Slag water waste heat recovery system
By using upper jacketed heat pipe bundles and heat transfer working fluid in the slag water waste heat recovery system for indirect heat exchange, the problem of difficult heat in slag water is solved, the energy utilization rate is improved and the failure rate is reduced, and the correct Effective recycling of high slag water.
Patent Information
- Application Number
- CN202411469091.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-21
- Publication Date
- 2024-12-06
AI Technical Summary
The existing slag water waste heat recovery devices have problems such as scale, blockage, and corrosion in high slag water, resulting in high failure rate and difficulty in effectively recycling heat.
A slag water waste heat recovery system is designed, using an upper jacketed heat pipe bundle as a heat extraction module, which transfers heat in the heat pipe through the heat transfer working fluid, and indirect heat exchange with the water to be heated to avoid direct heat exchange and independently control it. Each set of heat extraction modules uses jacketed water runners to exchange heat to reduce the risk of corrosion and blockage of equipment by impurities.
It realizes effective waste heat recovery of low-temperature and corrosive slag-containing water, improves energy utilization, reduces failure rate, and is easy to maintain and use.
Smart Images
Figure CN119085351A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of waste heat recovery devices, and in particular to a slag water waste heat recovery system. Background Art
[0002] In the metallurgical industry, including ferrous and nonferrous metallurgy, especially in blast furnace ironmaking, the mainstream process for rapid cooling and granulation of high-temperature molten slag is still the water quenching method, which uses high-pressure water to crush and rapidly cool the slag. The water quenching method consumes a lot of water, but the water used can be recycled after treatment.
[0003] The commonly used treatment method at present is to send the slag water at 60℃-95℃ after slag washing to an air cooling tower after sedimentation and filtration, and then recycle the slag water after cooling. The heat in the high-temperature slag water is directly dissipated, which wastes energy and pollutes the environment.
[0004] Some existing heat exchange devices can introduce slag water into a water pool, and a cold water pipe is set in the water pool. When the cold water flows through the cold water pipe, it can exchange heat with the slag water. The defects of this low-temperature waste heat recovery method include: the slag water has a high impurity content and is corrosive, which can easily cause corrosion, wear, and blockage to heat exchange components such as cold water pipes, and the heat exchange device has a high failure rate and poor user experience. Summary of the invention
[0005] The purpose of the present invention is to provide 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 object, the present invention adopts the following technical solutions:
[0007] The slag water waste heat recovery system comprises a slag water pool heat exchange area, wherein the slag water pool heat exchange area comprises: at least one slag water flow channel for accommodating the waste heat slag water to be recovered, wherein 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, wherein the heat extraction modules at least partially extend into the waste heat slag water to be recovered in the slag water flow channel, wherein the heat extraction modules can absorb the heat in the waste heat slag water to be recovered and exchange the heat with the heated 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 of the upper jacketed heat pipe bundle includes at least two heat pipes, each of the heat pipes 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 is used to fix the heat pipe and position the heat extraction module; and at least two jacket pipes, each of which 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 of the preferred embodiments, 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, 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 pipes for 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 jacket tube in the single-piece upper jacket heat tube bundle flow in series through a transition pipe; the jacket water flow channels between each piece are connected to the water inlet header and the water outlet header respectively through 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 next-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, along the direction perpendicular to the flow of slag water, the slag water waste heat recovery system includes one or more groups of the heat extraction modules, 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 arranged in staggered or sequential arrangement.
[0012] In one preferred embodiment, the jacket water flow channel is a straight flow channel, a continuous spiral channel or an intermittent 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 terminal are arranged at the water inlet end of each of the slag water flow channels, and the horizontal water outlet pipe opening of the slag water inlet terminal is a downward oblique cut of 45°±30°, 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 is arranged 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 an auxiliary area of a slag water pool, and the auxiliary area of the slag water pool includes a first-level and above slag pool, a maintenance pool and an auxiliary area slag water collecting pool, and the auxiliary area slag water collecting pool is connected with the slag water collecting pool at the outlet end of the slag water flow channel; an auxiliary area water inlet pipe is installed in the slag pool at one end, and an auxiliary area water outlet pipe is installed in the slag pool at the other end, and the waste heat slag water to be recovered enters the auxiliary area of the slag water pool through the auxiliary area water inlet pipe and leaves the auxiliary area of the slag water pool through the auxiliary area water outlet pipe, and a drop-type overflow weir is arranged between two adjacent slag 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 slag water pool auxiliary area 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, and the preparation area water pipeline is connected to the auxiliary area water inlet pipe. The slag water with waste heat to be recovered discharged from the slag flushing water primary filter enters the slag 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 in the present invention comprises a slag water pool heat exchange zone. 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 heat with the water to be heated. The heat extraction module 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 through a pipeline, so that the scaling, blockage, corrosion and other problems caused by high slag water on the jacketed heat pipe bundle in the waste heat recovery are solved, and effective waste heat recovery of low-temperature, corrosive slag water is achieved; 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 civil or production purposes, so the problem of heat waste in high-temperature slag water is solved, and the energy utilization rate is high; the heat extraction module preferably adopts a small-volume, light-weight device for easy maintenance, inspection, flushing and slag cleaning. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a plan schematic diagram of a slag water waste heat recovery system provided in a specific embodiment of the present invention;
[0020] Figure 2 It is a combined plan view of a slag water pool heat exchange area and a slag water pool auxiliary area provided by a specific embodiment of the present invention;
[0021] Figure 3 It is a schematic elevation view of a slag water pool heat exchange area provided in a specific embodiment of the present invention;
[0022] Figure 4 yes Figure 3 A partial enlarged view of the middle A;
[0023] Figure 5 is a front view of a heat extraction module provided in a specific embodiment of the present invention;
[0024] Figure 6 It is a left view of a heat extraction module provided in a specific embodiment of the present invention;
[0025] Figure 7 is a top view of a heat extraction module provided in a specific embodiment of the present invention;
[0026] Figure 8 It is a schematic diagram of the combined structure of a first heat pipe and a jacketed pipe provided in a specific embodiment of the present invention;
[0027] Fig. 9 is a schematic diagram of a combined structure of a second heat pipe and a jacketed pipe provided in a specific embodiment of the present invention;
[0028] Fig.10 It is a schematic diagram of the combined structure of a third heat pipe and a jacketed pipe provided in a specific embodiment of the present invention;
[0029] Fig.11It is a schematic elevation view of the auxiliary area of the slag water pool provided in a specific embodiment of the present invention.
[0030] In the figure:
[0031] 1. Heat exchange area of slag water pool; 2. Auxiliary area of slag water pool; 3. Ground preparation area; 4. Hot water output area; 11. Slag water flow channel; 12. Heat extraction module; 13. Card slot; 21. Sedimentation pool; 22. Maintenance pool; 23. Slag water collection pool in auxiliary area; 24. Drop overflow weir; 31. Slag flushing 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 pool; 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] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by 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 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.
[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not 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 invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0035] 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 connection; it can be a mechanical connection or an electrical connection; 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.
[0036] In the present invention, 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.
[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 a central 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 a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.
[0038] This embodiment discloses a slag water waste heat recovery system. Figure 1 and Figure 2 As shown, the slag water waste heat recovery system may selectively 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 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 11 to the other 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 waste heat slag water to be recovered in the slag water flow channel 11. The heat extraction module 12 can absorb the heat in the waste heat slag water to be recovered and exchange heat with the hot water to be heated, and 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 through the pipeline, which solves the scaling, blockage, corrosion and other problems caused by high-slag water on the jacketed heat tube 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, which can be used for civil or production purposes, and solves the problem of heat waste in high-temperature slag water, with 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, and 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 a 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 waste heat slag water to be recovered, and the heat release section extends into the upper jacketed tube 123; the heat pipe 121 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. The specific material of the heat transfer medium is not limited, and it only needs to have good phase change heat transfer performance and suitable working temperature, pressure and other physical properties. The preparation material of the heat pipe 121 is not limited, and the corresponding corrosion-resistant steel, anti-corrosion coating, etc. can be selected according to the composition of the waste heat slag water to be recovered.
[0042] The positioning member 122 located between the heat absorption section and the heat release section is used to fix the heat pipe 121 and position the heat extraction module 12. Specifically, a slot 13 is provided on the wall surface of the slag water flow channel 11, and the positioning member 122 is overlapped around and inserted into the slot 13, and then fixed with fasteners such as bolts to achieve the installation and fixation of the heat extraction module 12.
[0043] Each jacket tube 123 is sleeved on the outer periphery of the heat release section of each heat pipe 121, and a jacket water flow channel for the water to be heated to flow through is formed in the jacket tube 123, and 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 jacket tube 123, and the end transition pipes are respectively connected to the water inlet header 128 and the water outlet header 129 in the heat extraction module 12. The low-temperature water to be heated enters through the water inlet header 128 in the heat extraction module 12, and is diverted to the jacket water pipeline in the upper jacket 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 header 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 the 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 on the outer periphery of 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, and the jacket water channel is an annular cavity between the inner wall surface of the jacket pipe 123 and the outer wall surface 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 jacket pipe 123 is D, the center distance between two adjacent heat pipes 121 in the slag water flow direction is St, and the center distance between two adjacent upper jacket heat pipe bundles 124 along the slag water flow direction is SL, St≥2d, SL≥1.1D. The slag water flow direction and the slag water flow direction 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 the jacketed heat pipe bundles 124 on two adjacent pieces, and the shape and specification size of the jacket water flow channel are not specifically limited, and can be obtained according to the thermal calculation 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 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 piece (a row) of upper jacketed heat tube bundles 124, and a transition tube 125 is connected between two adjacent jacketed tubes 123 in each piece to achieve the connection between the two adjacent jacketed tubes 123, so that the water to be heated can flow from one jacketed tube 123 to the next jacketed tube 123, thereby extending the flow path of the water to be heated and achieving more complete heat exchange.
[0048] Two adjacent rows of heat extraction modules 12 are connected by a hose 126. The material of the hose 126 is not limited. In order to improve strength and durability, the hose 126 is made of a metal material, so that the heated water can flow more smoothly from the previous heat extraction module 12 to the next heat extraction module 12, and can be quickly connected and disassembled.
[0049] The water to be heated is sent into the heat extraction module 12 at one end through the water inlet header 128 at that end, 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] On the basis of the above structure, the slag water waste heat recovery system includes at least one group of heat extraction modules 12 in a direction perpendicular to the flow of slag water. A single group of heat extraction modules 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 rows. The heat pipes 121 are in more complete contact with the waste heat slag water to be recovered, and more heat can be recovered; the distance between two adjacent heat pipes 121 is increased, and the resistance encountered by the waste heat slag water to be recovered when flowing is smaller.
[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 smoother water flow; Fig. 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; Fig.10 As shown, the intermittent spiral channel 1233 divides the spiral blades into multiple sections, and two adjacent sections of 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 sheet is between 1 and 6 times the spiral sheet pitch t; the thickness δ of the spiral sheet 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 length L of the spiral channel.
[0053] On the basis of the above structure, along the flow direction of the waste heat slag water to be recovered, the slag water waste heat recovery system includes at least two slag water flow channels 11 arranged in parallel, and a vertically arranged slag water inlet pipe 111 and a horizontally arranged slag water inlet terminal 112 connected to each other are arranged at the water inlet end of each slag water flow channel 11, and the waste heat 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 arranged in parallel, a total of n slag water flow channels 11.
[0054] In order to avoid violent churning and disturbance of the original slag water in the slag water flow channel 11 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 at least two slag water inlet terminals 112 are connected to its end. The waste heat slag water to be recovered in the slag water inlet pipe 111 is divided into at least two flows to ensure that the original slag water in the high-temperature slag water flow channel 11 can be evenly mixed with the new slag water.
[0055] In order to further prevent the original slag water in the slag water flow channel 11 from violently churning and disturbing when the waste heat slag water to be recovered enters, the water outlet edge of the slag water inlet terminal 112 is cut downward at a 45°±30° angle, and the upper end of its horizontal edge is a long line and the lower end is a short line. The longer top can prevent the waste heat slag water to be recovered from moving upward at the moment of leaving the slag water inlet terminal 112, so that the waste heat slag water to be recovered is more fully mixed with the slag water at the bottom of the slag water flow channel 11, and the residue in the slag water is precipitated as much as possible, avoiding water short circuit and fully exchanging heat.
[0056] On the basis of the above structure, a heat exchange zone overflow weir 113 is provided at the 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 surface of the slag water flow channel 11. The slag water that has completed heat recovery evenly overflows the heat exchange zone overflow weir 113 and enters the slag water collection pool 114, ready to enter the next process position. The specific height of the heat exchange zone overflow weir 113 is not limited, and it can ensure that the liquid level height in the slag water flow channel 11 is conducive to the full contact between the waste heat slag water to be recovered and the heat pipe 121, and the heat recovery efficiency is higher.
[0057] like Figure 1 , Figure 2 and Fig.11 As shown, the auxiliary area 2 of the slag water pool includes at least two-stage sedimentation pools 21, a maintenance pool 22, and an auxiliary area slag water collection pool 23, and 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 212 is installed in the sedimentation pool 21 at the other end. The waste heat slag water to be recovered 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 the large particles of slag contained in the slag water can be fully precipitated, and the impurity content of the waste heat slag water to be recovered is relatively reduced, which solves the problem that the waste heat slag water to be recovered is easy to block the pipeline. A drop-type overflow weir 24 is arranged 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 be precipitated 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 maintaining and repairing the heat extraction module 12, and 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, along the flow direction of the waste heat slag water to be recovered, the slag water pool auxiliary area 2 includes at least two sedimentation flow channels arranged in parallel, each sedimentation flow channel includes at least two 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 sedimentation pools 21 are set in each sedimentation flow channel. Sedimentation pool I and sedimentation pool II can be activated at the same time 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, and one sedimentation flow channel is cleaned when the other sedimentation flow channel is working, and preparations are made for the use of the other sedimentation flow channel. The switching or combined use method can be flexibly selected.
[0061] On the basis of 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 primary filter 31 is preferably a multi-layer movable extractable structure, each layer uses a grid-type filter screen to filter out impurities such as fibers and floating objects entrained in the slag water. The slag water after preliminary cleaning is sent to the slag pool 21 at the highest water level through the preparation area water pipeline 32. In order to avoid splashing and turbulence in the slag pool 21, the end of the preparation area water pipeline 32 extends into the slag pool 21 and is close to the bottom of the slag pool 21. The end of the preparation area water pipeline 32 is cut downward at a 45° angle. In order to prevent the slag water from churning and prolong the residence time of the slag water in the slag pool 21, the outlet end of the preparation area water pipeline 32 is facing 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 middle and lower side to enter the sedimentation tank 21.
[0064] On the basis of the above structure, the hot water output area 4 includes 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 water return pipe 44. The hot water storage tank 41 is connected to the water outlet header 129 through a pipeline for storing heated water; the specific number of the user point hot water tanks 42 is not limited and can be determined according to usage requirements.
[0065] The heat extraction module 12 includes a cold water pipe 127 for supplying water to be heated, and a circulating return pipe 44 is connected between the hot water storage tank 41 and the cold water pipe 127. During the non-use period or low-load use period of the user, the circulating return pipe 44 is used for circulation heating, so that the water can be heated and used immediately, realizing zero cold water hot water supply.
[0066] Note that the above are only preferred embodiments of the present invention and the technical principles used. 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 is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims
1. Slag water waste heat recovery system, characterized in that: 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, and 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 of the upper jacketed heat pipe bundles (124) comprising at least two heat pipes (121), each of the heat pipes (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 the heat of 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 jacket tubes (123), each jacket tube (123) is sleeved on the outer periphery of the heat release section of one of the heat pipes (121), and a jacket water flow channel is formed in the jacket tube (123) for the water to be heated to flow through, and the water to be heated can perform heat exchange 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); and the jacket water flow channels in two adjacent upper jacketed heat pipe bundles (124) are respectively connected to a water inlet header (128) and a water outlet header (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 tube 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 heat extraction module (12) at the previous stage is connected to the water inlet header (128) of the heat extraction module (12) at the next stage 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: Along 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-flow 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 slag water with waste heat to be recovered, the slag water waste heat recovery system 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 terminal (112) are arranged at the water inlet end of each slag water flow channel (11), and the horizontal water outlet pipe opening of the slag water inlet terminal (112) is inclined downward at an angle of 45°±30°, and the upper end of the horizontal pipe opening edge is a long straight line, and the lower end is a short straight line; a heat exchange zone overflow weir (113) is arranged 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); the sedimentation pool (21) at one end is equipped with an auxiliary area water inlet pipe (211), and the sedimentation pool (21) at the other end is equipped with an auxiliary area water outlet pipe (211). 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 arranged between two adjacent slag pools (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 one or more sediment pools (21) of the first level, 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) comprises 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), and the waste heat slag water to be recovered discharged from the slag flushing water primary filter (31) enters the slag 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 also includes a hot water output area (4), the hot water output area (4) includes 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) is connected to the water outlet header (129) of the heat extraction module (12) at the end of the heating water flow channel, the heat extraction module (12) is connected to a cold water pipe (127) for supplying water to be heated, and the circulating return pipe (44) is connected between the hot water storage tank (41) and the cold water pipe (127).