JPH06347183A - Heat utilizing system in fine quality attaining process - Google Patents

Abstract

PURPOSE:To provide a heat utilizing system in the fine quality attaining process of liquid or gas, capable of improving the fine quality (puryfying) speed and the heat recoverying efficiency. CONSTITUTION:A heat pump 4 is interposed between a fine quality processing means (for example, an aeration layer 10) of liquid or gas and a cold heat utilizing means 6, so as to circulate heat between the fine quality processing means side and the cold heat utilizing means by taking the heat pump as a parameter. Preferably, a latent heat medium to be made to coexist with microorganism as a latent heat medium is arranged in the aeration layer, so as to accumulate and radiate heat at the same time of the heat exchange, and the exchanged heat is utilized for the cooling source or heat source of an outside air-conditioner through the heat pump 4, or for raising temperature of the aeration layer, so as to promote the purifying process. Thus, not only the miniaturization of a facility but also the promotion of the puryfying speed and the increase of the coefficient of heat utilization become possible by unifying the purifying means to the heat utilizing means.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat utilization system in quality improvement treatment, and particularly when quality improvement of gas or liquid (for example, purification of waste gas, production of clean water, or purification of sewage). The present invention relates to a heat utilization system capable of mutually exchanging necessary heat between the cooling and heat utilization means and the cold heat utilization means, thereby improving quality improvement efficiency and heat utilization efficiency.

[0002]

2. Description of the Related Art One of the main measures to reduce carbon dioxide emissions, which is the main cause of global warming, is regional warming by pumping unused heat from river water, sewage, industrial wastewater and exhaust gas with a heat pump. Cooling (DHC) systems are widespread. As an example, a DHC system using river water (for example, building equipment and plumbing, September 1991, p. 64) and a DHC system that uses treated sewage after purifying sewage (for example, energy resources, Vol. 12.No.5 (1991), 4
Page 88) etc.

A typical system of the latter is shown in FIG. This refining system comprises an aeration tank 1, a precipitation tank 2, a heat exchanger 3, a heat pump 4, a heat storage tank 5, and a cold heat utilization means 6 which is a demand destination. Sewage 100 as treated water
Is sent to the aeration tank 1 which is a quality improvement (purification in this example) means, and the impurities are removed by the microorganisms contained in the activated sludge while contacting the air 102 supplied thereto. Thereafter, the microorganisms are settled and separated in the settling tank 2, and the separated sewage-treated water 101 is heat-exchanged by the heat exchanger 3 outside the system and then discharged.

[0004] In such a treatment system, in the summer when the sewage treated water 101 is used as a cooling source of the heat pump 3, the heat medium 110 sent to the heat pump 4 by the pump 120 is there. After being heated to near 40 ℃, enter the heat exchanger 3 and treat the sewage treated water 101 at 30 ℃.
It is cooled to a certain degree and returned to the heat pump 4 as a cooling source again. On the other hand, the sewage-treated water 101 is discharged to the heat exchanger 3 after being heated to about 37 ° C. Cold water 111 is produced from the heat pump 4 and stored in the heat storage tank 5 by the horn 121. Cooling heat utilization means 6 for buildings and the like according to heat demand for cooling, etc.
Cold water 112 is sent to the pump 122 via the pump 122.

[0005]

DISCLOSURE OF INVENTION Problems to be Solved by the Invention In the district heating and cooling system utilizing the unused heat of the conventional sewage treatment water as described above, from the viewpoint of heat transfer, the quality of the object to be treated ( The (purification) side part and the cold / heat utilization part on the heat demand side are independent of each other, and heat exchange between them is not achieved. That is, for example, when purifying sewage by microorganisms, it is usually desirable to create a high temperature environment to enhance its activity, but the amount of heat required therefor is usually brought from a heat source outside the system, and The low-temperature heat of the treated water after purification is simply discarded or used as a heat source for the cold heat utilization means which constitutes another independent system via a heat exchanger.

[0006] This not only accounts for the total heat loss but also requires a separate heat exchanger and heat storage tank (which may occupy more than half of the installation space). This causes inconveniences such as an increase in operating cost and an increase in installation space. The present invention is intended to eliminate the disadvantages of the conventional system as described above, and more specifically, a refining means that is a generation source of unused heat and a cold heat utilization portion that is a heat demand side. By organically combining the two and mutually exchanging heat between them, it is possible to improve the total heat utilization efficiency and to provide a space-saving and highly economical heat utilization system in the upgrading process. It is an object.

[0007]

As a result of detailed analysis of the problems of the above-mentioned conventional system, the present inventors have found that the root cause thereof is a process for improving the quality of treated water such as purification, which is a source of unused heat. It has been found that heat utilization is performed completely between the cold heat utilization process on the heat demand side and the heat demand side. Therefore, by further research and analysis, we perceive that it is effective to mutually exchange heat between the upgrading process and the cold heat utilization process as means for eliminating the root cause, and the present invention It came to eggplant.

That is, the present invention basically relates to a heat utilization system in which a heat transporting means such as a heat pump is preferably interposed between a liquid or gas upgrading treatment means and a cold heat utilization means. The heat utilization in the upgrading treatment is characterized in that heat is mutually exchanged between the upgrading treatment means side and the cold / heat utilization means side via the heat transport means. Disclose the system.

In the above system, by using the latent heat medium utilizing the heat absorption / heat generation phenomenon (latent heat transfer) at the time of phase change as the heat transfer medium on the quality improvement processing means side, it is possible to improve the heat utilization efficiency and save space. it can. As the latent heat medium, a simple substance or a mixture of an organic substance and an inorganic substance described later can be used. Performing quality improvement treatment with bacterial cells such as microorganisms,
In addition, it is effective to use cells immobilized in a gel-like substance as the cells. As the gelling agent for gelling the bacterial cells, there are natural organic polymers and synthetic organic polymers described later, and the addition amount of the gelling agent is slightly different depending on the combination, but 0.5 to 10% by weight is suitable. Furthermore, by using a composite mass in which the bacterial cells and the latent heat medium are mixed on the quality improvement processing means side, it is possible to improve purification heat recovery efficiency and save space for heat storage.

The composite mass may be one in which one or more of the latent heat medium is dispersed in a gel-like substance on which the bacterial cells are immobilized, and further, the surface shape thereof has irregularities. It may be Thereby, the heat exchange efficiency is further improved. Furthermore, by configuring the upgrading treatment means with the upgrading treatment tank and the heat exchange means, and by making the latent heat medium or the composite mass flow and circulate between them,
The system configuration can be simplified. In addition, anaerobic microbial treatment and / or aerobic microbial treatment is performed as the qualitative treatment, and the heat recovered from the treated water after the treatment is used for heating the microbial treatment to improve the qualitative (purification) ability. It

The heat utilization system in the upgrading treatment according to the present invention is applicable to the drinking water production process as well as to the purification treatment of sewage in the sewage treatment process. In particular, when the target is tap water (clean water) production, it becomes possible to purify tap water and control temperature at the same time in addition to using heat to the outside.
It is possible to obtain drinking water that suits your taste.

[0012]

First, by allowing heat to be exchanged between the upgrading means and the heat utilizing means, it is possible to downsize the upgrading heat utilizing apparatus, and at the same time, to control the upgrading process to an appropriate temperature. It is possible to increase the conversion ability. Furthermore, by combining the quality improvement means and the heat storage means, the heat storage tank space can be significantly reduced and the heat recovery rate can be increased. Moreover, since the temperature of the refining means is stable irrespective of changes in external conditions, there is no change in refining performance and reliability is improved.

As described above, according to the present invention, since the quality improvement capability and the heat utilization rate can be improved by combining the quality improvement means with the heat storage means or the heat exchange means, the system can be downsized, the space can be saved, and the operation can be improved. Cost can be reduced.

[0014]

EXAMPLES The heat utilization system in the upgrading process according to the present invention will be described in more detail with reference to some examples. FIG. 1 is an explanatory diagram of an embodiment of a heat utilization system in a quality improvement process according to the present invention, and shows a heat utilization system targeted for purification treatment of sewage. This system comprises a heat exchange tube (or plate) 12 as a heat exchange means in an aeration tank 10 and a latent heat medium mass 20 as a heat storage means described later.
Is basically different from the above-described conventional system (see FIG. 12) in that it is installed or put in, and that it does not have a heat exchanger for heat exchange with the treated water 101. There is.

As a result, in this system, the sewage 100 sent to the aeration tank 10 which is the purification means is in contact with the air 102 supplied thereto, and impurities are removed by microorganisms (activated sludge) at the same time. Heat is transferred between the latent heat medium mass 20 and the heat exchange tube 12. After that, the microorganisms are settled and separated in the settling tank 2, and the separated sewage-treated water 101 is discharged as it is outside the system.

The operating state of this system will be described below. The following is an example of summer when the sewage 100 is used as a cooling source for the heat pump 4. At night or morning and evening when the heat pump 4 does not operate, the sewage 100 flowing into the aeration tank 10
Cools the latent heat medium mass 20 in the tank and solidifies it to store cold heat. When cooling in the daytime, the heat medium 110 sent by the pump 120
Is heated to about 40 ° C. by the heat pump 4, enters the heat exchange tube 12, is cooled to about 30 ° C. in the tank, and is returned to the heat pump 4 as a cooling source again. On the other hand, the sewage 100 in the tank will be heated up to about 37 ° C,
As a result, the activity of microorganisms in the tank becomes active, and the purification capacity for sewage increases. At the same time, cold water 111 is produced from the heat pump 4 and stored in the small heat storage tank 5 by the horn 121. The cold water 112 is sent via the pump 122 to the cold heat utilization means 6 which is a demand destination such as a building according to the heat demand of the air conditioner or the like.

As is apparent from the above description, in this embodiment, the waste heat from the heat pump 4 is effectively used for heating the aeration tank 10, and thereby the purification performance of the aeration tank is increased as compared with the conventional example. Therefore, downsizing of aeration tank 10 and sewage treatment water
The heat exchanger 3 with 101 becomes unnecessary. In addition, latent heat medium 2 at night
Since the heat can be stored at 0, the heat storage tank 5 that is separately installed to absorb the inconsistency between the inflow of the sewage 100 and the heat demand of the demand destination 6 is unnecessary or can be significantly downsized, and space can be saved. Is.

Further, in this system, the aeration tank 10 is kept warm by the heat accumulated in the latent heat medium 20 even during the night or morning and evening when the heat pump is not operated, and a sharp temperature drop does not occur. Inhibition of activity is greatly improved. Not hindered. The latent heat medium mass 20 to be charged will be described. FIG. 2 shows an example thereof.
The latent heat medium mass 20 is filled with a latent heat medium 21 described later by a thin plastic shell 22. The shell 22 further comprises a conventionally known immobilized microorganism, that is, a microbial cell 24.
Is covered with a gel phase 23 that holds the surface near the surface. In this embodiment, since the microorganisms can be retained at a high density in the gel phase (particularly on the surface), the purification treatment rate by the microorganisms can be increased. shell
22 is unnecessary if the strength of the gel phase and the liquid permeation blocking property are excellent. Further, like high-density polyethylene, by increasing the degree of polymerization only on the surface to form a solidified (densified) phase, the solidified phase can be used as a shell. An example of the above-mentioned immobilized microorganism is “Efficiency of nitrification ability of sewage treatment by comprehensively immobilized nitrifying bacteria” (24th Annual Meeting of the Japan Society for Water Pollution (1990), pages 393-394). Has been discussed.

FIG. 3 shows another embodiment of the latent heat medium mass 20. In this example, a large number of latent heat mediums 21
Dispersed in. Thereby, the transfer of heat to the latent heat medium 21 is improved, and at the same time, the gel phase 23 and the shell 22 can be effectively prevented from peeling off. 5 shows still another embodiment of the latent heat medium mass 20 of FIG. In this example, gel phase 24
A large number of irregularities are formed on the surface of the water, thereby increasing the contact area between microorganisms and sewage (water to be treated). The latent heat medium mass 20 is a solid state latent heat medium 21 having a large number of irregularities on the surface by rapidly cooling while applying a slight vibration to the liquid state latent heat medium 21, and the surface is made of a resin material that becomes a shell 22. It can be obtained by a method of coating and supporting the gel phase 23 thereon.

The shape of the latent heat medium mass 20 and its manufacturing method are arbitrary, and in addition to the above manufacturing method, a conventionally known granulation method, die extrusion method or the like can be used. Generally, it is easy to manufacture spherical particles by the granulation method, and cubic, rectangular parallelepiped and columnar particles by the die extrusion method. An external dimension of about 4 to 20 mm is suitable from the viewpoints of surface area, fluidity and ease of manufacturing.

Although not particularly shown, the immobilized microorganisms, that is, the microorganism-containing gel mass and the latent heat medium mass may be separately prepared and mixed into the aeration tank 10, and the present invention is also similar. It will be easily understood that the purpose of is achieved. Producing the lumps separately in this manner has the advantages of facilitating the lump production and facilitating the maintenance of the lumps when there is a difference in life.

A latent heat medium which can be effectively used in the present invention
In addition to the high density polyethylene mentioned above,
, Paraffins, waxes (phase change temperature in number of carbon atoms
tm can be changed from 5 to 60 ℃) or caprylic acid (tm = 17
℃), capric acid (tm = 32 ℃), lauric acid (tm = 42 ℃), etc.
Fatty acids and various polyethylene glycols
There are molecular organics (tm can change depending on the molecular weight). Inorganic
Then CaCl₂・ 6H₂O (tm = 29 ℃), Na₂SO_Four・ 10H₂O (tm = 32 ℃), Li
ClO₃・ 3H₂O (tm = 8 ℃), Na₂S₂O₃・ 5H₂O (tm = 50 ℃), Na₂HPO_Four・ 12
H₂O (tm = 35.5 ℃) etc., LiNO₃・ 3H₂O, Ca (NO₃)₂・ 4H₂O,
Al (NO₃)₃・ 9H₂O, Na ₂CO₃・ 10H₂O, FeCl₃・ 6H₂There is O. Well
In order to change the phase change temperature tm, Na₂SO_Four(31%), NaC
l (13%), KCl (16%), H₂O (40%) mixed system (tm = 4 ℃) etc.
There is a crystalline inorganic mixture.

When an inorganic system is used as the latent heat medium, in order to prevent the occurrence of supercooling, a sparingly soluble strontium salt (such as stringium oxide), a barium salt (such as barium monohydrogen phosphate) or a physical medium is used. In addition, aluminum powder, carbon powder, a powder adsorbent, a powder material such as diatomaceous earth, or a fiber material is added as a nucleating agent as the core fine particles. Examples of gelling agents that can be effectively used in the present invention include natural organic polymers such as gelatin, starch, cross-linked starch,
There are cellulose polymers and the like, and as synthetic polymers, polyvinyl alcohol, polyacrylic acid, polyethylene oxide, polyacrylamide, polymethacrylamide,
Examples thereof include polyhydroxyalkyl methacrylate, polyethylene glycol, acrylonitrile grafted hydrolyzate, acrylic acid grafted product, polyvinyl pyridine and carboxymethyl cellulose. The addition amount of the gelling agent is slightly different depending on the combination, but if it is less than 0.5% by weight, the mixing of the gelling agent becomes non-uniform, the gel formation becomes insufficient, and the strength and durability are lowered. On the other hand, if it exceeds 40% by weight, the gel structure is destroyed and the gelling action is decreased. Therefore, the amount of gelling agent added should be 0.5 to 40% by weight.
Is appropriate.

In the apparatus shown in FIG. 12 and the apparatus shown in FIG. 1, paraffin and wax having a phase change temperature adjusted to 25 ° C. are used as the latent heat medium 21, and polyethylene is used for the shell 22.
In the gel phase 23, nitrifying bacteria are used as the bacterial cells and polyethylene glycol is used as the gelling agent to gel the latent heat medium 21 (mixing ratio by weight: bacterial cells 3%, gelling agent). 20
%, The rest was water), and a comparative experiment showed that the purification capacity by the microorganisms in the tank increased by 20 to 30%.

Next, another embodiment of the structure of the heat utilization type aeration tank 10 which can be effectively used in the purification heat utilization system of the present invention will be shown below. The embodiment shown in FIG. 5 is different from the heat utilization type aeration tank 10 shown in FIG. 1 in that the entire inside of the tank has a heat exchange area by a heat exchange tube 12, and the heat exchange area having the heat exchange tube 12 is an aeration tank. Formed in part of 10. Specifically, the inside of the tank is partitioned by two guides 13, and air 102 is placed below the area sandwiched between the guides 13, 13.
The aeration area 15 in which the cells of the latent heat medium mass 20 come into contact with the air, and the area outside the area is contacted by the latent heat medium mass 20 and the heat exchange tube 12 to exchange heat. The exchange area 14 is used. The latent heat medium mass 20 rises in the aeration region 15 by the upward flow of air, and the heat exchange region without the upward flow of air.
At 14, it circulates in both regions by sinking under its own weight.

Generally, the aeration space required for purification and the heat exchange space required for heat exchange do not always match. The use of the aeration tank according to the present embodiment is very effective when there is a large difference between the two spaces. Moreover, in the aeration tank according to the present embodiment, since the upflow and the downflow are clearly separated, there is no flow failure due to the occurrence of a stagnant region, etc., and the effect of increasing the contact efficiency because the latent heat medium flows smoothly is there.

FIG. 6 shows still another embodiment relating to the structure of the heat utilization type aeration tank 10. In this example, a region for performing a cleaning operation and a heat storage (or heat dissipation) operation on the latent heat medium,
It has a structure in which a region for heat dissipation (or heat storage) and a region for heat utilization are divided. Specifically, the latent heat medium mass 20 that has undergone the purification operation and the heat storage (or heat dissipation) operation in the heat utilization type aeration tank 10 is transferred to the external heat exchanger 3 ′ by the slurry pump 123.
Transport to. In the heat exchanger 3 ′, the latent heat medium mass 20 and the heat medium are
After the heat exchange of 110, the latent heat medium mass 20 is returned to the heat utilization type aeration tank 10 again, and circulates through the heat utilization type aeration tank 10 and the heat exchanger 3 ′.

In this embodiment, since the heat-utilizing aeration tank having the same structure as the conventional aeration tank can be used, when the aeration tank is large due to a large purification capacity (or a small purification speed), Alternatively, it is advantageous when the present invention is applied to conventional equipment. Next, another embodiment of the purifying heat utilization system according to the present invention will be described. FIG. 7 shows an embodiment of a system suitable for utilizing purified heat in winter. Generally, the higher the water temperature, the more active the microorganisms are, and since the water temperature is low in the winter, there is a problem that the purification ability of the microorganisms decreases. Therefore, in this embodiment, a part of the heat recovered from the treated water in winter is used for heating the aeration tank to increase the purification rate of microorganisms in winter.

The feature of this system is as shown in FIG.
A heat exchanger 3 for treated water is added downstream of the purification heat utilization system shown in FIG. 1, and the heat exchanger 3 for treated water is connected to the heat pump 4 via three-way valves 130, 131 for switching flow paths. Of the heat pump 4 and the heat exchange tube 12 by branching the connection flow path side between the heat pump 4 and the heat exchange tube 12 and the connection flow path side between the heat pump 4 and the demanded cold / heat utilization means 6 by a branch pipe. This is because the two-way valves 132, 133, and 134 for connecting the flow passages are provided and for switching the flow passages.

In the summer, by closing the two-way valves 132 and 133, the communication between the connection flow path side between the heat pump 4 and the cold / heat utilization means 6 and the connection flow path side between the heat pump 4 and the heat exchange tube 12 is cut off. . Further, the three-way valves 130 and 131 are operated to cut off the connection between the connection flow path side of the heat pump 4 and the heat exchange tube 12 and the treated water heat exchanger 3. As a result, as in the case of FIG. 1, the heat medium 110 circulates between the heat exchange tube 12 of the heat utilization type aeration tank 10 and the heat pump 4 and is used as cooling water when cold heat is generated.

On the other hand, in winter, on the other hand, three-way valves 130, 1
31 is operated to circulate the heat medium 110 between the heat exchanger 3 and the heat pump 4 of the treated water 101, and is used as heat source water when heat is generated. The heat generated from the heat pump 4 is the heat medium 11
Although it is obtained via 1, the opening degree of the two-way valves 132, 133, 134 is adjusted so that a part of the heat medium 111 is flown into the heat exchange tube 12 of the heat utilization type aeration tank 10 to remove the microorganisms in the tank. The heating medium is heated to accelerate the purification speed, and the remaining heat medium 111 is stored in the heat storage tank 5. According to the present embodiment, since the purification rate of microorganisms can be promoted together with the heating of the building 6 in the winter, it is possible to increase the heat utilization and the purification capacity in the winter.

Further, in the system of this embodiment, the sewage 100
And two-way valves 132 and 13 by detecting the flow rate, impurity concentration, and temperature fluctuations of the treated water 101 and the temperature and flow rate fluctuations of the cold water (warm water) 112.
A controller 17 is installed which adjusts the opening degree of 4 or the like and controls the return amount of the heat medium 111 to the aeration tank 10. In the winter, when the sewage treatment load increases or the water temperature decreases, the controller 17 is actuated to increase the return amount of the heat medium 111 to the aeration tank 10,
On the contrary, when the heating load increases, the return amount is reduced within a range in which the quality of the treated water can be maintained, and the maximum heat recovery is always performed at the optimal treatment speed.

FIG. 8 shows an embodiment of a system suitable for purification using nitrifying bacteria and denitrifying bacteria having a low microbial treatment rate.
In this system, the aeration tank 10 is composed of an anaerobic tank 18 using denitrifying bacteria and an aerobic tank 19 using nitrifying bacteria, and a heat exchanger 3 ′ is installed on the sewage side (upstream side) of the aeration tank 10. The system is different from the system shown in FIG. 7 in the point, and the other configuration is the same as the system shown in the FIG. 7. In this system,
It was noted that nitrifying bacteria and denitrifying bacteria, which have a low treatment rate, have a high temperature dependency that the treatment rate increases as the temperature increases.

That is, in the summer, as in the system shown in FIG. 7, the two-way valves 132 and 133 are closed to connect the heat pump 4 and the demand destination 6 to the connection flow path side, the heat pump 4 and the heat exchanger 3 '. Blocks communication with the connecting flow path side. Also,
By operating the three-way valves 130 and 131, the connection between the heat exchanger 4 for heat pump 4 and the heat exchanger 3 for treated water and the connecting flow path side of the heat pump 4 and the heat exchanger 3'is also cut off. As a result, as in FIG. 1, the heat medium 110 circulates between the heat exchanger 3 and the heat pump 4 and is utilized as a cooling source for the heat pump 4. At the same time, the heat recovered from the heat pump 4 is heated by the sewage 100 via the heat exchanger 3 ′ to raise the treatment temperature of the aeration tank 10 and increase the purification treatment rate of microorganisms.

On the other hand, in winter, the temperature of the sewage 100 decreases and the activity of microorganisms decreases.
Via the heat exchanger 3 or by manual operation to recover heat from the treated water 101 as the heat source of the heat pump 4 by the heat exchanger 3 via the heat medium 110, and as in the case of the system of FIG. Or, let the whole flow into the heat exchanger 3'and sewage 100
Utilize for heating. As a result, the reduction in the purification rate of microorganisms due to the decrease in temperature in winter can be eliminated.

For example, in the case of nitrifying bacteria, when the temperature rises by 5 ° C., the treatment rate increases by 20%, the treatment capacity can be increased or the aeration tank can be downsized. Also in the operation of the above system, as in the case of the system of FIG.
Flow rate, impurity concentration, temperature fluctuation of cold water (warm water) 112, and flow rate fluctuation are detected, and the controller 17 adjusts the openings of the two-way valves 132, 134. As another example, the heat exchanger 3 ′ may be installed in the aeration tank 10, which enables downsizing of the equipment. Further, a plurality of anaerobic tanks 18 and aerobic tanks 19 may be installed depending on the object to be treated and the target water quality value.

The embodiment described above is an example in which the heat utilization system in the upgrading process according to the present invention is applied to a sewage treatment system. Next, the system according to the present invention is applied to a tap water treatment system. The case of doing so will be described with reference to FIG. In other words, this embodiment is a heat utilization system in the upgrading process in which heat is mutually exchanged between the delicious drinking water production process by adjusting the water temperature and the heating and / or hot water supply process.

The taste of drinking water is greatly influenced by the water temperature, and it is said that 15 to 20 ° C. (especially around 17 ° C.) is suitable. This system pumps 200 raw water from a water source 151.
At 152, the clean water 201 is sent to the water purification plant 150, and is sent to factory water 161, household water 162, drinking water 163, etc. via each distribution reservoir 153. Furthermore, in this embodiment, the distribution reservoir 153 for drinking water and the distribution reservoir 153 'for household water are provided.
Heat exchange tubes 12 and 12 ′ are installed in and, respectively, and are connected to the heat pump 4 via a switching valve 171. Further, the heat pump 4 is connected to the cold / heat utilization means 6 such as a building directly or through the heat storage tank 5.

The distribution reservoir 153, which is normally sent as drinking water
The heat quantity of the distribution reservoir 153 is recovered as a heat source of the heat pump 4 via the heat exchange tube 12 installed in the heat pump, and the heat is supplied to the cold heat utilization means 6 such as a building for heating or hot water supply.
As a result, the water temperature of the distribution water 153 is lowered at the same time, and the water is sent to each household as drinking water 163 at a temperature (about 17 ° C.) suitable for drinking. In some cases, the temperature of the tap water sent as domestic water may be raised by discharging the heat recovered from the cold / heat utilization means 6 to the water distribution reservoir 153 ′ via the heat exchange tube 12 ′. It should be easily understood that, in this embodiment, it is not always necessary to install the heat exchange tubes 12 ′ in the distribution reservoir 153 ′ that is sent as domestic water.

Although the above is an example for improving the quality of water, the heat utilization system in the quality improving treatment according to the present invention can be applied to the quality improvement of gas such as exhaust gas. FIG. 10 shows an embodiment for improving (purifying) gas. This system comprises a steam generating boiler 140, a purifier 142 for exhaust gas 141, and heat utilization means similar to those in the other embodiments. The purification device 142 is filled with a purification agent lump 180 made of an adsorbent such as activated carbon or zeolite for removing harmful impurities such as SO _X and NO _X in the exhaust gas 141, and the heat exchange tube 12 is installed. There is. Note that, as in this example, when it is planned to recover a sufficiently high temperature from the upgrading processing means, a heat pump is not necessarily required as the heat transporting means, and the heat pump and the cold heat utilizing means side are not required to be used as they are. Flexibility is also possible.

FIG. 11 shows a purifier block 180 that is preferably used.
An example will be shown. This is a type in which a latent heat medium 181 is filled inside a purifying agent 182, and its shape and dimensions are the same as those shown in FIGS. The purifier block 180 is formed by granulating powder or granular activated carbon with a binder in a state in which the latent heat medium 182 is enclosed. The selection of latent heat medium depends on the exhaust gas temperature to be treated,
The latent heat medium described above may be appropriately selected. Further, when the purifying agent is a liquid absorbent, a method in which the exhaust gas is flowed while the absorbent is sprinkled into a capsule in which only the latent heat medium is encapsulated is preferably used.

Generally, the adsorbent tends to generate heat when adsorbing a gas, and its adsorbing capacity tends to increase as the temperature lowers. In the present embodiment, the purifying device 142 can cool the adsorption heat while applying heat to the latent heat medium of the purifying agent mass 150 to prevent the adsorption rate from decreasing. On the other hand, the heat stored in the latent heat medium can be recovered by the heat exchange tube 12 via the heat medium 110 as a heat source of the heat pump 4 and supplied to the heat utilization means 6 side.

[0043]

According to the heat utilization system in the upgrading process of the present invention, a heat transport means such as a heat pump is preferably interposed between the liquid or gas upgrading process means and the cold heat utilization means, Between the quality improvement processing means side and the cold / heat utilization means side, the heat pump serves as an intermediary for mutual heat exchange, which not only downsizes the target equipment but also improves the quality of the object to be processed. It is possible to increase capacity and heat utilization rate.

[Brief description of drawings]

FIG. 1 is a configuration example of a microbial purification heat utilization integrated system according to the present invention.

FIG. 2 is a cross-sectional view of a typical latent heat medium mass used in the present system.

FIG. 3 is a cross-sectional view of another latent heat medium mass used in the present system.

FIG. 4 is a cross-sectional view of a purification rate acceleration type latent heat medium mass used in the present system.

FIG. 5 is a cross-sectional view of a heat utilization type aeration tank suitable for improving the flow of the present system.

FIG. 6 is a cross-sectional view of a heat-utilization type aeration tank suitable for mass processing of the present system.

FIG. 7 is a configuration example of a microbial purification heat utilization integrated system suitable for winter operation.

FIG. 8 is an example of the configuration of a nitrogen / organic matter simultaneous removal type microbial purification heat utilization integrated system.

FIG. 9 is a structural example of a water purification heat utilization integrated system suitable for producing good quality water.

FIG. 10 is a configuration example of an integrated system for utilizing exhaust gas purification heat with improved removal performance.

FIG. 11 is a cross-sectional view of a typical latent heat medium mass used in the exhaust gas target system (FIG. 10).

FIG. 12 is a configuration example of a conventional microbial purification heat utilization separation system.

[Explanation of symbols]

2 ... Settling tank, 4 ... Heat pump, 5 ... Heat storage layer, 6 ... Cooling / heat utilization means, 10 ... Aeration layer, 12 ... Heat exchange tube, 20 ... Latent heat medium mass

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification number Internal reference number FI Technical display location F25B 27/00 Z 7616-3L F28D 20/00 DE (72) Inventor Kenji Baba Hitachi City, Ibaraki Prefecture 7-1-1 Omika-cho, Hitachi, Ltd. Hitachi Research Laboratory

Claims (11)

[Claims] 1. A heat utilization system in which a heat transport means is interposed between a liquid or gas upgrading treatment means and a cooling / heating utilization means, wherein the upgrading treatment means side and the cooling / heating utilization means side. A heat utilization system in a refining process, characterized in that heat is mutually exchanged through the heat transfer means as a medium. 2. The heat utilization system in the upgrading process according to claim 1, wherein the heat transport means is a heat pump. 3. The heat utilization system in the upgrading process according to claim 1 or 2, wherein a latent heat medium utilizing an endothermic heat generation phenomenon (latent heat transfer) during a phase change is used as a heat transfer medium on the side of the upgrading process. A heat utilization system in the upgrading process. 4. The heat utilization system in the quality improving process according to claim 1 or 2, wherein the quality improving process means performs the quality improving process with cells such as microorganisms. . 5. The heat utilization system in the quality up treatment according to claim 4, wherein the cells immobilized in a gel-like substance are used as the cells. 6. The heat utilization system in the upgrading process according to claim 1 or 2, wherein a complex mass obtained by mixing a latent heat medium as a heat transfer medium and a microbial cell such as a microorganism for performing the upgrading process is used as the upgrading process means. A heat utilization system in the upgrading process characterized by being used on the side. 7. The heat utilization system in the upgrading process according to claim 6, wherein the complex mass is one in which one or more latent heat mediums are dispersed in a gel-like substance on which the bacterial cells are immobilized. A heat utilization system in the upgrading process. 8. The heat utilization system in the quality improving process according to claim 7, wherein the composite mass has a gel-like substance on which the bacterial cells are immobilized, the surface shape of which is uneven. Heat utilization system in Japan. 9. The heat utilization system in the quality improvement process according to claim 1, 2 or 6, wherein the quality improvement treatment means has a quality improvement treatment tank and a heat exchange means, and the latent heat medium or the composite mass is provided between them. A heat utilization system in the upgrading process, which is characterized by fluid circulation. 10. The heat utilization system in the upgrading process according to claim 1 or 2, wherein anaerobic microbial treatment and / or aerobic microbial treatment is performed as the upgrading treatment, and heat recovered from the treated water after the treatment. A heat utilization system in the upgrading process, wherein the heat utilization system is used for heating of microbial treatment. 11. The heat utilization system in the quality improvement process according to claim 1 or 2, wherein the quality improvement process is a water purification process or a sewage purification process.