A coagulation and sedimentation reactor for wastewater produced by a small-flow carbon roasting furnace

Abstract

The utility model discloses a coagulation and sedimentation reactor for producing wastewater from a small-flow carbon roasting furnace, comprising a coagulation and sedimentation reactor body, wherein the coagulation and sedimentation reactor body is internally divided into a first reaction zone, a second reaction zone, a third reaction zone and a sedimentation zone, a water inlet flange is arranged on the top of the first reaction zone, water collecting and distributing components for uniformly mixing wastewater and a coagulant are respectively arranged between the first reaction zone and the second reaction zone and between the second reaction zone and the third reaction zone, a feeding pipe is arranged above the top water collecting and distributing components of the second reaction zone and the third reaction zone, a sedimentation zone water inlet component is arranged in the sedimentation zone, an overflow weir component is arranged on the top of the sedimentation zone, a venting pipe connected with each zone is arranged on the bottom side wall of the coagulation and sedimentation reactor body, the venting pipe has the function of replacing a stirring device, the wastewater sprayed out is fully in contact with the reagent, and the reaction efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, in particular to a coagulation and precipitation reactor for wastewater produced by a small-flow carbon roasting furnace. Background Art

[0002] A carbon roaster is a device used for high-temperature processing of petroleum coke. It converts raw materials into high-quality carbon products, such as graphite electrodes, prebaked anodes, etc. A coagulation reactor is a device used for water treatment. Its function is to convert pollutants in water into solid particles through chemical reactions, thereby purifying water quality.

[0003] A certain amount of wastewater will be generated during the production process of the carbon roasting furnace. A coagulation and sedimentation reactor will be used in the treatment of the wastewater. However, the wastewater generated by some roasting furnaces may be small in volume. If a traditional coagulation and sedimentation reactor is used to treat a small amount of wastewater, some problems will arise. For example, if a relatively large coagulation and sedimentation reactor is used, the investment cost will be high, resulting in a waste of equipment cost. If a smaller coagulation and sedimentation reactor is used, uneven reaction may occur, and there may be no corresponding stirring equipment to adapt, resulting in wastewater overflow during stirring. Utility Model Content

[0004] The utility model aims to provide a coagulation and sedimentation reactor for producing wastewater from a small-flow carbon roasting furnace, so as to solve the problem that in the treatment of small-flow wastewater, in order not to waste equipment costs and reduce the volume of the coagulation and sedimentation reactor, but because there is no stirrer with corresponding power, the use of a stirrer with a larger power easily causes the liquid in the reactor to form a vortex and overflow.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a coagulation and sedimentation reactor for producing wastewater from a small-flow carbon roasting furnace, comprising a coagulation and sedimentation reactor body, wherein the coagulation and sedimentation reactor body is divided into a first reaction zone, a second reaction zone, a third reaction zone and a sedimentation zone, wherein the first reaction zone is arranged on the right side inside the coagulation and sedimentation reactor body, a water inlet flange is arranged on the top of the first reaction zone, the second reaction zone is arranged on the left side of the first reaction zone, the third reaction zone is arranged on the rear side of the second reaction zone, and the sedimentation zone is arranged on the right side of the third reaction zone, and water collection and distribution components for uniformly mixing wastewater and chemical agents are respectively arranged between the first reaction zone and the second reaction zone and between the second reaction zone and the third reaction zone, a feeding pipe is arranged above the top water collection and distribution components of the second reaction zone and the third reaction zone, a sedimentation zone water inlet component is arranged in the sedimentation zone, an overflow weir component is arranged on the top of the sedimentation zone, and vent pipes connected to the first reaction zone, the second reaction zone, the third reaction zone and the sedimentation zone are respectively arranged on the bottom side walls of the coagulation and sedimentation reactor body.

[0006] Preferably, the water collection and distribution assembly includes a water collection horizontal pipe and a water collection vertical pipe installed on the same wall surface, a plurality of water collection holes are opened on the water collection horizontal pipe, and a water distribution cap is provided on the top of the water collection vertical pipe.

[0007] Preferably, the precipitation zone water inlet assembly comprises a central tube, a water inlet pipe is connected through the central tube and the third reaction zone, a connecting piece is arranged at the bottom of the central tube, and a reflecting plate is arranged at the bottom of the connecting piece.

[0008] Preferably, the overflow weir assembly includes a water collecting trough arranged around the inner wall of the sedimentation zone, the side wall height of the water collecting trough close to the central tube is lower than the side wall height of the sedimentation zone, and an outlet pipe passing through the side wall of the sedimentation zone is arranged on one side of the water collecting trough.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] (1) By arranging water collecting and distributing components between the first reaction zone and the second reaction zone, and between the second reaction zone and the third reaction zone, respectively, wastewater enters the water collecting transverse pipe through the water collecting hole and flows into the next-stage reaction zone. The wastewater is sprayed out through the water distributing cap by relying on the liquid level difference. The liquid sprayed out from the water distributing cap is in full contact with the chemical agent added from the feeding pipe by utilizing the velocity gradient of the wastewater spraying, thereby improving the reaction efficiency and completely replacing the function of the stirring device, thereby avoiding the problem of liquid forming a vortex and causing overflow due to the mismatch of the stirring device. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0012] Figure 2 It is a top view of the utility model;

[0013] Figure 3 for Figure 2 Cross-section of the middle AA;

[0014] Figure 4 for Figure 2 Cross-section of the BB.

[0015] In the figure: 1. coagulation-sedimentation reactor body; 2. first reaction zone; 3. second reaction zone; 4. third reaction zone; 5. sedimentation zone; 6. water inlet flange; 7. water collection and distribution assembly; 71. water collection horizontal pipe; 72. water collection vertical pipe; 73. water collection hole; 74. water distribution cap; 8. feeding pipe; 9. sedimentation zone water inlet assembly; 91. center tube; 92. water inlet pipe; 93. connector; 94. reflection plate; 10. overflow weir assembly; 101. water collection tank; 102. outlet pipe; 11. vent pipe. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, rather than all the embodiments. The components of the embodiment of the utility model generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiment of the utility model provided in the drawings is not intended to limit the scope of the utility model for protection, but merely represents the selected embodiment of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0017] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0018] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0019] See also Figure 1 , 2 and 4. An embodiment of the utility model is provided: a coagulation and sedimentation reactor for wastewater produced by a small-flow carbon roasting furnace, comprising a coagulation and sedimentation reactor body 1, wherein the coagulation and sedimentation reactor body 1 is divided into a first reaction zone 2, a second reaction zone 3, a third reaction zone 4 and a sedimentation zone 5, the first reaction zone 2 is arranged on the right side inside the coagulation and sedimentation reactor body 1, and a water inlet flange 6 is arranged on the top of the first reaction zone 2. Wastewater enters the reactor through the water inlet flange and first enters the first reaction zone 2; the second reaction zone 3 is arranged on the left side of the first reaction zone 2, the third reaction zone 4 is arranged on the rear side of the second reaction zone 3, and the sedimentation zone 5 is arranged on the right side of the third reaction zone 4. Water collection and distribution components 7 for uniformly mixing wastewater and coagulant aids are respectively arranged between the first reaction zone 2 and the second reaction zone 3 and between the second reaction zone 3 and the third reaction zone 4, wherein the water collection and distribution component 7 comprises a water collection horizontal pipe 71 and a water collection vertical pipe 71 installed on the same wall surface. Pipe 72, a plurality of water collecting holes 73 are opened on the water collecting transverse pipe 71, a water distribution cap 74 is arranged on the top of the water collecting vertical pipe 72, and a feeding pipe 8 is arranged above the top water distribution cap 74 of the second reaction zone 3 and the third reaction zone 4, the wastewater enters the water collecting transverse pipe 71 from the water collecting hole 73, the wastewater of the first reaction zone 2 flows into the water collecting transverse pipe 71 located in the second reaction zone 3, and the wastewater is sprayed out through the water distribution cap 74 of the second reaction zone 3 by relying on the liquid level difference, and contacts with the chemical agent transported by the feeding pipe 8 here for sufficient coagulation reaction, the wastewater in the second reaction zone 3 flows into the third reaction zone 4 through the water collecting and distributing assembly 7 between the second reaction zone 3 and the third reaction zone 4 according to the secondary principle, and contacts with the coagulant aid transported by another feeding pipe 8 here to form large particle flocs, and the feeding pipes 8 for transporting chemical agents are all arranged directly above the water distribution cap 74, and the velocity gradient of the wastewater spraying is utilized to fully contact with the agent to improve the reaction efficiency.

[0020] like Figure 2 and Figure 3As shown, a sedimentation zone water inlet assembly 9 is provided in the sedimentation zone 5, wherein the sedimentation zone water inlet assembly 9 includes a central tube 91, a water inlet pipe 92 is connected between the central tube 91 and the third reaction zone 4, a connector 93 is provided at the bottom of the central tube 91, a reflector 94 is provided at the bottom of the connector 93, and the wastewater in the third reaction zone 4 enters the central tube 91 through the water inlet pipe 92, flows downward to the reflector 94, and large particle flocs with a density greater than that of water are precipitated to the bottom of the reactor, and are connected to the vent pipe 11 provided on one side of the bottom of the sedimentation zone 5 through an extraction pump, so that the large particle flocs are pumped away regularly, and the treated liquid enters the overflow weir assembly 10 as the accumulated water level gradually rises.

[0021] like Figure 1 , 2 As shown in FIG. 3 , an overflow weir assembly 10 is provided at the top of the sedimentation zone 5, wherein the overflow weir assembly 10 includes a water collecting trough 101 arranged around the inner wall of the sedimentation zone 5, the side wall height of the water collecting trough 101 close to the central tube 91 is lower than the side wall height of the sedimentation zone 4, and an outlet pipe 102 passing through the side wall of the sedimentation zone 5 is provided on one side of the water collecting trough 101. As the water level in the sedimentation zone 5 continues to rise, the water reaches the water inlet trough 101 and is then discharged from the outlet pipe.

[0022] Vent pipes 11 connected to the first reaction zone 2, the second reaction zone 3, the third reaction zone 4 and the precipitation zone 5 are respectively arranged on the bottom side walls of the coagulation and sedimentation reactor body 1. By providing the vent pipe 11 at the bottom of each reaction zone and setting a vent valve on the vent pipe 11, the inside of the reactor is emptied regularly to prevent asphalt precipitates in the wastewater produced by the carbon roasting furnace from accumulating and solidifying at the bottom of the reactor to reduce the volume of the reactor.

[0023] When the embodiment of the present application is in use: first, wastewater enters the first reaction zone 2 from the water inlet flange 6, accumulates in the first reaction zone, enters the wastewater into the water collecting cross pipe 71 from the water collecting hole 73, and is sprayed out through the water distribution cap 74 of the second reaction zone 3 due to the liquid level difference. Chemical agents are added through the feeding pipe 8, and the velocity gradient of the wastewater is utilized to fully contact with the agents to improve the reaction efficiency. After passing through the second reaction zone 3 and the third reaction zone 4, the wastewater enters the central tube 91 through the water inlet pipe 92 and flows to the reflector 94. The large particle flocs have a density greater than that of water and are precipitated to the bottom of the reactor. The treated liquid gradually rises with the accumulated water level, enters the overflow weir assembly 10 and is discharged from the outlet pipe 102.

[0024] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A coagulation and sedimentation reactor for wastewater produced by a small-flow carbon roasting furnace, comprising a coagulation and sedimentation reactor body (1), characterized in that: The coagulation-sedimentation reactor body (1) is divided into a first reaction zone (2), a second reaction zone (3), a third reaction zone (4) and a sedimentation zone (5); the first reaction zone (2) is arranged on the right side of the coagulation-sedimentation reactor body (1); a water inlet flange (6) is arranged on the top of the first reaction zone (2); the second reaction zone (3) is arranged on the left side of the first reaction zone (2); the third reaction zone (4) is arranged on the rear side of the second reaction zone (3); the sedimentation zone (5) is arranged on the right side of the third reaction zone (4); and the first reaction zone (2) and the second reaction zone (3) are spaced apart from each other. A water collecting and distributing assembly (7) for uniformly mixing wastewater and chemical agents is respectively arranged between the first reaction zone (2) and the third reaction zone (4); a feeding pipe (8) is arranged above the top water collecting and distributing assembly (7) of the second reaction zone (3) and the third reaction zone (4); a sedimentation zone water inlet assembly (9) is arranged in the sedimentation zone (5); an overflow weir assembly (10) is arranged at the top of the sedimentation zone (5); and a vent pipe (11) connected to the first reaction zone (2), the second reaction zone (3), the third reaction zone (4) and the sedimentation zone (5) is respectively arranged on the bottom side wall of the coagulation sedimentation reactor body (1).

2. A small flow carbon roasting furnace production wastewater coagulation and sedimentation reactor according to claim 1, characterized in that: The water collection and distribution assembly (7) comprises a water collection horizontal pipe (71) and a water collection vertical pipe (72) installed on the same wall surface, a plurality of water collection holes (73) are provided on the water collection horizontal pipe (71), and a water distribution cap (74) is provided on the top of the water collection vertical pipe (72).

3. A small flow carbon roasting furnace production wastewater coagulation and sedimentation reactor according to claim 1, characterized in that: The precipitation zone water inlet assembly (9) comprises a central tube (91), a water inlet pipe (92) is connected between the central tube (91) and the third reaction zone (4), a connecting piece (93) is arranged at the bottom of the central tube (91), and a reflecting plate (94) is arranged at the bottom of the connecting piece (93).

4. A small flow carbon roasting furnace production wastewater coagulation and sedimentation reactor according to claim 3, characterized in that: The overflow weir assembly (10) comprises a water collecting trough (101) arranged around the inner wall of the sedimentation area (5); the height of the side wall of the water collecting trough (101) close to the central tube (91) is lower than the height of the side wall of the sedimentation area (5); and an outlet pipe (102) passing through the side wall of the sedimentation area (5) is arranged on one side of the water collecting trough (101).

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