A method and system for improving overflow of an absorption tower in a limestone-gypsum desulfurization process

Abstract

The present invention relates to the field of wet desulfurization absorption tower control technology, and discloses a method and system for improving the overflow of an absorption tower in a limestone-gypsum desulfurization process, including: obtaining working state data of the absorption tower within a preset time, the working state data being the circulating slurry volume A, the inlet flue gas pressure B and the absorption tower liquid level C, determining the scheduling parameters of the absorption tower according to the working state data, controlling and managing the absorption tower according to the scheduling parameters of the absorption tower, setting the operating power of the slurry circulation pump according to the circulating slurry volume A, and setting the adjustment value of the unit load according to the inlet flue gas pressure B. The present application can effectively reduce the number of slurry overflows, reduce the pollution caused by slurry overflow to the environment, reduce the manpower consumption caused by flushing slurry, reduce the labor intensity of the staff, and at the same time ensure the normal switching of various equipment in the absorption tower, ensure the stable operation of the desulfurization system, and play an important role in preventing environmental protection data from exceeding the standard.

Description

Technical Field

[0001] The invention relates to the technical field of wet desulfurization absorption tower control, in particular to a method and system for improving overflow of an absorption tower in a limestone-gypsum desulfurization process. Background Art

[0002] The limestone-gypsum wet desulfurization process uses slurry desulfurization. The slurry in the absorption tower contains water, limestone, gypsum, calcium sulfite, smoke, heavy metal ions, oil and other harmful substances. The limestone is fully dissolved in the desulfurization process, the water is recycled, the gypsum is centrally processed and transported after dehydration, and the smoke, heavy metal ions, oil and other harmful substances are discharged after passing the wastewater treatment system and meeting the standards.

[0003] The liquid level of the slurry pool in the absorption tower needs to be controlled within a certain range (9.0m-10.0m). If the slurry is too low, it will be detrimental to the reaction effect of the desulfurization system and cause cavitation of the circulation pump; if the liquid level is too high, it will reduce the reaction space in the absorption zone and cause the slurry to enter the original flue. In order to prevent the liquid level of the absorption tower from being too high, the absorption tower is designed with an overflow pipe. When the liquid level is higher than a certain value, the slurry will flow out of the absorption tower from the overflow pipe. However, if the slurry overflows, the slurry in the absorption tower will be directly discharged to the ground, causing many hazards. First, because the overflow slurry cannot be recovered, it causes a waste of desulfurization raw materials; secondly, the treatment method after the slurry overflows is to flush it with process water and discharge it to the rainwater drainage system, which causes a waste of water resources, increases the burden on the rainwater system, and increases the workload of the operating personnel; finally, because the harmful substances in the slurry have not been effectively treated, it causes environmental pollution, so how to improve the overflow of the absorption tower has become the key to wet flue gas desulfurization control.

[0004] Therefore, how to provide a method for effectively controlling the overflow of the absorption tower is a technical problem that needs to be solved at present. Summary of the invention

[0005] The embodiment of the present invention provides a method and system for improving the overflow of an absorber in a limestone-gypsum desulfurization process, so as to solve the technical problems in the prior art of being unable to effectively control the overflow of the absorber, unable to prevent the overflow of the absorber slurry, and unable to ensure the normal operation of the absorber and the entire desulfurization system.

[0006] In order to achieve the above object, the present invention provides a method for improving the overflow of an absorption tower in a limestone-gypsum desulfurization process, the method comprising:

[0007] Step S1: obtaining the working status data of the absorption tower within a preset time, wherein the working status data includes the circulating slurry volume A, the inlet flue gas pressure B and the absorption tower liquid level C;

[0008] Step S2: determining the scheduling parameters of the absorption tower according to the working status data;

[0009] Step S3: controlling and managing the absorption tower according to the scheduling parameters of the absorption tower;

[0010] In the step S2, the operating power of the slurry circulation pump is set according to the circulating slurry amount A, and the adjustment value of the unit load is set according to the inlet flue gas pressure B.

[0011] In one embodiment, before determining the scheduling parameters of the absorption tower according to the working status data, the method further includes:

[0012] Determine whether the circulating slurry volume A is greater than the circulating slurry volume threshold L, if so, set the operating power of the slurry circulation pump according to the circulating slurry volume A, if not, send the circulating slurry volume A to the control terminal;

[0013] Determine whether the inlet flue gas pressure B is greater than the inlet flue gas pressure threshold M. If so, set the adjustment value of the unit load according to the inlet flue gas pressure B. If not, send the inlet flue gas pressure B to the control terminal;

[0014] Determine whether the absorption tower liquid level C is greater than the absorption tower liquid level threshold N. If so, control the absorption tower liquid level according to the control terminal. If not, send the absorption tower liquid level C to the control terminal.

[0015] In one of the embodiments, when the control terminal receives the circulating slurry volume A, the inlet flue gas pressure B and the absorption tower liquid level C, the oxidation fan is controlled to switch.

[0016] In one embodiment, when setting the operating power of the slurry circulation pump according to the circulating slurry amount A, it includes:

[0017] The operating power of the slurry circulation pump is set according to the circulating slurry volume difference between the circulating slurry volume A and the circulating slurry volume threshold L:

[0018] A preset circulation slurry volume difference matrix E is set as E(E1, E2, E3, E4), wherein E1 is a first preset circulation slurry volume difference, E2 is a second preset circulation slurry volume difference, E3 is a third preset circulation slurry volume difference, E4 is a fourth preset circulation slurry volume difference, and E1<E2<E3<E4;

[0019] The operating power matrix F of the preset slurry circulation pump is set to F(F1, F2, F3, F4, F5), wherein F1 is the operating power of the first preset slurry circulation pump, F2 is the operating power of the second preset slurry circulation pump, F3 is the operating power of the third preset slurry circulation pump, F4 is the operating power of the fourth preset slurry circulation pump, and F5 is the operating power of the fifth preset slurry circulation pump, and F1<F2<F3<F4<F5;

[0020] The operating power of the slurry circulation pump is set according to the relationship between the circulating slurry volume difference between the circulating slurry volume A and the circulating slurry volume threshold L and each preset circulating slurry volume difference:

[0021] When |AL|<E1, the operating power F1 of the first preset slurry circulation pump is selected as the operating power of the slurry circulation pump;

[0022] When E1≤|AL|<E2, the operating power F2 of the second preset slurry circulation pump is selected as the operating power of the slurry circulation pump;

[0023] When E2≤|AL|<E3, the operating power F3 of the third preset slurry circulation pump is selected as the operating power of the slurry circulation pump;

[0024] When E3≤|AL|<E4, the operating power F4 of the fourth preset slurry circulation pump is selected as the operating power of the slurry circulation pump;

[0025] When E4≤|AL|, the operating power F5 of the fifth preset slurry circulation pump is selected as the operating power of the slurry circulation pump.

[0026] In one embodiment, when setting the adjustment value of the unit load according to the inlet flue gas pressure B, it includes:

[0027] The adjustment value of the unit load is set according to the inlet flue gas pressure difference between the inlet flue gas pressure B and the inlet flue gas pressure threshold M:

[0028] Preset inlet smoke pressure difference matrix P, set P (P1, P2, P3, P4), where P1 is the first preset inlet smoke pressure difference, P2 is the second preset inlet smoke pressure difference, P3 is the third preset inlet smoke pressure difference, P4 is the fourth preset inlet smoke pressure difference, and P1 < P2 < P3 < P4;

[0029] The adjustment value matrix Q of the preset unit load is set to Q (Q1, Q2, Q3, Q4, Q5), wherein Q1 is the adjustment value of the first preset unit load, Q2 is the adjustment value of the second preset unit load, Q3 is the adjustment value of the third preset unit load, Q4 is the adjustment value of the fourth preset unit load, Q5 is the adjustment value of the fifth preset unit load, and Q1<Q2<Q3<Q4<Q5;

[0030] The adjustment value of the unit load is set according to the relationship between the inlet flue gas pressure difference between the inlet flue gas pressure B and the inlet flue gas pressure threshold M and each preset inlet flue gas pressure difference:

[0031] When |BM|<P1, the adjustment value Q1 of the first preset unit load is selected as the adjustment value of the unit load;

[0032] When P1≤|BM|<P2, the adjustment value Q2 of the second preset unit load is selected as the adjustment value of the unit load;

[0033] When P2≤|BM|<P3, the third preset unit load adjustment value Q3 is selected as the unit load adjustment value;

[0034] When P3≤|BM|<P4, the fourth preset unit load adjustment value Q4 is selected as the unit load adjustment value;

[0035] When P4≤|BM|, the fifth preset unit load adjustment value Q5 is selected as the unit load adjustment value.

[0036] In order to achieve the above object, the present invention provides a system for improving the overflow of an absorption tower in a limestone-gypsum desulfurization process, the system comprising:

[0037] An acquisition module is used to acquire the working status data of the absorption tower within a preset time, wherein the working status data are the circulating slurry volume A, the inlet flue gas pressure B and the absorption tower liquid level C;

[0038] A determination module, used to determine the scheduling parameters of the absorption tower according to the working status data;

[0039] A control module, used for controlling and managing the absorption tower according to the scheduling parameters of the absorption tower;

[0040] In the determination module, the operating power of the slurry circulation pump is set according to the circulating slurry volume A, and the adjustment value of the unit load is set according to the inlet flue gas pressure B.

[0041] In one embodiment, before the determination module determines the scheduling parameters of the absorption tower according to the working status data, it also includes:

[0042] The determination module determines whether the circulating slurry volume A is greater than the circulating slurry volume threshold L. If so, the operating power of the slurry circulation pump is set according to the circulating slurry volume A. If not, the circulating slurry volume A is sent to the control terminal;

[0043] The determination module determines whether the inlet flue gas pressure B is greater than the inlet flue gas pressure threshold M. If so, the adjustment value of the unit load is set according to the inlet flue gas pressure B. If not, the inlet flue gas pressure B is sent to the control terminal;

[0044] The determination module determines whether the absorption tower liquid level C is greater than the absorption tower liquid level threshold N. If so, the absorption tower liquid level is controlled according to the control terminal. If not, the absorption tower liquid level C is sent to the control terminal.

[0045] In one of the embodiments, in the control module, when the control terminal receives the circulating slurry volume A, the inlet flue gas pressure B and the absorption tower liquid level C, the oxidation fan is controlled to switch.

[0046] In one embodiment, when the determination module sets the operating power of the slurry circulation pump according to the circulating slurry amount A, it includes:

[0047] The determination module is used to set the operating power of the slurry circulation pump according to the circulating slurry volume difference between the circulating slurry volume A and the circulating slurry volume threshold L:

[0048] The determination module is used to preset a circulating slurry volume difference matrix E, and set E(E1, E2, E3, E4), wherein E1 is a first preset circulating slurry volume difference, E2 is a second preset circulating slurry volume difference, E3 is a third preset circulating slurry volume difference, and E4 is a fourth preset circulating slurry volume difference, and E1<E2<E3<E4;

[0049] The determination module is used to preset the operating power matrix F of the slurry circulation pump, and set F(F1, F2, F3, F4, F5), wherein F1 is the operating power of the first preset slurry circulation pump, F2 is the operating power of the second preset slurry circulation pump, F3 is the operating power of the third preset slurry circulation pump, F4 is the operating power of the fourth preset slurry circulation pump, and F5 is the operating power of the fifth preset slurry circulation pump, and F1<F2<F3<F4<F5;

[0050] The determination module is further used to set the operating power of the slurry circulation pump according to the relationship between the circulating slurry volume difference between the circulating slurry volume A and the circulating slurry volume threshold L and each preset circulating slurry volume difference:

[0051] When |AL|<E1, the operating power F1 of the first preset slurry circulation pump is selected as the operating power of the slurry circulation pump;

[0052] When E1≤|AL|<E2, the operating power F2 of the second preset slurry circulation pump is selected as the operating power of the slurry circulation pump;

[0053] When E2≤|AL|<E3, the operating power F3 of the third preset slurry circulation pump is selected as the operating power of the slurry circulation pump;

[0054] When E3≤|AL|<E4, the operating power F4 of the fourth preset slurry circulation pump is selected as the operating power of the slurry circulation pump;

[0055] When E4≤|AL|, the operating power F5 of the fifth preset slurry circulation pump is selected as the operating power of the slurry circulation pump.

[0056] In one embodiment, when the determination module sets the adjustment value of the unit load according to the inlet flue gas pressure B, it includes:

[0057] The determination module is used to set the adjustment value of the unit load according to the inlet flue gas pressure difference between the inlet flue gas pressure B and the inlet flue gas pressure threshold M:

[0058] The determination module is used to preset the inlet smoke pressure difference matrix P, set P (P1, P2, P3, P4), wherein P1 is the first preset inlet smoke pressure difference, P2 is the second preset inlet smoke pressure difference, P3 is the third preset inlet smoke pressure difference, P4 is the fourth preset inlet smoke pressure difference, and P1<P2<P3<P4;

[0059] The determination module is used to preset the adjustment value matrix Q of the unit load, and set Q (Q1, Q2, Q3, Q4, Q5), wherein Q1 is the adjustment value of the first preset unit load, Q2 is the adjustment value of the second preset unit load, Q3 is the adjustment value of the third preset unit load, Q4 is the adjustment value of the fourth preset unit load, Q5 is the adjustment value of the fifth preset unit load, and Q1<Q2<Q3<Q4<Q5;

[0060] The determination module is further used to set the adjustment value of the unit load according to the relationship between the inlet flue gas pressure difference between the inlet flue gas pressure B and the inlet flue gas pressure threshold M and each preset inlet flue gas pressure difference:

[0061] When |BM|<P1, the adjustment value Q1 of the first preset unit load is selected as the adjustment value of the unit load;

[0062] When P1≤|BM|<P2, the adjustment value Q2 of the second preset unit load is selected as the adjustment value of the unit load;

[0063] When P2≤|BM|<P3, the third preset unit load adjustment value Q3 is selected as the unit load adjustment value;

[0064] When P3≤|BM|<P4, the fourth preset unit load adjustment value Q4 is selected as the unit load adjustment value;

[0065] When P4≤|BM|, the fifth preset unit load adjustment value Q5 is selected as the unit load adjustment value.

[0066] The present invention provides a method and system for improving the overflow of an absorption tower in a limestone-gypsum desulfurization process, which has the following beneficial effects compared with the prior art:

[0067] The present invention discloses a method and system for improving the overflow of an absorber in a limestone-gypsum desulfurization process, comprising: obtaining working state data of the absorber within a preset time, the working state data being the circulating slurry volume A, the inlet flue gas pressure B and the absorber liquid level C, determining the dispatching parameters of the absorber according to the working state data, controlling and managing the absorber according to the dispatching parameters of the absorber, setting the operating power of the slurry circulation pump according to the circulating slurry volume A, and setting the adjustment value of the unit load according to the inlet flue gas pressure B. The present application can effectively reduce the number of slurry overflows, reduce the pollution caused by slurry overflows to the environment, reduce the manpower consumption caused by flushing slurry, reduce the labor intensity of the staff, and at the same time ensure the normal switching of each device in the absorber, ensure the stable operation of the desulfurization system, and play an important role in preventing environmental protection data from exceeding the standard. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] Figure 1 A schematic flow chart of a method for improving overflow of an absorption tower in a limestone-gypsum desulfurization process according to an embodiment of the present invention is shown;

[0069] Figure 2 yes Figure 1 A detailed flow chart of a specific embodiment;

[0070] Figure 3 The present invention shows a schematic structural diagram of a system for improving the overflow of an absorption tower in a limestone-gypsum desulfurization process according to an embodiment of the present invention. DETAILED DESCRIPTION

[0071] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0072] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0073] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0074] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0075] The following is a description of preferred embodiments of the present invention with reference to the accompanying drawings.

[0076] like Figure 1 As shown, an embodiment of the present invention discloses a method for improving the overflow of an absorption tower in a limestone-gypsum desulfurization process, the method comprising:

[0077] Step S1: obtaining the working status data of the absorption tower within a preset time, wherein the working status data includes the circulating slurry volume A, the inlet flue gas pressure B and the absorption tower liquid level C;

[0078] Step S2: determining the scheduling parameters of the absorption tower according to the working status data;

[0079] Step S3: controlling and managing the absorption tower according to the scheduling parameters of the absorption tower;

[0080] In the step S2, the operating power of the slurry circulation pump is set according to the circulating slurry amount A, and the adjustment value of the unit load is set according to the inlet flue gas pressure B.

[0081] It should be noted that the main process flow in the absorption tower is as follows:

[0082] (1) Flue gas flow: After the flue gas enters the absorption tower, it is reversely mixed with the atomized slurry in the absorption zone. The SO2 in the flue gas is absorbed by the slurry during this process. The water in the flue gas is then removed by the demister, and clean flue gas is discharged.

[0083] (2) Slurry circulation spraying: The slurry in the absorption tower is transported to the top of the absorption tower by the circulation pump, atomized after passing through the spray layer, and sprayed from top to bottom to react with the flue gas to achieve the purpose of flue gas desulfurization.

[0084] (3) Oxidation by oxidation fan: The slurry after reaction with flue gas returns to the slurry pool, is neutralized by limestone slurry, and is oxidized by oxidizing air to generate stable gypsum crystals (CaSO4·2H2O). In order to ensure the oxidation reaction effect and gypsum quality, it is necessary to start the oxidation fan to continuously blow oxidizing air into the slurry in the absorption tower.

[0085] (4) Absorber liquid level control: The liquid level of the absorber slurry pool needs to be controlled within a certain range (9.0m-10.0m). If the slurry is too low, it will be detrimental to the desulfurization system reaction effect and cause cavitation of the slurry circulation pump; if the liquid level is too high, it will reduce the reaction space in the absorption zone and cause the slurry to enter the original flue. In order to prevent the absorber liquid level from being too high, an overflow pipe is designed for the absorber. When the liquid level is higher than a certain value, the slurry will flow out of the absorber from the overflow pipe.

[0086] In this embodiment, by obtaining the working status data of the absorber within a preset time, the working status data is the circulating slurry volume A, the inlet flue gas pressure B and the absorber liquid level C, the scheduling parameters of the absorber are determined according to the working status data, the absorber is controlled and managed according to the scheduling parameters of the absorber, the operating power of the slurry circulation pump is set according to the circulating slurry volume A, and the adjustment value of the unit load is set according to the inlet flue gas pressure B. The present application can effectively reduce the number of slurry overflows, reduce the pollution caused by slurry overflows to the environment, reduce the manpower consumption caused by flushing slurry, reduce the labor intensity of the staff, and at the same time ensure the normal switching of various equipment in the absorber, ensure the stable operation of the desulfurization system, and play an important role in preventing environmental protection data from exceeding the standard.

[0087] like Figure 2As shown, in some embodiments of the present application, before determining the scheduling parameters of the absorption tower according to the working status data, it also includes:

[0088] Step S4: determining whether the circulating slurry volume A is greater than a circulating slurry volume threshold value L; if so, setting the operating power of the slurry circulation pump according to the circulating slurry volume A; if not, sending the circulating slurry volume A to the control terminal;

[0089] Step S5: determining whether the inlet flue gas pressure B is greater than the inlet flue gas pressure threshold M; if so, setting the adjustment value of the unit load according to the inlet flue gas pressure B; if not, sending the inlet flue gas pressure B to the control terminal;

[0090] Step S6: Determine whether the absorption tower liquid level C is greater than the absorption tower liquid level threshold N. If so, control the absorption tower liquid level according to the control terminal. If not, send the absorption tower liquid level C to the control terminal.

[0091] It should be noted that the circulating slurry volume threshold L in this application is 34520m 3 / h, the inlet flue gas pressure threshold M is 1472Pa, and the absorption tower liquid level is 9.01 meters.

[0092] In some embodiments of the present application, when the control terminal receives the circulating slurry volume A, the inlet flue gas pressure B and the absorption tower liquid level C, the oxidation fan is controlled to switch.

[0093] In this embodiment, when the control terminal receives the circulating slurry volume A, the inlet flue gas pressure B and the absorption tower liquid level C, it means that the circulating slurry volume A, the inlet flue gas pressure B and the absorption tower liquid level C meet the conditions. Only then can the oxidation fan be controlled to switch. By controlling the switching time of the oxidation fan, overflow of the absorption tower can be prevented, and the pollution to the environment caused by slurry overflow can be reduced.

[0094] In some embodiments of the present application, when the operating power of the slurry circulation pump is set according to the circulating slurry amount A, it includes:

[0095] The operating power of the slurry circulation pump is set according to the circulating slurry volume difference between the circulating slurry volume A and the circulating slurry volume threshold L:

[0096] A preset circulation slurry volume difference matrix E is set as E(E1, E2, E3, E4), wherein E1 is a first preset circulation slurry volume difference, E2 is a second preset circulation slurry volume difference, E3 is a third preset circulation slurry volume difference, E4 is a fourth preset circulation slurry volume difference, and E1<E2<E3<E4;

[0097] The operating power matrix F of the preset slurry circulation pump is set to F(F1, F2, F3, F4, F5), wherein F1 is the operating power of the first preset slurry circulation pump, F2 is the operating power of the second preset slurry circulation pump, F3 is the operating power of the third preset slurry circulation pump, F4 is the operating power of the fourth preset slurry circulation pump, and F5 is the operating power of the fifth preset slurry circulation pump, and F1<F2<F3<F4<F5;

[0098] The operating power of the slurry circulation pump is set according to the relationship between the circulating slurry volume difference between the circulating slurry volume A and the circulating slurry volume threshold L and each preset circulating slurry volume difference:

[0099] When |AL|<E1, the operating power F1 of the first preset slurry circulation pump is selected as the operating power of the slurry circulation pump;

[0100] When E1≤|AL|<E2, the operating power F2 of the second preset slurry circulation pump is selected as the operating power of the slurry circulation pump;

[0101] When E2≤|AL|<E3, the operating power F3 of the third preset slurry circulation pump is selected as the operating power of the slurry circulation pump;

[0102] When E3≤|AL|<E4, the operating power F4 of the fourth preset slurry circulation pump is selected as the operating power of the slurry circulation pump;

[0103] When E4≤|AL|, the operating power F5 of the fifth preset slurry circulation pump is selected as the operating power of the slurry circulation pump.

[0104] In this embodiment, the circulating slurry volume threshold L in this application is 34520m 3 / h, and the number of operating slurry circulation pumps does not exceed 3 when switching the oxidation fan operation. The present application sets the operating power of the slurry circulation pump according to the relationship between the circulating slurry volume difference between the circulating slurry volume A and the circulating slurry volume threshold L and each preset circulating slurry volume difference. The circulating slurry volume can be stably controlled below the circulating slurry volume threshold L (34520m3 / h), thereby greatly improving the reliability of the absorption tower operation.

[0105] In some embodiments of the present application, when setting the adjustment value of the unit load according to the inlet flue gas pressure B, it includes:

[0106] The adjustment value of the unit load is set according to the inlet flue gas pressure difference between the inlet flue gas pressure B and the inlet flue gas pressure threshold M:

[0107] Preset inlet smoke pressure difference matrix P, set P (P1, P2, P3, P4), where P1 is the first preset inlet smoke pressure difference, P2 is the second preset inlet smoke pressure difference, P3 is the third preset inlet smoke pressure difference, P4 is the fourth preset inlet smoke pressure difference, and P1 < P2 < P3 < P4;

[0108] The adjustment value matrix Q of the preset unit load is set to Q (Q1, Q2, Q3, Q4, Q5), wherein Q1 is the adjustment value of the first preset unit load, Q2 is the adjustment value of the second preset unit load, Q3 is the adjustment value of the third preset unit load, Q4 is the adjustment value of the fourth preset unit load, Q5 is the adjustment value of the fifth preset unit load, and Q1<Q2<Q3<Q4<Q5;

[0109] The adjustment value of the unit load is set according to the relationship between the inlet flue gas pressure difference between the inlet flue gas pressure B and the inlet flue gas pressure threshold M and each preset inlet flue gas pressure difference:

[0110] When |BM|<P1, the adjustment value Q1 of the first preset unit load is selected as the adjustment value of the unit load;

[0111] When P1≤|BM|<P2, the adjustment value Q2 of the second preset unit load is selected as the adjustment value of the unit load;

[0112] When P2≤|BM|<P3, the third preset unit load adjustment value Q3 is selected as the unit load adjustment value;

[0113] When P3≤|BM|<P4, the fourth preset unit load adjustment value Q4 is selected as the unit load adjustment value;

[0114] When P4≤|BM|, the fifth preset unit load adjustment value Q5 is selected as the unit load adjustment value.

[0115] In this embodiment, the inlet flue gas pressure threshold value M is 1472Pa. This application sets the adjustment value of the unit load according to the relationship between the inlet flue gas pressure difference between the inlet flue gas pressure B and the inlet flue gas pressure threshold value M and each preset inlet flue gas pressure difference. It should be understood that when the adjustment value of the unit load is determined, the current unit load is adjusted according to the value. For example, if the current unit load is 500MW, and the adjustment value of the unit load is 60MW at this time, then after adjustment, the unit load is 440MW. It can be understood that the above is shown by way of example and is not specifically limited. In this application, the adjusted unit load shall not be higher than 450MW, and it shall not affect the normal operation of the unit. Therefore, this application can not only ensure the stable operation of the unit, but also reduce the inlet flue gas pressure, and further prevent overflow of the absorption tower.

[0116] like Figure 3 As shown, an embodiment of the present invention discloses a system for improving the overflow of an absorption tower in a limestone-gypsum desulfurization process, the system comprising:

[0117] An acquisition module is used to acquire the working status data of the absorption tower within a preset time, wherein the working status data are the circulating slurry volume A, the inlet flue gas pressure B and the absorption tower liquid level C;

[0118] A determination module, used to determine the scheduling parameters of the absorption tower according to the working status data;

[0119] A control module, used for controlling and managing the absorption tower according to the scheduling parameters of the absorption tower;

[0120] In the determination module, the operating power of the slurry circulation pump is set according to the circulating slurry volume A, and the adjustment value of the unit load is set according to the inlet flue gas pressure B.

[0121] In some embodiments of the present application, before the determination module determines the scheduling parameters of the absorption tower according to the working status data, it also includes:

[0122] The determination module determines whether the circulating slurry volume A is greater than the circulating slurry volume threshold L. If so, the operating power of the slurry circulation pump is set according to the circulating slurry volume A. If not, the circulating slurry volume A is sent to the control terminal;

[0123] The determination module determines whether the inlet flue gas pressure B is greater than the inlet flue gas pressure threshold M. If so, the adjustment value of the unit load is set according to the inlet flue gas pressure B. If not, the inlet flue gas pressure B is sent to the control terminal;

[0124] The determination module determines whether the absorption tower liquid level C is greater than the absorption tower liquid level threshold N. If so, the absorption tower liquid level is controlled according to the control terminal. If not, the absorption tower liquid level C is sent to the control terminal.

[0125] In some embodiments of the present application, in the control module, when the control terminal receives the circulating slurry volume A, the inlet flue gas pressure B and the absorption tower liquid level C, the oxidation fan is controlled to switch.

[0126] In some embodiments of the present application, when the determination module sets the operating power of the slurry circulation pump according to the circulating slurry amount A, it includes:

[0127] The determination module is used to set the operating power of the slurry circulation pump according to the circulating slurry volume difference between the circulating slurry volume A and the circulating slurry volume threshold L:

[0128] The determination module is used to preset a circulating slurry volume difference matrix E, and set E(E1, E2, E3, E4), wherein E1 is a first preset circulating slurry volume difference, E2 is a second preset circulating slurry volume difference, E3 is a third preset circulating slurry volume difference, and E4 is a fourth preset circulating slurry volume difference, and E1<E2<E3<E4;

[0129] The determination module is used to preset the operating power matrix F of the slurry circulation pump, and set F(F1, F2, F3, F4, F5), wherein F1 is the operating power of the first preset slurry circulation pump, F2 is the operating power of the second preset slurry circulation pump, F3 is the operating power of the third preset slurry circulation pump, F4 is the operating power of the fourth preset slurry circulation pump, and F5 is the operating power of the fifth preset slurry circulation pump, and F1<F2<F3<F4<F5;

[0130] The determination module is further used to set the operating power of the slurry circulation pump according to the relationship between the circulating slurry volume difference between the circulating slurry volume A and the circulating slurry volume threshold L and each preset circulating slurry volume difference:

[0131] When |AL|<E1, the operating power F1 of the first preset slurry circulation pump is selected as the operating power of the slurry circulation pump;

[0132] When E1≤|AL|<E2, the operating power F2 of the second preset slurry circulation pump is selected as the operating power of the slurry circulation pump;

[0133] When E2≤|AL|<E3, the operating power F3 of the third preset slurry circulation pump is selected as the operating power of the slurry circulation pump;

[0134] When E3≤|AL|<E4, the operating power F4 of the fourth preset slurry circulation pump is selected as the operating power of the slurry circulation pump;

[0135] When E4≤|AL|, the operating power F5 of the fifth preset slurry circulation pump is selected as the operating power of the slurry circulation pump.

[0136] In some embodiments of the present application, when the determination module sets the adjustment value of the unit load according to the inlet flue gas pressure B, it includes:

[0137] The determination module is used to set the adjustment value of the unit load according to the inlet flue gas pressure difference between the inlet flue gas pressure B and the inlet flue gas pressure threshold M:

[0138] The determination module is used to preset the inlet smoke pressure difference matrix P, set P (P1, P2, P3, P4), wherein P1 is the first preset inlet smoke pressure difference, P2 is the second preset inlet smoke pressure difference, P3 is the third preset inlet smoke pressure difference, P4 is the fourth preset inlet smoke pressure difference, and P1<P2<P3<P4;

[0139] The determination module is used to preset the adjustment value matrix Q of the unit load, and set Q (Q1, Q2, Q3, Q4, Q5), wherein Q1 is the adjustment value of the first preset unit load, Q2 is the adjustment value of the second preset unit load, Q3 is the adjustment value of the third preset unit load, Q4 is the adjustment value of the fourth preset unit load, Q5 is the adjustment value of the fifth preset unit load, and Q1<Q2<Q3<Q4<Q5;

[0140] The determination module is further used to set the adjustment value of the unit load according to the relationship between the inlet flue gas pressure difference between the inlet flue gas pressure B and the inlet flue gas pressure threshold M and each preset inlet flue gas pressure difference:

[0141] When |BM|<P1, the adjustment value Q1 of the first preset unit load is selected as the adjustment value of the unit load;

[0142] When P1≤|BM|<P2, the adjustment value Q2 of the second preset unit load is selected as the adjustment value of the unit load;

[0143] When P2≤|BM|<P3, the third preset unit load adjustment value Q3 is selected as the unit load adjustment value;

[0144] When P3≤|BM|<P4, the fourth preset unit load adjustment value Q4 is selected as the unit load adjustment value;

[0145] When P4≤|BM|, the fifth preset unit load adjustment value Q5 is selected as the unit load adjustment value.

[0146] In summary, the embodiment of the present invention obtains the working status data of the absorber within a preset time, the working status data being the circulating slurry volume A, the inlet flue gas pressure B and the absorber liquid level C, determines the scheduling parameters of the absorber according to the working status data, controls and manages the absorber according to the scheduling parameters of the absorber, sets the operating power of the slurry circulation pump according to the circulating slurry volume A, and sets the adjustment value of the unit load according to the inlet flue gas pressure B. The present application can effectively reduce the number of slurry overflows, reduce the pollution to the environment caused by slurry overflows, reduce the manpower consumption caused by flushing slurry, reduce the labor intensity of the staff, and at the same time ensure the normal switching of each device in the absorber, ensure the stable operation of the desulfurization system, and play an important role in preventing environmental protection data from exceeding the standard.

[0147] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0148] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed by the present invention may be used in combination with each other in any manner, and the fact that these combinations are not fully described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0149] Those skilled in the art can understand that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for improving the overflow of an absorber in a limestone-gypsum desulfurization process, characterized in that: The method comprises: Step S1: obtaining the working status data of the absorption tower within a preset time, wherein the working status data are the circulating slurry volume A, the inlet flue gas pressure B and the absorption tower liquid level C; Step S2: determining the scheduling parameters of the absorption tower according to the working status data; Step S3: controlling and managing the absorption tower according to the scheduling parameters of the absorption tower; In the step S2, the operating power of the slurry circulation pump is set according to the circulating slurry amount A, and the adjustment value of the unit load is set according to the inlet flue gas pressure B; Determining the scheduling parameters of the absorption tower according to the working status data includes: Determine whether the circulating slurry volume A is greater than the circulating slurry volume threshold L, if so, set the operating power of the slurry circulation pump according to the circulating slurry volume A, if not, send the circulating slurry volume A to the control terminal; Determine whether the inlet flue gas pressure B is greater than the inlet flue gas pressure threshold M. If so, set the adjustment value of the unit load according to the inlet flue gas pressure B. If not, send the inlet flue gas pressure B to the control terminal; Determine whether the absorption tower liquid level C is greater than the absorption tower liquid level threshold N, if so, control the absorption tower liquid level according to the control terminal, if not, send the absorption tower liquid level C to the control terminal; When the control terminal receives the circulating slurry volume A, the inlet flue gas pressure B and the absorption tower liquid level C, the oxidation fan is controlled to switch.

2. The method for improving the overflow of the absorption tower in the limestone-gypsum desulfurization process according to claim 1, characterized in that: When the operating power of the slurry circulation pump is set according to the circulating slurry amount A, it includes: The operating power of the slurry circulation pump is set according to the circulating slurry volume difference between the circulating slurry volume A and the circulating slurry volume threshold L: A preset circulating slurry volume difference matrix E is set to E (E1, E2, E3, E4), wherein E1 is a first preset circulating slurry volume difference, E2 is a second preset circulating slurry volume difference, E3 is a third preset circulating slurry volume difference, E4 is a fourth preset circulating slurry volume difference, and E1 < E2 < E3 < E4; The operating power matrix F of the preset slurry circulation pump is set to F (F1, F2, F3, F4, F5), wherein F1 is the operating power of the first preset slurry circulation pump, F2 is the operating power of the second preset slurry circulation pump, F3 is the operating power of the third preset slurry circulation pump, F4 is the operating power of the fourth preset slurry circulation pump, and F5 is the operating power of the fifth preset slurry circulation pump, and F1<F2<F3<F4<F5; The operating power of the slurry circulation pump is set according to the relationship between the circulating slurry volume difference between the circulating slurry volume A and the circulating slurry volume threshold L and each preset circulating slurry volume difference: When |AL|<E1, the operating power F1 of the first preset slurry circulation pump is selected as the operating power of the slurry circulation pump; When E1≤|AL|<E2, the operating power F2 of the second preset slurry circulation pump is selected as the operating power of the slurry circulation pump; When E2≤|AL|<E3, the operating power F3 of the third preset slurry circulation pump is selected as the operating power of the slurry circulation pump; When E3≤|AL|<E4, the operating power F4 of the fourth preset slurry circulation pump is selected as the operating power of the slurry circulation pump; When E4≤|AL|, the operating power F5 of the fifth preset slurry circulation pump is selected as the operating power of the slurry circulation pump.

3. The method for improving the overflow of the absorption tower in the limestone-gypsum desulfurization process according to claim 1, characterized in that: When setting the adjustment value of the unit load according to the inlet flue gas pressure B, it includes: The adjustment value of the unit load is set according to the inlet flue gas pressure difference between the inlet flue gas pressure B and the inlet flue gas pressure threshold M: A preset inlet smoke pressure difference matrix P is set to P (P1, P2, P3, P4), wherein P1 is a first preset inlet smoke pressure difference, P2 is a second preset inlet smoke pressure difference, P3 is a third preset inlet smoke pressure difference, P4 is a fourth preset inlet smoke pressure difference, and P1<P2<P3<P4; The adjustment value matrix Q of the preset unit load is set to Q (Q1, Q2, Q3, Q4, Q5), wherein Q1 is the adjustment value of the first preset unit load, Q2 is the adjustment value of the second preset unit load, Q3 is the adjustment value of the third preset unit load, Q4 is the adjustment value of the fourth preset unit load, Q5 is the adjustment value of the fifth preset unit load, and Q1<Q2<Q3<Q4<Q5; The adjustment value of the unit load is set according to the relationship between the inlet flue gas pressure difference between the inlet flue gas pressure B and the inlet flue gas pressure threshold M and each preset inlet flue gas pressure difference: When |BM|<P1, the adjustment value Q1 of the first preset unit load is selected as the adjustment value of the unit load; When P1≤|BM|<P2, the adjustment value Q2 of the second preset unit load is selected as the adjustment value of the unit load; When P2≤|BM|<P3, the third preset unit load adjustment value Q3 is selected as the unit load adjustment value; When P3≤|BM|<P4, the fourth preset unit load adjustment value Q4 is selected as the unit load adjustment value; When P4≤|BM|, the fifth preset unit load adjustment value Q5 is selected as the unit load adjustment value.

4. A system for improving the overflow of an absorber in a limestone-gypsum desulfurization process, characterized in that: The system comprises: An acquisition module is used to acquire the working status data of the absorption tower within a preset time, wherein the working status data are the circulating slurry volume A, the inlet flue gas pressure B and the absorption tower liquid level C; A determination module, used to determine the scheduling parameters of the absorption tower according to the working status data; A control module, used for controlling and managing the absorption tower according to the scheduling parameters of the absorption tower; In the determination module, the operating power of the slurry circulation pump is set according to the circulating slurry amount A, and the adjustment value of the unit load is set according to the inlet flue gas pressure B; The determining module determines the scheduling parameters of the absorption tower according to the working status data, including: The determination module determines whether the circulating slurry volume A is greater than the circulating slurry volume threshold L. If so, the operating power of the slurry circulation pump is set according to the circulating slurry volume A. If not, the circulating slurry volume A is sent to the control terminal; The determination module determines whether the inlet flue gas pressure B is greater than the inlet flue gas pressure threshold M. If so, the adjustment value of the unit load is set according to the inlet flue gas pressure B. If not, the inlet flue gas pressure B is sent to the control terminal; The determination module determines whether the absorption tower liquid level C is greater than the absorption tower liquid level threshold N. If so, the absorption tower liquid level is controlled according to the control terminal. If not, the absorption tower liquid level C is sent to the control terminal. In the control module, when the control terminal receives the circulating slurry volume A, the inlet flue gas pressure B and the absorption tower liquid level C, the oxidation fan is controlled to switch.

5. The system for improving the overflow of the absorption tower in the limestone-gypsum desulfurization process according to claim 4, characterized in that: When the determination module sets the operating power of the slurry circulation pump according to the circulating slurry amount A, it includes: The determination module is used to set the operating power of the slurry circulation pump according to the circulating slurry volume difference between the circulating slurry volume A and the circulating slurry volume threshold L: The determination module is used to preset a circulating slurry volume difference matrix E, and set E (E1, E2, E3, E4), wherein E1 is a first preset circulating slurry volume difference, E2 is a second preset circulating slurry volume difference, E3 is a third preset circulating slurry volume difference, E4 is a fourth preset circulating slurry volume difference, and E1<E2<E3<E4; The determination module is used to preset the operating power matrix F of the slurry circulation pump, and set F (F1, F2, F3, F4, F5), wherein F1 is the operating power of the first preset slurry circulation pump, F2 is the operating power of the second preset slurry circulation pump, F3 is the operating power of the third preset slurry circulation pump, F4 is the operating power of the fourth preset slurry circulation pump, and F5 is the operating power of the fifth preset slurry circulation pump, and F1<F2<F3<F4<F5; The determination module is further used to set the operating power of the slurry circulation pump according to the relationship between the circulating slurry volume difference between the circulating slurry volume A and the circulating slurry volume threshold L and each preset circulating slurry volume difference: When |AL|<E1, the operating power F1 of the first preset slurry circulation pump is selected as the operating power of the slurry circulation pump; When E1≤|AL|<E2, the operating power F2 of the second preset slurry circulation pump is selected as the operating power of the slurry circulation pump; When E2≤|AL|<E3, the operating power F3 of the third preset slurry circulation pump is selected as the operating power of the slurry circulation pump; When E3≤|AL|<E4, the operating power F4 of the fourth preset slurry circulation pump is selected as the operating power of the slurry circulation pump; When E4≤|AL|, the operating power F5 of the fifth preset slurry circulation pump is selected as the operating power of the slurry circulation pump.

6. The system for improving the overflow of the absorption tower in the limestone-gypsum desulfurization process according to claim 4, characterized in that: When the determination module sets the adjustment value of the unit load according to the inlet flue gas pressure B, it includes: The determination module is used to set the adjustment value of the unit load according to the inlet flue gas pressure difference between the inlet flue gas pressure B and the inlet flue gas pressure threshold M: The determination module is used to preset the inlet smoke pressure difference matrix P, set P (P1, P2, P3, P4), where P1 is the first preset inlet smoke pressure difference, P2 is the second preset inlet smoke pressure difference, P3 is the third preset inlet smoke pressure difference, P4 is the fourth preset inlet smoke pressure difference, and P1<P2<P3<P4; The determination module is used to preset the adjustment value matrix Q of the unit load, and set Q (Q1, Q2, Q3, Q4, Q5), wherein Q1 is the adjustment value of the first preset unit load, Q2 is the adjustment value of the second preset unit load, Q3 is the adjustment value of the third preset unit load, Q4 is the adjustment value of the fourth preset unit load, Q5 is the adjustment value of the fifth preset unit load, and Q1<Q2<Q3<Q4<Q5; The determination module is further used to set the adjustment value of the unit load according to the relationship between the inlet flue gas pressure difference between the inlet flue gas pressure B and the inlet flue gas pressure threshold M and each preset inlet flue gas pressure difference: When |BM|<P1, the adjustment value Q1 of the first preset unit load is selected as the adjustment value of the unit load; When P1≤|BM|<P2, the adjustment value Q2 of the second preset unit load is selected as the adjustment value of the unit load; When P2≤|BM|<P3, the third preset unit load adjustment value Q3 is selected as the unit load adjustment value; When P3≤|BM|<P4, the fourth preset unit load adjustment value Q4 is selected as the unit load adjustment value; When P4≤|BM|, the fifth preset unit load adjustment value Q5 is selected as the unit load adjustment value.

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