An in-line reactor

Abstract

This invention discloses a sequential reaction vessel, belonging to the field of sewage treatment technology, to solve at least one of the following problems in existing technologies: poor heat and mass transfer of sewage within the reaction vessel, poor mass and heat transfer of sewage, easy scaling on the vessel wall, and poor reaction effect and treatment efficiency. The sequential reaction vessel of this invention includes a reaction vessel and multiple agitators disposed within the reaction vessel, evenly arranged along the circumference of the reaction vessel. Each agitator includes a stirring shaft and flat blades. The fixed end of the flat blade is connected to the stirring shaft, and the other end of the flat blade is suspended. The upper surface of the flat blade is horizontal, and the lower surface of the flat blade is inclined upwards from the fixed end to the suspended end. This invention can be used for sewage treatment.

Description

Technical Field

[0001] This invention belongs to the field of sewage treatment technology, and particularly relates to a sequencing reactor. Background Technology

[0002] In the treatment of sewage, for sewage with high solid content, the mass and heat transfer of sewage in the reactor is crucial to the reaction effect and treatment efficiency.

[0003] In the prior art, in order to promote mass and heat transfer of sewage in the reactor, a stirring component is usually set at the center of the reactor.

[0004] However, if the stirring component is only placed in the center of the reactor, the sewage in the peripheral areas far from the center cannot be effectively stirred and will always remain in a relatively static state. On the one hand, this will lead to poor heat transfer efficiency of the sewage and uneven internal reaction rate, reducing the processing progress. On the other hand, the sewage deposited at the edge is also prone to scaling on the reactor wall, which will not only increase the stirring resistance and energy consumption, but also affect the heat exchange efficiency of the reactor. Summary of the Invention

[0005] In view of the above analysis, the present invention aims to provide a sequential reaction vessel to solve at least one of the following problems in the prior art: poor heat and mass transfer of fecal matter in the reaction vessel, poor mass and heat transfer of fecal matter, easy scaling on the vessel wall, and poor reaction effect and treatment efficiency.

[0006] The objective of this invention is mainly achieved through the following technical solutions: The present invention provides a sequential reaction vessel, including a reaction vessel and a stirrer disposed inside the reaction vessel. The number of stirrers is multiple and the multiple stirrers are evenly arranged along the circumference of the reaction vessel. The agitator includes a stirring shaft and a flat blade. The fixed end of the flat blade is connected to the stirring shaft, and the other end of the flat blade is suspended. The upper surface of the flat blade is set horizontally, and the lower surface of the flat blade is inclined upward from the fixed end to the suspended end of the flat blade.

[0007] Furthermore, a through hole is opened at the top of the reactor, and the stirring shaft and plate blades pass through the through hole and are connected to the hole wall.

[0008] Furthermore, the stirrer is hinged to the wall of the through hole via a first ball joint structure.

[0009] Furthermore, the sequential reaction vessel also includes a rotary motor, a reciprocating motor, a splined shaft, a splined sleeve, and a second ball joint structure. One end of the splined sleeve is fitted onto the output shaft of the rotary motor and is fixedly connected to the output shaft. The other end of the splined shaft is fitted onto the splined shaft and is fixedly connected to the top end of the stirring shaft. The output shaft of the reciprocating motor is hinged to the stirring shaft through the second ball joint structure.

[0010] Furthermore, the spline shaft and spline sleeve have a radial clearance.

[0011] Furthermore, the sequential reaction vessel also includes a guide rod disposed inside the reaction vessel, with an arc-shaped guide groove on the guide rod, and the bottom of the stirring shaft inserted into the guide groove.

[0012] Furthermore, the guide rod is arranged radially along the reactor, and the center of the guide groove coincides with the center of the ball joint structure.

[0013] Furthermore, the sequential reactor also includes a top annular cavity, a bottom annular cavity, a top connecting section, a main heating section, and a bottom connecting section, which are connected sequentially from top to bottom.

[0014] Furthermore, there are multiple main heating sections, with the stirrer and the main heating section being set alternately at intervals.

[0015] Furthermore, multiple permeable micropores are opened on the tube wall of the main heating section, allowing water vapor to be directly sprayed into the sewage inside the reactor.

[0016] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects: A) The sequential reactor provided by this invention has multiple circumferentially arranged agitators that can drive the flow of fecal matter near the inner wall of the reactor, solving the problem that the fecal matter at the edge cannot be stirred when only the agitator is set in the center. This allows the fecal matter in all parts of the reactor to be effectively disturbed, which not only makes the reaction rate of the fecal matter more uniform, but also prevents the fecal matter from depositing and forming scale on the reactor wall, reduces stirring resistance, reduces energy consumption, and ensures stable heat exchange efficiency of the reactor.

[0017] B) The sequential reactor provided by this invention features an inclined end face structure design of flat blades. After the dry manure is submerged in the flat blades, it will flow upward in the gap between the flat blades and the reactor wall, and simultaneously flow downward in the gap between the flat blades, forming vertical disturbance and backflow. This allows the dry manure to come into contact with the same blade multiple times, generating mixed flow in the vertical direction, breaking the stratification, promoting the exchange of manure at different heights, further improving the uniformity of mass and heat transfer, and effectively improving the overall reaction rate and treatment efficiency of manure.

[0018] C) The sequential reaction vessel provided by this invention adopts this driving structure. The rotating motor can drive the stirring shaft to rotate around its own axis through the cooperation of the spline sleeve and the spline shaft to realize the stirring operation. At the same time, the reciprocating motor can reciprocate to drive the stirring shaft. With the cooperation of the first ball joint structure and the second ball joint structure, the stirring shaft can drive the flat blade to oscillate back and forth within a certain angle range with the first ball joint structure as the origin. Thus, stirring rotation and oscillation disturbance can be realized at the same time. The disturbance range can be increased without modifying the stirring structure, further improving the mass and heat transfer effect. Moreover, the spline cooperation can adapt to the change of the top position of the stirring shaft and will not cause jamming.

[0019] D) The sequential reactor provided by this invention allows the heating medium to flow sequentially through the top annular cavity, the top connecting section, the main heating section, the bottom connecting section, and the bottom annular cavity, achieving uniform heating of manure at different heights inside the reactor. Compared to structures that only have a jacketed heating system outside the reactor, the main heating section extends into the reactor, directly heating the manure inside, reducing heat loss along the heat transfer path. At the same time, it ensures that the manure in the center and edge areas of the reactor receives sufficient heat, further improving temperature uniformity, ensuring a consistent reaction rate for manure everywhere, and improving overall treatment efficiency.

[0020] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages may become apparent from the description or be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained from what is particularly pointed out in the description and drawings. Attached Figure Description

[0021] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0022] Figure 1 This is a schematic diagram of the structure of the sequential reaction vessel provided in Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the structure of the sequential reaction vessel provided in Embodiment 2 of the present invention; Figure 3 This is a schematic diagram showing the connection of the first ball joint structure, the rotating motor, the reciprocating motor, the splined shaft, the splined sleeve, and the second ball joint structure in the sequential reaction vessel provided in Embodiment 2 of the present invention. Figure 4 This is a top view of the sequential reaction vessel provided in Embodiment 2 of the present invention, showing only some key components; Figure 5 This is a schematic diagram showing the detachable flat plate blades and stirring shaft in the sequential reaction vessel provided in Embodiment 2 of the present invention; Figure 6 This is a schematic diagram of the structure of the sequential reaction vessel provided in Embodiment 3 of the present invention.

[0023] Figure label: 1-Reaction vessel; 101-Edge fixing ring; 102-Central rotating cover; 2-Stirring shaft; 3-Flat plate blade; 4-First ball joint structure; 5-Rotating motor; 6-Reciprocating motor; 7-Splined shaft; 8-Splined sleeve; 9-Second ball joint structure; 10-Guide rod; 11-Central rotating shaft; 12-Central fixing plate; 13-Central drive motor; 14-First clamping plate; 15-Second clamping plate; 16-Top annular cavity; 17-Bottom annular cavity; 18-Top connecting section; 19-Main heating section; 20-Bottom connecting section. Detailed Implementation

[0024] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0025] Example 1 This embodiment provides a sequencing reactor, see [link / reference] Figure 1 It includes a vessel body 1 and a stirrer disposed inside the vessel body 1. The number of stirrers is multiple and the multiple stirrers are evenly arranged along the circumference of the vessel body 1.

[0026] The agitator includes a stirring shaft 2 and a flat blade 3. The fixed end of the flat blade 3 is connected to the stirring shaft 2, and the other end of the flat blade 3 is suspended. The upper surface of the flat blade 3 is set horizontally, and the lower surface of the flat blade 3 is inclined upward from the fixed end to the suspended end of the flat blade 3.

[0027] Compared with the prior art, the sequential reactor provided in this embodiment has the advantage that multiple circumferentially arranged agitators can drive the flow of fecal matter near the inner wall of the reactor body 1, solving the problem that the fecal matter at the edge cannot be stirred when only the agitator is set in the center. This allows the fecal matter in all parts of the reactor body 1 to be effectively disturbed, which not only makes the reaction rate of the fecal matter more uniform, but also prevents the fecal matter from depositing and forming scale on the reactor wall, reduces stirring resistance, reduces energy consumption, and ensures stable heat exchange efficiency of the reactor body 1.

[0028] On the other hand, the inclined end face structure design of the flat plate blade 3 allows the dry manure to flow upward in the gap between the flat plate blade 3 and the vessel wall after being submerged in the flat plate blade 3. At the same time, it flows downward in the gap between the flat plate blade 3, forming vertical disturbance and backflow. This allows the dry manure to come into contact with the same blade multiple times, generating mixed flow in the vertical direction, breaking the stratification, promoting the exchange of manure at different heights, further improving the uniformity of mass and heat transfer, and effectively improving the overall reaction rate and treatment efficiency of manure.

[0029] For example, the lower end face of the flat blade 3 is tilted at an angle of 15° to 19° relative to the horizontal direction. In this way, by setting the tilt angle, the mixing effect is not too obvious due to the tilt angle being too small, nor is the resistance during the stirring process increased due to the tilt angle being too large. This allows for control of stirring energy consumption while ensuring the mixing effect.

[0030] Correspondingly, the ratio of the length of the flat blade 3 to the inner diameter of the vessel body 1 is 1:8 to 1:10, and the ratio of the distance between two adjacent flat blades 3 to the inner diameter of the vessel body 1 in the vertical direction is 1:8 to 1:10. This is because if the ratio is too large, the distance between adjacent flat blades 3 will be too large, resulting in insufficient vertical mixing. At the same time, it will also increase the gap between the blades and the vessel wall, making it impossible to effectively drive the flow of sewage in the edge area. If the ratio is too small, it will result in too many blades in the vessel body 1, increasing the total resistance during the stirring process, increasing energy consumption, and also increasing the manufacturing cost of the vessel body 1. By setting the above ratio range, it is possible to control the stirring energy consumption and manufacturing cost while ensuring the disturbance and mixing effect, thus balancing the treatment effect and operating cost.

[0031] Example 2 This embodiment provides a sequencing reactor, see [link / reference] Figure 2 Its structure is basically the same as the sequencing reactor provided in Example 1, the difference being: Understandably, in order to allow the stirrer to be placed into the vessel body 1, a through hole is made at the top of the vessel body 1. The stirring shaft 2 and the flat blade 3 pass through the through hole and are connected to the hole wall, thereby enabling the installation of the stirrer.

[0032] To further address the insufficient mass and heat transfer of the dried manure within the vessel body 1, the aforementioned agitator is hinged to the wall of the through hole via a first ball joint structure 4. This first ball joint structure 4 allows the agitator to not only rotate around its own stirring shaft 2 but also to oscillate within a certain angle during rotation, further expanding the range of stirring disturbance and more effectively disrupting the static stratification of the dried manure, thereby improving mass and heat transfer efficiency.

[0033] Furthermore, to simultaneously address the issues of rotation and oscillation of the agitator, the aforementioned sequential reaction vessel also includes a rotary motor 5, a reciprocating motor 6, a splined shaft 7, a splined sleeve 8, and a second ball joint structure 9. One end of the splined sleeve 8 is fitted onto and fixedly connected to the output shaft of the rotary motor 5, and the other end of the splined shaft 7 is fitted onto the splined shaft 2. It should be noted that the splined shaft 7 and the splined sleeve 8 have a radial clearance to accommodate the horizontal displacement generated by the oscillation of the agitator shaft 2. The splined shaft 7 is fixedly connected to the top end of the agitator shaft 2. The output shaft of the reciprocating motor 6 is hinged to the agitator shaft 2 via the second ball joint structure 9. (See [reference needed]). Figure 3In this way, with this drive structure, the rotary motor 5 can drive the stirring shaft 2 to rotate around its own axis through the spline sleeve 8 and the spline shaft 7, thus realizing the stirring operation; at the same time, the reciprocating motor 6 can reciprocate to drive the stirring shaft 2, and with the cooperation of the first ball joint structure 4 and the second ball joint structure 9, the stirring shaft 2 can drive the flat blade 3 to oscillate back and forth within a certain angle range with the first ball joint structure 4 as the origin, thereby realizing stirring rotation and oscillation disturbance at the same time. The disturbance range can be increased without modifying the stirring structure, further improving the mass and heat transfer effect. Moreover, the spline cooperation can adapt to the change of the top position of the stirring shaft 2 without the problem of jamming.

[0034] Furthermore, to address the issue of shaking during the oscillation of the stirring shaft 2, the aforementioned sequential reaction vessel also includes a guide rod 10 disposed within the vessel body 1. The guide rod 10 has an arc-shaped guide groove, into which the bottom of the stirring shaft 2 is inserted. (See [reference]). Figure 4 In this way, by guiding and limiting the bottom of the stirring shaft 2 through the guide groove, it will not hinder the stirring shaft 2 from swinging along the preset trajectory, and it can also reduce excessive shaking of the stirring shaft 2 during the swinging process, ensuring the stability of the stirring process and reducing unnecessary vibration and wear.

[0035] For example, the guide rod 10 is arranged radially along the vessel body 1, and the center of the guide groove coincides with the center of the ball of the first ball hinge structure 4, which can further ensure smooth guiding process and more stable swing process.

[0036] Furthermore, in order to further address the problem of insufficient disturbance of fecal matter within the vessel body 1, the aforementioned sequential reaction vessel also includes a central rotating shaft 11, a central fixed disk 12, and a central drive motor 13. The vessel body 1 includes a vessel body and a vessel cover. The vessel cover is divided into an edge fixing ring 101 and a central rotating cover 102 located within the edge fixing area. The central fixed disk 12 is fitted onto one end of the central rotating shaft 11 and is fixedly connected to the central rotating shaft 11. The other end of the central rotating shaft 11 passes through the central rotating cover 102 and is fixedly connected to the output shaft of the central drive motor 13. The central rotating shaft 11 is fixedly connected to the central rotating cover 102. A central fixing groove is formed on the central fixed disk 12, and the fixing groove is connected to the guide groove, but the two are not connected.

[0037] It should be noted that the stirring shaft 2 is mounted on the central rotating cover 102.

[0038] Accordingly, the sequential reaction vessel of this embodiment has an edge stirring mode and a center stirring mode.

[0039] In the initial stage of the reaction, the reaction efficiency is the primary consideration. At this time, the sequence reactor is in the central stirring mode. The bottom end of the stirring shaft 2 is inserted into the central fixed groove. The central drive motor 13 is turned on. The central drive motor 13 drives the central shaft 11, the central fixed plate 12, the central rotating cover 102, and multiple stirring shafts 2 to rotate simultaneously. The stirring shafts 2 and the flat blades 3 concentrate on stirring the dry manure in the central area of ​​the reactor body 1, promoting the hydrothermal pyrolysis reaction of the dry manure in the central area.

[0040] As the reaction proceeds, the reaction rate takes precedence. At this point, the central drive motor 13 is turned off, and the sequential reactor is in edge stirring mode. The reciprocating motor 6 is turned on, driving the bottom end of the stirring shaft 2 to move from the central fixed groove to the guide groove, and then to the end of the guide groove away from the central fixed groove. At this point, the reciprocating motor 6 is turned off, and the rotary motor 5 is turned on. Each rotary motor 5 drives the corresponding stirring shaft 2 and plate blade 3 to stir the dry manure at the inner edge of the reactor body 1, promoting the hydrothermal pyrolysis reaction of the dry manure in the edge area.

[0041] During this process, the reciprocating motor 6 is turned on, causing the bottom end of the stirring shaft 2 to move within the guide groove, thereby causing the stirring shaft 2 to swing as a whole.

[0042] In this way, the stirring area is adjusted according to the different stages of the reaction. In the early stage of the reaction, the central area is concentrated with manure and sewage, so the central area is stirred first to ensure the mass and heat transfer efficiency of the central area and speed up the reaction start-up. After the reaction has progressed to a certain extent, the stirring is then turned to the edge area to solve the problem of insufficient reaction of manure and sewage in the edge area. This not only improves the overall treatment efficiency, but also reduces unnecessary power consumption and further reduces operating costs.

[0043] Furthermore, in order to solve the problem of the need to replace the entire agitator due to damage caused by long-term use of the flat blades 3, the flat blades 3 and the agitator shaft 2 are detachably connected.

[0044] Specifically, the aforementioned stirrer also includes a first clamping plate 14 and a second clamping plate 15. The first clamping plate 14 and the second clamping plate 15 are fixedly connected to the stirring shaft 2. The first clamping plate 14 and the second clamping plate 15 have a gap, into which one end of the flat blade 3 is inserted. The first clamping plate 14, the stirring blade, and the second clamping plate 15 are detachably connected by connecting bolts. (See [link]) Figure 5 In this way, when a single flat blade 3 becomes worn or damaged, it is only necessary to loosen the connecting bolts and remove the damaged flat blade 3 from the gap between the first clamping plate 14 and the second clamping plate 15 for replacement. There is no need to remove the entire agitator from the vessel body 1 for replacement, which can reduce the cost of equipment maintenance, shorten maintenance downtime, and effectively improve production efficiency.

[0045] Example 3 This embodiment provides a sequencing reactor, see [link / reference] Figure 6 Its structure is basically the same as the sequential reaction vessel provided in Example 1 or Example 2, the difference being: Furthermore, in order to solve the problem of poor temperature uniformity inside the vessel 1, the sequential reactor of this embodiment also includes a top annular cavity 16, a bottom annular cavity 17, a top connecting section 18, a main heating section 19, and a bottom connecting section 20. From top to bottom, the top annular cavity 16, the top connecting section 18, the main heating section 19, the bottom connecting section 20, and the bottom annular cavity 17 are connected in sequence, and the main heating section 19 has a gap with the inner wall of the vessel 1.

[0046] In this heating structure, the heating medium can flow sequentially through the top annular cavity 16, the top connecting section 18, the main heating section 19, the bottom connecting section 20, and the bottom annular cavity 17, achieving uniform heating of the fecal sludge at different heights inside the vessel body 1. Compared to a structure that only sets a jacket for heating outside the vessel body, the main heating section 19 extends into the interior of the vessel body 1, which can directly heat the fecal sludge inside, reducing heat loss along the heat transfer path. At the same time, it allows the fecal sludge in the center and edge areas of the vessel body 1 to receive sufficient heat, further improving temperature uniformity, ensuring a consistent reaction rate for the fecal sludge in all areas, and improving overall treatment efficiency.

[0047] To further address the issue of heating uniformity, multiple main heating sections 19 are used, with agitators and main heating sections 19 arranged alternately. This alternating arrangement allows the heat from the main heating sections 19 to be rapidly transferred to various parts of the vessel body 1 by the stirred and disturbed manure, further improving temperature uniformity. At the same time, the main heating sections 19 also provide some obstruction to the flowing manure, further disrupting the stable stratification of the manure and enhancing mass and heat transfer.

[0048] It should be noted that the position of the outer edge of the stirrer needs to be determined according to the position of the main heating section 19, so as to ensure that when the vessel body 1 is in the central stirring mode, the stirrer does not interfere with the main heating section 19 during rotation.

[0049] Furthermore, multiple permeable micropores are opened on the tube wall of the main heating section 19, allowing water vapor to be directly injected into the manure inside the vessel 1 through the permeable micropores to directly heat the manure. At the same time, the manure can be further disturbed by bubbling, thereby promoting mass and heat transfer and improving reaction efficiency.

[0050] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A sequence reaction vessel, characterized in that, It includes a reaction vessel and a stirrer disposed inside the reaction vessel, wherein there are multiple stirrers, and the multiple stirrers are evenly arranged along the circumference of the reaction vessel; The stirrer includes a stirring shaft and a flat blade. The fixed end of the flat blade is connected to the stirring shaft, and the other end of the flat blade is suspended. The upper surface of the flat blade is horizontal, and the lower surface of the flat blade is inclined upward from the fixed end to the suspended end of the flat blade.

2. The sequencing reactor according to claim 1, characterized in that, A through hole is provided at the top of the reactor, and the stirring shaft and the flat blade pass through the through hole and are connected to the hole wall.

3. The sequencing reactor according to claim 2, characterized in that, The stirrer is hinged to the wall of the through hole via a first ball joint structure.

4. The sequencing reactor according to claim 3, characterized in that, The sequential reaction vessel also includes a rotary motor, a reciprocating motor, a splined shaft, a splined sleeve, and a second ball joint structure. One end of the splined sleeve is fitted onto the output shaft of the rotary motor and is fixedly connected to the output shaft. The other end of the splined shaft is fitted onto the splined shaft. The splined shaft is fixedly connected to the top end of the stirring shaft. The output shaft of the reciprocating motor is hinged to the stirring shaft through the second ball joint structure.

5. The sequencing reactor according to claim 4, characterized in that, The splined shaft and splined sleeve have a radial clearance.

6. The sequencing reactor according to claim 4, characterized in that, The sequential reaction vessel also includes a guide rod disposed inside the reaction vessel, and an arc-shaped guide groove is formed on the guide rod, with the bottom of the stirring shaft inserted into the guide groove.

7. The sequencing reactor according to claim 6, characterized in that, The guide rod is arranged radially along the reactor, and the center of the guide groove coincides with the center of the first ball joint structure.

8. The sequential reaction vessel according to any one of claims 1 to 7, characterized in that, The sequential reactor further includes a top annular cavity, a bottom annular cavity, a top connecting section, a main heating section, and a bottom connecting section, which are connected sequentially from top to bottom.

9. The sequencing reactor according to claim 8, characterized in that, There are multiple main heating sections, and the stirrer is alternately arranged with the main heating sections.

10. The sequencing reactor according to claim 8, characterized in that, Multiple permeable micropores are also opened on the pipe wall of the main heating section, and water vapor is directly sprayed into the sewage inside the reactor through the permeable micropores.

Images