Heater for pyrolysis technique for treating wastewater

Abstract

The application discloses a heater for treating wastewater by thermal cracking technology, which comprises a box body, a heating structure arranged in an inner cavity of the box body, wherein the heating structure comprises a steam pipe, the steam pipe is rotatably connected in the inner cavity of the box body, a plurality of gas outlet holes are arranged on both sides of the surface of the steam pipe, lugs are arranged on both sides of the surface of the steam pipe, a plurality of poking blocks are arranged on the surface center of the steam pipe, and a brush is arranged on one end of each poking block; sliding rods are limitingly connected to the upper and lower sides of the steam pipe, the sliding rods drive a rotating plate to reciprocatingly move up and down, a gas collecting port is arranged at the top of the inner cavity, a preheating pipe is arranged on the surface of the material inlet of the box body, and the gas collecting port is in communication with the preheating pipe; the heating structure is arranged, the steam pipe of the heating structure overflows heating steam through the gas outlet holes on the surface, sewage in the inner cavity is heated to realize thermal cracking, the steam pipe is driven to rotate by a motor to make the heating steam uniformly heated, and the subsequent stirring structure is driven to transmit and clean the surface of the filter screen.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a heater for treating wastewater using pyrolysis technology. Background Technology

[0002] The production of nitrochlorobenzene generates organic wastewater containing nitrates and phenols. This wastewater is highly toxic to organisms and difficult to treat. Nitro groups and hydroxyl groups need to be removed from the organic wastewater before it can enter the biodegradation device. The organic wastewater is first adjusted to pH by adding alkali, then heated by a heater, and then enters a pyrolysis reactor for a period of time. After pyrolysis, a small amount of nitrate- and phenol-containing compounds in the wastewater are broken down into linear organic compounds with lower biotoxicity. The wastewater after high-temperature pyrolysis is cooled and then enters the subsequent wastewater treatment process.

[0003] The pyrolysis efficiency is high, and the removal rate of nitro and phenol is expected to reach over 99%. The pyrolysis of wastewater is carried out in a reactor to remove nitro. Existing technology includes a wastewater heating device, such as an industrial wastewater treatment device with publication number CN114314717A, which includes a treatment tank. A fixed heating tube is fixedly installed on the inner wall of the treatment tank. An agitator is installed inside the fixed heating tube. The agitator includes an electric shaft, and a rotating ball is fixedly installed on the outer wall of the electric shaft. A groove is fixedly formed on the outer wall of the rotating ball.

[0004] This type of wastewater treatment device uses agitator plates at the edge of the heating pipe to stir the wastewater, and then heats it by transferring heat through the heating pipe. However, the efficiency of heat transfer through the heating pipe is limited. Furthermore, the generation of steam during heating results in a small increase in internal pressure, meaning the volume of heated gas entering the preheating pipe for preheating is too small, leading to unsatisfactory preheating efficiency. Summary of the Invention

[0005] The purpose of this invention is to solve the problems of poor heat transfer effect of heating tubes for thermal pyrolysis of wastewater and insufficient increase in domestic gas pressure inside the container, which leads to unsatisfactory preheating effect of heating gas entering the preheating tube. Therefore, this invention proposes a heater for wastewater treatment using thermal pyrolysis technology.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A heater for treating wastewater using pyrolysis technology includes a housing with an inner cavity. The top of the inner cavity has a feed inlet, and the bottom of the inner cavity has a discharge pipe. A heating structure is installed inside the inner cavity, including a steam pipe that is rotatably connected inside the housing. The steam pipe has several air outlets on both sides of its surface, protrusions on both sides of its surface, and several actuating blocks at the center of its surface. One end of each actuating block has a brush.

[0008] Agitation structures are provided on both the upper and lower sides of the steam pipe, the agitation structures including:

[0009] Two limiting rods are located on both sides below the steam pipe;

[0010] Two limiting plates are set on both sides above the steam pipe, and a filter screen is installed between the two limiting plates;

[0011] A sliding rod is located within a slidable limiting connection within a limiting rod or limiting plate. A mounting plate is provided at the end of the sliding rod away from the steam pipe. The mounting plate is elastically connected to the limiting rod or limiting plate. Two rotating plates are rotatably provided on both sides of the mounting plate.

[0012] An air collection port is provided at the top of the inner cavity, a preheating pipe is provided on the surface of the inlet of the box, the air collection port is connected to the preheating pipe, and an outlet is provided at the bottom of the inner cavity, which is connected to the outlet pipe.

[0013] As a further aspect of the present invention: a reset spring is provided between the mounting plate and the limiting rod and the limiting plate, and the reset spring is sleeved on the surface of the sliding rod.

[0014] As a further aspect of the present invention: the steam pipe is arranged horizontally within the inner cavity.

[0015] As a further embodiment of the present invention: one end of the limiting rod is connected to the inner walls on both sides of the inner cavity, and the three sides of the limiting plate are fixedly connected to the inner walls of the inner cavity.

[0016] As a further aspect of the present invention: the length of several actuating blocks gradually decreases from the center to both sides.

[0017] As a further aspect of the present invention: the shape of the gas collecting port is a trapezoid that is narrower at the top and wider at the bottom, and the shape of the discharge port is a trapezoid that is wider at the top and narrower at the bottom.

[0018] As a further aspect of the present invention, a valve is provided inside the discharge pipe.

[0019] As a further aspect of the present invention: the side of the protrusion that contacts the sliding rod is a smooth arc shape.

[0020] As a further aspect of the present invention: a motor is provided on the outer surface of the box, and the output end of the motor is coaxially connected to the steam pipe.

[0021] The beneficial effects of this invention are:

[0022] (1) The heater for treating wastewater by thermal decomposition technology of the present invention is provided with a heating structure. Heating steam overflows from the steam pipe surface of the heating structure to heat the sewage in the inner cavity to achieve thermal decomposition. The motor drives the steam pipe to rotate so that the heating steam heats up evenly, and at the same time drives the subsequent stirring structure to perform transmission and clean the filter screen surface.

[0023] (2) The heater for treating wastewater by the thermal decomposition technology of the present invention is provided with an agitation structure. The sliding rod of the agitation structure slides back and forth on the upper and lower surfaces of the steam pipe, thereby causing the rotating plate to open and close during the sliding process, driving the nearby solution to gather towards the steam pipe. At the same time, the rotating plate blocks the overflowing heating steam, so that the heating steam stays in the vicinity for a longer time, further improving the thermal decomposition efficiency of the heating steam on the wastewater.

[0024] (3) The heater for treating wastewater by the thermal decomposition technology of the present invention is provided with a preheating tube. The generation of heating steam in the inner cavity increases the gas pressure in the inner cavity. The heating steam and generated gas will pass through the preheating tube, thereby raising the temperature of the preheating tube. When the wastewater is put into the feed port, the preheating tube will preheat the wastewater, thereby reducing the reaction time of subsequent thermal decomposition and improving the heating efficiency.

[0025] (4) The heater for treating wastewater using the thermal decomposition technology of the present invention is equipped with a filter screen. The filter screen filters the wastewater and gas passing through. During the rotation of the steam pipe, the agitator on the surface of the steam pipe will agitate the mesh surface of the filter screen, thereby causing the filter screen to shake and clear the residue on the mesh surface. The brush connected to the agitator cleans the lower mesh surface of the filter screen. Attached Figure Description

[0026] The invention will now be further described with reference to the accompanying drawings.

[0027] Figure 1 This is a schematic diagram of the structure of the heater used in the wastewater treatment using the thermal pyrolysis technology of this invention;

[0028] Figure 2 This is a cross-sectional schematic diagram of a heater used in the wastewater treatment process using the thermal pyrolysis technology of this invention;

[0029] Figure 3 This is a schematic diagram of the stirring structure of the present invention;

[0030] Figure 4 This is a schematic diagram of the steam pipe structure of the present invention.

[0031] In the diagram: 1. Box body; 2. Inner cavity; 3. Heating structure; 31. Motor; 32. Steam pipe; 33. Air outlet; 34. Protrusion; 35. Actuating block; 36. Brush; 4. Agitating structure; 41. Limiting rod; 42. Limiting plate; 43. Sliding rod; 44. Mounting plate; 45. Return spring; 46. Rotating plate; 5. Filter screen; 6. Feeding structure; 61. Air collection port; 62. Vent pipe; 63. Feed inlet; 64. Preheating pipe; 7. Discharge structure; 71. Discharge port; 72. Discharge pipe; 73. Valve. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Example 1

[0034] Please see Figure 1-4 As shown, this invention is a heater for treating wastewater using pyrolysis technology. It includes a housing 1 with an inner cavity 2 inside. A heating structure 3 is located inside the inner cavity 2, and a steam pipe 32 of the heating structure 3 is rotatably mounted within the inner cavity 2, arranged horizontally within the inner cavity 2. A motor 31 is located outside the housing 1, and the output end of the motor 31 is coaxially and fixedly connected to the steam pipe 32. Several vent holes 33 are provided on both sides of the surface of the steam pipe 32, allowing heating steam to overflow from the vent holes 33 to heat the wastewater in the inner cavity 2. Protrusions 34 are provided on both sides of the surface of the steam pipe 32, with the side of the protrusions 34 furthest from the steam pipe 32 being arc-shaped. Several actuating blocks 35 are provided at the center of the surface of the steam pipe 32, with the height of the actuating blocks 35 gradually decreasing from the center to both ends. Each actuating block 35 has a brush 36 at the end furthest from the steam pipe 32.

[0035] An agitation structure 4 is installed inside the inner cavity 2, located on the upper and lower sides of the steam pipe 32. Limiting rods 41 of the agitation structure 4 are fixedly installed on both sides of the inner cavity 2, positioned below the steam pipe 32. One end of each limiting rod 41 is fixedly connected to the inner wall of the inner cavity 2, and the distance between the two limiting rods 41 is greater than the farthest distance of the two agitator blocks 35. The two limiting rods 41 are located within the center plane of the housing 1. Sliding rods 43 are slidably installed inside each limiting rod 41. A mounting plate 44 is fixedly connected to the bottom of each sliding rod 43. Rotating plates 46 are rotatably installed on both sides of the mounting plate 44 along the direction of the steam pipe 32. A return spring 45 is installed between the mounting plate 44 and the limiting rod 41, and the return spring 45 is sleeved on the surface of the sliding rod 43. A limiting plate 42 is installed above the steam pipe 32, and the limiting plate 42 is fixedly installed on the inner walls of both sides. Three sides of the limiting plate 42 are fixedly connected to the inner wall of the inner cavity 2. Sliding rods 43 are slidably installed between the two limiting plates 42. Mounting plates 44 are fixedly installed on the top of the sliding rods 43 on both sides. Rotating plates 46 are rotatably installed on both sides of the mounting plates 44. A return spring 45 is installed between the mounting plate 44 and the limiting plate 42, and the return spring 45 is sleeved on the surface of the sliding rod 43. A filter screen 5 is installed between the two limiting plates 42, and the width of the filter screen 5 is adapted to the spacing of several toggle blocks 35 below.

[0036] The top of the housing 1 is provided with a feeding structure 6. The air collection port 61 of the feeding structure 6 is located on the inner wall of the top of the housing 1. The shape of the air collection port 61 is trapezoidal, narrower at the top and wider at the bottom. The bottom of the preheating pipe 64 is connected to the inner cavity 2. The upper part of the preheating pipe 64 is provided with a feeding port 63. The top of the air collection port 61 is provided with a vent pipe 62. The top of the housing 1 is provided with the preheating pipe 64. One end of the vent pipe 62 is connected to the preheating pipe 64. The bottom of the housing 1 is provided with a discharging structure 7. The discharge port 71 of the discharging structure 7 is located on the inner wall of the bottom of the housing 1. The shape of the discharge port 71 is trapezoidal, wider at the top and narrower at the bottom. The bottom of the discharge port 71 is provided with a discharge pipe 72. A valve 73 is provided on the discharge pipe 72.

[0037] When using this pyrolysis technology to treat wastewater with a heater, the wastewater to be pyrolyzed is injected into the inlet 63 and enters the inner cavity 2 to await heating. The steam pipe 32 is activated, causing heated steam to overflow from several vent holes 33 on both sides of its surface, heating the wastewater inside and thus performing pyrolysis. At this time, the motor 31 is activated, and its output drives the coaxially connected steam pipe 32 to rotate. Heating steam is evenly released from the vent holes 33 on the surface of the steam pipe 32 inside the inner cavity 2, uniformly heating the wastewater within the cavity. During the rotation of the steam pipe 32, the protrusions 34 on the surface of the steam pipe 32 will contact the sliding rods 43 on the upper and lower sides. During the contact process, the corresponding sliding rods 43 are subjected to the action of the protrusions 34 and the return spring 45, and will slide up and down within the limiting rod 41 or the limiting plate 42. At the same time, the rotating plates 46 on both sides of the mounting plate 44 will expand in the solution, thereby causing the nearby liquid to gather near the steam pipe 32. At the same time, it will also provide a certain degree of isolation for the heating steam overflowing from the steam pipe 32, so that the heating steam stays in the vicinity for a longer time and increases the heating efficiency. As heating steam is generated, the internal pressure of the inner cavity 2 increases. The heating steam and the gas produced by the pyrolysis of wastewater move through the filter screen 5 to the upper gas collection port 61. The high-temperature gas enters the preheating pipe 64 from the gas collection port 61 through the vent pipe 62, thereby preheating the temperature inside the preheating pipe 64. When wastewater is fed into the feed port 63, the preheating pipe 64 will preheat the wastewater, increasing the efficiency of subsequent pyrolysis of the wastewater. When wastewater passes through the filter screen 5 into the lower part or gas passes through the filter screen 5 into the upper preheating pipe 64, debris will accumulate on both the upper and lower surfaces of the filter screen 5. When the steam pipe 32 rotates, several actuating blocks 35 set in the middle of the steam pipe 32 will contact the lower mesh surface of the filter screen 5. The length of the actuating blocks 35 gradually decreases from the center to both sides. The actuating block 35 in the center actuates the mesh surface significantly, while the actuating blocks 35 on both sides actuate the mesh surface slightly to adapt to the deformation of the mesh surface and shake the mesh surface, thus clearing the debris clogging the mesh surface. A brush 36 is provided at one end of the actuating block 35. The brush 36 cleans the lower surface of the filter screen 5 during rotation. After the pyrolysis is completed, the wastewater is discharged by opening the valve 73 and passing through the discharge port 71 into the lower discharge pipe 72.

[0038] The side of the protrusion 34 that contacts the sliding rod 43 is a smooth arc shape, which makes the reciprocating sliding of the sliding rod 43 smooth.

[0039] Example 2

[0040] The method of using a heater for wastewater treatment using the pyrolysis technology of this invention includes the following steps:

[0041] Step 1: Inject the wastewater to be pyrolyzed into the feed inlet 63, and the wastewater enters the inner cavity 2 to await heating treatment. Start the steam pipe 32, so that the heated steam overflows from several vent holes 33 on both sides of the surface of the steam pipe 32, heating the wastewater inside to carry out pyrolysis;

[0042] Step 2: Start the motor 31. The output end of the motor 31 drives the coaxially connected steam pipe 32 to rotate. The steam outlet 33 on the surface of the steam pipe 32 evenly overflows heating steam inside the inner cavity 2, which evenly heats the sewage in the inner cavity 2.

[0043] Step 3: During the rotation of the steam pipe 32, the protrusions 34 on the surface of the steam pipe 32 will contact the sliding rods 43 on the upper and lower sides. During the contact process, the corresponding sliding rods 43 are subjected to the action of the protrusions 34 and the return spring 45, and will slide up and down within the limiting rod 41 or the limiting plate 42. At the same time, the rotating plates 46 on both sides of the mounting plate 44 will expand in the solution, thereby causing the nearby liquid to gather near the steam pipe 32. At the same time, it will also provide a certain barrier to the heating steam overflowing from the steam pipe 32, so that the heating steam stays in the vicinity for a longer time and increases the heating efficiency.

[0044] Step 4: Heating steam is generated, and the air pressure inside the inner cavity 2 increases. The heating steam and the gas after the pyrolysis of the wastewater will move into the upper gas collection port 61 through the filter screen 5. The high-temperature gas enters the preheating pipe 64 from the gas collection port 61 through the air pipe 62, thereby preheating the temperature inside the preheating pipe 64. When wastewater is put into the feed port 63, the preheating pipe 64 will preheat the wastewater and increase the efficiency of the subsequent pyrolysis of the wastewater.

[0045] Step 5: When the steam pipe 32 rotates, several actuating blocks 35 set in the middle of the steam pipe 32 will contact the lower mesh surface of the filter screen 5. The length of the actuating blocks 35 gradually decreases from the center to both sides. The actuating block 35 in the center actuates the mesh surface significantly, while the actuating blocks 35 on both sides actuate the mesh surface slightly to adapt to the deformation of the mesh surface and shake the mesh surface, so as to clear the debris blocking the mesh surface.

[0046] The working principle of this invention: The pyrolysis technology of this invention is used to treat wastewater using a heater. A heating structure 3 is provided, and heating steam overflows from the vent 33 on the surface of the steam pipe 32 of the heating structure 3, heating the wastewater in the inner cavity 2 to achieve pyrolysis. A motor 31 drives the steam pipe 32 to rotate, ensuring uniform heating of the steam. Simultaneously, it drives the subsequent stirring structure 4 for transmission and cleaning the surface of the filter screen 5. The stirring structure 4 has a sliding rod 43 that slides back and forth on the upper and lower surfaces of the steam pipe 32, causing the rotating plate 46 to open and close during sliding. This draws the nearby solution towards the steam pipe 32, while the rotating plate 46 also blocks the overflowing heating steam, ensuring that the heating steam... The extended residual time further enhances the thermal decomposition efficiency of the heating steam on the wastewater. By installing a preheating pipe 64, the generation of heating steam in the inner cavity 2 increases the gas pressure within the inner cavity 2. The heating steam and generated gas pass through the preheating pipe 64, thereby raising its temperature. When wastewater is fed in from the inlet 63, the preheating pipe 64 preheats the wastewater, reducing the subsequent thermal decomposition reaction time and improving heating efficiency. A filter screen 5 filters the passing wastewater and gas. During the rotation of the steam pipe 32, the agitator block 35 on the surface of the steam pipe 32 agitates the mesh surface of the filter screen 5, causing it to shake and clear residue from the mesh surface. The brush 36 connected to the agitator block 35 cleans the lower mesh surface of the filter screen 5.

[0047] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A heater for treating wastewater using pyrolysis technology, comprising a housing (1), wherein the housing (1) has an inner cavity (2), an inlet (63) is provided at the top of the inner cavity (2), and an outlet pipe (72) is provided at the bottom of the inner cavity (2); characterized in that, A heating structure (3) is provided inside the inner cavity (2). The heating structure (3) includes a steam pipe (32). The steam pipe (32) is rotatably connected inside the box body (1). Several air outlets (33) are provided on both sides of the surface of the steam pipe (32). Protrusions (34) are provided on both sides of the surface of the steam pipe (32). Several actuating blocks (35) are provided at the center of the surface of the steam pipe (32). A brush (36) is provided at one end of the actuating block (35). Agitation structures (4) are provided on the upper and lower sides of the steam pipe (32), and the agitation structures (4) include: Two limiting rods (41) are set on both sides below the steam pipe (32); Two limiting plates (42) are set on both sides above the steam pipe (32), and a filter screen (5) is set between the two limiting plates (42); A sliding rod (43) is located in a slidable limiting connection within a limiting rod (41) or a limiting plate (42). A mounting plate (44) is provided at one end of the sliding rod (43) away from the steam pipe (32). The mounting plate (44) is elastically connected to the limiting rod (41) or the limiting plate (42). Two rotating plates (46) are rotatably provided on both sides of the mounting plate (44). An air collection port (61) is provided at the top of the inner cavity (2), a preheating pipe (64) is provided on the surface of the inlet (63) of the box body (1), the air collection port (61) is connected to the preheating pipe (64), and an outlet (71) is provided at the bottom of the inner cavity (2), the outlet (71) is connected to the outlet pipe (72).

2. The heater for treating wastewater using pyrolysis technology according to claim 1, characterized in that, A reset spring (45) is provided between the mounting plate (44) and the limiting rod (41) and the limiting plate (42), and the reset spring (45) is sleeved on the surface of the sliding rod (43).

3. The heater for treating wastewater using pyrolysis technology according to claim 1, characterized in that, The steam pipe (32) is arranged horizontally inside the inner cavity (2).

4. The heater for treating wastewater using pyrolysis technology according to claim 1, characterized in that, One end of the limiting rod (41) is connected to the inner walls on both sides of the inner cavity (2), and the three sides of the limiting plate (42) are fixedly connected to the inner wall of the inner cavity (2).

5. The heater for treating wastewater using pyrolysis technology according to claim 1, characterized in that, Several toggle blocks (35) have a length that gradually decreases from the center to both sides.

6. The heater for treating wastewater using pyrolysis technology according to claim 1, characterized in that, The air collection port (61) is a trapezoid with a narrow top and a wide bottom, and the discharge port (71) is a trapezoid with a wide top and a narrow bottom.

7. The heater for treating wastewater using pyrolysis technology according to claim 1, characterized in that, A valve (73) is installed inside the discharge pipe (72).

8. The heater for treating wastewater using pyrolysis technology according to claim 1, characterized in that, The side of the protrusion (34) that contacts the sliding rod (43) is a smooth arc.

9. The heater for treating wastewater using pyrolysis technology according to claim 1, characterized in that, A motor (31) is installed on the outer surface of the housing (1), and the output end of the motor (31) is coaxially connected to the steam pipe (32).

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