Device for automatically controlling foaming of absorption tower and control system

Abstract

The invention relates to the technical field of industrial waste gas treatment, in particular to a device for automatically controlling foaming of an absorption tower and a control system. The device comprises a control unit, and the control unit comprises a soaking induction assembly, a spraying assembly arranged at the upper end of the soaking induction assembly, and a defoaming assembly inserted into the top of the spraying assembly; the bubble induction assembly is used for detecting the content of bubbles in the absorption tower; the spraying assembly is used for spraying a defoaming agent into the absorption tower; the defoaming assembly is used for providing a defoaming agent for the spraying assembly. The device has the beneficial effects that through the structural design of the adjusting sensor, the dosing sensor, the anomaly detection sensor and the first defoaming agent metering pump, the foaming condition of slurry in the absorption tower during operation can be checked in real time, and the operation of the defoaming agent metering pump is started or stopped in time.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial waste gas treatment, and particularly to a device and a control system for automatically controlling the foaming of an absorption tower. Background Art

[0002] In industries such as thermal power generation, chemical engineering, and iron and steel, as an important waste gas treatment device, the absorption tower is widely used to remove pollutants such as sulfur dioxide, nitrogen oxides, and dust in flue gas. The absorption tower converts harmful gases into harmless substances through the absorption of slurry, thereby achieving environmental protection and resource recovery. However, during the actual operation process, the slurry in the absorption tower often causes an increase in the content of organic matter and heavy metal ions in the slurry due to reasons such as absorbing impurities in the flue gas, excessive impurities in limestone, too high chloride ion concentration in makeup water, and untimely wastewater treatment, and then a large amount of foam is generated. The generation of foam not only affects the normal operation of the absorption tower, resulting in the deterioration of the slurry quality, but also corrodes the equipment, shortening the service life and maintenance cycle of the equipment.

[0003] In the prior art, the treatment is usually carried out by manually observing the overflow of foam and then adding defoamer. This method has obvious hysteresis and cannot monitor the content of foam inside the absorption tower in real time, resulting in inaccurate "start" and "stop" time points for adding defoamer. When the amount of foam gradually increases to block the ventilation holes of the overflow pipe of the absorption tower, the foam will overflow, and it is too late to add defoamer at this time, which may cause problems such as equipment failure and environmental pollution. In addition, due to the inability to accurately judge the actual content of foam inside the absorption tower, in order to avoid secondary foam overflow, operators often add defoamer in excess, resulting in economic waste. These short - comings of the prior art affect the operation efficiency and equipment life of the absorption tower. Summary of the Invention

[0004] In view of the problems existing in the prior art, the present invention is proposed.

[0005] Therefore, the object of the present invention is to provide a device for automatically controlling the foaming of an absorption tower, which solves the technical problems of hysteresis and inaccuracy existing in the prior defoaming technology of absorption towers. By monitoring the amount of foam in real time and automatically and accurately adding defoamer, the safety and stability of equipment operation are improved, the operation cost is reduced, and the impact on the environment is reduced at the same time.

[0006] To solve the above - mentioned technical problems, the present invention provides the following technical solution: A device for automatically controlling the foaming of an absorption tower, a control unit, including a foam sensing component, a spraying component arranged at the upper end of the foam sensing component, and a defoaming component inserted and arranged at the top of the spraying component;

[0007] The foam sensing component is used to detect the foam content in the absorption tower; the spraying component is used to spray the medicament into the absorption tower; the defoaming component is used to provide the medicament for the spraying component.

[0008] As a preferred solution of the device for automatically controlling the foaming of the absorption tower according to the present invention, wherein: the foam sensing component includes a connecting block, an adjustment sensor fixedly arranged on the connecting block, a dosing sensor arranged above the adjustment sensor, and an abnormal detection sensor arranged above the dosing sensor.

[0009] As a preferred solution of the device for automatically controlling the foaming of the absorption tower according to the present invention, wherein: the spraying component includes a spraying net, a diversion block fixedly arranged on the spraying net, a diversion pipe inserted at the upper end of the diversion block, and a medicine collecting bucket inserted on the diversion pipe.

[0010] As a preferred solution of the device for automatically controlling the foaming of the absorption tower according to the present invention, wherein: the defoaming component includes an input pipe and a defoaming automatic control device inserted at one end of the input pipe.

[0011] As a preferred solution of the device for automatically controlling the foaming of the absorption tower according to the present invention, wherein: the input pipe includes a medicine outlet, and two groups of medicine inlets are arranged at one end far from the medicine outlet; the medicine outlet is inserted into the medicine collecting bucket.

[0012] As a preferred solution of the device for automatically controlling the foaming of the absorption tower according to the present invention, wherein: the defoaming automatic control device includes a first defoaming metering pump and a second defoaming metering pump arranged above the first defoaming metering pump; the two groups of medicine inlets are respectively inserted into the first defoaming metering pump and the second defoaming metering pump.

[0013] As a preferred solution of the device for automatically controlling the foaming of the absorption tower according to the present invention, wherein: the control unit further includes a stirring component, the stirring component includes a connecting seat, a rotating shaft rotatably connected to the upper end of the connecting seat, and a spiral blade welded around the rotating shaft.

[0014] As a preferred solution of the device for automatically controlling the foaming of the absorption tower according to the present invention, wherein: it further includes a housing, the housing includes an overflow pipe inserted on the housing, a fixing frame sleeved outside the housing, and an annular frame sleeved inside the housing; the upper end of the fixing frame is fixedly connected to the defoaming automatic control device; the inner ring of the annular frame sleeves the medicine collecting bucket.

[0015] The second object of the present invention is to provide a control system for automatically controlling the foaming of the absorption tower, including:

[0016] Power module. By setting the power module inside the device, it provides power and power source for the entire device.

[0017] Alarm and transmission module. By setting the alarm and transmission module inside the device, it enables signal transmission and alarm prediction among the foam induction component, the spraying component, and the defoaming component.

[0018] Control module. By setting the control module inside the device, it controls the chemical dosing amount and dosing rate of the defoaming component.

[0019] Advantages of the present invention: Through the structural design of the adjustment sensor, chemical dosing sensor, and abnormal detection sensor and the first defoaming agent metering pump, it can real-time check the foaming situation of the internal slurry during the operation of the absorption tower, and start or stop the operation of the defoaming agent metering pump in a timely manner; continuously and automatically adjust the operation frequency of the defoaming agent metering pump according to the control situation of the slurry foaming, which can avoid potential safety hazards and environmental pollution problems brought to the operation of the absorption tower due to untimely addition of the defoaming agent; or due to excessive addition of the defoaming agent, resulting in waste of the defoaming agent and economic waste; also through the two mutually cooperative working methods of the spraying component and the stirring component, the working efficiency is greatly improved. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for description in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. Among them:

[0021] Figure 1 It is a schematic diagram of the overall structure of a device for automatically controlling foaming in an absorption tower.

[0022] Figure 2 It is a partial structure cut-away view of a device for automatically controlling foaming in an absorption tower.

[0023] Figure 3 It is a partial structure cut-away view of a device for automatically controlling foaming in an absorption tower.

[0024] Figure 4 It is a schematic diagram of a partial structure of a device for automatically controlling foaming in an absorption tower.

[0025] Figure 5 It is a schematic diagram of a partial structure of a device for automatically controlling foaming in an absorption tower.

[0026] Figure 6 It is a schematic diagram of a partial structure of a device for automatically controlling foaming in an absorption tower.

[0027] Figure 7 It is a flowchart of a control system. Specific embodiments

[0028] To make the above objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings of the specification.

[0029] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0030] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure or characteristic that may be included in at least one implementation manner of the present invention. The appearances of "in one embodiment" in different places in this specification do not all refer to the same embodiment, nor are they separate or alternative embodiments that exclude each other with other embodiments.

[0031] Embodiment 1

[0032] Referring to Figures 1 to 6 , this is the first embodiment of the present invention. This embodiment provides a device for automatically controlling the foaming of an absorption tower, which can detect the foaming condition of the internal slurry in the absorption tower in real time.

[0033] Specifically, the control unit 100 includes a foam induction component 101, a spraying component 102 arranged above the foam induction component 101, and an antifoaming component 103 inserted and arranged on the top of the spraying component 102;

[0034] The foam induction component 101 is used to detect the foam content in the absorption tower; the spraying component 102 is used to spray medicine into the absorption tower; the antifoaming component 103 is used to provide medicine for the spraying component 102.

[0035] Furthermore, the foam induction component 101 includes a connection block 101a, an adjustment sensor 101b fixedly arranged on the connection block 101a, a dosing sensor 101c arranged above the adjustment sensor 101b, and an abnormal detection sensor 101d arranged above the dosing sensor 101c. The connection block is fixedly arranged on the inner wall of the housing.

[0036] It should be noted that the entire foam induction assembly 101 is arranged inside the absorption tower, and the installation position should be above the normal liquid level of the internal slurry in the absorption tower. By setting "three layers" of alarm values, namely the adjustment layer, the chemical addition layer, and the abnormal layer, corresponding to the adjustment sensor 101b, the chemical addition sensor 101c, and the abnormal detection sensor 101 in the device, the foaming condition of the internal slurry during the operation of the absorption tower can be checked in real time.

[0037] Preferably, when the foaming height of the internal slurry reaches the adjustment sensor 101b during the operation of the absorption tower, the adjustment sensor 101b emits an alarm signal to remind the staff; when the foaming height of the internal slurry reaches the chemical addition sensor 101c during the operation of the absorption tower, the chemical addition sensor 101c emits an alarm signal, and the first defoaming metering pump 103b-1 starts and delivers defoaming agent to the spraying assembly 102; when the foaming height of the internal slurry reaches the abnormal detection sensor 101 during the operation of the absorption tower, the first defoaming metering pump 103b-1 starts immediately and adds defoaming agent at the maximum frequency to quickly reduce the foam volume. If the first defoaming metering pump 103b-1 is damaged and cannot work properly, the second defoaming metering pump 103b-2 is started immediately.

[0038] Furthermore, the spraying assembly 102 includes a spraying net 102a, a drainage block 102b fixedly arranged on the spraying net 102a, a shunt pipe 102c inserted at the upper end of the drainage block 102b, and a medicine collecting bucket 102d inserted on the shunt pipe 102c. Many circular small holes are arranged on the spraying net 102a, and this structural design facilitates the defoaming agent to be evenly sprayed into the foaming slurry in the absorption tower.

[0039] It should be noted that first, when there is a foaming phenomenon in the internal slurry of the absorption tower and the foaming height has reached the chemical addition sensor 101c, the defoaming agent flows into the internal part of the medicine collecting bucket 102d, then flows into the internal part of the drainage block 102b through the shunt pipe 102c, and finally the defoaming agent is evenly distributed into the foaming slurry through the spraying net 102a.

[0040] Furthermore, the defoaming assembly 103 includes an input pipe 103a and a defoaming automatic control device 103b inserted at one end of the input pipe 103a.

[0041] Furthermore, the input pipe 103a includes a medicine outlet 103a-1, and two groups of medicine inlets 103a-2 are arranged at one end far away from the medicine outlet 103a-1; the medicine outlet 103a-1 is inserted into the medicine collecting bucket 102d.

[0042] Further, the defoaming automatic control device 103b includes a first defoaming metering pump 103b-1 and a second defoaming metering pump 103b-2 provided at the upper end of the first defoaming metering pump 103b-1; two groups of medicine inlets 103a-2 are respectively inserted into the first defoaming metering pump 103b-1 and the second defoaming metering pump 103b-2.

[0043] Preferably, the first defoaming metering pump 103b-1 is the main metering pump, and the second defoaming metering pump 103b-2 is the standby metering pump. When the first defoaming metering pump 103b-1 encounters equipment damage, insufficient defoaming agent dosage or other abnormal conditions, the second defoaming metering pump 103b-2 is started to face this emergency.

[0044] It should be noted that during the process of adding the defoaming agent by the first defoaming metering pump 103b-1, the foam sensing component continuously detects the change of the foam amount inside the absorption tower and feeds back the detection situation to the first defoaming metering pump 103b-1 in real time. The first defoaming metering pump 103b-1 adjusts the operating frequency. That is, if the foam amount inside the absorption tower is still rising, the frequency of the metering pump automatically increases; if the foam amount is stable and does not rise, the frequency of the metering pump remains unchanged; if the foam amount decreases, the frequency of the metering pump decreases. When the foam content inside the absorption tower drops below the alarm value of the "adjustment layer", the metering pump stops running.

[0045] During use, when the adjustment sensor 101a in the foam sensing component 101 detects that the foam content inside the absorption tower gradually increases to the "adjustment layer", the adjustment sensor 101a sends out an "alarm" signal. This "signal" is transmitted to the alarm system in the operator control room, and the operator should timely adjust the operating parameters of the absorption tower to adjust and control the foam content inside the absorption tower. When it is impossible to reduce the foam content inside the absorption tower by adjusting the operating parameters of the absorption tower or the signal sent by the adjustment sensor 101a fails to be observed in time, when the foam sensing device detects that the foam content inside the absorption tower gradually increases to the "medicine adding layer", the medicine adding sensor 101b sends out an alarm signal. This "signal" is transmitted to the alarm system in the operator control room, and the alarm system gives an audible and visual, text alarm prompt. At the same time, the defoaming agent automatic dosing controller issues an instruction to start the first defoaming metering pump 103b-1. The defoaming agent is transported from the input pipe to the medicine collecting bucket 102d, then flows through the shunt pipe 102c into the drainage block 102b, and finally the defoaming agent is evenly distributed in the foaming slurry through the spraying net 102a to check the foaming situation of the internal slurry during the operation of the absorption tower in real time.

[0046] Embodiment 2

[0047] Refer to Figures 1 to 3, which is the second embodiment of the present invention. The difference from the first embodiment is that the device can also greatly improve work efficiency through the structural design of the cooperation between the stirring component 104 and the spraying component 102.

[0048] Specifically, the control unit 100 includes a foam induction component 101, a spraying component 102 arranged at the upper end of the foam induction component 101, and an antifoaming component 103 inserted and arranged at the top of the spraying component 102;

[0049] The foam induction component 101 is used to detect the foam content in the absorption tower; the spraying component 102 is used to spray the medicament into the absorption tower; the antifoaming component 103 is used to provide the medicament for the spraying component 102.

[0050] Furthermore, the control unit 100 further includes a stirring component 104. The stirring component 104 includes a connecting seat 104a, a rotating shaft 104b rotatably connected to the upper end of the connecting seat 104a, and a spiral blade 104c welded to the periphery of the rotating shaft 104b.

[0051] Preferably, the spiral blade 104c guides the slurry to form a stable flow and avoids violent agitation. The entire stirring component 104 uses low-speed stirring, which can reduce the violent agitation of the slurry, thereby reducing the generation of foam.

[0052] When in use, there are two working modes for the spraying component 102 and the stirring component 104. Simultaneous coordinated work: First, the spraying component 102 is started, and the defoamer is evenly sprayed on the surface and inside of the slurry. After the spraying is completed, the stirring component 104 is started to mix the slurry to ensure the uniform distribution of the defoamer; Spraying first and then stirring: Start simultaneously, the stirring component 104 runs at a low speed to avoid violently agitating the slurry, and the spraying component 102 evenly sprays the defoamer into the slurry.

[0053] In summary, spraying first and then stirring is suitable for situations where foam is generated quickly and rapid response is required. It can quickly cover the foam area, reduce the waste of defoamer, avoid the stirring component from exacerbating foam generation, and improve the defoaming efficiency. Simultaneous spraying and stirring: Suitable for situations where instant mixing and prevention of defoamer precipitation are required. It can quickly distribute the defoamer, reduce foam generation, and achieve higher flexibility and adaptability through dynamic adjustment.

[0054] Embodiment 3

[0055] Refer to Figures 1 to 3 , which is the third embodiment of the present invention. The difference from the previous two embodiments is that the device further includes a control unit 100, including a foam induction component 101, a spraying component 102 arranged at the upper end of the foam induction component 101, and an antifoaming component 103 inserted and arranged at the top of the spraying component 102;

[0056] The foam induction component 101 is used to detect the foam content in the absorption tower; the spraying component 102 is used to spray the medicament into the absorption tower; the defoaming component 103 is used to provide the medicament for the spraying component 102.

[0057] Furthermore, it further includes a housing 200. The housing 200 includes an overflow pipe 201 inserted on the housing 200, a fixing frame 202 sleeved on the periphery of the housing 200, and an annular frame 203 sleeved inside the housing 200; the upper end of the fixing frame 202 is fixedly connected to the defoaming automatic control device 103b; the inner ring of the annular frame 203 sleeves the medicine collecting barrel 102d.

[0058] It should be noted that the fixing frame 202 is used to fix the defoaming automatic control device and provide a stable working space for it; the annular frame 203 is used to fix the spraying component 102 to keep the spraying component 102 stable in the absorption tower.

[0059] Embodiment 4

[0060] Refer to Figure 7 , which is the fourth embodiment of the present invention. This embodiment provides a control system.

[0061] Specifically, it includes a power module 300. By setting the power module 300 in the device, it provides power and power source for the whole device;

[0062] An alarm and transmission module 400. By setting the alarm and transmission module 400 in the device, it realizes signal transmission and alarm prediction among the foam induction component 101, the spraying component 102 and the defoaming component 103;

[0063] A control module 500. By setting the control module 500 in the device, it controls the medicine adding dose and rate of the defoaming component 103.

[0064] Preferably, the alarm and transmission module 400 is respectively connected to the adjustment sensor 101b, the medicine adding sensor 101c and the abnormal detection sensor 101d.

[0065] It should be noted that the power module 300 is the core support unit of the whole system, and its main function is to provide a stable and reliable power and power source for the device. The power module includes but is not limited to a power supply unit, a motor drive unit and a backup power system.

[0066] Furthermore, the alarm and transmission module 400 is the core of information interaction and early warning in the system. Its main function is to realize signal transmission among the foam induction component 101, the spraying component 102, and the defoaming component 103, and send out an alarm signal when an abnormal situation is detected. The alarm and transmission module receives real-time data from the adjustment sensor 101b, the chemical addition sensor 101c, and the abnormal detection sensor 101d in the foam induction component through sensor signal acquisition. When the sensor detects that the foam height reaches the preset alarm threshold, the alarm and transmission module will immediately trigger the corresponding alarm mechanism.

[0067] Even further, the control module 500 is responsible for processing the real-time data from the alarm and transmission module 400. When the foam height reaches the chemical addition sensor 101c, the control module 500 will start the first defoaming metering pump 103b-1 and adjust the operating frequency of the metering pump according to the foam rising speed and the real-time height. If the foam height continues to rise to the abnormal detection sensor 101d, the control module 500 will immediately increase the operating frequency of the first defoaming metering pump 103b-1 to the maximum, or switch to the second defoaming metering pump 103b-2 to ensure a rapid reduction in the foam volume and restore normal operation.

[0068] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. An apparatus for automatically controlling foaming in an absorption tower, characterized in that: Comprising: A control unit (100), including a foam induction component (101), a spraying component (102) arranged at the upper end of the foam induction component (101), and an anti-foaming component (103) inserted and arranged at the top of the spraying component (102); The foam induction component (101) is used to detect the foam content in the absorption tower; the spraying component (102) is used to spray medicament into the absorption tower; the anti-foaming component (103) is used to provide medicament for the spraying component (102).

2. The device for automatically controlling the foaming of the absorption tower according to claim 1, wherein: The foam induction component (101) includes a connection block (101a), an adjustment sensor (101b) fixedly arranged on the connection block (101a), a medicament adding sensor (101c) arranged above the adjustment sensor (101b), and an abnormal detection sensor (101d) arranged above the medicament adding sensor (101c).

3. The device for automatically controlling the foaming of the absorption tower according to claim 2, characterized in that: The spraying component (102) includes a spraying net (102a), a drainage block (102b) fixedly arranged on the spraying net (102a), a shunt pipe (102c) inserted and arranged at the upper end of the drainage block (102b), and a medicine collecting bucket (102d) inserted and arranged on the shunt pipe (102c).

4. The device for automatically controlling the foaming of the absorption tower according to claim 3, wherein: The anti-foaming component (103) includes an input pipe (103a), and an anti-foaming automatic control device (103b) inserted and arranged at one end of the input pipe (103a).

5. The device for automatically controlling the foaming of the absorption tower according to claim 4, characterized in that: The input pipe (103a) includes a medicine outlet (103a-1), and two groups of medicine inlets (103a-2) are arranged at one end far away from the medicine outlet (103a-1); the medicine outlet (103a-1) is inserted into the medicine collecting bucket (102d).

6. The device for automatically controlling the foaming of the absorption tower according to claim 5, characterized in that: The anti-foaming automatic control device (103b) includes a first anti-foaming metering pump (103b-1), and a second anti-foaming metering pump (103b-2) arranged at the upper end of the first anti-foaming metering pump (103b-1); the two groups of medicine inlets (103a-2) are respectively inserted into the first anti-foaming metering pump (103b-1) and the second anti-foaming metering pump (103b-2).

7. The device for automatically controlling the foaming of the absorption tower according to claim 6, wherein: The control unit (100) further includes a stirring component (104), the stirring component (104) includes a connection seat (104a), a rotating shaft (104b) rotatably connected and arranged at the upper end of the connection seat (104a), and a spiral blade (104c) welded on the periphery of the rotating shaft (104b).

8. The device for automatically controlling the foaming of the absorption tower according to claim 7, characterized in that: It further includes a housing (2):

9. A control system, characterized in that: Comprising the device for automatically controlling the foaming of the absorption tower according to any one of claims 2-8, including: Power module (300), by arranging the power module (300) inside the device, provides power and power source for the whole device; Alarm and transmission module (400), by arranging the alarm and transmission module (400) inside the device, realizes signal transmission and alarm prediction among the foam induction component (101), the spraying component (102) and the defoaming component (103); Control module (500), by arranging the control module (500) inside the device, controls the chemical dosing amount and chemical dosing rate of the defoaming component (103).

10. The control system according to claim 9, wherein: The alarm and transmission module (400) is respectively connected to the adjustment sensor (101b), the chemical dosing sensor (101c) and the abnormal detection sensor (101d).

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