Automatic slurry supply system and method of absorption tower

Abstract

The invention discloses an automatic slurry supply system and method of an absorption tower, and relates to the technical field of absorption towers, the automatic slurry supply system comprises a primary absorption tower, a secondary absorption tower and a central controller, the absorption tower is connected in series with a boiler flue gas outlet pipeline, and the pipeline is provided with a flowmeter. The absorption tower is connected with the primary slurry storage tank and the secondary slurry storage tank through a slurry supply conveying pipeline, and a slurry supply electric adjusting door, a bypass and a standby door are arranged in the pipeline. An inlet of the slurry storage tank is connected with a slurry making device through a slurry making pipeline; and a multifunctional water quality monitor and all parts in the absorption tower are wirelessly connected to a central controller. And the central controller calculates the maximum value and the minimum value and the opening value of the slurry supply electric adjusting door, adjusts the opening according to the pH value range, and regularly maintains equipment and processes faults. The slurry supply amount can be accurately controlled, the system reliability is improved, and the slurry quality and the system safety are guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of absorption towers, and in particular to an automatic slurry supply system and method for an absorption tower. Background Art

[0002] For a long time, the desulfurization absorber slurry supply system has been unable to achieve automatic slurry supply adjustment, relying on the on-duty personnel to manually adjust the slurry supply to maintain the pH value in the desulfurization absorber within the specified range. Due to manual adjustment, the slurry flow rate is often inappropriate, or the operation is not timely for a long time, which can easily cause the pH value in the desulfurization absorber to fluctuate greatly, exceeding the allowable range of the regulations, and even causing the desulfurization absorber slurry poisoning or environmental protection parameters exceeding the standard in severe cases. At the same time, it also causes too much energy involvement for the monitoring personnel, which is not conducive to the safe and stable operation of the unit.

[0003] The electric regulating valve in the original slurry supply pipeline, during the adjustment process, firstly, lagged behind the control of the environmental protection parameters on site, secondly, the adjustment response was slow and could not meet the actual application, and thirdly, the slurry supply pipeline contained high-density slurry, and the automatic adjustment had to take into account the flow rate of the medium in the pipeline to prevent precipitation and pipe blockage. The original automatic adjustment could not meet the actual needs of the site, resulting in the long-term occupation of a large amount of manpower and energy for slurry supply adjustment, which not only increased the inaccuracy of manual adjustment, but also increased the probability of human error. Summary of the invention

[0004] The object of the present invention is to provide an automatic slurry supply system and method for an absorption tower, wherein each unit uses a set of limestone slurry making system, limestone is prepared into slurry through the slurry making device, and is fed into the absorption tower through a slurry supply pump. Each unit is equipped with two limestone slurry pumps, and a regulating valve is installed on the delivery pipeline to adjust the slurry supply amount of the absorption tower.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] An automatic slurry supply system for an absorption tower includes a primary absorption tower, a secondary absorption tower and a central controller, wherein the primary absorption tower and the secondary absorption tower are connected in series to a boiler flue gas outlet pipe. The primary absorption tower and the secondary absorption tower here mainly process boiler flue gas, and the effect of flue gas treatment can be improved by connecting them in series. A flow meter is installed on the boiler flue gas outlet pipe, and the data of flue gas flow rate is collected by the flow meter. The primary absorption tower and the secondary absorption tower are respectively connected to the primary slurry storage tank outlet end and the secondary slurry storage tank outlet end through a slurry supply and delivery pipeline, and a slurry supply electric regulating door is installed in the slurry supply and delivery pipeline. The function of the slurry supply and delivery pipeline is to transport the slurry in the slurry storage tank to the absorption tower, and the slurry supply electric regulating door can control the flow rate of the slurry. The inlet end of the primary slurry storage tank and the inlet end of the secondary slurry storage tank are both connected to a slurry making device through a slurry making pipeline. The slurry making device prepares limestone and water into a slurry of a certain concentration, and transports it to the slurry storage tank through a slurry making pipeline. A pH monitor is installed in the primary absorption tower and the secondary absorption tower, and the pH monitor and the electric regulating door are wirelessly connected to the central controller. The pH monitor can monitor the pH value of the slurry in the absorption tower in real time and transmit the data to the central controller. The central controller controls the opening of the slurry supply electric regulating door according to the pH value, thereby adjusting the slurry supply amount.

[0007] A stirring device is installed inside the primary slurry storage tank and the secondary slurry storage tank. The function of the stirring device is to prevent the slurry from settling and ensure the uniform concentration of the slurry.

[0008] The central controller is connected to a display panel, which can display information such as the pH value, liquid level, and opening of the slurry supply electric regulating door in the absorption tower, so as to facilitate monitoring by the monitoring personnel.

[0009] A bypass slurry supply pipeline is connected in parallel to the slurry supply electric regulating door installed in the slurry supply pipeline, and a spare slurry supply electric regulating door is installed in the parallel bypass slurry supply pipeline. The spare slurry supply electric regulating door can be put into use when the main slurry supply electric regulating door fails to ensure the normal operation of the system.

[0010] The pulping device adds limestone and water to prepare a slurry with a concentration of 19%-21%. The slurry with this concentration can effectively absorb harmful substances in the flue gas.

[0011] The inlet end of the first-stage slurry storage tank and the inlet end of the second-stage slurry storage tank are connected to the slurry making device through a slurry making pipeline, and a water pump and a valve are installed in the slurry making pipeline. The water pump is used to transport the slurry in the slurry making device to the slurry storage tank, and the valve can control the flow rate of the slurry.

[0012] The slurry supply and delivery pipeline and the slurry making pipeline are equipped with explosion-proof valves, which can automatically open when the pressure in the pipeline is too high to release the pressure and prevent the pipeline from exploding.

[0013] An automatic slurry supply method for an absorption tower, characterized in that it comprises the following steps:

[0014] S1, a multifunctional water quality monitor is installed in the absorption tower to monitor the pH value and liquid level of the slurry in the absorption tower in real time, a flow meter is installed on the boiler flue gas outlet pipe to detect the flue gas flow rate, and the data is transmitted to the central controller through wireless connection;

[0015] S2, set the comprehensive variable T, the formula of comprehensive variable T is as follows:

[0016]

[0017] Among them, w1, w2, and w3 are preset weight coefficients, w1 is 0.5, w2 is 0.2, and w3 is 0.3, pH is the pH value, h is the liquid level height, and v is the flue gas flow rate;

[0018] S3, the running system calculates the comprehensive variable T and obtains its maximum value T max With the minimum value T min ; The formula for calculating the opening value of the electric regulating door of the first-level slurry storage tank is as follows;

[0019] Lower limit opening value L1:

[0020]

[0021] Middle limit opening value M1:

[0022]

[0023] Upper limit opening value U1:

[0024]

[0025] The comprehensive variable T is a real-time value, T max is the maximum value during operation, T min is the minimum value during the operation period, α is the nonlinear degree of the opening value changing with the comprehensive variable T, and its value is 0.4, p1 is the maximum value of the lower limit opening value of the electric regulating door for slurry supply of the first-level slurry storage tank set artificially, p2 is the minimum value of the middle limit opening value of the electric regulating door for slurry supply of the first-level slurry storage tank set artificially, p3 is the maximum value of the middle limit opening value of the electric regulating door for slurry supply of the first-level slurry storage tank set artificially, and p4 is the minimum value of the upper limit opening value of the electric regulating door for slurry supply of the first-level slurry storage tank set artificially;

[0026] The formula for calculating the opening value of the electric regulating door for the slurry supply of the secondary slurry storage tank is as follows;

[0027] Lower limit opening value L2:

[0028]

[0029] Middle limit opening value M2:

[0030]

[0031] Upper limit opening value U2:

[0032]

[0033] The comprehensive variable T is a real-time value, T max is the maximum value during operation, T min is the minimum value during the operation period, α is the nonlinear degree of the opening value changing with the comprehensive variable T, and its value is 0.4, q1 is the maximum value of the lower limit opening value of the electric regulating door for slurry supply of the secondary slurry storage tank set artificially, q2 is the minimum value of the middle limit opening value of the electric regulating door for slurry supply of the secondary slurry storage tank set artificially, q3 is the maximum value of the middle limit opening value of the electric regulating door for slurry supply of the secondary slurry storage tank set artificially, and q4 is the minimum value of the upper limit opening value of the electric regulating door for slurry supply of the secondary slurry storage tank set artificially;

[0034] S4, judging the pH value range, the central controller receives the data of the multifunctional water quality monitor, and judges the pH value range in the current absorption tower according to the set upper and lower limits of the pH value to adjust the opening of the slurry supply electric regulating door; when the pH value is less than the lower limit of the set value, the central controller sends a command to the slurry supply electric regulating door to automatically open to the upper limit opening value, when the lower limit of the set value is less than the pH value and the upper limit of the set value, the central controller automatically opens to the middle limit opening value, and when the pH value is greater than the upper limit of the set value, the central controller automatically closes to the lower limit opening value;

[0035] S5. The monitoring personnel shall regularly perform maintenance and inspection on the absorption tower, slurry storage tank, slurry supply electric regulating door, slurry making device and other equipment to ensure the normal operation of the equipment; clean the multi-functional water quality monitoring instrument to ensure its accurate and reliable measurement; when the system fails, sound the alarm and take corresponding troubleshooting measures, and manually close the equipment and valves.

[0036] The upper, middle and lower limit opening values ​​of the slurry supply electric regulating door can be adjusted according to actual conditions to meet different operating conditions.

[0037] Each absorption tower is provided with an electric regulating door for slurry supply, wherein a standby electric regulating door for slurry supply is used for standby.

[0038] The automatic slurry supply system and method of the absorption tower are realized through the following mechanism. First, the primary and secondary absorption towers are connected in series to the boiler flue gas outlet pipe to efficiently treat the flue gas. The pulping device mixes limestone and water into a slurry with a concentration of 19%-21%, which is transported to the primary and secondary slurry storage tanks through the pulping pipeline. The pH monitor installed in the absorption tower monitors the slurry pH value and liquid level in real time, and transmits the data wirelessly to the central controller. The central controller adjusts the opening value of the slurry supply electric regulating door in the slurry supply pipeline according to the collected data to achieve automatic slurry supply adjustment. At the same time, the stirring device in the slurry storage tank prevents slurry precipitation and ensures uniform concentration; the bypass and spare slurry supply electric regulating door next to the slurry supply pipeline ensure the normal operation of the system when the main door fails; the water pump and valve in the pulping pipeline control the slurry flow; the explosion-proof valves of the slurry supply and pulping pipelines prevent pipeline explosions. The display panel connected to the central controller can display relevant information for monitoring personnel. In addition, in the automatic slurry supply method, through real-time monitoring and data transmission, setting the opening value of the slurry supply electric adjustment door, automatically adjusting the opening according to the pH value range, fine-tuning by the monitoring personnel according to the unit operating conditions and regular maintenance and inspection, etc., the system is ensured to operate stably and the slurry supply to the absorption tower is accurately controlled.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] The comprehensive variable T is set, which comprehensively considers multiple factors such as the pH value of the slurry, the liquid level height, and the flue gas flow rate, and reflects the influence of each factor on the system through the preset weight coefficient. The control method that comprehensively considers multiple factors can more comprehensively and accurately reflect the actual working conditions in the absorption tower compared to considering only a single factor, thereby achieving more accurate slurry supply control.

[0041] Each absorption tower is equipped with a main slurry supply electric regulating door and a backup slurry supply electric regulating door. When the main door fails, the backup door can be put into use in time, ensuring the reliability and stability of the system operation and reducing the risk of production interruption caused by slurry supply failure.

[0042] The stirring devices inside the primary slurry storage tank and the secondary slurry storage tank effectively prevent the slurry from settling, ensure the uniformity of the slurry concentration, and improve the quality and use effect of the slurry.

[0043] The pulping device can mix limestone and water into a slurry of a specific concentration between 19% and 21%, which can more effectively absorb and treat harmful substances in flue gas. Compared with the existing technology, it improves the treatment effect while reducing the waste of raw materials such as limestone.

[0044] The central controller is connected to the display panel, which allows the monitoring personnel to monitor key information such as the pH value, liquid level, and slurry supply electric adjustment door opening in the absorption tower in real time, so that the operator can understand the system operation status in a timely manner and make accurate judgments and adjustments, greatly improving the convenience and safety of operation.

[0045] The explosion-proof valves installed on the slurry supply pipeline and the slurry production pipeline automatically open to release the pressure when the pipeline pressure is too high, effectively preventing the occurrence of safety accidents such as pipeline explosions and providing reliable safety protection for the production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 This is a diagram of an automatic slurry supply system for an absorption tower of the present invention;

[0047] In the figure: 11. Primary absorption tower; 12. Secondary absorption tower; 13. Boiler flue gas outlet pipe; 14. Flow meter; 21. Primary slurry storage tank; 22. Secondary slurry storage tank; 3. Electric regulating door for slurry supply; 31. Electric regulating door for standby slurry supply; 4. Slurry making device; 5. Multifunctional water quality monitor; 6. Central controller; 7. Display panel; 8. Explosion-proof valve. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present invention will be fully described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0049] like Figure 1 As shown, an automatic slurry supply system for an absorption tower includes a primary absorption tower 11, a secondary absorption tower 12 and a central controller 6, wherein the primary absorption tower 11 and the secondary absorption tower 12 are connected in series to a boiler flue gas outlet pipe 13; characterized in that a flow meter 14 is installed on the boiler flue gas outlet pipe 13, the primary absorption tower 11 and the secondary absorption tower 12 are respectively connected to the outlet end of a primary slurry tank 21 and the outlet end of a secondary slurry tank 22 through a slurry supply and delivery pipe, a slurry supply electric regulating door 3 is installed in the slurry supply and delivery pipe, and the inlet end of the primary slurry tank 21 and the inlet end of the secondary slurry tank 22 are both connected to a slurry making device 4 through a slurry making pipe; a multifunctional water quality monitor 5 is installed in the primary absorption tower 11 and the secondary absorption tower 12, and the multifunctional water quality monitor 5 and the electric regulating door 3 are wirelessly connected to the central controller 6.

[0050] A stirring device is installed inside the primary slurry storage tank 21 and the secondary slurry storage tank 22.

[0051] The central controller 6 is connected to the display panel 7 .

[0052] A slurry supply electric regulating door 3 installed in the slurry supply delivery pipeline is connected in parallel to a bypass slurry supply delivery pipeline, and a spare slurry supply electric regulating door 31 is installed in the parallel bypass slurry supply delivery pipeline.

[0053] The pulping device 4 adds limestone and water to prepare a slurry with a concentration of 19%-21%.

[0054] The inlet end of the first-stage slurry storage tank 21 and the inlet end of the second-stage slurry storage tank 22 are connected to the slurry making device 4 through a slurry making pipeline, and a water pump and a valve are installed in the slurry making pipeline.

[0055] The slurry supply and delivery pipeline and the slurry production pipeline are installed with explosion-proof valves 8.

[0056] An automatic slurry supply method for an absorption tower, characterized in that it comprises the following steps:

[0057] S1, a multifunctional water quality monitor 5 is installed in the absorption tower to monitor the pH value and liquid level of the slurry in the absorption tower in real time, a flow meter 14 is installed on the boiler flue gas outlet pipe 13 to detect the flue gas flow rate, and the data is transmitted to the central controller 6 through a wireless connection;

[0058] S2, set the comprehensive variable T, the formula of comprehensive variable T is as follows:

[0059]

[0060] Among them, w1, w2, and w3 are preset weight coefficients, w1 is 0.5, w2 is 0.2, and w3 is 0.3, pH is the pH value, h is the liquid level height, and v is the flue gas flow rate;

[0061] S3, the running system calculates the comprehensive variable T and obtains its maximum value T max With the minimum value T min ; The formula for calculating the opening value of the electric regulating door of the first-level slurry storage tank is as follows;

[0062] Lower limit opening value L1:

[0063]

[0064] Middle limit opening value M1:

[0065]

[0066] Upper limit opening value U1:

[0067]

[0068] The comprehensive variable T is a real-time value, T max is the maximum value during operation, T minis the minimum value during operation, α is the nonlinear degree of the opening value changing with the comprehensive variable T, and its value is 0.4, p1 is the maximum value of the lower limit opening value of the electric regulating door for slurry supply of the first-level slurry storage tank set artificially, p2 is the minimum value of the middle limit opening value of the electric regulating door for slurry supply of the first-level slurry storage tank set artificially, p3 is the maximum value of the middle limit opening value of the electric regulating door for slurry supply of the first-level slurry storage tank set artificially, and p4 is the minimum value of the upper limit opening value of the electric regulating door for slurry supply of the first-level slurry storage tank set artificially;

[0069] The formula for calculating the opening value of the electric regulating door for the slurry supply of the secondary slurry storage tank is as follows;

[0070] Lower limit opening value L2:

[0071]

[0072] Middle limit opening value M2:

[0073]

[0074] Upper limit opening value U2:

[0075]

[0076] The comprehensive variable T is a real-time value, T max is the maximum value during operation, T min is the minimum value during the operation period, α is the nonlinear degree of the opening value changing with the comprehensive variable T, and its value is 0.4, q1 is the maximum value of the lower limit opening value of the electric regulating door for slurry supply of the secondary slurry storage tank set artificially, q2 is the minimum value of the middle limit opening value of the electric regulating door for slurry supply of the secondary slurry storage tank set artificially, q3 is the maximum value of the middle limit opening value of the electric regulating door for slurry supply of the secondary slurry storage tank set artificially, and q4 is the minimum value of the upper limit opening value of the electric regulating door for slurry supply of the secondary slurry storage tank set artificially;

[0077] S4, judging the pH value range, the central controller 6 receives the data of the multifunctional water quality monitor 5, and judges the range of the pH value in the current absorption tower according to the set upper and lower limits of the pH value to adjust the opening of the slurry supply electric regulating door 3; when the pH value is less than the lower limit of the set value, the central controller 6 sends a command to the slurry supply electric regulating door to automatically open to the upper limit opening value, when the lower limit of the set value is less than the pH value and the upper limit of the set value, the central controller 6 automatically opens to the middle limit opening value, and when the pH value is greater than the upper limit of the set value, the central controller 6 automatically closes to the lower limit opening value;

[0078] S5. The monitoring personnel shall regularly perform maintenance and inspection on the absorption tower, slurry storage tank, slurry supply electric regulating door 3, slurry making device 4 and other equipment to ensure the normal operation of the equipment; clean the multi-functional water quality monitoring instrument to ensure its accurate and reliable measurement; when the system fails, sound the alarm and take corresponding troubleshooting measures, and manually close the equipment and valves.

[0079] The upper, middle and lower limit opening values ​​of the slurry supply electric regulating door 3 can be adjusted according to actual conditions to meet different operating conditions.

[0080] Each absorption tower 11 is provided with an electric slurry supply regulating door, wherein a standby electric slurry supply regulating door 31 is used for standby.

[0081] First, the primary absorption tower 11 and the secondary absorption tower 12 are closely connected in series to the boiler flue gas outlet pipe 13. The two absorption towers are connected to the outlet end of the primary slurry storage tank 21 and the outlet end of the secondary slurry storage tank 22 through the slurry supply and delivery pipeline. In the slurry supply and delivery pipeline, a slurry supply electric regulating door 3 is installed, and a bypass slurry supply and delivery pipeline is also connected in parallel to the side thereof. A backup slurry supply electric regulating door 31 is installed in this parallel bypass slurry supply and delivery pipeline. Such a design ensures that when the main slurry supply electric regulating door fails, the backup door can be put into use in time, greatly improving the reliability of system operation.

[0082] At the same time, the inlet end of the primary slurry storage tank 21 and the inlet end of the secondary slurry storage tank 22 are both connected to the slurry device 4 through the slurry pipeline. In the slurry pipeline, a water pump and a valve are installed. The water pump is responsible for transporting the slurry prepared in the slurry device 4 to the slurry storage tank, and the valve can effectively control the flow rate of the slurry. In addition, pH monitors 5 are installed inside the primary absorption tower 11 and the secondary absorption tower 12. These monitors can monitor the pH value and liquid level of the slurry in the absorption tower in real time. A flow meter 14 is installed on the boiler flue gas outlet pipe 13. The flow meter 14 collects the data of the flue gas flow rate and transmits the data to the central controller 6 through a wireless connection. The central controller 6 is connected to the display panel 7, so that the monitoring personnel can easily view various key information in the absorption tower.

[0083] An explosion-proof valve 8 is also installed on the slurry supply pipeline and the slurry pipeline. Once the pressure in the pipeline is too high, the explosion-proof valve will automatically open to release the pressure, thereby effectively preventing safety accidents such as pipeline explosions. The slurry making device 4 will mix limestone and water into a slurry with a concentration between 19% and 21%, which can more efficiently absorb and treat harmful substances in the flue gas.

[0084] During the slurry supply process, the central controller 6 calculates the real-time value of the comprehensive variable T according to the formula of the comprehensive variable T based on the received data. At the same time, the maximum and minimum values ​​of the comprehensive variable T during operation are calculated. The opening value (lower limit opening value, middle limit opening value, upper limit opening value) of the electric regulating door of the slurry supply of the first-level slurry storage tank is calculated according to the real-time value of the comprehensive variable T and the opening value formula of the electric regulating door of the slurry supply of the first-level slurry storage tank. Similarly, the opening value (lower limit opening value, middle limit opening value, upper limit opening value) of the electric regulating door of the slurry supply of the second-level slurry storage tank is calculated according to the real-time value of the comprehensive variable T and the opening value formula of the electric regulating door of the slurry supply of the second-level slurry storage tank. The central controller 6 sends an instruction to the electric regulating door 3 for slurry supply according to the calculated opening value of the electric regulating door for slurry supply. When the pH value is less than the lower limit of the set value, the central controller 6 sends an instruction to the electric regulating door for slurry supply to automatically open to the upper limit opening value. When the lower limit of the set value is less than the pH value and the upper limit of the set value, the central controller 6 automatically opens to the middle limit opening value. When the pH value is greater than the upper limit of the set value, the central controller 6 automatically closes to the lower limit opening value. When a system failure occurs, the alarm is raised in time and corresponding fault handling measures are taken to manually close the equipment and valves.

Claims

1. An automatic slurry supply system for an absorption tower, comprising a primary absorption tower (11), a secondary absorption tower (12) and a central controller (6), wherein the primary absorption tower (11) and the secondary absorption tower (12) are connected in series to a boiler flue gas outlet pipe (13); characterized in that: A flow meter (14) is installed on the boiler flue gas outlet pipe (13); the first-level absorption tower (11) and the second-level absorption tower (12) are connected to the outlet end of the first-level slurry storage tank (21) and the outlet end of the second-level slurry storage tank (22) respectively through a slurry supply and delivery pipe; a slurry supply electric regulating door (3) is installed in the slurry supply and delivery pipe; the inlet end of the first-level slurry storage tank (21) and the inlet end of the second-level slurry storage tank (22) are both connected to the slurry making device (4) through a slurry making pipe; a multifunctional water quality monitor (5) is installed in the first-level absorption tower (11) and the second-level absorption tower (12); the multifunctional water quality monitor (5) and the electric regulating door (3) are wirelessly connected to a central controller (6).

2. The automatic slurry supply system for an absorption tower according to claim 1, characterized in that: A stirring device is installed inside the first-level slurry storage tank (21) and the second-level slurry storage tank (22).

3. The automatic slurry supply system for an absorption tower according to claim 1, characterized in that: The central controller (6) is connected to a display panel (7).

4. The automatic slurry supply system for an absorption tower according to claim 1, characterized in that: A bypass slurry supply and delivery pipeline is connected in parallel to the slurry supply electric regulating door (3) installed in the slurry supply and delivery pipeline, and a spare slurry supply electric regulating door (31) is installed in the parallel bypass slurry supply and delivery pipeline.

5. The automatic slurry supply system for an absorption tower according to claim 1, characterized in that: The pulping device (4) adds limestone and water to prepare a slurry with a concentration of 19%-21%.

6. The automatic slurry supply system for an absorption tower according to claim 1, characterized in that: The inlet end of the first-stage pulp storage tank (21) and the inlet end of the second-stage pulp storage tank (22) are connected to the pulping device (4) through a pulping pipeline, and a water pump and a valve are installed in the pulping pipeline.

7. The automatic slurry supply system for an absorption tower according to claim 1, characterized in that: The slurry supply and delivery pipeline and the slurry production pipeline are installed with explosion-proof valves (8).

8. An automatic slurry supply method for an absorption tower, comprising the automatic slurry supply system according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1, a multifunctional water quality monitor (5) is installed in the absorption tower to monitor the pH value and liquid level of the slurry in the absorption tower in real time, a flow meter (14) is installed on the boiler flue gas outlet pipe (13) to detect the flue gas flow rate, and the data is transmitted to the central controller (6) via a wireless connection; S2, set the comprehensive variable T, the formula of comprehensive variable T is as follows: Among them, w1, w2, and w3 are preset weight coefficients, w1 is 0.5, w2 is 0.2, and w3 is 0.3, pH is the pH value, h is the liquid level height, and v is the flue gas flow rate; S3, the running system calculates the comprehensive variable T and obtains its maximum value T max With the minimum value T min ; The formula for calculating the opening value of the electric regulating door of the first-level slurry storage tank is as follows; Lower limit opening value L1: Middle limit opening value M1: Upper limit opening value U1: The comprehensive variable T is a real-time value, T max is the maximum value during operation, T min is the minimum value during the operation period, α is the nonlinear degree of the opening value changing with the comprehensive variable T, and its value is 0.4, p1 is the maximum value of the lower limit opening value of the electric regulating door for slurry supply of the first-level slurry storage tank set artificially, p2 is the minimum value of the middle limit opening value of the electric regulating door for slurry supply of the first-level slurry storage tank set artificially, p3 is the maximum value of the middle limit opening value of the electric regulating door for slurry supply of the first-level slurry storage tank set artificially, and p4 is the minimum value of the upper limit opening value of the electric regulating door for slurry supply of the first-level slurry storage tank set artificially; The formula for calculating the opening value of the electric regulating door for the slurry supply of the secondary slurry storage tank is as follows; Lower limit opening value L2: Middle limit opening value M2: Upper limit opening value U2: The comprehensive variable T is a real-time value, T max is the maximum value during operation, T min is the minimum value during the operation period, α is the nonlinear degree of the opening value changing with the comprehensive variable T, and its value is 0.4, q1 is the maximum value of the lower limit opening value of the electric regulating door for slurry supply of the secondary slurry storage tank set artificially, q2 is the minimum value of the middle limit opening value of the electric regulating door for slurry supply of the secondary slurry storage tank set artificially, q3 is the maximum value of the middle limit opening value of the electric regulating door for slurry supply of the secondary slurry storage tank set artificially, and q4 is the minimum value of the upper limit opening value of the electric regulating door for slurry supply of the secondary slurry storage tank set artificially; S4, judging the pH value range, the central controller (6) receives data from the multifunctional water quality monitor (5), and judges the pH value range in the current absorption tower according to the set pH value upper and lower limits, and adjusts the opening of the slurry supply electric regulating door (3); when the pH value is less than the set value lower limit, the central controller (6) sends a command to the slurry supply electric regulating door to automatically open to the upper limit opening value; when the set value lower limit is less than the pH value and the set value upper limit, the central controller (6) automatically opens to the middle limit opening value; when the pH value is greater than the set value upper limit, the central controller (6) automatically closes to the lower limit opening value; S5. The monitoring personnel shall regularly perform maintenance and inspection on the absorption tower, pulp storage tank, pulp supply electric regulating door (3), pulping device (4) and other equipment to ensure the normal operation of the equipment; clean the multifunctional water quality monitoring instrument to ensure its measurement is accurate and reliable; when the system fails, the alarm shall be sounded and corresponding troubleshooting measures shall be taken to manually close the equipment and valves.

9. The automatic slurry supply method for an absorption tower according to claim 1, characterized in that: The upper, middle and lower limit opening values ​​of the slurry supply electric regulating door (3) can be adjusted according to actual conditions to meet different operating conditions.

10. The automatic slurry supply method for an absorption tower according to claim 1, characterized in that: Each absorption tower (11) is provided with an electric slurry supply regulating door, wherein a standby electric slurry supply regulating door (31) is used for standby.

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