CN103398627A - Multi-source fluid waste heat recovery and comprehensive utilization system - Google Patents
Multi-source fluid waste heat recovery and comprehensive utilization system Download PDFInfo
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Abstract
本发明公开了一种多源流体余热回收与综合利用系统,包括高温热交换器、热源端热交换器组、热源端小循环系统、直接热交换装置、热能存储系统、使用端热交换器组、余热利用系统、热泵系统和智能控制系统,所述的智能控制系统通过控制电缆分别与高温热交换器、热源端热交换器组、热源端小循环系统、直接热交换装置、热能存储系统、使用端热交换器组和热泵系统连接。本发明设置了两个独立的内部循环:可以在保证热泵热源端温度的同时防止水中的污垢和杂质,可以对循环水进行单独的物理和化学处理,保证了热源端的水质。另外,内循环隔离了热泵和不同成分的液体相互接触,减少清洗和维修次数,从而确保热泵运行的稳定性和可靠性。
The invention discloses a multi-source fluid waste heat recovery and comprehensive utilization system, comprising a high-temperature heat exchanger, a heat source end heat exchanger group, a heat source end small circulation system, a direct heat exchange device, a thermal energy storage system, and a use end heat exchanger group , a waste heat utilization system, a heat pump system, and an intelligent control system, wherein the intelligent control system communicates with the high-temperature heat exchanger, the heat exchanger group at the heat source end, the small circulation system at the heat source end, the direct heat exchange device, the thermal energy storage system, Use side heat exchanger bank and heat pump system connection. The invention sets two independent internal circulations: it can prevent dirt and impurities in the water while ensuring the temperature of the heat source end of the heat pump, and can carry out separate physical and chemical treatment on the circulating water to ensure the water quality at the heat source end. In addition, the internal circulation isolates the heat pump from contact with liquids of different components, reducing the number of cleaning and maintenance, thereby ensuring the stability and reliability of the heat pump operation.
Description
技术领域technical field
本发明涉及工业企业生产过程中余热的多级提取与综合利用,特别是一种多源流体余热回收与综合利用系统。The invention relates to multi-stage extraction and comprehensive utilization of waste heat in the production process of industrial enterprises, in particular to a multi-source fluid waste heat recovery and comprehensive utilization system.
实现多种热源并流、梯级提取与利用及智能工作模式识别与过程控制,提高整个余热回收系统的综合效率和工作稳定性,实现热能的低排放。Realize parallel flow of multiple heat sources, cascade extraction and utilization, intelligent working mode recognition and process control, improve the overall efficiency and working stability of the entire waste heat recovery system, and achieve low heat emission.
背景技术Background technique
企业用能很大一部分被以废弃余热的方式浪费掉了,同时为了维持介质的温度还要采取各种方式进行冷却又二次消耗了能源。废弃余热的存在方式有烟气、冷却油、冷却水、中水及污水等,怎样对其中的热能进行回收,尤其是同时将多种废弃热源中的热能高效地回收并形成稳定的热源已经成为节能减排的重要发展方向,解决多种废弃热能并流回收等所遇到的一系列科学和技术问题已成为重要理论和技术课题。A large part of the energy used by enterprises is wasted by waste heat. At the same time, in order to maintain the temperature of the medium, various methods are used for cooling, which consumes energy again. Waste heat exists in flue gas, cooling oil, cooling water, reclaimed water and sewage, etc. How to recover the heat energy, especially how to efficiently recover the heat energy from various waste heat sources at the same time and form a stable heat source has become a As an important development direction of energy saving and emission reduction, solving a series of scientific and technical problems encountered in co-current recovery of various waste heat energies has become an important theoretical and technical topic.
企业用能很大一部分被以废弃余热的方式浪费掉了,同时为了维持介质的温度还要采取各种方式进行冷却又二次消耗了能源。废弃余热的存在方式有烟气、冷却油、冷却水、中水及污水等。现有的余热回收装置仅针对某一种热源进行热能回收,这样的系统存在如下几个问题:A large part of the energy used by enterprises is wasted by waste heat. At the same time, in order to maintain the temperature of the medium, various methods are used for cooling, which consumes energy again. Waste heat exists in flue gas, cooling oil, cooling water, reclaimed water and sewage. The existing waste heat recovery device only recovers heat energy for a certain heat source, and such a system has the following problems:
1、受生产的实际情况所限,利用这样的余热回收系统难以得到稳定的热能供应。1. Limited by the actual situation of production, it is difficult to obtain a stable heat supply by using such a waste heat recovery system.
2、由于热泵机组输入端的温度波动较大,使其难以发挥最大工作效率,并影响使用寿命。2. Due to the large temperature fluctuation at the input end of the heat pump unit, it is difficult to exert the maximum working efficiency and affect the service life.
3、难以在系统中进行主动的控制和调节,系统换热比无法达到最佳。3. It is difficult to actively control and adjust in the system, and the heat transfer ratio of the system cannot be optimal.
发明内容Contents of the invention
为解决现有技术存在的上述问题,本发明要设计一种可以提高系统换热比、回收热源温度稳定、系统工作可靠性高的多源流体余热回收与综合利用系统。In order to solve the above-mentioned problems in the prior art, the present invention designs a multi-source fluid waste heat recovery and comprehensive utilization system that can improve the heat exchange ratio of the system, stabilize the temperature of the recovered heat source, and have high system reliability.
为了实现上述目的,本发明的技术方案如下:一种多源流体余热回收与综合利用系统,包括高温热交换器、热源端热交换器组、热源端小循环系统、直接热交换装置、热能存储系统、使用端热交换器组、余热利用系统、热泵系统和智能控制系统,所述的智能控制系统通过控制电缆分别与高温热交换器、热源端热交换器组、热源端小循环系统、直接热交换装置、热能存储系统、使用端热交换器组和热泵系统连接;In order to achieve the above object, the technical solution of the present invention is as follows: a multi-source fluid waste heat recovery and comprehensive utilization system, including a high-temperature heat exchanger, a heat exchanger group at the heat source end, a small circulation system at the heat source end, a direct heat exchange device, and a thermal energy storage system, a heat exchanger group at the use end, a waste heat utilization system, a heat pump system, and an intelligent control system. Connection of heat exchange device, thermal energy storage system, use-side heat exchanger group and heat pump system;
所述的高温热交换器的输入端与高温热源连接、其输出端经直接热交换装置与热能存储系统连接;The input end of the high-temperature heat exchanger is connected to a high-temperature heat source, and its output end is connected to a thermal energy storage system through a direct heat exchange device;
所述的热源端热交换器组包括一组具有不同结构和特性参数的热交换器,每一个热交换器均通过控制电缆连接到智能控制系统,热交换器的输入端与一个对应的非高温热源连接、其输出端与内循环系统连接;所述的内循环系统经热泵系统与热能存储系统连接;The heat source end heat exchanger group includes a group of heat exchangers with different structures and characteristic parameters, each heat exchanger is connected to the intelligent control system through a control cable, and the input end of the heat exchanger is connected to a corresponding non-high temperature The heat source is connected, and its output end is connected to the internal circulation system; the internal circulation system is connected to the thermal energy storage system through the heat pump system;
所述的使用端热交换器组包括一组具有不同结构和特性参数的热交换器,每一个热交换器均通过控制电缆连接到智能控制系统,热交换器的输入端均与热能存储系统连接、其输出端与一个对应的用热源连接;The use-end heat exchanger group includes a group of heat exchangers with different structures and characteristic parameters, each heat exchanger is connected to the intelligent control system through a control cable, and the input ends of the heat exchangers are connected to the thermal energy storage system , its output end is connected with a corresponding heat source;
所述的热能存储系统的输出端还与一个直接用热系统连接;The output end of the thermal energy storage system is also connected to a direct heating system;
所述的高温热交换器和热源端热交换器与高温热源和非高温热源共同形成多源流体换热循环系统;所述的热源端热交换器组、热源端小循环系统和热泵系统的输入端共同形成热源端内循环系统;所述的热泵系统的输出端、热能存储系统和使用端热交换器组共同形成储热循环系统;所述的使用端热交换器组和余热利用系统形成综合利用循环系统;The high-temperature heat exchanger and the heat source end heat exchanger together with the high temperature heat source and the non-high temperature heat source form a multi-source fluid heat exchange cycle system; the input of the heat source end heat exchanger group, the heat source end small circulation system and the heat pump system The internal circulation system of the heat source end is jointly formed at the heat source end; the output end of the heat pump system, the thermal energy storage system and the heat exchanger group at the use end jointly form a heat storage circulation system; the heat exchanger group at the use end and the waste heat utilization system form a comprehensive use the circulatory system;
所述的智能控制系统的智能控制算法,包括以下步骤:The intelligent control algorithm of the described intelligent control system comprises the following steps:
a、对多种热源流体进行并联提取并与热泵热源端内循环进行热交换,每路热交换的控制采用模糊控制算法,保证内循环水温的稳定性;通过控制热源流体的流量来控制热量的交换,模糊控制算法作为控制的执行层,根据热交换多少的指令确定多源流体每一路的阀门开度;a. Parallel extraction of multiple heat source fluids and heat exchange with the internal circulation of the heat source end of the heat pump. The control of each heat exchange adopts a fuzzy control algorithm to ensure the stability of the internal circulation water temperature; control the flow of heat by controlling the flow of heat source fluid Exchange, the fuzzy control algorithm is used as the execution layer of the control, and the valve opening of each channel of the multi-source fluid is determined according to the instruction of the amount of heat exchange;
b、利用神经网络识别并学习多源流体的运行规律,作为模糊控制算法的指令层级;根据对热能存储系统温度稳定的要求,同时考虑到对多源流体冷却温度的要求,结合工业生产实际情况,神经网络自适应学习并总结多源流体热源的热能变化规律,根据网络经验实时给出多源流体每一路的换热指令,模糊控制算法根据此指令控制多源流体每一路的阀门开度。b. Use the neural network to identify and learn the operation rules of multi-source fluids, as the instruction level of the fuzzy control algorithm; according to the requirements for the temperature stability of the thermal energy storage system, while considering the requirements for the cooling temperature of the multi-source fluids, combined with the actual situation of industrial production , the neural network self-adaptively learns and summarizes the thermal energy change law of multi-source fluid heat sources, and gives real-time heat exchange instructions for each channel of multi-source fluids according to network experience, and the fuzzy control algorithm controls the valve opening of each channel of multi-source fluids according to this instruction.
本发明所述的热源端热交换器组中的每一个热交换器具有与其对应热源最合适的结构和特性参数。Each heat exchanger in the group of heat exchangers at the heat source end of the present invention has the most suitable structure and characteristic parameters for its corresponding heat source.
本发明所述的使用端热交换器组中的每一个热交换器具有与其对应用热系统最合适的结构和特性参数。Each heat exchanger in the heat exchanger group at the use end of the present invention has the most suitable structure and characteristic parameters for its corresponding heat application system.
本发明的工作原理如下:根据多源流体的不同特点,采用不同的热能提取手段,热源端热交换器依流体的性质选择不同的结构和特性参数,内循环系统将多源流体与热泵系统隔离开来,提高热泵工作效率和使用的稳定性与可靠性。热能存储系统接收来自热泵热源端的出水,一方面储存热水,同时也起到调节系统整体热能储量的作用。使用端热交换器将热能存储系统中的热量传递给余热利用系统。智能控制系统调节整个系统的热量传递过程。The working principle of the present invention is as follows: according to the different characteristics of multi-source fluids, different means of heat energy extraction are adopted, the heat exchanger at the heat source end selects different structures and characteristic parameters according to the properties of the fluids, and the internal circulation system isolates the multi-source fluids from the heat pump system Open, improve heat pump efficiency and stability and reliability of use. The thermal energy storage system receives the effluent from the heat source of the heat pump. On the one hand, it stores hot water, and at the same time, it also plays a role in regulating the overall thermal energy storage of the system. The use-side heat exchanger transfers the heat in the thermal energy storage system to the waste heat utilization system. The intelligent control system regulates the heat transfer process of the whole system.
与现有技术相比,本发明具有以下有益效果:Compared with the prior art, the present invention has the following beneficial effects:
1.本发明设置了两个独立的内部循环:可以在保证热泵热源端温度的同时防止水中的污垢和杂质,可以对循环水进行单独的物理和化学处理,保证了热源端的水质。另外,内循环隔离了热泵和不同成分的液体相互接触,减少清洗和维修次数,从而确保热泵运行的稳定性和可靠性。1. The present invention sets up two independent internal circulations: it can prevent dirt and impurities in the water while ensuring the temperature of the heat source end of the heat pump, and can carry out separate physical and chemical treatment on the circulating water to ensure the water quality at the heat source end. In addition, the internal circulation isolates the heat pump from contact with liquids of different components, reducing the number of cleaning and maintenance, thereby ensuring the stability and reliability of the heat pump operation.
2.本发明设置四个子循环系统,实现各热源流体的独立热交换,保证热泵的工作可靠,热水用户用热的水质及安全。2. The present invention sets four sub-circulation systems to realize the independent heat exchange of each heat source fluid, to ensure the reliable operation of the heat pump, and the water quality and safety of hot water users.
3.本发明采用多源流体的智能换热控制:根据各个热源流体的特点和流动规律,控制其与内循环水的换热时间和换热量,从而保证被冷却装置或系统在得到充分的冷却的基础上,使各种热源能够互补,实现换热的最大化,同时保证热源端内循环水温度基本恒定,提高热泵的工作效率和长久性;3. The present invention adopts the intelligent heat exchange control of multi-source fluids: according to the characteristics and flow rules of each heat source fluid, the heat exchange time and heat exchange amount between it and the internal circulating water are controlled, so as to ensure that the cooled device or system is fully cooled. On the basis of cooling, various heat sources can complement each other to maximize heat exchange, and at the same time ensure that the temperature of the circulating water in the heat source end is basically constant, improving the working efficiency and durability of the heat pump;
4.本发明由四个子循环系统串联而成:分别为多源流体换热循环、热源端内循环、储热循环及综合利用循环,实现各热源流体的独立热交换,保证热泵的工作可靠,热水用户用热的水质及安全;4. The present invention is composed of four sub-circulation systems connected in series: multi-source fluid heat exchange cycle, heat source end internal cycle, heat storage cycle and comprehensive utilization cycle to realize independent heat exchange of each heat source fluid and ensure reliable operation of the heat pump. Hot water quality and safety for hot water users;
5.本发明对多种热源流体进行并联提取与热泵热源端内循环进行热交换,每路热交换的控制采用模糊控制算法,保证内循环水温的稳定性;5. The present invention performs parallel extraction of various heat source fluids and conducts heat exchange with the internal circulation of the heat source end of the heat pump. The control of each heat exchange adopts a fuzzy control algorithm to ensure the stability of the internal circulation water temperature;
6.本发明的多方式梯阶提取方案及不同的用热特点实现优化梯阶提取与梯阶利用(油罐车清洗、喷期间加热、铸造型砂预热等)。对不同的热源采用不同的换热方式,如高温热源和非高温热源,高温热源直接取热,非高温热源通过热泵取热。6. The multi-mode step extraction scheme and different heat characteristics of the present invention realize optimized step extraction and step utilization (tank car cleaning, heating during spraying, casting sand preheating, etc.). Different heat exchange methods are adopted for different heat sources, such as high-temperature heat source and non-high-temperature heat source, high-temperature heat source directly obtains heat, and non-high-temperature heat source obtains heat through a heat pump.
附图说明Description of drawings
本发明仅有附图1张,其中:The present invention only has 1 accompanying drawing, wherein:
图1是本发明的结构示意图。Fig. 1 is a schematic structural view of the present invention.
图中:1、多源流体热源,2、高温热交换器,3、热源端小循环系统,4、直接热交换装置,5、热能存储系统,6、使用端热交换器组,7、余热利用系统,8、热泵系统,9、智能控制系统,10、热源端热交换器组。In the figure: 1. Multi-source fluid heat source, 2. High temperature heat exchanger, 3. Small circulation system at the heat source end, 4. Direct heat exchange device, 5. Thermal energy storage system, 6. Heat exchanger group at the use end, 7. Waste heat Utilization system, 8. Heat pump system, 9. Intelligent control system, 10. Heat exchanger group at the heat source end.
具体实施方式Detailed ways
下面结合附图对本发明作进一步的说明。如图1所示,一种多源流体余热回收与综合利用系统,包括高温热交换器2、热源端热交换器组10、热源端小循环系统3、直接热交换装置4、热能存储系统5、使用端热交换器组6、余热利用系统7、热泵系统8和智能控制系统9,所述的智能控制系统9通过控制电缆分别与高温热交换器2、热源端热交换器组10、热源端小循环系统3、直接热交换装置4、热能存储系统5、使用端热交换器组6和热泵系统8连接;The present invention will be further described below in conjunction with the accompanying drawings. As shown in Figure 1, a multi-source fluid waste heat recovery and comprehensive utilization system includes a high-temperature heat exchanger 2, a
所述的高温热交换器2的输入端与高温热源连接、其输出端经直接热交换装置4与热能存储系统5连接;The input end of the high-temperature heat exchanger 2 is connected to a high-temperature heat source, and its output end is connected to a thermal
所述的热源端热交换器组10包括一组具有不同结构和特性参数的热交换器,每一个热交换器均通过控制电缆连接到智能控制系统9,热交换器的输入端与一个对应的非高温热源连接、其输出端与内循环系统连接;所述的内循环系统经热泵系统8与热能存储系统5连接;The heat source end
所述的使用端热交换器组6包括一组具有不同结构和特性参数的热交换器,每一个热交换器均通过控制电缆连接到智能控制系统9,热交换器的输入端均与热能存储系统5连接、其输出端与一个对应的用热源连接;The
所述的热能存储系统5的输出端还与一个直接用热系统连接;The output end of the thermal
所述的高温热交换器2和热源端热交换器与高温热源和非高温热源共同形成多源流体换热循环系统;所述的热源端热交换器组10、热源端小循环系统3和热泵系统8的输入端共同形成热源端内循环系统;所述的热泵系统8的输出端、热能存储系统5和使用端热交换器组6共同形成储热循环系统;所述的使用端热交换器组6和余热利用系统7形成综合利用循环系统;The high-temperature heat exchanger 2 and the heat source end heat exchanger together with the high temperature heat source and the non-high temperature heat source form a multi-source fluid heat exchange cycle system; the heat source end
所述的智能控制系统9的智能控制算法,包括以下步骤:The intelligent control algorithm of described intelligent control system 9 comprises the following steps:
a、对多种热源流体进行并联提取并与热泵热源端内循环进行热交换,每路热交换的控制采用模糊控制算法,保证内循环水温的稳定性;通过控制热源流体的流量来控制热量的交换,模糊控制算法作为控制的执行层,根据热交换多少的指令确定多源流体每一路的阀门开度;a. Parallel extraction of multiple heat source fluids and heat exchange with the internal circulation of the heat source end of the heat pump. The control of each heat exchange adopts a fuzzy control algorithm to ensure the stability of the internal circulation water temperature; control the flow of heat by controlling the flow of heat source fluid Exchange, the fuzzy control algorithm is used as the execution layer of the control, and the valve opening of each channel of the multi-source fluid is determined according to the instruction of the amount of heat exchange;
b、利用神经网络识别并学习多源流体的运行规律,作为模糊控制算法的指令层级;根据对热能存储系统5温度稳定的要求,同时考虑到对多源流体冷却温度的要求,结合工业生产实际情况,神经网络自适应学习并总结多源流体热源1的热能变化规律,根据网络经验实时给出多源流体每一路的换热指令,模糊控制算法根据此指令控制多源流体每一路的阀门开度。b. Use the neural network to identify and learn the operation rules of multi-source fluids, as the instruction level of the fuzzy control algorithm; according to the requirements for the temperature stability of the thermal
本发明所述的热源端热交换器组10中的每一个热交换器具有与其对应热源最合适的结构和特性参数。Each heat exchanger in the heat source end
本发明所述的使用端热交换器组6中的每一个热交换器具有与其对应用热系统最合适的结构和特性参数。Each heat exchanger in the
本发明的工作原理如下:根据多源流体的不同特点,采用不同的热能提取手段,热源端热交换器依流体的性质选择不同的结构和特性参数,内循环系统将多源流体与热泵系统8隔离开来,提高热泵工作效率和使用的稳定性与可靠性。热能存储系统5接收来自热泵热源端的出水,一方面储存热水,同时也起到调节系统整体热能储量的作用。使用端热交换器将热能存储系统5中的热量传递给余热利用系统7。智能控制系统9调节整个系统的热量传递过程。The working principle of the present invention is as follows: according to the different characteristics of multi-source fluids, different heat energy extraction methods are adopted, and the heat exchanger at the heat source end selects different structures and characteristic parameters according to the properties of the fluids, and the internal circulation system combines the multi-source fluids with the
本发明从系统的角度划分,分为热源系统、多热源与热泵热源端内循环系统的热交换系统、高效热交换与热泵系统8、储热热水系统、多用途热交换系统以及热水输送系统等。中高温的烟气、高温冷却油通过热交换器和直接换热装置得到的较高温度水直接进入热能存储系统5的水箱中或将其它冷却水含热冷却水等作为洗浴用水的水源直接加入储水箱。如空气压缩机冷却水作为热源水,通过高效换热器将热换入到内循环系统;铸锻冷却水经过滤再通过热交换器将热交换到内循环系统中。中水、污水等通过立式列管换热器将热换入到内循环系统中。热泵系统8将其低品质热能提取出来并交换到热能存储系统5的水箱中。在热源水通过板式换热器之后增加内循环水系统、热泵机组、热交换流量控制阀等。智能控制系统9根据各热源水的情况控制各路换热流量热量,确保内循环水温稳定从而保证热泵热源端的进水温度稳定、提高热源端进水洁净度,从而提高热泵运行的稳定性和效率。通过高效热交换器、热泵机组提取到的热能存储到热能存储系统5的储水箱中。如同热源水侧一样根据用热水化学成分的不同采用不同的换热方式,如油罐车清洗系统的用水为强碱性水,系统中就要采用耐酸碱的泵和热交换器;用于洗浴的水为饮用标准的水可直接由储水箱供水。同时考虑到用热温度的不同采用阶梯式供热方式,提高用热的效率。From the perspective of the system, the present invention is divided into heat source system, heat exchange system of multi-heat source and internal circulation system of heat pump heat source, high-efficiency heat exchange and
系统采用基于PROFI-BUS网络的计算机控制系统,由PLC、计算机、电能表、智能供水系统、压力传感器、流量传感器、温度传感器等等构成,实现设备的自动监控与计算机管理。通过以太网与企业的能源管理系统实现无缝连接,提高管理水平。The system adopts a computer control system based on PROFI-BUS network, which is composed of PLC, computer, electric energy meter, intelligent water supply system, pressure sensor, flow sensor, temperature sensor, etc., to realize automatic monitoring and computer management of equipment. It realizes seamless connection with the energy management system of the enterprise through Ethernet and improves the management level.
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