JPS58123072A - Heat accumulation type waste-heat recovery device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION This 'A@' is a heat storage waste heat recovery device using a compression heat pump.

In recent years, due to the desire to save energy, it has been desired to efficiently recover waste heat energy, which was previously wasted, and to utilize it effectively. However, when constructing a device that recovers and utilizes waste heat energy, the problem is that the waste heat sources mentioned above are low-level sources such as cooling water for various devices and devices. From, for example, a boiler.

Various kinds of high-level O4OI exist, such as exhaust gas from various combustion equipment such as heating furnaces, and the amount of waste heat fluctuates over time. It changes as appropriate over time, and it is necessary to take these points into consideration and create an efficient system that can meet diverse needs.

Conventionally, this type of waste heat recovery equipment is mainly designed for a single waste heat source and a single purpose, and moreover, it is designed for cases where both the waste heat source and the user side change significantly in quantity. Since no consideration has been given to this, there are still many problems in terms of efficiency.

The present invention was made in view of the above circumstances.Therefore, the present invention has been made in consideration of the above-mentioned circumstances.As a result, the compression heat pump, which is known as a device that transfers thermal energy from a low heat source to a high heat source, is used.
By skillfully combining the heat storage device of 2/) with KJI, it is possible to eliminate IIIk? Ill, regardless of the fluctuations in the amount of energy on the user side, it is possible to efficiently recover various types of energy, and to make effective use of it in response to various needs. It provides equipment hh.

Hereinafter, the present invention will be explained in detail with reference to the drawings and nine embodiments.

Figure 81 shows the main station 1jliK related thermal storage layer waste heat lIl station equipment 0
- Implementation 4P4 is indicated by t and h, and the Uchizono odorworks, which are indicated by the numeral 10, are the tm recovery cycle using a compression type and one pump, which transfer heat energy from a hot water tank to a high heat source. The compressor 11, such as a reciprocating compressor, which is in charge of the O pump O pressure collection, and the O drive engine, etc.
Machine 12 and the same heat pop expansion process as 1! It is equipped with an IA dovetail receiver 1m1113, an expansion valve 14, etc.

According to the present invention, there are two heat storage systems in the recovery cycle 10, one for low temperature and one for high temperature. 15°1@, and the first and second heat radiators 17.18 as heat exchangers for heat radiation.
The above-mentioned compressor 11. By selectively connecting to the receiving liquid 1113 and the expansion valve 14, it is configured to function as an evaporator or condenser that supports the evaporation process of the p-heat pump.

That is, a low-temperature waste heat source is led to the low-temperature side heat storage device 15 and its thermal energy is stored therein, and the low-temperature side heat storage device 15 is selectively connected to the recovery cycle 10 described above to function as an evaporator of the heat pump. '[) is configured to play a role.

First, a high-temperature waste heat source is led to the high-temperature side heat storage 16 and its thermal energy is stored, and the high-temperature side heat storage 16 is selectively connected to the above-mentioned recovery cycle 10 and is connected to the evaporator of a °C heat pump or It is constructed so that it does not function as a condenser.

Furthermore, the heat sinks 17 and 18 of the stripes 1 and 2 are selectively connected to the above-mentioned collection cycle 10, respectively, to complete the role of the top pump condenser, and provide heat energy to the user side. It is structured and designed so that it can be used effectively.

In this case, in Honjitsu 3119+1, the heat dissipation 4i11 of
17 is a pipe 11 that supplies room temperature water etc. as a direct heat utilization part.
1 is piped to the above-mentioned circular cycle 10, and is configured to be able to supply hot water and steam at nine temperature levels according to the user's request using the high thermal energy obtained in the above-mentioned circular cycle 10.

Also, the heat dissipation of jI2! ! Reference numeral 18 is incorporated into the power generation device 2G based on the Rankine cycle as an indirect heat utilization section, and is configured to act as an S generator during this cycle.

And ζ011i2o heat dissipation! The sensitive body given thermal energy in 118 drives the turbine 21, and the emitted light m1122
It is now possible to generate electricity by rotating it and supplying it to the user. In the figure, 23 is a condenser, and 24 is a water supply pump. Now, the heat storage industrial waste heat recovery apparatus having the above-mentioned nine configurations will be explained using an example of use shown in FIG. 2 and below.

First, the state shown in Fig. 2 is the most common TA situation, in which the low-temperature side heat storage device 15 is used as a low heat source and acts as a main evaporator, and the alt heat radiator 11 acts as a condenser. This shows a case in which hot water or steam at a temperature level corresponding to the user's request is supplied instead of room temperature water or the like supplied through the pipe line 1s. In this case, the temperature level can be easily controlled by making the discharge pressure and capacity of the compressor 11 variable, and by controlling the discharge pressure with a nine-pressure controller 30 installed on the outlet side.
In addition, as necessary, construction work will be carried out to help cope with load fluctuations.
It is preferable to connect the high temperature side heat storage device 16 and the outlet side of the pipe line 1B through a pipe line 31 so that hot water can be supplied from the high temperature side heat storage device 16.

In this case, if the heat storage material in the heat storage device 16 is water, it may be supplied directly; otherwise, it may be supplied via a heat exchanger or the like.

Incidentally, in the operating state shown in FIG. 2, all the illustrated on-off valves are opened, and the others are closed, so that the above-described recovery cycle 10 is configured.

In addition, Figure 3 shows the use of the high temperature side heat storage device 16 as a low heat source.
From the operating state shown in Figure 2, it is determined that hot water bottle 9, which is at a high temperature level of 4':1, requires steam.

In addition, Figure 4 allows thermal energy to be stored on the high temperature side when the temperature level of the high temperature waste heat source decreases, or when the user side has no fish cargo or a small load! The low temperature side heat storage device 15 is used as an evaporator, and the high temperature side heat storage device 16 is used as a condenser.

In addition, when heating the high temperature side heat storage 1116KIl, as shown in the #Is figure, a waste heat boiler 32 is attached, and external waste gas and further waste gas from the engine 12 that drives the compressor 11 is guided to this. - It is also possible to burn it and recover its thermal energy. In addition, low temperature storage heat storage l5
If the O11 degree level is low, the configuration may be such that thermal energy is used and sent from the thermal storage mil@ via the route indicated by the reference numeral 34 to l1l-.

Figure 6 shows an operating state in which the power generator 20 is operated, with the recovery cycle 10 configured as a low-temperature heat storage 1i1st evaporator and the second radiator 18 as a condenser, when power is supplied to the user side. It shows.

In this case, part of the route of the power generation device 20 is connected to the pipe 33a.

33bK may be connected to the high temperature side heat storage device 16, and its thermal energy may also be utilized. In such a configuration, the drive machine 12 such as the engine for driving the compressor 11 described above is driven using part of the electric power obtained directly from the turbine 21 or the generator 22. This will be advantageous in terms of heat pump efficiency.

Note that as the medium used in the above-mentioned power generation device 20, it is preferable to use OIi which has a low boiling point.

In addition, as a modification of the operating state shown in Fig. 111g6, the high temperature side heat storage device 16 is made to act as an evaporator as shown in Fig. aI3, and also as a condenser! It will be obvious that the power generation device 20 may be operated using two radiators 18.

Therefore, in the device having the above-mentioned configuration, fluctuations in quantity and temperature level of the heat pump, waste heat source, and user side can be absorbed by skillfully combining the recovery cycle 10 by the heat pump and the two heat storage units 15,1@. As a result, waste heat energy can be efficiently recovered, and hot water9@
This makes it possible to effectively use the recovered energy to meet the diverse needs of users, such as air and electricity. If it is configured to be movable, there will be no space restrictions and it will be able to handle all types of heat sources and users, which is a great advantage.

In addition, in the ninth embodiment described above, the first heat exchanger is used as the heat radiating heat exchanger.
and second heat dissipation l117. The R5 can be configured to obtain hot water, etc. and electric power at the same time using II, and the configuration of other parts can be changed as appropriate.

Furthermore, in the apparatus according to the present invention, among the nine operating methods described above, the states shown in FIGS. 2, 4, and 6 can be operated simultaneously, and in this way, the energy Diversify its use and its usefulness will be great.

(9) In the apparatus according to the present invention, as a heat pump used in the recovery cycle 10, the medium is heated upstream of the compressor 11 by self-heating or an external waste heat source, etc., to reduce the driving energy necessary for driving the compressor. It is possible to use a heating and pressurizing type, and the heat energy recovered by this recovery device may also be used not only from waste heat sources but also from other energy sources such as solar heat. be.

As explained above, the heat storage type waste heat recovery device according to the present invention has a low cost compared to a compression type heat pump.

Two heat storage devices for high temperature use and a heat exchanger for heat radiation are combined, and these two heat storage devices and the heat exchanger are selectively operated as the evaporator or condenser of the heat pump. Despite its simple configuration, it can deal with fluctuations in quantity and temperature levels of waste heat sources and users, efficiently recover various types of waste heat energy, and effectively utilize the recovered energy to meet a variety of needs. It can be used with great effect.

[Brief explanation of the drawing]

Figure 1 is an overall schematic configuration diagram showing one implementation of the heat storage/waste heat recovery device used in this plant, and Figures 2 to 6 are configuration diagrams of the main parts of the system to explain its use. be. 10...Recovery cycle (heat pump), 11...
...Compressor, 14...Expansion valve, 15...Low temperature side heat storage device, 1B...High temperature side heat storage device, 17. lit...
Parable: Heat radiator (heat exchanger for heat radiation), 19... Pipe line, 2
0...Power generation device. 41 applicants Mitsui Engineering & Shipbuilding Co., Ltd. Agent Masaki Yamakawa (and 1 other person) 3rd
Fig. 1゜/-/ Fig. 5 Tato music difference H Toga χ

Claims (1)

[Claims] In addition to recovering heat energy from a low heat source or b by reducing the amount of S,
The condenser is equipped with a compression heat pump that provides heat energy to the 'CI4 heat source, stores O heat energy from a low-temperature waste heat source, and selectively collects it in the middle of the meridian of the heat pump.
11 A low-temperature side heat storage device that acts as a steamer, and a low-temperature side heat storage device that stores O heat energy from a high-temperature waste heat source, and is selectively connected in the middle of the heat pump O passage, and the IIA slack amount★9 acts as a condenser. The amount of high temperature storage heat that acts and the amount of heat ff1
k-) A waste heat recovery device for a heat storage section, which is equipped with a heat exchanger for dissipating heat that acts as the condenser and stores heat energy to the user side, with the pump Om running through the passageway Kjl optional K11l.