CN221174542U - Boiler water quality on-line monitoring system - Google Patents

Abstract

The utility model relates to a boiler water quality on-line monitoring system, which comprises a sampling cooling container, a sampling tube, a direct measurement component, a titration container, a water taking mechanism, a phenolphthalein filling mechanism, a methyl orange filling mechanism, an acid liquor filling mechanism, a color identifier and a control mechanism, wherein the sampling cooling container is connected with a boiler, one end of the sampling tube is communicated with the sampling container, the other end of the sampling tube is communicated with the sampling cooling container, and the direct measurement component is arranged on the sampling tube or the sampling container and can directly measure water quality and is communicated with the control mechanism; the water taking mechanism can send the water in the sampling container to the titration container; a stirrer is arranged in the titration container; the phenolphthalein filling mechanism, the methyl orange filling mechanism and the acid liquor filling mechanism are communicated with the titration container; the color identifier can detect the color of the liquid in the titration container and is in communication connection with the control mechanism; the control mechanism is respectively connected with the water taking mechanism, the phenolphthalein filling mechanism, the methyl orange filling mechanism and the acid liquor filling mechanism in a control way.

Description

Boiler water quality on-line monitoring system

Technical Field

The utility model relates to the technical field of steam boilers, in particular to a boiler water quality on-line monitoring system.

Background

The current test of the boiler water quality in a power plant mainly depends on manual work, and the situation that the process detection error is large and the measured value is extremely poor exists; and the furnace water cooling process which is required to be completed before water taking detection also needs manual operation, and the flow is relatively complicated. At present, a detection sensor capable of measuring water quality such as conductivity, hardness, alkalinity, PH and the like and an online titrator exist at home and abroad, and the online detection sensor is popular in recent years. The boiler has different types, different pressures, different capacities and different purposes, the water quality standards are different, and the projects and methods of water quality tests of various industrial enterprises are different. The general full-adaptive water quality monitoring system is difficult to realize, and a proper water quality monitoring and early warning system is necessarily developed by combining the actual conditions of an industrial boiler. At present, the water quality detection of the boilers of the same type inside and outside the industry is mainly performed in a traditional discrete titration mode, and the water quality detection of the boilers is completed by means of timing, personnel setting and qualification setting together with manual data recording, so that the water quality detection method cannot meet the needs of intensive, automatic and intelligent development to a certain extent.

Disclosure of utility model

In view of the above-mentioned shortcomings of the prior art, the technical problem to be solved by the present utility model is to provide an online monitoring system for boiler water quality, which can realize automatic online monitoring for boiler water quality and meet the needs of intensive, automatic and intelligent development.

The utility model provides an online monitoring system for water quality of a boiler, which is used for detecting the water quality in the boiler and comprises a sampling cooling container, a sampling tube, a direct measurement assembly, a titration container, a water taking mechanism, a phenolphthalein filling mechanism, a methyl orange filling mechanism, an acid liquor filling mechanism, a color identifier and a control mechanism, wherein the sampling cooling container is connected with the boiler through a pipeline, one end of the sampling tube is communicated with the sampling container, the other end of the sampling tube is communicated with the sampling cooling container, the direct measurement assembly comprises a sensor which is arranged on the sampling tube or the sampling container and can directly measure the water quality, and the direct measurement assembly is in communication connection with the control mechanism; the water taking mechanism is connected with the sampling container and the titration container and can send water in the sampling container to the titration container; a stirrer is arranged in the titration container; the phenolphthalein filling mechanism is communicated with the titration container, can fill phenolphthalein solution into the titration container, the methyl orange filling mechanism is communicated with the titration container, can fill methyl orange solution into the titration container, and the acid liquor filling mechanism is communicated with the titration container, and can fill acid liquor into the titration container; the color identifier can detect the color of the liquid in the titration container and is in communication connection with the control mechanism; the control mechanism is respectively connected with the water taking mechanism, the phenolphthalein filling mechanism, the methyl orange filling mechanism and the acid liquor filling mechanism in a control manner.

Further, the direct measurement assembly includes a PH sensor, a conductivity sensor, and a TDS sensor.

Further, the direct measurement assembly also includes a temperature sensor.

Further, the stirrer in the titration vessel is a magnetic stirrer.

Further, the water taking mechanism comprises a water taking pipe connected with the sampling container and the titration container, and a water taking peristaltic pump arranged on the water taking pipe.

Further, the phenolphthalein filling mechanism comprises a phenolphthalein storage container, a phenolphthalein filling pipe connecting the phenolphthalein storage container and the titration container, and a phenolphthalein peristaltic pump arranged on the phenolphthalein filling pipe.

Further, the methyl orange filling mechanism comprises a methyl orange storage container, a methyl orange filling pipe connecting the methyl orange storage container and the titration container, and a methyl orange peristaltic pump arranged on the methyl orange filling pipe.

Further, the acid liquor filling mechanism comprises an acid liquor storage container, an acid liquor filling pipe connected with the acid liquor storage container and the titration container, and an acid liquor peristaltic pump arranged on the acid liquor filling pipe.

Further, the plurality of sampling cooling containers are communicated with the plurality of boilers respectively, and all the sampling cooling containers are communicated with the sampling pipe through separate pipelines.

Further, a draining mechanism connected with the titration container is also included, and the draining mechanism is used for draining the solution in the titration container.

As described above, the boiler water quality on-line monitoring system has the following beneficial effects:

1. The automatic temperature-reducing pretreatment device can automatically collect a furnace water sample, automatically perform temperature-reducing pretreatment according to measurement requirements, automatically perform water quality detection, directly measure parameters such as PH value, conductivity, TDS and the like, simultaneously perform automatic titration, indirectly measure parameters such as full alkalinity, phenolphthalein alkalinity, relative alkalinity and the like, and realize automation of the whole detection work so as to meet the needs of intensive, automatic and intelligent development.

2. The automatic periodic detection can be realized, the monitoring work of water quality of a plurality of boilers can be realized, the alarm early warning 3 is realized, the online detection data can be automatically recorded and stored, and the subsequent review is convenient.

Drawings

FIG. 1 is a schematic diagram of the boiler water quality on-line monitoring system of the present utility model.

FIG. 2 is a schematic diagram of a part of the on-line boiler water quality monitoring system according to the present utility model.

Description of the reference numerals

1. Sampling cooling container

2. Sampling container

3. Sampling tube

4. Direct measurement assembly

41 TDS sensor

42. Conductivity sensor

43 PH value sensor

44. Temperature sensor

5. Titration container

51. Stirrer

6. Water intake mechanism

61. Water intake pipe

62. Peristaltic pump for taking water

7. Phenolphthalein filling mechanism

71. Phenolphthalein storage container

72. Phenolphthalein filling pipe

73. Phenolphthalein peristaltic pump

8. Methyl orange filling mechanism

81. Methyl orange storage container

82. Methyl orange filling pipe

83. Methyl orange peristaltic pump

9. Acid liquor filling mechanism

91. Acid liquor storage container

92. Acid liquor filling pipe

93. Peristaltic pump for acid liquor

10. Color identifier

11. Liquid draining mechanism

111. Waste liquid barrel

112. Liquid discharge pipe

113. Liquid discharge pump

Detailed Description

Further advantages and effects of the present utility model will become apparent to those skilled in the art from the disclosure of the present utility model, which is described by the following specific examples.

It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the utility model to the extent that it can be practiced, since modifications, changes in the proportions, or adjustments of the sizes, which are otherwise, used in the practice of the utility model, are included in the spirit and scope of the utility model which is otherwise, without departing from the spirit or scope thereof. Also, the terms such as "upper", "lower", "left", "right", "middle", etc. are used herein for convenience of description, but are not to be construed as limiting the scope of the utility model, and the relative changes or modifications are not to be construed as essential to the scope of the utility model.

Referring to fig. 1 to 2, the utility model provides an online monitoring system for boiler water quality, which is used for detecting water quality in a boiler and comprises a sampling cooling container 1, a sampling container 2, a sampling tube 3, a direct measurement assembly 4, a titration container 5, a water taking mechanism 6, a phenolphthalein filling mechanism 7, a methyl orange filling mechanism 8, an acid liquor filling mechanism 9, a color identifier 10 and a control mechanism, wherein the sampling cooling container 1 is connected with the boiler by pipelines, one end of the sampling tube 3 is communicated with the sampling container 2, the other end is communicated with the sampling cooling container 1, the direct measurement assembly 4 comprises a sensor which is arranged on the sampling tube 3 or the sampling container 2 and can directly measure water quality, and the direct measurement assembly 4 is in communication connection with the control mechanism; the water taking mechanism 6 is connected with the sampling container 2 and the titration container 5 and can send water in the sampling container 2 to the titration container 5; the titration vessel 5 is provided with a stirrer 51; the phenolphthalein filling mechanism 7 is communicated with the titration container 5, can fill phenolphthalein solution into the titration container 5, the methyl orange filling mechanism 8 is communicated with the titration container 5, can fill methyl orange solution into the titration container 5, and the acid liquor filling mechanism 9 is communicated with the titration container 5, and can fill acid liquor into the titration container 5; the color identifier 10 is capable of detecting the color of the liquid in the titration vessel 5, and the color identifier 10 is in communication with the control mechanism; the control mechanism is respectively connected with the water taking mechanism 6, the phenolphthalein filling mechanism 7, the methyl orange filling mechanism 8 and the acid liquor filling mechanism 9 in a control way.

The basic working principle of the boiler water quality on-line monitoring system related by the utility model is as follows: the color identifier 10 is a sensor that can identify the color of the liquid, and specifically, a photoelectric sensor can be used. In operation, a certain amount of water sample is pumped from the boiler to the sampling cooling container 1 for cooling, cooling treatment before detection is realized, then the water sample is directly detected by the direct measurement component 4 through the sampling tube 3 to the sampling container 2, and some water quality parameters which can be directly measured of the water sample can be directly detected, including but not limited to PH value, conductivity, dissolved solids (TDS) and the like, wherein The Dissolved Solids (TDS) are used for detecting relative alkalinity. The total alkalinity of the water sample and the phenolphthalein alkalinity are detected by measuring in a titration mode, specifically, the water taking mechanism 6 is controlled by the control mechanism to work, a certain amount of the water sample is sent from the sampling container 2 to the titration container 5, the quantity of the water sample can be preset in the control mechanism, then the control mechanism controls the phenolphthalein filling mechanism 7 to gradually add the phenolphthalein solution into the sampling container 2 as an indicator to perform titration, the stirrer 51 is slowly stirred in the titration process, the color change condition of the solution in the sampling container 2 is monitored by the color identifier 10, when the solution becomes red, the control mechanism controls the acid filling mechanism 9 to add the acid solution, such as dilute sulfuric acid solution, into the sampling container 2 to perform titration, the stirrer 51 is slowly stirred in the titration process, when the solution in the sampling container 2 becomes transparent, the color identifier 10 transmits a signal to the control mechanism, the control mechanism controls the acid solution filling mechanism 9 to stop filling, and the phenolphthalein alkalinity is obtained according to the calculation of the dosage of the dilute sulfuric acid solution. Then, the methyl orange filling mechanism 8 is controlled to add methyl orange solution into the sampling container 2 as an indicator, the acid solution filling mechanism 9 is controlled to gradually add acid solution, such as dilute sulfuric acid solution, into the sampling container 2 for titration, the stirrer 51 is slowly stirred in the titration process, the color change condition of the solution in the sampling container 2 is monitored through the color identifier 10, when the color identifier 10 identifies that the color of the liquid changes to be transparent, a signal is output to the control mechanism, the control mechanism controls the acid solution filling mechanism 9 to stop, and according to the using amount of the acid solution, the total alkalinity of the water sample can be obtained by combining phenolphthalein alkalinity. Therefore, the relative alkalinity, the total alkalinity and the phenolphthalein alkalinity parameters of the boiler water sample can be calculated according to a calculation formula through the measurement result of the online monitoring system.

The boiler water quality on-line monitoring system can realize automatic measurement of water quality, can directly measure parameters such as PH value, conductivity, TDS and the like, and can realize automatic titration work, thereby indirectly obtaining parameters such as full alkalinity, phenolphthalein alkalinity, relative alkalinity and the like, and the whole detection work can realize automation, thereby meeting the needs of intensive, automatic and intelligent development.

In the preferred embodiment, referring to fig. 1, the water in the boiler is delivered to the sampling cooling container 1, and the delivery of the water in the sampling cooling container 1 to the sampling container 2 can be controlled by an electromagnetic valve, and the opening and closing of the electromagnetic valve can be controlled by the electromagnetic valve, so that the full automation of the detection work is further realized. Further, the bottom of the sampling container 2 is also provided with a drain pipe, the drain pipe is provided with an electromagnetic valve, the opening and closing of the electromagnetic valve on the drain pipe are controlled by a control mechanism, and water samples in the sampling container 2 are drained after each detection work is completed.

In this embodiment, referring to fig. 1 and 2, as a preferred design, the direct measurement assembly 4 includes a PH sensor 43, a conductivity sensor 42, and a TDS sensor 41 (for detecting dissolved solids), all three of which are mounted on the sampling tube 3. Preferably, the direct measurement assembly 4 further comprises a temperature sensor 44 provided on the sampling tube 3 for detecting the temperature of the water sample entering the sampling vessel 2, avoiding excessive temperatures.

In this embodiment, referring to fig. 1 and 2, as a preferred design, the stirrer 51 in the titration container 5 is a magnetic stirrer 51, which has a good stirring effect and can better promote the accuracy of titration detection. The start and stop of the magnetic stirrer 51 may be controlled by a control mechanism.

In this embodiment, referring to fig. 1 and 2, as a preferred design, the water intake mechanism 6 includes a water intake pipe 61 connecting the sampling container 2 and the titration container 5, and a water intake peristaltic pump 62 disposed on the water intake pipe 61, the control mechanism is in control connection with the water intake peristaltic pump 62, the water intake peristaltic pump 62 may be a BT100-2J standard peristaltic pump, a certain amount of water sample may be accurately pumped into the titration container 5 by the water intake peristaltic pump 62, and the pumping amount may be determined, and the pumping amount data may be transmitted to the control mechanism.

In this embodiment, referring to fig. 1 and 2, as a preferred design, the phenolphthalein filling mechanism 7 comprises a phenolphthalein storage container 71, a phenolphthalein filling pipe 72 connecting the phenolphthalein storage container 71 and the titration container 5, and a phenolphthalein peristaltic pump 73 provided on the phenolphthalein filling pipe 72, the phenolphthalein storage container 71 stores therein a phenolphthalein solution, the phenolphthalein peristaltic pump 73 employs a peristaltic pump of a BT100-1F dispensing type, and can accurately pump the phenolphthalein solution in the phenolphthalein storage container 71 into the titration container 5, and determine the pumping amount, thereby determining the consumption amount of the phenolphthalein solution, and transmit data to a control mechanism for automatic calculation.

In this embodiment, referring to fig. 1 and 2, as a preferred design, the methyl orange filling mechanism 8 includes a methyl orange storage vessel 81, a methyl orange filling tube 82 connecting the methyl orange storage vessel 81 and the titration vessel 5, and a methyl orange peristaltic pump 83 disposed on the methyl orange filling tube 82. The methyl orange solution is stored in the methyl orange storage container 81, and the methyl orange peristaltic pump 83 adopts a BT100-1F distribution peristaltic pump, has the functions of flow display, flow correction, communication, liquid amount distribution, back suction, output control and the like besides the basic control function, can accurately pump the methyl orange solution in the methyl orange storage container 81 into the titration container 5, strictly controls the injection quantity, determines the pumping quantity, further determines the consumption of phenolphthalein solution, and transmits data to a control mechanism for automatic calculation.

In the present embodiment, referring to fig. 1 and 2, as a preferred design, the acid liquid charging mechanism 9 includes an acid liquid storage container 91, an acid liquid charging pipe 92 connecting the acid liquid storage container 91 and the titration container 5, and an acid liquid peristaltic pump 93 provided on the acid liquid charging pipe 92. The acid liquid storage container 91 stores acid liquid, such as dilute sulfuric acid, and the acid liquid peristaltic pump 93 adopts a BT100-2J standard peristaltic pump, so that the consumption of phenolphthalein solution can be determined, and the data can be transmitted to a control mechanism for automatic calculation.

In this embodiment, referring to fig. 1 and 2, as a preferred design, the boiler water quality online monitoring system may be used to perform water quality detection on a plurality of boiler water samples at the same time, where the sampling cooling containers 1 are plural and are respectively communicated with a plurality of boilers, and all the sampling cooling containers 1 are communicated with the sampling tube 3 through separate pipelines. Therefore, when a certain boiler needs to be detected, the water quality in the boiler is extracted into the corresponding sampling cooling container 1 for cooling, and then extracted into the sampling container 2 for detection. In this embodiment, a bypass is also provided on the sampling tube 3 at the sampling cooling container 1 for manual sampling detection.

In this embodiment, referring to fig. 1 and 2, as a preferred design, the sample cooling container 1 is cooled by a cooling water device, the cooling water device uses the desalted waste water to exchange heat with the sample cooling container 1, so as to accelerate the cooling of the sample cooling container 1, and the operation of the cooling water device is controlled by a control mechanism. For some boiler units, the sampling cooling tank can be carried by the boiler unit itself, and the sampling cooling container 1 can directly use the sampling cooling tank of the boiler unit itself.

In this embodiment, referring to fig. 1 and 2, as a preferred design, the boiler water quality online monitoring system further comprises a drain mechanism 11 connected to the titration vessel 5, wherein the drain mechanism 11 is used for draining the solution in the titration vessel 5. Specifically, the liquid draining mechanism 11 includes a waste liquid barrel 111, a liquid draining pipe 112 and a liquid draining pump 113, one end of the liquid draining pipe 112 is connected with the waste liquid barrel 111, the other end extends into the titration container 5, the liquid draining pump 113 is arranged on the liquid draining pipe 112 to provide pumping power, specifically, a peristaltic pump can be adopted, the control mechanism is connected with the liquid draining pump 113 in a control manner, after each titration operation is completed, the liquid draining pump 113 is controlled by the control system to work, the solution in the titration container 5 is drained completely and collected into the waste liquid barrel 111, and the next treatment is performed in a concentrated manner.

In the utility model, the control mechanism can adopt a PLC controller, can realize the operation control of the water taking mechanism 6, the phenolphthalein filling mechanism 7, the methyl orange filling mechanism 8, the acid liquor filling mechanism 9 and the like through the pre-programming, and can realize the collection, archiving, storage, processing and calculation of related measurement data. The sampling detection work can be automatically carried out every time, and meanwhile, a corresponding program can be arranged in the PLC, so that the sampling detection work can be periodically and automatically carried out for a plurality of times. Preferably, a standard reference value of the related parameter can be set in the PLC, the data after direct measurement and the data obtained through calculation are compared with the standard reference value, and when the data result approaches to the standard reference, an operation and maintenance person is automatically prompted to pay attention to the operation condition of the boiler system, and an alarm is given when the value exceeds the standard reference, so that an operator is warned to process the data. An interface program can be arranged in the PLC controller to realize interconnection and intercommunication with the existing energy management platform.

From the above, the boiler water quality online monitoring system of the utility model has the following beneficial effects:

1. The automatic temperature-reducing pretreatment device can automatically collect a furnace water sample, automatically perform temperature-reducing pretreatment according to measurement requirements, automatically perform water quality detection, directly measure parameters such as PH value, conductivity, TDS and the like, simultaneously perform automatic titration, indirectly measure parameters such as full alkalinity, phenolphthalein alkalinity, relative alkalinity and the like, and realize automation of the whole detection work so as to meet the needs of intensive, automatic and intelligent development.

2. The automatic periodic detection can be realized, the monitoring work of the water quality of a plurality of boilers can be realized, and the alarm and early warning can be realized.

3. The online detection data can be automatically recorded and stored, so that the follow-up reference is facilitated.

In summary, the present utility model effectively overcomes the disadvantages of the prior art and has high industrial utility value.

The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations of the utility model be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.

Claims (10)

1. An online monitoring system of boiler quality of water for detect the quality of water in the boiler, its characterized in that: the device comprises a sampling cooling container (1), a sampling container (2), a sampling tube (3), a direct measurement component (4), a titration container (5), a water taking mechanism (6), a phenolphthalein filling mechanism (7), a methyl orange filling mechanism (8), an acid liquor filling mechanism (9), a color identifier (10) and a control mechanism, wherein the sampling cooling container (1) is connected with a boiler through a pipeline, one end of the sampling tube (3) is communicated with the sampling container (2), the other end of the sampling tube is communicated with the sampling cooling container (1), the direct measurement component (4) comprises a sensor which is arranged on the sampling tube (3) or the sampling container (2) and can directly measure water quality, and the direct measurement component (4) is communicated with the control mechanism; the water taking mechanism (6) is connected with the sampling container (2) and the titration container (5) and can send water in the sampling container (2) to the titration container (5); a stirrer (51) is arranged in the titration container (5); the phenolphthalein filling mechanism (7) is communicated with the titration container (5) and can be used for filling phenolphthalein solution into the titration container (5), the methyl orange filling mechanism (8) is communicated with the titration container (5) and can be used for filling methyl orange solution into the titration container (5), and the acid liquor filling mechanism (9) is communicated with the titration container (5) and can be used for filling acid liquor into the titration container (5); the color identifier (10) can detect the color of the liquid in the titration container (5), and the color identifier (10) is in communication connection with the control mechanism; the control mechanism is respectively connected with the water taking mechanism (6), the phenolphthalein filling mechanism (7), the methyl orange filling mechanism (8) and the acid liquor filling mechanism (9) in a control manner.

2. The boiler water quality on-line monitoring system of claim 1 wherein: the direct measurement assembly (4) includes a PH sensor (43), a conductivity sensor (42), and a TDS sensor (41).

3. The boiler water quality on-line monitoring system of claim 2 wherein: the direct measurement assembly (4) further comprises a temperature sensor (44).

4. The boiler water quality on-line monitoring system of claim 1 wherein: the stirrer (51) in the titration vessel (5) is a magnetic stirrer (51).

5. The boiler water quality on-line monitoring system of claim 1 wherein: the water taking mechanism (6) comprises a water taking pipe (61) for connecting the sampling container (2) and the titration container (5), and a water taking peristaltic pump (62) arranged on the water taking pipe (61).

6. The boiler water quality on-line monitoring system of claim 1 wherein: the phenolphthalein filling mechanism (7) comprises a phenolphthalein storage container (71), a phenolphthalein filling pipe (72) connected with the phenolphthalein storage container (71) and the titration container (5), and a phenolphthalein peristaltic pump (73) arranged on the phenolphthalein filling pipe (72).

7. The boiler water quality on-line monitoring system of claim 1 wherein: the methyl orange filling mechanism (8) comprises a methyl orange storage container (81), a methyl orange filling pipe (82) connected with the methyl orange storage container (81) and the titration container (5), and a methyl orange peristaltic pump (83) arranged on the methyl orange filling pipe (82).

8. The boiler water quality on-line monitoring system of claim 1 wherein: the acid liquor filling mechanism (9) comprises an acid liquor storage container (91), an acid liquor filling pipe (92) connected with the acid liquor storage container (91) and the titration container (5), and an acid liquor peristaltic pump (93) arranged on the acid liquor filling pipe (92).

9. The boiler water quality on-line monitoring system of claim 1 wherein: the sampling cooling containers (1) are multiple and are respectively communicated with the multiple boilers, and all the sampling cooling containers (1) are communicated with the sampling pipe (3) through separate pipelines.

10. The boiler water quality on-line monitoring system of claim 1 wherein: the device also comprises a drainage mechanism (11) connected with the titration container (5), wherein the drainage mechanism (11) is used for draining the solution in the titration container (5).