Heating and steam-making system coupled with waste heat resources of data center

Abstract

The utility model discloses a heating and steam generating system coupled with waste heat resources of a data center, and belongs to the technical field of waste heat recovery of the data center. According to the utility model, the waste heat of the data center is collected through the waste heat recovery unit, and the heat of the waste heat is transferred to the lithium bromide heating unit through the low-temperature lithium bromide heat exchange device, so that the energy consumption of direct heating is reduced. Through the design of the multiple stages of heat exchange units, step-by-step utilization of heat is achieved, and the utilization efficiency of energy is improved. Different grades of steam are respectively stored through the high-temperature steam storage tank, the medium-low temperature steam storage tank and the hot water storage device, so that graded utilization of energy is realized; the lithium bromide heating unit provides heat energy for the multi-stage heat exchange unit, the lithium bromide heating unit utilizes waste heat, and the heat supply cost of the system is reduced. The technical problem that waste heat resources of the data center cannot be efficiently utilized in the prior art is solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to data center waste heat recovery technical field, concretely relates to a kind of heating steam production system coupled with data center waste heat resource. BACKGROUND

[0002] The energy consumption cost of traditional steam production mode is high, which not only increases the operating cost, but also increases energy consumption and environmental pressure. For example, the power consumption of a general boiler to produce one ton of steam is about 700KW. With the continuous expansion of data center construction scale, the power of single cabinet surges, and the corresponding waste heat resource increases. However, the waste heat recovery system of data center often lacks effective system integration and linkage, resulting in low waste heat recovery efficiency. The concept of multi-system integration and linkage emphasizes the interconnection between systems, but in actual application, due to the limitation of technical means, the system integration degree is not enough, and the linkage efficiency is low.

[0003] The waste heat of data center belongs to low-grade heat source, and the adaptable waste heat utilization technology is relatively lacking. A large part of the power consumption of data center is converted into waste heat. If these waste heat cannot be effectively utilized, it will cause energy waste and may promote global climate warming. Therefore, waste heat storage and recovery technology is also a challenge, because the instability of data center waste heat and the mismatch of seasonal demand need to be solved by cross-season heat storage, but the current technology is still in the initial stage in this respect. Therefore, there is an urgent need for a linkage system for efficiently utilizing data center waste heat resource to manufacture steam and provide heat, to improve energy utilization efficiency, reduce environmental pollution and bring economic value to enterprises. UTILITY MODEL CONTENT

[0004] The technical problem to be solved by the utility model is to provide a heating steam production system coupled with data center waste heat resource, which has high waste heat recovery rate, high heat exchange efficiency and strong practicability, and is convenient to popularize and use.

[0005] To solve the above technical problems, the utility model adopts the technical scheme of:

[0006] A heating steam production system coupled with data center waste heat resource, comprising a multi-stage heat exchange unit, a lithium bromide heating unit, a feedwater unit and a waste heat recovery unit.

[0007] The multi-stage heat exchange unit comprises a first heat exchange device, a second heat exchange device and a third heat exchange device connected in series through A channel, B channel and C channel. The B channel at the first heat exchange device is connected with a high-temperature steam storage tank through a first stop valve, the B channel at the second heat exchange device is connected with a medium-low temperature steam storage tank through a second stop valve, and the B channel at the third heat exchange device is connected with a heat storage water device through a third stop valve.

[0008] The lithium bromide heating unit comprises an A channel, a first channel of a low-temperature lithium bromide heat exchange device, an electric heating device, a temperature control device, a high-temperature lithium bromide storage tank, a first circulating pump and a first channel of a multi-stage heat exchange unit connected in sequence, wherein the low-temperature side outlet of the A channel is connected with the first channel of the low-temperature lithium bromide heat exchange device, and the first circulating pump is connected with the high-temperature side inlet of the first channel of the multi-stage heat exchange unit; the electric heating device heats low-temperature water into high-temperature water, and the first circulating pump drives the high-temperature water into the multi-stage heat exchange unit for heat exchange.

[0009] The feedwater unit comprises a water source, a deaerating device, a third circulating pump and a second atomizing device connected in sequence, wherein the outlet of the second atomizing device is connected with a low-temperature measuring inlet of a B channel.

[0010] The waste heat recovery unit comprises a waste heat recovery pipeline, a second channel of a low-temperature lithium bromide heat exchange device, a second circulating pump and a waste heat recovery pipeline connected in sequence, wherein the outlet of the waste heat recovery pipeline is connected with the second channel of the low-temperature lithium bromide heat exchange device, and the second circulating pump is connected with the inlet of the waste heat recovery pipeline; the second circulating pump drives low-temperature water in the waste heat recovery pipeline to the second channel of the low-temperature lithium bromide heat exchange device, and the first channel and the second channel of the lithium bromide heat exchange device perform heat exchange.

[0011] Further, the waste heat recovery unit further comprises a first three-way valve and a bidirectional stop valve; a first flow path of the first three-way valve and a first flow path of the bidirectional stop valve are connected in series between the outlet of the waste heat recovery pipeline and the second channel of the low-temperature lithium bromide heat exchange device; a second flow path outlet of the bidirectional stop valve is connected to an inlet of the multi-stage heat exchange unit through a low-grade hot water storage tank and a first atomizing device.

[0012] The second channel outlet of the high-temperature molten salt storage heat exchange device, a high-temperature side inlet of a C channel, a low-temperature side outlet of the C channel, a water storage device and a second channel inlet of the high-temperature molten salt storage heat exchange device are connected in sequence, and the first channel and the second channel of the high-temperature molten salt storage heat exchange device perform heat exchange.

[0013] Further, the waste heat recovery unit further comprises a first three-way valve and a bidirectional stop valve; a first flow path of the first three-way valve and a first flow path of the bidirectional stop valve are connected in series between the outlet of the waste heat recovery pipeline and the second channel of the low-temperature lithium bromide heat exchange device; a second flow path outlet of the bidirectional stop valve is connected to an inlet of the multi-stage heat exchange unit through a low-grade hot water storage tank and a first atomizing device.

[0014] Further, a second flow path outlet of the first three-way valve is connected to an inlet of the waste heat recovery pipeline through a regenerative device.

[0015] Further, a fourth three-way valve is arranged between the deoxidizing device and the third circulating pump, and the water source is connected to the inlet of the waste heat recovery pipeline through the fourth three-way valve, so that the water supply unit provides water supply for the waste heat recovery unit.

[0016] Compared with the prior art, the utility model has the following advantages:

[0017] The heating and steam production system coupled with the waste heat resources of the data center of the utility model collects the waste heat of the data center through the waste heat recovery unit, and transfers the heat to the lithium bromide heating unit through the low-temperature lithium bromide heat exchange device, thereby reducing the energy consumption of direct heating. Through the design of the multi-stage heat exchange unit, the step-by-step utilization of heat is realized, and the energy utilization efficiency is improved. Different grades of steam are stored in the high-temperature steam storage tank, the medium-low-temperature steam storage tank and the heat storage water device respectively, realizing the step-by-step utilization of energy; the lithium bromide heating unit and the carbon dioxide heating unit jointly provide heat energy for the multi-stage heat exchange unit, wherein the lithium bromide heating unit utilizes waste heat, and the carbon dioxide heating unit provides additional heat energy, and the two work together to improve the heating capacity of the system. The water source required for producing steam is ensured through the water supply unit, and the circulation of water is realized through the circulating pump, thereby ensuring the continuous operation of the system. The design of the whole system realizes the linkage of waste heat resources and heating and steam production, so that the waste heat of the data center can be effectively converted into useful heat energy for the heating system. The technical problem that the waste heat resources of the data center cannot be efficiently utilized in the prior art is solved.

[0018] The technical scheme of the utility model will be further described in detail below with reference to the drawings and embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a result schematic view of the embodiment of the heating and steam production system coupled with the waste heat resources of the data center of the utility model.

[0020] MARKS:

[0021] 1, waste heat recovery pipeline; 2, first three-way valve; 3, two-way stop valve; 4, low-grade hot water storage tank;

[0022] 5, heat recovery device; 6, second three-way valve; 7, low-temperature lithium bromide heat exchange device; 8, electric heating device;

[0023] 9, temperature control device; 10, high-temperature lithium bromide storage tank; 11, first circulating pump; 12, first heat exchange device; 13, second heat exchange device; 14, third heat exchange device; 15, first stop valve; 16, second stop valve; 17, third stop valve; 18, high-temperature steam storage tank; 19, medium-low-temperature steam storage tank; 20, heat storage water device; 21, first atomizing device; 22, second circulating pump; 23, third three-way valve; 24, water source;

[0024] 25. Deoxygenation device; 26. Fourth three-way valve; 27. Third circulation pump; 28. Water storage device;

[0025] 29. Second atomizing device; 30. Carbon dioxide storage device; 31. Fourth circulation pump;

[0026] 32. Carbon dioxide vaporization generator; 33. High-temperature molten salt storage heat exchange device; 34. Channel A;

[0027] 35. Channel B; 36. Channel C. Detailed Implementation

[0028] Example of a heating and steam generation system that couples waste heat resources from data centers:

[0029] like Figure 1 As shown, the heating and steam generation system coupling waste heat resources of a data center includes a multi-stage heat exchange unit, a lithium bromide heating unit, a carbon dioxide heating unit, a water supply unit, and a waste heat recovery unit. This system aims to achieve the linkage between waste heat from the data management center and the generation of steam for heating and energy supply. Specifically, the multi-stage heat exchange unit serves as the inlet to convert heat energy into heat energy for steam generation. The water supply unit provides water 24 for the steam generation. Both the lithium bromide heating unit and the carbon dioxide heating unit provide heat for the steam generation from the multi-stage heat exchange unit. The difference lies in that the lithium bromide heating unit can utilize the heat from the waste heat recovery unit for heating through a low-temperature lithium bromide heat exchanger 7, indirectly realizing the generation of steam using the heat from the waste heat recovery unit; while the carbon dioxide heating unit simply provides heat energy for the steam generation.

[0030] To generate steam, the multi-stage heat exchange unit includes a first heat exchanger 12, a second heat exchanger 13, and a third heat exchanger 14 connected in series via channels A 34, B 35, and C 36. Channel B of the first heat exchanger 12 is connected to a high-temperature steam storage tank 18 via a first shut-off valve 15; channel B of the second heat exchanger 13 is connected to a medium-low temperature steam storage tank 19 via a second shut-off valve 16; and channel B of the third heat exchanger 14 is connected to a hot water storage device 20 via a third shut-off valve 17. Specifically, the multi-stage heat exchange unit obtains heat from the lithium bromide heating unit via channel A 34 and heat from the carbon dioxide heating unit via channel C 36. This heat is used to generate steam, and steam of different grades is stored in the high-temperature steam storage tank 18, the medium-low temperature steam storage tank 19, and the hot water storage device 20, respectively. This multi-stage heat exchange unit achieves efficient energy utilization.

[0031] In order to provide heat source for the multi-stage heat exchange unit to produce steam, the lithium bromide heating unit comprises A channel 34, first channel of low-temperature lithium bromide heat exchange device 7, electric heating device 8, temperature control device 9, high-temperature lithium bromide storage tank 10, first circulating pump 11, and first channel of multi-stage heat exchange unit connected in sequence, the low-temperature side outlet of the A channel 34 is connected with the first channel of the low-temperature lithium bromide heat exchange device 7, and the first circulating pump 11 is connected with the high-temperature side inlet of the first channel of the multi-stage heat exchange unit; the electric heating device 8 heats the low-temperature water into high-temperature water, and the first circulating pump 11 drives the high-temperature water into the multi-stage heat exchange unit for heat exchange.

[0032] In order to provide water source 24 for the system, the water supply unit comprises water source 24, deoxidizing device 25, third circulating pump 27, and second atomizing device 29 connected in sequence; the outlet of the second atomizing device 29 is connected with the low-temperature measuring inlet of B channel 35. The third circulating pump 27 provides power for water circulation.

[0033] In order to realize the collection and utilization of waste heat of the data management center, the waste heat recovery unit comprises waste heat recovery pipeline 1, second channel of low-temperature lithium bromide heat exchange device 7, second circulating pump 22, and waste heat recovery pipeline 1 connected in sequence, the outlet of the waste heat recovery pipeline 1 is connected with the second channel of the low-temperature lithium bromide heat exchange device 7, and the second circulating pump 22 is connected with the inlet of the waste heat recovery pipeline 1; the second circulating pump 22 drives the low-temperature water in the waste heat recovery pipeline 1 to reach the second channel of the low-temperature lithium bromide heat exchange device 7, and the first channel and the second channel of the lithium bromide heat exchange device perform heat exchange. That is, by connecting the waste heat recovery pipeline 1 to the second channel of the lithium bromide heat exchange device, the utilization of the waste heat of the data management center is realized, the waste heat of the data management center is generally not high in temperature, so the heat source cannot be directly used to produce steam, and by the low-temperature lithium bromide heat exchange device 7, the waste heat is first used in the lithium bromide heating unit, and then used to produce steam by re-heating, thereby reducing the energy consumption of the lithium bromide heating unit, and indirectly reducing the energy consumption of the steam production.

[0034] In order to more efficiently manufacture steam, a carbon dioxide heating unit is further included, which comprises a carbon dioxide storage device 30, a fourth circulating pump 31, a carbon dioxide vaporization generator 32, and a first channel of a high-temperature molten salt storage heat exchange device 33 connected in sequence, the outlet of the carbon dioxide vaporization generator 32 is connected with the first channel of the high-temperature molten salt storage heat exchange device 33, and the first channel of the high-temperature molten salt storage heat exchange device 33 is connected with the inlet of the carbon dioxide vaporization generator 32; the outlet of a second channel of the high-temperature molten salt storage heat exchange device 33, a high-temperature side inlet of a C channel 36, a low-temperature side outlet of the C channel 36, a water storage device 28, and an inlet of a second channel of the high-temperature molten salt storage heat exchange device 33 are connected in sequence, and the first channel and the second channel of the high-temperature molten salt storage heat exchange device 33 exchange heat. Steam is manufactured by two heating units, effectively shortening the time for manufacturing steam.

[0035] Since the temperature of the heat recovered by the waste heat recovery unit is variable, when the temperature of the recovered waste heat is relatively high, the waste heat is directly connected to the multi-stage heat exchange unit without being secondarily heated by the lithium bromide heating unit, and the waste heat recovery unit further comprises a first three-way valve 2 and a bidirectional stop valve 3; a first flow path of the first three-way valve 2 and a first flow path of the bidirectional stop valve 3 are connected in series between the outlet of the waste heat recovery pipeline 1 and the second channel of the low-temperature lithium bromide heat exchange device 7; the second flow path outlet of the bidirectional stop valve 3 is connected to the inlet of the multi-stage heat exchange unit through a low-grade hot water storage tank 4 and a first atomizing device 21.

[0036] When the temperature of the heat recovered by the waste heat recovery unit is too low to be used to manufacture steam, the second flow path outlet of the first three-way valve 2 is connected to the inlet of the waste heat recovery pipeline 1 through a regenerative device 5, the waste heat is recovered by the regenerative device 5, and then used in other devices, so as to improve the utilization rate of the waste heat resource.

[0037] In order to improve the utilization rate of the feedwater unit, a fourth three-way valve 26 is arranged between the deaerating device 25 and the third circulating pump 27, the water source 24 is connected to the inlet of the waste heat recovery pipeline 1 through the fourth three-way valve 26, so as to realize that the feedwater unit supplies the water source 24 for the waste heat recovery unit; in this way, the waste heat recovery pipeline 1 does not need to be additionally configured with the water source 24. Through the fourth three-way valve 26, the utilization rate of the pipeline is improved, thereby reducing the number of pipelines arranged between devices and reducing the manufacturing cost of the system.

[0038] In order to reduce the pipeline connected to the inlet of the waste heat recovery pipeline 1, the fourth three-way valve 26 is connected to the inlet of the waste heat recovery pipeline 1, the outlet of the heat recovery device 5 is also connected to the inlet of the waste heat recovery pipeline 1, and the second circulating pump 22 is also connected to the inlet of the waste heat recovery pipeline 1; the connecting pipes at the three places can share a part of the pipeline for connecting to the inlet of the waste heat recovery pipeline 1; in the embodiment, the fourth three-way valve 26 and the second circulating pump 22 are first converged through the third three-way valve 23, and then connected to the inlet of the waste heat recovery pipeline 1 through a connecting pipe; then the converged connecting pipe and the pipeline at the outlet of the heat recovery device are converged into a connecting pipe for connecting to the inlet of the waste heat recovery pipeline 1 through the second three-way valve 6. The reason why the connecting pipes at the three places can be shared is that the possibility of simultaneous use of the three pipelines is very small, and does not affect the original flow of each connecting pipe; at the same time, the manufacturing cost of the system can be reduced through the shared pipeline, and good economy is achieved.

[0039] The technical scheme realizes effective recovery and utilization of waste heat of the data center, improves energy utilization efficiency, and reduces energy consumption for manufacturing steam.

[0040] The above is only a preferred embodiment of the present application, and does not limit the present application in any way. Any simple modification, change and equivalent structural change made according to the technical essence of the present application to the above embodiment are still within the protection scope of the technical scheme of the present application.

Claims

1. A heating and steam generation system coupled with waste heat resources from a data center, characterized in that: The multi-stage heat exchange unit, the lithium bromide heating unit, the water supply unit and the waste heat recovery unit are connected in series. The multi-stage heat exchange unit comprises a first heat exchange device (12), a second heat exchange device (13) and a third heat exchange device (14) connected in series through an A channel (34), a B channel (35) and a C channel (36); the B channel (35) at the first heat exchange device (12) is connected with a high-temperature steam storage tank (18) through a first stop valve (15), the B channel (35) at the second heat exchange device is connected with a medium-low temperature steam storage tank (19) through a second stop valve (16), and the B channel (35) at the third heat exchange device (14) is connected with a heat storage water device (20) through a third stop valve (17). The lithium bromide heating unit comprises an A channel (34), a first channel of a low-temperature lithium bromide heat exchange device (7), an electric heating device (8), a temperature control device (9), a high-temperature lithium bromide storage tank (10), a first circulating pump (11) and a first channel of the multi-stage heat exchange unit connected in series; a low-temperature side outlet of the A channel (34) is connected with the first channel of the low-temperature lithium bromide heat exchange device (7), and a high-temperature side inlet of the first channel of the multi-stage heat exchange unit is connected with the first circulating pump (11); the electric heating device (8) heats low-temperature water into high-temperature water, and the first circulating pump (11) drives the high-temperature water to enter the multi-stage heat exchange unit for heat exchange. The water supply unit comprises a water source (24), an oxygen removal device (25), a third circulating pump (27) and a second atomization device (29) connected in series; an outlet of the second atomization device (29) is connected with a low-temperature measuring inlet of the B channel (35). The waste heat recovery unit comprises a waste heat recovery pipeline (1), a second channel of the low-temperature lithium bromide heat exchange device (7), a second circulating pump (22) and the waste heat recovery pipeline (1) connected in series; an outlet of the waste heat recovery pipeline (1) is connected with the second channel of the low-temperature lithium bromide heat exchange device (7), and an inlet of the waste heat recovery pipeline (1) is connected with the second circulating pump (22); the second circulating pump (22) drives low-temperature water in the waste heat recovery pipeline (1) to reach the second channel of the low-temperature lithium bromide heat exchange device (7), and the first channel and the second channel of the lithium bromide heat exchange device perform heat exchange.

2. A heating and steam generation system coupled to a data center waste heat resource according to claim 1, wherein: The carbon dioxide heating unit comprises a carbon dioxide storage device (30), a fourth circulating pump (31), a carbon dioxide vaporization generator (32) and a first channel of a high-temperature molten salt storage heat exchange device (33) connected in series; an outlet of the carbon dioxide vaporization generator (32) is connected with the first channel of the high-temperature molten salt storage heat exchange device (33), and a first channel of the high-temperature molten salt storage heat exchange device (33) is connected with an inlet of the carbon dioxide vaporization generator (32). A second channel outlet of the high-temperature molten salt storage heat exchange device (33), a high-temperature side inlet of the C channel (36), a low-temperature side outlet of the C channel (36), a water storage device (28) and a second channel inlet of the high-temperature molten salt storage heat exchange device (33) are connected in series, and the first channel and the second channel of the high-temperature molten salt storage heat exchange device (33) perform heat exchange.

3. The heating and steam generation system coupled with the waste heat resources of a data center of claim 1, wherein: The waste heat recovery unit further comprises a first three-way valve (2) and a bidirectional stop valve (3); a first flow path of the first three-way valve (2) and a first flow path of the bidirectional stop valve (3) are connected in series between an outlet of the waste heat recovery pipeline (1) and a second passage of the low-temperature lithium bromide heat exchange device (7); a second flow path outlet of the bidirectional stop valve (3) is connected to an inlet of the multi-stage heat exchange unit through a low-grade hot water storage tank (4) and a first atomizing device (21).

4. The heating and steam generation system coupled with the waste heat resources of a data center of claim 3, wherein: A second flow path outlet of the first three-way valve (2) is connected to an inlet of the waste heat recovery pipeline (1) through a regenerative device (5).

5. The heating and steam generation system coupled with the waste heat resources of a data center of claim 1, wherein: A fourth three-way valve (26) is arranged between the deoxidizing device (25) and the third circulating pump (27), and a water source (24) is connected to an inlet of the waste heat recovery pipeline (1) through the fourth three-way valve (26) to realize that the water supply unit supplies the water source (24) to the waste heat recovery unit.

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