CN220459969U

CN220459969U - Foam collection device and absorption tower

Info

Publication number: CN220459969U
Application number: CN202320703096.2U
Authority: CN
Inventors: 李彦
Original assignee: Baotou No3 Thermal Power Plant Of North United Power Co ltd
Current assignee: Baotou No3 Thermal Power Plant Of North United Power Co ltd
Priority date: 2023-03-31
Filing date: 2023-03-31
Publication date: 2024-02-09
Anticipated expiration: 2033-03-31

Abstract

The utility model relates to a foam collecting device and an absorption tower, wherein the foam collecting device comprises: the device comprises a collecting box, a discharge pipe and a floating ball level gauge. The collecting box is hollow, and a containing cavity for containing slurry and foam is arranged in the collecting box. The top of the collection box is provided with a discharge port so that the slurry and foam of the absorption tower enter the accommodating cavity through the discharge port. The discharge pipe is arranged at the bottom of the collecting box and is used for discharging the slurry and the foam contained in the containing cavity. The floating ball liquid level meter is arranged in the accommodating cavity and fixedly connected with the side wall of the collecting box, and is used for monitoring the liquid level height of the slurry and the foam in the accommodating cavity. The discharge pipe is provided with a foam throttle valve for intercepting foam and foaming substances. The overflow foam can be automatically collected, so that foaming substances in the absorption tower can be reduced, the using amount of the defoaming agent is reduced, excessive manual intervention is not needed, and the cost is further saved.

Description

Foam collection device and absorption tower

Technical Field

The utility model relates to the technical field of foam treatment equipment of an absorption tower of a power plant, in particular to a foam collecting device and an absorption tower.

Background

SO2 is one of main atmospheric pollutants and is one of important control indexes of industrial waste gas pollution emission in China. At present, all coal-fired units in China implement flue gas desulfurization engineering, wherein the dominant desulfurization technology is limestone/gypsum wet flue gas desulfurization technology.

In the desulfurization process of the limestone-gypsum wet method, slurry foaming is extremely easy to cause due to the dust content, heavy metal substances, greasy dirt and the like in flue gas, and the false liquid level caused by foam generation is far higher than the measured liquid level due to the fact that a differential pressure type liquid level meter is commonly adopted in an absorption tower for liquid level measurement, so that the absorption tower intermittently overflows. When the slurry bubbling overflow of the absorption tower is serious, accidents can be caused if the slurry bubbling overflow of the absorption tower cannot be monitored in time and effective measures can be taken. Meanwhile, the slurry foam of the absorption tower overflows and then enters a drainage pit, and is pumped back to the absorption tower through a pit pump for repeated use, so that foam-forming substances can still be enriched in the absorption tower, the slurry is deteriorated, the desulfurization efficiency is affected, the load of a unit is limited, and even the unit is stopped. In order to reduce the slurry foam, a defoaming agent is generally added into a drainage pit of an absorption tower regularly, or overflow foam is cleaned manually, so that the aim of reducing the slurry foam is fulfilled, but the method is high in cost and incapable of reducing foaming substances in the absorption tower, and the symptoms and the root causes are not treated.

Thus, it is currently difficult to handle the foaming material from within the absorber.

Disclosure of Invention

The utility model provides a foam collecting device and an absorption tower, which are used for solving the problem that foam substances from the absorption tower are difficult to treat at present.

To achieve the object of the present utility model, there is provided a foam collecting apparatus comprising: the collecting box is hollow, and a containing cavity for containing slurry and foam is arranged in the collecting box; the top of the collecting box is provided with a discharge port so that the slurry and foam of the absorption tower enter the accommodating cavity through the discharge port; the discharge pipe is arranged at the bottom of the collecting box and is used for discharging the slurry and the foam contained in the containing cavity; the floating ball liquid level gauge is arranged in the accommodating cavity and fixedly connected with the side wall of the collecting box, and is used for monitoring the liquid level height of slurry and foam in the accommodating cavity; the discharge pipe is provided with a foam throttle valve for intercepting foam and foaming substances.

In some embodiments, the bottom of the side wall of the collecting box is provided with a discharge outlet for connecting with a discharge pipe; the inner side wall of the collecting box is provided with a fixing groove for fixing the floating ball liquid level meter; the level of the fixing groove is higher than the discharge opening.

In some of these embodiments, a stirring mechanism is provided on the bottom surface of the interior of the collection bin for stirring the sediment in the containment chamber.

In some of the specific embodiments, the bottom of the collecting box is also provided with a plurality of universal wheels, and each universal wheel is provided with a brake pad; one side of the collecting box is also provided with a manhole door.

In some embodiments, the float gauge comprises: the floating ball is a hollow sphere; one end of the connecting rod is connected with the floating ball; the fixed block is connected with the other end of the connecting rod and can be embedded into the fixed groove.

In some embodiments, the fixed block is hollow; an insertion hole is formed in one side of the fixed block; the connecting rod is inserted into the fixed block through the insertion hole; an elastic waterproof membrane is arranged between the outer wall of the connecting rod and the inner wall of the insertion hole.

In some embodiments, a micro switch is arranged inside the fixed block; the connecting rod is inserted and is provided with the lug on locating the inside one end of fixed block, and the lug is located micro-gap switch's below to when making the floater natural sag, the lug can with micro-gap switch butt.

In some embodiments, the foam collection apparatus further comprises: and the controller is used for controlling the opening degree of the foam throttle valve and the opening and closing of the stirring mechanism.

In some embodiments, the signal output end of the micro switch is electrically connected with the signal input end of the controller, and the signal output end of the controller is electrically connected with the signal input ends of the foam throttle valve and the stirring mechanism respectively.

An absorber based on the same concept, comprising: the upper part of the absorption tower is provided with an overflow port, and the overflow port is connected with an overflow pipe for overflow slurry and foam to flow out; a foam collection apparatus as in any one of the embodiments above; one end of the overflow pipe far away from the absorption tower is connected with the discharge port of the collecting box so as to enable the overflow port of the absorption tower to be communicated with the accommodating cavity.

The utility model has the beneficial effects that:

the foam collecting device can automatically collect overflow foam, so that foaming substances in the absorption tower can be reduced, the using amount of the defoaming agent is reduced, excessive manual intervention is not needed, and the cost is further saved.

According to the absorption tower, the foam collecting device is arranged at the overflow port of the absorption tower, so that the overflow foam can be automatically collected, foam forming substances in the absorption tower can be reduced, the using amount of a defoaming agent is reduced, excessive manual intervention is not needed, and the cost is further saved.

Drawings

FIG. 1 is a schematic view of some embodiments of a foam collection apparatus of the present utility model;

FIG. 2 is a schematic diagram of some embodiments of the float gauge shown in FIG. 1;

fig. 3 is a schematic view showing the structure of some embodiments of an absorber of the present utility model.

In the drawing, 100, a collection box; 110. an exhaust inlet; 120. a stirring mechanism; 130. a universal wheel; 200. a discharge pipe; 210. a foam throttle valve; 300. a floating ball level gauge; 310. a floating ball; 320. a connecting rod; 321. a bump; 330. a fixed block; 331. an elastic waterproof membrane; 332. a micro-switch; 400. an absorption tower; 410. and (3) an overflow pipe.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

Examples of the embodiments are illustrated in the accompanying drawings, wherein like or similar symbols indicate like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "top," "bottom," "inner," "outer," "axis," "circumferential," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience in describing the present utility model or simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," "engaged," "hinged," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Referring to fig. 1, 2 and 3, a foam collecting apparatus includes a collecting tank 100, a drain pipe 200 and a float gauge 300. The collection box 100 is hollow and has a receiving chamber therein for receiving slurry and foam. The top of the collection tank 100 is provided with a discharge inlet 110 so that the slurry and foam of the absorption tower 400 enter the receiving chamber through the discharge inlet 110. A discharge pipe 200 is provided at the bottom of the collection tank 100 for discharging the slurry and the foam contained in the containing chamber. The float gauge 300 is disposed in the receiving chamber and fixedly coupled to the sidewall of the collection tank 100 for monitoring the level of slurry and foam in the receiving chamber. A foam throttle valve 210 is provided on the discharge pipe 200 for intercepting foam and foaming substances.

Specifically, the collecting box 100 has a hollow structure, and the hollow position is a containing cavity inside the collecting box 100, and slurry and foam overflowed from the absorption tower 400 can be contained in the containing cavity. The top surface of the collection tank 100 is provided at the middle thereof with a discharge port 110, and the slurry and foam overflowed from the absorption tower 400 can enter the receiving chamber of the collection tank 100 through the discharge port 110. A drain pipe 200 is connected to the bottom of one side of the collection tank 100, and slurry foam in the receiving chamber can be discharged through the drain pipe 200. Meanwhile, the foam throttle valve 210 is provided on the discharge pipe 200, so that the foam and the foaming material therein can be blocked when the slurry foam is discharged, so that the foam and the foaming material are stored in the receiving cavity of the collecting box 100, and the slurry in the absorption tower 400 is prevented from being deteriorated due to the backflow of the foam. The floating ball liquid level meter 300 is arranged in the accommodating cavity in the collecting box 100, the floating ball liquid level meter 300 is fixedly connected with the inner wall of the collecting box 100 and is used for monitoring the liquid level of the slurry foam in the accommodating cavity of the collecting box 100, if the liquid level of the slurry foam in the accommodating cavity rises and triggers the floating ball liquid level meter 300, the condition of overflow of the slurry foam in the absorption tower 400 is severe, and at the moment, a worker can adjust the opening of the foam throttle valve 210 according to the display condition of the floating ball liquid level meter 300 so as to accelerate the efficiency of foam collection.

Wherein, the material of collecting box 100 is cast iron, and the diameter is 800 millimeters, and highly is 1600 millimeters, and the volume of the internal chamber that holds is 0.8 cubic meters. The drain pipe 200 is a cast iron pipe, and is disposed on the sidewall of the collecting box 100 at a distance of 50 mm from the bottom of the collecting box 100, and the diameter of the drain pipe 200 is 100 mm.

In some embodiments of the present utility model, the bottom of the sidewall of the collection tank 100 is provided with a discharge port for connecting the discharge pipe 200, and one end of the discharge pipe 200 is fixedly connected with the collection tank 100 through the discharge port, so that the slurry foam in the collection tank 100 is discharged from the receiving chamber. The inner sidewall of the collecting box 100 is provided with a fixing groove for fixing the floating ball level gauge 300, and the floating ball level gauge 300 can be inserted into the fixing groove, so that the installation is convenient. The level of the fixed slot is slightly higher than the discharge outlet, when the level of the slurry foam in the collection tank 100 rises and exceeds the position of the discharge outlet, and then continues to rise to reach the position of the fixed slot, the floating ball level gauge 300 is triggered, at this time, the efficiency of foam collection needs to be increased, and the opening of the foam throttle valve 210 can be adjusted by a worker, so that the slurry foam in the collection tank 100 can be discharged through the discharge pipe 200 more smoothly and quickly, and more foam and foaming substances are captured and stored in the containing cavity of the collection tank 100.

In some embodiments of the present utility model, the stirring mechanism 120 is provided on the bottom surface of the inside of the collection tank 100, and is used for stirring the sediment in the accommodating cavity, so as to stir the slurry foam overflowed from the absorption tower 400, and prevent part of the sediment therein from blocking the discharge outlet, thereby affecting the discharge of the slurry foam.

In some embodiments of the present utility model, the bottom of the collecting box 100 is further provided with a plurality of universal wheels 130, each universal wheel 130 is provided with a brake pad, when the foam collecting device needs to be cleaned and overhauled, the foam collecting device can be conveniently moved to a proper position through the plurality of universal wheels 130 arranged at the bottom, and the foam collecting device is locked at the proper position through the brake pads arranged on each universal wheel 130. One side of the collecting box 100 is further provided with a manhole door, and when the foam collecting device is moved to a proper position for cleaning and overhauling, all parts arranged in the accommodating cavity inside the collecting box 100 can be overhauled through the manhole door, and substances left by foam in the accommodating cavity inside the collecting box 100 can be cleaned and collected regularly through the manhole door.

In some embodiments of the present utility model, the float gauge 300 includes a float 310, a connecting rod 320, and a fixed block 330. The floating ball 310 is a hollow sphere. One end of the connecting rod 320 is connected with the floating ball 310. The fixing block 330 is connected with the other end of the connection rod 320, and the fixing block 330 may be inserted into the fixing groove.

Specifically, the fixing block 330 may be just embedded into the fixing groove, so that the fixing block 330 is fixed on the inner wall of the collecting box 100, one end of the connecting rod 320 is movably connected with the fixing block 330, so that the connecting rod 320 can rock up and down in the fixing block 330, and the other end of the connecting rod 320 is fixedly connected with the floating ball 310, so that the floating ball 310 and the connecting rod 320 are fixed on the inner wall of the collecting box 100 together through the fixing block 330. When the liquid level of the slurry foam in the collection box 100 is lower, the whole of the floating ball 310 and the connecting rod 320 is in a natural sagging state, and when the liquid level of the slurry foam in the collection box 100 is raised to contact with the floating ball 310, the whole of the floating ball 310 and the connecting rod 320 can move upwards under the action of the buoyancy force, the natural sagging state is not maintained any more, and at the moment, the floating ball level gauge 300 can give an alarm to a worker to remind the worker of needing to adjust the opening of the foam throttle valve 210.

In some embodiments of the present utility model, the fixed block 330 is hollow. One side of the fixing block 330 is provided with an insertion hole. The connection rod 320 is inserted into the inside of the fixing block 330 through the insertion hole. An elastic waterproof membrane 331 is provided between the outer wall of the connection rod 320 and the inner wall of the insertion hole. Inside the fixed block 330 is provided a micro switch 332. The connecting rod 320 is inserted into the fixing block 330, and a bump 321 is disposed at one end of the fixing block, where the bump 321 is located below the micro switch 332, so that when the floating ball 310 naturally sags, the bump 321 can abut against the micro switch 332.

Specifically, the fixing block 330 is hollow, an insertion hole is formed in a side wall of one side of the fixing block 330, the diameter of the insertion hole is larger than that of the connecting rod 320, one end of the connecting rod 320 can be inserted into the fixing block 330 through the insertion hole, a layer of elastic waterproof membrane 331 is arranged between the outer wall of the connecting rod 320 and the inner wall of the insertion hole, gaps between the connecting rod 320 and the insertion hole are filled with the elastic waterproof membrane 331, the connecting rod 320 can be firmly fixed on the fixing block 330, meanwhile, slurry foam is prevented from flowing into the fixing block 330 by virtue of the waterproof property of the elastic waterproof membrane 331, and the connecting rod 320 fixed on the fixing block 330 can slightly shake due to the elastic property. And, be provided with the lug 321 on the one end that connecting rod 320 inserted to fixed block 330 is inside, be provided with micro-gap switch 332 on the top surface of fixed block 330 inside, micro-gap switch 332 is located the top of connecting rod 320, and just to lug 321 on the connecting rod 320, when the whole of floater 310 and connecting rod 320 is in the nature sagging state, use the patchhole as the fulcrum, the one end that is provided with lug 321 on the connecting rod 320 can slightly upwards move for lug 321 and micro-gap switch 332 butt from top to bottom, at this moment, floater level gauge 300 can not report to the police to the staff, when lug 321 and micro-gap switch 332 no longer butt, floater level gauge 300 can report to the police to the staff.

In some embodiments of the present utility model, the foam collection apparatus further includes a controller for controlling the opening of the foam throttle valve 210 and the opening and closing of the agitation mechanism 120. The signal output of the microswitch 332 is electrically connected to the signal input of the controller, which is electrically connected to the signal inputs of the foam throttle 210 and the agitation mechanism 120, respectively.

Specifically, the floating ball 310 is located in the accommodating cavity inside the collecting box 100, when the liquid level of the slurry foam in the accommodating cavity rises to reach the floating ball 310, the floating ball 310 is made to rise by a small distance under the action of the buoyancy force, the insertion hole is used as a supporting point, one end of the connecting rod 320 provided with the protruding block 321 is lowered by a small distance, the protruding block 321 is separated from the micro switch 332, at this time, the micro switch 332 can send a signal of overhigh liquid level of the slurry foam to the controller, and then the controller can send an instruction of increasing the opening degree to the foam throttle valve 210, so that the efficiency of collecting the foam and foaming substances is improved, and the controller can send an instruction of opening to the stirring mechanism 120, and the stirring mechanism 120 is started to avoid the situation that the slurry solid substances in the accommodating cavity of the collecting box 100 settle, so that the produced sediment blocks the discharge pipe 200. When the liquid level of the slurry foam in the accommodating cavity is reduced, the floating ball 310 is lowered by a small distance, the insertion hole is taken as a supporting point, one end of the connecting rod 320 provided with the protruding block 321 is raised by a small distance, the protruding block 321 is contacted with the micro switch 332, at this time, the micro switch 332 can transmit a signal that the liquid level of the slurry foam is reduced to the controller, and then the controller can transmit an instruction for reducing the opening degree to the foam throttle valve 210 and also transmit an instruction for closing to the stirring mechanism 120, so that the overall energy consumption of the foam collecting device is reduced, and overlarge energy consumption is avoided.

The utility model also provides an absorber tower comprising an absorber tower 400 and a foam collection apparatus as described in any one of the embodiments above. An overflow port is provided at the upper portion of the absorption tower 400, and an overflow pipe 410 is connected to the overflow port for overflow slurry and foam to flow out. The overflow pipe 410 is connected at an end remote from the absorption tower 400 to the discharge inlet 110 of the collecting tank 100 so that the overflow port of the absorption tower 400 communicates with the receiving chamber.

Specifically, an overflow port is formed at one side of the upper portion of the absorption tower 400, one end of the overflow pipe 410 is connected with the overflow port, and the other end is connected with the discharge port 110 of the collection box 100, so that the overflow port of the absorption tower 400 is communicated with the receiving cavity of the collection box 100, and when the slurry foam in the absorption tower 400 is excessive, the slurry foam can enter the receiving cavity of the collection box 100 through the overflow pipe 410.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "examples," "particular examples," "one particular embodiment," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The present utility model is not limited to the above preferred embodiments, and any person skilled in the art, within the scope of the present utility model, may apply to the present utility model, and equivalents and modifications thereof are intended to be included in the scope of the present utility model.

Claims

1. A foam collection apparatus comprising:

the collecting box is hollow, and a containing cavity for containing slurry and foam is arranged in the collecting box;

a discharge port is arranged at the top of the collecting box so that the slurry and foam of the absorption tower enter the accommodating cavity through the discharge port;

the discharge pipe is arranged at the bottom of the collecting box and is used for discharging the slurry and the foam contained in the containing cavity;

the floating ball liquid level gauge is arranged in the accommodating cavity and fixedly connected with the side wall of the collecting box, and is used for monitoring the liquid level height of the slurry and the foam in the accommodating cavity;

the discharge pipe is provided with a foam throttle valve for intercepting foam and foaming substances.

2. The foam collecting apparatus as claimed in claim 1, wherein a discharge port is opened at a bottom of a sidewall of the collecting box for connection with the discharge pipe;

the inner side wall of the collecting box is provided with a fixing groove for fixing the floating ball liquid level meter;

the fixing groove is higher than the discharge opening in level.

3. The foam collecting apparatus according to claim 2, wherein a stirring mechanism for stirring the sediment in the accommodation chamber is provided on a bottom surface of an inside of the collection box.

4. The foam collecting device according to claim 3, wherein the bottom of the collecting box is further provided with a plurality of universal wheels, and each universal wheel is provided with a brake pad;

one side of the collecting box is also provided with a manhole door.

5. The foam collection apparatus of claim 3 or 4, wherein the float gauge comprises:

the floating ball is a hollow sphere;

one end of the connecting rod is connected with the floating ball;

the fixed block is connected with the other end of the connecting rod, and the fixed block can be embedded into the fixed groove.

6. The foam collection apparatus of claim 5, wherein said fixed block is hollow;

an insertion hole is formed in one side of the fixed block;

the connecting rod is inserted into the fixing block through the insertion hole;

an elastic waterproof membrane is arranged between the outer wall of the connecting rod and the inner wall of the insertion hole.

7. The foam collecting apparatus as claimed in claim 6, wherein a micro switch is provided inside the fixed block;

the connecting rod is inserted and arranged at one end inside the fixed block and is provided with a lug, and the lug is positioned below the micro switch, so that when the floating ball naturally sags, the lug can be abutted with the micro switch.

8. The foam collection apparatus of claim 7, wherein the foam collection apparatus further comprises:

and the controller is used for controlling the opening degree of the foam throttle valve and the opening and closing of the stirring mechanism.

9. The foam collection apparatus of claim 8, wherein the signal output of the microswitch is electrically connected to the signal input of the controller, the signal output of the controller being electrically connected to the signal inputs of the foam throttle and the agitation mechanism, respectively.

10. An absorption tower, comprising:

the upper part of the absorption tower is provided with an overflow port, and the overflow port is connected with an overflow pipe for overflow slurry and foam to flow out;

a foam collecting device according to any one of claims 1 to 9;

one end of the overflow pipe, which is far away from the absorption tower, is connected with the discharge inlet of the collecting box, so that the overflow port of the absorption tower is communicated with the accommodating cavity.