Spent catalyst slurry dewatering treatment apparatus

Abstract

This utility model discloses a waste catalyst sludge dewatering treatment device, relating to the field of waste catalyst sludge dewatering technology. Specifically, it includes a screw press dewatering machine body, a hollow plate, a preheating structure, and a drying structure. The discharge end of the screw press dewatering machine body and the feed end of the preheating structure are both located within the inner cavity of the hollow plate, with the feed end of the preheating structure located below the discharge end of the screw press dewatering machine body and above the feed end of the drying structure. The preheating structure includes a first shell, a spiral feeding shaft movably connected to the inner cavity of the first shell, and a humidity sensor mounted on the spiral feeding shaft. The drying structure dries the sludge cake after preliminary dewatering, improving the waste catalyst sludge dewatering effect. Furthermore, the working effect of the screw press dewatering machine body can be monitored, allowing operators to understand the working status of the screw press dewatering machine body in real time for timely maintenance.

Description

Technical Field

[0001] This utility model relates to the field of waste catalyst sludge dewatering technology, specifically waste catalyst sludge dewatering treatment equipment. Background Technology

[0002] Catalytic cracking units in oil refineries are one of the main processing units for heavy oil. Catalyst consumption and replacement are one of the main operating characteristics of this unit. Normally, fresh catalyst is consumed at a rate of 0.6-1.4 kg / t of feedstock, while 0.3-0.6 kg / t of catalyst is lost to the atmosphere through the chimney. With increasingly stringent national environmental regulations, the emission indicators of SO2, NOx, and dust content from catalytic cracking unit chimneys are strictly controlled. Both domestically and internationally, flue gas desulfurization and denitrification technologies are being adopted to meet emission requirements. Currently, catalytic cracking units mainly use wet desulfurization technology. When using wet desulfurization, the dust content in the chimney reaches below 50 mg / m³. The catalyst recovered from washing enters the wastewater system. After sedimentation and concentration in the clarifier, the water content is above 99%, and it is in a flowing state, requiring dehydration treatment. In related technologies, the screw press sludge dewatering machine is one of the commonly used devices for dewatering waste catalyst sludge. However, the moisture content of the sludge cake after dewatering by the screw press is generally between 75% and 85%, which is still relatively high and increases the difficulty of subsequent treatment of the sludge cake. Moreover, due to equipment wear, the dewatering effect will be affected. Based on this, this application proposes a waste catalyst sludge dewatering treatment device. Utility Model Content

[0003] This invention provides a waste catalyst sludge dewatering treatment device, which solves the problem mentioned in the background art that when using a screw press dewatering machine for dewatering, the sludge cake has a high moisture content; and the dewatering effect is affected by equipment wear.

[0004] This utility model provides the following technical solution: a waste catalyst sludge dewatering treatment equipment, including a screw press dewatering machine body, a hollow plate, a preheating structure, and a drying structure. The discharge end of the screw press dewatering machine body and the feed end of the preheating structure are both located inside the cavity of the hollow plate. The feed end of the preheating structure is located below the discharge end of the screw press dewatering machine body, and the discharge end of the preheating structure is located above the feed end of the drying structure.

[0005] The preheating structure includes a first shell, a spiral feeding shaft movably connected to the inner cavity of the first shell, and a humidity sensor mounted on the spiral feeding shaft. The shell wall of the first shell is hollow, a hot fluid inlet pipe is provided at the top of the shell wall, and a liquid outlet channel is provided at the bottom of the shell wall. The inner cavity of the first shell wall is connected to the top of the filtrate collection chamber of the screw press dewatering machine body through the liquid outlet channel.

[0006] The drying structure includes a second shell, an inner cylinder fixed inside the second shell, a feed hopper, a rotating shaft located in the middle of the inner cylinder, a heating cylinder fixed on the outer ring of the rotating shaft, and spiral blades connected to the outer ring of the heating cylinder. A steam flow chamber is formed between the inner wall of the second shell and the inner cylinder. A steam discharge pipe is provided at the top of the steam flow chamber, and the other end of the steam discharge pipe is connected to the other end of the hot fluid inlet pipe.

[0007] Preferably, the top of the inner cylinder away from the feed hopper is uniformly provided with steam passage holes.

[0008] Preferably, the feed hopper is located below the discharge end of the preheating structure, and the drying structure further includes a discharge pipe located on the side of the feed hopper away from the preheating structure.

[0009] Preferably, a servo motor is fixedly connected to one end of the second housing, and the end of the output shaft of the servo motor is fixedly connected to the end of the rotating shaft.

[0010] Preferably, a second servo motor is provided at one end of the first housing, and the end of the output shaft of the second servo motor is fixedly connected to the end of the screw feeding shaft.

[0011] Preferably, the liquid outlet channel is inclined, and the hot fluid inlet pipe is located at the high end of the liquid outlet channel.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. This waste catalyst sludge dewatering treatment equipment dries the sludge cake after preliminary dewatering through a drying structure, thereby improving the dewatering effect of the waste catalyst sludge. It can also monitor the working effect of the screw press dewatering machine, allowing staff to understand the working status of the screw press dewatering machine in real time, so as to carry out timely maintenance of the screw press dewatering machine.

[0014] 2. The waste catalyst sludge dewatering treatment equipment, through the setting of a preheating structure, steam discharge pipe and hot fluid inlet pipe, allows the hot steam generated during the sludge drying process to preheat the sludge cake in the preheating structure, recover the heat in the hot steam, save energy, shorten the sludge cake drying time, and improve the working efficiency of the dewatering treatment equipment. Attached Figure Description

[0015] Figure 1 This is a front view of the structure of this utility model;

[0016] Figure 2 The structure of this utility model Figure 1 The diagram on the right;

[0017] Figure 3 This is a schematic cross-sectional view of the drying structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the surface of the preheating structure of this utility model;

[0019] Figure 5 This is a schematic cross-sectional view of the first shell of the present invention.

[0020] In the diagram: 1. Main body of the screw press dewatering machine; 2. Hollow plate; 3. First shell; 4. Second shell; 5. Steam exhaust pipe; 6. Servo motor one; 7. Discharge pipe; 8. Feed hopper; 9. Screw feeding shaft; 10. Hot fluid inlet pipe; 11. Rotating shaft; 12. Heating cylinder; 13. Screw blades; 14. Servo motor two; 15. Liquid outlet channel; 16. Inner cylinder; 17. Steam flow chamber; 18. Humidity sensor. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] This utility model provides an embodiment: Please refer to Figure 1-5 Waste catalyst sludge dewatering equipment includes a screw press dewatering machine body 1, a hollow plate 2, a preheating structure, and a drying structure. The screw press dewatering machine body 1 is existing technology. In some embodiments of this application, the screw press dewatering machine body 1 is disclosed by the authorized patent application number CN201720707897.0. The preheating structure is connected to the screw press dewatering machine body 1 through the hollow plate 2. The discharge end of the screw press dewatering machine body 1 and the feed end of the preheating structure are both located in the inner cavity of the hollow plate 2, and the feed end of the preheating structure is located below the discharge end of the screw press dewatering machine body 1. With this configuration, the sludge cake generated after dewatering by the screw press dewatering machine body 1 can fall into the inner cavity of the preheating structure under the action of gravity.

[0023] The preheating structure includes a first housing 3 connected to the hollow plate 2, a spiral feeding shaft 9 movably connected to the inner cavity of the first housing 3, and a humidity sensor 18 set on the spiral feeding shaft 9. The humidity sensor 18 can detect the humidity of the mud cake, and the working efficiency of the screw press dewatering machine can be determined based on the humidity of the mud cake. A servo motor 14 is provided at one end of the first housing 3. The output shaft end of the servo motor 14 is fixedly connected to the end of the spiral feeding shaft 9 through a reducer. When the servo motor 14 is working, it can drive the spiral feeding shaft 9 connected to it to rotate. When the spiral feeding shaft 9 rotates, it can transport the mud cake located in the inner cavity of the first housing 3. The mud cake can be discharged through the discharge end of the preheating structure. The discharge end of the preheating structure is located above the feed end of the drying structure, and the mud cake can fall into the inner cavity of the drying structure.

[0024] The drying structure has a feed hopper 8 at one end near the first housing 3 and a discharge pipe 7 at the bottom of the other end. The discharge pipe 7 is located on the side of the feed hopper 8 away from the preheating structure. The drying structure includes a second housing 4. An inner cylinder 16 is fixedly connected to the inner cavity of the second housing 4. A rotating shaft 11 is movably connected to the middle of the inner cavity of the inner cylinder 16. A heating cylinder 12 is fixedly connected to the outer ring of the rotating shaft 11. A spiral blade 13 is fixedly connected to the outer ring of the heating cylinder 12. A servo motor 6 is fixedly connected to one end of the second housing 4. The output shaft of the servo motor 6 is fixedly connected to the end of the rotating shaft 11 through a reducer. With the servo motor 6, the rotation of the servo motor 6 can drive the rotating shaft 11 connected to it to rotate. When the rotating shaft 11 rotates, it can drive the spiral blade 13 to rotate. The spiral blade 13 can drive the mud cake that falls into the second housing 4 through the feed hopper 8 to move. During the movement of the mud cake, the heat generated by the heating cylinder 12 is turned on to dry the mud cake. The dried mud cake is discharged through the discharge pipe 7.

[0025] A steam flow chamber 17 is formed between the inner cylinder 16 and the inner wall of the second shell 4. The top of the inner cylinder 16 away from the feed hopper 8 is uniformly provided with steam through holes. The water vapor generated when the mud cake is heated enters the inner cavity of the steam flow chamber 17 through the steam through holes. The top of the steam flow chamber 17 is provided with a steam discharge pipe 5. The shell wall of the first shell 3 is in a hollow state. The top of the shell wall of the first shell 3 is provided with a hot fluid inlet pipe 10. The other end of the steam discharge pipe 5 is connected to the other end of the hot fluid inlet pipe 10. The bottom of the shell wall of the first shell 3 is provided with a liquid outlet channel 15. The inner cavity of the shell wall of the first shell 3 is connected to the top of the filtrate collection chamber of the screw press dewatering machine body 1 through the liquid outlet channel 15. The steam generated by heating enters the hot fluid inlet pipe 10 through the steam discharge pipe 5. The steam preheats the mud cake in the preheating structure, improves the drying speed of the mud cake, and saves energy. The condensate generated by the steam heat release flows into the filtrate collection chamber of the screw press dewatering machine body 1 through the liquid outlet channel 15.

[0026] The liquid outlet channel 15 is inclined, and the hot fluid inlet pipe 10 is located at the high end of the liquid outlet channel 15. This arrangement facilitates the discharge of steam condensate.

[0027] All electrical components involved in this application are prior art. Those skilled in the art understand their connection methods. With the help of those skilled in the art, all electrical components in this application and their compatible power supplies can be connected by wires. According to the actual situation, a suitable controller can be selected to meet the control requirements. For specific connections and control sequences, please refer to the description below. The electrical connection between each electrical component is completed in the order of operation. The detailed connection methods are well known in the art. The following mainly introduces the working principle and process, and will not describe the electrical control.

[0028] In summary: When this waste catalyst sludge dewatering treatment equipment is in use, the existing screw press dewatering machine body 1 is used to perform preliminary dewatering of the waste catalyst sludge. The sludge cake after preliminary dewatering falls into the inner cavity of the preheating structure under gravity. Servo motor 2 14 drives the screw feeding shaft 9 to rotate, and the screw feeding shaft 9 drives the preliminary dewatered sludge cake to move. The sludge cake falls into the inner cavity of the drying structure through the discharge end of the preheating structure and the feed end of the drying structure. Servo motor 1 6 drives the rotating shaft 11 to rotate, and the rotating shaft 11 drives the spiral blades 13 to rotate. The mud cake is moved, and during the movement, the heat emitted by the heating cylinder 12 when it is powered on dries the mud cake. The dried mud cake is discharged through the discharge pipe 7. The steam generated during the drying process enters the inner cavity of the steam flow chamber 17 through the steam through hole. The steam in the steam flow chamber 17 enters the hot fluid inlet pipe 10 through the steam discharge pipe 5. The steam preheats the mud cake in the preheating structure, improves the drying speed of the mud cake, and saves energy. The condensate generated by the steam heat release flows through the liquid outlet channel 15 to the filtrate collection chamber of the screw press dewatering machine body 1.

[0029] The device uses a humidity sensor 18 to monitor the humidity of the mud cake after it has been dehydrated by the screw press dewatering machine body 1. The working quality of the screw press dewatering machine body 1 can be determined based on the humidity of the mud cake. The controller inside the device can promptly notify the staff to inspect and maintain the screw press dewatering machine body 1 based on the detection results.

[0030] All standard parts used in this utility model can be purchased from the market, and irregularly shaped parts can be customized according to the description and drawings. The specific connection methods of each part all adopt conventional means such as bolts that are mature in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art. Although the embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. Waste catalyst sludge dewatering treatment equipment, comprising a screw press dewatering machine body (1), a hollow plate (2), a preheating structure, and a drying structure, characterized in that: The discharge end of the main body (1) of the screw press dewatering machine and the feed end of the preheating structure are both located inside the cavity of the hollow plate (2), and the feed end of the preheating structure is located below the discharge end of the main body (1) of the screw press dewatering machine, and the discharge end of the preheating structure is located above the feed end of the drying structure. The preheating structure includes a first housing (3), a spiral feeding shaft (9) movably connected to the inner cavity of the first housing (3), and a humidity sensor (18) disposed on the spiral feeding shaft (9). The shell wall of the first housing (3) is hollow. A hot fluid inlet pipe (10) is provided at the top of the shell wall of the first housing (3), and a liquid outlet channel (15) is provided at the bottom of the shell wall of the first housing (3). The inner cavity of the shell wall of the first housing (3) is connected to the top of the filtrate collection chamber of the screw press dewatering machine body (1) through the liquid outlet channel (15). The drying structure includes a second shell (4), an inner cylinder (16) fixed inside the second shell (4), a feed hopper (8), a rotating shaft (11) located in the middle of the inner cylinder (16), a heating cylinder (12) fixed on the outer ring of the rotating shaft (11), and a spiral blade (13) connected to the outer ring of the heating cylinder (12). A steam flow chamber (17) is formed between the inner wall of the second shell (4) and the inner cylinder (16). A steam discharge pipe (5) is provided at the top of the steam flow chamber (17), and the other end of the steam discharge pipe (5) is connected to the other end of the hot fluid inlet pipe (10).

2. The waste catalyst sludge dewatering treatment equipment according to claim 1, characterized in that: The top of the inner cylinder (16) away from the feed hopper (8) is uniformly provided with steam passage holes.

3. The waste catalyst sludge dewatering treatment equipment according to claim 1, characterized in that: The feed hopper (8) is located below the discharge end of the preheating structure, and the drying structure also includes a discharge pipe (7), which is located on the side of the feed hopper (8) away from the preheating structure.

4. The waste catalyst sludge dewatering treatment equipment according to claim 1, characterized in that: A servo motor (6) is fixedly connected to one end of the second housing (4), and the end of the output shaft of the servo motor (6) is fixedly connected to the end of the rotating shaft (11).

5. The waste catalyst sludge dewatering treatment equipment according to claim 1, characterized in that: One end of the first housing (3) is provided with a servo motor 2 (14), and the end of the output shaft of the servo motor 2 (14) is fixedly connected to the end of the screw feeding shaft (9).

6. The waste catalyst sludge dewatering treatment equipment according to claim 1, characterized in that: The liquid outlet channel (15) is inclined, and the hot fluid inlet pipe (10) is located at the high end of the liquid outlet channel (15).

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