Wastewater treatment device for heat exchanger and treatment method thereof

Abstract

The invention discloses a wastewater treatment device for a heat exchanger and a treatment method of the wastewater treatment device, and belongs to the technical field of wastewater treatment.The wastewater treatment device comprises a treatment box, a storage barrel used for storing a neutralizer is installed in the treatment box, a filter screen is installed in the treatment box, an air bag is slidably arranged in the treatment box, and a pressing block is fixed in the treatment box; according to the wastewater treatment device disclosed by the invention, the air bag and the distance sensor are arranged, so that the floating height of the air bag can be judged through the distance sensor, the water level in the treatment box can be judged, automatic control on water injection is realized, and the water injection efficiency is improved. After the air bag makes contact with the pressing block, air in the air bag can be extruded against rising of the water level, the neutralizer in the storage barrel is extruded into the treatment box, automatic adding of the neutralizer is achieved, the compression degree of the air bag can be judged through data detected by a distance sensor, and therefore the adding amount of the neutralizer is judged.

Description

Technical Field

[0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a wastewater treatment device for a heat exchanger and a treatment method thereof. Background Art

[0002] Iron and steel are often called black metals, which are divided into raw (cast) iron, wrought iron and steel. A large amount of wastewater is generated during the production of steel, such as ironmaking workshop wastewater, steelmaking workshop wastewater and steel rolling workshop wastewater.

[0003] When treating steel wastewater, it can be heated by a heat exchanger for heating purposes. However, since the pH value of steel wastewater is generally below 1.5 (free acid 0.5-2%), it is strongly acidic and contains a large amount of impurities. If it is directly input into a heat exchanger, it may cause noise corrosion to the heat exchanger and heating equipment, affecting their service life. At the same time, impurities in the wastewater will also clog the pipeline. In order to solve the above problems, a wastewater treatment device for a heat exchanger and a treatment method thereof are provided.

[0004] It should be noted that the above contents belong to the technical knowledge of the inventor and do not necessarily constitute prior art. Summary of the invention

[0005] In order to solve the above problems, the purpose of the present invention is to provide a wastewater treatment device for a heat exchanger and a treatment method thereof. By arranging an airbag and a distance sensor, the floating height of the airbag can be determined by the distance sensor, thereby determining the water level in the treatment box and realizing automatic control of water injection. After the airbag contacts the pressing block, the air in the airbag can be squeezed according to the rising water level, and the neutralizer in the storage cylinder can be squeezed into the treatment box to realize automatic addition of the neutralizer. The compression degree of the airbag can also be determined by the data detected by the distance sensor, thereby determining the amount of neutralizer added.

[0006] To achieve the above-mentioned purpose, the present invention proposes a wastewater treatment device for a heat exchanger, the wastewater treatment device comprising a treatment box, a storage cylinder for storing a neutralizer installed in the treatment box, the neutralizer is used to neutralize the pH value of the wastewater, a filter is installed in the treatment box, an air bag is slidably provided in the treatment box, and a pressure block is fixed in the treatment box.

[0007] A discharge nozzle is connected to the lower part of the storage cylinder, a first air inlet pipe is connected to the upper part of the storage cylinder, a first solenoid valve is installed on the first air inlet pipe, and a first hose is connected between the airbag and the first air inlet pipe.

[0008] Furthermore, the wastewater treatment device also includes an air supply component.

[0009] The air supply assembly comprises an air pump, which is connected to an air pump pipe, the air pump pipe is communicated with the interior of the storage tube, and a second solenoid valve is installed on the air pump pipe.

[0010] Furthermore, a stirring head is slidably provided in the processing box, a declogging component is provided above the filter screen, and a control component for controlling the movement of the stirring head and the declogging component is fixed to one side of the processing box.

[0011] Furthermore, vertical slide rails are provided on both inner walls of the processing box, and sliders are fixed on both sides of the airbag, and the two sliders are respectively located in the two slide rails for sliding.

[0012] Furthermore, support bars are fixed to the inner walls on both sides of the processing box, the support bars are located above the pressing blocks, and the filter screen is supported above the support bars.

[0013] Furthermore, a support block is fixed on one side of the pressing block, the support block is located directly above one of the sliders, and a distance sensor for detecting the height of the slider is fixed below the support block, and the distance sensor is electrically connected to a preset control system.

[0014] Furthermore, the airbag is connected to an air pump, the air pump is connected to an air intake pipe, and a third solenoid valve is installed on the air intake pipe.

[0015] Furthermore, the control component includes a first L-shaped bracket fixed on one side of the processing box, a cylinder is fixed on the vertical plate of the L-shaped bracket, the output shaft of the cylinder passes through the vertical plate of the first L-shaped bracket and a sliding shaft is fixed thereon, and the sliding shaft passes through the corresponding side wall of the processing box and is fixed on the stirring head.

[0016] An L-shaped connecting rod is fixed above the output shaft of the cylinder, a vertical telescopic rod is fixed below the cross bar of the L-shaped connecting rod, and the output shaft of the telescopic rod is fixed on the unblocking assembly.

[0017] Furthermore, the blockage-clearing component is a horizontal strip brush;

[0018] Both sides of the filter screen are provided with U-shaped depressions.

[0019] A wastewater treatment method for a heat exchanger is applied to the wastewater treatment device, and the wastewater treatment method is as follows:

[0020] Open the second solenoid valve, start the vacuum pump, control the storage cylinder to absorb the neutralizer, then close the second solenoid valve, open the third solenoid valve, start the air pump to fill the air bag with gas, and make the air pressure of the air bag the same as that of the outside, then close the third solenoid valve, and open the first solenoid valve;

[0021] Wastewater to be treated is injected from the top of the treatment box, and impurities in the wastewater are filtered through the filter. As the water level in the treatment box gradually rises, the airbag floats up, and the water level in the treatment box is judged by the data detected by the distance sensor. When the airbag contacts the pressing block, the neutralizer in the storage cylinder is pressed out as the water level rises. When the data detected by the distance sensor reaches the preset value, the first solenoid valve is closed, and the wastewater in the treatment box is stirred by starting the cylinder. At the same time, the strip brush sweeps the impurities accumulated on the filter into the depression. After neutralization, the water outlet of the treatment box is opened, and the water in it is input into the heat exchanger for heating.

[0022] The wastewater treatment device for heat exchanger and the treatment method thereof proposed by the present invention can bring the following beneficial effects:

[0023] 1. The wastewater treatment device of the present invention is provided with an airbag and a distance sensor, which can not only judge the floating height of the airbag through the distance sensor, thereby judging the water level in the treatment box, and realizing automatic control of water injection, but also can squeeze the air in the airbag in response to the rising water level after the airbag contacts the pressing block, squeeze the neutralizer in the storage cylinder into the treatment box, and realize automatic addition of the neutralizer, and can also judge the compression degree of the airbag through the data detected by the distance sensor, thereby judging the amount of neutralizer added;

[0024] 2. The wastewater treatment device of the present invention stirs the wastewater in the treatment box by starting the cylinder, so that the neutralizer is evenly distributed. At the same time, the strip brush is located above the filter screen and reciprocates to sweep the impurities accumulated on it into the depression, so as to clear the blockage of the filter screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0026] Figure 1 This is a schematic diagram of the cross-sectional structure of a wastewater treatment device for a heat exchanger according to the present invention, shown from a first perspective.

[0027] Figure 2 for Figure 1 Enlarged structural diagram at A in the middle.

[0028] Figure 3 This is a schematic cross-sectional structure diagram of a wastewater treatment device for a heat exchanger according to the present invention from a second viewing angle. DETAILED DESCRIPTION

[0029] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in an exemplary manner in conjunction with the accompanying drawings.

[0030] In the description of the present invention, it is necessary to understand that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0032] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the present invention, unless otherwise clearly specified and limited, the first feature "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one scheme", "some schemes", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the scheme or example are included in at least one scheme or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same scheme or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more schemes or examples.

[0034] The embodiment of the present invention provides a wastewater treatment device for a heat exchanger, the wastewater treatment device comprising a treatment box 1, such as Figure 1As shown, a storage cylinder 2 for storing a neutralizer is installed in the treatment box 1, and the neutralizer is used to neutralize the pH value of the wastewater. The wastewater treatment device also includes an air supply component 3, an air bag 4 is slidably provided in the treatment box 1, a filter screen 5 is installed in the treatment box 1, a stirring head 6 is slidably provided in the treatment box 1, a deblocking component 7 is provided above the filter screen 5, and a control component 8 for controlling the movement of the stirring head 6 and the deblocking component 7 is fixed to one side of the treatment box 1.

[0035] A water inlet is provided on the top of the processing box 1, and a water outlet is connected to the bottom. Vertical slide rails 11 are provided on the inner walls on both sides of the processing box 1. A pressure block 13 is fixed in the processing box 1. Support bars 12 are fixed on the inner walls on both sides of the processing box 1. The support bars 12 are located above the pressure block 13. The filter screen 5 is supported above the support bar 12, and a support block 14 is fixed on one side of the pressure block 13.

[0036] A discharge nozzle 21 is provided below the storage cylinder 2. Figure 2 As shown, a first air intake pipe 22 is connected to the upper part, and a first solenoid valve 23 is installed on the first air intake pipe 22.

[0037] Sliders 41 are fixed on both sides of the airbag 4. The two sliders 41 are respectively located in two slide rails 11 for sliding. A first hose 42 is provided between the airbag 4 and the first air inlet pipe 22. The support block 14 is located directly above one of the slides 41. A distance sensor 15 for detecting the height of the slide 41 is fixed below the support block 14. The distance sensor 15 is electrically connected to a preset control system.

[0038] The air supply assembly 3 includes an air pump 31 , to which an air pump pipe 32 is connected. The air pump pipe 32 is communicated with the interior of the storage tube 2 , and a second solenoid valve 33 is installed on the air pump pipe 32 .

[0039] The airbag 4 is also connected to an air pump 42 , the air pump 42 is connected to an air intake pipe 43 , a third solenoid valve 44 is installed on the air intake pipe 43 , and the air intake pipe 43 is connected to the airbag 4 via a second hose 45 .

[0040] The control assembly 8 includes a first L-shaped bracket 81 fixed to one side of the processing box 1. Figure 3 As shown, a cylinder 82 is fixed on the vertical plate of the L-shaped bracket 81 , and the output shaft of the cylinder 82 passes through the vertical plate of the first L-shaped bracket 81 and is fixed with a sliding shaft 83 , which passes through the corresponding side wall of the processing box 1 and is fixed on the stirring head 6 .

[0041] An L-shaped connecting rod 84 is fixed above the output shaft of the cylinder 82 , a vertical telescopic rod 85 is fixed below the cross bar of the L-shaped connecting rod 84 , and the output shaft of the telescopic rod 85 is fixed on the unblocking assembly 7 .

[0042] The unblocking component 7 is a horizontal strip brush. Under the natural state of gravity, the bristles on the strip brush contact the upper side of the filter screen 5.

[0043] Both sides of the filter screen 5 are provided with U-shaped depressions.

[0044] A wastewater treatment method for a heat exchanger is applied to the above-mentioned wastewater treatment device. The wastewater treatment method is as follows:

[0045] Open the second solenoid valve 33 and start the vacuum pump 31 to control the storage tube 2 to absorb the neutralizer. Then close the second solenoid valve 33, open the third solenoid valve 44, start the air pump 42 to fill the airbag 4 with gas, and make the air pressure of the airbag 4 the same as that of the outside. Then close the third solenoid valve 44 and open the first solenoid valve 23.

[0046] Wastewater to be treated is injected from the top of the treatment box 1, and impurities in the wastewater are filtered through the filter 5. As the water level in the treatment box 1 gradually rises, the airbag 4 floats up, and the water level in the treatment box 1 is judged by the data detected by the distance sensor 15. When the airbag 4 contacts the pressing block 13, as the water level rises, the airbag 4 is compressed, and the gas therein is pressed into the storage tube 2, and the neutralizer therein is pressed out, thereby realizing the automatic addition of the neutralizer. When the data detected by the distance sensor 15 reaches the preset value, the first solenoid valve 23 is closed, and the wastewater in the treatment box 1 is stirred by starting the cylinder 82 to make the neutralizer evenly distributed. At the same time, the strip brush is located above the filter 5 and reciprocates to sweep the impurities accumulated thereon into the depression, thereby unblocking the filter 5. After the neutralization is completed, the water outlet of the treatment box 1 is opened, and the water therein is input into the heat exchanger for heating.

[0047] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0048] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A wastewater treatment device for a heat exchanger, the wastewater treatment device comprising a treatment tank (1), characterized in that: The treatment box (1) is provided with a storage cylinder (2) for storing a neutralizing agent, the neutralizing agent is used to neutralize the pH value of the wastewater, a filter screen (5) is provided in the treatment box (1), an air bag (4) is slidably provided in the treatment box (1), and a pressing block (13) is fixed in the treatment box (1); A discharge nozzle (21) is provided below the storage cylinder (2), a first air inlet pipe (22) is provided above the storage cylinder (2), a first solenoid valve (23) is installed on the first air inlet pipe (22), and a first hose (42) is provided between the air bag (4) and the first air inlet pipe (22).

2. A wastewater treatment device for a heat exchanger according to claim 1, characterized in that: The wastewater treatment device also includes an air supply component (3); The air supply assembly (3) comprises an air pump (31), the air pump (31) is connected to an air pump pipe (32), the air pump pipe (32) is communicated with the interior of the storage cylinder (2), and a second electromagnetic valve (33) is installed on the air pump pipe (32).

3. A wastewater treatment device for a heat exchanger according to claim 2, characterized in that: A stirring head (6) is slidably provided in the processing box (1), a declogging assembly (7) is provided above the filter screen (5), and a control assembly (8) for controlling the movement of the stirring head (6) and the declogging assembly (7) is fixed on one side of the processing box (1).

4. A wastewater treatment device for a heat exchanger according to claim 3, characterized in that: Vertical slide rails (11) are provided on the inner walls of both sides of the processing box (1), and sliders (41) are fixed on both sides of the airbag (4), and the two sliders (41) are respectively located in the two slide rails (11) and slide.

5. A wastewater treatment device for a heat exchanger according to claim 4, characterized in that: Support bars (12) are fixed to the inner walls on both sides of the processing box (1), the support bars (12) are located above the pressing block (13), and the filter screen (5) is supported above the support bars (12).

6. A wastewater treatment device for a heat exchanger according to claim 5, characterized in that: A support block (14) is fixed on one side of the pressing block (13), the support block (14) is located directly above one of the sliders (41), and a distance sensor (15) for detecting the height of the slider (41) is fixed below the support block (14), the distance sensor (15) being electrically connected to a preset control system.

7. A wastewater treatment device for a heat exchanger according to claim 6, characterized in that: The air bag (4) is also connected to an air pump (42), the air pump (42) is connected to an air intake pipe (43), and a third solenoid valve (44) is installed on the air intake pipe (43).

8. A wastewater treatment device for a heat exchanger according to claim 7, characterized in that: The control assembly (8) comprises a first L-shaped bracket (81) fixed on one side of the processing box (1); a cylinder (82) is fixed on the vertical plate of the L-shaped bracket (81); an output shaft of the cylinder (82) passes through the vertical plate of the first L-shaped bracket (81) and is fixed with a sliding shaft (83); the sliding shaft (83) passes through the corresponding side wall of the processing box (1) and is fixed on the stirring head (6); An L-shaped connecting rod (84) is fixed above the output shaft of the cylinder (82), a vertical telescopic rod (85) is fixed below the crossbar of the L-shaped connecting rod (84), and the output shaft of the telescopic rod (85) is fixed on the unblocking assembly (7).

9. A wastewater treatment device for a heat exchanger according to claim 8, characterized in that: The blockage clearing component (7) is a horizontal strip brush; Both sides of the filter screen (5) are provided with U-shaped depressions.

10. A wastewater treatment method for a heat exchanger, applied to the wastewater treatment device according to claim 9, characterized in that: The wastewater treatment method is as follows: The second electromagnetic valve (33) is opened, the vacuum pump (31) is started, and the storage cylinder (2) is controlled to absorb the neutralizing agent, and then the second electromagnetic valve (33) is closed, the third electromagnetic valve (44) is opened, and the air pump (42) is started to fill the air bag (4) with gas, and the air pressure of the air bag (4) is made the same as that of the outside, and then the third electromagnetic valve (44) is closed, and the first electromagnetic valve (23) is opened; Wastewater to be treated is injected from the top of the treatment box (1), and impurities in the wastewater are filtered through the filter screen (5). As the water level in the treatment box (1) gradually rises, the air bag (4) floats up, and the water level in the treatment box (1) is judged by the data detected by the distance sensor (15). When the air bag (4) contacts the pressing block (13), as the water level rises, the neutralizer in the storage cylinder (2) is pressed out. When the data detected by the distance sensor (15) reaches a preset value, the first solenoid valve (23) is closed, and the wastewater in the treatment box (1) is stirred by starting the cylinder (82). At the same time, the strip brush sweeps the impurities accumulated on the filter screen (5) into the depression. After the neutralization is completed, the water outlet of the treatment box (1) is opened, and the water in the treatment box is input into the heat exchanger for heating.

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