A pH control system for coal coking circulating fluid

Abstract

The invention discloses a pH control system for coal coking circulating liquid, comprising a pH control system for acid washing tower circulating liquid and a pH control system for alkali washing tower circulating liquid. A pH detection control device is arranged between the pH control system for acid washing tower circulating liquid and the pH control system for alkali washing tower circulating liquid. The pH of the spraying liquid of the acid washing tower and the alkali washing tower is monitored and analyzed in real time and compared with the set pH by the pH detection control device. The opening of the automatic regulating valve is controlled according to the output signal of the comparison result, so as to realize automatic monitoring, detection and control of the pH of the spraying liquid of the acid washing tower and the alkali washing tower. The invention has the beneficial effects of realizing automatic monitoring, detection and control of the pH of the acid washing tower and the alkali washing tower, reducing labor, replacing manual detection and testing with a pH detector, eliminating human unsafe factors, and realizing all-weather real-time detection by the pH detector, with high operation accuracy, high acid and alkali dosage accuracy, and energy saving and consumption reduction.

Description

Technical Field

[0001] The invention belongs to the field of coal mining chemical industry, and more specifically, the invention relates to a pH control system for coal coking circulating fluid. Background Art

[0002] With the rapid development of control technology, computer network technology, information technology and communication technology, users have higher and higher requirements for comfort, safety and environmental protection. Traditional and backward manual operation will gradually be replaced by automated and intelligent control.

[0003] In the current working process of coal mining chemical industry, coal cleaning and screening are mostly carried out manually or semi-automatically. Traditional coal cleaning and screening requires manual operation from coal transportation to acid and alkali reagent addition. This is not only complicated to operate, but also has low product precision, low work efficiency and high labor cost. In addition, some volatile organic compounds in the process of manual coal cleaning and screening will have a great impact on the physical and mental health of employees, and have certain safety hazards. Summary of the invention

[0004] The purpose of the invention is to solve the problems of complex operation, low product accuracy and certain safety hazards in the coal cleaning and screening process to the greatest extent, and to provide a pH control system for coal coking circulating fluid.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] The invention discloses a pH control system for coal coking circulating liquid, comprising a pH control system for acid washing tower circulating liquid and a pH control system for alkali washing tower circulating liquid, wherein a pH detection control device is arranged between the pH control system for acid washing tower circulating liquid and the pH control system for alkali washing tower circulating liquid.

[0007] The present invention discloses a pH control system for coal coking circulating liquid. The pH control system for the circulating liquid of a pickling tower comprises an acid storage metering device, an acid automatic regulating valve and a pickling tower which are sequentially connected in series through a pipeline. The acid storage metering device is provided with an acid precision metering pump and an acid storage container. The output end of the acid storage container is connected to the input end of the acid precision metering pump through a pipeline, and the output end of the acid precision metering pump is connected to the input end of the acid automatic regulating valve.

[0008] The present invention discloses a pH control system for coal coking circulating liquid. The pH control system for alkali washing tower circulating liquid comprises an alkali storage metering device, an alkali automatic regulating valve and an alkali washing tower which are sequentially connected in series through a pipeline. The alkali storage metering device is provided with an alkali precision metering pump and an alkali storage container. The output end of the alkali storage container is connected to the input end of the alkali precision metering pump through a pipeline, and the output end of the alkali precision metering pump is connected to the input end of the alkali automatic regulating valve.

[0009] The present invention discloses a pH control system for coal coking circulating liquid. The acid washing tower is configured as a liquid circulation structure. The circulating liquid in the acid washing tower enters the acid washing tower through an outlet pipe for re-cleaning. The alkali washing tower is configured as a liquid circulation structure. The circulating liquid in the alkali washing tower enters the alkali washing tower through an outlet pipe for re-cleaning.

[0010] The present invention discloses a pH control system for coal coking circulating liquid. The pH detection control device comprises a first high-precision pH detector, a second high-precision pH detector and a pH control and display. The first high-precision pH detector is arranged in an outlet pipeline of the circulating liquid of an acid washing tower, and the second high-precision pH detector is arranged in an outlet pipeline of the circulating liquid of an alkali washing tower. The first high-precision pH detector and the second high-precision pH detector transmit pH signals to the pH control and display through signal lines respectively. The pH control and display are connected to the signal input ends of the acid automatic regulating valve and the alkali automatic regulating valve through the signal lines respectively, and the opening of the acid automatic regulating valve and the alkali automatic regulating valve are controlled to control the flow rate of the acid solution in the acid storage container and the alkali solution in the alkali storage container in the pipeline, and control the pH value of the circulating liquid in the acid washing tower and the alkali washing tower.

[0011] The present invention discloses a method for using a pH control system for coal coking circulating fluid, comprising the following steps:

[0012] S1. The first high-precision pH detector detects the pH value of the circulating liquid in the pickling tower, transmits the pH value of the circulating liquid to the pH control and display through the signal line, sets the pH control range in advance in the pH control and display, and the pH control and display compares the pH value of the circulating liquid detected by the first high-precision pH detector with the set pH. According to the comparison result, the output signal is transmitted to the acid automatic regulating valve to control the opening of the acid automatic regulating valve, so as to control the flow rate of the acid liquid in the acid storage container in the pipeline and adjust the pH value of the spraying liquid in the pickling tower.

[0013] S2. The second high-precision pH detector detects the pH value of the circulating liquid in the alkali washing tower, transmits the pH value of the circulating liquid to the pH control and display through the signal line, sets the pH control range in advance in the pH control and display, and the pH control and display compares the pH value of the circulating liquid detected by the second high-precision pH detector with the set pH. According to the comparison result, the output signal is transmitted to the alkali automatic regulating valve to control the opening of the alkali automatic regulating valve, so as to control the flow rate of the acid and alkali solution in the alkali storage container in the pipeline and adjust the pH value of the spraying liquid in the alkali washing tower.

[0014] The technical scheme disclosed in the present invention is adopted, and the pH of the spraying liquid of the pickling tower and the alkali washing tower is monitored and analyzed in real time by using a pH control system and compared with the set pH, and the opening of the automatic regulating valve is controlled according to the comparison result output signal, so as to realize automatic monitoring, detection and control of the pH of the spraying liquid of the pickling tower and the alkali washing tower. The whole process does not need manual operation, which reduces labor and alleviates the labor intensity of employees. The pH detector replaces the traditional manual detection and testing, fundamentally eliminates the unsafe factors of human beings, and is safe and reliable. The pH detector can detect the circulating liquid in real time around the clock, and adjust the opening of the automatic regulating valve at the outlet of the precision metering pump according to the pH condition of the circulating liquid to ensure the pH of the spraying liquid, and the operation accuracy is high. The pH control device is used to realize the precise control of the pH of the spraying liquid of the pickling tower and the alkali washing tower, thereby eliminating the waste of acid and alkali and realizing energy saving and consumption reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The following is a brief description of the contents and symbols in the drawings of this specification:

[0016] Figure 1 It is a structural schematic diagram of a pH control system for coal coking circulating fluid;

[0017] The marks in the above figures are: 1. The first high-precision pH detector; 2. pH control and display; 3. Acid washing tower; 4. Alkali washing tower; 5. Acid automatic regulating valve; 6. Alkali automatic regulating valve; 7. Acid precision metering pump; 8. Acid storage container; 9. Alkali precision metering pump; 10. Alkali storage container; 11. The second high-precision pH detector. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0019] Figure 1 This is a structural schematic diagram of a pH control system for coal coking circulating fluid of the present invention, as shown in the figure:

[0020] A pH control system for coal coking circulating liquid comprises a pH control system for acid washing tower circulating liquid and a pH control system for alkali washing tower circulating liquid, wherein a pH detection control device is arranged between the pH control system for acid washing tower circulating liquid and the pH control system for alkali washing tower circulating liquid.

[0021] The pH control system of the acid washing tower circulating liquid includes an acid storage metering device, an acid automatic regulating valve 5 and a pickling tower 3 which are sequentially connected in series through a pipeline. The acid storage metering device is provided with an acid precision metering pump 7 and an acid storage container 8. The output end of the acid storage container 8 is connected to the input end of the acid precision metering pump 7 through a pipeline, and the output end of the acid precision metering pump 7 is connected to the input end of the acid automatic regulating valve 5.

[0022] The pH control system of the circulating liquid of the alkali washing tower includes an alkali storage metering device, an alkali automatic regulating valve 6 and an alkali washing tower 4 which are connected in series in sequence through pipelines. The alkali storage metering device is provided with an alkali precision metering pump 9 and an alkali storage container 10. The output end of the alkali storage container 10 is connected to the input end of the alkali precision metering pump 9 through a pipeline, and the output end of the alkali precision metering pump 9 is connected to the input end of the alkali automatic regulating valve 6.

[0023] The acid washing tower 3 is configured as a liquid circulation structure, and the circulating liquid in the acid washing tower 3 enters the acid washing tower 3 through the outlet pipe for re-cleaning. The alkali washing tower 4 is configured as a liquid circulation structure, and the circulating liquid in the alkali washing tower 4 enters the alkali washing tower 4 through the outlet pipe for re-cleaning.

[0024] The pH detection control device includes a first high-precision pH detector 1, a second high-precision pH detector 11 and a pH control and display 2. The first high-precision pH detector 1 is arranged in the circulating liquid outlet pipe of the acid washing tower 3, and the second high-precision pH detector 11 is arranged in the circulating liquid outlet pipe of the alkali washing tower 4.

[0025] The first high-precision pH detector 1 and the second high-precision pH detector 11 transmit pH signals to the pH control and display 2 through signal lines respectively. The pH control and display 2 is connected to the signal input ends of the acid automatic regulating valve 5 and the alkali automatic regulating valve 6 through signal lines respectively, and controls the opening of the acid automatic regulating valve 5 and the alkali automatic regulating valve 5 to control the flow rate of the acid solution in the acid storage container 8 and the alkali solution in the alkali storage container 10 in the pipeline, and controls the pH value of the spraying liquid in the acid washing tower 3 and the alkali washing tower 4.

[0026] The pH value of the circulating liquid in the pickling tower 3 is detected by the first high-precision pH detector 1, and the pH value of the circulating liquid is transmitted to the pH control and display 2 through the signal line. The pH control range is set in advance in the pH control and display 2. The pH control and display 2 compares the pH value of the circulating liquid detected by the first high-precision pH detector 1 with the set pH, and outputs a signal according to the comparison result and transmits it to the acid automatic regulating valve 5 to control the opening of the acid automatic regulating valve 5, so as to control the flow rate of the acid liquid in the acid storage container 8 in the pipeline and adjust the pH value of the spraying liquid in the pickling tower 3.

[0027] The pH value of the circulating liquid in the alkali washing tower 4 is detected by the second high-precision pH detector 11, and the pH value of the circulating liquid is transmitted to the pH control and display 2 through the signal line. The pH control range is set in advance in the pH control and display 2. The pH control and display 2 compares the pH value of the circulating liquid detected by the second high-precision pH detector 11 with the set pH, and outputs a signal according to the comparison result to transmit it to the alkali automatic regulating valve 6 to control the opening of the alkali automatic regulating valve 6, so as to control the flow rate of the acid and alkali solution in the alkali storage container 10 in the pipeline and adjust the pH value of the spraying liquid in the alkali washing tower 4.

[0028] The technical scheme disclosed in the present invention is adopted, and the pH of the spraying liquid of the pickling tower and the alkali washing tower is monitored and analyzed in real time by using a pH control system and compared with the set pH, and the opening of the automatic regulating valve is controlled according to the comparison result output signal, so as to realize automatic monitoring, detection and control of the pH of the spraying liquid of the pickling tower and the alkali washing tower. The whole process does not need manual operation, which reduces labor and alleviates the labor intensity of employees. The pH detector replaces the traditional manual detection and testing, fundamentally eliminates the unsafe factors of human beings, and is safe and reliable. The pH detector can detect the circulating liquid in real time around the clock, and adjust the opening of the automatic regulating valve at the outlet of the precision metering pump according to the pH condition of the circulating liquid to ensure the pH of the spraying liquid, and the operation accuracy is high. The pH control device is used to realize the precise control of the pH of the spraying liquid of the pickling tower and the alkali washing tower, thereby eliminating the waste of acid and alkali and realizing energy saving and consumption reduction.

[0029] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A method for using a pH control system for coal coking circulating liquid, comprising a pH control system for acid washing tower circulating liquid and a pH control system for alkali washing tower circulating liquid, wherein a pH detection control device is arranged between the pH control system for acid washing tower circulating liquid and the pH control system for alkali washing tower circulating liquid; the pH control system for acid washing tower circulating liquid comprises an acid storage metering device, an acid automatic regulating valve and an acid washing tower sequentially connected in series through a pipeline, the acid storage metering device is provided with an acid precision metering pump and an acid storage container, the output end of the acid storage container is connected to the input end of the acid precision metering pump through a pipeline, and the output end of the acid precision metering pump is connected to the input end of the acid automatic regulating valve; the pH control system for alkali washing tower circulating liquid comprises an alkali storage metering device, an alkali automatic regulating valve and an alkali washing tower sequentially connected in series through a pipeline, the alkali storage metering device is provided with an alkali precision metering pump and an alkali storage container, the output end of the alkali storage container is connected to the alkali precision metering pump through a pipeline The input end of the pump is connected, and the output end of the alkali precision metering pump is connected to the input end of the alkali automatic regulating valve; the pickling tower is arranged as a liquid circulation structure, and the circulating liquid in the pickling tower enters the pickling tower through the outlet pipe for re-cleaning, and the alkali washing tower is arranged as a liquid circulation structure, and the circulating liquid in the alkali washing tower enters the alkali washing tower through the outlet pipe for re-cleaning; the pH detection control device comprises a first high-precision pH detector, a second high-precision pH detector and a pH control and display, the first high-precision pH detector is arranged in the outlet pipe of the circulating liquid of the pickling tower, and the second high-precision pH detector is arranged in the outlet pipe of the circulating liquid of the alkali washing tower, the first high-precision pH detector and the second high-precision pH detector transmit the pH signal to the pH control and display through the signal line respectively, and the pH control and display are connected to the signal input end of the acid automatic regulating valve and the alkali automatic regulating valve through the signal line respectively; it is characterized in that The following steps are involved: S1. The first high-precision pH detector detects the pH value of the circulating liquid in the pickling tower, transmits the pH value of the circulating liquid to the pH control and display through the signal line, sets the pH control range in advance in the pH control and display, and the pH control and display compares the pH value of the circulating liquid detected by the first high-precision pH detector with the set pH, outputs a signal according to the comparison result and transmits it to the acid automatic regulating valve, controls the opening of the acid automatic regulating valve, controls the flow rate of the acid in the acid storage container in the pipeline, and adjusts the pH value of the spraying liquid in the pickling tower. S2. The second high-precision pH detector detects the pH value of the circulating liquid in the alkali washing tower, transmits the pH value of the circulating liquid to the pH control and display through the signal line, sets the pH control range in advance in the pH control and display, and the pH control and display compares the pH value of the circulating liquid detected by the second high-precision pH detector with the set pH. According to the comparison result, the output signal is transmitted to the alkali automatic regulating valve to control the opening of the alkali automatic regulating valve, so as to control the flow rate of the acid and alkali solution in the alkali storage container in the pipeline and adjust the pH value of the spraying liquid in the alkali washing tower.

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