Slag water waste heat recovery system

Abstract

The utility model discloses a slag water waste heat recovery system, belongs to the technical field of waste heat recovery devices, and aims to solve the problems that heat in slag water is difficult to recycle and the like. The utility model discloses a slag water waste heat recovery system which comprises a slag water pool heat exchange area, and the slag water pool heat exchange area comprises at least one slag water flow channel used for containing waste heat slag water to be recovered; and the heat removal modules at least partially extend into the waste heat slag water to be recycled, the heat removal modules can absorb heat in the waste heat slag water to be recycled and exchange the heat to the water to be heated, and each heat removal module is independently controlled. According to the slag water waste heat recovery system disclosed by the utility model, the heat removal module is used as a medium between waste heat slag water to be recovered and water to be heated, and the waste heat slag water to be recovered and the water to be heated do not only perform direct dividing wall type heat exchange, so that the problems of scaling, blockage, corrosion and the like on an upper jacket type heat pipe bundle caused by high-slag-content water in waste heat recovery are solved; and waste heat recovery of low-temperature and corrosive slag-containing water is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat recovery devices, in particular to a slag water waste heat recovery system. Background Art

[0002] In the metallurgical industry, including both ferrous and nonferrous metallurgy, and particularly in blast furnace ironmaking, the mainstream process for rapidly cooling and granulating high-temperature molten slag remains water quenching, which uses high-pressure water to crush and rapidly cool the slag. While water quenching consumes a lot of water, the water used can be recycled after treatment.

[0003] The current common treatment method is to filter the slag water at 60-95℃ after slag washing, then send it to an air cooling tower for cooling and then recycling. The heat in the high-temperature slag water is directly dissipated, wasting energy and polluting the environment.

[0004] Some existing heat exchangers can channel slag water into a pool, where a cooling water pipe is installed. The cold water exchanges heat with the slag water as it flows through the pipe. However, this low-temperature waste heat recovery method has drawbacks: The slag water is high in impurities and corrosive, which can easily cause corrosion, wear, and blockage of heat exchange components like the cooling water pipe. This results in a high failure rate for the heat exchanger and a poor user experience. Utility Model Content

[0005] The purpose of the utility model is to propose a slag water waste heat recovery system, which solves the problem that the heat in the slag water is difficult to recycle and utilize, and provides a good user experience.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] The slag water waste heat recovery system includes a slag water pool heat exchange area, which includes: at least one slag water flow channel for accommodating the waste heat slag water to be recovered, and the waste heat slag water to be recovered can flow from one end of the slag water flow channel to the other opposite end; and at least one group of heat extraction modules, located between the two ends of the slag water flow channel, the heat extraction modules at least partially extending into the waste heat slag water to be recovered in the slag water flow channel, the heat extraction modules can absorb heat from the waste heat slag water to be recovered and exchange heat with the hot water to be heated, and each group of the heat extraction modules is independently controlled.

[0008] In one of the preferred embodiments, the heat extraction module includes: at least one upper jacketed heat pipe bundle, each upper jacketed heat pipe bundle includes at least two heat pipes, each heat pipe includes a lower heat absorption section and an upper heat release section, the heat absorption section extends into the waste heat slag water to be recovered, and the heat release section extends into the jacket pipe; the heat pipe is filled with a heat transfer medium, and the heat transfer medium can transfer the heat of the heat absorption section to the heat release section; a positioning member for fixing the heat pipe and positioning the heat extraction module; and at least two jacketed pipes, each jacketed pipe is arranged on the outer periphery of the heat release section of one of the heat pipes, and a jacket water flow channel for the water to be heated to flow through is formed in the jacket pipe, and the water to be heated can exchange heat with the heat transfer medium in the heat release section.

[0009] In one preferred embodiment, in a single heat extraction module, at least two of the jacketed tubes are sequentially connected to form a jacket water flow channel in an upper jacketed heat tube bundle, and two adjacent jacketed tubes in the upper jacketed heat tube bundle are connected by a transition tube, and the jacket water flow channels in two adjacent upper jacketed heat tube bundles are respectively connected to the water inlet header and the water outlet header through transition tubes at both ends; when there is only one upper jacketed heat tube bundle in a single heat extraction module, the heat extraction modules are sequentially connected in series through hoses to the transition tubes for the water inlet and outlet of the upper jacketed heat tube bundle in the module.

[0010] In one of the preferred embodiments, in the heat extraction module, the heating water flow channels of each jacketed tube in the single-piece upper jacketed heat tube bundle flow in series through a transition pipe; the jacketed water flow channels between each piece are connected to the water inlet header and the water outlet header respectively through the transition pipes at both ends in parallel; between each heat extraction module, the water outlet header of the upper-level heat extraction module is connected to the water inlet header of the lower-level heat extraction module through a hose, and the water to be heated between the heat extraction modules is connected in series as a whole.

[0011] In one of the preferred embodiments, the slag water waste heat recovery system includes one or more groups of the heat extraction modules along the direction perpendicular to the slag water flow, each group of the heat extraction modules contains at least one or more upper jacketed heat pipe bundles, and the heat pipes in two adjacent upper jacketed heat pipe bundles are staggered or arranged in sequence.

[0012] In one preferred embodiment, the jacket water flow channel is a straight flow channel, a continuous spiral channel or a discontinuous spiral channel.

[0013] In one of the preferred embodiments, along the flow direction of the slag water with waste heat to be recovered, the slag water waste heat recovery system includes one or at least two slag water flow channels arranged in parallel, and a connected slag water inlet pipe and a slag water inlet end are provided at the water inlet end of each of the slag water flow channels. The horizontal water outlet pipe mouth of the slag water inlet end is a downward bevel cut at 45°±30°, and the upper end of the horizontal pipe mouth edge is a long plain line, and the lower end is a short plain line; a heat exchange zone overflow weir is provided at the water outlet end of each of the slag water flow channels, and a slag water collection pool is formed between the heat exchange zone overflow weir and the end face of the slag water flow channel.

[0014] In one of the preferred embodiments, the slag water waste heat recovery system includes a slag water pool auxiliary area, the slag water pool auxiliary area includes a first-level and above sedimentation pool, a maintenance pool and an auxiliary area slag water collection pool, the auxiliary area slag water collection pool is connected with the slag water collection pool at the outlet end of the slag water flow channel; an auxiliary area water inlet pipe is installed in the sedimentation pool at one end, and an auxiliary area water outlet pipe is installed in the sedimentation pool at the other end, the waste heat slag water to be recovered enters the slag water pool auxiliary area through the auxiliary area water inlet pipe and leaves the slag water pool auxiliary area through the auxiliary area water outlet pipe, a drop-type overflow weir is provided between two adjacent sedimentation pools, and the height of each drop-type overflow weir gradually decreases along the flow direction of the waste heat slag water to be recovered, and the auxiliary area water outlet pipe is connected to the slag water flow channel.

[0015] In one of the preferred embodiments, along the flow direction of the waste heat slag water to be recovered, the auxiliary area of ​​the slag water pool includes one or at least two sediment flow channels arranged in parallel, each of the sediment flow channels includes one or more sediment pools, and all the sediment flow channels are independent of each other.

[0016] In one of the preferred embodiments, the slag water waste heat recovery system also includes a ground preparation area, which includes a slag flushing water primary filter and a preparation area water pipeline. The preparation area water pipeline is connected to the auxiliary area water inlet pipe, and the waste heat slag water to be recovered discharged from the slag flushing water primary filter enters the sedimentation tank through the preparation area water pipeline and the auxiliary area water inlet pipe.

[0017] In one of the preferred embodiments, the slag water waste heat recovery system also includes a hot water output area, which includes a hot water storage tank, at least one user-point hot water tank, a hot water delivery pipe connected between the hot water storage tank and the user-point hot water tank, and a circulating return pipe. The hot water storage tank is connected to the water outlet manifold of the heat extraction module at the terminal of the heating water flow channel, the heat extraction module is connected to a cold water pipe for supplying water to be heated, and the circulating return pipe is connected between the hot water storage tank and the cold water pipe.

[0018] The slag water waste heat recovery system disclosed by the utility model comprises a slag water pool heat exchange zone, wherein the heat extraction module in the slag water pool heat exchange zone can absorb the heat in the waste heat slag water to be recovered and exchange the heat with the water to be heated, and the heat extraction module is used as a medium between the waste heat slag water to be recovered and the water to be heated, and the waste heat slag water to be recovered and the water to be heated are no longer just directly heat exchanged through a pipeline, thereby solving the problems of scaling, clogging, corrosion and the like caused by high slag water on the jacketed heat pipe bundle during waste heat recovery, and realizing effective waste heat recovery of low-temperature, corrosive slag water; the water to be heated reaches a certain temperature through indirect heat exchange with the waste heat slag water to be recovered, and can be used for civilian or production purposes, thereby solving the problem of heat waste in high-temperature slag water, and having high energy utilization rate; the heat extraction module preferably adopts a small-volume, light-weight device, which is convenient for maintenance, inspection, flushing and slag cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a plan view of a slag water waste heat recovery system provided by a specific embodiment of the utility model;

[0020] Figure 2 This is a combined plan view of the slag water pool heat exchange area and the slag water pool auxiliary area provided by a specific embodiment of the utility model;

[0021] Figure 3 This is a schematic elevation view of the heat exchange area of ​​the slag water pool provided by a specific embodiment of the present utility model;

[0022] Figure 4 yes Figure 3 A partial enlarged view of point A in the middle;

[0023] Figure 5 This is a front view of the heat extraction module provided in a specific embodiment of the utility model;

[0024] Figure 6 This is a left side view of the heat extraction module provided in a specific embodiment of the present utility model;

[0025] Figure 7 This is a top view of a heat extraction module provided in a specific embodiment of the present utility model;

[0026] Figure 8 This is a schematic diagram of the combined structure of the first heat pipe and jacketed pipe provided by the specific embodiment of the utility model;

[0027] Figure 9 This is a schematic diagram of the combined structure of the second heat pipe and jacketed pipe provided by the specific embodiment of the utility model;

[0028] Figure 10 This is a schematic diagram of the combined structure of the third heat pipe and jacketed pipe provided by the specific embodiment of the utility model;

[0029] Figure 11It is a schematic elevation view of the auxiliary area of ​​the slag water pool provided by a specific embodiment of the present utility model.

[0030] In the picture:

[0031] 1. Slag water pool heat exchange area; 2. Slag water pool auxiliary area; 3. Ground preparation area; 4. Hot water output area; 11. Slag water flow channel; 12. Heat extraction module; 13. Card slot; 21. Slag pool; 22. Maintenance pool; 23. Slag water collection pool in the auxiliary area; 24. Drop overflow weir; 31. Slag water primary filter; 32. Preparation area water pipeline; 41. Hot water storage tank; 42. User point hot water tank; 43. Hot water delivery pipe; 44. Circulation return pipe; 111. Slag water inlet pipe; 112. Slag water inlet terminal; 113. Overflow weir of heat exchange zone; 114. Slag water collection tank; 121. Heat pipe; 122. Positioning piece; 123. Jacketed pipe; 124. Upper jacketed heat pipe bundle; 126. Hose; 127. Cold water pipe; 128. Water inlet header; 129. Water outlet header; 211. Auxiliary zone water inlet pipe; 212. Auxiliary zone water outlet pipe; 1231. Direct current channel; 1232. Continuous spiral channel; 1233. Intermittent spiral channel. DETAILED DESCRIPTION

[0032] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar improvements without violating the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations 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 orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0035] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0036] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0037] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0038] This embodiment discloses a slag water waste heat recovery system, such as Figure 1 and Figure 2 As shown, the slag water waste heat recovery system can optionally include a slag water pool heat exchange area 1, a slag water pool auxiliary area 2, a ground preparation area 3 and a hot water output area 4. Each slag water waste heat recovery system must include a slag water pool heat exchange area 1, and the slag water pool auxiliary area 2, the ground preparation area 3 and the hot water output area 4 can be determined whether to be set according to actual usage requirements.

[0039] Among them, the slag water pool heat exchange area 1 includes at least one slag water flow channel 11 and at least one group of heat extraction modules 12. The slag water flow channel 11 is used to accommodate the slag water with waste heat to be recovered, and the slag water with waste heat to be recovered can flow from one end of the slag water flow channel 11 to the other end of the opposite end; the heat extraction module 12 is located between the two ends of the slag water flow channel 11, and the heat extraction module 12 at least partially extends into the slag water with waste heat to be recovered in the slag water flow channel 11. The heat extraction module 12 can absorb the heat in the slag water with waste heat to be recovered and exchange heat to the heated water. Each group of heat extraction modules 12 is independently controlled.

[0040] The heat extraction module 12 is used as a medium between the waste heat slag water to be recovered and the water to be heated. The waste heat slag water to be recovered and the water to be heated are no longer just directly heat exchanged across the pipe, which solves the problems of scaling, blockage, corrosion and other problems caused by high-slag water on the jacketed heat pipe bundle during waste heat recovery, and realizes effective waste heat recovery of low-temperature, corrosive slag water; the water to be heated reaches a certain temperature through indirect heat exchange with the waste heat slag water to be recovered, and can be used for civilian or production purposes, which solves the problem of heat waste in high-temperature slag water and has high energy utilization rate; the heat extraction module 12 preferably adopts a small size and light weight device to facilitate maintenance, inspection, flushing and slag cleaning.

[0041] like Figures 3 to 7 As shown, the heat extraction module 12 includes at least one upper jacketed heat pipe bundle 124 and a positioning member 122. Each upper jacketed heat pipe bundle 124 includes at least two heat pipes 121 and at least two jacketed tubes 123. That is, the "jacketed tube" is part of the "upper jacketed heat pipe", and the "upper jacketed heat pipe" constitutes the "upper jacketed heat pipe bundle". The slag water waste heat recovery system of this embodiment is designed and manufactured according to this principle. Among them, the light tube-shaped heat pipe 121 includes a lower heat absorption section and an upper heat release section. The heat absorption section extends into the slag water to be recovered waste heat, and the heat release section extends into the upper jacketed tube 123; the heat pipe 121 is filled with a heat transfer medium, which can transfer the heat from the heat absorption section to the heat release section. The specific material of the heat transfer medium is not limited, as long as it has good phase change heat transfer performance and suitable working temperature, pressure and other physical properties. The heat pipe 121 may be made of any material, and may be made of corrosion-resistant steel, anti-corrosion coating, etc., according to the composition of the waste heat slag water to be recovered.

[0042] Positioning members 122, located between the heat absorption section and the heat release section, are used to secure the heat pipe 121 and position the heat extraction module 12. Specifically, a slot 13 is provided on the wall of the slag water flow channel 11. Positioning members 122 overlap and are inserted into slot 13. Fasteners such as bolts are then used to secure the heat extraction module 12.

[0043] Each jacketed tube 123 is sleeved around the outer periphery of the heat release section of each heat pipe 121. A jacketed water flow channel is formed in the jacketed tube 123 for the water to be heated to flow through. The water to be heated can exchange heat with the heat transfer medium in the heat release section. Specifically, a connecting transition pipe 125 is provided on the jacketed tube 123. The end transition pipes are respectively connected to the water inlet manifold 128 and the water outlet manifold 129 in the heat extraction module 12 in which they are located. The low-temperature water to be heated enters through the water inlet manifold 128 in the heat extraction module 12 and is diverted to the jacketed water pipes in the upper jacketed heat pipe bundle 124 of each piece in the module. After heat exchange with the high-temperature waste heat slag water to be recovered, the temperature is increased. The heated water to be heated is then collected in the water outlet manifold 129 in the heat extraction module 12 and connected through the hose 126 to flow into the next heat extraction module 12 to continue heat exchange. In order to improve heat exchange efficiency, the water flow direction of the water to be heated and the waste heat slag water to be recovered is generally countercurrent.

[0044] The jacket water channel is sleeved around the heat release section of the heat pipe 121. The jacket pipe 123 is coaxially arranged with the heat release section of the heat pipe 121. The jacket water channel is an annular cavity between the inner wall of the jacket pipe 123 and the outer wall of the heat release section of the heat pipe 121.

[0045] like Figure 5 and Figure 6 As shown, the outer diameter of the heat pipe 121 is d, the outer diameter of the jacketed tube 123 is D, the center distance between two adjacent heat pipes 121 in the direction of slag water flow is St, and the center distance between two adjacent upper jacketed heat pipe bundles 124 along the direction of slag water flow is SL, St ≥ 2d, SL ≥ 1.1D. The direction of slag water flow and the direction along the slag water flow are preferably perpendicular to each other.

[0046] In this embodiment, the slag water pool heat exchange area 1 includes one or more heat extraction modules 12, and all heat extraction modules 12 can be arranged in a row, a column, or a matrix, which is conducive to improving the heat exchange efficiency. Each heat extraction module 12 can be independently controlled, which is more convenient to use. The number and specifications of the heat pipes 121, the tube spacing between two adjacent heat pipes 121, the row spacing between two adjacent upper jacketed heat pipe bundles 124, and the shape and specification size of the jacket water flow channel are not specifically limited, and can be obtained based on the thermal calculations and structural design of each project. It is preferred to use a large tube spacing between two adjacent heat pipes 121, and staggered or sequential arrangement between each row, which is conducive to flushing and cleaning slag, and can prevent water slag from adhering to, scaling and corroding the pipe wall of the heat absorption section of the heat pipe 121, thereby ensuring the heat exchange effect.

[0047] On the basis of the above structure, at least two jacketed tubes 123 are sequentially connected to form a jacket water pipeline in a layer (a row) of upper jacketed heat pipe bundles 124. A transition tube 125 is provided between two adjacent jacketed tubes 123 in each layer to achieve communication between the two adjacent jacketed tubes 123. The heated water can flow from one jacketed tube 123 to the next jacketed tube 123, thereby extending the flow path of the heated water and achieving more sufficient heat exchange.

[0048] Adjacent rows of heat extraction modules 12 are connected by a hose 126. The hose 126 can be made of any material; however, for enhanced strength and durability, it is preferably made of metal. This allows heated water to flow more smoothly from one heat extraction module 12 to the next, allowing for quick connection and removal.

[0049] The water to be heated is sent into the heat extraction module 12 at one end from the water inlet header 128, and then enters the jacketed heat tube bundles 124 of each row of the heat extraction module 12 in parallel. The water to be heated flows through the jacketed tubes 123 in each row through the transition pipe 125, and then is collected in the water outlet header 129 in the heat extraction module 12 and sent out, and enters the next heat extraction module 12 through the hose 126 to continue heat exchange.

[0050] Based on the above structure, the slag water waste heat recovery system includes at least one set of heat extraction modules 12, running perpendicular to the direction of slag water flow. Each heat extraction module 12 contains multiple rows of upper jacketed heat pipe bundles 124. The heat pipes 121 in two adjacent rows of upper jacketed heat pipe bundles 124 can be arranged in staggered or sequential order. This allows for more complete contact between the heat pipes 121 and the slag water to be recovered, allowing for more heat recovery. Increasing the distance between adjacent heat pipes 121 reduces the resistance encountered by the slag water to be recovered.

[0051] The specific structure of the jacket water flow channel is not limited, as long as it can flow the water to be heated. Figure 8 As shown, the jacket water flow channel is a straight channel 1231, which is easy to process and has a smoother water flow; Figure 9 As shown, the continuous spiral channel 1232, the spiral sheet is welded to the outer wall surface of the heat release section of the heat pipe 121 by high frequency welding or laser welding winding; Figure 10 As shown, the intermittent spiral channel 1233 divides the spiral blades into multiple sections, and the adjacent spiral blades are arranged at intervals. The arrangement of the spiral blades can enhance fluid turbulence and improve heat exchange efficiency.

[0052] The difference between the inner diameter Di of the jacket tube 123 and the outer diameter Df of the spiral blades is between 1 and 6 times the spiral blade pitch t. The thickness δ of the spiral blades is between 0.2 mm and 2 mm. In the intermittent spiral channel 1233, the length S of the non-spiral channel is between 0.1 and 2 times the spiral channel length L.

[0053] Based on the above structure, the slag water waste heat recovery system includes at least two slag water flow channels 11 arranged in parallel along the flow direction of the slag water to be recovered. A vertically arranged slag water inlet pipe 111 and a horizontally arranged slag water inlet terminal 112 are connected at the water inlet end of each slag water flow channel 11. The slag water to be recovered can enter the slag water flow channel 11 through the slag water inlet pipe 111 and the slag water inlet terminal 112. In this embodiment, the slag water waste heat recovery system includes a, b, ..., n slag water flow channels 11 arranged in parallel, totaling n.

[0054] In order to avoid the original slag water in the slag water flow channel 11 from violent churning and turbulence when the waste heat slag water to be recovered enters, each slag water inlet pipe 111 is vertically connected to the bottom of the slag pool, and its end is connected to at least two slag water inlet ends 112. The waste heat slag water to be recovered in the slag water inlet pipe 111 is divided into at least two streams to flow out, ensuring that the original slag water in the high-temperature slag water flow channel 11 can be evenly mixed with the new slag water.

[0055] To further prevent the residual heat recovered slag water from violently churning and disrupting the flow in the slag water flow channel 11 upon entry, the outlet edge of the slag water inlet terminal 112 is cut downward at a 45°±30° angle. Its horizontal edge is a long straight line at its upper end and a short straight line at its lower end. The long top edge prevents the residual heat recovered slag water from moving upward upon exiting the slag water inlet terminal 112, allowing it to fully mix with the slag water at the bottom of the slag water flow channel 11, precipitating as much debris as possible, avoiding water short-circuiting and ensuring sufficient heat exchange.

[0056] Based on the above structure, a heat exchange zone overflow weir 113 is installed at the outlet of each slag water channel 11. A slag water collection pool 114 is formed between the heat exchange zone overflow weir 113 and the end surface of the slag water channel 11. After heat recovery, the slag water evenly overflows the heat exchange zone overflow weir 113 and enters the slag water collection pool 114, ready to be transferred to the next process location. The specific height of the heat exchange zone overflow weir 113 is not limited, as it ensures that the liquid level in the slag water channel 11 is high enough to ensure sufficient contact between the slag water to be recovered and the heat pipe 121, thereby improving heat recovery efficiency.

[0057] like Figure 1 、 Figure 2 and Figure 11 As shown, the auxiliary area 2 of the slag water pool includes at least two slag pools 21, a maintenance pool 22, and an auxiliary slag water collection pool 23. The auxiliary slag water collection pool 23 is connected to the slag water collection pool 114 at the outlet end of the slag water flow channel 11. An auxiliary area water inlet pipe 211 is installed in the slag pool 21 at one end, and an auxiliary area water outlet pipe 212 is installed in the slag pool 21 at the other end. The slag water to be recovered with waste heat enters the auxiliary area 2 of the slag water pool through the auxiliary area water inlet pipe 211 and leaves the auxiliary area 2 of the slag water pool through the auxiliary area water outlet pipe 212.

[0058] The specific number of levels of the sedimentation tank 21 in the auxiliary area 2 of the slag water tank is not limited, and it can fully precipitate the large particles of slag contained in the slag water, and the impurity content of the waste heat slag water to be recovered is relatively reduced, solving the problem that the waste heat slag water to be recovered easily clogs the pipeline. A drop-type overflow weir 24 is set between two adjacent sedimentation tanks 21. Along the flow direction of the waste heat slag water to be recovered, the height of each drop-type overflow weir 24 gradually decreases, which is conducive to the precipitation of granular slag in the slag water. The drop-type overflow weir 24 has a certain height, and the granular slag will settle at the bottom of each sedimentation tank 21. The auxiliary area outlet pipe 212 is connected to the slag water flow channel 11, and the precipitated waste heat slag water to be recovered is extracted and sent to the slag water flow channel 11.

[0059] The maintenance pool 22 is used for maintenance and repair of the heat extraction module 12. The auxiliary area slag water collection pool 23 collects the slag water from the slag water collection pool 114 and then discharges it to the subsequent process.

[0060] In order to improve the sedimentation efficiency, the auxiliary area 2 of the slag water pool includes at least two sedimentation flow channels arranged in parallel along the flow direction of the waste heat slag water to be recovered. Each sedimentation flow channel includes at least two levels of sedimentation pools 21, and all sedimentation flow channels are independent of each other. In this embodiment, there are two sedimentation flow channels, including sedimentation pool I and sedimentation pool II, and a total of four levels of sedimentation pools 21 are set in each sedimentation flow channel. Sedimentation pool I and sedimentation pool II can be activated simultaneously according to the amount of water to be precipitated each time, and more slag water can be processed at the same time; or only sedimentation pool I or sedimentation pool II can be activated. When one sedimentation flow channel is working, the other sedimentation flow channel is cleaned to prepare for the use of the other sedimentation flow channel. The switching or combination of use can be flexibly selected.

[0061] Based on the above structure, the ground preparation area 3 includes a slag flushing water primary filter 31 and a preparation area water pipeline 32. The preparation area water pipeline 32 is connected to the auxiliary area water inlet pipe 211. The waste heat slag water to be recovered discharged from the slag flushing water primary filter 31 enters the slag tank 21 through the preparation area water pipeline 32 and the auxiliary area water inlet pipe 211.

[0062] The slag water pre-filter 31 is preferably a multi-layered, removable structure, with each layer utilizing a grid-type filter screen to remove impurities such as fibers and floating debris from the slag water. After preliminary cleaning, the slag water is delivered to the highest water level of the sedimentation tank 21 via the preparation area water pipeline 32. To prevent splashing and turbulence in the sedimentation tank 21, the end of the preparation area water pipeline 32 extends into the sedimentation tank 21 and approaches the bottom of the sedimentation tank 21. The end of the preparation area water pipeline 32 is cut downward at a 45-degree angle. To prevent churning of the slag water and prolong its residence time in the sedimentation tank 21, the outlet of the preparation area water pipeline 32 faces away from and away from the drop-type overflow weir 24.

[0063] The multi-layer movable extractable structure includes a structure that can be independently extracted, cleaned and replaced layer by layer. The slag water is fed into the upper part of the slag flushing water primary filter 31, flows down naturally, and flows out through the side of the middle and lower part into the sedimentation tank 21.

[0064] Based on the above structure, the hot water output area 4 includes a hot water storage tank 41, at least one user-located hot water tank 42, a hot water delivery pipe 43 connecting the hot water storage tank 41 and the user-located hot water tank 42, and a circulating water return pipe 44. The hot water storage tank 41 is connected to the water outlet header 129 via a pipe and is used to store heated water. The specific number of user-located hot water tanks 42 is not limited and can be determined based on usage requirements.

[0065] The heat extraction module 12 includes a cold water pipe 127 for supplying heated water. A circulating return pipe 44 connects the hot water storage tank 41 and the cold water pipe 127. During periods of low user load or non-use, the circulating return pipe 44 is used for circulating heating, achieving instant heating and instant use, achieving zero-cold-water hot water supply.

[0066] Note that the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. Slag water waste heat recovery system, characterized by: The invention comprises a slag water pool heat exchange area (1), wherein the slag water pool heat exchange area (1) comprises: At least one slag water flow channel (11) for accommodating slag water with waste heat to be recovered, wherein the slag water with waste heat to be recovered can flow from one end of the slag water flow channel (11) to the other end thereof; and At least one group of heat extraction modules (12) is located between the two ends of the slag water flow channel (11), and the heat extraction modules (12) at least partially extend into the waste heat slag water to be recovered in the slag water flow channel (11). The heat extraction modules (12) can absorb heat from the waste heat slag water to be recovered and exchange heat with the water to be heated. Each group of the heat extraction modules (12) is independently controlled.

2. The slag water waste heat recovery system according to claim 1, characterized in that: The heat extraction module (12) comprises: At least one upper jacketed heat pipe bundle (124), each upper jacketed heat pipe bundle (124) comprising at least two heat pipes (121), each heat pipe (121) comprising a lower heat absorbing section and an upper heat releasing section, the heat absorbing section extending into the waste heat slag water to be recovered, and the heat releasing section extending into the jacketed pipe (123); the heat pipe (121) is filled with a heat transfer medium, and the heat transfer medium can transfer heat from the heat absorbing section to the heat releasing section; a positioning member (122) for fixing the heat pipe (121) and positioning the heat extraction module (12); and At least two jacketed tubes (123), each jacketed tube (123) is sleeved on the outer periphery of the heat release section of one of the heat pipes (121), and a jacketed water flow channel for the water to be heated to flow through is formed in the jacketed tube (123), and the water to be heated can exchange heat with the heat transfer medium in the heat release section.

3. The slag water waste heat recovery system according to claim 2, characterized in that: In a single heat extraction module (12), at least two of the jacketed tubes (123) are sequentially connected to form a jacket water flow channel in an upper jacketed heat pipe bundle (124); two adjacent jacketed tubes (123) in the upper jacketed heat pipe bundle (124) are connected by a transition pipe (125); the jacket water flow channels in two adjacent upper jacketed heat pipe bundles (124) are respectively connected to a water inlet manifold (128) and a water outlet manifold (129) via transition pipes (125) at both ends; when there is only one upper jacketed heat pipe bundle (124) in a single heat extraction module (12), the transition pipes for water inlet and outlet of the upper jacketed heat pipe bundle (124) in each heat extraction module (12) are sequentially connected in series via hoses.

4. The slag water waste heat recovery system according to claim 2, characterized in that: In the heat extraction module (12), the heating water flow channels of the jacketed tubes (123) in the single-piece upper jacketed heat pipe bundle (124) flow in series through the transition pipe (125); the jacketed water flow channels between each piece are connected in parallel through the transition pipes at both ends to the water inlet header (128) and the water outlet header (129). Between each of the heat extraction modules (12), the water outlet header (129) of the upper-level heat extraction module (12) is connected to the water inlet header (128) of the lower-level heat extraction module (12) via a hose (126), and the water to be heated between the heat extraction modules (12) is connected in series as a whole.

5. The slag water waste heat recovery system according to any one of claims 2 to 4, characterized in that: In a direction perpendicular to the flow of slag water, the slag water waste heat recovery system comprises one or more groups of the heat extraction modules (12), each group of the heat extraction modules (12) comprises at least one or more upper jacketed heat pipe bundles (124), and the heat pipes (121) in two adjacent upper jacketed heat pipe bundles (124) are arranged in a staggered or sequential manner.

6. The slag water waste heat recovery system according to claim 2, characterized in that: The jacket water flow channel is a straight-through channel (1231), a continuous spiral channel (1232) or an intermittent spiral channel (1233).

7. The slag water waste heat recovery system according to any one of claims 1 to 4, characterized in that: Along the flow direction of the waste heat slag water to be recovered, the waste heat recovery system for slag water comprises one or at least two slag water flow channels (11) arranged in parallel, and a connected slag water inlet pipe (111) and a slag water inlet end head (112) are provided at the water inlet end of each slag water flow channel (11), and the horizontal outlet pipe opening of the slag water inlet end head (112) is inclined downward at a 45°±30° angle, and the upper end of the horizontal pipe opening edge is a long plain line, and the lower end is a short plain line; a heat exchange zone overflow weir (113) is provided at the water outlet end of each slag water flow channel (11), and a slag water collection pool (114) is formed between the heat exchange zone overflow weir (113) and the end face of the slag water flow channel (11).

8. The slag water waste heat recovery system according to any one of claims 1 to 4, characterized in that: The slag water waste heat recovery system comprises a slag water pool auxiliary area (2), the slag water pool auxiliary area (2) comprises a first-level and above sedimentation pool (21), a maintenance pool (22) and an auxiliary area slag water collection pool (23), the auxiliary area slag water collection pool (23) is connected to the slag water collection pool (114) at the outlet end of the slag water flow channel (11); an auxiliary area water inlet pipe (211) is installed in the sedimentation pool (21) at one end, and an auxiliary area water outlet pipe (211) is installed in the sedimentation pool (21) at the other end. 212), the waste heat slag water to be recovered enters the slag water pool auxiliary area (2) through the auxiliary area water inlet pipe (211) and leaves the slag water pool auxiliary area (2) through the auxiliary area water outlet pipe (212), a drop-type overflow weir (24) is provided between two adjacent sedimentation tanks (21), and along the flow direction of the waste heat slag water to be recovered, the height of each drop-type overflow weir (24) gradually decreases, and the auxiliary area water outlet pipe (212) is connected to the slag water flow channel (11).

9. The slag water waste heat recovery system according to claim 8, characterized in that: Along the flow direction of the waste heat slag water to be recovered, the slag water pool auxiliary area (2) includes one or at least two sediment flow channels arranged in parallel, each of the sediment flow channels includes the sediment pool (21) of the first level or above, and all the sediment flow channels are independent of each other.

10. The slag water waste heat recovery system according to claim 8, characterized in that: The slag water waste heat recovery system further comprises a ground preparation area (3), the ground preparation area (3) comprising a slag flushing water primary filter (31) and a preparation area water pipeline (32), the preparation area water pipeline (32) being connected to the auxiliary area water inlet pipe (211), and the slag water to be recovered from the slag flushing water primary filter (31) enters the sedimentation tank (21) through the preparation area water pipeline (32) and the auxiliary area water inlet pipe (211); or, The slag water waste heat recovery system further comprises a hot water output area (4), the hot water output area (4) comprising a hot water storage tank (41), at least one user point hot water tank (42), a hot water delivery pipe (43) connected between the hot water storage tank (41) and the user point hot water tank (42), and a circulating return pipe (44), the hot water storage tank (41) being in communication with a water outlet header (129) of the heat extraction module (12) at the terminal end of the heating water flow channel, the heat extraction module (12) being in communication with a cold water pipe (127) for supplying water to be heated, and the circulating return pipe (44) being in communication between the hot water storage tank (41) and the cold water pipe (127).

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