A waste gas treatment device for sodium silicate production

Abstract

This invention relates to the field of waste gas treatment technology, specifically to a waste gas treatment device for sodium silicate production, comprising a cylinder, a cleaning hopper, a cleaning pipe, and a negative pressure system. The cylinder is divided into a cyclone chamber, a bag filter chamber, and an outlet chamber. Multiple filter bags are arranged in the bag filter chamber. The cleaning hopper is rotatably mounted within the cyclone chamber, and the cleaning pipe rotates in conjunction with the cleaning hopper. Branch pipes are provided on the cleaning pipe, and the negative pressure system is located outside the cylinder and connected to the branch pipes. This waste gas treatment device for sodium silicate production, through the coordinated arrangement of the cylinder, cleaning hopper, cleaning pipe, and negative pressure system, utilizes negative pressure to cause dust falling from the filter bags to sequentially pass through the cleaning chamber, cleaning hopper, and cleaning pipe before falling into the cyclone chamber inside the cylinder for collection. The rotation of the cleaning hopper enables batch cleaning, eliminating the need for a traditional external cyclone dust collector, making cleaning simpler and more convenient, and improving treatment efficiency.

Description

Technical Field

[0001] This invention relates to the field of waste gas treatment technology, specifically to a waste gas treatment device for sodium silicate production. Background Technology

[0002] Sodium silicate is an inorganic compound formed by the combination of silicon dioxide and sodium oxide in a specific ratio. Its aqueous solution is often called water glass. In industrial production, sodium silicate plays multiple roles as an adhesive, detergent builder, and preservative, and its applications extend from casting and building materials to washing, textiles, and many other fields.

[0003] In sodium silicate production, the high-temperature calcination process in the sodium silicate melting furnace continuously generates a large amount of industrial waste gas. This waste gas has a complex composition, containing dust, sulfur dioxide, and nitrogen oxides. Direct discharge would severely damage the surrounding atmospheric environment and fail to meet current air pollutant emission standards. Modern factories employ a combined treatment technology: first, most dust is removed through dust removal; then, the flue gas enters a desulfurization and denitrification system. Desulfurization may use a dry method (injecting absorbents such as sodium bicarbonate) or a semi-dry method, while denitrification may employ selective non-catalytic reduction (SNCR) technology, injecting a reducing agent (such as ammonia) within a specific temperature range to convert nitrogen oxides into nitrogen and water, ultimately ensuring that the treated gas emitted into the atmosphere meets emission standards.

[0004] Multi-stage dust collectors are the main equipment for dust removal using dust collection methods. They combine bag filters and cyclone dust collectors. The upper part of the equipment consists of a multi-tube bag filter enclosed in a cylindrical shell, while the lower part is a conical cyclone dust collector. Flue gas enters the dust collector from the lower end and rotates at high speed due to the tangential angle of the inlet pipe and the shape of the outer shell. Large dust particles in the flue gas accumulate on the inner wall of the shell due to inertia caused by rotation, eventually entering the ash hopper at the bottom. Smaller dust particles pass through the lower pressure zone in the middle of the cyclone and enter the bag filter at the upper end. The filter bags are equipped with double-layered filter cloth to achieve a larger filtration area. When the filter bags are full of dust particles, the rotating duct and desorption fan at the lower end are activated to desorb the dust particles from the filter bags in groups and send them into the external cyclone dust collector. Small dust particles will enter the separate ash hopper due to inertia, while the flue gas will return to the main dust collector for further purification. Through this process, the collection of dust particles of different sizes can be achieved with low energy consumption. However, the external cyclone dust collector not only increases the workload of daily operation and maintenance by processing the filter bags, but also requires the installation of reciprocating pipelines. Furthermore, the dust particles in the filter bags, after being filtered by the external cyclone dust collector, must return to the main dust collector for repeated filtration through the filter bags, which reduces the processing efficiency. Summary of the Invention

[0005] This invention provides a waste gas treatment device for sodium silicate production, which solves the problem that existing treatment equipment requires external cyclone dust collectors to clean the filter bags, increasing the workload of daily operation and maintenance, and has low treatment efficiency.

[0006] The present invention provides a waste gas treatment device for sodium silicate production, comprising a cylinder, a cleaning hopper, a cleaning pipe, and a negative pressure system. The cylinder is arranged vertically and is divided into a cyclone chamber, a bag filter chamber, and an outlet chamber arranged vertically from bottom to top. An air inlet is provided on the cylinder tangentially and communicating with the cyclone chamber. An air outlet is also provided on the cylinder, and both the air outlet and the bag filter chamber are connected to the outlet chamber. Multiple vertically arranged filter bags are arranged in the bag filter chamber, dividing the filter bags into multiple bag groups. Multiple cleaning chambers are provided in the cyclone chamber, communicating with the cleaning chambers. Each bag group corresponds to a cleaning chamber, and the cleaning chamber communicates with the filter bags in its corresponding bag group. The cleaning bucket is located within the cyclone chamber and can rotate around the vertical central axis of the cylinder, communicating with any cleaning chamber. The cleaning pipe is vertically and coaxially located within the cyclone chamber, below and communicating with the cleaning bucket, and rotates in conjunction with the cleaning bucket. A branch pipe is provided on the cleaning pipe, extending outward from the cylinder along the radial direction of the cleaning pipe and communicating with it. A negative pressure system is located outside the cylinder and connected to the branch pipe, used to provide negative pressure pulses to the branch pipe. An adjusting component is provided on the cleaning pipe, which has an open state and a closed state. When in the open state, dust is allowed to flow downwards, and when in the closed state, dust flow downwards is restricted. Initially, the adjusting component is in the open state, and when the negative pressure system draws negative pressure into the branch pipe, the adjusting component can switch from the open state to the closed state.

[0007] Furthermore, the regulating component includes a regulating valve and a regulating pipe. The regulating pipe is arranged vertically and coaxial with the cleaning pipe. The upper end of the regulating pipe is located inside the cleaning pipe, and the lower end extends into the cyclone chamber. The regulating valve is located inside the regulating pipe. In the initial state, the upper end of the regulating valve and the regulating pipe define an annular connecting hole.

[0008] Furthermore, a reflector is installed inside the cyclone chamber. The reflector is installed inside the cyclone chamber and is coaxial with the cylinder. The reflector is a conical structure with a smaller top and a larger bottom. A central hole is opened coaxially at the upper end of the reflector. An annular gap is defined between the lower end of the reflector and the inner wall of the cyclone chamber. The lower end of the regulating pipe extends into the central hole.

[0009] Furthermore, the regulating pipe and the cleaning pipe are slidably sealed and connected to the cleaning pipe through a second elastic element; the regulating pipe includes a vertical pipe section and a tapered pipe section, which are arranged and fixedly connected from top to bottom in the vertical direction. The tapered pipe section is a tubular structure that is larger at the top and smaller at the bottom. When the regulating element is in the open state, the vertical pipe section of the regulating pipe is in the central hole, and when the regulating element is in the closed state, the tapered pipe section of the regulating pipe is in the central hole.

[0010] Furthermore, two partition plates are arranged vertically inside the cylinder, and the cyclone chamber, the bag chamber, and the exhaust chamber are separated by the two partition plates.

[0011] Furthermore, the upper and lower ends of multiple bags are respectively set on two partition plates. The lower end inlet of the bag is connected to the cyclone chamber, and the upper end outlet of the bag is sealed by a sealing plate. An air outlet pipe is set on the upper partition plate. The air outlet pipe is set in a vertical direction, and the bag chamber and the air outlet chamber are connected through the air outlet pipe.

[0012] Furthermore, the driving component includes a motor and a rotating shaft. The rotating shaft is arranged vertically in the bag chamber, and two partition plates extend from its upper and lower ends respectively, and rotate with the two partition plates. The motor is installed in the air outlet chamber, the upper end of the rotating shaft is installed on the output shaft of the motor, and the lower end of the rotating shaft is fixedly connected to the cleaning bucket.

[0013] Furthermore, a partition plate is provided in the air outlet chamber, which divides the air outlet chamber into an upper chamber and a lower chamber arranged vertically from top to bottom. The motor is installed in the lower chamber, and the upper end of the air outlet pipe passes through the lower chamber and extends into the upper chamber.

[0014] Furthermore, a receiving hopper is provided inside the cyclone chamber. The receiving hopper is a cone-shaped hopper that is larger at the top and smaller at the bottom. Multiple chamber-dividing components are provided at the lower end of the partition plate below. The multiple chamber-dividing components are evenly distributed around the vertical central axis of the cylinder. Each chamber-dividing component includes two partition plates. The cleaning chamber is defined by the cleaning hopper and the two partition plates.

[0015] Furthermore, a filter screen is installed inside the branch pipe.

[0016] The beneficial effects of this invention are as follows: The waste gas treatment equipment for sodium silicate production of this invention integrates cyclone coarse dust removal, bag fine filtration and cleaning into the same cylinder by setting up a cylinder body, cleaning hopper, cleaning pipe and negative pressure system. It uses the cyclone chamber for preliminary dust removal and the bag for further filtration, which can meet the treatment requirements of waste gas generated during sodium silicate production. When the bag needs to be cleaned, the dust falling off the bag is collected in the cyclone chamber inside the cylinder by relying on the negative pressure, which passes through the cleaning chamber, cleaning hopper and cleaning pipe in sequence. The cleaning hopper rotates to achieve batch cleaning, eliminating the need for the traditional external cyclone dust collector, reducing the overall footprint of the equipment, making cleaning simpler and more convenient, and improving the treatment efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a waste gas treatment device for sodium silicate production according to the present invention;

[0019] Figure 2 This is a cross-sectional view of the overall structure of an embodiment of a waste gas treatment device for sodium silicate production according to the present invention;

[0020] Figure 3 This is a top view of the overall structure of an embodiment of a waste gas treatment device for sodium silicate production according to the present invention;

[0021] Figure 4 for Figure 3 A cross-sectional view along the AA direction;

[0022] Figure 5 for Figure 4 Enlarged view of point B in the middle;

[0023] Figure 6 for Figure 5 Enlarged view of point C (adjustment is in the closed position);

[0024] Figure 7 This is a schematic diagram of the regulating element in the open state of an embodiment of a waste gas treatment device for sodium silicate production according to the present invention.

[0025] Figure 8 for Figure 5 Enlarged view at point D;

[0026] Figure 9This is a diagram showing the state of the regulating pipe after it has moved upwards, according to an embodiment of the waste gas treatment equipment for sodium silicate production of the present invention.

[0027] In the diagram: 100, cylinder body; 110, partition plate; 111, air outlet pipe; 120, cyclone chamber; 121, air inlet; 122, outlet; 123, cleaning chamber; 124, reflector screen; 125, center hole; 126, receiving hopper; 127, partition plate; 128, connecting cylinder; 129, connecting ring; 130, bag chamber; 131, bag; 140, air outlet chamber; 141, air outlet; 142, partition plate; 200, cleaning hopper; 300, cleaning pipe; 310, branch pipe; 320, adjusting component; 321, adjusting valve; 322, adjusting pipe; 323, connecting hole; 324, second elastic component; 400, driving component; 410, rotating shaft. Detailed Implementation

[0028] 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.

[0029] An embodiment of the waste gas treatment equipment for sodium silicate production according to the present invention, such as... Figures 1 to 9 As shown.

[0030] A waste gas treatment device for sodium silicate production includes a cylinder 100, a cleaning hopper 200, a cleaning pipe 300, and a negative pressure system. The cylinder 100 is arranged vertically, and two partition plates 110 are arranged vertically inside the cylinder 100. The two partition plates 110 divide the cylinder 100 into a cyclone chamber 120, a bag chamber 130, and an exhaust chamber 140 arranged vertically from bottom to top. The cyclone chamber 120 has a conical structure that is larger at the top and smaller at the bottom. An air inlet 121 is provided on the cylinder 100 along its tangential direction and communicates with the cyclone chamber 120. An air outlet 141 is provided on the cylinder 100, and both the air outlet 141 and the bag chamber 130 communicate with the exhaust chamber 140. The bottom of the cyclone chamber 120 is provided with an outlet 122, and a discharge valve is provided on the outlet 122. When treating the exhaust gas, the discharge valve is in the closed state, and when it is necessary to discharge dust, the discharge valve is opened.

[0031] The bag chamber 130 contains multiple cloth bags 131, all arranged vertically, dividing the cloth bags 131 into multiple bag groups, with each bag group containing multiple cloth bags 131. The cyclone chamber 120 contains multiple cleaning chambers 123, which are connected. Each bag group corresponds to a cleaning chamber 123, and the cleaning chamber 123 is connected to the corresponding bag group containing the cloth bags 131.

[0032] A cleaning bucket 200 is disposed within a cyclone chamber 120. Initially, the cleaning bucket 200 is connected to one of the cleaning chambers 123. The cleaning bucket 200 can rotate around the vertical central axis of the cylinder 100 and is connected to either cleaning chamber 123. A cleaning pipe 300 is vertically disposed within the cyclone chamber 120, coaxial with the cyclone chamber 120 and located below the cleaning bucket 200. The cleaning pipe 300 is connected to and rotatably engages with the cleaning bucket 200. A branch pipe 310 is disposed on the cleaning pipe 300, extending radially outward from the cylinder 100 and connected to the cleaning pipe 300. A negative pressure system is disposed outside the cylinder 100 and connected to the branch pipe 310, used to provide negative pressure pulses to the branch pipe 310. Furthermore, a filter screen is disposed within the branch pipe 310, located at the connection between the cleaning pipe 300 and the branch pipe 310. By setting up a filter, dust is restricted from passing through branch pipe 310.

[0033] The cleaning pipe 300 is equipped with an adjusting component 320, which has an open state and a closed state. When it is in the open state, dust is allowed to flow downwards, and when it is in the closed state, dust is restricted from flowing downwards. Initially, the adjusting component 320 is in the open state, and when the negative pressure system draws negative pressure into the branch pipe 310, the adjusting component 320 can switch from the open state to the closed state.

[0034] The negative pressure system is an existing technology, specifically including a vacuum pump, a pulse module, and a solenoid valve. By controlling the switching time of the vacuum pump and the solenoid valve through the pulse module, a controllable intermittent negative pressure can be generated.

[0035] Specifically, the upper and lower ends of multiple fabric bags 131 are respectively mounted on two partition plates 110. The lower inlet of the fabric bag 131 is connected to the cyclone chamber 120, and the upper outlet of the fabric bag 131 is sealed by a sealing plate. An air outlet pipe 111 is provided on the upper partition plate 110. The air outlet pipe 111 is arranged vertically, with its lower end connected to the fabric bag chamber 130 and its upper end extending into the air outlet chamber 140. The fabric bag chamber 130 and the air outlet chamber 140 are connected through the air outlet pipe 111.

[0036] This embodiment, through the coordinated arrangement of a cylinder 100, a cleaning hopper 200, a cleaning pipe 300, and a negative pressure system, allows the dust-laden exhaust gas generated by the sodium silicate melting furnace to be fed into the cyclone chamber 120 at the bottom of the cylinder 100 via a tangential inlet 121. The airflow swirls at high speed along the cylinder wall, causing large dust particles in the exhaust gas to adhere to the inner wall of the cyclone chamber 120 due to centrifugal inertia and settle downwards by gravity. The central airflow carrying fine dust rises into each cleaning chamber 123, and is evenly distributed to the corresponding bag filter group. The fine dust is intercepted and filtered by the vertically arranged bag filters 131, and the clean gas penetrates the bag filters 131 and flows into the bag filter chamber 130, then upwards to the outlet chamber 140, and finally outwards through the outlet 141 to the downstream desulfurization and denitrification unit for deep exhaust gas treatment. In the initial state, the cleaning hopper 200 only connects to a single cleaning chamber 123, while all other bag filters participate in exhaust gas filtration simultaneously, ensuring normal dust removal throughput.

[0037] When the filter bag 131 needs to be cleaned after working for a period of time, drive the cleaning bucket 200 to rotate to the cleaning chamber 123 corresponding to the filter bag group that needs to be cleaned, and then start the negative pressure system to provide negative pressure pulses to the branch pipe 310, that is, to perform negative pressure operation on the branch pipe 310 intermittently and in a pulsed manner at a certain frequency.

[0038] Under the influence of negative pressure, the dust in the filter bag 131 connected to the cleaning hopper 200 will fall off and into the cleaning chamber 123. The dust will then fall from the cleaning chamber 123 into the cleaning hopper 200 and from the cleaning hopper 200 into the cleaning pipe 300. Under the influence of negative pressure, the adjusting component 320 will switch to the closed state, restricting the dust from flowing downwards through the cleaning pipe 300. This completes the cleaning of a single filter bag assembly. After a single pulse of negative pressure is supplied, the adjusting component 320 will switch to the open state, allowing the dust to be discharged downwards. The cleaning hopper 200 is then rotated to other cleaning chambers 123, and the pulse negative pressure cleaning operation is repeated until cleaning is complete.

[0039] It should be noted that, in the initial state, the bag assembly corresponding to the cleaning chamber 123 connected to the cleaning hopper 200 will be affected by the cleaning hopper 200 and will not be able to effectively participate in the filtration of exhaust gas. However, after the cleaning hopper 200 rotates away, the bag assembly can participate in the filtration during the next cleaning of exhaust gas.

[0040] This embodiment integrates cyclone coarse dust removal, bag filter 131 fine filtration and cleaning into the same cylinder 100. The cyclone chamber 120 is used for preliminary dust removal, and the bag filter 131 is used for further filtration, which can meet the treatment requirements of the waste gas generated during sodium silicate production. When the bag filter 131 needs to be cleaned, the dust falling off the bag filter 131 is caused by negative pressure to fall into the cyclone chamber 120 inside the cylinder 100 through the cleaning chamber 123, the cleaning hopper 200 and the cleaning pipe 300 in sequence for collection. The cleaning hopper 200 rotates to achieve batch cleaning, eliminating the need for a traditional external cyclone dust collector, reducing the overall footprint of the equipment, making cleaning simpler and more convenient, and improving the processing efficiency.

[0041] In a further embodiment, the regulating component 320 includes a regulating valve 321 and a regulating pipe 322. The regulating pipe 322 is arranged vertically and coaxial with the cleaning pipe 300. The upper end of the regulating pipe 322 is disposed inside the cleaning pipe 300, and the lower end extends into the cyclone chamber 120. The regulating valve 321 is disposed inside the regulating pipe 322. In the initial state, an annular connecting hole 323 is defined between the regulating valve 321 and the regulating pipe 322, allowing dust to flow downward. At this time, the regulating component 320 is in the open state.

[0042] The regulating valve 321 includes a valve core and a valve tube. The valve core is fixed inside the regulating tube 322 by a connecting bracket. The valve tube is connected to the valve core by a first elastic element. The first elastic element is arranged in a vertical direction and is a spring. The upper part of the valve tube is conical.

[0043] This embodiment uses a regulating valve 321 and a regulating pipe 322, see [link / reference] Figure 7 As shown, in the initial state, an annular connecting hole 323 is defined between the upper end of the regulating valve 321 and the regulating pipe 322, allowing dust to flow downwards. At this time, the regulating element 320 is in the open state. When a negative pressure pulse is provided to the branch pipe 310, under the influence of the negative pressure, the valve pipe of the regulating valve 321 will move upwards to block the connecting hole 323, and the regulating element 320 will switch to the closed state, restricting the downward flow of dust. See [reference needed]. Figure 6 As shown, after a single pulse of negative pressure supply ends, the regulating valve 321 automatically resets, and the connecting hole 323 reopens, allowing dust to flow downwards.

[0044] In a further embodiment, a reflector 124 is also provided inside the cyclone chamber 120. The reflector 124 is fixedly installed inside the cyclone chamber 120 by a bracket and is coaxial with the cylinder 100. The reflector 124 has a conical structure that is smaller at the top and larger at the bottom. A central hole 125 is coaxially opened at the upper end of the reflector 124, and an annular slit is defined between the lower end of the reflector 124 and the inner wall of the cyclone chamber 120. The lower end of the adjusting pipe 322 extends into the central hole 125.

[0045] During use, after the exhaust gas enters the cyclone chamber 120, the airflow will generate an outer vortex. When the outer vortex rotates to the reflector 124, most of the airflow will turn into an inner vortex. The inner vortex will rotate and rise under the action of the reflector 124. Large dust particles in the exhaust gas will adhere to the inner wall of the cyclone chamber 120 due to centrifugal inertia. The separated dust particles will fall with a small portion of the airflow from the annular seams around the reflector 124 and then fall to the bottom of the cyclone chamber 120 for collection. This small portion of the separated air will rise through the central hole 125 of the reflector 124. Due to the dust-blocking effect of the reflector 124, when this part of the airflow rises, it will prevent the dust from being carried away again.

[0046] Alternatively, in another possible embodiment, the regulating pipe 322 is slidably sealed to the cleaning pipe 300 and connected to the cleaning pipe 300 via a second elastic element 324, which is arranged vertically and is a spring. The regulating pipe 322 includes a vertical pipe section and a tapered pipe section, which are arranged sequentially from top to bottom in the vertical direction and fixedly connected. The tapered pipe section has a tapered structure that is larger at the top and smaller at the bottom. When the regulating element 320 is in the open state, the vertical pipe section of the regulating pipe 322 is located within the central hole 125, and when the regulating element 320 is in the closed state, the tapered pipe section of the regulating pipe 322 is located within the central hole 125.

[0047] This embodiment, by setting a second elastic element 324 and changing the structure of the regulating pipe 322, allows for simultaneous cleaning of the filter bag 131 and treatment of the exhaust gas, thus improving the efficiency of exhaust gas treatment. When a negative pressure pulse is provided to the branch pipe 310, after the regulating valve 321 blocks the connecting hole 323 upwards, the negative pressure will continue to drive the regulating pipe 322 upwards, causing the regulating pipe 322 to move upwards. This upward movement of the regulating pipe 322 will bring its tapered section into the central hole 125, changing the actual size of the central hole 125.

[0048] This setting is because when a negative pressure pulse is provided to the branch pipe 310, when the cleaning bucket 200 uses negative pressure to suck up the dust in the bag 131 of one of the bag groups, the bag chamber 130 will also be affected by negative pressure and become a negative pressure environment, thereby increasing the pressure difference between the bag chamber 130 and the cyclone chamber 120. At this time, the gas below the reflector 124 will tend to flow upward. Since the exhaust gas in the cyclone chamber 120 is still undergoing preliminary dust removal, in order to avoid the gas flowing upward from the annular gap and affecting the normal progress of preliminary dust removal, this embodiment moves the regulating pipe 322 upward to increase the amount of gas passing through the central hole 125, thereby preventing the gas from flowing upward from the annular gap and causing airflow interference.

[0049] In a further embodiment, a waste gas treatment device for sodium silicate production also includes a drive unit 400, which drives the cleaning bucket 200 to rotate around the vertical central axis of the cylinder 100.

[0050] The drive unit 400 includes a motor and a rotating shaft 410. The rotating shaft 410 is vertically positioned within the bag chamber 130, with two partition plates 110 extending from its upper and lower ends respectively, and rotatably engaging with the partition plates 110. A slewing bearing and a rotating sealing disc are provided between the rotating shaft 410 and the partition plates 110. The motor is installed within the air outlet chamber 140. The upper end of the rotating shaft 410 is fixedly mounted on the motor's output shaft, and the lower end of the rotating shaft 410 is fixedly connected to the cleaning hopper 200. In use, the motor is started, and the rotating shaft 410 drives the cleaning hopper 200 to rotate, allowing the cleaning hopper 200 to rotate to other cleaning chambers 123.

[0051] Furthermore, a partition plate 142 is provided inside the air outlet chamber 140. The partition plate 142 divides the air outlet chamber 140 into an upper chamber and a lower chamber arranged vertically from top to bottom. The motor is installed in the lower chamber, and the upper end of the air outlet pipe 111 passes through the lower chamber and extends into the upper chamber to avoid the gas affecting the normal operation of the motor.

[0052] Specifically, the cleaning bucket 200 includes a bucket body, a connecting pipe, and a rotating plate. The bucket body, connecting pipe, and rotating plate are arranged and fixedly connected in a vertical direction within the cyclone chamber 120. The bucket body, connecting pipe, and rotating plate are integrally formed. The bucket body is connected to the cleaning chamber 123, and the rotating plate is fixedly connected to the rotating shaft 410 and rotates in cooperation with the cleaning pipe 300.

[0053] Alternatively, the upper end of the rotating shaft 410 extends outside the cylinder 100, the motor is mounted outside the cylinder 100, and the rotating shaft 410 is mounted on the output shaft of the motor. This direct mounting of the motor outside the cylinder 100 avoids the gas inside the cylinder 100 affecting the motor's operation.

[0054] In a further embodiment, a receiving hopper 126 is also fixedly installed inside the cyclone chamber 120. The receiving hopper 126 is a conical hopper that is larger at the top and smaller at the bottom. Multiple chamber components are provided at the lower end of the partition plate 110 below. The multiple chamber components are evenly distributed around the vertical central axis of the cylinder 100. Each chamber component includes two partition plates 127. The cleaning chamber 123 is defined by the cleaning hopper 200 and the two partition plates 127.

[0055] The receiving hopper 126 is also fixedly provided with a connecting cylinder 128 at its lower end. The connecting cylinder 128 is arranged vertically and is integrally formed with the cleaning hopper 200. The cleaning pipe 300 is located inside the connecting cylinder 128, and the branch pipe 310 extends outward from the cylinder body 100 after passing through the connecting cylinder 128.

[0056] Furthermore, to improve the stability of the multiple partition plates 127, the lower ends of the multiple partition plates 127 are connected by a connecting ring 129. The connecting ring 129 is fixed to the inner wall of the connecting cylinder 128 by screws.

[0057] In this embodiment, by setting up a cleaning hopper 200, when cleaning the cloth bag 131, the dust falling from the cloth bag 131 enters the cleaning chamber 123 and then enters the cleaning hopper 200 along the slope of the cleaning hopper 200, and then enters the cleaning pipe 300 from the cleaning hopper 200.

[0058] Based on the above embodiments, the specific working process is as follows:

[0059] In use, the dust-laden exhaust gas generated by the sodium silicate melting furnace is sent into the cyclone chamber 120 at the bottom of the cylinder 100 through the tangential air inlet 121. The airflow swirls at high speed along the cylinder wall. Large dust particles in the exhaust gas adhere to the inner wall of the cyclone chamber 120 due to centrifugal inertia and settle downwards by their own weight. They fall from the annular seam around the reflector screen 124 and then fall to the bottom of the cyclone chamber 120 for collection.

[0060] A central airflow carrying fine dust enters each cleaning chamber 123 upwards, and is evenly distributed into the corresponding bag filter assembly. The fine dust is intercepted and filtered by the vertically arranged bag filters 131. Clean gas penetrates the bag filters 131 and flows into the bag filter chamber 130, then upwards to the outlet chamber 140, and finally outwards through the outlet 141 to the downstream desulfurization and denitrification unit for deep waste gas treatment. In the initial state, the cleaning hopper 200 connects to only a single cleaning chamber 123, while all other bag filters participate simultaneously in waste gas filtration to ensure normal dust removal throughput.

[0061] When the filter bag 131 needs to be cleaned after working for a period of time, drive the cleaning bucket 200 to rotate to the cleaning chamber 123 corresponding to the filter bag group that needs to be cleaned, and then start the negative pressure system to provide negative pressure pulses to the branch pipe 310, that is, to perform negative pressure operation on the branch pipe 310 intermittently and in a pulsed manner at a certain frequency.

[0062] Under the influence of negative pressure, the dust in the bag 131 connected to the cleaning hopper 200 will fall off and into the cleaning chamber 123. The dust will then fall from the cleaning chamber 123 into the cleaning hopper 200, and from the cleaning hopper 200 into the cleaning pipe 300. Furthermore, under the influence of negative pressure, the valve pipe of the regulating valve 321 will move upwards to block the connecting hole 323, and the regulating element 320 will switch to the closed state, restricting the downward flow of dust. (See [reference]). Figure 6 As shown, the cleaning of a single bag assembly is now complete. After the single pulse negative pressure supply ends, the regulating valve 321 automatically resets, and the connecting hole 323 reopens, allowing dust to flow downwards. (See [link]). Figure 7As shown. Then start the motor, which drives the cleaning bucket 200 to rotate via the rotating shaft 410, so that the cleaning bucket 200 rotates to other cleaning chambers 123, and repeat the pulse negative pressure cleaning operation until the cleaning is completed.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A waste gas treatment device for sodium silicate production, characterized in that: The system includes a cylinder, a cleaning hopper, a cleaning pipe, and a negative pressure system. The cylinder is vertically oriented and divided into a cyclone chamber, a baghouse chamber, and an exhaust chamber, arranged vertically from bottom to top. An air inlet, tangentially positioned and connected to the cyclone chamber, and an air outlet, both connected to the baghouse chamber, are located on the cylinder. The baghouse chamber contains multiple vertically arranged bags, forming multiple bag groups. Multiple cleaning chambers are located within the cyclone chamber, connected to each cleaning chamber. Each bag group corresponds to a cleaning chamber, and the cleaning chamber is connected to the bag in its corresponding bag group. The cleaning hopper is located within the cyclone chamber and can rotate around the vertical axis of the cylinder. The cleaning pipe rotates along the central axis and is connected to any cleaning chamber. The cleaning pipe is vertically and coaxially located in the cyclone chamber, below and connected to the cleaning hopper. The cleaning pipe and the cleaning hopper rotate together. A branch pipe is provided on the cleaning pipe. The branch pipe extends outward from the cylinder along the radial direction of the cleaning pipe and is connected to the cleaning pipe. The negative pressure system is located outside the cylinder and connected to the branch pipe to provide negative pressure pulses to the branch pipe. An adjusting component is provided on the cleaning pipe. The adjusting component has an open state and a closed state. When it is in the open state, dust is allowed to flow downward. When it is in the closed state, dust flow downward is restricted. Initially, the adjusting component is in the open state. When the negative pressure system draws negative pressure to the branch pipe, the adjusting component can switch from the open state to the closed state.

2. The waste gas treatment equipment for sodium silicate production according to claim 1, characterized in that: The regulating component includes a regulating valve and a regulating pipe. The regulating pipe is arranged vertically and is coaxial with the cleaning pipe. The upper end of the regulating pipe is located inside the cleaning pipe, and the lower end extends into the cyclone chamber. The regulating valve is located inside the regulating pipe. In the initial state, the upper end of the regulating valve and the regulating pipe define an annular connecting hole.

3. The waste gas treatment equipment for sodium silicate production according to claim 2, characterized in that: A reflector is installed inside the cyclone chamber and is coaxial with the cylinder. The reflector is a conical structure with a smaller top and a larger bottom. A central hole is opened coaxially at the upper end of the reflector. An annular gap is defined between the lower end of the reflector and the inner wall of the cyclone chamber. The lower end of the regulating pipe extends into the central hole.

4. The waste gas treatment equipment for sodium silicate production according to claim 3, characterized in that: The regulating pipe and the cleaning pipe are slidably sealed and connected to the cleaning pipe through a second elastic element. The regulating pipe includes a vertical pipe section and a tapered pipe section. The vertical pipe section and the tapered pipe section are arranged sequentially from top to bottom in the vertical direction and are fixedly connected. The tapered pipe section is a tubular structure that is larger at the top and smaller at the bottom. When the regulating element is in the open state, the vertical pipe section of the regulating pipe is in the central hole. When the regulating element is in the closed state, the tapered pipe section of the regulating pipe is in the central hole.

5. The waste gas treatment equipment for sodium silicate production according to claim 1, characterized in that: Two partition plates are arranged vertically inside the cylinder, and the cyclone chamber, the bag chamber, and the air outlet chamber are separated by the two partition plates.

6. The waste gas treatment equipment for sodium silicate production according to claim 5, characterized in that: Multiple fabric bags are respectively set on two partition plates at the top and bottom. The lower inlet of the fabric bag is connected to the cyclone chamber, and the upper outlet of the fabric bag is sealed by a sealing plate. An air outlet pipe is set on the upper partition plate. The air outlet pipe is set in a vertical direction, and the fabric bag chamber and the air outlet chamber are connected through the air outlet pipe.

7. The waste gas treatment equipment for sodium silicate production according to claim 6, characterized in that: The drive unit includes a motor and a rotating shaft. The rotating shaft is arranged vertically in the bag chamber, and two partition plates extend from its upper and lower ends respectively, and rotate with the two partition plates. The motor is installed in the air outlet chamber, the upper end of the rotating shaft is installed on the output shaft of the motor, and the lower end of the rotating shaft is fixedly connected to the cleaning bucket.

8. The waste gas treatment equipment for sodium silicate production according to claim 7, characterized in that: The air outlet chamber is equipped with a partition plate, which divides the air outlet chamber into an upper chamber and a lower chamber arranged vertically from top to bottom. The motor is installed in the lower chamber, and the upper end of the air outlet pipe passes through the lower chamber and extends into the upper chamber.

9. The waste gas treatment equipment for sodium silicate production according to claim 5, characterized in that: The cyclone chamber is equipped with a receiving hopper, which is a cone-shaped hopper that is larger at the top and smaller at the bottom. At the lower end of the partition plate below, there are multiple chamber-dividing components. The multiple chamber-dividing components are evenly distributed around the vertical central axis of the cylinder. Each chamber-dividing component includes two partition plates. The cleaning chamber is defined by the cleaning hopper and the two partition plates.

10. The waste gas treatment equipment for sodium silicate production according to claim 1, characterized in that: A filter screen is installed inside the branch pipe.

Images