Steel slag waste heat utilization equipment

Abstract

The utility model provides steel slag waste heat utilization equipment, the steel slag waste heat utilization equipment comprises a mode water-cooled wall, a downcomer, a return pipe, a steam pocket, a water supply assembly and a preheater, the mode water-cooled wall is used for being arranged above a roller press to absorb waste heat of steel slag in the roller press, the steam pocket is connected with the mode water-cooled wall through the downcomer and the return pipe, and the water supply assembly is connected with the mode water-cooled wall through the water supply assembly. The water supply assembly is used for supplying water to the mode water-cooled wall through the downcomer and obtaining water and steam absorbing waste heat in the mode water-cooled wall through the return pipe, the steam pocket is provided with a steam outlet used for releasing steam, and the preheater is connected between the water supply assembly and the steam pocket so as to preheat the water supplied to the steam pocket by the water supply assembly. According to the steel slag waste heat utilization equipment, waste heat of steel slag is absorbed through the mode water cooling wall, water is supplied to the mode water cooling wall through the steam pocket, water and steam which absorb heat are recycled, the steam is discharged through the steam outlet to be utilized, and the steel slag waste heat utilization equipment is simple in structure, small in occupied space, high in safety and high in waste heat recovery rate.

Description

Technical Field

[0001] The utility model relates to the field of waste heat utilization, in particular to a steel slag waste heat utilization device. Background Art

[0002] Steel slag is a byproduct of the steelmaking process, which has a high amount of waste heat. In the related art, after being crushed by a roller press, the steel slag is conveyed to a heat extraction kettle by a conveyor belt, and the waste heat of the steel slag is absorbed by the air distribution device in the heat extraction kettle. However, the conveyor belt and the heat extraction kettle require a large installation space, which is not convenient for installation in the factory. At the same time, there are safety hazards when the crushed steel slag is transported by the conveyor belt. Utility Model Content

[0003] The utility model aims to solve one of the technical problems in the related art at least to a certain extent. To this end, the embodiment of the utility model provides a steel slag waste heat utilization device, which has a simple structure, occupies a small space, and has high safety.

[0004] The steel slag waste heat utilization equipment of the utility model embodiment comprises:

[0005] A pattern water-cooled wall, wherein the pattern water-cooled wall is arranged above the roller press to absorb the residual heat of the steel slag in the roller press;

[0006] A downcomer connected to the model water-cooled wall;

[0007] A return pipe connected to the model water-cooled wall;

[0008] a steam drum, the steam drum being connected to the downcomer and the return pipe so as to provide water to the model water-cooled wall through the downcomer, and to obtain the water after absorbing waste heat in the model water-cooled wall and the steam generated by the water through the return pipe, the steam drum having a steam outlet for releasing steam;

[0009] a water supply assembly, the water supply assembly being connected to the steam drum to supply water to the steam drum;

[0010] A preheater is connected between the water supply assembly and the steam drum to preheat the water supplied to the steam drum by the water supply assembly.

[0011] The steel slag waste heat utilization device of the utility model embodiment absorbs the waste heat of the steel slag through the model water-cooled wall located above the roller press, supplies water to the model water-cooled wall through the steam drum, recovers the water body and the generated steam after absorbing the heat, and discharges the steam through the steam outlet for utilization, and at the same time, a water supply component is provided to supply water to the steam drum, and a preheater is used to ensure that the water body supplied to the steam drum has a certain temperature, so as to ensure that the water body in the steam drum generates steam after absorbing heat in the model water-cooled wall, thereby realizing the absorption and utilization of the waste heat of the steel slag. The steel slag waste heat utilization device has a simple structure, occupies a small space, has high safety, and has a high waste heat recovery rate.

[0012] In some embodiments, the pattern water-cooled wall and the roller press are both arranged in a roller press room, a portion of the pattern water-cooled wall is arranged on the top wall of the roller press room and is connected to the downcomer and the return pipe, and another portion of the pattern water-cooled wall is arranged on the circumferential side wall of the roller press room, and in the horizontal projection plane, the projection of the other portion of the pattern water-cooled wall surrounds the periphery of the projection of the roller press.

[0013] In some embodiments, an outer wall of the patterned water wall has a ceramic fiber coating.

[0014] In some embodiments, the water supply assembly includes an evaporative condensation device, a water supply tank and a water supply pump. The evaporative condensation device is connected to the water supply tank to store the desalted water produced by the evaporative condensation device in the water supply tank. The water supply pump is connected between the water supply tank and the preheater to pump the desalted water in the water supply tank to the preheater.

[0015] In some embodiments, the drum has a liquid level gauge, which is electrically connected to the water supply assembly.

[0016] In some embodiments, the steel slag waste heat utilization equipment also includes a sewage tank and a periodic sewage expansion tank, the periodic sewage expansion tank has an inlet, a sewage outlet and a steam outlet, the steam drum has a periodic sewage outlet, the periodic sewage outlet is opened at fixed intervals, the periodic sewage outlet is connected to the inlet, the sewage outlet is connected to the sewage tank, and the steam outlet and the steam outlet are both used to connect to the plant network.

[0017] In some embodiments, the steam drum has a doser for releasing antiscalant.

[0018] In some embodiments, the steam drum has a safety valve, an exhaust valve and a pressure gauge.

[0019] In some embodiments, the steel slag waste heat utilization equipment also includes a sampling cooler, which is connected to the steam drum.

[0020] In some embodiments, there are at least two model water-cooled walls, at least two of which are connected to the steam drum via corresponding downcomers and corresponding return pipes, and the steam drum and the water supply tank are located between two of the model water-cooled walls. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a steel slag waste heat utilization device according to an embodiment of the utility model;

[0022] Figure 2 yes Figure 1 Enlarged schematic diagram of the middle steam drum.

[0023] Reference numerals:

[0024] 1. Model water-cooled wall; 2. Roller press; 3. Downcomer; 4. Return pipe; 5. Steam drum; 51. Steam outlet; 52. Liquid level gauge; 53. Regular sewage outlet; 54. Dosing device; 55. Safety valve; 56. Exhaust valve; 57. Pressure gauge; 58. Water inlet; 59. Emergency drain outlet; 6. Water supply assembly; 61. Water supply tank; 7. Roller press room; 8. Slag tank truck. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0026] Reference below Figure 1 and Figure 2 The steel slag waste heat utilization device according to the embodiment of the utility model is described.

[0027] like Figure 1 and Figure 2 As shown, the steel slag waste heat utilization equipment of the utility model embodiment includes a model water-cooled wall 1, a downcomer 3, a return pipe 4, a steam drum 5, a water supply component 6 and a preheater (not shown in the figure).

[0028] The model water-cooled wall 1 is used to be arranged above the roller press 2 to absorb the waste heat of the steel slag in the roller press 2. The downcomer 3 is connected to the model water-cooled wall 1. The return pipe 4 is connected to the model water-cooled wall 1. The steam drum 5 is connected to the downcomer 3 and the return pipe 4 to provide water to the model water-cooled wall 1 through the downcomer 3, and to obtain the water after absorbing the waste heat in the model water-cooled wall 1 and the steam generated by the water through the return pipe 4. The steam drum 5 has a steam outlet 51 for releasing steam. The water supply component 6 is connected to the steam drum 5 to supply water to the steam drum 5. The preheater is connected between the water supply component 6 and the steam drum 5 to preheat the water supplied to the steam drum 5 by the water supply component 6.

[0029] like Figure 1 and Figure 2 As shown, the top of the roller press 2 is open for the steel slag to be fed into the roller press 2 and for the waste heat of the steel slag in the roller press 2 to be dissipated upward. The bottom of the roller press 2 has a discharge port, and the steel slag tank truck 8 is arranged one by one in correspondence with the roller press 2. The steel slag tank truck 8 can move toward and away from the corresponding roller press 2 in the horizontal direction, and has a receiving position located below the discharge port, so that the steel slag tank truck 8 can obtain the steel slag crushed by the corresponding roller press 2 at the receiving position and transport the crushed steel slag.

[0030] The model water-cooled wall 1 is arranged above the roller press 2. The heat radiated upward by the steel slag is exchanged with the model water-cooled wall 1 in the form of heat radiation, so that the water in the model water-cooled wall 1 absorbs the residual heat of the steel slag and generates steam, while the steel slag is cooled. Preferably, the steel slag fed into the roller press 2 is 1400℃-1600℃, more preferably 1500℃, and the steel slag is cooled to 550℃-650℃, more preferably 600℃.

[0031] The model water-cooled wall 1 is connected to the steam drum 5 through the downcomer 3 and the return pipe 4. The water in the steam drum 5 is supplied to the model water-cooled wall 1 through the downcomer 3 and absorbs the waste heat of the steel slag. The water after absorbing the waste heat and the generated steam flow back to the steam drum 5 through the return pipe 4, and the water-steam separation is realized in the steam drum 5. The separated steam is discharged through the steam outlet 51 of the steam drum 5 and utilized, thereby realizing the utilization of the waste heat of the steel slag. Preferably, the steam outlet 51 is connected to the plant area pipeline network, and the steam is transported to the steam equipment through the plant area pipeline network. Preferably, the steam pressure is 0.7MPa-0.9MPa, more preferably 0.8MPa, and the steam temperature is 150℃-200℃, more preferably 175℃.

[0032] The water supply assembly 6 is connected to the steam drum 5 to supply water to the steam drum 5, thereby compensating for the water lost in the steam drum 5 in the form of steam. The preheater is connected between the water supply assembly 6 and the steam drum 5 to preheat the water supplied to the steam drum 5 by the water supply assembly 6, ensuring that the water in the steam drum 5 has a certain temperature and can generate steam under the heating of the waste heat of the slag after entering the model water-cooled wall 1. Preferably, the preheater is connected to the pipe network in the slag roller pressing area and the hot stuffy area of ​​the plant area to preheat the water supplied to the steam drum 5 by using the heat of the slag roller pressing area and the hot stuffy area. The water supplied to the steam drum 5 is preferably preheated to 90°C-100°C, more preferably 100°C.

[0033] The steel slag waste heat utilization device of the utility model embodiment absorbs the waste heat of the steel slag through the model water-cooled wall located above the roller press, supplies water to the model water-cooled wall through the steam drum, recovers the water body and the generated steam after absorbing the heat, and discharges the steam through the steam outlet for utilization, and at the same time, a water supply component is provided to supply water to the steam drum, and a preheater is used to ensure that the water body supplied to the steam drum has a certain temperature, so as to ensure that the water body in the steam drum generates steam after absorbing heat in the model water-cooled wall, thereby realizing the absorption and utilization of the waste heat of the steel slag. The steel slag waste heat utilization device has a simple structure, occupies a small space, has high safety, and has a high waste heat recovery rate.

[0034] In some embodiments, the pattern water-cooled wall 1 and the roller press 2 are both arranged in a roller press room 7, a part of the pattern water-cooled wall 1 is arranged on the top wall of the roller press room 7 and connected to the downcomer 3 and the return pipe 4, and the other part of the pattern water-cooled wall 1 is arranged on the circumferential side wall of the roller press room 7. In the horizontal projection plane, the projection of the other part of the pattern water-cooled wall 1 surrounds the outer periphery of the projection of the roller press 2.

[0035] like Figure 1 and Figure 2 As shown, the plant area includes a roller press room 7, and the model water-cooled wall 1 and the roller press 2 are both arranged in the corresponding roller press room 7, wherein the roller press 2 is arranged in the middle of the roller press room 7, the model water-cooled wall 1 is arranged in the upper part of the roller press room 7, and the lower part of the roller press room 7 has a passage for the slag tank truck 8 to enter and exit the roller press room 7.

[0036] The model water-cooled wall 1 has a horizontal part and a vertical part. The horizontal part is arranged on the top wall of the roller press room 7 and is located above the top of the roller press 2. The vertical part is a ring around the vertical direction. The vertical part is arranged around the horizontal part and extends downward from the horizontal part. The vertical part is arranged on the circumferential side wall of the roller press room 7. Both the horizontal part and the vertical part are located above the roller press 2. In the horizontal projection plane, the projection of the vertical part surrounds the outer periphery of the projection of the roller press 2. Thus, the model water-cooled wall 1 can fully absorb and obtain the waste heat of the steel slag.

[0037] The downcomer 3 and the return pipe 4 are both connected to the horizontal part.

[0038] In some embodiments, the outer wall of the pattern water-cooled wall 1 has a ceramic fiber coating, so that the pattern water-cooled wall 1 has good air tightness and a lower outer wall temperature.

[0039] In some embodiments, the water supply assembly 6 includes an evaporative condensation device (not shown in the figure), a water supply tank 61 and a water supply pump (not shown in the figure). The evaporative condensation device is connected to the water supply tank 61 to store the desalted water produced by the evaporative condensation device in the water supply tank 61. The water supply pump is connected between the water supply tank 61 and the preheater to pump the desalted water in the water supply tank 61 to the preheater.

[0040] like Figure 1and Figure 2 As shown, the steam drum 5 has a water inlet 58, which is connected to the preheater, the water supply pump, the water supply tank 61 and the evaporation condensation device in sequence through pipelines. The evaporation condensation device condenses desalted water and supplies the desalted water to the water supply tank 61 for storage. The desalted water in the water supply tank 61 is pumped to the preheater by the water supply pump for preheating, and then enters the steam drum 5 as water.

[0041] It is understandable that, in other embodiments, the water supply pump may also be disposed between the preheater and the water inlet 58 , or disposed on the water supply tank 61 .

[0042] In some embodiments, the steam drum 5 has a liquid level gauge 52 , and the liquid level gauge 52 is electrically connected to the water supply assembly 6 .

[0043] like Figure 2 As shown, the steam drum 5 has two groups of liquid level gauges 52, which are arranged at intervals along the left-right direction, and each group of liquid level gauges 52 has two liquid level gauges 52 arranged at intervals along the up-down direction. The liquid level gauges 52 are used to obtain the liquid level of the water body in the steam drum 5, and the liquid level gauges 52 are electrically connected to the water supply pump. When the actual liquid level obtained by the liquid level gauge 52 is lower than or equal to the preset minimum liquid level, the liquid level gauge 52 triggers the water supply pump to pump the water in the water supply tank 61 into the steam drum 5, thereby replenishing the water in the steam drum 5.

[0044] In some embodiments, the slag waste heat utilization equipment of the utility model embodiment also includes a sewage tank (not shown in the figure) and a periodic sewage expansion tank (not shown in the figure), the periodic sewage expansion tank has an inlet, a sewage outlet and a steam outlet, the steam drum 5 has a periodic sewage outlet 53, the periodic sewage outlet 53 is opened at fixed intervals, the periodic sewage outlet 53 is connected to the inlet, the sewage outlet is connected to the sewage tank, and the steam outlet and the steam outlet 51 are both used to connect to the factory network.

[0045] like Figure 2 As shown, the drum 5 has a regular sewage outlet 53, which is opened at fixed intervals, for example, once every 3-5 hours, to discharge sewage in the drum 5 to ensure the water quality in the drum 5.

[0046] The periodic sewage expansion tank has an inlet, a sewage outlet and a steam outlet. The inlet is connected to the periodic sewage outlet 53 through a pipeline to obtain sewage discharged from the steam drum 5, and the sewage is depressurized and expanded to generate secondary steam, which is discharged from the steam outlet, which is connected to the plant area pipe network, and the secondary steam is transported to the steam equipment through the plant area pipe network for use, and the remaining sewage after depressurization and expansion is discharged from the sewage outlet, which is connected to the sewage tank to discharge the remaining sewage into the sewage tank.

[0047] The waste heat of steel slag can be further utilized by regularly discharging the expansion tank, so that the waste heat utilization equipment of steel slag has a higher waste heat recovery rate.

[0048] In some embodiments, the steam drum 5 has a doser 54 for releasing antiscalant.

[0049] like Figure 2 As shown, the steam drum 5 has a doser 54, which is used to release antiscalant into the steam drum 5 to prevent scaling in the steam drum 5, which would cause the steam drum 5, the model water-cooled wall 1, the downcomer 3, and the return pipe 4 to be blocked and damaged.

[0050] In some embodiments, the steam drum 5 has a safety valve 55 , an exhaust valve 56 and a pressure gauge 57 .

[0051] like Figure 2 As shown, the top of the steam drum 5 is provided with a safety valve 55, an exhaust valve 56 and a pressure gauge 57. The pressure gauge 57 is used to obtain and display the internal pressure of the steam drum 5. When the internal pressure of the steam drum 5 reaches the preset value of the safety valve 55, the safety valve 55 opens and releases the pressure to prevent the steam drum 5 from being damaged due to excessive pressure.

[0052] The exhaust valve 56 is used to exhaust the steam drum 5 when it is in an emergency state, thereby reducing the internal pressure of the steam drum 5 and ensuring the safe operation of the steam drum 5.

[0053] Preferably, the steam drum 5 also has an emergency drain outlet 59, which is located at the bottom of the steam drum 5 and is preferably connected to a sewage tank. The emergency drain outlet 59 is used to drain water when the steam drum 5 is in an emergency state, thereby reducing the internal pressure of the steam drum 5 and ensuring the safe operation of the steam drum 5.

[0054] In some embodiments, the steel slag waste heat utilization equipment of the utility model embodiment further includes a sampling cooler (not shown in the figure), and the sampling cooler is connected to the steam drum 5.

[0055] Specifically, the sampling cooler is connected to the steam drum 5 to obtain the gas and water in the steam drum 5 and cool it, so as to sample the medium inside the steam drum 5 for easy measurement and analysis.

[0056] In some embodiments, there are at least two model water-cooled walls 1 , and at least two model water-cooled walls 1 are connected to the steam drum 5 through corresponding downcomers 3 and corresponding return pipes 4 , and the steam drum 5 and the water supply tank 61 are located between two of the model water-cooled walls 1 .

[0057] like Figure 1 and Figure 2 As shown, the plant preferably includes two roller press rooms 7, and the two roller press rooms 7 are arranged at intervals along the left-right direction. Each roller press room 7 is provided with a corresponding model water-cooled wall 1 and a roller press 2.

[0058] An installation platform is provided between the two roller press rooms 7. The installation platform is higher than the ground and has two layers. In other words, the second-layer platform, the first-layer platform and the ground are arranged in sequence in the vertical direction. A sewage pool is provided on the ground. The first-layer platform is provided with a regular sewage expansion container, a water supply tank 61, a water supply pump and a sampling cooler. The second-layer platform is provided with a steam drum 5. Preferably, the steam drum 5 is connected to the second-layer platform through a fixed support and a sliding support.

[0059] The top of the steam drum 5 is connected to two return pipes 4, which are connected to the two mode water-cooled walls 1 in a one-to-one correspondence. The bottom of the steam drum 5 is connected to the downcomer 3, which has two outlet ends, which are connected to the two mode water-cooled walls 1 in a one-to-one correspondence, so as to supply water to the two mode water-cooled walls 1 through the steam drum 5 and obtain the water and steam refluxed from the two mode water-cooled walls 1. Preferably, the first-layer platform is also provided with a circulating pump, which is connected to the downcomer 3, so as to pump the water in the steam drum 5 into the two mode water-cooled walls 1 at the same time.

[0060] Preferably, the steam drum 5 is a forced circulation hot water boiler.

[0061] Preferably, the process flow of the steel slag waste heat utilization equipment in the embodiment of the utility model during operation is:

[0062] The evaporation and condensation device generates desalted water and stores it in a water supply tank 61. The desalted water in the water supply tank 61 is pumped to a preheater for preheating by a water supply pump. The preheated desalted water is supplied to the steam drum 5 as water. The steam drum 5 supplies water to two mode water-cooled walls 1 through a downcomer 3. The water in the two mode water-cooled walls 1 absorbs the waste heat of the slag to generate steam. The steam-water mixture in the two mode water-cooled walls 1 flows back to the steam drum 5 through the corresponding return pipe 4, and the steam and water are separated in the steam drum 5. The separated water is continuously supplied to the mode water-cooled wall 1 for recycling, and the separated steam is discharged from the steam outlet 51 to the plant network for utilization.

[0063] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside” and “outside”, etc., are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0064] In addition, the terms "first" and "second" are only used for distinction, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0065] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0066] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0067] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0068] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are illustrative and cannot be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A steel slag waste heat utilization device, characterized in that: include: A model water-cooled wall (1), the model water-cooled wall (1) being arranged above a roller press (2) to absorb residual heat of steel slag in the roller press (2); A downcomer (3), wherein the downcomer (3) is connected to the model water-cooled wall (1); A return pipe (4), the return pipe (4) being connected to the model water-cooled wall (1); a steam drum (5), the steam drum (5) being connected to the downcomer (3) and the return pipe (4) so ​​as to provide water to the model water-cooled wall (1) through the downcomer (3), and to obtain the water after absorbing waste heat in the model water-cooled wall (1) and the steam generated by the water through the return pipe (4), the steam drum (5) having a steam outlet (51) for releasing steam; a water supply assembly (6), the water supply assembly (6) being connected to the steam drum (5) so as to supply water to the steam drum (5); A preheater is connected between the water supply component (6) and the steam drum (5) to preheat the water supplied from the water supply component (6) to the steam drum (5).

2. The steel slag waste heat utilization equipment according to claim 1, characterized in that: The model water-cooled wall (1) and the roller press (2) are both arranged in a roller press room (7); a portion of the model water-cooled wall (1) is arranged on the top wall of the roller press room (7) and is connected to the downcomer (3) and the return pipe (4); another portion of the model water-cooled wall (1) is arranged on the circumferential side wall of the roller press room (7); and in a horizontal projection plane, the projection of the other portion of the model water-cooled wall (1) surrounds the outer periphery of the projection of the roller press (2).

3. The steel slag waste heat utilization equipment according to claim 1, characterized in that: The outer wall of the model water-cooled wall (1) has a ceramic fiber coating.

4. The steel slag waste heat utilization equipment according to claim 1, characterized in that: The water supply assembly (6) comprises an evaporative condensation device, a water supply tank (61) and a water supply pump; the evaporative condensation device is connected to the water supply tank (61) so as to store desalted water generated by the evaporative condensation device in the water supply tank (61); the water supply pump is connected between the water supply tank (61) and the preheater so as to pump the desalted water in the water supply tank (61) to the preheater.

5. The steel slag waste heat utilization equipment according to claim 1, characterized in that: The steam drum (5) has a liquid level meter (52), and the liquid level meter (52) is electrically connected to the water supply component (6).

6. The steel slag waste heat utilization equipment according to claim 1, characterized in that: It also includes a sewage tank and a periodic sewage expansion tank, the periodic sewage expansion tank having an inlet, a sewage outlet and a steam outlet, the steam drum (5) having a periodic sewage outlet (53), the periodic sewage outlet (53) being opened at fixed intervals, the periodic sewage outlet (53) being connected to the inlet, the sewage outlet being connected to the sewage tank, and the steam outlet and the steam outlet (51) being used to connect to the plant pipe network.

7. The steel slag waste heat utilization equipment according to claim 1, characterized in that: The steam drum (5) has a doser (54) for releasing antiscalant.

8. The steel slag waste heat utilization equipment according to claim 1, characterized in that: The steam drum (5) has a safety valve (55), an exhaust valve (56) and a pressure gauge (57).

9. The steel slag waste heat utilization equipment according to claim 1, characterized in that: It also includes a sampling cooler, which is connected to the steam drum (5).

10. The steel slag waste heat utilization equipment according to claim 4, characterized in that: There are at least two of the model water-cooled walls (1), and at least two of the model water-cooled walls (1) are connected to the steam drum (5) through the corresponding downcomers (3) and the corresponding return pipes (4), and the steam drum (5) and the water supply tank (61) are located between two of the model water-cooled walls (1).

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