JP2009243751A - Liquid chemical supply apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To avoid uselessly supplying a liquid chemical to cooling water in a liquid chemical supply apparatus. <P>SOLUTION: The liquid chemical supply apparatus 20 operated by generated power of a solar panel 21 includes a first detecting means for detecting a generation voltage value of the solar panel 21, and a second detecting means for detecting operation of a cooling tower 10, for example, a vibration sensor 27. A liquid chemical supply timing is determined by a signal detected by the detecting means and a timer incorporated in the liquid chemical supply apparatus 20, and the liquid chemical is supplied to the cooling water. An intermediate period during which a water treatment agent is supplied to the cooling water when the cooling tower 10 is stopped is eliminated, and useless consumption of the water treatment agent can be avoided. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a chemical solution supply apparatus capable of supplying a chemical solution to circulating water for cooling such as a cooling tower used in an absorption refrigerator or a chiller.

In the conventional chemical solution supply apparatus, in order to suppress the generation of algae and the like generated in the cooling circulating water such as a cooling tower, the chemical supply that supplies the chemical solution to the cooling circulating water periodically or as necessary The device is known. In such a chemical solution supply apparatus, it has been proposed to detect the residual halogen concentration or detect the illuminance by sunshine to adjust the supply of the chemical solution to avoid excessive chemical solution supply. (For example, see Patent Document 1)
JP 2005-218936 A

  However, in such a chemical solution supply device, particularly during an intermediate period such as spring or autumn, if the device is not stopped, the chemical solution supply is automatically performed even if the cooling tower is stopped. However, there was a problem that wasteful chemicals would be consumed, and improvements were required.

  Therefore, the present invention has been made to solve such problems, and detects the operation of a device such as a cooling tower to which the chemical solution supply apparatus is connected, and supplies the chemical solution while the device is stopped. The chemical solution supply apparatus which can prevent generation | occurrence | production of algae etc. is provided, supplying the said chemical solution efficiently.

  A first invention includes a solar panel and a power storage unit that charges the power generated by the solar panel, and the power from the solar panel or the power from the power storage unit serves as cooling water for cooling the cooling tower. In the chemical solution supply apparatus capable of supplying a chemical solution, the chemical solution supply device includes first detection means for detecting that either the cooling tower or a cooling water pump that circulates the cooling water to the cooling tower is in operation. Control means for supplying a chemical to the circulating water for cooling based on an input signal from the first detection means is provided.

  In a second aspect based on the first aspect, the control means includes second detection means for detecting a voltage value of the generated power of the solar panel, and whether the charging voltage of the power storage unit is within an operable range. Third detection means for detecting whether or not, and based on an input signal from the first means and a signal input from at least one of the second detection means or the third detection means, the cooling It is comprised so that the chemical | medical solution supply to the circulating water for operation may be performed.

  According to a third invention, in the first or second invention, the first detection means is a vibration sensor that detects vibration during operation of either the cooling tower or the cooling water pump, and the cooling tower Alternatively, the cooling water pump is provided in a portion where vibration during operation can be detected.

  According to this invention, it is confirmed that the power supply from the solar panel and the power storage unit is within the voltage range in which the chemical solution supply device can operate, and the operation state of the cooling tower, the cooling water pump, etc. by the first detection means is confirmed. However, when the cooling tower and the cooling water pump are stopped, the supply of the chemical solution is not performed, so that an unnecessary supply of the excessive chemical solution is prevented and an efficient supply of the chemical solution is performed. It will be something that can be made.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  First, FIG. 1 is a configuration diagram showing a configuration in which a chemical solution supply apparatus to which the present invention is applied is used in a cooling tower of an absorption refrigerator.

  First, the absorption refrigerator 100 uses a lithium bromide (LiBr) solution containing water as a refrigerant as an absorption liquid, and heats and boiles the absorption liquid (a rare absorption liquid) by heating with a burner B or the like in the high-temperature regenerator 1. And evaporating and separating the refrigerant from the absorption liquid. The refrigerant vapor evaporated and separated in the high-temperature regenerator 1 flows through the refrigerant pipe 6, passes through the low-temperature regenerator 2, heats an intermediate absorption liquid described later, and is sent to the condenser 3. In the condenser 3, it is cooled by the cooling water circulating in the cooling water pipe 8 to become a refrigerant liquid, and is sent from the bottom of the condenser 3 to the evaporator 4. In the evaporator 4, the refrigerant liquid condensed and liquefied by the condenser 3 is dispersed in the cold water pipe 9 of the refrigerant pump P 1, and absorbs heat from the brine that flows through the cold water pipe 9 and is supplied to a load (not shown). Then, it evaporates again and is sent to the absorber 5. In this absorber 5, it is cooled by the cooling water circulating in the cooling water pipe 8, and is again condensed and liquefied, to the concentrated absorbent supplied from the low-temperature regenerator 2 described later via the low-temperature heat exchanger 6. The concentrated absorption liquid is absorbed and absorbs the refrigerant vapor in the absorber 5 to become a rare absorption liquid. By the operation of the absorption liquid pump P2, the high-temperature absorption liquid passes through the low-temperature heat exchanger 6 and the high-temperature heat exchanger 7. It circulates to the regenerator 1.

  Then, the absorption liquid obtained by evaporating and separating the refrigerant by heating in the high temperature regenerator 1 flows through the absorption liquid pipe as a medium concentration intermediate absorption liquid, passes through the high temperature heat exchanger 7, and goes to the low temperature regenerator 2. Sent. In the low-temperature regenerator 2, the refrigerant vapor evaporated and separated in the high-temperature regenerator 1 is heated again to further evaporate and separate the refrigerant, and this refrigerant separation increases the concentration of the intermediate absorbing liquid. It becomes a concentrated absorbent. Then, the refrigerant vapor sent to the absorber 5 via the low-temperature heat exchanger 6 and evaporated again in the evaporator 4 is absorbed to become a rare absorbent, and as described above, by the operation of the absorbent pump P2. Circulation returning to the high temperature regenerator 1 through the low temperature heat exchanger 6 and the high temperature heat exchanger 7 is performed.

  Thereby, cold water will be supplied to the load which is not illustrated from the cold water pipe 9, and the cooling operation of the said load will be performed.

  And the cooling water which circulated in the absorber 5 and the condenser 3 as mentioned above, and performed the heat absorption from a refrigerant | coolant vapor | steam is sent to the cooling tower 10, and is spread | dispersed in this cooling tower 10, and is carried out to air | atmosphere. Is circulated to the absorption refrigeration machine 100 again by the operation of the cooling water pump P3.

  Further, a chemical solution supply device 20 is provided in the middle of the cooling water pipe 8 through which the cooling water is sent from the absorption refrigerator 100 to the cooling tower 10, and circulates through the absorption refrigerator 100 and the cooling tower 10. Water treatment agent is injected into the cooling water to prevent the generation of algae.

  As shown in FIG. 2, the chemical liquid supply device 20 includes a solar panel 21 that supplies electric power to the chemical liquid supply device 20, a power storage unit 22 that stores electric power generated by the solar panel 21, and the cooling water. A chemical liquid tank 23 for storing a water treatment agent to be injected into the cooling water, a supply unit 24 for injecting the water treatment agent stored in the chemical liquid tank 23 into the cooling water, a timing for supplying the water treatment agent to the cooling water, and A control unit 25 for controlling the supply amount is provided.

  Further, the control unit 25 includes a setting unit 26 for setting the supply timing and the supply amount of the water treatment agent to the cooling water, and a first detection unit to a third detection unit for controlling the timing. These three detection means are provided.

  The first detection means detects whether either the cooling tower 10 or the cooling water pump P3 is in operation. In the present embodiment, either the cooling tower 10 or the cooling water pump P3 is used. This will be described using a vibration sensor 27 that detects vibration during driving.

  Therefore, the vibration sensor 27 may be provided in the main body of the cooling tower 10, the main body of the cooling water pump P3, or the cooling water pipe 8 connected thereto.

  The second detection means is the solar panel 21. The solar panel 21 generates power by receiving sunlight and supplies power to the power storage unit 22 while supplying power to the control unit 25 to store power. While accumulating to the part 22, it detects whether the generated electric power (voltage VA) from the solar panel 21 is more than the predetermined voltage V1.

  The third detection means is a voltage sensor that detects a storage voltage VB stored in the power storage unit 22, is provided in a power receiving unit of the control unit 25 (not shown), and is stored in the power storage unit 22. It is detected whether or not VB is equal to or higher than a predetermined voltage V2 at which the chemical solution supply device 20 can operate.

  As described above, the chemical liquid supply device 20 is supplied with electric power generated by the solar panel 21, and electric power other than that consumed by the generated electric power control unit 25 is supplied to the power storage unit 22. The control unit 25 can be operated by the generated power from the solar panel 21 or the stored power of the power storage unit 22.

  The control unit 25 detects the voltage value VA of the solar panel 21 that also functions as the second detection means, and starts from the time when the voltage value becomes equal to or higher than the predetermined voltage V1 for the second time every first predetermined time T1. It is determined to open a blow valve (not shown) of the supply unit 23 for a predetermined time T2.

  Alternatively, it is confirmed whether or not the electric power stored in the power storage unit 22 is equal to or higher than a predetermined voltage V2 at which the chemical liquid supply device 22 can operate, and the second predetermined time T2 is changed every first predetermined time T1. Meanwhile, it is determined to open a blow valve (not shown) of the supply unit 23.

  Further, when the vibration sensor 27 is provided as the first detection means and it is determined by the vibration sensor 27 that at least one of the cooling tower 10 and the cooling water pump P3 is in operation, the supply unit 23, the blow valve (not shown) is opened, and the water treatment agent stored in the chemical tank 24 can be supplied via an aspirator (not shown).

  The first predetermined time T1, the second predetermined time T2, the predetermined voltage V1 for determining the voltage value VA of the electric power generated by the solar panel 21, and the power storage unit in which the chemical solution supply device 22 is within the operable range. The predetermined voltage V2 for determining the stored voltage VB stored in 22 can be variably set by an operation switch (not shown) provided in the setting unit 26 of the control unit 25.

  This operation will be described with reference to the flowchart of FIG.

  Note that the timers TA and TB (not shown) that count the first predetermined time and the second predetermined time described above are described as free-run timers that always time and always time from zero each time a reset input is input. To do.

  First, it is determined whether or not the power generation voltage VA of the solar panel 21 is equal to or higher than the predetermined voltage value V1 (step S1). If the power generation voltage VA is equal to or lower than the predetermined voltage value V1, the process proceeds to step S7 and the power storage unit 22 is set to the predetermined voltage. It is determined whether or not it is equal to or greater than V2, and if it is equal to or greater than the predetermined voltage value V1, the process proceeds to step S2 and whether or not the time count of the timer TA has reached the first predetermined time T1 set by the setting unit 26. If the first predetermined time T1 has not been reached, the process proceeds to step S9, the timer TB is reset and returned, and if the first predetermined time T1 has been reached, the cooling tower 27 receives an input signal from the vibration sensor 27. 10 or at least one of the cooling water pumps P3 is determined (step S3). If it is determined in step S3 that at least one of the cooling tower 10 or the cooling water pump P3 is in operation, it is next determined whether or not the timer TB reaches the second predetermined time T2 ( Step S4) If the second predetermined time has been reached, the process proceeds to Step S10, the blow valve is closed and the supply of the chemical liquid to the cooling water is stopped. In Steps S11 and S12, the timers TA and TB are set. Reset and return.

  On the other hand, if it is determined in step 4 that the time measured by the timer TB has not reached the second predetermined time T2, the blow valve is opened in step S5, and the timer TA is reset and returned in step S6. .

  In step S7, it is confirmed whether or not the stored voltage VB of the power storage unit 22 is equal to or higher than the predetermined voltage V2. If it is determined that the stored voltage VB is equal to or higher than the predetermined voltage V2, the process returns to step S2 and the timer TA counts. When it is determined that the voltage is less than the predetermined voltage V2, the process proceeds to step S8 and step S9 sequentially, and the timers TA and TB are reset and returned.

  Thus, in the present invention, the generated power (voltage VA) generated by the solar panel 21 or the stored voltage VB of the power storage unit 22 is detected, and it is detected that the chemical solution supply device 20 is in an operable state. At the same time, the operation of at least one of the cooling tower 10 and the cooling water pump P3 is detected, and the water treatment agent stored in the chemical tank 24 is supplied to the cooling water.

  In the flowchart of FIG. 3 described above, the voltage of the power storage unit 22 is described as being equal to or higher than the predetermined voltage V2, but it is also possible to set the voltage within a predetermined voltage range that limits the upper limit value and lower limit value.

  Accordingly, even if the setting unit 26 of the control unit 25 is operated to set only the first predetermined time and the second predetermined time, the cooling tower 10 is stopped during, for example, an intermediate period or a holiday. In the middle, the supply of the water treatment agent to the cooling water is stopped, so that unnecessary chemical supply can be avoided.

  Further, even after sunset, as long as the chemical solution supply device 22 is operable, the chemical solution can be supplied to the cooling water as necessary.

It is a block diagram of the absorption refrigerator provided with the chemical | medical solution supply apparatus to which this invention is applied. It is a block diagram of the chemical | medical solution supply apparatus to which this invention is applied. It is a flowchart which shows an example of control of the chemical | medical solution supply apparatus by this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 High temperature regenerator 2 Low temperature regenerator 3 Condenser 4 Evaporator 5 Absorber 6 Low temperature heat exchanger 7 High temperature heat exchanger 8 Cooling water pipe 9 Cold water pipe 10 Cooling tower 20 Chemical liquid supply device 21 Solar panel 22 Power storage part 23 Chemical liquid tank 24 Supply part 25 Control part 26 Setting part 27 1st detection means 28 2nd detection means 100 Absorption type refrigerator P1 Refrigerant pump P2 Absorption liquid pump P3 Cooling water pump

Claims (3)

A chemical liquid that includes a solar panel and a power storage unit that charges the generated power of the solar panel, and that can supply the chemical liquid to the circulating water for cooling the cooling tower by the power from the solar panel or the power from the power storage unit In the supply device,
First cooling means that detects that either the cooling tower or a cooling water pump that circulates the cooling water to the cooling tower is in operation, and is based on an input signal from the first detection means. And a control means for supplying a chemical solution to the cooling circulating water.   The control means includes second detection means for detecting a voltage value of the generated power of the solar panel, and third detection means for detecting whether or not a charging voltage of the power storage unit is within an operable range, Based on the input signal from the first means and the signal input from at least one of the second detection means or the third detection means, the chemical solution is supplied to the cooling circulating water. The chemical solution supply apparatus according to claim 1, wherein   The first detection means is a vibration sensor that detects vibration during operation of either the cooling tower or the cooling water pump, and is operating during operation of either the cooling tower or the cooling water pump. The chemical solution supply device according to claim 1, wherein the chemical solution supply device is provided at a site where vibration can be detected.

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