Tower bottom purging device of spray dryer
By designing the bottom purge device of the spray dryer, the purge gas is used to purge the dead corner area of the tower through the gradually shrinking purge pipeline, the risks of bottom material accumulation and high-temperature oxidation and smolding are solved, and the equipment operation is improved Security.
Patent Information
- Application Number
- CN202421054498.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-15
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-05-15
AI Technical Summary
The bottom bent pipe area of the spray dryer tower is prone to accumulation of materials, resulting in poor transportation and may cause combustion during the drying of specific substances, which poses high safety hazards.
Design a bottom purge device, including a joint pipe fixed at the lowest point of the elbow at the bottom of the dryer, connected with a purge assembly, which includes an intake pipe, a manual valve, a purge pipe and a docking pipe, using blowing The sweeping gas passes through the gradually shrinking purge pipe to purge the dead corners of the tower to ensure that the material is cleaned thoroughly.
It effectively avoids the accumulation of materials at the bottom of the tower, reduces the risk of high-temperature oxidation and improves the safety of equipment operation.
Smart Images
Figure CN222504877U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a tower bottom purge device for a spray dryer, belonging to the technical field of material drying equipment. Background Art
[0002] Spray dryer equipment is used in the material drying process. During the material drying process, there is a bend area at the bottom of the tower. During operation, there is a phenomenon of material accumulation at the bend at the bottom of the tower, which not only affects the transportation of materials, but also in the drying process of some specific materials, the accumulation of materials will generate heat and even cause combustion, posing a very high safety hazard. Utility Model Content
[0003] The utility model aims to provide a spray dryer tower bottom purge device to solve the technical problem of the existing spray dryer tower bottom accumulation of materials leading to great safety hazards.
[0004] The utility model adopts the following technical scheme: a spray dryer tower bottom purge device, which comprises a joint pipe fixed at the lowest point of the dryer tower bottom elbow, the joint pipe is horizontally arranged, a purge assembly is connected to the joint pipe, the purge assembly comprises an air intake pipe, a manual valve, a purge pipe and a docking pipe, the air intake pipe is connected to a purge gas source, an automatic valve is arranged on the air intake pipe, the manual valve is connected between the air intake pipe and the purge pipe, the purge pipe and the docking pipe are both horizontally arranged, the docking pipe is sleeved on the outer periphery of the purge pipe, one end of the docking pipe is fixedly connected to the purge pipe, and the other end is fixedly connected to the joint pipe, one end of the purge pipe is connected to the manual valve, and the other end enters the joint pipe, the purge pipe is gradually contracted from the manual valve to the joint pipe, the end of the purge pipe connected to the manual valve is a round mouth, and the end of the purge pipe entering the joint pipe is a horizontally arranged flat mouth structure.
[0005] The butt joint pipeline is in a gradually expanding conical structure from the manual valve to the joint pipeline.
[0006] An annular connecting plate is provided at the position where the butt joint pipe and the purge pipe are connected to each other, and the butt joint pipe and the purge pipe are fixed together through the annular connecting plate.
[0007] A retaining edge is provided on the upper portion of the flat mouth structure of the purge pipeline.
[0008] One end of the purge pipeline is connected to the manual valve via a thread.
[0009] One end of the air intake pipeline is connected to a purge air source, and the other end is connected to a filter. The filter is connected to the manual valve, and the automatic valve is arranged on the air intake pipeline between the purge air source and the filter.
[0010] The filter is a stainless steel filter, and the purge gas source is nitrogen.
[0011] A flow meter is provided on the air inlet pipeline between the purge air source and the filter.
[0012] The automatic valve is a solenoid valve, and a dual-time automatic circulation relay is connected to the solenoid valve.
[0013] The manual valve is a ball valve, and the air inlet pipe is a PU pipe; the joint pipe is welded on the elbow at the bottom of the dryer tower, and the purge pipe and the docking pipe are both steel pipes.
[0014] The beneficial effects of the utility model are as follows: when the utility model is used, the purge gas is introduced into the purge assembly, and the purge gas passes through the gradually shrinking purge pipe to purge the materials in the dead corner area of the elbow at the bottom of the dryer tower. The end of the purge pipe adopts a flat mouth structure to increase the flow rate of the purge gas and purge the materials in the dead corner area more thoroughly; the docking pipe outside the purge pipe seals the purge pipe inside to ensure that there is no air leakage during the purge process. The tower bottom purge device of the utility model can purge materials in the dead corner area to avoid blockage, and eliminate the risk of high-temperature oxidation and smoldering caused by long-term accumulation of materials, effectively improving the safety of equipment operation.
[0015] Preferably, the butt-joint pipe adopts a gradually expanding conical structure so that both ends of the butt-joint pipe can be adapted to the purge pipe and the joint pipe respectively.
[0016] Preferably, the retaining edge above the flat mouth structure can prevent materials from entering the interior of the purge pipe.
[0017] Preferably, nitrogen is used as the purge gas, which is more stable and will not affect the material; a stainless steel filter is used to filter impurities in the nitrogen.
[0018] Preferably, the gas flow meter is used to observe the instantaneous flow and total flow of nitrogen when it is used.
[0019] Preferably, the solenoid valve is used to automatically control the on and off time of the purge gas output, and the solenoid valve is used to enable the entire device to achieve automatic purging. The dual-time automatic cycle relay connected to the solenoid valve is used to control the on and off time of the solenoid valve, thereby enabling the purging device to achieve pulse purging.
[0020] Preferably, the manual valve adopts a ball valve to achieve manual control. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 This is a schematic diagram of a spray dryer bottom purge device according to an embodiment of the utility model;
[0022] Figure 2 yes Figure 1 Schematic diagram of the purge pipeline;
[0023] Figure 3 yes Figure 2 A top view of
[0024] Figure 4 yes Figure 1 Right view of .
[0025] In the figure: 1-elbow at the bottom of the dryer tower, 2-connector pipe, 3-air inlet pipe, 4-manual valve, 5-purge pipe, 5.1-flat mouth structure, 5.2-baffle, 6-docking pipe, 7-purge air source, 8-filter, 9-automatic valve, 10-flow meter, 11-dual time automatic cycle relay. DETAILED DESCRIPTION
[0026] The utility model is described in detail below with reference to the accompanying drawings and specific embodiments.
[0027] The spray dryer tower bottom purge device of one embodiment of the utility model is as follows Figures 1 to 4 As shown, the spray dryer tower bottom purge device of this embodiment includes a joint pipe 2 fixed at the lowest point of the dryer tower bottom elbow 1, the joint pipe 2 is horizontally arranged, and a purge assembly is connected to the joint pipe 2. The purge assembly includes an air intake pipe 3, a manual valve 4, a purge pipe 5 and a docking pipe 6. The air intake pipe 3 is connected to a purge gas source, and an automatic valve 9 is arranged on the air intake pipe 3. The manual valve 4 is a ball valve, and the manual valve 4 is connected between the air intake pipe 3 and the purge pipe 5. The purge pipe 5 and the docking pipe 6 are both horizontally arranged. The pipe 6 is sleeved on the outer periphery of the purge pipe 5. One end of the butt pipe 6 is fixedly connected to the manual valve 4 and the other end is fixedly connected to the joint pipe 2. One end of the purge pipe 5 is connected to the manual valve 4 and the other end enters the joint pipe 2. The purge pipe 5 is a gradually shrinking structure from the manual valve 4 to the joint pipe 2. The end of the purge pipe 5 connected to the manual valve 4 is a round mouth. The end of the purge pipe 5 entering the joint pipe 2 is a horizontally arranged flat mouth structure 5.1. The upper part of the flat mouth structure 5.1 of the purge pipe 5 is provided with a retaining edge 5.2. The joint pipe 2 is welded to the elbow 1 at the bottom of the dryer tower. The purge pipe 5 and the butt pipe 6 are both steel pipes.
[0028] The docking pipe 6 is a tapered structure that gradually expands from the manual valve 4 to the joint pipe 2. An annular connecting plate is provided at the mutually connected part of the docking pipe 6 and the purge pipe 5, and the docking pipe 6 and the purge pipe 5 are fixed together by the annular connecting plate.
[0029] One end of the purge pipe 5 is connected to the manual valve 4 by a thread. One end of the air intake pipe 3 is connected to a purge gas source 7, and the other end is connected to a filter 8, the filter 8 is connected to the manual valve 4, and the automatic valve is arranged on the air intake pipe between the purge gas source and the filter. The filter 8 is a stainless steel filter, and the purge gas source 7 is nitrogen. The air intake pipe adopts a PU pipe, and a flow meter 10 is arranged on the air intake pipe 3 between the purge gas source 7 and the filter 8. The automatic valve 9 is a solenoid valve, and a dual-time automatic cycle relay 11 is connected to the solenoid valve.
[0030] When the utility model is used, the purge gas is introduced into the purge assembly, and the purge gas passes through the gradually shrinking purge pipe to purge the materials in the dead corner of the elbow at the bottom of the dryer tower. The end of the purge pipe adopts a flat mouth structure to increase the flow rate of the purge gas and purge the materials in the dead corner more thoroughly; the retaining edge above the flat mouth structure can prevent the materials from entering the purge pipe, and the docking pipe outside the purge pipe seals the purge pipe inside to ensure that there is no air leakage during the purge process; the purge gas adopts nitrogen, and the purge is more stable and will not affect the materials. The manual valve is a ball valve, and the nitrogen can be manually controlled to be on and off; the solenoid valve is used to automatically control the on and off of the nitrogen output, and the dual-time automatic cycle relay connected to the solenoid valve is used to control the on and off time of the solenoid valve; the gas flow meter is used to observe the instantaneous flow and total flow when the nitrogen is used; the stainless steel filter is used to filter impurities in the nitrogen.
[0031] The solenoid valve, gas flow meter, stainless steel filter (built-in filter element), ball valve and purge pipeline are connected in sequence with PU pipes, and the frequency of nitrogen purge is controlled by controlling the on-off time of the solenoid valve with a dual-time automatic cycle relay. The nitrogen pressure is controlled at about 0.65Mpa during the purge. The tower bottom purge device of the utility model can intermittently purge materials in dead corners with nitrogen to avoid blockage, and eliminate the risk of high-temperature oxidation and smoldering caused by long-term accumulation of materials, effectively improving the safety of equipment operation.
[0032] The above embodiments and descriptions are only for explaining the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which shall all fall within the scope of the present invention to be protected.
Claims
1. A spray dryer bottom purge device, characterized in that: It includes a joint pipe fixed at the lowest point of the elbow at the bottom of the dryer tower, the joint pipe is horizontally arranged, a purge assembly is connected to the joint pipe, the purge assembly includes an air intake pipe, a manual valve, a purge pipe and a docking pipe, the air intake pipe is connected to a purge gas source, an automatic valve is arranged on the air intake pipe, the manual valve is connected between the air intake pipe and the purge pipe, the purge pipe and the docking pipe are both horizontally arranged, the docking pipe is sleeved on the outer periphery of the purge pipe, one end of the docking pipe is fixedly connected to the purge pipe, and the other end is fixedly connected to the joint pipe, one end of the purge pipe is connected to the manual valve, and the other end enters into the joint pipe, the purge pipe is in a gradually contracting structure from the manual valve to the joint pipe, the end of the purge pipe connected to the manual valve is a round mouth, and the end of the purge pipe entering the joint pipe is a horizontally arranged flat mouth structure.
2. The spray dryer bottom purge device according to claim 1, characterized in that: The butt joint pipeline is in a gradually expanding conical structure from the manual valve to the joint pipeline.
3. The spray dryer bottom purge device according to claim 1, characterized in that: An annular connecting plate is provided at the position where the butt joint pipe and the purge pipe are connected to each other, and the butt joint pipe and the purge pipe are fixed together through the annular connecting plate.
4. The spray dryer bottom purge device according to claim 1, characterized in that: A retaining edge is provided on the upper portion of the flat mouth structure of the purge pipeline.
5. The spray dryer bottom purge device according to claim 1, characterized in that: One end of the purge pipeline is connected to the manual valve via a thread.
6. The spray dryer bottom purge device according to claim 1, characterized in that: One end of the air intake pipeline is connected to a purge air source, and the other end is connected to a filter. The filter is connected to the manual valve, and the automatic valve is arranged on the air intake pipeline between the purge air source and the filter.
7. The spray dryer bottom purge device according to claim 6, characterized in that: The filter is a stainless steel filter, and the purge gas source is nitrogen.
8. The spray dryer bottom purge device according to claim 6, characterized in that: A flow meter is provided on the air inlet pipeline between the purge air source and the filter.
9. The spray dryer bottom purge device according to claim 1, characterized in that: The automatic valve is a solenoid valve, and a dual-time automatic circulation relay is connected to the solenoid valve.
10. The spray dryer bottom purge device according to claim 1, characterized in that: The manual valve is a ball valve, and the air inlet pipe is a PU pipe; the joint pipe is welded on the elbow at the bottom of the dryer tower, and the purge pipe and the docking pipe are both steel pipes.