Slag treatment system

Abstract

The invention provides a slag treatment system. The slag treatment system comprises a sand fishing device, a silt separation device and a sewage treatment device. The sediment fishing device is used for receiving sediment water flowing out of the slag table and separating the sediment water, the sediment separation device comprises at least two units, the two units are defined as the first unit and the second unit respectively, and the first unit is used for receiving supernate separated by the sediment separation device and carrying out precipitation to further separate the supernate; supernate overflowing after separation in the first unit flows into the second unit through a communicating device, and the separated supernate is further precipitated and overflows so as to be conveyed to a sewage treatment device; sediment outlets are formed in the bottoms of the first unit and the second unit to discharge sediment; and the sewage treatment device is used for receiving the supernatant separated by the silt separation device and carrying out precipitation and pressing separation to separate out mud and clear water. The waste metal recovery rate can be increased, and safety, energy conservation and environment protection are achieved.

Description

Technical Field

[0001] The present application relates to the technical field of slag treatment, and in particular to a slag treatment system. Background Art

[0002] With the vigorous development of waste incineration power generation enterprises in the past 10 years, the slag treatment industry, as its supporting treatment enterprise, has taken root and grown in various parts of the country. At the same time, the current environmental protection rate of slag treatment production and the purification rate of environmentally friendly materials are not high. Summary of the invention

[0003] An embodiment of the present application provides a sediment separation device, comprising an outer separator and an inner separator, wherein the outer separator defines a first accommodating space; the inner separator is accommodated in the first accommodating space and defines a second accommodating space; a partition space is formed between the outer wall of the second accommodating space and the inner wall of the first accommodating space, and a connecting opening is provided at the bottom of the inner separator to connect the second accommodating space with the partition space, so that the sediment water entering the inner separator enters the partition space from the connecting opening, and the supernatant of the sediment water overflows from the top of the outer separator.

[0004] In some embodiments, a first opening is provided on the top of the outer separator, and the supernatant of the sediment water overflows from the first opening; a second opening is provided on the top of the inner separator for receiving the sediment water.

[0005] In some embodiments, the sediment separation device further includes a bracket, which spans across the first opening and is mounted on the top of the outer separator; the top of the inner separator is connected to the bracket to suspend the inner separator in the first accommodating space.

[0006] In some embodiments, a baffle is disposed around the top of the inner separator, and the top of the baffle is higher than the top of the outer separator.

[0007] In some embodiments, the outer separator and the inner separator are both cone-shaped.

[0008] In some embodiments, the outer separator and the inner separator arranged in the outer separator form a unit, and the mud and sand separation device includes at least two units; the two units are defined as a first unit and a second unit; a connecting device is provided between the outer separator of the first unit and the inner separator of the second unit, so that the supernatant overflowing from the outer separator of the first unit flows into the inner separator of the second unit through the connecting device for re-separation.

[0009] In some embodiments, the sediment separation device further includes a first baffle and a second baffle, the first baffle being arranged around the top of the outer separators of the first unit and the second unit, wherein the first baffle is provided with a first notch at positions corresponding to the first unit and the second unit, respectively, so that the supernatant overflows from the first notch to the outside of the outer separators of the corresponding units; the second baffle is arranged around the top of the inner separators of the first unit and the second unit, wherein the second baffle is provided with a second notch at least at a position corresponding to the second unit; the two ends of the connecting device are respectively connected to the outer separator of the first unit and the inner separator of the second unit, and correspond to the first notch of the first unit and the second notch of the second unit, respectively.

[0010] In some embodiments, the connecting device includes a third baffle and a bottom plate, the two ends of the bottom plate are respectively connected to the outer separator of the first unit and the inner separator of the second unit, and are respectively connected to the first notch and the second notch, and the third baffle is arranged on both sides of the bottom plate to drain the supernatant overflowing from the first notch of the first unit to the second notch and enter the inner separator of the second unit.

[0011] In some embodiments, a water spray nozzle defoaming device is further provided in the outer separator and the inner separator to eliminate the foam generated in the first accommodating space and the second accommodating space.

[0012] An embodiment of the present application provides a slag treatment system, including a sand bailing device, the above-mentioned sediment separation device and a sewage treatment device, wherein the sand bailing device is used to receive sediment water flowing out from the slag platform and separate the sediment water; the sediment separation device is fluidly connected to the sand bailing device, and is used to receive the supernatant separated by the sand bailing device and perform sedimentation separation; the sewage treatment device is fluidly connected to the sediment separation device, and is used to perform sedimentation separation on the supernatant separated by the sediment separation device, so as to separate mud and clean water.

[0013] The present application adopts a double-layer sediment separation device and separates the sediment and the supernatant by overflow, which can fully guarantee the sedimentation time and sedimentation process of the sediment and improve the sedimentation separation effect. In this way, a large amount of sand is separated, which is convenient for subsequent separation of mud and improves the separation efficiency of the entire system.

[0014] The embodiment of the present application provides a sewage treatment device, comprising a first treatment tank and a filter press, wherein the first treatment tank comprises a bottom wall and a side wall, wherein the bottom wall and the side wall enclose a receiving space for receiving sewage to be treated, and the bottom wall is arranged inclined relative to a horizontal plane. The filter press is connected to the first treatment tank, and is used to receive sewage flowing in from the bottom wall, and press the flowing sewage to separate mud and water from the sewage.

[0015] In some embodiments, the inclination angle of the bottom wall of the first treatment tank is greater than or equal to 6°.

[0016] In some embodiments, the upper surface of the bottom wall is provided with cement, a glazed tile layer, a ceramic layer or a stainless steel layer.

[0017] In some embodiments, the bottom wall includes a first end and a second end, and the distance between the first end and the top of the side wall is smaller than the distance between the second end and the top of the side wall; the sewage treatment device also includes a sewage pump, which is arranged adjacent to the second end of the bottom wall and is used to pump sewage flowing to the second end to the filter press.

[0018] In some embodiments, a receiving tank is further included, which is adjacent to the second end of the first treatment tank and separated from the first treatment tank by the side wall, and a sewage interface is provided on the side wall; the sewage pump is arranged in the receiving tank, the water inlet of the sewage pump is connected to the first treatment tank through the sewage interface, and the water outlet of the sewage pump is connected to the filter press to transfer the sewage input from the first treatment tank to the filter press.

[0019] In some embodiments, a second treatment tank is further included, which is spaced apart from the first treatment tank. The water inlet of the second treatment tank is connected to the water outlet of the filter press to collect water separated from the filter press.

[0020] In some embodiments, a storage space is provided below the filter press for storing the mud cake formed after pressing; a collecting tank is provided below the filter press for collecting seepage water generated during the pressing process and the mud discharge process; the collecting tank is connected to the first treatment tank to return the seepage water to the first treatment tank for circulation and separation.

[0021] In some embodiments, the sewage treatment device further comprises a cover plate, wherein the cover plate is disposed on the first treatment tank to seal the first treatment tank; and a water inlet is disposed on the cover plate.

[0022] In some embodiments, a clean water nozzle defoaming device is provided in the first treatment tank to eliminate the foam generated in the first treatment tank.

[0023] The embodiment of the present application provides a slag treatment system, comprising a sand bailing device, a sedimentation device and the above-mentioned sewage treatment device. The sand bailing device is used to receive the sediment water flowing out from the slag platform and separate the sediment water, the sedimentation device is fluidly connected to the sand bailing device, and is used to receive the supernatant separated by the sand bailing device and perform sedimentation separation on the supernatant, and the sewage treatment device is fluidly connected to the sedimentation device, and is used to perform sedimentation separation and pressure separation on the supernatant separated by the sedimentation device to separate mud and clean water.

[0024] By setting the bottom wall of the first treatment tank to be inclined relative to the horizontal plane, the present application can make the mud deposited on the bottom wall flow along the bottom wall, thereby improving the fluidity of the mud, so as to separate the mud from one end of the first treatment tank and improve the separation efficiency. In this way, the present application does not need to use a track pump to pump mud or use a vertical tank for sedimentation, and can directly filter the production wastewater to generate clean water for recycling production, which greatly improves the scrap metal recovery rate, purifies the purity of the tailings, and greatly reduces production energy consumption.

[0025] An embodiment of the present application provides a slag treatment system, including a sand bailing device, a sediment separation device and a sewage treatment device, wherein the sand bailing device is used to receive sediment water flowing out from the slag platform and separate the sediment water; the sediment separation device is used to receive the supernatant separated by the sand bailing device and perform sedimentation separation; the sewage treatment device is used to receive the supernatant separated by the sediment separation device and perform sedimentation and pressing separation to separate mud and clean water.

[0026] In some embodiments, the slag treatment system further includes a sediment settling device for receiving sediment water precipitated in the sediment separation device and performing sedimentation separation.

[0027] In some embodiments, the slag treatment system further includes a dehydration device for receiving concentrated sediment water separated by the sand bailing device and performing dehydration treatment.

[0028] In some embodiments, the slag treatment system further includes a cyclone fluidly connected to the sediment settling device and configured to receive sediment water precipitated in the sediment settling device for separation.

[0029] In some embodiments, the sediment separation device is also used to receive the upper sediment water separated by the cyclone and perform separation; the sewage treatment device is also used to receive the supernatant in the sediment sedimentation device and perform separation; the dehydration device is also used to receive the concentrated lower sediment liquid separated by the cyclone and perform dehydration treatment; and the sediment sedimentation tank is also used to receive the water liquid separated by the dehydration device and perform sedimentation separation.

[0030] In some embodiments, the silt separation device is arranged below the sand bailing device so that the supernatant separated by the sand bailing device can flow into the silt separation device by gravity; the sewage treatment device is arranged below the silt separation device so that the supernatant separated by the silt separation device can flow into the sewage treatment device by gravity.

[0031] In some embodiments, the sewage treatment device includes a first treatment tank and a filter press, the first treatment tank includes a bottom wall and a side wall, the bottom wall and the side wall form a containing space for accommodating the supernatant separated from the silt separation device, and the bottom wall is inclined relative to the horizontal plane; the filter press is connected to the first treatment tank, for receiving the sewage flowing in from the bottom wall, and pressing the inflowing sewage to separate the mud and water from the sewage.

[0032] In some embodiments, the sewage treatment device also includes a second treatment tank, which is spaced apart from the first treatment tank, and the water inlet of the second treatment tank is connected to the water outlet of the filter press to collect the clean water separated from the filter press; the second treatment tank is arranged under the ground outside the machine platform of the filter press, and the clean water separated by the filter press flows into the second treatment tank by gravity.

[0033] In some embodiments, the mud and sand separation device includes an outer separator and an inner separator, the outer separator defines a first accommodating space; the inner separator is accommodated in the first accommodating space and defines a second accommodating space; a partition space is formed between the outer wall of the second accommodating space and the inner wall of the first accommodating space, and a connecting opening is provided at the bottom of the inner separator to connect the second accommodating space with the partition space, so that the supernatant separated from the sand bailing device that enters the inner separator enters the partition space from the connecting opening, and the supernatant separated from the sand bailing device is allowed to overflow from the top of the outer separator after sedimentation.

[0034] In some embodiments, the outer separator and the inner separator arranged in the outer separator form a unit, and the mud and sand separation device includes at least two units; the two units are defined as a first unit and a second unit; a connecting device is provided between the outer separator of the first unit and the inner separator of the second unit, so that the supernatant overflowing from the outer separator of the first unit flows into the inner separator of the second unit through the connecting device for re-separation.

[0035] The present application can greatly improve the scrap metal recovery rate, purify the purity of tailings, enhance the visual effect of the plant area, and greatly reduce production energy consumption through the above-mentioned slag treatment system and treatment method, and is safer, more energy-saving and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0037] Figure 1 is a schematic diagram of a slag treatment system according to an embodiment of the present application;

[0038] Figure 2 is a schematic diagram of the cross-sectional structure of the sediment separation device in an embodiment of the present application;

[0039] Figure 3 is a schematic diagram of a top view of the structure of a sediment separation device in an embodiment of the present application;

[0040] Figure 4 is a schematic diagram of a top view of the structure of a sediment separation device in an embodiment of the present application;

[0041] Figure 5 is a schematic diagram of the cross-sectional structure of the sediment separation device in an embodiment of the present application;

[0042] Figure 6 is a schematic diagram of the three-dimensional structure of the sediment separation device of an embodiment of the present application;

[0043] Figure 7 It is a schematic diagram of a top view of the structure of the first treatment tank and the second treatment tank in the sewage treatment device of an embodiment of the present application;

[0044] Figure 8 It is a structural schematic diagram of a sewage treatment device according to an embodiment of the present application;

[0045] Fig. 9 It is a schematic flow chart of the slag treatment method according to an embodiment of the present application. DETAILED DESCRIPTION

[0046] The present application is further described in detail below in conjunction with the accompanying drawings and examples. It is particularly noted that the following examples are only used to illustrate the present application, but are not intended to limit the scope of the present application. Similarly, the following examples are only some embodiments of the present application rather than all embodiments, and all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of the present application.

[0047] 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.

[0048] Production circulating wastewater treatment, as the core part of the slag treatment process, has undergone five generations of process changes.

[0049] At present, the mainstream in the industry is the third generation open pool and the fourth generation tank pool. The third generation open pool has the problems of high energy consumption, corrosion of steel structure by water vapor ring, and visual unsightly foam exposure; the fourth generation tank pool has the problems of high energy consumption, difficulty in later maintenance, and hidden dangers in long-term use.

[0050] The first generation of water pools: commonly known as horse head cranes, they use a rotating crane to grab the mud and sand in the water pool for dehydration or mud pressing (which can be called "taking mud from the water and recycling the surface sewage"), so that the surface sewage in the water pool can be recycled, and it was mostly used in early open factories.

[0051] The second generation water pool: the crane-type grab crane is an update based on the first generation water pool. The mud and sand in the water pool are grabbed by the crane-type grab crane for dehydration or mud pressing (still "mud is taken from the water, and surface sewage is recycled"), so that the surface sewage in the water pool can be circulated. This set of technology was developed as the industry's requirements for operating efficiency and production scale increased.

[0052] The third generation of water pool: rail-mounted mud pump, that is, a sewage pump is hoisted by a rail crane, which runs horizontally back and forth in the water pool, pumping the mud at the bottom of the pool to the middle inclined pool, so that the surface sewage in the pool can circulate. The working efficiency is higher than that of the crane-type grab crane (it is still "taking mud from the water and recycling the surface sewage").

[0053] The fourth generation of water pool: vertical tank water pool, this water pool process uses a water pump to pump the sewage that flows to the lower part by gravity in the production process to the vertical tank at a higher place, and then uses the sedimentation principle to recycle the semi-clear and semi-muddy water into the production system ("mud in the water, semi-sewage recycled"). It is suitable for fully enclosed production plants, in order to highlight that the vertical tank can be fully enclosed to prevent water vapor from corroding the steel structure plant, and to ensure that the foam regeneration phenomenon in the open water pool before cannot be seen within the field of vision of people on the workshop floor. However, its shortcomings are also quite obvious. As time goes by, the problem of corrosion of the tank body by strong alkaline water quality has to be faced. When the tank body is repaired, the storage and destination of the water body cannot be solved. Moreover, it occupies a large area, and the one-time investment and maintenance costs are high. The most critical thing is that it has a more prominent shortcoming in terms of energy consumption, which is contrary to "green environmental protection and energy saving". (It can be called "mud in the water, semi-sewage recycled").

[0054] This application provides a slag treatment system, please refer to Figure 1 , Figure 1 Schematic diagram of the slag treatment system of the embodiment of the present application. Specifically, the slag treatment system includes but is not limited to: a sand dredging device 20, a dehydration device 30, a sediment separation device 40, a sediment sedimentation device 50, a cyclone 60 and a sewage treatment device 70.

[0055] The sand bailing device 20 can be a waterwheel-type sand bailing machine, which is used to separate the silt and water mixture output from the machine work area 10 (i.e., the slag table). The sand bailing machine can be set above the water surface, for example, 2-5 meters, 2.5-4 meters or 3-3.5 meters above the water surface, for example, 3 meters, 3.2 meters, 3.7 meters or 4 meters. The sand bailing wheel of the sand bailing machine bailes the silt from the water to the dewatering device 30, and the supernatant on the water surface of the sand bailing machine flows into the silt separation device 40. It is worth mentioning that the "supernatant" in this application refers to the liquid above the sedimented or separated silt, and the supernatant, in addition to water, still contains unprecipitated or unseparated silt. The sedimented or separated silt also contains water. For the convenience of distinguishing the description, the supernatant here is defined as the first supernatant.

[0056] The dewatering device 30 is used to receive the concentrated sediment water separated by the sand dredging device 20 and dewater the sediment water. The dewatering device 30 can be a dewatering screen, such as a vibrating screen. The sediment dewatered by the dewatering device 30 is transported to the fine sand yard for draining, and the water dewatered by the dewatering device 30 flows into the sediment sedimentation device 50.

[0057] The dry sand drained from the fine sand yard is used for brick making, and the drained sewage flows into the collection ditch 80.

[0058] The sediment separation device 40 is arranged 2-4 meters above the water surface, for example, 2.5-3.5 meters, 2.8-3.3 meters, 2.9 meters, 3 meters or 3.2 meters, etc. It is worth mentioning that the sediment separation device 40 is arranged below the sand bailing device 20, so that the first supernatant flows into the sediment separation device 40 by gravity, and the first supernatant is precipitated and separated.

[0059] After the first supernatant of the sand dredging device 20 enters the sediment separation device 40, the sediment and water in the first supernatant are separated by sedimentation, that is, the sediment in the first supernatant is precipitated in the sediment separation device 40, and the supernatant overflows from the top of the sediment separation device 40. The sediment in the sediment separation device 40 is transported to the sediment sedimentation device 50, and the supernatant separated by the sediment separation device 40 flows into the sewage treatment device 70. The supernatant overflowing from the top of the sediment separation device 40 is defined as the second supernatant in this article.

[0060] Specifically, Figure 2 and Figure 3 As shown, Figure 2 is a schematic diagram of the cross-sectional structure of the sediment separation device in the embodiment of the present application, Figure 3 1 is a schematic diagram of a top view of the structure of the sediment separation device in the embodiment of the present application. The sediment separation device 40 includes an outer separator 41 and an inner separator 42. The outer separator 41 defines a first accommodating space 410. The top of the outer separator 41 is provided with a first opening. The second supernatant separated by the sediment separation device 40 overflows through the first opening.

[0061] The inner separator 42 defines a second accommodating space 420 , and a second opening is provided on the top for receiving the first supernatant (also referred to as silt water).

[0062] The inner separator 42 is accommodated in the first accommodation space 410. The sediment separation device 41 further includes a bracket 43, which spans the first opening and is mounted on the top of the outer separator 41. The top of the inner separator 42 is connected to the bracket 43, so that the inner separator 42 is suspended in the first accommodation space 410. In some embodiments, in order to prevent the second supernatant from overflowing from the outer separator 41 to the inner separator 42, a baffle 44 can be arranged on the top of the inner separator 42, and the top of the baffle 44 is higher than the top of the outer separator 41.

[0063] A partition space 411 is formed between the outer wall of the second accommodation space 420 and the inner wall of the first accommodation space 410. A connecting opening 421 is provided at the bottom of the inner separator 42 to connect the second accommodation space 420 with the partition space 411, so that the first supernatant entering the inner separator 42 enters the partition space 411 from the connecting opening 421. Specifically, the first supernatant enters the second accommodation space 420 from the second opening, and then flows into the partition space 411 through the connecting opening 421, and the heavier sediment is deposited at the bottom of the partition space 411 (i.e., the bottom of the first accommodation space 410). As the first supernatant continues to flow from the second accommodation space 420, the water level of the second supernatant in the first accommodation space 420 and the second accommodation space 420 continues to rise, and when it rises to the top of the outer separator 41, the second supernatant overflows from the first opening at the top of the outer separator 41. By performing sedimentation separation in this way, the sedimentation time and sedimentation process of the sediment can be fully guaranteed, and the sedimentation separation effect can be improved.

[0064] The side walls of the outer separator 41 and the inner separator 42 can be arranged to be inclined with respect to the horizontal plane. On the one hand, the inclined side wall of the inner separator 42 can facilitate the first supernatant to flow along the side wall into the bottom of the second accommodating space 420, and at the same time facilitate the sedimentation of the silt in the first supernatant along the side wall; on the other hand, the inclined side wall of the outer separator 41 can facilitate the sedimentation of the second supernatant along the side wall, thereby reducing the silt suspended in the second supernatant, thereby improving the sedimentation efficiency. In some embodiments, the outer separator 41 and the inner separator 42 can both be cone-shaped, for example, they can be pyramids, such as triangular pyramids, quadrangular pyramids or pentagonal pyramids, or they can be cones or frustums. Among them, the shapes of the outer separator 41 and the inner separator 42 can be the same or different.

[0065] In some embodiments, a water nozzle defoaming device is further provided in the first accommodation space 410 and the second accommodation space 420 to eliminate the foam generated in the first accommodation space 410 and the second accommodation space 420. The water nozzle pipeline is connected by a clamp or hot-melt welding.

[0066] In some embodiments, an outer separator 41 and an inner separator 42 disposed inside the outer separator 41 form a unit, and the sediment separation device 40 includes at least two units. The present application will hereinafter introduce a sediment separation device 40 including three units connected in series.

[0067] For ease of description, the three units are defined as a first unit 401, a second unit 402 and a third unit 403, as shown in FIG. Figure 4 and Figure 5 As shown, Figure 4 is a schematic diagram of a top view of the structure of the sediment separation device in an embodiment of the present application, Figure 5 : is a schematic diagram of the cross-sectional structure of the sediment separation device in the embodiment of the present application. Among them, the outer separator 41 and the inner separator 42 of each unit can be the outer separator 41 and the inner separator 42 of any of the above-mentioned embodiments. A connecting device 45 is provided between the outer separator 41a of the first unit 401 and the inner separator 42a of the second unit 402, so that the upper second supernatant overflowing from the outer separator 41a of the first unit 401 flows into the inner separator 42b of the second unit 402 through the connecting device 45a, and the second supernatant is separated in the second unit 402, and the separated third supernatant overflows from the outer separator 41b of the second unit 402. A connecting device 45b is also provided between the outer separator 41b of the second unit 402 and the inner separator 42c of the third unit 403, so that the third supernatant overflowing from the outer separator 41b of the second unit 402 flows into the inner separator 42c of the third unit 403, the third supernatant is separated in the third unit 403, and the separated fourth supernatant overflows from the outer separator 41c of the third unit 403 (refer to Figure 5 The wastewater is discharged from the first unit 401, the second unit 402 and the third unit 403 (in the direction indicated by the arrow in the middle), and is transported to the sewage treatment device 70 through the circulation waterway 46 arranged outside the third unit 403. The bottoms of the outer separators 41a, 41b, 41c of the first unit 401, the second unit 402 and the third unit 403 are provided with sediment discharge ports, and the discharged sediment is transported to the sediment sedimentation device 50.

[0068] like Figure 6 As shown, Figure 6 : is a schematic diagram of the three-dimensional structure of the sediment separation device of the embodiment of the present application. The tops of the outer separators 41a, 41b, 41c of the first unit 401, the second unit 402 and the third unit 403 are all surrounded by a first baffle 46. The first baffle 46 is provided with a first notch so that the second supernatant, the third supernatant and the fourth supernatant overflow from the first notch to the outside of the outer separators 41a, 41b, 41c. Specifically, the number of the first notches can be multiple, for example, a first notch 47a is provided at a position corresponding to the first unit 401, a first notch 47b is provided at a position corresponding to the second unit 402, and a first notch 47c is provided at a position corresponding to the third unit 403. The second supernatant overflows from the first notch 47a corresponding to the first unit 401 to the outside of the first unit 401, the third supernatant overflows from the first notch 47b corresponding to the second unit 402 to the outside of the second unit 402, and the fourth supernatant overflows from the first notch 47c corresponding to the third unit 403 to the outside of the third unit 403.

[0069] The tops of the inner separators 42a, 42b, 42c of the first unit 401, the second unit 402, and the third unit 403 are all surrounded by a second baffle 48. The second baffle 48 is provided with a second notch, so that the second supernatant and the third supernatant flow from the second notch into the inner separators 42b, 42c of the second unit 402 and the third unit 403, respectively. Specifically, there may be multiple second notches, for example, a second notch 49b is provided at a position corresponding to the second unit 402, and a second notch 49c is also provided at a position corresponding to the third unit 403. After the second supernatant flows out from the first notch 47a of the first unit 401, it flows into the inner separator 42b of the second unit 402 from the second notch 49b corresponding to the second unit 402. After the third supernatant flows out from the first notch 47b of the second unit 402, it flows into the inner separator 42a of the third unit 403 from the second notch 49c corresponding to the third unit 403.

[0070] The two ends of a connecting device 45a are respectively connected to the outer separator 41a of the first unit 401 and the inner separator 42b of the second unit 402, and respectively correspond to the first notch 47a of the first unit 401 and the second notch 49b of the second unit 402. Specifically, the connecting device 45a includes a third baffle 452 and a bottom plate 451. For example, the two ends of the bottom plate 451 of the connecting device 45a between the first unit 401 and the second unit 402 are respectively connected to the outer separator 41a of the first unit 401 and the inner separator 42b of the second unit 402, and are respectively connected to the first notch 47a corresponding to the first unit 401 and the second notch 49b corresponding to the second unit 402. The third baffle 452 is arranged on both sides of the bottom plate 451 to drain the second supernatant overflowing from the first notch 47a corresponding to the first unit 401 to the second notch 49b corresponding to the second unit 402, and then enter the inner separator 42b of the second unit 402.

[0071] Similarly, the two ends of another connecting device 45b are respectively connected to the outer separator 41b of the second unit 402 and the inner separator 42c of the third unit 403, and respectively correspond to the first notch 47b of the second unit 402 and the second notch 49c of the third unit 403. The two ends of the bottom plate 451 of the connecting device 45b between the second unit 402 and the third unit 403 are respectively connected to the outer separator 41b of the second unit 402 and the inner separator 42c of the third unit 403, and respectively connected to the first notch 47b corresponding to the second unit 402 and the second notch 49c corresponding to the third unit 403. The third baffle 452 is surrounded on both sides of the bottom plate 451 to drain the third supernatant overflowing from the first notch 47b corresponding to the second unit 402 to the second notch 49c corresponding to the third unit 403, and then enter the inner separator 42c of the third unit 403.

[0072] In some embodiments, in addition to the connecting device 45a connected to the second unit 402, the first unit 401 is further provided with another connecting device 45c, which is used to drain the first supernatant separated by the sand bailing device 20 into the inner separator 42a corresponding to the first unit 401. The structure of the connecting device 45c can be the same as that of the above-mentioned connecting devices 45a and 45b.

[0073] Specifically, the first baffle plate 46 corresponding to the first unit 401 is provided with another first notch 47d in addition to the first notch 47a for communicating with the second unit 402. The second baffle plate 48 corresponding to the first unit 401 is provided with a second notch 49c. The above-mentioned other connecting device 45c of the first unit 401 is arranged across and connected to the top of the outer separator 41a and the top of the inner separator 42a of the first unit 401, and is arranged at the first notch 47d and the second notch 49c. Therefore, after the first supernatant separated from the sand bailing device 20 enters the connecting device 45c, it flows from the first notch 47d through the second notch 49c, and then flows into the inner separator 42a of the first unit 401.

[0074] The sedimentation device 50 is used to precipitate the concentrated liquid separated from the sediment separation device 40 (i.e., the sediment at the bottom of the outer separator of the sediment separation device 40) and the water liquid separated from the dehydration device 30. The sedimentation device 50 can be a sedimentation tank. The sediment in the sedimentation device 50 is a concentrated sediment water liquid, which is transported to the cyclone 60. Specifically, a sand pump is provided in the sedimentation tank, and the sand pump pumps the sediment water liquid precipitated in the sedimentation tank to the cyclone 60. The fifth supernatant in the sedimentation tank, that is, the supernatant when the system is shut down, flows into the sewage treatment device 70.

[0075] The cyclone 60 is arranged above the dewatering device 30, and is used to receive the silt water precipitated in the silt sedimentation device 50, and to separate the silt water. The lower layer silt liquid concentrated by the cyclone 60 is sprayed into the above-mentioned dewatering device 30 for dehydration. The dehydration procedure is the same as the processing procedure of the above-mentioned dewatering device 30. For example, the silt dehydrated by the dewatering device 30 is transported to the fine sand yard for draining, and the water liquid dehydrated by the dewatering device 30 flows into the silt sedimentation device 50 again for sedimentation. Therefore, the dewatering device 30 is also used to receive the concentrated lower layer silt liquid separated by the cyclone 60, and to dehydrate the concentrated lower layer silt liquid. The upper layer silt water separated by the cyclone 60 flows into the above-mentioned silt separation device 40 again, for example, and passes through the first unit 401, the second unit 402 and the third unit 403 in sequence again for cyclic sedimentation. Therefore, the sediment separation device 40 is also used to receive the upper sediment water separated by the cyclone 60 and separate the upper sediment water.

[0076] After the above-mentioned multiple separations, the sand is basically separated out. Compared with the sand, there is more mud in the fourth supernatant, and the subsequent steps are mainly to separate the mud.

[0077] The sewage treatment device 70 is disposed below the sediment separation device 40 so that the fourth supernatant separated by the sediment separation device 40 flows to the sewage treatment device 70 by gravity, and the fourth supernatant is precipitated and pressed to separate mud and clean water.

[0078] like Figure 7 and Figure 8 As shown, Figure 7 1 is a schematic diagram of a top view of the first treatment tank and the second treatment tank in the sewage treatment device of the embodiment of the present application. Figure 8 It is a schematic diagram of the structure of the sewage treatment device of an embodiment of the present application. The sewage treatment device 70 includes a first treatment tank 71, a second treatment tank 72 and a filter press 73. The first treatment tank 71 and the second treatment tank 72 are arranged at intervals from each other, for example, they can be separated by a concrete wall. The filter press 73 is connected to the first treatment tank 71 and the second treatment tank 72, and is used to receive the sewage in the first treatment tank 71 and press the sewage. The clean water after being pressed by the filter press 73 flows into the second treatment tank 72, thereby achieving mud and water separation. It can be understood that the sewage treated by the sewage treatment device may include the fourth supernatant separated from the sediment separation device 40, the fifth supernatant flowing in from the sediment sedimentation device 50, and the sewage flowing into the collection ditch.

[0079] Specifically, the first treatment pool 71 can also be called a sewage treatment pool, which can be cast by C30 impermeable concrete (impermeable P6 grade), the pool wall thickness is 300mm, HDPE waterproof membrane is set on the outer wall and the bottom of the pool, and the inner wall is brushed with immersion flexible waterproof coating twice.

[0080] The first treatment tank 71 may include a bottom wall 711, a side wall 712 and a cover plate 713. The bottom wall 711 and the side wall 712 enclose a storage space for accommodating sewage to be treated. The cover plate 713 is provided on the storage space to seal the first treatment tank 71. The cover plate 713 is provided with a water inlet, through which sewage can enter the storage space of the first treatment tank 71. The cover plate is also provided with an inspection hole, and the number of the inspection holes can be 1 or more, such as 3 or 4. The size of the inspection hole can be 1.2m*1.2m.

[0081] The bottom wall 711 is tilted relative to the horizontal plane, and its tilt angle can be greater than or equal to 6°. Specifically, the bottom wall 711 includes a first end 7111 and a second end 7112, wherein the distance between the first end 7111 and the top of the side wall 712 is less than the distance between the second end 7112 and the top of the side wall 712, that is, the bottom wall 711 is tilted downward from the first end 7111 to the second end 7112. The mud in the sewage in the first treatment tank 71 is deposited on the bottom wall 711, and mud (that is, thicker sewage) is formed on the bottom wall 711. Since the bottom wall 711 is tilted downward from the first end 7111 to the second end 7112, the mud flows from the first end 7111 to the second end 7112 along the bottom wall 711. In some embodiments, the upper surface of the bottom wall 711 is provided with a cement smooth surface, a glazed tile layer, a ceramic layer or a stainless steel layer, so as to increase the slippery fluidity of the mud, so that the mud in the sewage flows from the first end to the second end.

[0082] In some embodiments, a clean water nozzle defoaming device is further provided in the first treatment pool 71 to eliminate the foam generated in the first treatment pool. The clean water nozzle pipeline is connected by a clamp or hot-melt welding.

[0083] In some embodiments, the sewage treatment device 70 further includes a receiving tank 74 and a sewage pump 75 disposed in the receiving tank 74. The receiving tank 74 is adjacent to the second end 7112 of the first treatment tank 71 and is separated from the first treatment tank 71 by a side wall 712 of the first treatment tank 71. A sewage interface is disposed on the side wall 712 of the first treatment tank 71.

[0084] The sewage pump 75 is used to pump the sewage flowing to the second end 7112 to the filter press 73. The water inlet of the sewage pump 75 is connected to the sewage interface through a connecting pipe, and then connected to the first treatment tank 71, and the water outlet of the sewage pump 75 is connected to the filter press 73 to transfer the sewage input from the first treatment tank 71 to the filter press 73. The sewage pump 75 is arranged near the second end 7112 of the bottom wall 711, so that the sewage pump 75 can pump the slurry flowing along the bottom wall 711 to the second end 7112 into the filter press 73.

[0085] The second treatment tank 72 can also be called a clean water tank. The water inlet of the second treatment tank 72 is connected to the water outlet of the filter press 73 to collect the water separated from the filter press 73. The second treatment tank 72 also includes a side wall 721, a bottom wall 722 and a cover plate 723. The side wall 721 and the bottom wall 722 of the second treatment tank 72 form a receiving space for receiving clean water. The cover plate 723 is covered on the receiving space to seal the second treatment tank 72. A water inlet is provided on the cover plate 723, and sewage can enter the receiving space of the first treatment tank 72 through the water inlet. An inspection hole is also provided on the cover plate 723, and the number of the inspection holes can be 1 or more, such as 3 or 4. The size of the inspection hole can be 1.2m*1.2m.

[0086] The filter press 73 has a water inlet and a water outlet. The water inlet of the filter press 73 is connected to the first treatment tank 71 through a sewage pump 75. The sewage pump 75 transports the sewage flowing in from the bottom wall 711 to the water inlet of the filter press 73. The filter press 73 is used to press the sewage to separate the mud and water. Therefore, the sewage treatment device 70 can achieve sedimentation separation and compression separation of sewage.

[0087] The water outlet of the filter press 73 is connected to the water inlet of the second treatment tank 72. The filter press 73 is arranged above the second treatment tank 72. For example, the second treatment tank 72 is arranged under the ground outside the machine platform of the filter press 73, so that the clean water separated by the filter press 73 flows into the second treatment tank 72 by gravity (such as Figure 8 The filter press 73 is provided with a storage space below for storing the mud cake formed after pressing. The mud cake is transported to the mud and sand yard for draining, and the drained dry mud is used for brick making, and the drained sewage flows into the collection ditch. A collecting trough is also provided below the filter press 73 for collecting the seepage water generated during the pressing process and the mud release process. The collecting trough is connected to the first treatment tank 71 to return the seepage water to the first treatment tank 71 for circulation separation, and then circulation pressing. The sewage collected in the collection ditch is also returned to the first treatment tank 71 for circulation separation, and then circulation pressing.

[0088] In some embodiments, the number of sewage pumps 75 is 2, the number of filter presses 73 is 2, and the number of sewage interfaces is 2. The sewage pumps 75, the filter presses 73, and the sewage interfaces correspond one to one, that is, each sewage pump 75 is connected to a sewage interface and pumps sewage to the corresponding filter press 73.

[0089] The water in the second treatment pool 72 is transported to the machine work area for recycling. In some embodiments, the volume of the second treatment pool 72 is 450 tons, and the volume of the first treatment pool 71 is 358 tons. Due to the evaporation of production and the water carried away by the sediment every day, the entire production system needs to be supplemented with 20 tons of tap water every day.

[0090] The sewage treatment device 70 of the present application adopts a filter press 73. Taking a 400 square filter press as an example, the effective water pressing time of each filter press is: 30 minutes to press into mud, 20 minutes to open the plate to release mud, and each working cycle is 50 minutes in total. Each plate mud pressing working cycle presses 125 to 150 tons of clean water (with different mud concentrations). According to the calculation based on the principles of fluid mechanics and combined with actual measurements, the slag production and treatment system recycles 320 tons of clean water per hour; two mud presses can produce 300 to 360 tons of clean water per hour, which basically meets the demand for production circulating water.

[0091] The first treatment tank 71 in the sewage treatment device 70 of the present application is in a state of constant drying. According to the calculation based on the principle of fluid mechanics and combined with actual measurement, the slag production and treatment system discharges about 320 tons of sewage into the closed sewage tank per hour. The two filter presses 73 produce clean water equivalent to the amount of sewage per hour. At noon and at the end of the day, all the sewage is made into clean water, and the next shift continues to use clean water for production. The first treatment tank 71 is in a state of constant drying. It does not store sewage at ordinary times, but only circulates and treats sewage during production; in addition, the second treatment tank 72 contains 450 tons of water, which fully meets the demand for production circulation water. Before the second treatment tank 72 is overhauled every year, the water volume of the second treatment tank 72 is slowly reduced to the volume range of the first treatment tank 71, and the clean water is pumped to the first treatment tank 71 for temporary storage, and the second treatment tank 72 is overhauled. When the slag production and treatment system is running, when sewage flows into the first treatment tank 71, the filter press 73 is turned on to work.

[0092] In the sewage treatment device 70 of the present application, the top of the first treatment pool 71 is closed by a cover plate, which can be made of steel or concrete, and can be used as a pedestrian passage and for stacking maintenance materials, etc. Therefore, space can be saved and comprehensively utilized.

[0093] In addition, the vertical tank water treatment system requires space at a high place, uses fluid mechanics and sedimentation principles to produce clean water, and then uses a filter press to press mud to produce clean water; it also requires a ground collection pool to pump sewage to the vertical tank with a pump, and to pump the clean water from the filter press to the clean water tank with a pump. The first treatment tank in the sewage treatment device 70 of the present application is equivalent to an inverted vertical tank, and the above-mentioned sediment separation device is used to remove the sediment in the mud, and the filter press is directly used to produce clean water, omitting the intermediate vertical tank sedimentation to produce clean water, thereby improving work efficiency.

[0094] The present application also provides a slag treatment method, such as Fig. 9 As shown, Fig. 9 Schematic diagram of the slag treatment method of the present invention, which comprises the following steps:

[0095] M101. The sand bailing device receives the silt and sand water flowing out from the slag platform and separates the silt and sand water.

[0096] M102, the sediment separation device receives the supernatant separated by the sand dredging device and performs sedimentation separation.

[0097] M103. The sewage treatment device receives the supernatant separated by the sediment separation device and performs sedimentation and pressing separation to separate the mud and clean water.

[0098] In some embodiments, the method further includes: M104, a sediment sedimentation device receives sediment water precipitated in the sediment separation device, and performs sedimentation separation.

[0099] In some embodiments, the method further includes: M105, a dehydration device receives concentrated sediment water separated by the sand bailing device and performs dehydration treatment.

[0100] In some embodiments, the method further includes: M106, a cyclone receives the sediment water precipitated in the sediment precipitation device for separation.

[0101] In some embodiments, the method further includes: M107, a sediment separation device receives the upper sediment water separated by the cyclone and performs separation.

[0102] In some embodiments, the method further includes: M108, a sewage treatment device receives the supernatant in the sediment sedimentation device and separates it.

[0103] In some embodiments, the method further includes: M109, a dehydration device receives the concentrated lower layer sediment liquid separated by the cyclone and performs dehydration treatment.

[0104] In some embodiments, the method further includes: M110, a sediment sedimentation tank receives the water liquid dewatered by the dehydration device and performs sedimentation separation.

[0105] Among them, the sand dredging device, sediment separation device, sewage treatment device, sediment sedimentation device, dehydration device and cyclone in the slag treatment method can be corresponding devices in any of the above embodiments.

[0106] The slag treatment system of the present application has enhanced the water flow performance of the slurry due to multiple concentration cycles and dehydration, which can fully ensure its smooth circulation in the water pool. The underground depth of the water pool is 5.5m, the height of the top plate cover above the ground is ±0.00m, and the inclined pool starts to slope from -2.0m to the bottom of the water pool (near the filter press pump pool).

[0107] In addition, according to the principle of gravity, the sewage produced by the production line will flow naturally by gravity into the dark box sediment separation device and the first treatment tank of the sewage treatment device; based on the same principle, the clean water produced by the filter press will flow naturally by gravity into the second treatment tank of the sewage treatment device; thus reducing water pumping and discharge and reducing energy consumption.

[0108] The slag treatment system of this application adopts the above-mentioned sediment separation device based on comprehensive consideration of the water consumption of the production process, combined with the fully enclosed first treatment tank in the sewage pool treatment device. There is no need to use a track pump to pump mud or use a vertical tank for sedimentation. The production sewage can be directly filtered to generate clean water for recycling production. The use of this process has greatly improved the scrap metal recovery rate, purified the purity of the tailings, improved the visual effect of the plant, and greatly reduced production energy consumption. At present, we have successively adopted this process in 2 slag plants, and the effect is quite obvious. The scrap metal recovery rate has increased by 5%, the tailings purity has increased by 10%, and energy consumption has been saved by 10%.

[0109] The slag treatment system and method of the present application also have the following effects:

[0110] (1) The working environment has changed from the previous "wet operation" to "dry operation". The improvement of water quality indirectly affects the slag purification rate. Clean water can clean the slag crushing materials more cleanly, making it easier to select the waste aluminum when the eddy current is working, thereby improving the recovery rate. At the same time, the metal content in the tailings is reduced, and when the waste is reused, it is less likely to crack in brick making and plastering. (The working principle diagram of the aluminum jumping machine, less foam in the water, reduced resistance, and improved recovery rate).

[0111] (2) Since the first treatment pool in the sewage treatment device is closed by a cover plate, it can control the water vapor from leaking out and corroding the steel, ensuring the beauty and cleanliness of the factory area, long-term use without hidden dangers, and reducing energy consumption. The vertical tank water pool can only control the water vapor from leaking out and corroding the steel, ensuring the beauty and cleanliness of the factory area. In addition, due to the characteristics of slag after incineration, the entire production process is strongly alkaline, and the pH value of the circulating production can reach about 11, which is extremely corrosive to steel and rubber. The fully enclosed water pool process is resistant to strong alkali, has a long service life, and is once and for all.

[0112] (3) The fully enclosed first treatment tank in the sewage treatment device of the present application can greatly reduce the repeated generation of impact foam and press the foam into mud cakes at one time. At the same time, the small amount of foam generated is enclosed in the water tank for sewage process treatment, which has a very high visual aesthetics.

[0113] (4) Since the first treatment pool and the second treatment pool can be closed by a cover plate, the leachate from the sand bin and mud cake pile and the scattered water from the shaking table working area can be collected and recycled for production.

[0114] (6) A fully enclosed sewage treatment pool is used. This process equipment saves 60KW of energy, works 10 hours a day, saves 600 degrees of energy, and saves 216,000 degrees of electricity per year, reducing the consumption of natural resources caused by power generation.

[0115] (7) Based on the energy consumption of thermal power plants per kilowatt-hour, this is equivalent to reducing coal consumption by 82 tons per year, reducing pure water loss by 823 tons, reducing CO2 emissions by 205 tons, and reducing SO2 emissions by 5.7 tons. From another perspective, this is equivalent to planting 6,800 more trees per year.

[0116] In summary, the fully enclosed water pool is safer, energy-saving and environmentally friendly than the fourth-generation vertical tank water pool equipment, and meets the national call for "green energy conservation and environmental protection".

[0117] The above descriptions are only some embodiments of the present application, and do not limit the protection scope of the present application. Any equivalent device or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A slag treatment system, characterized in that: include: A sand scooping device, used to receive the silt water flowing out from the slag platform and separate the silt water; The sediment separation device is used to receive the supernatant separated by the sand dredging device and perform sedimentation separation; and The sewage treatment device is used to receive the supernatant separated by the sediment separation device, and to perform sedimentation and pressure separation to separate the mud and clean water; wherein, The sewage treatment device comprises: A first treatment tank, comprising a bottom wall and a side wall, wherein the bottom wall and the side wall enclose a containing space for containing the supernatant separated from the sediment separation device; a filter press, connected to the first treatment tank, for receiving sewage flowing in from the bottom wall and pressing the sewage flowing in to separate mud from water; The sediment separation device comprises at least two units, which are defined as a first unit and a second unit, and the first unit and the second unit are connected via a connecting device; The first unit is used to receive the supernatant separated by the sediment separation device, and to precipitate to further separate the supernatant; the supernatant overflowing from the first unit after separation flows into the second unit through the connecting device, and the separated supernatant is further precipitated and overflows to be transported to the sewage treatment device; the bottom of the first unit and the second unit are provided with a sedimentation outlet to discharge the sediment.

2. The slag treatment system according to claim 1, characterized in that: Units 1 and 2 both include: An outer separator defines a first accommodating space; An inner separator is received in the first accommodation space and defines a second accommodation space; A partition space is formed between the outer wall of the second accommodating space and the inner wall of the first accommodating space, and a connecting opening is provided at the bottom of the inner separator to connect the second accommodating space with the partition space, so that the supernatant separated from the sand bailing device that enters the inner separator of the first unit enters the partition space from the connecting opening, and the supernatant separated from the sand bailing device after sedimentation overflows from the top of the outer separator through the connecting device to flow into the inner separator of the second unit, and enters the partition space from the connecting opening of the second unit for sedimentation, so that the supernatant after sedimentation overflows from the top of the outer separator.

3. The slag treatment system according to claim 2, characterized in that: The top of the outer separator is provided with a first open port, and the supernatant of the sediment water overflows from the first open port; the top of the inner separator is provided with a second open port for receiving the sediment water.

4. The slag treatment system according to claim 2, characterized in that: The sediment separation device also includes a bracket, which spans the first opening and is mounted on the top of the outer separator; the top of the inner separator is connected to the bracket to suspend the inner separator in the first accommodating space.

5. The slag treatment system according to claim 2, characterized in that: A baffle is arranged around the top of the inner separator, and the top of the baffle is higher than the top of the outer separator.

6. The slag treatment system according to claim 2, characterized in that: The outer separator and the inner separator are both in cone shape.

7. The slag treatment system according to claim 2, characterized in that: The sediment separation device also includes a first baffle and a second baffle, the first baffle is arranged around the top of the outer separators of the first unit and the second unit, wherein the first baffle is respectively provided with a first notch at a position corresponding to the first unit and the second unit, so that the supernatant overflows from the first notch to the outside of the outer separator of the corresponding unit; the second baffle is arranged around the top of the inner separators of the first unit and the second unit, wherein the second baffle is at least provided with a second notch at a position corresponding to the second unit; the two ends of the connecting device are respectively connected to the outer separator of the first unit and the inner separator of the second unit, and correspond to the first notch of the first unit and the second notch of the second unit respectively.

8. The slag treatment system according to claim 2, characterized in that: The connecting device includes a third baffle and a bottom plate, the two ends of the bottom plate are respectively connected to the outer separator of the first unit and the inner separator of the second unit, and are respectively connected to the first notch and the second notch, and the third baffle is arranged on both sides of the bottom plate to drain the supernatant overflowing from the first notch of the first unit to the second notch and enter the inner separator of the second unit.

9. The slag treatment system according to claim 1, characterized in that: Also includes: The sediment settling device is used to receive the sediment water settled in the sediment separation device and perform sedimentation and separation. The dewatering device is used to receive the concentrated sediment water separated by the sand bailing device and perform dewatering treatment. The cyclone is used to receive the sediment water precipitated in the sediment precipitation device for separation.

10. The slag treatment system according to claim 9, characterized in that: The sewage treatment device also includes: A receiving tank, which is separated from the side wall of the first treatment tank, and a sewage interface is provided on the side wall of the first treatment tank; A sewage pump, wherein the water inlet of the sewage pump is connected to the sewage interface through a connecting pipe, and then connected to the first treatment tank, and the water outlet of the sewage pump is connected to the filter press to transfer the sewage input from the first treatment tank to the filter press.

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