Equipment for stable wet deacidification of waste incineration flue gas

Abstract

A stable wet deacidification device for waste incineration flue gas comprises a deacidification tower and a circulating alkali liquor pool, an air inlet, an air outlet, a liquid outlet, a spraying pipeline and a plurality of spraying heads are arranged in the deacidification tower, the circulating alkali liquor pool is communicated with the liquid outlet and the spraying pipeline, a plurality of flow blocking mechanisms are arranged between the air inlet and the spraying heads of the deacidification tower, and the spraying heads are communicated with the air outlet. The flow blocking mechanisms are distributed in a multi-layer staggered mode in the axial direction of the deacidification tower, and sliding holes and sealing rings are arranged at the positions, corresponding to the flow blocking mechanisms, of the peripheral face of the deacidification tower; the flow blocking mechanism comprises a sliding seat, a scraping plate and a driving air cylinder, the driving air cylinder is arranged outside the deacidification tower, a piston rod of the driving air cylinder penetrates through the sliding hole and extends into the deacidification tower to be fixedly connected with the sliding seat, a porous elastic cushion layer is arranged on the end face of the side, facing the air inlet, of the sliding seat, and the scraping plate is fixedly connected with the inner wall of the deacidification tower. The driving air cylinder drives the porous elastic cushion layer to make reciprocating contact with the scraper blade.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of equipment for stable wet-process deacidification of waste incineration flue gas. BACKGROUND

[0002] Flue gas deacidification treatment is mainly aimed at the flue gas of waste incineration, and the flue gas contains acid which has a great impact on atmospheric environment pollution. Waste incineration flue gas needs to be treated by a purification system, and the acidic hydrogen chloride and sulfide are neutralized. There are three methods: dry method, semi-dry method and wet method.

[0003] In the existing flue gas deacidification process using the spraying method, the flue gas is often introduced through a pipeline connected to a hole in the side wall of the spray tower, but this gas inlet method can cause uneven gas distribution in the tower, i.e., the flue gas concentration is higher on the side close to the pipeline opening, while the flue gas concentration is lower on the side far from the pipeline opening. This makes it difficult to control the PH value of the sprayed homogeneous alkaline water mist during neutralization. A high PH value can lead to waste of alkaline neutralizing substances, while a low PH value can result in poor neutralization effect on the side with high flue gas concentration. Moreover, some of the alkaline solution may not participate in the reaction and flow directly down during the spraying process, which can also lead to resource waste if not recycled.

[0004] Furthermore, since the introduced flue gas has a high flow rate, the contact time between the flue gas and the spraying liquid in the deacidification tower is too short, which also affects the deacidification effect.

[0005] Therefore, a flue gas deacidification treatment system is proposed to address the above problems. The flue gas in the deacidification tower is evenly distributed, and the flow rate is reduced to increase the contact time and effect of the flue gas with the spraying liquid, thereby improving the deacidification effect. SUMMARY

[0006] The utility model provides a kind of equipment for stable wet-process deacidification of waste incineration flue gas to solve the technical deficiency of the above.

[0007] The utility model discloses a technical scheme: a kind of equipment for waste incineration flue gas stable wet deacidification, including deacidification tower, circulating lye pool, the deacidification tower is provided with air inlet, gas outlet, liquid outlet, spray pipeline and several spray heads, the circulating lye pool is communicated with liquid outlet, spray pipeline respectively, the deacidification tower is provided with several flow blocking mechanisms between air inlet and spray head, the several flow blocking mechanisms are staggered distribution along the axial direction of deacidification tower, and the outer circumferential surface of deacidification tower is equipped with sliding hole and sealing ring corresponding to each flow blocking mechanism position;The flow blocking mechanism includes sliding seat, scraper, drive cylinder, and the drive cylinder is arranged outside the deacidification tower, the piston rod of the drive cylinder passes through sliding hole, extends to the deacidification tower and is fixedly connected with sliding seat, the end face of the side of sliding seat towards air inlet is provided with porous elastic pad layer, and the scraper is fixedly connected with the inner wall of deacidification tower and extends to the movement path of porous elastic pad layer, and the drive cylinder drives the reciprocating contact of porous elastic pad layer and scraper.

[0008] The several flow blocking mechanisms are alternately moved, drive the alternate displacement between each sliding seat, form the movable flow blocking air passage between gas outlet and spray head.

[0009] The utility model further provides: the equipment further includes wind ring spare, and the wind ring spare is arranged around deacidification tower, and the outer circumferential surface of deacidification tower is provided with several air inlet pipes, and the air inlet pipe includes air inlet, adapter, and the wind ring spare is provided with flue gas input pipeline, and the wind ring spare is communicated with each adapter, and the air inlet of each air inlet pipe is at the same axial height of deacidification tower, and the flue gas input deacidification tower of each other is mutually opposed.

[0010] The utility model further provides: the deacidification tower is provided with fine mesh screen between spray head and flow blocking mechanism.

[0011] The utility model further provides: the circulating lye pool includes liquid storage tank, liquid supplementing tank, circulating pump, and the liquid storage tank is communicated with liquid outlet, and the liquid storage tank is provided with waste liquid discharge pipe, and the circulating pump extracts lye in liquid storage tank to spray pipeline, and liquid supplementing pipe is arranged between liquid supplementing tank and liquid storage tank, and electric control valve is arranged on the liquid supplementing pipe.

[0012] The utility model further provides: stirring shaft is arranged in the liquid storage tank, and driving motor that cooperates with stirring shaft linkage is arranged outside the liquid storage tank.

[0013] The utility model has the beneficial effects that: one, the several flow blocking mechanisms designed in the application, such as the description attached Figure 1As shown, alternating motion can be performed, driving the sliding seats to move alternately, forming a movable baffle airway between the outlet and the spray head. As the sliding seats move and block, the baffle airway drives the rising flue gas at the outlet to be blocked and diverted by each sliding seat, thereby dynamically dispersing or merging the flue gas, so that the flue gas in the desulfurization tower is evenly distributed and can fully neutralize and react with the sprayed alkali solution.

[0014] Meanwhile, a porous elastic pad (preferably a sponge) is installed on the sliding seat. Its porous structure absorbs the sprayed alkaline solution, causing it to remain within the pad. Compared to traditional spraying where the alkaline solution drips directly out, this retention process prolongs the contact time between the alkaline solution and the flue gas, thus improving the neutralization reaction effect. Furthermore, during the regular reciprocating movement of the sliding seat, the porous elastic pad comes into contact with the scraper. Under the pressure of the scraper, the alkaline solution is squeezed out of the pad and discharged into the circulating alkaline solution tank. This ensures a certain retention time for the alkaline solution in the neutralization reaction while periodically discharging the old alkaline solution, allowing the porous elastic pad to absorb the newly sprayed alkaline solution, thus guaranteeing the deacidification effect.

[0015] Second, the design of the air ring component allows the flue gas to be blocked, diverted and slowed down before entering the desulfurization tower. Then, it enters the desulfurization tower through the connection port. At the same time, the air inlets of each air inlet pipe are at the same axial height of the desulfurization tower. The flue gas entering the desulfurization tower from each other counteracts each other, further disrupting the flue gas flow rate and making the flue gas evenly distributed in the desulfurization tower.

[0016] 3. The design of the circulating alkali solution tank is to collect the alkali solution dripping from the deacidification tower spray and replenish it with new alkali solution. The solution is then returned to the spray pipeline for use via a circulating pump. At the same time, a waste liquid discharge port is set up to discharge waste liquid, and a stirring shaft is set up to mix the new and old alkali solutions. Attached Figure Description

[0017] Figure 1 The structure of this utility model embodiment Figure 1 ;

[0018] Figure 2 The structure of this utility model embodiment Figure 2 ;

[0019] Figure 3 for Figure 1 The enlarged view of point A shown in the image.

[0020] Among them, 1-deacidification tower, 11-air inlet, 12-air outlet, 13-liquid outlet, 14-spray pipe, 15-spray head, 2-circulating alkali tank, 21-storage tank, 22-replenishment tank, 23-circulating pump, 24-stirring shaft, 3-baffle mechanism, 31-sliding seat, 32-scraper, 33-drive cylinder, 34-porous elastic pad, 4-air ring component, 41-air inlet pipe, 42-flue gas input pipe.

[0021] In order to better illustrate the present embodiment, some components in the drawings can be omitted, enlarged or reduced, and do not represent the actual size of the product. In addition, the drawings are only used for illustrative purposes and cannot be understood as a limitation on the present patent. DETAILED DESCRIPTION

[0022] In order to make the technical solutions of the present application and its advantages clearer, the technical solutions of the present application will be further described in detail below in conjunction with the drawings. It should be understood that the specific embodiments described herein are only part of the embodiments of the present application, and are only used to explain the present application, but not to limit the present application. It should be noted that, in order to facilitate description, only parts related to the present application are shown in the drawings, and other related parts can be referred to the usual design. In the case of no conflict, the embodiments in the present application and the technical features in the embodiments can be combined to obtain new embodiments.

[0023] The present utility model will be described in detail below in conjunction with the drawings, such as Figures 1-3

[0024] The equipment for stably removing acid from waste incineration flue gas by wet method comprises a deacidification tower 1 and a circulating alkali liquor pool 2. The deacidification tower 1 is internally provided with a gas inlet 11, a gas outlet 12, a liquid outlet 13, a spraying pipeline 14 and a plurality of spraying heads 15. The circulating alkali liquor pool 2 is in communication with the liquid outlet 13 and the spraying pipeline 14 respectively. A plurality of flow blocking mechanisms 3 are arranged between the gas inlet 11 and the spraying heads 15 of the deacidification tower 1. The plurality of flow blocking mechanisms 3 are distributed in a plurality of layers and staggered along the axial direction of the deacidification tower 1. Sliding holes and sealing rings are arranged on the outer circumferential surface of the deacidification tower 1 and correspond to the positions of the flow blocking mechanisms 3. The flow blocking mechanism 3 comprises a sliding seat 31, a scraper 32 and a driving cylinder 33. The driving cylinder 33 is arranged outside the deacidification tower 1. The piston rod of the driving cylinder 33 penetrates through the sliding hole and extends into the deacidification tower 1 to be fixedly connected with the sliding seat 31. A porous elastic pad layer 34 is arranged on the end face of the sliding seat 31 towards the side of the gas inlet 11. The scraper 32 is fixedly connected with the inner wall of the deacidification tower 1 and extends into the movement path of the porous elastic pad layer 34. The driving cylinder 33 drives the porous elastic pad layer 34 and the scraper 32 to reciprocally contact.

[0025] The plurality of flow blocking mechanisms 3 are alternately moved to drive the sliding seats 31 to alternately displace between each other, so as to form a movable flow blocking air duct between the gas outlet 12 and the spraying heads 15.

[0026] ​The equipment also includes an air ring component 4, which surrounds the deacidification tower 1. The outer circumference of the deacidification tower 1 is provided with several air inlet pipes 41, each of which includes an air inlet 11 and a connecting port. The air ring component 4 is provided with a flue gas input pipe 42, and the air ring component 4 is connected to each connecting port. The air inlets 11 of each air inlet pipe 41 are at the same axial height of the deacidification tower 1, and the flue gas input into the deacidification tower 1 is mutually opposed.

[0027] A fine-mesh filter screen 5 is provided between the spray head 15 and the flow-blocking mechanism 3 in the deacidification tower 1.

[0028] The circulating alkali solution tank 2 includes a storage tank 21, a replenishment tank 22, and a circulation pump 23. The storage tank 21 is connected to the drain outlet 13. The storage tank 21 is equipped with a waste liquid discharge pipe. The circulation pump 23 draws alkali solution from the storage tank 21 to the spray pipe 14. A replenishment pipe is provided between the replenishment tank 22 and the storage tank 21. An electrically controlled valve is installed on the replenishment pipe.

[0029] The liquid storage tank 21 is equipped with a stirring shaft 24, and a drive motor that is linked and cooperates with the stirring shaft 24 is installed outside the liquid storage tank 21.

[0030] The beneficial effects of this utility model are as follows: 1. The several flow-blocking mechanisms 3 designed in this application are shown in the appendix to the specification. Figure 1 As shown, alternating motion can be performed to drive the sliding seats 31 to move alternately, forming a movable flow-blocking air passage between the outlet 12 and the spray head 15. As the sliding seats 31 move and block, the rising flue gas at the outlet 12 is blocked and diverted by each sliding seat 31, thereby dynamically dispersing or merging the flue gas, so that the flue gas in the desulfurization tower 1 is evenly distributed and can fully neutralize and react with the sprayed alkali solution.

[0031] Meanwhile, the porous elastic pad 34 (preferably a sponge) provided on the sliding seat 31 absorbs the sprayed alkaline solution through its porous structure, causing it to remain in the porous elastic pad 34. Compared to the traditional method of spraying and directly discharging alkaline solution, the retention process prolongs the contact time between the alkaline solution and the flue gas, thereby improving the neutralization reaction effect. Furthermore, during the regular reciprocating movement of the sliding seat 31, the porous elastic pad 34 comes into contact with the scraper 32. Under the pressure of the scraper 32, the alkaline solution is squeezed out of the porous elastic pad 34 and discharged into the circulating alkaline solution tank 2. This ensures a certain retention time for the alkaline solution in the neutralization reaction while periodically discharging the old alkaline solution, allowing the porous elastic pad 34 to absorb the newly sprayed alkaline solution, thus guaranteeing the deacidification effect.

[0032] II. The design of the wind ring 4 makes the flue gas blocked, diverted and slowed down by the wind ring 4 before entering the deacidification tower 1, and then enters the deacidification tower 1 through the connecting interface. Meanwhile, the gas inlets 11 of the air inlet pipes 41 are at the same axial height of the deacidification tower 1, and the flue gas input into the deacidification tower 1 by the air inlet pipes 41 collides with each other, which further disrupts the flue gas, slows down the flow rate, and makes the flue gas evenly distributed in the deacidification tower 1.

[0033] III. The design of the circulating alkali solution pool 2 collects the alkali solution sprayed and dripped from the deacidification tower 1, and supplements new alkali solution, which is then sent back to the spraying pipeline 14 through the circulating pump 23 for use. Meanwhile, a waste liquid discharge port is arranged to discharge waste liquid, and a stirring shaft 24 is arranged to mix the new and old alkali solutions.

[0034] So far, the technical solution of the present application has been described in combination with the preferred embodiments shown in the drawings. It should be understood by those skilled in the art that the protection scope of the present application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to the related technical features without deviating from the principles of the present application, and the technical solutions after the changes or replacements will fall within the protection scope of the present application.

Claims

1. A device for stabilizing wet acid removal of waste incineration flue gas, comprising an acid removal tower and a circulating alkali solution tank, wherein the acid removal tower is provided with an air inlet, an air outlet, a liquid outlet, a spray pipe, and a plurality of spray heads, and the circulating alkali solution tank is connected to the liquid outlet and the spray pipe, characterized in that: The deacidification tower has several flow-blocking mechanisms between the air inlet and the spray head. These flow-blocking mechanisms are distributed in multiple layers along the axial direction of the deacidification tower. The outer circumference of the deacidification tower is provided with sliding holes and sealing rings corresponding to the positions of each flow-blocking mechanism. Each flow-blocking mechanism includes a sliding seat, a scraper, and a driving cylinder. The driving cylinder is located outside the deacidification tower. The piston rod of the driving cylinder passes through the sliding hole and extends into the deacidification tower to be fixedly connected to the sliding seat. The end face of the sliding seat facing the air inlet is provided with a porous elastic pad. The scraper is fixedly connected to the inner wall of the deacidification tower and extends into the moving path of the porous elastic pad. The driving cylinder drives the porous elastic pad to reciprocate in contact with the scraper. The several flow-blocking mechanisms move alternately, driving the sliding seats to move alternately to form a movable flow-blocking air passage between the air outlet and the spray head.

2. The equipment for stabilizing wet acid removal from waste incineration flue gas according to claim 1, characterized in that: The equipment also includes an air ring component that surrounds the deacidification tower. Several air inlet pipes are provided on the outer circumference of the deacidification tower. Each air inlet pipe includes an air inlet and a connection port. The air ring component is provided with a flue gas input pipe and is connected to each connection port. The air inlets of each air inlet pipe are at the same axial height of the deacidification tower, and the flue gas input into the deacidification tower from each other counteracts each other.

3. The equipment for stabilizing wet acid removal from waste incineration flue gas according to claim 2, characterized in that: The deacidification tower is equipped with a fine-mesh filter screen between the spray head and the flow-blocking mechanism.

4. The equipment for stabilizing wet acid removal of waste incineration flue gas according to claim 3, characterized in that: The circulating alkali solution tank includes a storage tank, a replenishment tank, and a circulation pump. The storage tank is connected to a drain outlet and is equipped with a waste liquid discharge pipe. The circulation pump draws alkali solution from the storage tank to a spray pipeline. A replenishment pipeline is provided between the replenishment tank and the storage tank, and an electrically controlled valve is installed on the replenishment pipeline.

5. The equipment for stabilizing wet acid removal of waste incineration flue gas according to claim 4, characterized in that: The liquid storage tank is equipped with a stirring shaft, and a drive motor that is linked and cooperates with the stirring shaft is installed outside the liquid storage tank.

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