Turbid circulating water treatment system suitable for steel slag production line

Abstract

The utility model belongs to the technical field of steel slag treatment, and particularly relates to a turbid circulating water treatment system suitable for a steel slag production line, which mainly comprises a hot stewing tank, wet dust removal equipment, mud-water separation equipment, mud treatment equipment, clear water recycling equipment and a settling pond, the sedimentation tank comprises a sedimentation tank water inlet and a sedimentation tank water outlet, the sedimentation tank water inlet is connected with the hot stewing tank, and the sedimentation tank water outlet is connected with the mud-water separation equipment. According to the turbid circulating water treatment system suitable for the steel slag production line, the sedimentation tank is introduced into the turbid circulating water treatment system and is connected between the heat stewing tank and the mud-water separation equipment, so that high-turbidity and high-temperature return water discharged from the heat stewing tank is firstly settled and cooled through the sedimentation tank, the turbidity and the temperature are reduced, and then the return water enters the mud-water separation equipment; the quality of the return water before entering the mud-water separation equipment is improved, so that the effect of protecting the mud-water separation equipment is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of steel slag treatment, and in particular relates to a turbid circulating water treatment system suitable for a steel slag production line. Background Art

[0002] Steel slag is a by-product of the steelmaking process, and its output accounts for about 10% of the steel output. At present, the main method for treating steel slag is to use the hot-pressed stewing process. The hot-pressed stewing process is mainly divided into two steps: roller crushing and hot stewing. The hot-pressed stewing process is equipped with a wet dust removal device to purify the dust-containing steam generated by the roller crushing and hot stewing links and discharge it into the atmosphere. A certain amount of wastewater is generated in both the hot stewing and wet dust removal equipment. The wastewater has a high temperature, a large content of suspended matter, and an alkaline pH, and cannot be directly recycled. Therefore, a supporting wastewater treatment system is required to efficiently treat the wastewater generated in the steel slag treatment process, realize wastewater recycling and reduce environmental pollution. For example, a steel slag production line supporting turbid water treatment system (publication number CN116081895A) and a steel slag hot stew supporting turbid water process system (publication number CN116102215A) designed by our company are both wastewater treatment systems that efficiently treat wastewater. However, due to the high turbidity of the return water from the hot stewing tank (the particle size of the steel slag particles is relatively large) and high temperature, if it directly enters the subsequent mud and water separation equipment (such as integrated pressure chemical purification equipment, inclined plate sedimentation tank, etc. for mud and water separation), it is easy to cause scaling inside the mud and water separation equipment, poor operation and easy damage. Summary of the invention

[0003] The present application provides a turbid circulating water treatment system suitable for a steel slag production line, which is used to solve the problems of internal scaling, poor operation and easy damage of mud-water separation equipment in the prior art.

[0004] The present application provides a turbid circulating water treatment system suitable for a steel slag production line, which is mainly composed of a hot stewing tank, a wet dust removal device, a mud-water separation device, a mud treatment device, and a clean water recycling device, and is characterized in that it also includes:

[0005] A sedimentation tank, wherein the sedimentation tank comprises a sedimentation tank water inlet and a sedimentation tank water outlet, wherein the sedimentation tank water inlet is connected to the hot stewing tank, and the sedimentation tank water outlet is connected to the mud-water separation equipment.

[0006] The above-mentioned turbid circulating water treatment system suitable for steel slag production lines introduces a sedimentation tank into the turbid circulating water treatment system, and connects the sedimentation tank between the hot stewing tank and the mud-water separation equipment. The high turbidity and high temperature return water from the hot stewing tank will first be precipitated and cooled in the sedimentation tank to reduce the turbidity and temperature, and then enter the mud-water separation equipment, thereby improving the quality of the return water before entering the mud-water separation equipment, thereby playing a role in protecting the mud-water separation equipment.

[0007] A sedimentation tank, wherein the sedimentation tank comprises a sedimentation tank water inlet and a sedimentation tank water outlet, wherein the sedimentation tank water inlet is connected to the hot stewing tank, and the sedimentation tank water outlet is connected to the mud-water separation equipment.

[0008] In the technical solution of one embodiment, the sedimentation tank further includes a sedimentation tank sewage outlet, and the sedimentation tank sewage outlet is connected to the mud treatment equipment.

[0009] In the technical solution of one embodiment, the sedimentation tank is a horizontal flow sedimentation tank.

[0010] In the technical solution of one embodiment, the sedimentation tank is a radial flow sedimentation tank.

[0011] In the technical solution of one embodiment, the turbid water treatment system also includes a coarse particle separator, which has a separator water inlet and a separator water outlet, the separator water inlet is connected to the wet dust removal equipment, and the separator water outlet is connected to the mud and water separation equipment.

[0012] In the technical solution of one embodiment, the turbid circulating water treatment system also includes a second wastewater collection well, the inlet of the second wastewater collection well is connected to the wastewater outlet of the wet dust removal equipment, and the outlet of the second wastewater collection well is connected to the water inlet of the separator.

[0013] In the technical solution of one embodiment, the filtrate outlet of the mud treatment equipment is connected to the sedimentation tank water inlet of the sedimentation tank.

[0014] In the technical solution of one embodiment, the mud-water separation equipment is an inclined plate sedimentation tank or an integrated pressure-bearing chemical purification equipment.

[0015] In the technical solution of one embodiment, the turbid water treatment system also includes a first wastewater collection well, the inlet of the first wastewater collection well is connected to the wastewater outlet of the hot stewing tank, and the outlet of the first wastewater collection well is connected to the sedimentation tank inlet of the sedimentation tank.

[0016] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings in this application are used to illustrate preferred embodiments, so as to facilitate a person skilled in the art to clearly understand various other advantages and benefits, and should not be considered as limiting this application. In addition, the same reference numerals are used to represent the same components in all the drawings.

[0018] Figure 1 This is a schematic diagram of a turbid circulating water treatment system suitable for a steel slag production line in one embodiment of the present application.

[0019] Figure 2 This is a schematic diagram of a turbid circulating water treatment system suitable for a steel slag production line in one embodiment of the present application.

[0020] Figure 3 This is a schematic diagram of a turbid circulating water treatment system suitable for a steel slag production line in one embodiment of the present application.

[0021] Description of Figure Numbers:

[0022] 1. Hot stewing tank; 2. Wet dust removal equipment; 3. Mud and water separation equipment; 4. Mud treatment equipment; 5. First wastewater collection well; 6. Second wastewater collection well; 7. Clean water reuse equipment; 8. Sedimentation tank; 9. Coarse particle separator;

[0023] 31. Inclined plate sedimentation tank; 32. Integrated pressure-bearing chemical purification equipment;

[0024] 71. Dosing device;

[0025] 81. Horizontal flow sedimentation tank; 82. Radial flow sedimentation tank. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0027] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0028] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two (including two), unless otherwise clearly and specifically defined.

[0029] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application 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 embodiments of the present application.

[0030] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "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 or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0031] See also Figure 1 As shown, an embodiment of the present application provides a turbid circulating water treatment system suitable for a steel slag production line, the turbid circulating water treatment system consists of a hot stewing tank 1, a wet dust removal device 2, a mud-water separation device 3, a mud treatment device 4, and a clean water recycling device 7. The main function of the turbid circulating water treatment system is to efficiently treat the wastewater generated in the steel slag treatment process, realize wastewater recycling and reduce pollution to the environment.

[0032] In order to protect the mud-water separation equipment 3 and prevent it from being damaged, we also added a sedimentation tank 8 to the turbid water treatment system. The sedimentation tank 8 has a tank body, which is provided with a sedimentation tank water inlet and a sedimentation tank water outlet. The sedimentation tank water inlet is connected to the hot stewing tank 1 through a pipeline, a canal, etc., and the sedimentation tank water outlet is connected to the mud-water separation equipment 3 through a pipeline, a canal, etc. When in use, the high turbidity and high temperature return water with large-sized steel slag particles flowing out of the hot stewing tank 1 first enters the sedimentation tank through the sedimentation tank water inlet. The high turbidity with large-sized steel slag particles will precipitate in the sedimentation tank. At the same time, the open area and slow flow rate of the sedimentation tank 8 are used to cool the return water. The turbidity and temperature of the return water after passing through the sedimentation tank 8 are lowered. Then, it enters the mud-water separation equipment, which can reduce the scaling of the return water inside the mud-water separation equipment 3 and improve the running smoothness, thereby playing a role in protecting the mud-water separation equipment 3.

[0033] Specifically, the mud-water separation equipment 3 may be an inclined plate sedimentation tank 31 or an integrated pressure-bearing chemical purification equipment 32 .

[0034] Specific to Figure 2In the illustrated embodiment, the mud-water separation device 3 is an inclined plate sedimentation tank 31, and the sedimentation tank 8 can be a horizontal flow sedimentation tank 81, and the horizontal flow sedimentation tank 81 is used to pre-treat the return water of the hot stewing tank 1. The horizontal flow sedimentation tank 81 is a rectangular pool, and the sewage generated by the hot stewing tank 1 is introduced into the pool. The water flow rate is very slow, which is approximately equal to being stationary. The suspended matter and particulate matter in the sewage are continuously precipitated under the action of gravity, and the clear water after precipitation enters the inclined plate sedimentation tank 31. In addition, the return water temperature of the hot stewing tank 8 is generally above 70°C. Through a certain residence time in the horizontal flow sedimentation tank 81, the heat in the hot stewing return water can be exchanged with the air, which plays a certain cooling effect.

[0035] Specific to Figure 3 In the illustrated embodiment, the mud-water separation equipment 3 is an integrated pressure-bearing chemical purification equipment 32, and the sedimentation tank 8 can adopt a radial flow sedimentation tank 82, and the radial flow sedimentation tank 82 is used to pre-treat the return water of the hot stewing tank 1. The radial flow sedimentation tank 82 is a sewage treatment equipment based on the principle of physical precipitation. The principle is to guide the water flow to form a radial dispersion and reduce the speed, so that the suspended matter is precipitated. The radial flow sedimentation tank 82 precipitates and separates the steel slag, suspended matter, etc. in the steel slag hot stewing wastewater, which can reduce the wear and scaling problems of the steel slag particles on the subsequent integrated pressure-bearing chemical purification equipment 32. In addition, the return water temperature of the hot stewing tank 8 is generally above 70°C. Through a certain residence time in the radial flow sedimentation tank 82, the heat in the hot stewing return water can be heat exchanged with the air, which plays a certain cooling effect.

[0036] See also Figure 1 In some embodiments, the sedimentation tank 8 further includes a sedimentation tank drain port, which is connected to a pipeline water pump of the mud treatment equipment 4. The sludge settled at the bottom of the sedimentation tank 8 accumulates continuously and needs to be cleaned, so it is discharged to the mud treatment equipment 4 through a pipeline water pump for centralized treatment.

[0037] See also Figure 1 In some embodiments, the filtrate outlet of the mud treatment device 4 is connected to the sedimentation tank inlet of the sedimentation tank 8. The mud treatment device 4 receives the sludge discharged from the mud-water separation device 3 and the sedimentation tank 8, and the mud cake produced after the treatment is transported out for subsequent treatment, and the filtrate is returned to the sedimentation tank 8 through the pipeline for recycling.

[0038] See also Figure 1In some embodiments, the turbid water treatment system further includes a coarse particle separator 9, which has a separator water inlet and a separator water outlet, the separator water inlet is connected to the wet dust removal equipment 2 through a pipeline, and the separator water outlet is connected to the mud and water separation equipment 3 through a pipeline. The coarse particle separator 9 can be used to pre-treat the return water of the wet dust removal equipment 2, and can remove coarse particle impurities with a particle size of ≥60μm in the dust removal wastewater, which can reduce the wear of the mud and water separation equipment 3 and the load of the subsequent water treatment equipment, and ensure the continuous and smooth operation of the water treatment system.

[0039] Specifically, in some embodiments, the integrated pressure chemical purification device 32 is used to directly and efficiently filter the wastewater treated by the coarse particle separator 9 and the radial flow sedimentation tank 82. The integrated pressure chemical purification device 32 sends the filtered filtrate to the clean water recycling device 7 through the outlet pipe, and the filtered mud is discharged into the mud treatment device 4.

[0040] See also Figure 1 In some embodiments, the turbid water treatment system further includes a first wastewater collection well 5, the inlet of the first wastewater collection well 5 is connected to the wastewater outlet of the hot stew tank 1, and the outlet of the first wastewater collection well 5 is connected to the sedimentation tank inlet of the sedimentation tank 8. The return water of the hot stew tank 1 first flows into the first wastewater collection well 5 for buffering, and then is lifted into the sedimentation tank 8 by the lifting pump.

[0041] See also Figure 1 In some embodiments, the turbid circulating water treatment system further includes a second wastewater collection well 6, the inlet of the second wastewater collection well 6 is connected to the wastewater outlet of the wet dust removal device 2, and the outlet of the second wastewater collection well 6 is connected to the water inlet of the separator. The return water of the wet dust removal device 2 first flows into the second wastewater collection well 6 for buffering, and then is lifted by the lifting pump to enter the mud-water separation device 3 (coarse particle separator 9).

[0042] See also Figure 1 In some embodiments, the clean water reuse equipment 7 also includes a dosing device 71. Since the pipeline system and related equipment are prone to scaling, a dosing device 71 is provided in the system to regularly add sodium bicarbonate (NaHCO3) to precipitate Ca2+ and Mg2+ in the system to reduce scaling of the system.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no contradiction or conflict, the various technical features mentioned in the embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A turbid circulating water treatment system suitable for a steel slag production line, mainly comprising a hot stewing tank (1), a wet dust removal device (2), a mud-water separation device (3), a mud treatment device (4), and a clean water recycling device (7), characterized in that: Also includes: A sedimentation tank (8), wherein the sedimentation tank (8) comprises a sedimentation tank water inlet and a sedimentation tank water outlet, wherein the sedimentation tank water inlet is connected to the hot stewing tank (1), and the sedimentation tank water outlet is connected to the mud-water separation equipment (3).

2. The turbid water treatment system according to claim 1, characterized in that: The sedimentation tank (8) also includes a sedimentation tank sewage outlet, and the sedimentation tank sewage outlet is connected to the mud processing equipment (4).

3. The turbid water treatment system according to claim 2, characterized in that: The sedimentation tank (8) is a horizontal flow sedimentation tank (81).

4. The turbid water treatment system according to claim 2, characterized in that: The sedimentation tank (8) is a radial flow sedimentation tank (82).

5. The turbid water treatment system according to claim 1, characterized in that: The turbid circulating water treatment system also includes a coarse particle separator (9), the coarse particle separator (9) having a separator water inlet and a separator water outlet, the separator water inlet is connected to the wet dust removal equipment (2), and the separator water outlet is connected to the mud-water separation equipment (3).

6. The turbid water treatment system according to claim 5, characterized in that: The turbid circulating water treatment system also includes a second wastewater collection well (6), the inlet of the second wastewater collection well (6) is connected to the wastewater outlet of the wet dust removal equipment (2), and the outlet of the second wastewater collection well (6) is connected to the water inlet of the separator.

7. The turbid water treatment system according to claim 1, characterized in that: The filtrate outlet of the mud treatment equipment (4) is connected to the sedimentation tank water inlet of the sedimentation tank (8).

8. The turbid water treatment system according to claim 1, characterized in that: The mud-water separation equipment (3) is an inclined plate sedimentation tank (31) or an integrated pressure-bearing chemical purification equipment (32).

9. The turbid water treatment system according to claim 1, characterized in that: The turbid circulating water treatment system also includes a first wastewater collection well (5), the inlet of the first wastewater collection well (5) is connected to the wastewater outlet of the hot stewing tank (1), and the outlet of the first wastewater collection well (5) is connected to the sedimentation tank inlet of the sedimentation tank (8).

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