JP4414287B2 - Absorber activation device - Google Patents

Description

  The present invention relates to an absorbent activating device that activates an absorbing solution that has absorbed impurities in a desulfurizing device by an electrodialyzer equipped with an ion exchange membrane. In particular, the desulfurizing device and the electrodialyzer are connected by a pipe line. The present invention relates to an absorption liquid activation device.

  Normally, when fuel such as coal or heavy oil containing sulfur is gasified, the sulfur is contained in the generated gas as hydrogen sulfide, etc., and therefore this hydrogen sulfide is removed by a desulfurization unit. ing. This desulfurization apparatus desulfurizes the generated gas using a basic aqueous solution that reacts with the hydrogen sulfide as an absorbing liquid.

  Then, the absorption liquid that has absorbed the hydrogen sulfide is decomposed and regenerated by a regeneration means, and returned to the desulfurization apparatus to desulfurize the product gas. However, while the absorption liquid is repeatedly used, In addition, impurities that are not decomposed by the regeneration means are formed, and there is a problem that the desulfurization performance is lowered.

  Therefore, in order to activate the absorption liquid and allow desulfurization to be performed again in the desulfurization apparatus, the deteriorated absorption liquid is passed through an electrodialysis apparatus to separate impurities.

  A technique that seems to be related to the above-described conventional technique is disclosed in Patent Document 1.

Japanese Patent Laid-Open No. 55-81882 (FIG. 2 and explanation thereof)

  In the above prior art, no consideration is given to an increase in the viscosity of the absorbent due to a decrease in temperature, and the electrodialyzer may be damaged. That is, the absorption liquid supplied from the desulfurizer to the electrodialyzer during the operation of the desulfurizer is about 40 ° C. An electrodialyzer designed on the premise that an absorbing liquid having such a temperature is supplied is the operation of the desulfurization apparatus is stopped, the temperature of the absorbing liquid is reduced, or the absorbing liquid is reduced as the environmental temperature decreases. When the viscosity of the liquid increases, the pressure loss in the absorption liquid channel increases, which may reduce the activation efficiency or damage the ion exchange membrane of the electrodialyzer.

  On the other hand, an electrodialyzer is designed with an increased diameter of piping, etc., serving as an absorption liquid flow path in anticipation of an increase in the viscosity of the absorption liquid due to a decrease in the temperature of the absorption liquid and a decrease in the environmental temperature when the desulfurization apparatus is stopped. It is also possible. In this way, it is possible to prevent an increase in pressure loss in the absorption liquid channel, but it is still impossible to prevent damage to the ion exchange membrane of the electrodialysis apparatus due to an increase in the viscosity of the absorption liquid due to a decrease in temperature.

  An object of the present invention is to provide an absorbent activating device that can activate an absorbent without damaging an ion exchange membrane of an electrodialyzer even when the temperature is lowered.

  In order to achieve the above object, the present invention adjusts the viscosity of the absorbing solution by the absorbing solution viscosity adjusting means when supplying the absorbing solution that has absorbed impurities by the desulfurizer to the electrodialyzer.

  According to the above configuration, even if the desulfurization apparatus stops operation and the temperature of the absorbing liquid decreases and the viscosity increases, or the viscosity increases due to a decrease in the temperature of the absorbing liquid accompanying a decrease in the surrounding environmental temperature. Since the viscosity of the absorbent supplied to the electrodialyzer is adjusted in the temperature rising direction by the absorbent viscosity adjusting means, the absorbent can be activated without damaging the ion exchange membrane of the electrodialyzer. It is.

  According to the present invention, it is possible to provide an absorbent activating device that can activate an absorbent without damaging the ion exchange membrane of the electrodialyzer even when the temperature is lowered.

  A first embodiment according to the present invention will be described below based on an absorbent activation device shown in FIG.

  The absorbent activation device according to the present invention is roughly provided with an electrodialysis apparatus 1 and a desulfurization apparatus 26.

  The electrodialysis apparatus 1 includes an electrodialysis tank 2 configured such that a cation exchange membrane and an anion exchange membrane are alternately arranged and a DC voltage is applied to both ends. The electrodialysis tank 2 is divided into a desalting chamber 3 and a concentration chamber 4 by the ion exchange membrane.

  Pipes 7 a and 7 b connected to a desalting solution pot 5 and having a desalting solution pump 6 interposed are connected to the inlet of the desalting chamber 3. One end of a desalting chamber outlet pipe 8 is connected to the outlet of the desalting chamber 3, and the other end is connected to the desalting solution pot 5 via a desalting solution circulation valve 9 and a desalting solution return pipe 10. Has been. The desalting chamber outlet pipe 8 is branched from between the desalting chamber 3 and the desalting liquid circulation valve 9, and passes through the desalting liquid discharge pipe 11 provided with the desalting liquid discharge valve 12. The storage tank 13 is connected. The desalted liquid pot 5 has a first pure water supply pipe 15 provided with a first pure water supply valve 14 which serves as an absorbent concentration reducing means for reducing the concentration of the absorbent and is also a pure water supply means. It is connected.

  Concentrate pipes 17 a and 17 b connected to the concentrate pot 16 and having a concentrate pump 18 interposed are connected to the inlet of the concentrate chamber 4. To the outlet of the concentrating chamber 4, a concentrating chamber outlet pipe 19 extending to the concentrated liquid pot 16 is connected. A second pure water supply pipe 21 provided with a second pure water supply valve 20 is connected to the concentrate pot 16, and a concentrate discharge pipe 22 leading to the waste pit 23 is further connected. A waste liquid discharge pipe 24 a is connected from the waste liquid pit 23, and further connected to the outside via a waste liquid pump 25 by a waste liquid discharge pipe 24 b.

  On the other hand, the desulfurization device 26 includes an absorption tower 27 and a regeneration tower 28, and a production gas supply pipe 29 and a purified gas discharge pipe 30 are connected to the absorption tower 27. From the bottom of the absorption tower 27, a regeneration tower absorption liquid supply pipe 31 is connected to the regeneration tower 28 via an absorption liquid heat exchanger 32 and a regeneration tower absorption liquid supply valve 33. An acid gas discharge pipe 34 is connected to the top of the regeneration tower 28, and from the bottom via an absorption liquid circulation pump 35, an absorption liquid heat exchanger 32, an absorption liquid cooler 36, and an absorption tower inlet absorption liquid control valve 37. An absorption tower absorption liquid supply pipe 38 reaching the absorption tower 27 is connected.

  Between the absorption liquid cooler 36 of the desulfurization apparatus 26 and the absorption tower inlet absorption liquid control valve 37, an absorption liquid supply pipe 40 provided with an electrodialysis apparatus supply cutoff valve 39 is branched, and the absorption liquid supply pipe 40 is It is connected to the desalted absorption liquid storage tank 13. The desalted absorption liquid storage tank 13 is partitioned into two chambers so as to separate the absorption liquid before activation and the absorption liquid after activation. Further, from the desalted absorption liquid storage tank 13, a treatment liquid return pipe 43 provided with a treatment liquid pump 41 and a treatment liquid control valve 42 is connected to an absorption tower absorption liquid supply pipe 38 piped from the bottom of the regeneration tower 28. Has been.

  From the desalted absorption liquid storage tank 13, a stock solution supply pipe 49 provided with a stock solution pump inlet pipe 44, a stock solution pump 45, a stock solution filter inlet pipe 46, a stock solution filter 47 and a stock solution supply valve 48 is desalted of the electrodialysis apparatus 1. Connected to the liquid pot 5.

  A stock solution circulation pipe 51 provided with a stock solution filter circulation valve 50 is branched between the stock solution filter 47 and the stock solution supply valve 48, and the stock solution circulation pipe 51 is connected to the desalted absorbent storage tank 13. From the outlet of the stock solution pump 45, a stock solution heater inlet pipe 52 is branched and connected to a stock solution heater 53 which constitutes a temperature adjusting means of the absorption liquid viscosity adjusting means. The outlet pipe of the stock solution heater 53 is connected to a stock solution circulation pipe 51 that reaches the desalted absorption liquid storage tank 13.

  In the absorption liquid activating apparatus having the above-described configuration, the desulfurization apparatus 26 supplies the product gas containing hydrogen sulfide to the absorption tower 27 from the production gas supply pipe 29 and passes through the absorption tower inlet absorption liquid control valve 37 in the absorption tower 27. The hydrogen sulfide is chemically absorbed by the absorbing liquid by contacting with the supplied absorbing liquid. The purified gas desulfurized by separating hydrogen sulfide is supplied to the outside through the purified gas discharge pipe 30.

  The absorption liquid that has absorbed hydrogen sulfide and the like is discharged from the absorption tower 27 through the regeneration tower absorption liquid supply pipe 31 and is exchanged with the high-temperature absorption liquid discharged from the regeneration tower 28 by the absorption liquid heat exchanger 32. , The pressure is reduced by the regeneration tower inlet absorbing liquid control valve 33 and supplied to the regeneration tower 28. In the regeneration tower 28, the temperature of the absorbing solution is further increased by decompression and external heating, and the acidic gas in the absorbing solution is separated from the absorbing solution. It is discharged to an external processing device through the separated acid gas discharge pipe 34. The absorption liquid regenerated by separating the acid gas is discharged from the bottom of the regeneration tower 28 through the absorption tower absorption liquid supply pipe 38, boosted by the absorption liquid circulation pump 35, and absorbed by the absorption liquid heat exchanger 32. It is cooled by the low temperature absorption liquid from. The regenerated absorption liquid that has passed through the absorption liquid heat exchanger 32 is further cooled by an absorption liquid cooler 36, supplied to the absorption tower 27 through the absorption tower inlet absorption liquid control valve 37, and again used for desulfurization of the product gas.

  On the other hand, in the electrodialysis tank 2 of the electrodialyzer 1, the concentrate (pure water) in the concentrate pot 16 is sent to the concentration chamber 4 through the concentrate pipes 17 a and 17 b by the concentrate pump 18. The absorbing solution in the desalting solution pot 5 is sent to the desalting chamber 3 through the desalting solution pipes 7 a and 7 b by the desalting solution pump 6. When a DC voltage is applied to the electrodes installed at both ends of the electrodialysis tank 2 in a state where the desalting chamber 3 and the concentration chamber 4 are filled in this way, the anions and cations in the desalting solution are caused by the current. Selectively permeates the ion exchange membrane and moves to the concentrate. Thereby, ionic impurities are removed from the absorption liquid in the desalting chamber 3, the impurities move to the concentrated liquid in the concentration chamber 4, and the absorption liquid is activated. The concentrated liquid containing impurities in the concentrating chamber 4 is returned from the concentrating chamber outlet pipe 19 to the concentrated liquid pot 16, and a part of the concentrated liquid is discharged from the concentrated liquid pot 16 through the concentrated liquid discharge pipe 22 to the waste liquid pit 23 and is constant. After the amount is stored, it is discharged to the outside by the waste liquid pump 25 from the waste liquid discharge pipes 24a and 24b. Pure water is supplied to the concentrate pot 16 from the second pure water supply valve 20 through the second pure water supply pipe 21 to supplement the discharged concentrated water.

  When absorption and regeneration are repeated in the desulfurization device 26 and impurities such as heat stable amine salts and ionic impurities are generated in the absorption liquid, the electrodialysis apparatus supply shut-off valve 39 is opened and the absorption liquid supply pipe 40 is passed through. The absorption liquid in the regeneration tower 28 is discharged to the desalted absorption liquid storage tank 13. When the pressure of the absorption liquid discharged from the desulfurization apparatus 26 and the operating pressure of the electrodialysis apparatus 1 are different, it is possible to adjust the pressure in the demineralized absorption liquid storage tank 13.

  By the way, in this Embodiment, the desalination absorption liquid storage tank 13 is divided into two chambers so that the absorption liquid before activation and the absorption liquid after activation are stored in the same container and separated. Thus, although there is a disadvantage that the absorption liquid before activation and the absorption liquid after activation are mixed, it is possible to equalize the absorption liquid supplied to the electrodialyzer 1 and the collected absorption liquid.

  The absorption liquid in the desalted absorption liquid storage tank 13 is discharged from the raw liquid pump inlet pipe 44 and is sent by the raw liquid pump 45 to the raw liquid filter 47 through the raw liquid filter inlet pipe 46, where solid matter in the absorption liquid Isolate. The absorption liquid from which the solid matter has been separated passes through the stock solution supply pipe 49 and is supplied from the stock solution supply valve 48 to the desalted solution pot 5.

  The absorption liquid desalted and activated in the desalting chamber 3 passes through the desalting chamber 3, the desalting chamber outlet pipe 8, the desalting liquid discharge pipe 11, and the desalting liquid discharge valve 12. Is discharged.

  The treatment method of the absorption liquid is a system in which the absorption liquid is supplied to the desalination chamber outlet pipe 8 of the electrodialysis apparatus 1 and is divided into three methods of a continuous type, a partial circulation type, and a batch type.

  In the continuous processing method, the desalin solution circulation valve 9 is used so that the absorbent supplied from the desalin solution pot 5 to the desalting chamber 3 is recovered in the desalted solution storage tank 13 immediately after being desalted. Is closed and the desalinating liquid discharge valve 12 is opened. Therefore, the absorbing solution passes through the desalting chamber 3 only once and is desalted.

  In the partial circulation type processing method, a part of the absorption liquid exiting the desalting chamber 3 is collected in the desalting absorption liquid storage tank 13 through the desalting liquid discharge valve 12, and the remaining part is passed through the desalting liquid circulation valve 9. Is recovered in the desalting solution pot 5. Part of the desalted liquid is mixed with the untreated absorption liquid in the desalting liquid pot 5 and supplied again to the desalting chamber 3 by the desalting liquid pump 6, which is repeated.

  In the batch processing method, the desalin solution discharge valve 12 of the desalin solution discharge pipe 11 is closed, and the entire amount of the absorbing solution exiting the desalting chamber 3 is recovered in the desalin solution pot 5 through the desalin solution circulation valve 9. Then, a circulation operation is performed in which the desalting liquid pump 6 supplies the desalting chamber 3 again. Thereafter, the desalted liquid circulation valve 9 is closed, and the desalted absorbent is recovered in the desalted absorbent storage tank 13 through the desalted liquid discharge valve 12 of the desalted liquid discharge pipe 11.

  In the present embodiment, any of the above processing methods can be applied.

  By the way, when the desulfurization device 26 is in operation, the liquid temperature of the absorption liquid supplied to the demineralized absorption liquid storage tank 13 through the absorption liquid supply pipe 40 is about 40 ° C., and the absorption liquid has a low viscosity. The desalin chamber 3 is supplied by the stock solution pump 45 to the desalted solution pot 5 through the stock solution filter 47, the stock solution supply pipe 49, and the stock solution supply valve 48, and further easily passed through the desalin solution pipes 7 a and 7 b and the desalin solution pump 6. And can be desalted without difficulty.

  However, when the desulfurization device 26 is stopped and the temperature of the absorbing liquid is lowered, the viscosity of the absorbing liquid is high, and therefore, if this absorbing liquid is supplied to the demineralization chamber 3, the ion exchange membrane is damaged. I will let you. In this case, the stock solution supply valve 48 and the stock solution filter circulation valve 50 are closed, and the absorbent in the desalted absorbent storage tank 13 is supplied to the stock solution heater 53 through the stock solution heater inlet pipe 52 by the stock solution pump 45. In the stock solution heater 53, the absorbent is heated by an external heat source such as electricity or steam. The heated absorbent is recovered in the desalted absorbent storage tank 13 through the stock solution circulation pipe 51 closer to the desalted absorbent storage tank 13 than the stock filter circulation valve 50. By this absorption liquid heating and circulation operation, the temperature of the absorption liquid in the raw liquid pump inlet pipe 44 is raised, and the temperature of the pipes including the desalted absorption liquid storage tank 13 and the raw liquid pump inlet pipe 44 is raised. Then, after the temperature of the absorption liquid has risen above the set temperature, the stock solution filter circulation valve 50 is opened, and a portion of the rise in the temperature of the absorption liquid is passed through the stock solution filter inlet pipe 46 and the stock solution filter 47 to raise the temperature of the stock solution filter 47. To do. The absorbing solution exiting the stock solution filter 47 passes through the stock solution supply pipe 49 and the stock solution circulation pipe 51 and is collected in the desalted absorption liquid storage tank 13. In this process, the stock solution supply pipe 49 and the stock solution circulation pipe 51 are heated.

  After the temperature of the outlet portion of the stock solution supply pipe 49 has been sufficiently raised, the stock solution supply valve 48 is opened and the heated absorbent is supplied to the desalting solution pot 5 to be supplied to the desalting chamber 3. The temperature of the absorbing liquid can be increased.

  When the electrodialyzer 1 is stopped, the desalted solution pump 6 collects the absorbing solution in the desalted absorbing solution storage tank 13 through the desalting chamber 3, the pipe 8 and the desalted solution discharge pipe 11, and the desalted solution pot 5. Minimize the absorption liquid remaining inside. Thereafter, the first pure water supply valve 14 is opened to supply pure water into the desalting solution pot 5, and pure water is supplied from the desalting solution pump 6 to the desalting chamber 3, so that the absorbent in the system is purified water. Replenish with.

  Thereby, even when a low-temperature absorption liquid is supplied to the desalting liquid pot 5, the concentration of the absorption liquid is reduced by mixing with pure water in the system of the desalting chamber 3, and the viscosity of the absorption liquid can be kept low. Therefore, even if the absorbing solution is supplied to the desalting chamber 3 when the operation of the electrodialysis apparatus 1 is resumed, the ion exchange membrane is not damaged.

  By the way, normally, when the absorption liquid heated from the desalination absorption liquid storage tank 13 is sequentially supplied to the desalination liquid pot 5, the concentration of the absorption liquid increases, but the absorption liquid temperature also rises, so the viscosity of the absorption liquid is increased. It can be kept low.

In the present embodiment, the supply line for supplying the absorption liquid from the desulfurization apparatus 26 to the electrodialysis apparatus 1 is the absorption liquid supply pipe 40 -the electrodialysis apparatus supply cutoff valve 39 -the desalted absorption liquid storage tank 13 -the stock solution pump. Inlet piping 44-Stock solution pump 45-Stock solution filter inlet piping 46-Stock solution filter 47-Stock solution supply piping 49-Stock solution supply valve 48-Desalted solution pot 5-Desalted solution pipe 7a-Desalted solution pump 6-Desalted solution piping 7b, and the recovery line for collecting the absorption liquid from the electrodialysis apparatus 1 to the desulfurization apparatus 26 is a desalination chamber outlet pipe 8-a desalination liquid discharge pipe 11-a desalination liquid discharge valve 12-a desalination absorption liquid storage tank. 13-Processing liquid pump 41-Processing liquid control valve 42-Processing liquid return pipe 43 As described above, according to the present embodiment, the desulfurization device 26 stops operating and the temperature of the absorbing liquid decreases. Even if the viscosity increases or Even if the viscosity increases due to a decrease in the temperature of the absorbent due to a decrease in the ambient temperature of the side, the viscosity of the absorbent supplied to the electrodialysis apparatus 1 is increased in the temperature rising direction by the stock solution heater 53 serving as the absorbent viscosity adjusting means. Adjusted. In addition, when the electrodialysis apparatus 1 is stopped, pure water can be supplied to reduce the concentration of the absorption liquid to reduce the viscosity of the absorption liquid, so that the ion exchange membrane of the electrodialysis apparatus 1 can be absorbed without damage. The liquid can be activated.

  Next, a second embodiment according to the present invention will be described with reference to FIG. In the present embodiment, the difference from the first embodiment is that pure water constituting pure water supply means is used in place of the first pure water supply valve 14 connected to the desalting solution pot 5 in FIG. The heater 54 and the hot water flow rate control valve 55 are installed, and the hot water flow rate control valve 55 is controlled by the detected pressure of the desalting chamber pressure gauge 56 which is a pressure detecting means provided in the electrodialysis tank 2. . The pure water heater 54 also functions as an absorbing liquid viscosity adjusting means, an absorbing liquid concentration reducing means, a pure water supplying means, and a temperature adjusting means for adjusting the temperature of the absorbing liquid.

  In the present embodiment, as in the first embodiment, the absorption liquid supplied to the desalted absorption liquid storage tank 13 is circulated and heated by the raw liquid pump 45 through the raw liquid heater 53, and then the raw liquid filter inlet. The piping 46, the stock solution filter 47, the stock solution circulation piping 51, and the stock solution filter circulation valve 50 are circulated to the desalted absorption liquid storage tank 13, and the piping including the stock solution filter 47 and the stock solution filter inlet piping 46 is heated. Thereafter, the absorbing solution is supplied from the stock solution supply valve 48 to the desalting solution pot 5 and sent to the desalting chamber 3 by the desalting solution pump 6.

  Further, in the present embodiment, when the temperature of the absorbent supplied to the desalting solution pot 5 decreases for some reason, the viscosity increases as the temperature of the absorbent decreases and the pressure loss increases. 2 is detected by the pressure of the demineralization chamber pressure gauge 56 provided in FIG. The pure water heater 54 and the hot water flow rate control valve 55 are controlled by the detection signal of the desalination chamber pressure gauge 56, and the temperature of the pure water from the first pure water supply pipe 15 is raised appropriately. The pure water is supplied to the desalting solution pot 5.

  By supplying an appropriate amount of pure water that has been heated to the desalting solution pot 5, the concentration of the absorbing solution in the desalting solution pot 5 is moderately reduced, and at the same time the viscosity of the absorbing solution is reduced due to the decrease in the concentration of the absorbing solution. The temperature of the absorbing liquid also increases due to the heated pure water, and the absorbing liquid viscosity decreases.

  As described above, according to the present embodiment, the same effect as that of the first embodiment can be obtained, and the appropriate viscosity can be applied to the electrodialysis apparatus 1 regardless of the temperature drop of the absorbent in the desalinating solution pot 5. The absorption liquid can be supplied to activate the absorption liquid.

  FIG. 3 shows a third embodiment according to the present invention, which is different from the first embodiment in that a desalted liquid tank 57 and a post-treatment desalted liquid are used instead of the desalted absorbent storage tank 13. This is the point where the tank 58 is installed. Then, the absorbent is supplied from the desulfurizer 26 to the electrodialyzer 1 by connecting the absorbent supply pipe 40 to the desalted liquid tank 57 and connecting the desalted liquid discharge pipe 11 to the desalted liquid tank 58 after processing. The system to be recovered and the system to be recovered were separated.

  The desalinating solution tank 57 is provided with a desalting solution heater 59, and the undiluted solution is fed from a undiluted solution supply pipe 49 extending from the desalting solution tank 57 through the undiluted solution pump 45 and the undiluted solution filter 47 to the desalted solution pot 5. The circulation pipe 51 is branched, and the stock solution circulation pipe 51 is returned to the desalted liquid tank 57.

  Further, the desalinating solution discharge pipe 11 branched from the desalting chamber outlet pipe 8 of the desalting chamber 3 and provided with the desalting solution discharge valve 12 is connected to a post-treatment desalting solution tank 58.

  The absorbent that needs to be activated is supplied from the desulfurization device 26 to the desalted liquid tank 57 through the absorbent supply pipe 40. In the desalinating solution tank 57, the temperature of the absorbent is increased by a desalting solution heater 59. The absorption liquid whose temperature has been raised is sent to the stock solution filter 47 by the stock solution pump 45 and is circulated through the stock solution filter circulation valve 50 and returned to the desalted solution tank 57. The temperature of the stock solution pump inlet pipe 44, the stock solution filter inlet pipe 46, the stock solution supply pipe 49, etc. is raised by such a circulation operation, and then sent to the desalting solution pot 5 of the electrodialysis apparatus 1. The absorption liquid activated by the electrodialysis apparatus 1 passes through the desalting liquid discharge pipe 11 and is recovered in the desalting liquid tank 58 after being processed, and then recovered in the desulfurization apparatus 26 by the processing liquid pump 41.

  According to the present embodiment, the same effects as those of the first embodiment can be obtained, and the piping before the pump that supplies the absorption liquid to the electrodialysis apparatus 1 can also be heated from the start. In addition, since the absorption liquid supply system and the recovery system are separated, the absorption liquid before activation and the absorption liquid after activation are not mixed, so that the efficiency of activation is improved.

The piping diagram which shows 1st Embodiment of the absorption liquid activation apparatus by this invention. The piping diagram which shows 2nd Embodiment of the absorption liquid activation apparatus by this invention. The piping diagram which shows 3rd Embodiment of the absorption liquid activation apparatus by this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Electrodialysis apparatus, 2 ... Electrodialysis tank, 3 ... Desalination humidity, 4 ... Concentration chamber, 5 ... Desalination liquid pot, 6 ... Desalination liquid pump, 13 ... Desalination absorption liquid storage tank, 14 ... 1st Pure water supply valve, 26 ... desulfurization device, 53 ... active heater, 54 ... pure water heater, 59 ... desalted liquid heater.

Claims (9)

In an absorbent activating device that activates an absorbent that has absorbed impurities in a desulfurizer using an electrodialyzer equipped with an ion exchange membrane, the viscosity of the absorbent supplied to the electrodialyzer changes the temperature change of the absorbent. An absorbent activating device, characterized in that an absorbent viscosity adjusting means for adjusting according to the above is provided. Supply of supplying absorption liquid absorbing impurities from the desulfurization apparatus to the electrodialysis apparatus in an absorption liquid activation apparatus that activates the absorption liquid that has absorbed impurities in the desulfurization apparatus by an electrodialysis apparatus equipped with an ion exchange membrane. A pipe and a recovery pipe for returning the activated absorption liquid from the electrodialysis apparatus to the desulfurization apparatus, and the viscosity of the absorption liquid supplied to the electrodialysis apparatus according to the temperature change of the absorption liquid An absorbent activation device comprising an absorbent viscosity adjusting means for adjusting.   The absorbing liquid activation device according to claim 1 or 2, wherein the absorbing liquid viscosity adjusting means is a temperature adjusting means for adjusting the temperature of the absorbing liquid.   The absorption liquid activation device according to claim 1 or 2, wherein the absorption liquid viscosity adjusting means is absorption liquid concentration lowering means for reducing the concentration of the absorption liquid supplied to the electrodialyzer.   5. The absorbent activation device according to claim 4, wherein the absorbent concentration reducing means is a pure water supply means for supplying pure water to the absorbent supplied to the electrodialyzer.   6. The absorption liquid activating device according to claim 5, wherein the pure water supply means includes temperature adjusting means for adjusting a temperature rise of pure water.   Supplying the absorption liquid that has absorbed impurities from the desulfurization apparatus to the electrodialysis apparatus in an absorption liquid activation apparatus that activates the absorption liquid that has absorbed impurities in the desulfurization apparatus by an electrodialysis apparatus equipped with an ion exchange membrane. A conduit and a recovery conduit for returning the activated absorbent from the electrodialyzer to the desulfurizer, and a pressure detector for detecting the pressure of the absorbent supplied to the electrodialyzer, An absorbent activation device comprising an absorbent viscosity adjusting means for adjusting the viscosity of the absorbent based on a value detected by the pressure detecting means. In an absorption liquid activation device that activates an absorption liquid that has absorbed impurities by a desulfurization apparatus by an electrodialysis apparatus having an ion exchange membrane, the supply liquid that supplies the absorption liquid from the desulfurization apparatus to the electrodialysis apparatus is in the middle A storage tank for temporarily storing the absorption liquid, and an absorption liquid heating circuit for sending the absorption liquid in the storage tank out of the storage tank and returning it to the storage tank in response to a temperature change of the absorption liquid. An absorbent activation device characterized by that. In an absorption liquid activation device that activates an absorption liquid that has absorbed impurities by a desulfurization apparatus by an electrodialysis apparatus having an ion exchange membrane, the supply liquid that supplies the absorption liquid from the desulfurization apparatus to the electrodialysis apparatus is in the middle A storage tank for temporarily storing the absorption liquid, and an absorption liquid temperature increasing circuit for raising the temperature of the absorption liquid in the storage tank outside the storage tank and returning it to the storage tank according to a temperature change of the absorption liquid. In addition, an absorbent activation device characterized by comprising pure water supply means for supplying pure water to the absorbent supplied to the electrodialyzer.

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