Partitioned accurate adjusting system for wet desulphurization circulating slurry

Abstract

The utility model discloses a wet desulphurization circulating slurry zoning accurate adjusting system which comprises a flue gas conveying system, the output end of the flue gas conveying system is in signal connection with a flue gas inlet detection system, and the output end of the flue gas inlet detection system is in signal connection with a variable frequency pump set system. The output end of the variable frequency pump set system is in signal connection with a slurry supply system, the output end of the slurry supply system is in signal connection with a precise spraying system, and the control center is in signal connection with the output end of the precise spraying system. Desulfurization work is carried out through a flue gas conveying system, an inlet flue gas detection system, a variable frequency pump set system, a slurry supply system and an accurate spraying system, spraying can be adjusted through an adjusting center in order to make slurry be reasonably used, flue gas is detected when a monitoring module starts to work, and when the flue gas is normal, the flue gas is discharged through the adjusting center. If so, the flue gas normally transmits a signal to the input end of the monitoring module so as to continuously monitor the flue gas.

Description

Technical Field

[0001] The utility model relates to the technical field of wet desulfurization, in particular to a wet desulfurization circulating slurry partition precision adjustment system. Background Art

[0002] Wet desulfurization is a gas-liquid reaction between desulfurizer slurry and sulfur dioxide in flue gas. At present, wet desulfurization technology is relatively mature, with high reaction efficiency and safe and reliable production operation. It has always occupied a dominant position among many desulfurization technologies, accounting for more than 90% of the total installed capacity of desulfurization. The core equipment of wet desulfurization is the desulfurization tower. The desulfurization tower is equipped with a slurry circulation pump. There is a spray layer in the desulfurization tower. The circulation pump circulates the desulfurization slurry in the desulfurization tower to the spray layer for atomization, and reacts with sulfur dioxide in the flue gas.

[0003] At present, most desulfurization equipment is equipped with multiple circulation pumps corresponding to multiple spray layers; the number of spray layers, the number of circulation pumps and the flow rate are the main means to control the desulfurization efficiency. When the required desulfurization efficiency is high, more circulation pumps and spray layers are required. Most desulfurization equipment is equipped with 3-5 layers of circulation pumps and corresponding spray layers. When the boiler fuel, boiler combustion conditions and flue gas load change, the sulfur dioxide concentration in the flue gas will change. At this time, the required desulfurization efficiency to achieve ultra-low emissions will also change accordingly. For example, the sulfur dioxide concentration in the flue gas is 4000mg / Nm 3 When the sulfur dioxide concentration in the flue gas reaches 3000mg / Nm 3 When the emission standard is reached, it may be necessary to run only 3-4 circulating pumps. Since the nozzles on the spray layer require a certain flow rate to achieve a good atomization effect, the flow rate of the spray layer is generally fixed. Because the flow rate of a single circulating pump and the spray layer is fixed and cannot be adjusted, sometimes running 3 circulating pumps cannot meet the standard, and running 4 circulating pumps will result in energy waste.

[0004] In response to this energy waste, we propose a system for precise regulation of the wet flue gas desulfurization circulating slurry partitions. While adjusting a single circulating pump, it can ensure good atomization and covering effects of a single spray layer, thereby achieving more precise regulation of the desulfurization efficiency of the desulfurization system and achieving energy conservation and consumption reduction. Utility Model Content

[0005] The purpose of the utility model is to provide a wet flue gas desulfurization circulating slurry partition precise regulation system to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a wet flue gas desulfurization circulating slurry partition precision adjustment system, including a flue gas conveying system, the output end signal of the flue gas conveying system is connected to a smoke inlet detection system, the output end signal of the smoke inlet detection system is connected to a variable frequency pump group system, the output end signal of the variable frequency pump group system is connected to a slurry supply system, the output end signal of the slurry supply system is connected to a precision spraying system, and a control center connected to the output end signal of the precision spraying system, the output end signal of the control center is connected to a regulation center, and the output end signal of the regulation center is connected to a spraying center.

[0007] Preferably, the output end signal of the regulating center is connected to a monitoring module, the output end signal of the monitoring module away from the normal smoke side is connected to the smoke abnormality, the output end signal of the smoke abnormality is connected to a sensing module, the output end signal of the sensing module is connected to the rising smoke, the output end signal of the rising smoke is connected to a barrier module, the output end signal of the barrier module is connected to an increase in spraying module, the output end signal of the sensing module away from the rising smoke side is connected to the falling smoke, and the output end signal of the falling smoke is connected to a reduction in spraying module.

[0008] Preferably, the spray center includes a spray increasing component connected to the output end signal of the spray increasing module, the output end signal of the spray increasing component is connected to the A / B spray module, the input end signal of the A / B spray module is connected to the spray reducing component, and the output end signal of the spray center is connected to the constant spray module.

[0009] Preferably, the sensing module has two output terminals, which are respectively connected to the smoke rising and smoke falling input terminal signals. Under the limitation of the sensing module, the smoke spraying condition can be detected.

[0010] Preferably, the normal flue gas output terminal is signal-connected to the monitoring module input terminal. The monitoring module has two output terminals, which are respectively connected to the normal flue gas and abnormal flue gas input terminal signals. Under the monitoring of the monitoring module, the flue gas treatment effect can be monitored to improve the spraying effect.

[0011] Preferably, the A / B spray module has two input ends, which are respectively connected to the output signals of the spray reduction component and the spray increase component. Under the precise adjustment of the A / B spray module, the slurry can be saved.

[0012] Preferably, the spray center has three output ends, which are respectively connected to the input end signals of the spray increase module, the spray reduction module and the constant spray module. Under the limitation of the spray center, the spraying can be accurately adjusted.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The wet flue gas desulfurization circulating slurry partition precision regulation system is composed of a regulation center as one of its components. When desulfurization work is required, the flue gas delivery system, smoke inlet detection system, frequency conversion pump system, slurry supply system and precision spraying system are used to carry out desulfurization work. In order to make reasonable use of the slurry, the spraying can be adjusted through the regulation center. When the monitoring module starts working, it detects the flue gas. When the flue gas is normal, the flue gas transmits a signal to the input end of the monitoring module to continuously monitor the flue gas. When the flue gas is abnormal, the flue gas transmits a signal to the sensing module. When the sensing module detects that the flue gas is rising, the second spray above the spray mechanism is detected through the interlayer module. The spray mechanism is started to trigger the spray increase module to spray the flue gas floating upward. This structure can spray the flue gas escaping the spray area. When the flue gas drops, the flue gas position is located by the sensing module. When the flue gas does not reach the spray area, the spray reduction module starts to work. The spray reduction module will close the spray mechanism that has not passed the flue gas to save slurry, and can make the spray mechanism operation accurately adaptively adjust the desulfurization efficiency. While ensuring the coverage rate and atomization effect of the spray mechanism, it not only ensures the desulfurization efficiency, but also reduces the energy consumption of the slurry. The output of the circulating pump is adjusted according to the required desulfurization efficiency, which achieves the purpose of energy saving and consumption reduction, reduces operating costs, and maximizes benefits.

[0015] 2. The wet flue gas desulfurization circulating slurry partition precision adjustment system is composed of a spray center. When the flue gas needs to be sprayed accurately, it can be adjusted through the spray increase component and the spray reduction component. Each spray mechanism is divided into two layers. When the flue gas passes through the spray mechanism, the spray increase module is started at this time to make the spray increase component work. The spray increase component starts the second layer above the spraying mechanism to isolate the floating flue gas. When the flue gas does not reach the spraying mechanism, the spray reduction component starts to work to reduce the spraying of the spray mechanism to adjust the slurry. Liquid saving, when the flue gas is in contact with the slurry in the spraying mechanism, the constant spray module will work, and the new spraying mechanism will no longer be closed or opened. The circulating pump adopts frequency conversion control. When the first A layer spray layer is opened, the desulfurization efficiency does not meet the standard. When the second A layer spray layer is opened, the standard can be met but it will cause waste. The B layer can be adjusted to meet the standard. Each layer is precisely divided into two partitions, AB. When each partition is operated separately, it can still fully cover the entire desulfurization tower cross-section, ensuring the spray coverage rate to prevent the flue gas from escaping without desulfurization reaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is the main structural block diagram of the utility model.

[0017] Figure 2 It is a block diagram of the structural adjustment center and the spray center of the utility model.

[0018] Figure 3 This is a central block diagram of the structure adjustment of the utility model.

[0019] Figure 4 This is a structural spray center block diagram of the utility model.

[0020] Figure 5 This is the flow chart of wet desulfurization of the utility model structure.

[0021] Figure 6 It is a partially enlarged schematic diagram of the wet desulfurization process of the utility model structure.

[0022] In the figure: 1. Smoke conveying system; 2. Smoke inlet detection system; 3. Variable frequency pump system; 4. Slurry supply system; 5. Precision spraying system; 6. Control center; 61. Adjustment center; 62. Spraying center; 611. Monitoring module; 612. Normal smoke; 613. Abnormal smoke; 614. Sensing module; 615. Smoke rising; 616. Interlayer module; 617. Spray increasing module; 618. Smoke falling; 619. Spray reducing module; 621. Spray increasing component; 622. Spray reducing component; 623. A / B spraying module; 624. Constant spraying module. DETAILED DESCRIPTION

[0023] In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation methods of the utility model are now described with reference to the accompanying drawings.

[0024] Example 1

[0025] The preferred embodiment of the wet desulfurization circulating slurry partition precise adjustment system provided by the utility model is as follows Figures 1 to 6 As shown: a wet flue gas desulfurization circulating slurry partition precise regulation system, including a flue gas conveying system 1;

[0026] The output signal of the smoke delivery system 1 is connected to the smoke inlet detection system 2;

[0027] The output signal of the smoke inlet detection system 2 is connected to the variable frequency pump system 3;

[0028] The output end signal of the variable frequency pump system 3 is connected to the slurry supply system 4;

[0029] The output signal of the slurry supply system 4 is connected to the precision spray system 5;

[0030] And a control center 6 connected to the output end signal of the precision spray system 5, the output end signal of the control center 6 is connected to the adjustment center 61, the output end signal of the adjustment center 61 is connected to the monitoring module 611, the output end signal of the monitoring module 611 away from the normal smoke 612 is connected to the abnormal smoke 613, the output end signal of the abnormal smoke 613 is connected to the sensing module 614, the output end signal of the sensing module 614 is connected to the rising smoke 615, the output end signal of the rising smoke 615 is connected to the interlayer module 616, the output end signal of the interlayer module 616 is connected to the spray increasing module 617, the output end signal of the sensing module 614 away from the rising smoke 615 is connected to the falling smoke 618, and the output end signal of the falling smoke 618 is connected to the spray reducing module 619.

[0031] In this embodiment, when desulfurization work is required, the desulfurization work is carried out through the flue gas delivery system 1, the smoke inlet detection system 2, the variable frequency pump system 3, the slurry supply system 4, and the precision spraying system 5. In order to make reasonable use of the slurry, the spraying can be adjusted through the adjustment center 61. When the monitoring module 611 starts working, it detects the flue gas. When the flue gas is normal 612, the flue gas normal 612 transmits a signal to the input end of the monitoring module 611 to continuously monitor the flue gas. When the flue gas is abnormal 613, the flue gas abnormal 613 transmits a signal to the sensing module 614. When the sensing module 614 detects that the flue gas rises 615, the second spraying machine above the spraying mechanism is detected through the interlayer module 616. The structure is started to trigger the spray increase module 617 to spray the flue gas floating upward. The structure can spray the flue gas escaping the spray area. When the flue gas drops 618, the flue gas position is located by the sensing module 614. When the flue gas does not reach the spray area, the spray reduction module 619 starts to work. The spray reduction module 619 closes the spray mechanism that has not passed the flue gas to save slurry, and can make the spray mechanism operation accurately adaptively adjust the desulfurization efficiency. While ensuring the coverage rate and atomization effect of the spray mechanism, it not only ensures the desulfurization efficiency, but also reduces the energy consumption of the slurry. The output of the circulating pump is adjusted according to the required desulfurization efficiency, which achieves the purpose of energy saving and consumption reduction, reduces operating costs, and maximizes benefits.

[0032] Furthermore, the sensing module 614 has two output terminals, which are respectively connected to the signals of the smoke rising 615 and smoke falling 618 input terminals. Under the limitation of the sensing module 614, the smoke spraying condition can be detected.

[0033] Furthermore, the normal smoke 612 output terminal is connected to the input terminal signal of the monitoring module 611. The monitoring module 611 has two output terminals, which are respectively connected to the normal smoke 612 and abnormal smoke 613 input terminal signals. Under the monitoring of the monitoring module 611, the smoke treatment effect can be monitored to improve the spraying effect.

[0034] Example 2

[0035] On the basis of Example 1, a preferred embodiment of a wet desulfurization circulating slurry partition precise adjustment system provided by the utility model is as follows: Figures 1 to 6 As shown: the spray center 62 includes a spray increase component 621 connected to the output end signal of the spray increase module 617, the output end signal of the spray increase component 621 is connected to the A / B spray module 623, the input end signal of the A / B spray module 623 is connected to the spray reduction component 622, and the output end signal of the spray center 62 is connected to the constant spray module 624.

[0036] In this embodiment, when it is necessary to spray the flue gas accurately, it can be adjusted by the spray increase component 621 and the spray reduction component 622. Each spray mechanism is divided into two layers. When the flue gas passes through the spray mechanism, the spray increase module 617 is started at this time to make the spray increase component 621 work. The spray increase component 621 starts the second layer above the spraying mechanism to isolate the floating flue gas. When the flue gas does not reach the spraying mechanism, the spray reduction component 622 starts to work to reduce the spraying of the spray mechanism to save slurry. When the gas contacts the slurry in the spraying mechanism, the constant spraying module 624 works and no longer closes or opens new spraying mechanisms. The circulating pump adopts frequency conversion control. When the first A-layer spraying layer is opened, the desulfurization efficiency does not meet the standard. When the second A-layer spraying layer is opened, the standard is met but it will cause waste. The B-layer can be adjusted to meet the standard. Each layer is precisely zoned and adjusted to be divided into two zones, AB. When each zone is operated separately, it can still fully cover the entire cross-section of the desulfurization tower, ensuring the spray coverage rate to prevent the flue gas from escaping without undergoing the desulfurization reaction.

[0037] Furthermore, the A / B spray module 623 has two input terminals, which are respectively connected to the output terminal signals of the spray reduction component 622 and the spray increase component 621. Under the precise adjustment of the A / B spray module 623, the slurry can be saved.

[0038] In addition, the spray center 62 has three output terminals, which are respectively connected to the input terminal signals of the spray increase module 617, the spray reduction module 619 and the constant spray module 624. Under the limitation of the spray center 62, the spraying can be accurately adjusted.

[0039] The above is only an illustrative specific implementation method of the utility model, and is not intended to limit the scope of the utility model. Any equivalent changes and modifications made by any technician in this field without departing from the concept and principle of the utility model should fall within the scope of protection of the utility model. It should also be noted that the various components of the utility model are not limited to the above-mentioned overall application. The various technical features described in the specification of the utility model can be selected one by one or multiple ones can be selected and used in combination according to actual needs. Therefore, the utility model should naturally cover other combinations and specific applications related to the utility model points of this case.

Claims

1. A wet flue gas desulfurization circulating slurry partition precision regulation system, comprising a flue gas conveying system (1); The output end signal of the smoke delivery system (1) is connected to a smoke inlet detection system (2); The output end signal of the smoke inlet detection system (2) is connected to a variable frequency pump system (3); The output end signal of the variable frequency pump system (3) is connected to the slurry supply system (4); The output end signal of the slurry supply system (4) is connected to a precision spraying system (5); and a control center (6) connected to the output signal of the precision spraying system (5), characterized in that: The output end signal of the control center (6) is connected to the regulating center (61), and the output end signal of the regulating center (61) is connected to the spraying center (62).

2. According to claim 1, a wet flue gas desulfurization circulating slurry partition precise adjustment system is characterized by: The output end signal of the regulating center (61) is connected to a monitoring module (611), the output end signal of the monitoring module (611) away from the normal smoke (612) is connected to the abnormal smoke (613), the output end signal of the abnormal smoke (613) is connected to a sensing module (614), the output end signal of the sensing module (614) is connected to a rising smoke (615), the output end signal of the rising smoke (615) is connected to a barrier module (616), the output end signal of the barrier module (616) is connected to a spray increase module (617), the output end signal of the sensing module (614) away from the rising smoke (615) is connected to a falling smoke (618), and the output end signal of the falling smoke (618) is connected to a spray reduction module (619).

3. According to claim 1, a wet flue gas desulfurization circulating slurry partition precise adjustment system is characterized by: The spray center (62) includes a spray increasing component (621) connected to the output end signal of the spray increasing module (617), the output end signal of the spray increasing component (621) is connected to the A / B spray module (623), the input end signal of the A / B spray module (623) is connected to the spray reducing component (622), and the output end signal of the spray center (62) is connected to the constant spray module (624).

4. A wet desulfurization circulating slurry partition precise adjustment system according to claim 2, characterized in that: The sensing module (614) has two output terminals, which are respectively connected to the signals of the smoke rising (615) and smoke falling (618) input terminals.

5. According to claim 2, a wet flue gas desulfurization circulating slurry partition precise adjustment system is characterized by: The normal smoke (612) output terminal is signal-connected to the monitoring module (611) input terminal. The monitoring module (611) has two output terminals, which are respectively signal-connected to the normal smoke (612) and abnormal smoke (613) input terminals.

6. A wet flue gas desulfurization circulating slurry partition precise regulation system according to claim 3, characterized in that: The A / B spray module (623) has two input terminals, which are respectively connected to the output terminals of the spray reduction component (622) and the spray increase component (621) for signals.

7. A wet desulfurization circulating slurry partition precise adjustment system according to claim 3, characterized in that: The spray center (62) has three output terminals, which are respectively connected to the input terminals of the spray increase module (617), the spray reduction module (619) and the constant spray module (624) via signals.

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