Waste heat recovery system

Abstract

The utility model relates to the technical field of waste heat recovery, and provides a waste heat recovery system which comprises a heat source module, a low-temperature circulation pipeline and a high-temperature circulation pipeline, and the heat source module comprises a low-temperature heat source and a high-temperature heat source; the low-temperature circulation pipeline sequentially communicates with a low-temperature heat collection module and a low-temperature utilization module, and the low-temperature heat collection module is used for conducting heat of a low-temperature heat source to low-concentration inorganic salt hydrate slurry in the low-temperature circulation pipeline; the low-temperature utilization module is used for transferring the heat of the low-concentration inorganic salt hydrate slurry to a heat utilization end; the high-temperature circulation pipeline sequentially communicates with a high-temperature heat collection module and a high-temperature utilization module, and the high-temperature heat collection module is used for conducting heat of a high-temperature heat source to high-concentration inorganic salt hydrate slurry in the high-temperature circulation pipeline; and the high-temperature utilization module is used for transferring the heat of the high-concentration inorganic salt hydrate slurry to a heat utilization end. The waste heat recovery system provided by the utility model can solve the problem of collection and treatment of discontinuous waste heat of different grades.

Description

Technical Field

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

[0002] There is a large amount of waste heat in industrial production, which will cause huge waste if it is not recycled. However, most of the waste heat from industrial production is discontinuous and of different grades, which makes the process of waste heat collection and utilization very difficult. In existing factories, the heat in the waste heat is generally directly transferred to the circulating water through a heat exchanger, and the circulating water is used to heat the user end. However, due to the discontinuous and different grades of waste heat, the heat energy obtained by the user end is also discontinuous and of different grades. Utility Model Content

[0003] The utility model provides a waste heat recovery system to solve the defects of discontinuity and different grades of waste heat energy in the prior art. Through targeted treatment of waste heat of different grades by low-temperature circulation pipelines and high-temperature circulation pipelines, the discontinuous and different grades of heat energy in the waste heat can be converted into stable and continuous heat energy.

[0004] The waste heat recovery system provided by the utility model comprises:

[0005] A heat source module, including a low-temperature heat source and a high-temperature heat source;

[0006] The low-temperature circulation pipeline is connected with a low-temperature heat collection module and a low-temperature utilization module in sequence, wherein the low-temperature heat collection module is used to transfer the heat of the low-temperature heat source to the low-concentration inorganic salt hydrate slurry in the low-temperature circulation pipeline; and the low-temperature utilization module is used to transfer the heat of the low-concentration inorganic salt hydrate slurry to the heat-using end;

[0007] The high-temperature circulation pipeline is connected in sequence with a high-temperature heat collection module and a high-temperature utilization module. The high-temperature heat collection module is used to transfer the heat of the high-temperature heat source to the high-concentration inorganic salt hydrate slurry in the high-temperature circulation pipeline; the high-temperature utilization module is used to transfer the heat of the high-concentration inorganic salt hydrate slurry to the heat-using end.

[0008] According to the waste heat recovery system provided by the utility model, the low-temperature circulation pipeline also includes a first storage tank, which is arranged between the low-temperature heat collection module and the low-temperature utilization module and is connected to the low-temperature heat collection module and the low-temperature utilization module, and the first storage tank is used to store the low-concentration inorganic salt hydrate slurry;

[0009] The high-temperature circulation pipeline also includes a second storage tank, which is arranged between the high-temperature heat collection module and the high-temperature utilization module and is connected to the high-temperature heat collection module and the high-temperature utilization module. The second storage tank is used to store the high-concentration inorganic salt hydrate slurry.

[0010] According to the waste heat recovery system provided by the utility model, the first storage tank includes a first cavity and a second cavity arranged at intervals;

[0011] One end of the first cavity is connected to the inlet end of the low-temperature heat collection module, and the other end is connected to the outlet end of the low-temperature utilization module;

[0012] One end of the second cavity is connected to the outlet end of the low-temperature heat collection module, and the other end is connected to the inlet end of the low-temperature utilization module.

[0013] According to the waste heat recovery system provided by the utility model, the second storage tank includes a third cavity and a fourth cavity which are arranged at intervals;

[0014] One end of the third cavity is connected to the inlet end of the high-temperature heat collection module, and the other end is connected to the outlet end of the high-temperature utilization module;

[0015] One end of the fourth cavity is communicated with the outlet end of the high-temperature heat collection module, and the other end is communicated with the inlet end of the high-temperature utilization module.

[0016] According to the waste heat recovery system provided by the utility model, it also includes a regulating device, one end of which is connected to the first storage tank, and the other end is connected to the second storage tank, and the regulating device is used to adjust the concentration of the low-concentration inorganic salt hydrate slurry in the first storage tank and the high-concentration inorganic salt hydrate slurry in the second storage tank.

[0017] The waste heat recovery system provided by the utility model further comprises a heat-using pipeline, wherein the inlet end of the heat-using pipeline is connected to an external heat source, and the outlet end of the heat-using pipeline is connected to the heat-using end;

[0018] The low-temperature utilization module and the high-temperature utilization module are both installed in the heat utilization pipeline, and the high-temperature utilization module is installed on a side of the low-temperature utilization module away from the inlet end of the heat utilization pipeline.

[0019] According to the waste heat recovery system provided by the utility model, the heat-using end includes a high-temperature heat-using end and a medium-temperature heat-using end, the high-temperature heat-using end is connected to the outlet end of the heat-using pipeline, the medium-temperature heat-using end is connected in parallel with the high-temperature heat-using end, and is arranged between the low-temperature utilization module and the high-temperature utilization module.

[0020] According to the waste heat recovery system provided by the utility model, the external heat source includes an external low-temperature heat source and an external medium-temperature heat source, the external low-temperature heat source is connected to the inlet end of the heat pipeline, the external medium-temperature heat source is connected in parallel with the external low-temperature heat source, and is arranged between the medium-temperature heat end and the high-temperature utilization module.

[0021] According to the waste heat recovery system provided by the utility model, the low-temperature utilization module includes a low-temperature utilization circulation pipeline, and the low-temperature utilization circulation pipeline includes a low-temperature evaporator, a low-temperature compressor and a low-temperature condenser connected in sequence. The low-temperature medium in the low-temperature utilization circulation pipeline is suitable for heat exchange with the low-concentration inorganic salt hydrate slurry through the low-temperature evaporator; the low-temperature compressor is used to compress the low-temperature medium; and the low-temperature condenser is used to transfer the heat of the low-temperature medium to the heat-using end.

[0022] According to the waste heat recovery system provided by the utility model, the high-temperature utilization module includes a high-temperature utilization circulation pipeline, and the high-temperature utilization circulation pipeline includes a high-temperature evaporator, a high-temperature compressor and a high-temperature condenser connected in sequence. The high-temperature medium in the high-temperature utilization circulation pipeline is suitable for heat exchange with the low-concentration inorganic salt hydrate slurry through the high-temperature evaporator; the high-temperature compressor is used to compress the high-temperature medium; and the high-temperature condenser is used to transfer the heat of the high-temperature medium to the heat-using end.

[0023] According to the waste heat recovery system provided by the utility model, the low-temperature heat collection module includes at least one low-temperature heat collection pipeline, the inlet end of the low-temperature heat collection pipeline is connected to the outlet end of the low-temperature utilization module, and the outlet end of the low-temperature heat collection pipeline is connected to the inlet end of the low-temperature utilization module;

[0024] The high temperature heat collection module comprises at least one high temperature heat collection pipeline, the inlet end of the high temperature heat collection pipeline is connected with the outlet end of the high temperature utilization module, and the outlet end of the high temperature heat collection pipeline is connected with the inlet end of the high temperature utilization module.

[0025] The waste heat recovery system provided by the embodiment of the utility model can collect heat from industrial waste heat and store the waste heat in a low-concentration inorganic salt hydrate slurry in the pipeline by setting a low-temperature heat collection module in the low-temperature circulation pipeline. Since the low-concentration hydrate slurry has a good heat storage capacity, the problem of discontinuous waste heat can be avoided in the process of collecting waste heat, and the discontinuous thermal energy generated by the discontinuous waste heat can be converted into stable thermal energy concentrated in the low-concentration inorganic salt hydrate slurry. Furthermore, the stable thermal energy in the low-concentration inorganic salt hydrate slurry is transferred to the heat-using end through the low-temperature utilization module set in the low-temperature circulation pipeline, so as to provide a stable heat source for users at the heat-using end, thereby avoiding the waste of thermal energy caused by discontinuous waste heat.

[0026] Furthermore, the waste heat recovery system provided in the embodiment of the utility model is also provided with a high-temperature circulation pipeline in parallel with the low-temperature circulation pipeline. On the basis of also converting discontinuous heat energy in waste heat into stable heat energy, the low-temperature circulation pipeline and the high-temperature circulation pipeline are used to treat waste heat of different grades in a targeted manner, thereby solving the problem of collecting and treating waste heat of different grades. Compared with the traditional circulating water heat collection in the prior art, the waste heat recovery system provided in the embodiment of the utility model collects the heat of the low-temperature heat source and the high-temperature heat source respectively through the low-temperature circulation pipeline and the high-temperature circulation pipeline, and stores the heat through the low-concentration inorganic salt hydrate slurry and the high-concentration inorganic salt hydrate slurry and provides heat to the heat-using end, thereby solving the problem of difficulty in collecting and utilizing waste heat in the prior art due to discontinuous waste heat and different grades, greatly improving the collection efficiency and collection upper limit of waste heat recovery, reducing energy waste and reducing the cost of industrial production through the reuse of waste heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 This is a schematic diagram of the piping connection of the waste heat recovery system provided by the embodiment of the utility model;

[0029] Figure 2 This is a schematic diagram of the pipeline connection of the low temperature utilization module provided by the embodiment of the utility model;

[0030] Figure 3 This is a schematic diagram of the pipeline connection of the high temperature utilization module provided by the embodiment of the utility model;

[0031] Figure 4 This is a schematic diagram of the pipeline connection of the low-temperature heat collection module provided in the embodiment of the utility model;

[0032] Figure 5 It is a schematic diagram of the pipeline connection of the high-temperature heat collection module provided in the embodiment of the utility model.

[0033] Reference numerals:

[0034] 100: low temperature circulation pipeline; 110: low temperature heat collection module; 111: low temperature heat collection pipeline; 120: low temperature utilization module; 121: low temperature utilization circulation pipeline; 122: low temperature evaporator; 123: low temperature compressor; 124: low temperature condenser; 130: first storage tank; 131: first cavity; 132: second cavity; 140: low temperature slurry pump; 150: low temperature solution pump;

[0035] 200: high temperature circulation pipeline; 210: high temperature heat collection module; 211: high temperature heat collection pipeline; 220: high temperature utilization module; 221: high temperature utilization circulation pipeline; 222: high temperature evaporator; 223: high temperature compressor; 224: high temperature condenser; 230: second storage tank; 231: third cavity; 232: fourth cavity; 240: high temperature slurry pump; 250: high temperature solution pump;

[0036] 300: hot end; 310: hot end for high temperature; 320: hot end for medium temperature; 400: heat pipe; 410: first regulating valve; 420: second regulating valve; 430: third regulating valve; 500: external heat source; 510: external low-temperature heat source; 520: external medium-temperature heat source; 600: regulating device. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" 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 directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0039] In the embodiments of the present application, 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.

[0040] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0041] Figure 1 This is a schematic diagram of the piping connection of the waste heat recovery system provided by the embodiment of the utility model. (It should be noted that the arrows in the piping diagram indicate the flow direction of the fluid in the piping)

[0042] See also Figure 1 The utility model provides a waste heat recovery system. It should be noted that the utility model can be applied in process production as well as in products such as automobiles. Specifically, it can be adaptively designed according to actual needs. The utility model embodiment intends to use the waste heat recovery system in an industrial production process as an example and explanation.

[0043] Continue reading Figure 1 The waste heat recovery system provided by the utility model includes a heat source module, a low-temperature circulation pipeline 100 and a high-temperature circulation pipeline 200. The heat source module includes a low-temperature heat source and a high-temperature heat source; the low-temperature circulation pipeline 100 and the high-temperature circulation pipeline 200 are connected in parallel. It should be noted that the low-temperature circulation pipeline 100 and the high-temperature circulation pipeline 200 are both closed-loop pipelines. In other words, the pipelines are connected end to end.

[0044] Among them, the medium flowing in the low-temperature circulation pipeline 100 and the high-temperature circulation pipeline 200 is a low-concentration inorganic salt hydrate slurry and a high-concentration inorganic salt hydrate slurry, respectively. It should be noted here that the inorganic salt hydrate slurry is a mixture of inorganic salts dissolved in water. The state of the mixture is affected by temperature and will present two states: pure liquid and solid-liquid mixture. The inorganic salt in the inorganic salt hydrate slurry will absorb or release a large amount of heat when a phase change occurs. Generally speaking, the phase change temperature of the high-concentration inorganic salt hydrate slurry is higher, and the phase change temperature of the low-concentration inorganic salt hydrate slurry is lower. This characteristic can be used to realize the independent storage and utilization of different grades of thermal energy. Compared with pure water, the inorganic salt hydrate slurry has a higher energy density and can store a large amount of heat.

[0045] It should also be noted here that the aforementioned low-concentration inorganic salt hydrate slurry and high-concentration inorganic salt hydrate slurry refer to two different inorganic salt hydrate slurries caused by different inorganic salt concentrations. In actual use, the low-concentration inorganic salt hydrate slurry and the high-concentration inorganic salt hydrate slurry can be formulated according to actual use needs, and the embodiments of the present utility model are not limited here.

[0046] Continue reading Figure 1 The low-temperature circulation pipeline 100 is sequentially connected with a low-temperature heat collection module 110 and a low-temperature utilization module 120. The low-temperature heat collection module 110 is used to transfer the heat of the low-temperature heat source to the low-concentration inorganic salt hydrate slurry in the low-temperature circulation pipeline 100, and the low-temperature utilization module 120 is used to transfer the heat of the low-concentration inorganic salt hydrate slurry to the heat-using end 300; the high-temperature circulation pipeline 200 is sequentially connected with a high-temperature heat collection module 210 and a high-temperature utilization module 220. The high-temperature heat collection module 210 is used to transfer the heat of the high-temperature heat source to the high-concentration inorganic salt hydrate slurry in the high-temperature circulation pipeline 200; the high-temperature utilization module 220 is used to transfer the heat of the high-concentration inorganic salt hydrate slurry to the heat-using end 300.

[0047] See also Figure 1 It can be understood that the waste heat recovery system provided by the embodiment of the utility model can collect heat from industrial waste heat and store the waste heat in the low-concentration inorganic salt hydrate slurry in the pipeline by setting a low-temperature heat collection module 110 in the low-temperature circulation pipeline 100. Since the low-concentration hydrate slurry has a good heat storage capacity, in this way, in the process of collecting waste heat, the problem of discontinuous waste heat can be avoided, and the discontinuous heat energy generated by discontinuous waste heat can be converted into stable heat energy concentrated in the low-concentration inorganic salt hydrate slurry. Furthermore, the stable heat energy in the low-concentration inorganic salt hydrate slurry is transferred to the heat-using end 300 through the low-temperature utilization module 120 set in the low-temperature circulation pipeline 100, so as to provide a stable heat source for users of the heat-using end 300, and avoid the waste of heat energy caused by discontinuous waste heat.

[0048] Furthermore, the waste heat recovery system provided in the embodiment of the utility model is also provided with a high-temperature circulation pipeline 200 in parallel with the low-temperature circulation pipeline 100. On the basis of also converting discontinuous heat energy in waste heat into stable heat energy, the low-temperature circulation pipeline 100 and the high-temperature circulation pipeline 200 specifically treat waste heat of different grades, thereby solving the problem of collecting and treating waste heat of different grades. Compared with the traditional circulating water heat collection in the prior art, the waste heat recovery system provided in the embodiment of the utility model collects heat from the low-temperature heat source and the high-temperature heat source through the low-temperature circulation pipeline 100 and the high-temperature circulation pipeline 200 respectively, and stores the heat through the low-concentration inorganic salt hydrate slurry and the high-concentration inorganic salt hydrate slurry and provides heat to the heat-using end 300, thereby solving the problem of difficulty in collecting and utilizing waste heat in the prior art due to discontinuous and different grades of waste heat, greatly improving the collection efficiency and collection upper limit of waste heat recovery, reducing energy waste and reducing the cost of industrial production through the reuse of waste heat.

[0049] Continue reading Figure 1 In an optional embodiment of the utility model, the low-temperature circulation pipeline 100 further includes a first storage tank 130, which is disposed between the low-temperature heat collection module 110 and the low-temperature utilization module 120 and communicated with the low-temperature heat collection module 110 and the low-temperature utilization module 120, and the first storage tank 130 is used to store low-concentration inorganic salt hydrate slurry. The high-temperature circulation pipeline 200 further includes a second storage tank 230, which is disposed between the high-temperature heat collection module 210 and the high-temperature utilization module 220 and communicated with the high-temperature heat collection module 210 and the high-temperature utilization module 220, and the second storage tank 230 is used to store high-concentration inorganic salt hydrate slurry.

[0050] It can be understood that the content of low-concentration inorganic salt hydrate slurry stored in the low-temperature circulation pipeline 100 can be increased by the first storage tank 130, that is, the upper limit of thermal energy storage in the low-temperature circulation pipeline 100 is increased, which is beneficial to provide a stable and lasting heat source for the heat-using end 300. Similarly, the content of high-concentration inorganic salt hydrate slurry stored in the high-temperature circulation pipeline 200 can be increased by the second storage tank 230, that is, the upper limit of thermal energy storage in the high-temperature circulation pipeline 200 is increased, which is beneficial to provide a stable and lasting heat source for the heat-using end 300.

[0051] Continue reading Figure 1 In an optional embodiment of the utility model, the first storage tank 130 includes a first cavity 131 and a second cavity 132 which are arranged at intervals, one end of the first cavity 131 is connected to the inlet end of the low-temperature solar collection module 110, and the other end of the first cavity 131 is connected to the outlet end of the low-temperature utilization module 120; one end of the second cavity 132 is connected to the outlet end of the low-temperature solar collection module 110, and the other end of the second cavity 132 is connected to the inlet end of the low-temperature utilization module 120.

[0052] It can be understood that by setting the first cavity 131 and the second cavity 132 in the first storage tank 130, the low-concentration inorganic salt hydrate slurry after releasing heat energy between the inlet end of the low-temperature solar collection module 110 and the outlet end of the low-temperature utilization module 120 and the low-concentration inorganic salt hydrate slurry after absorbing heat energy between the outlet end of the low-temperature solar collection module 110 and the inlet end of the low-temperature utilization module 120 can be stored separately, so as to avoid heat energy conversion between the low-concentration inorganic salt hydrate slurry after releasing heat energy and the low-concentration inorganic salt hydrate slurry after absorbing heat energy.

[0053] Continue reading Figure 1 In an optional embodiment of the utility model, the second storage tank 230 includes a third cavity 231 and a fourth cavity 232 arranged at intervals, one end of the third cavity 231 is connected to the inlet end of the high-temperature solar collection module 210, and the other end of the third cavity 231 is connected to the outlet end of the high-temperature utilization module 220; one end of the fourth cavity 232 is connected to the outlet end of the high-temperature solar collection module 210, and the other end of the fourth cavity 232 is connected to the inlet end of the high-temperature utilization module 220.

[0054] It can be understood that by setting the third cavity 231 and the fourth cavity 232 in the second storage tank 230, the high-concentration inorganic salt hydrate slurry after releasing heat energy between the inlet end of the high-temperature thermal collection module 210 and the outlet end of the high-temperature utilization module 220 and the high-concentration inorganic salt hydrate slurry after absorbing heat energy between the outlet end of the high-temperature thermal collection module 210 and the inlet end of the high-temperature utilization module 220 can be stored separately, so as to avoid heat energy conversion between the high-concentration inorganic salt hydrate slurry after releasing heat energy and the high-concentration inorganic salt hydrate slurry after absorbing heat energy.

[0055] Continue reading Figure 1 In an optional embodiment of the utility model, it also includes a low-temperature slurry pump 140 and a low-temperature solution pump 150. The low-temperature slurry pump 140 is arranged between the outlet end of the first cavity 131 and the inlet end of the low-temperature solar collector module 110, and is used to pump the low-concentration inorganic salt hydrate slurry stored in the first cavity 131 to the low-temperature solar collector module 110; the low-temperature solution pump 150 is arranged between the outlet end of the second cavity 132 and the inlet end of the low-temperature utilization module 120, and is used to pump the low-concentration inorganic salt hydrate slurry stored in the second cavity 132 to the low-temperature utilization module 120.

[0056] It can be understood that the low-temperature slurry pump 140 and the low-temperature solution pump 150 can provide power for the flow of the low-concentration inorganic salt hydrate slurry in the low-temperature circulation pipeline 100. It should be noted that since the low-concentration inorganic salt hydrate slurry will undergo phase change after releasing and absorbing heat, the low-concentration inorganic salt hydrate slurry in different states is pumped by the low-temperature slurry pump 140 and the low-temperature solution pump 150 respectively.

[0057] Continue reading Figure 1 In an optional embodiment of the utility model, a high-temperature slurry pump 240 and a high-temperature solution pump 250 are also included. The high-temperature slurry pump 240 is arranged between the outlet end of the third cavity 231 and the inlet end of the high-temperature solar collector module 210, and is used to pump the high-concentration inorganic salt hydrate slurry stored in the third cavity 231 to the high-temperature solar collector module 210; the high-temperature solution pump 250 is arranged between the outlet end of the fourth cavity 232 and the inlet end of the high-temperature utilization module 220, and is used to pump the high-concentration inorganic salt hydrate slurry stored in the fourth cavity 232 to the high-temperature utilization module 220.

[0058] It can be understood that the high-temperature slurry pump 240 and the high-temperature solution pump 250 can provide power for the flow of the high-concentration inorganic salt hydrate slurry in the high-temperature circulation pipeline 200. It should be noted that since the high-concentration inorganic salt hydrate slurry will undergo phase change after releasing and absorbing heat, the high-concentration inorganic salt hydrate slurry in different states is pumped by the high-temperature slurry pump 240 and the high-temperature solution pump 250 respectively.

[0059] Continue reading Figure 1 In an optional embodiment of the utility model, the waste heat recovery system also includes a heat pipe 400, the inlet end of the heat pipe 400 is connected to the external heat source 500, and the outlet end of the heat pipe 400 is connected to the heat end 300, and the external heat source 500 is used to provide a heat conduction medium to the heat pipe 400; the low-temperature utilization module 120 and the high-temperature utilization module 220 are both arranged in the heat pipe 400, and the high-temperature utilization module 220 is arranged on the side of the low-temperature utilization module 120 away from the inlet end of the heat pipe 400. It can be understood that through the heat pipe 400, a medium can be provided for heat conduction between the low-temperature utilization module 120 and the high-temperature utilization module 220 and the heat end 300, so that the low-temperature utilization module 120 and the high-temperature utilization module 220 can transfer heat to the heat end 300.

[0060] In addition, by arranging the high-temperature utilization module 220 on the side of the low-temperature utilization module 120 away from the inlet end of the heat pipe 400, the heat transfer medium heated by the low-temperature utilization module 120 can be heated again by the high-temperature utilization module 220, thereby improving the efficiency of heat energy utilization. When the heat end 300 requires high-temperature thermal energy, the problem of wasting this part of the thermal energy due to the low heating upper limit of the low-temperature utilization module 120 can be avoided.

[0061] Continue reading Figure 1 In an optional embodiment of the utility model, the heat end 300 includes a high-temperature heat end 310 and a medium-temperature heat end 320. The high-temperature heat end 310 is connected to the outlet end of the heat pipeline 400, and the medium-temperature heat end 320 is connected in parallel with the high-temperature heat end 310 and is arranged between the low-temperature utilization module 120 and the high-temperature utilization module 220.

[0062] It is understandable that the high-temperature heat end 310 corresponds to the high-temperature heat demand, and the medium-temperature heat end 320 corresponds to the medium-temperature heat demand. In this way, the heat ends 300 with different temperature requirements can be heated in a targeted manner to form a heating gradient and improve the utilization efficiency of thermal energy. In an optional embodiment of the utility model, a plurality of heat ends 300 with different temperature requirements can be connected in series in the heat pipe 400 between the low-temperature utilization module 120 and the high-temperature utilization module 220 to enrich the heating gradient and achieve precise heating, which can greatly improve the utilization efficiency of the waste heat recovery system for thermal energy.

[0063] Continue reading Figure 1 In an optional embodiment of the utility model, the external heat source 500 includes an external low-temperature heat source 510 and an external medium-temperature heat source 520. The external low-temperature heat source 510 is connected to the inlet end of the heat pipeline 400, and the external medium-temperature heat source 520 is connected in parallel with the external low-temperature heat source 510 and is arranged between the medium-temperature heat end 320 and the high-temperature utilization module 220.

[0064] It can be understood that by supplying heat transfer media of different temperatures from the external low-temperature heat source 510 and the external medium-temperature heat source 520 to the heat pipe 400, respectively, the problem of diversion of the heat transfer medium in the heat pipe 400 by the medium-temperature heat end 320 can be compensated, and the flow of the heat transfer medium transmitted to the high-temperature heat end 310 can be guaranteed, and the heat demand of the high-temperature heat end 310 can be guaranteed. When the waste heat recovery system simultaneously supplies heat to the high-temperature heat end 310 and the medium-temperature heat end 320, the heating capacity of the waste heat recovery system can be guaranteed, thereby improving the working capacity and versatility of the waste heat recovery system.

[0065] Continue reading Figure 1In an optional embodiment of the utility model, the heat pipeline 400 also includes a first regulating valve 410, a second regulating valve 420 and a third regulating valve 430. The first regulating valve 410 is arranged between the medium-temperature hot end 320 and the low-temperature utilization module 120. The first regulating valve 410 is used to control the flow rate of the heat transfer medium flowing to the medium-temperature hot end 320. In this way, the accuracy of regulating the heat demand of the medium-temperature hot end 320 can be improved.

[0066] The second regulating valve 420 is disposed between the low temperature utilization module 120 and the high temperature utilization module 220 and is used to adjust the flow rate of the heat transfer medium flowing from the low temperature utilization module 120 to the high temperature utilization module 220 to improve the accuracy of regulating the heat demand of the high temperature heat end 310.

[0067] The third regulating valve 430 is arranged between the external medium-temperature heat source 520 and the second regulating valve 420, and is used to adjust the flow rate of the heat transfer medium flowing from the external medium-temperature heat source 520 to the high-temperature utilization module 220, which can further improve the accuracy of regulating the heat demand of the high-temperature heat end 310.

[0068] Continue reading Figure 1 In an optional embodiment of the utility model, the waste heat recovery system further includes a regulating device 600, one end of which is in communication with the first storage tank 130, and the other end of which is in communication with the second storage tank 230. The regulating device 600 is used to adjust the concentration of the low-concentration inorganic salt hydrate slurry in the first storage tank 130 and the high-concentration inorganic salt hydrate slurry in the second storage tank 230. It can be understood that the low-concentration inorganic salt hydrate slurry stored in the first storage tank 130 and the high-concentration inorganic salt hydrate slurry in the second storage tank 230 can be transported to the regulating device 600 through a pipeline. After the concentration of the low-concentration inorganic salt hydrate slurry and the high-concentration inorganic salt hydrate slurry is adjusted by the regulating device 600, they can be transported in reverse to the first storage tank 130 and the second storage tank 230, respectively, so as to adjust the concentration and saturation temperature of the low-concentration inorganic salt hydrate slurry and the high-concentration inorganic salt hydrate slurry.

[0069] In addition, the low-concentration inorganic salt hydrate slurry in the first storage tank 130 can be used as one of the raw materials for adjusting the high-concentration inorganic salt hydrate slurry in the second storage tank 230, and the high-concentration inorganic salt hydrate slurry in the second storage tank 230 can also be used as one of the raw materials for adjusting the low-concentration inorganic salt hydrate slurry in the first storage tank 130. For example, when the use demand of one of the low-temperature circulation pipeline 100 and the high-temperature circulation pipeline 200 is reduced, the inorganic salt hydrate slurry in the one with low demand can be flexibly converted into the inorganic salt hydrate slurry of the concentration required by the one with high demand. This can improve the flexibility of the waste heat recovery system in adjusting the concentration of the inorganic salt hydrate slurry and reduce the use cost of the inorganic salt hydrate slurry.

[0070] In an optional embodiment of the utility model, a third storage tank and a fourth storage tube may also be included. The third storage tank can replace the second cavity 132 of the aforementioned first storage tank 130, and the fourth cavity 232 can replace the fourth cavity 232 of the aforementioned second storage tank 230. In other words, the aforementioned first storage tank 130 and the second storage tank 230 can be divided into four storage tubes, which are respectively arranged on the low-temperature circulation pipeline 100 and the high-temperature circulation pipeline 200. For the specific connection relationship, please refer to the adaptive setting mentioned above. It can be understood that such a setting can reduce the difficulty of making the first storage tank 130 and the second storage tank 230, and simplify the difficulty of assembling the waste heat recovery system.

[0071] Figure 2 It is a schematic diagram of the pipeline connection of the low temperature utilization module provided in the embodiment of the utility model.

[0072] See also Figure 1 and Figure 2 The low-temperature utilization module 120 includes a low-temperature utilization circulation pipeline 121, and the low-temperature utilization circulation pipeline 121 includes a low-temperature evaporator 122, a low-temperature compressor 123 and a low-temperature condenser 124 connected in sequence. The low-temperature medium in the low-temperature utilization circulation pipeline 121 is suitable for heat exchange with a low-concentration inorganic salt hydrate slurry through the low-temperature evaporator 122; the low-temperature compressor 123 is used to compress the low-temperature medium; and the low-temperature condenser 124 is used to transfer the heat of the low-temperature medium to the heat-using end 300.

[0073] It can be understood that the heat of the low-concentration inorganic salt hydrate slurry in the low-temperature utilization circulation pipeline 121 is absorbed by the low-temperature evaporator 122, and the low-temperature medium after absorbing the heat is compressed by the low-temperature compressor 123, and the heat in the low-temperature medium is further transferred to the heat transfer medium from the external low-temperature heat source 510 through the low-temperature condenser 124. This can improve the quality of thermal energy. In other words, it can increase the energy density of the heat transfer medium and increase the thermal energy contained in the heat transfer medium under the same unit volume or mass.

[0074] Figure 3 It is a schematic diagram of the pipeline connection of the high temperature utilization module provided in the embodiment of the utility model.

[0075] See also Figure 1 and Figure 3The high temperature utilization module 220 includes a high temperature utilization circulation pipeline 221, and the high temperature utilization circulation pipeline 221 includes a high temperature evaporator 222, a high temperature compressor 223 and a high temperature condenser 224 connected in sequence. The high temperature medium in the high temperature utilization circulation pipeline 221 is suitable for heat exchange with high-concentration inorganic salt hydrate slurry through the high temperature evaporator 222; the high temperature compressor 223 is used to compress the high temperature medium; the high temperature condenser 224 is used to transfer the heat of the high temperature medium to the heat-using end 300.

[0076] It can be understood that the heat of the high-concentration inorganic salt hydrate slurry in the high-temperature utilization circulation pipeline 221 is absorbed by the high-temperature evaporator 222, and the high-temperature medium after absorbing the heat is compressed by the high-temperature compressor 223, and the heat in the high-temperature medium is further transferred to the heat transfer medium from the external high-temperature heat source through the high-temperature condenser 224. This can improve the quality of thermal energy. In other words, it can increase the energy density of the heat transfer medium and increase the thermal energy contained in the heat transfer medium under the same unit volume or mass.

[0077] Figure 4 It is a schematic diagram of the pipeline connection of the low-temperature heat collection module provided in the embodiment of the utility model.

[0078] See also Figure 1 and Figure 4 In an optional embodiment of the utility model, the low-temperature heat collection module 110 includes at least one low-temperature heat collection pipeline 111, the inlet end of the low-temperature heat collection pipeline 111 is connected to the outlet end of the low-temperature utilization module 120, and the outlet end of the low-temperature heat collection pipeline 111 is connected to the inlet end of the low-temperature utilization module 120; a low-temperature waste heat recovery heat exchanger is provided on the low-temperature heat collection pipeline 111, and the low-temperature waste heat recovery heat exchanger is used to collect the waste heat generated by the device into the low-temperature waste heat recovery medium in the low-temperature heat collection pipeline 111; when multiple low-temperature heat collection pipelines 111 are provided, multiple low-temperature heat collection pipelines 111 are connected in parallel, and the inlet ends of all low-temperature heat collection pipelines 111 can be connected to the outlet end of the low-temperature utilization module 120 through a main pipeline, and the outlet ends of all low-temperature heat collection pipelines 111 can be connected to the inlet end of the low-temperature utilization module 120 through a main pipeline.

[0079] Figure 5 It is a schematic diagram of the pipeline connection of the high-temperature heat collection module provided in the embodiment of the utility model.

[0080] See also Figure 1 and Figure 5In an optional embodiment of the utility model, the high-temperature heat collection module 210 includes at least one high-temperature heat collection pipeline 211, the inlet end of the high-temperature heat collection pipeline 211 is connected to the outlet end of the high-temperature utilization module 220, and the outlet end of the high-temperature heat collection pipeline 211 is connected to the inlet end of the high-temperature utilization module 220; a high-temperature waste heat recovery heat exchanger is provided on the high-temperature heat collection pipeline 211, and the high-temperature waste heat recovery heat exchanger is used to collect the waste heat generated by the device into the high-temperature waste heat recovery medium in the high-temperature heat collection pipeline 211; when multiple high-temperature heat collection pipelines 211 are provided, multiple high-temperature heat collection pipelines 211 are connected in parallel, and the inlet ends of all high-temperature heat collection pipelines 211 can be connected to the outlet end of the high-temperature utilization module 220 through a main pipeline, and the outlet ends of all high-temperature heat collection pipelines 211 can be connected to the inlet end of the high-temperature utilization module 220 through a main pipeline.

[0081] It should be noted that the technical solutions in various embodiments of the present utility model can be combined with each other, but the basis for the mutual combination is that it can be implemented by ordinary technicians in the field; when the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist, that is, it does not belong to the protection scope of the present utility model.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A waste heat recovery system, characterized in that: include: A heat source module, including a low-temperature heat source and a high-temperature heat source; A low-temperature circulation pipeline (100) is sequentially connected to a low-temperature heat collection module (110) and a low-temperature utilization module (120), wherein the low-temperature heat collection module (110) is used to transfer heat from the low-temperature heat source to the low-concentration inorganic salt hydrate slurry in the low-temperature circulation pipeline (100); and the low-temperature utilization module (120) is used to transfer heat from the low-concentration inorganic salt hydrate slurry to a heat-using end (300); The high-temperature circulation pipeline (200) is connected in sequence to a high-temperature heat collection module (210) and a high-temperature utilization module (220), wherein the high-temperature heat collection module (210) is used to transfer the heat of the high-temperature heat source to the high-concentration inorganic salt hydrate slurry in the high-temperature circulation pipeline (200); and the high-temperature utilization module (220) is used to transfer the heat of the high-concentration inorganic salt hydrate slurry to the heat-using end (300).

2. The waste heat recovery system according to claim 1, characterized in that: The low-temperature circulation pipeline (100) further comprises a first storage tank (130), wherein the first storage tank (130) is disposed between the low-temperature heat collection module (110) and the low-temperature utilization module (120), and is in communication with the low-temperature heat collection module (110) and the low-temperature utilization module (120), and the first storage tank (130) is used to store the low-concentration inorganic salt hydrate slurry; The high-temperature circulation pipeline (200) also includes a second storage tank (230), which is arranged between the high-temperature heat collection module (210) and the high-temperature utilization module (220) and is connected to the high-temperature heat collection module (210) and the high-temperature utilization module (220). The second storage tank (230) is used to store the high-concentration inorganic salt hydrate slurry.

3. The waste heat recovery system according to claim 2, characterized in that: The first storage tank (130) comprises a first cavity (131) and a second cavity (132) which are spaced apart from each other; One end of the first cavity (131) is connected to the inlet end of the low-temperature heat collection module (110), and the other end is connected to the outlet end of the low-temperature utilization module (120); One end of the second cavity (132) is connected to the outlet end of the low-temperature heat collection module (110), and the other end is connected to the inlet end of the low-temperature utilization module (120).

4. The waste heat recovery system according to claim 2, characterized in that: The second storage tank (230) comprises a third cavity (231) and a fourth cavity (232) which are arranged at intervals; One end of the third cavity (231) is in communication with the inlet end of the high-temperature heat collection module (210), and the other end is in communication with the outlet end of the high-temperature utilization module (220); One end of the fourth cavity (232) is in communication with the outlet end of the high-temperature heat collection module (210), and the other end is in communication with the inlet end of the high-temperature utilization module (220).

5. The waste heat recovery system according to claim 2, characterized in that: The invention also comprises a regulating device (600), one end of which is connected to the first storage tank (130), and the other end of which is connected to the second storage tank (230), and the regulating device (600) is used to adjust the concentration of the low-concentration inorganic salt hydrate slurry in the first storage tank (130) and the high-concentration inorganic salt hydrate slurry in the second storage tank (230).

6. The waste heat recovery system according to claim 1, characterized in that: It also includes a heat-using pipeline (400), wherein the inlet end of the heat-using pipeline (400) is in communication with an external heat source (500), and the outlet end of the heat-using pipeline (400) is in communication with the heat-using end (300); The low-temperature utilization module (120) and the high-temperature utilization module (220) are both arranged through the heat utilization pipeline (400), and the high-temperature utilization module (220) is arranged on a side of the low-temperature utilization module (120) away from an inlet end of the heat utilization pipeline (400).

7. The waste heat recovery system according to claim 6, characterized in that: The heat-using end (300) comprises a high-temperature heat-using end (310) and a medium-temperature heat-using end (320); the high-temperature heat-using end (310) is connected to the outlet end of the heat-using pipeline (400); the medium-temperature heat-using end (320) is connected in parallel with the high-temperature heat-using end (310) and is arranged between the low-temperature utilization module (120) and the high-temperature utilization module (220).

8. The waste heat recovery system according to claim 7, characterized in that: The external heat source (500) includes an external low-temperature heat source (510) and an external medium-temperature heat source (520). The external low-temperature heat source (510) is connected to the inlet end of the heat pipeline (400). The external medium-temperature heat source (520) is connected in parallel with the external low-temperature heat source (510) and is arranged between the medium-temperature heat end (320) and the high-temperature utilization module (220).

9. The waste heat recovery system according to any one of claims 1 to 8, characterized in that: The low temperature utilization module (120) comprises a low temperature utilization circulation pipeline (121), wherein the low temperature utilization circulation pipeline (121) comprises a low temperature evaporator (122), a low temperature compressor (123) and a low temperature condenser (124) which are connected in sequence, and the low temperature medium in the low temperature utilization circulation pipeline (121) is suitable for heat exchange with the low concentration inorganic salt hydrate slurry through the low temperature evaporator (122); The low-temperature compressor (123) is used to compress the low-temperature medium; the low-temperature condenser (124) is used to transfer the heat of the low-temperature medium to the heat-using end (300).

10. The waste heat recovery system according to any one of claims 1 to 8, characterized in that: The high temperature utilization module (220) comprises a high temperature utilization circulation pipeline (221), wherein the high temperature utilization circulation pipeline (221) comprises a high temperature evaporator (222), a high temperature compressor (223) and a high temperature condenser (224) which are connected in sequence, and the high temperature medium in the high temperature utilization circulation pipeline (221) is suitable for heat exchange with the low concentration inorganic salt hydrate slurry through the high temperature evaporator (222); the high temperature compressor (223) is used to compress the high temperature medium; and the high temperature condenser (224) is used to transfer the heat of the high temperature medium to the heat-using end (300).

11. The waste heat recovery system according to any one of claims 1 to 8, characterized in that: The low-temperature heat collection module (110) comprises at least one low-temperature heat collection pipeline (111), the inlet end of the low-temperature heat collection pipeline (111) is connected to the outlet end of the low-temperature utilization module (120), and the outlet end of the low-temperature heat collection pipeline (111) is connected to the inlet end of the low-temperature utilization module (120); The high-temperature heat collection module (210) comprises at least one high-temperature heat collection pipeline (211), the inlet end of the high-temperature heat collection pipeline (211) is connected to the outlet end of the high-temperature utilization module (220), and the outlet end of the high-temperature heat collection pipeline (211) is connected to the inlet end of the high-temperature utilization module (220).

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