Slag pool retaining wall for steel slag treatment and waste heat recovery device of slag pool retaining wall

Abstract

The utility model discloses a slag pool retaining wall for steel slag treatment and a waste heat recovery device thereof, the slag pool retaining wall comprises a pool wall, a plurality of protective steel billets, a plurality of profile steels, a heat exchange water discharge pipe and a plurality of steel plate embedded parts, the steel plate embedded parts are poured on one side, facing steel slag, of the pool wall, and the protective steel billets are connected with the corresponding steel plate embedded parts through the profile steels in a welding manner; compared with the prior art, chemical erosion damage and thermal erosion damage of the retaining wall can be effectively avoided, the retaining wall can meet the quality requirements of hot water production, domestic hot water or other waste heat recovery measures, on-site manual operation is avoided, manpower is saved, and the intelligent degree is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to metallurgical manufacturing field especially relates to a slag pool retaining wall for steel slag treatment and its waste heat recovery device. BACKGROUND

[0002] Steel slag is the main solid waste produced in steelmaking, and there are many methods for treating steel slag in China. At present, the main methods for treating steel slag are hot stewing and hot splashing. In order to prevent the slag pool retaining wall from being hit, bumped and impacted by high-temperature steel slag and loaders during operation, steel billets are usually arranged in the retaining wall to protect the slag pool. The existing hot splashing slag pool is provided with retaining walls on three sides, and the existing hot stewing slag pool is provided with retaining walls on four sides. The retaining walls are generally made of anti-permeation and heat-resistant concrete. When the concrete structure retaining wall and the steel billets are designed, heavy slag or air is usually filled as a heat insulation layer, and the steel billets are usually fixed by bolt hanging.

[0003] The existing protective steel billets of the slag pool are usually fixed by bolt hanging. During use, the protective steel billets and the bolts are directly in contact with high-temperature steel slag. During the process of water hitting and slag smothering, high-temperature steam is generated. The steel billets and the fastening bolts are repeatedly subjected to thermal expansion and cold contraction. The fastening bolts are broken or deformed, which not only causes the protective steel billets to fall off frequently, but also causes the mixture of steam and water and the water and slag hydration reaction substances to continuously chemically erode the retaining wall through the fastening bolt sleeve, thereby affecting the service life of the slag pool.

[0004] The existing concrete structure pool wall and the steel billets are usually filled with heavy slag or air as a heat insulation layer. After long-term use, the heat insulation layer cannot play a heat insulation role. The heat of the high-temperature steel slag is continuously transferred to the retaining wall through the protective steel billets and the filling layer, resulting in thermal erosion, causing the wall body to crack, affecting the strength of the retaining wall, and further intensifying the chemical erosion. SUMMARY

[0005] The utility model discloses a kind of steel slag treatment slag pool retaining wall and its waste heat recovery device, which can effectively avoid the chemical erosion damage and thermal erosion damage of retaining wall.

[0006] To achieve the above object, the utility model provides a kind of slag pool retaining wall for steel slag treatment, including pool wall, several protective steel billets, several profile steels, heat exchange water drain pipe and several steel plate embedded parts, the steel plate embedded part is poured in the pool wall side towards steel slag, the protective steel billet and corresponding several steel plate embedded parts are all connected by profile steel welding, and heat exchange water drain pipe is equipped between the pool wall and protective steel billet.

[0007] Preferably, the protective steel billet, the profile steel and the steel plate embedded part are all provided lengthwise.

[0008] As preferred, the bottom elevation of the protective steel billet, section steel and steel plate embedded part is flush with the bottom of the pool wall, in order to prevent high-temperature steel slag from entering between the pool wall and the protective steel billet from the bottom, and the heat exchange water discharge pipe is broken.

[0009] As preferred, the top elevation of the protective steel billet is flush with the top of the pool wall, and the top elevation of the section steel and steel plate embedded part is lower than the top of the pool wall and has a difference of greater than or equal to 150mm, and a top space is reserved for laying in the cold water pipe.

[0010] As preferred, the spacing between the two adjacent section steels is equivalent to the width b of the protective steel billet.

[0011] As preferred, the top of the two adjacent protective steel billets is closed by welding a cast steel plate.

[0012] As preferred, the pool wall is made of anti-permeation heat-resistant concrete, and is a vertical reinforced concrete wall.

[0013] A waste heat recovery device, comprising a plurality of slag pools, a cold water inlet pipe, a hot water outlet pipe, a plurality of electric valves and a plurality of temperature transmitters, the slag pool comprises the slag pool retaining wall described above, the input end of the heat exchange water discharge pipe is communicated with the cold water inlet pipe through the cold water inlet pipe, the output end of the heat exchange water discharge pipe is communicated with the hot water outlet pipe through the hot water outlet pipe, the cold water inlet pipe is provided with a temperature transmitter and an electric valve in sequence along the water flow direction, the hot water outlet pipe is provided with an electric valve and a temperature transmitter in sequence along the water flow direction, and the electric valve and the temperature transmitter are electrically connected with the automatic control system.

[0014] The beneficial effects of the utility model are: 1. the section steel and steel plate embedded part are connected with the slag pool pool wall and the protective steel billet through welding, instead of fastening bolts, which greatly improves the use stability of the protective steel billet and effectively avoids the chemical corrosion damage of the retaining wall.

[0015] 2. the heat exchange water discharge pipe is used to replace the commonly used heavy slag or air, which can make the heat insulation layer play a long-term heat insulation role, recover a large amount of high-temperature steel slag heat, and effectively avoid the thermal erosion damage of the retaining wall.

[0016] 3. the temperature of the hot water outlet pipe is automatically adjusted through the cooperation of the automatic control system, the electric valve and the temperature transmitter, so that it meets the quality requirements of production hot water, domestic hot water or other waste heat recovery measures, avoids manual operation on site, saves manpower and has high intelligent degree.

[0017] The features and advantages of the utility model will be described in detail with reference to the embodiments and the accompanying drawings. DRAWINGS

[0018] Figure 1 is a sectional structure schematic view of the slag pool retaining wall for steel slag treatment of the utility model;

[0019] Figure 2 is a side view of the slag pool retaining wall for steel slag treatment of the utility model;

[0020] Figure 3 is a structural schematic view of the waste heat recovery device.

[0021] In the figure: 1-pool wall, 2-protective steel billet, 3-steel shape, 4-cold water inlet pipeline, 5-heat exchange water discharge pipe, 6-hot water outlet pipeline, 7-electric valve, 8-temperature transmitter, 9-automatic control system, 10-steel plate embedded part, 11-steel slag, 12-cold water inlet pipe, 13-hot water outlet pipe, 14-slag pool. DETAILED DESCRIPTION

[0022] Referring to Figure 1 , Figure 2 , the utility model discloses a slag pool retaining wall for steel slag treatment, including pool wall 1, a plurality of protective steel billet 2, a plurality of steel shape 3, heat exchange water discharge pipe 5 and a plurality of steel plate embedded part 10, the steel plate embedded part 10 is poured in the pool wall 1 side to steel slag 11, the protective steel billet 2 with corresponding a plurality of steel plate embedded part 10 between all through steel shape 3 welding connection, the pool wall 1 and protective steel billet 2 between being equipped with heat exchange water discharge pipe 5.

[0023] The protective steel billet 2, steel shape 3 and steel plate embedded part 10 are all set longitudinally.

[0024] The bottom elevation of the protective steel billet 2, steel shape 3 and steel plate embedded part 10 is flush with the bottom of the pool wall 1.

[0025] The top elevation of the protective steel billet 2 is flush with the top of the pool wall 1, and the top elevation of the steel shape 3 and the steel plate embedded part 10 is lower than the top of the pool wall 1 and differs by greater than or equal to 150 mm.

[0026] The spacing between the adjacent two steel shapes 3 is equivalent to the width b of the protective steel billet 2.

[0027] The top of the adjacent two protective steel billets 2 is closed by welding a cast steel plate to protect the heat exchange water discharge pipe 5 arranged between the pool wall 1 and the protective steel billet 2.

[0028] The pool wall 1 is made of anti-permeable heat-resistant concrete and is a vertical reinforced concrete wall.

[0029] The heat exchange water discharge pipe 5 adopts a U-shaped coil pipe.

[0030] Referring to Figure 3A waste heat recovery device, comprising a plurality of slag pools 14, a cold water inlet pipe 4, a hot water outlet pipe 6, a plurality of electric valves 7 and a plurality of temperature transmitters 8, the slag pool 14 comprises the slag pool retaining wall described above, the input end of the heat exchange water pipe 5 is communicated with the cold water inlet pipe 4 through the cold water inlet pipe 12, the output end of the heat exchange water pipe 5 is communicated with the hot water outlet pipe 6 through the hot water outlet pipe 13, the cold water inlet pipe 12 is sequentially provided with the temperature transmitter 8 and the electric valve 7 along the water flow direction, the hot water outlet pipe 13 is sequentially provided with the electric valve 7 and the temperature transmitter 8 along the water flow direction, and the electric valve 7 and the temperature transmitter 8 are electrically connected with the automatic control system 9.

[0031] When the feedback temperature value T2 of the temperature transmitter 8 on the hot water outlet pipe 13 corresponding to a certain slag pool 14 is greater than or equal to T1, the automatic control system 9 automatically feeds back a signal to the electric valve 7 on the cold water inlet pipe 12 corresponding to the slag pool 14, so that the opening degree of the electric valve 7 is increased to ensure that T2 is in the range of 1.05T1≥T2≥T1; when the feedback temperature value T2 of the temperature transmitter 8 on the hot water outlet pipe 13 corresponding to a certain slag pool 14 is less than T1, the automatic control system 9 automatically feeds back a signal to the electric valve 7 on the cold water inlet pipe 12 corresponding to the slag pool 14, so that the opening degree of the electric valve 7 is reduced to ensure that T2≥T1, wherein T1 is a quality requirement value.

[0032] The automatic control system 9 adopts a PLC controller.

[0033] The working process of the waste heat recovery device is as follows:

[0034] In the working process of the waste heat recovery device, according to the characteristics that the heat release amounts of the steel slag 11 are different in different stages such as slag piling, water splashing, slag smothering and slag discharging based on the hot stewing and hot splashing technologies, the opening degree of the electric valve 7 arranged on the cold water inlet pipe 12 needs to be automatically adjusted to ensure that the feedback temperature value T2 of the temperature transmitter 8 arranged on the hot water outlet pipe 13 is greater than or equal to a quality requirement value T1; especially in the slag discharging stage, the electric valve 7 on the cold water inlet pipe 12 corresponding to the slag pool needs to be closed when necessary, so as to avoid manual operation on site and save time and effort.

[0035] The steel slag 11 exchanges heat with the cold water in the heat exchange water pipe 5 through the protective steel billet 2, and the hot water in the hot water outlet pipe 6 can be transported to a production or living hot water pipe network for use or can be transported to other waste heat recovery systems.

[0036] The above examples are illustrative of the present application and are not limiting. Any simple modifications of the present application are considered to be within the scope of the present application.

Claims

1. A slag pool retaining wall for steel slag treatment, characterized by: It comprises a pool wall (1), several protective steel billets (2), several profile steels (3), heat exchange water pipes (5) and several steel plate embedded parts (10), the steel plate embedded parts (10) are cast on the side of the pool wall (1) facing the steel slag (11), the protective steel billets (2) and the corresponding several steel plate embedded parts (10) are connected by the profile steels (3), the pool wall (1) and the protective steel billets (2) are provided with the heat exchange water pipes (5).

2. The slag pool retaining wall for steel slag treatment according to claim 1, characterized by: The protective steel billets (2), the profile steels (3) and the steel plate embedded parts (10) are longitudinally arranged.

3. The slag pool retaining wall for steel slag treatment according to claim 1, characterized by: The bottom elevation of the protective steel billets (2), the profile steels (3) and the steel plate embedded parts (10) is flush with the bottom of the pool wall (1).

4. The slag pool retaining wall for steel slag treatment according to claim 1, characterized by: The top elevation of the protective steel billets (2) is flush with the top of the pool wall (1), while the top elevation of the profile steels (3) and the steel plate embedded parts (10) is lower than the top of the pool wall (1) and the difference is greater than or equal to 150 mm.

5. The slag pool retaining wall for steel slag treatment according to claim 1, characterized by: The interval between the adjacent two profile steels (3) is equivalent to the width b of the protective steel billets (2).

6. The slag pool retaining wall for steel slag treatment according to claim 1, characterized by: The top of the adjacent two protective steel billets (2) is closed by the cast steel plate welding.

7. The slag pool retaining wall for steel slag treatment according to claim 1, characterized by: The pool wall (1) is made of anti-permeation heat-resistant concrete and is a vertical reinforced concrete wall.

8. A waste heat recovery device, characterized in that it comprises several slag pools (14), a cold water inlet pipeline (4), a hot water outlet pipeline (6), several electric valves (7) and several temperature transmitters (8), the slag pool (14) comprises the slag pool retaining wall according to any one of claims 1-6, the input end of the heat exchange water pipe (5) is communicated with the cold water inlet pipeline (4) through the cold water inlet pipe (12), the output end of the heat exchange water pipe (5) is communicated with the hot water outlet pipeline (6) through the hot water outlet pipe (13), the cold water inlet pipe (12) is provided with the temperature transmitter (8) and the electric valve (7) in sequence along the water flow direction, the hot water outlet pipe (13) is provided with the electric valve (7) and the temperature transmitter (8) in sequence along the water flow direction, and the electric valve (7) and the temperature transmitter (8) are electrically connected with the automatic control system (9).

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