Chemical adding device for acid pickling waste gas treatment

Abstract

Compared with the prior art, the dosing device for pickling waste gas treatment disclosed by the utility model has the following beneficial effects that during working, airflow can push the impeller to rotate and drive the rotating shaft to rotate, the rotating shaft drives the valve to rotate, and the control valve is configured to be that the higher the rotating speed of the valve is, the larger the opening degree is; therefore, the opening degree of the control valve can be adjusted according to the size of the air flow, and the larger the opening degree is, the more the alkali liquor can pass through the control valve is, so that the addition amount of the alkali liquor can be controlled according to the size of the air flow, the alkali liquor is matched with the air flow, the alkali liquor can be added more accurately, and the removal effect on acid mist in waste gas is guaranteed; comprising an air inlet pipe and a medicine adding pipe, and further comprises a control valve, the control valve comprises a columnar valve cavity and a columnar valve part coaxially and rotatably arranged in the valve cavity, the valve part is in driving connection with a rotating shaft, an impeller is arranged at the end, extending into the air inlet pipe, of the rotating shaft, and communicating openings are formed in the two opposite sides of the valve cavity.

Description

TECHNICAL FIELD

[0001] The utility model relates to waste gas treatment technical field especially, be used for pickling waste gas treatment's dosing device. BACKGROUND

[0002] In the metal surface processing treatment, pickling is one of the commonly used methods for cleaning the metal surface, acid mist waste gas is generated in the pickling process, acid mist waste gas has heavy pollution, therefore cannot direct emission, the currently commonly used processing method is that the acid mist containing waste gas is pumped to the purification tower through the air extractor, the acid mist in the waste gas is treated through the purification tower, the acid mist in the waste gas is reacted in the purification tower, and the purpose of removing the acid mist is achieved.

[0003] For example, the Chinese utility model patent with the application number 2022231947949 discloses an acid mist waste gas purification tower treatment device, which forms alkali liquor at the bottom of the tower, and then sprays the waste gas passing through the purification tower from bottom to top through the spraying mode, so as to achieve the effect of removing the acid mist in the waste gas, but when adding the alkaline medicament in the spraying tower, generally, the fixed-time and fixed-quantity addition is adopted, that is, a certain amount of medicament is added every time, this mode can cause the high initial medicament concentration of the added medicament, and the concentration is reduced in the later period, so the effect of removing the acid mist is also reduced, and therefore there is still room for improvement. UTILITY MODEL CONTENT

[0004] The utility model aims at solving the above problems and provides a dosing device for pickling waste gas treatment.

[0005] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows: a dosing device for pickling waste gas treatment, comprising an air inlet pipe and a dosing pipe, further comprising a control valve, the control valve comprises a cylindrical valve cavity and a valve piece coaxially arranged in the cylindrical valve cavity, the valve piece is drivingly connected with a rotating shaft, one end of the rotating shaft extending into the air inlet pipe is provided with an impeller, and opposite sides of the valve cavity are provided with communication ports.

[0006] Further, an annular groove is arranged on the outer periphery of the valve piece, the annular groove is located on one side of the valve piece, a plurality of liquid outlets are arranged on the outer periphery of the valve piece, the plurality of liquid outlets are uniformly and circumferentially spaced, a communication channel for communicating the plurality of liquid outlets and the annular groove is arranged in the valve piece, one of the communication ports is correspondingly arranged with a liquid outlet, and the other liquid outlet is correspondingly arranged with the annular groove.

[0007] Further, the annular groove comprises two annular grooves, and the two annular grooves are symmetrically arranged on both sides of the liquid outlet.

[0008] Further, two annular sealing pieces are arranged on the outer periphery of the valve piece in an axial direction, and the liquid outlet and the annular groove are arranged between the two annular sealing pieces.

[0009] Furthermore, the intake pipe includes a first section arranged axially along the shaft, with the end of the shaft extending into the first section.

[0010] Furthermore, a second section is connected to the side wall of the first section, and the other end of the second section is connected to the interior of the purification tower. The impeller is coaxially arranged with the rotating shaft.

[0011] Furthermore, the dosing tube is positioned above the air inlet pipe, the first section is vertically oriented, and an end cap is detachably mounted on the upper end of the first section, with the rotating shaft rotatably engaging with the end cap.

[0012] The dosing device for treating acid pickling waste gas disclosed in this utility model has the following advantages compared with the prior art: During operation, the airflow can drive the impeller to rotate, which in turn drives the shaft to rotate. The shaft drives the valve to rotate, and the control valve is configured such that the faster the rotation speed of the valve, the larger the opening. Therefore, the opening of the control valve can be adjusted according to the airflow. The larger the opening, the more alkali solution can pass through the control valve, thereby controlling the amount of alkali solution added according to the airflow, making the alkali solution match the airflow, and thus adding alkali solution more precisely to ensure the removal effect of acid mist in the waste gas. The device includes an air inlet pipe and a dosing pipe, and also includes a control valve. The control valve includes a columnar valve cavity and a columnar valve component coaxially rotatably disposed in the valve cavity. The valve component is driven and connected to a shaft. One end of the shaft extending into the air inlet pipe is provided with an impeller. Both sides of the valve cavity are provided with communication ports. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of a dosing device for treating acid pickling waste gas according to the present invention.

[0014] Figure 2 This is a cross-sectional structural schematic diagram of a dosing device for treating acid pickling waste gas according to the present invention.

[0015] Figure 3 for Figure 2 The diagram shown is a partially enlarged structural schematic of point A in a dosing device for treating acid pickling waste gas according to this utility model.

[0016] Figure 4 for Figure 3 The diagram shows a cross-sectional view of the BB section in a dosing device for treating acid pickling waste gas according to this invention.

[0017] Figure 5 for Figure 4 The diagram shows a cross-sectional view of the CC section in a dosing device for treating acid pickling waste gas according to this invention.

[0018] In the figure: 1, purification tower; 19, dosing pipe; 190, control valve; 19000, shell; 19001, cover; 1901, rotating shaft; 191, communication pipe; 1902, impeller; 1903, first bevel gear; 1904, second bevel gear; 1905, cylindrical valve cavity; 19050, valve cover; 1906, valve; 1907, sealing element; 1908, annular groove; 19080, first channel; 1909, second channel; 19090, liquid outlet; 2, air inlet pipe; 201, second section; 202, first section; 203, end cover. DETAILED DESCRIPTION

[0019] The utility model will be explained in further detail now in combination with the drawings. The drawings are simplified schematic diagrams, only schematically illustrate the basic structure of the utility model, therefore it only shows the structure related to the utility model.

[0020] Please refer to Figures 1-5 The technical scheme of the utility model is: a dosing device for pickling waste gas treatment, comprising an air inlet pipe 2 and a dosing pipe 19, further comprising a control valve 190, the control valve 190 comprises a cylindrical valve cavity 1905 and a valve 1906 coaxially arranged in the valve cavity, the valve 1906 is drivingly connected with a rotating shaft 1901, one end of the rotating shaft 1901 extending into the air inlet pipe 2 is provided with an impeller 1902, and opposite sides of the valve cavity are provided with communication ports.

[0021] Specifically, it is necessary to explain that, referring to Figure 1 、 Figure 2 The structure of the purification tower 1 in the application is consistent with the structure recorded in the background art, and the components arranged inside are also consistent. In order to avoid repetition, the specific details are not shown in the figure. The difference between the application and the background art and the improvement pointed out are that the dosing pipe 19 is communicated on the side wall of the spray tower, the control valve 190 is arranged at the middle position of the dosing pipe 19, referring to Figure 3 The control valve 190 comprises a rotating shaft 1901, one end of the rotating shaft 1901 is provided with a first bevel gear 1903, referring to Figure 4 、 Figure 3The control valve 190 comprises an outer housing 19000 and a cylindrical valve cavity 1905 arranged in the outer housing 19000, and the opposite sides of the valve cavity are provided with communication ports, one of which is communicated with the purification tower 1 through the dosing pipe 19, and the other is communicated with a section of the dosing pipe 19. The valve member 1906 is coaxially arranged in the cylindrical valve cavity 1905, and the valve member 1906 has a connecting column coaxially arranged and protruding out of the cylindrical valve cavity 1905. The connecting column is coaxially provided with a second bevel gear 1904 engaged with the first bevel gear 1903. In this way, in operation, the dosing pipe 19 connected to the other communication port is communicated with the lye pool containing lye, and a liquid pump is arranged between the lye pool and the dosing pipe 19 to supply lye at a constant pressure. When the waste gas containing acid mist flows into the purification tower 1 through the gas inlet pipe 2, the airflow can drive the impeller 1902 to rotate, drive the rotating shaft 1901 to rotate, and drive the valve member 1906 to rotate. The control valve 190 is configured such that the faster the rotating speed of the valve member 1906, the larger the opening degree. Therefore, the opening degree of the control valve 190 can be adjusted according to the size of the airflow, and the larger the opening degree, the more lye can pass through the control valve 190, so that the amount of lye added can be controlled according to the size of the airflow, so that the lye can be matched with the airflow, thereby more accurately adding lye and ensuring the removal effect of acid mist in the waste gas.

[0022] Further, as a specific embodiment, reference is made to Figures 3-5 The specific structure inside the valve member 1906 is that the outer peripheral surface of the valve member 1906 is provided with an annular groove 1908, and a plurality of liquid outlets 19090 are arranged on the outer peripheral surface of the valve member 1906. The plurality of liquid outlets 19090 are uniformly and circumferentially spaced apart, and the valve member is provided with a communication channel communicating the plurality of liquid outlets 19090 and the annular groove 1908. One of the communication ports is arranged corresponding to the liquid outlet 19090, and the other liquid outlet 19090 is arranged corresponding to the annular groove 1908.

[0023] Specifically, the valve member 1906 is arranged in the cylindrical valve cavity 1905, and one end of the cylindrical valve cavity 1905 is open, and the valve cover 19050 is arranged at the opening. Reference is made to Figure 5The upper section of the dosing pipe 19 is in communication with the valve cavity at a position corresponding to the position of the liquid outlet 19090, and the other side of the valve cavity is in communication with a communication pipe 191, which is also connected to a section of the dosing pipe. The position where the communication pipe 191 is in communication with the cylindrical valve cavity 1905 corresponds to the position of the annular groove 1908. The communication channel includes a first channel 19080 and a second channel 1909, which are in communication with each other, so that the annular groove 1908 is in communication with the liquid outlet 19090. During operation, the section of the dosing pipe 19 connected to the communication pipe 191 is in communication with the liquid caustic soda tank, and the other section of the dosing pipe 19 is in communication with the interior of the purification tower 1. When the valve rotates, the annular groove 1908 is always in communication with the liquid caustic soda tank, and the multiple liquid outlets 19090 are alternately in communication with the communication port. When the liquid outlet 19090 corresponds to the communication port, the caustic soda can flow out through the upper section of the dosing pipe 19 and then flow into the purification tower 1. The faster the valve 1906 rotates, the more times the liquid outlet 19090 and the upper section of the dosing pipe 19 are in communication, and the more caustic soda can flow out through the liquid outlet 19090, achieving the purpose of adjusting the opening degree.

[0024] Further, as a specific embodiment, with reference to Figure 4 、 Figure 5 , the annular groove 1908 includes two, which are symmetrically arranged on both sides of the liquid outlet 19090. Specifically, the communication pipe 191 is correspondingly provided with two.

[0025] Further, as a specific embodiment, along the axial direction, two annular sealing members 1907 are arranged on the outer periphery of the valve member at intervals, and the liquid outlet 19090 and the annular groove 1908 are arranged between the two annular sealing members 1907. With reference to Figure 4 、 Figure 5 , the outer periphery of the cylindrical valve member 1906 is in sliding sealing cooperation with the inner periphery of the cylindrical valve cavity 1905. The outer periphery is provided with a groove, and the annular sealing member 1907 is arranged in the groove, so as to ensure the sealing property of the cylindrical valve cavity 1905 and the valve member 1906, and reduce the probability of liquid leakage.

[0026] Further, with reference to Figure 4 , the top of the shell 19000 is detachably provided with a cover 19001. By arranging the cover 19001, the installation and maintenance of the second bevel gear 1904 inside can be facilitated.

[0027] Further, as a specific embodiment, with reference to Figure 3 , the air inlet pipe 2 includes a first section 202 arranged along the axial direction of the rotating shaft 1901, and the end of the rotating shaft 1901 extends into the first section 202. Specifically, by this arrangement, the arrangement of the rotating shaft 1901 is facilitated, and the impeller 1902 can be directly coaxially sleeved on the rotating shaft 1901, simplifying the structure.

[0028] Further, as a preferred embodiment, the side wall of the first section 202 is communicated with the second section 201, the other end of the second section 201 is communicated with the inside of the purification tower 1, and the impeller 1902 is coaxially arranged with the rotating shaft 1901.

[0029] Further, as a specific embodiment, referring to Figures 1-3 , the dosing pipe 19 is arranged above the air inlet pipe 2, the first section 202 is vertically arranged, the upper end of the first section 202 is detachably provided with an end cover, and the rotating shaft 1901 is rotationally matched with the end cover. Specifically, through the above structure arrangement, the first section 202 is vertically arranged, the upper end is closed, and the lower end is used for the entry of the exhaust gas. The upward flow of the exhaust gas can better push the impeller 1902. Through the arrangement of the detachable end cover, the rotating shaft 1901 is convenient to disassemble and install, so as to facilitate the subsequent replacement and maintenance of the impeller 1902.

[0030] Obviously, the above embodiments are only examples for clearly illustrating, but not limitation to the embodiments. For those skilled in the art, on the basis of the above description, other different forms of changes or variations can also be made. Here, it is not necessary and also impossible to enumerate all the embodiments. The obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A dosing device for treating pickling waste gas, comprising an air inlet pipe (2) and a dosing pipe (19), characterized in that, It also includes a control valve (190), which includes a columnar valve chamber (1905) and a columnar valve element (1906) coaxially rotatably disposed in the valve chamber. The valve element (1906) is driven and connected to a rotating shaft (1901). One end of the rotating shaft (1901) that extends into the air intake pipe (2) is provided with an impeller (1902). Both sides of the valve chamber are provided with communication ports. The outer peripheral surface of the valve (1906) is provided with an annular groove (1908), and a plurality of liquid outlets (19090) are provided on one side of the annular groove (1908). The plurality of liquid outlets (19090) are evenly spaced along the circumference. The valve (1906) is provided with a connecting channel connecting the plurality of liquid outlets (19090) and the annular groove (1908). One of the connecting channels is provided corresponding to one of the liquid outlets (19090), and another liquid outlet (19090) is provided corresponding to one of the annular grooves (1908).

2. The dosing device for treating acid pickling waste gas according to claim 1, characterized in that, The annular groove (1908) includes two, and the two annular grooves (1908) are symmetrically arranged on both sides of the liquid outlet (19090).

3. The dosing device for treating pickling waste gas according to claim 2, characterized in that, Along the axial direction, two annular seals (1907) are spaced apart on the outer circumferential surface of the valve (1906), and the liquid outlet (19090) and the annular groove (1908) are located between the two annular seals (1907).

4. The dosing device for treating pickling waste gas according to claim 1, characterized in that, The intake pipe (2) includes a first section (202) arranged axially along a rotating shaft (1901), the end of which extends into the first section (202).

5. A dosing device for treating pickling waste gas according to claim 4, characterized in that, The second section (201) is connected to the side wall of the first section (202), and the other end of the second section (201) is connected to the interior of the purification tower (1). The impeller (1902) is coaxially arranged with the rotating shaft (1901).

6. A dosing device for treating pickling waste gas according to claim 5, characterized in that, The dosing tube (19) is located above the air inlet tube (2). The first section (202) is vertically arranged. The upper end of the first section (202) is detachably provided with an end cap. The rotating shaft (1901) is rotatably engaged with the end cap.

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