) is installed on the top of the slag-sealing tank (1), and a movable connecting block (8) is fixedly connected to the output end of the electric telescopic rod (7). The electric telescopic rod (7) pushes the movable connecting block (8) to move left and right on the top of the slag-sealing tank (1).

4. The steel slag hot quenching low-pressure steam recovery and utilization device according to claim 3, characterized in that: The movable connecting block (8) is hinged to a movable connecting sleeve (9) on its left side, and a movable connecting rod (10) is provided through the middle of the movable connecting sleeve (9). The movable connecting sleeve (9) and the movable connecting rod (10) form a sliding structure.

5. The steel slag hot quenching low-pressure steam recovery and utilization device according to claim 4, characterized in that: The front end of the movable connecting rod (10) is fixedly connected to a connecting vertical rod (11), and the lower end of the connecting vertical rod (11) is fixedly connected to a spray pipe (2). The movable connecting rod (10) drives the connecting vertical rod (11) to rotate and connect to the upper end of the slag tank (1).

6. The steel slag hot quenching low-pressure steam recovery and utilization device according to claim 1, characterized in that: The filter box (12) and the filter screen (14) are limited by fastening bolts (15) that pass through the front and rear sides of the lower end of the filter screen (14).

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