JPH1192109A - Ozone adsorption / desorption equipment cooling / heating equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooling and heating device of an ozone adsorption / desorption device in which a cooling and heating jacket has hot brine removed during cooling and cold brine removed during heating. SOLUTION: A cooling and heating jacket 3 which contains an adsorption tower 1 and is cooled by a cold brine 5a and heated by a hot brine 8a;
A cold brine supply device 4 for supplying a cold brine 5a to the cooling and heating jacket 3, a hot brine supply device 7 for supplying a hot brine 8a to the cooling and heating jacket 3, and a cold brine supply device 4 for the cooling and heating jacket 3 from the cold brine supply device 4. 5a, and the hot brine 8a from the hot brine supply device 7.
, A cold brine return line 12 for returning the cold brine 5 a from the cooling and heating jacket 3 to the cold brine supply device 4, and a warm brine 8 a for returning to the warm brine supply device 7 from the cooling and heating jacket 3. A warm brine return line 13 and a supply / exhaust line 15 provided at the top of the cooling and heating jacket 3 for flowing air.
Consisting of

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling and heating apparatus for an ozone adsorption / desorption apparatus which adsorbs and accumulates generated ozone and desorbs and releases the accumulated ozone.

[0002]

2. Description of the Prior Art The use of ozone for bleaching paper, pulp and the like, which has no adverse effect on the environment, has been widespread. Ozone is generated by an ozone generator using oxygen as a raw material by a method such as electric discharge, ultraviolet irradiation, or electrolysis. The ozone thus generated is once adsorbed in the adsorption tower, accumulated and concentrated. Adsorption is 9-10atm (absolute pressure)-
It is performed at 60 to 0 ° C. Next, in order to supply to a supply destination, it is heated and desorbed and sent to the supply destination together with a carrier gas such as nitrogen or dry air. Desorption is 1-9 atm and -6
Performed at 0-40 ° C. Since the adsorption reaction involves heat generation, it is necessary to perform cooling. The desorption reaction involves heat absorption, so that heating is performed. In some cases, desorption is performed under reduced pressure to room temperature, and in particular, without heating.

In an ozone adsorption tower, an adsorption cylinder having a general proportion as a cylinder is filled with silica gel or the like as an ozone adsorbent, and a cooling pipe is wound around or around the cylinder to adsorb ozone, and a refrigerant from a refrigerator is supplied to the ozone adsorption tower. For the ozone desorption, a heating tube is wrapped around or inside the cylinder to pass hot water from the heating device. Japanese Patent Publication No. 61-3282 discloses an apparatus for wrapping a cooling pipe around the outer circumference of a cylinder for adsorbing ozone, allowing a refrigerant from a refrigerator to pass through, and passing hot water through a jacket containing the cylinder and the cooling pipe.

[0004]

The method of providing a cooling pipe and a heating pipe is to cool the hot brine in the heating pipe when cooling with the cooling pipe at the time of adsorption, and also heat the cold brine of the cooling pipe at the time of desorption. As a result, cooling and heating energy is lost, and cooling and heating are delayed. Tokiko Sho 61-3282
This is improved by removing the hot water from the jacket when cooling, but cooling is done, but the cooling brine of the cooling pipe is heated as it is during heating, which is not a sufficient improvement .

The present invention has been made in view of the above problems, and provides a cooling and heating device for an ozone adsorption / desorption device in which a cooling and heating jacket has hot brine removed during cooling and cold brine removed during heating. The purpose is to do.

[0006]

In order to achieve the above object, according to the first aspect of the present invention, an ozone adsorbent is cooled in an adsorption tower filled with the ozone adsorbent, and a gas containing ozone is passed to adsorb ozone. A cooling and heating device of an ozone adsorption and desorption device for heating and desorbing ozone by heating an ozone adsorbent, wherein the cooling and heating jacket includes the adsorption tower, is cooled by a cold brine, and is heated by a warm brine. A cold brine supply device for supplying brine, a warm brine supply device for supplying warm brine to the cooling and heating jacket, and a cold brine supply to the cooling and heating jacket from the cold brine supply device and a warm brine from the warm brine supply device. A cold supply line for supplying cold brine from the cooling and heating jacket to the cold brine supply device. Includes a inlet line, a hot brine reversal lines reversals warm brine from said cooling heating jacket to the hot brine supply device, and a supply and exhaust line to be the flow of air provided at the top of the cooling heating jacket.

[0007] There is only one cooling and heating jacket. When cold brine is supplied from the cold brine supply device, the warm brine is discharged to the hot brine supply device, and when warm brine is supplied from the hot brine supply device, the cooling brine is cooled. Since the brine is discharged to the cold brine supply device, there is no need to cool the hot brine during cooling or to heat the cold brine during heating. As a result, useless energy is not consumed, and the rise of cooling and heating is fast.

According to a second aspect of the present invention, there is provided an ozone adsorber for cooling an ozone adsorbent into an adsorption tower filled with the ozone adsorbent, adsorbing ozone through a gas containing ozone, and heating the ozone adsorbent to desorb ozone. A cooling and heating device for the desorption device,
A cooling and heating jacket that encloses the adsorption tower and cools with a cold brine and heats with a warm brine, a cold brine supply device that supplies a cold brine to the cooling and heating jacket, and a hot brine supply that supplies a warm brine to the cooling and heating jacket A cold brine supply line for supplying cold brine from the cold brine supply device to the cooling and heating jacket, a hot brine supply line for supplying warm brine from the warm brine supply device to the cooling and heating jacket, A brine return line for returning cold brine from the jacket to the cold brine supply device and returning warm brine to the warm brine supply device, and a supply / exhaust line provided at the top of the cooling and heating jacket to suction and push in air, Is provided.

The present invention operates in the same manner as the first aspect of the present invention, except that the supply of brine to the cooling and heating jacket is performed by negative pressure due to the suction of air at the top of the jacket, and the brine is discharged by pressurization. Different. This allows the brine in the cooling and heating jacket to be quickly discharged.

According to a third aspect of the present invention, in the second aspect of the present invention, a brine discharge pump is provided in the brine return line.

By providing a brine discharge pump in the brine return line, the brine in the cooling and heating jacket can be discharged in a shorter time.

According to a fourth aspect of the present invention, in the first and second aspects, the cold brine and the warm brine are made of the same material.

Since the cooling and heating jackets alternately include cold brine and warm brine, the use of the same material brine does not cause a decrease in function even when both are mixed.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. In each drawing, the same reference sign represents the same meaning. FIG. 1 shows an ozone adsorption / desorption device of the first embodiment. The adsorption tower 1 is a container having a vertically long cylindrical shape and is usually made of metal, but may be made of plastic or ceramics. The adsorption tower 1 is filled with an ozone adsorbent 2 such as silica gel. Gas inlet 1 at the top of adsorption tower 1
a, and a gas outlet 1b is provided at the bottom. When the ozone is adsorbed, a mixed gas of oxygen gas and ozone enters through the gas inlet 1a, the ozone is adsorbed by the adsorbent 2, and the oxygen gas exits the gas outlet 1b. An inert gas such as a gas enters through the gas inlet 1a, and a mixed gas of nitrogen gas and ozone desorbed from the ozone desorbing material 2 exits through the gas outlet 1b.

The adsorption tower 1 is provided in a cooling and heating jacket 3 having a cylindrical top plate 3a and a bottom plate 3b. The cold brine supply device 4 includes a cold brine tank 5 that stores cold brine 5a, and a refrigerator 6 that sends a refrigerant to a cooling pipe 6a that cools the cold brine 5a and cools it. The hot brine supply device 7 includes a hot brine tank 8 for storing hot brine 8a, and a heater 9 for feeding high-temperature water to a heating pipe 9a for heating the hot brine 8a for heating. Cold brine 5a and hot brine 8
The same substance as a is used, for example, a mixture of ethylene glycol and water. A brine supply line 11 for supplying brine from the cold brine tank 5 and the warm brine tank 8 to the cooling and heating jacket 3; a cold brine return line 12 for returning brine from the bottom plate 3 b of the cooling and heating jacket 3 to the cold brine tank 5; A warm brine return line 13 for returning to the warm brine tank 8 is provided. Brine supply line 1
1 is a stop valve 20, 21 at a branch to each brine tank 5, 8.
The brines 5a and 8a of the brine tanks 5 and 8 are supplied to the upper portion of the cooling and heating jacket 3 by the brine supply pump 14 located downstream of the junction. Stop valves 22 and 2 are also provided in the cold brine return line 12 and the warm brine return line 13, respectively.
3 are provided.

The top plate 3a of the cooling and heating jacket 3 is provided with a supply / exhaust line 15 for opening the top space to the atmosphere, and is opened and closed by a stop valve 24 to the atmosphere. A level gauge 16 is provided on the top plate 3a of the cooling and heating jacket 3 to measure the liquid level of the brines 5a and 8a, and the brine supply pump 14 is controlled so that the liquid level becomes a preset target value.

The operation of the first embodiment configured as described above will be described. During ozone adsorption, first, the refrigerator 6 is operated to cool the cold brine 5a to a predetermined temperature, for example, −30 ° C., the stop valve 20 is opened, the stop 21 is closed, and the brine supply pump 14 is operated to cool and heat. The cold brine 5 a is supplied to the jacket 3. When the value measured by the level meter 16 reaches the target value, the stop valve 22 of the cold brine return line 12 is opened, and the brine supply pump 14 is operated to maintain the target value. In this state, an oxygen gas containing ozone is supplied from the ozone generator from the gas inlet 1a of the adsorption tower 1, the ozone is adsorbed by the ozone adsorbent 2, and the oxygen is discharged from the gas outlet 1b and returned to the ozone generator.

When the ozone adsorption step is completed, the brine supply pump 14 is stopped, the stop valve 24 of the supply / exhaust line 15 is opened, the cooling / heating jacket 3 is opened to the atmosphere, and the cold brine return line is prepared for the next ozone desorption step. The 12 stop valves 22 are opened to discharge the cold brine 5 a into the cold brine tank 5. When the discharge of the cold brine 5a is completed, the supply / exhaust line 1
The stop valve 24 of No. 5 is closed, and then the heater 9 is operated to supply high-temperature water to the heating pipe 9a to heat the hot brine 8a. When the temperature of the warm brine 8a reaches a predetermined temperature, for example, 40 ° C., the stop valve 20 is closed, and the stop valve 21 is opened.
Is operated to supply the warm brine 8a to the cooling and heating jacket 3. When the value measured by the level meter 16 reaches the target value, the stop valve 23 of the warm brine return line 13 is opened, and the brine supply pump 14 is operated to maintain the target value. In this state, a carrier gas such as nitrogen is supplied from the gas inlet 1a of the adsorption tower 1, and is taken out from the gas outlet 1b together with ozone desorbed from the ozone adsorbent 2 and sent to the supply destination.
When the ozone desorption process is completed, the brine supply pump 14 is stopped, the stop valve 24 of the supply / exhaust line 15 is opened, the cooling / heating jacket 3 is opened to the atmosphere, and the warm brine return line 1
By opening the stop valve 23 of No. 3, the warm brine 8a is discharged into the warm brine tank 8. When the discharge of the warm brine 8a is completed, the stop valve 24 of the supply / exhaust line 15 is closed to prepare for the next ozone adsorption step.

Next, a second embodiment will be described with reference to FIG. This embodiment is different from the first embodiment in that the brine 5a, 8a is quickly discharged from the cooling and heating jacket 3. Adsorption tower 1, cooling and heating jacket 3,
The equipment such as the cold brine supply device 4, the hot brine supply device 7, and the level meter 16 are the same as those in the first embodiment shown in FIG. A cold brine supply line 31 for sending the cold brine 5a from the cold brine tank 5 to the cooling and heating jacket 3 and a warm brine supply line 32 for sending the warm brine 8a from the warm brine tank 8 to the cooling and heating jacket 3 are provided. Stop valves 40 and 41 are provided near the entrance of the jacket 3. A brine return line 33 is provided for branching and returning the brine from the bottom plate 3b of the cooling and heating jacket 3 to the cold brine tank 5 and the warm brine tank 8. The brine return line 33 is provided with a stop valve 4 at a branch path to each of the brine tanks 5 and 8.
The brine 5a, 8a is returned to each of the brine tanks 5, 8 by a brine return pump 34 located upstream of the branch point.

A suction and pressure line 35 is connected to the top plate 3a of the cooling and heating jacket 3 for depressurizing the space at the top and sucking the brines 5a and 8a, and pressurizing and discharging the brines 5a and 8a. Pump 36 and stop valve 4 for performing
4 are provided. Top plate 3a of cooling / heating jacket 3
Is provided with a level meter 16 for measuring the liquid levels of the brines 5a and 8a, and the brine return pump 34 and the vacuum pump 36 are controlled so that the liquid levels are set to predetermined target values.

The operation of the second embodiment configured as described above will be described. At the time of ozone adsorption, first, the refrigerator 6 is operated to cool the cold brine 5a to a predetermined temperature, for example, -30 ° C., the stop valve 40 of the cold brine supply line 31 is opened, and the stop valve 41 of the warm brine supply line 32 is opened. Is closed, the stop valve 44 of the suction pressurizing line 35 is opened, and the vacuum pump 36 is operated to suck the cold brine 5 a into the cooling and heating jacket 3. When the level meter 16 reaches the target value, the stop valve 42 of the brine return line 33 is opened, the stop valve 43 is closed, and the brine return pump 34 is operated. The vacuum pump 36 and the brine return pump 34 are operated so that the measured value of the level meter 16 maintains a target value. In this state, an oxygen gas containing ozone is supplied from the ozone generator from the gas inlet 1a of the adsorption tower 1, the ozone is adsorbed by the ozone adsorbent 2, and the oxygen is discharged from the gas outlet 1b and returned to the ozone generator.

When the ozone adsorption step is completed, the vacuum pump 36 is switched to pressurization, the stop valve 40 is closed, the brine return pump 34 is set to the maximum capacity, and the cooling and heating jacket 3 is prepared for the next ozone desorption step. Cold brine 5a
Is quickly returned to the cold brine tank 5. When the return of the cold brine 5a is completed, the vacuum pump 36 and the brine return pump 34 are stopped, the stop valve 42 of the brine return line 33 is closed, and the process is ready for the next ozone desorption step.

In the ozone desorption step, first, the heater 9 is operated to supply high-temperature water to the heating pipe 9a to heat the hot brine 8a. When the temperature of the warm brine 8a reaches a predetermined temperature, for example, 40 ° C., the stop valve 41 of the warm brine supply line 32 is opened, and the vacuum pump 36 of the suction / pressurization line 35 is operated to put the warm brine 8a on the cooling and heating jacket 3. Suction.
When the measured value of the level meter 16 reaches the target value, the stop valve 43 of the brine return line 33 is opened, and the brine return pump 3
Run 4 Vacuum pump 36 and brine return pump 3
4 is operated so that the measured value of the level meter 16 maintains the target value. In this state, a carrier gas such as nitrogen is supplied from the gas inlet 1a of the adsorption tower 1, and is taken out from the gas outlet 1b together with ozone desorbed from the ozone adsorbent 2 and sent to the supply destination. When the ozone desorption step is completed, the vacuum pump 36 is switched to pressurization and the stop valve 41 of the hot brine supply line 32 is closed in preparation for the next ozone adsorption step,
By setting the brine return pump 34 to the maximum capacity, the warm brine 8 a of the cooling and heating jacket 3 is quickly returned to the warm brine tank 8. When the return of the warm brine 8a is completed, the vacuum pump 36 and the brine return pump 34 are stopped, the stop valve 43 of the brine return line 33 is closed, and the next ozone desorption step is prepared.

In the second embodiment, it is possible to switch the vacuum pump 36 to a pressurizing pump and discharge brine from the cooling and heating jacket 3 more quickly than in the first embodiment by natural fall. By operating the pump 34 at the same time, the pump 34 can be discharged in a shorter time.

[0025]

As is apparent from the above description, the present invention has one jacket for cooling and heating the ozone adsorbent, supplies cold brine from the cold brine tank when adsorbing ozone, and supplies warm brine when desorbing ozone. Provides more warm brine, but eliminates one brine before supplying the other brine, preventing one brine from cooling or heating the other, thus extending cooling or heating time Without this, the cooling or heating efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a first embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Adsorption tower 1a Gas inlet 1b Gas outlet 2 Ozone adsorbent 3 Cooling / heating jacket 3a Top plate 3b Bottom plate 4 Cold brine supply device 5 Cold brine tank 5a Cold brine 6 Refrigerator 6a Cooling pipe 7 Hot brine supply device 8 Hot brine tank 8a Temperature Brine 9 Heater 9a Heating tube 11 Brine supply line 12 Cold brine return line 13 Hot brine return line 14 Brine supply pump 15 Supply / exhaust line 16 Level gauge 20-24 Stop valve 31 Cold brine supply line 32 Hot brine supply line 33 Brine return Line 34 Brine return pump 35 Suction / pressurization line 36 Vacuum pump 40-44 Stop valve

Claims (4)

[Claims] 1. An ozone adsorption / desorption apparatus which cools the ozone adsorbent into an adsorption tower filled with the ozone adsorbent, adsorbs ozone through a gas containing ozone, and heats the ozone adsorbent to desorb ozone. A cooling and heating jacket that includes the adsorption tower, cools with a cold brine and heats with a warm brine, a cold brine supply device that supplies a cold brine to the cooling and heating jacket, and a warm brine to the cooling and heating jacket. A hot brine supply device for supplying, a brine supply line for supplying cold brine from the cold brine supply device to the cooling and heating jacket, and supplying a hot brine from the warm brine supply device; A cold brine return line returning to the brine supply device, and a warm brine from the cooling / heating jacket. A cooling and heating device for an ozone adsorption / desorption device, comprising: a hot brine return line for returning to a brine supply device; and a supply / exhaust line provided at the top of the cooling and heating jacket for flowing air. 2. Cooling and heating of an ozone adsorption / desorption apparatus which cools the ozone adsorbent into an adsorption tower filled with the ozone adsorbent, adsorbs ozone through a gas containing ozone, and heats the ozone adsorbent to desorb ozone. A cooling and heating jacket that includes the adsorption tower, cools with a cold brine and heats with a warm brine, a cold brine supply device that supplies a cold brine to the cooling and heating jacket, and a warm brine to the cooling and heating jacket. A hot brine supply device, a cold brine supply line for supplying cold brine from the cold brine supply device to the cooling and heating jacket, and a hot brine supply line for supplying warm brine from the warm brine supply device to the cooling and heating jacket. The cold brine is returned from the cooling and heating jacket to the cold brine supply device, and the hot brine is cooled to the hot brine. A cooling and heating device for an ozone adsorption / desorption device, comprising: a brine return line for returning to a brine supply device; and a suction / pressurization line provided at the top of the cooling and heating jacket for sucking and pushing air. 3. The cooling and heating device for an ozone adsorption / desorption device according to claim 2, wherein a brine discharge pump is provided in the brine return line. 4. The cooling and heating device for an ozone adsorption / desorption device according to claim 1, wherein the cold brine and the warm brine are made of the same substance.