An external modular absorption tower impurity online cleaning system

Abstract

The utility model relates to absorption tower crystallization cleaning equipment technical field especially relates to a kind of external modularization absorption tower impurity on-line cleaning system. Including controller, absorption tower, circulating slurry pump etc. Absorption tower discharge port is sequentially communicated with circulating slurry pump via net filter, cyclone separator, magnetic separation device, and each component blowdown port is connected with sewage tank. System adopts wedge-shaped stainless steel filter screen, sets up bypass pipeline and electric valve, and is equipped with differential pressure transmitter, realizes automation control by controller, can clean impurity on-line, solves traditional cleaning needs to stop, and the problems, such as low efficiency, guarantee desulfurization system stable operation.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment technology, and in particular to an online impurity cleaning system for an external modular absorption tower. Background Technology

[0002] Currently, most thermal power plants employ wet desulfurization processes. With increasingly stringent environmental regulations, the flue gas desulfurization systems in coal-fired power plants place higher demands on the stability and output of the slurry circulation pumps. To protect the safety of the circulating slurry pump equipment, filters are typically installed at the inlet of the circulating slurry pump pipeline. However, due to the poor flowability of the slurry at the inlet of the circulating pump pipeline, gypsum crystals or gypsum often accumulate there. As the deposits gradually accumulate, they can clog the inlet of the slurry circulation pump pipeline, preventing the pump from drawing the slurry to the top of the absorption tower for desulfurization. This significantly reduces the desulfurization effect, leading to excessive emissions of flue gas and affecting the stable operation of the unit.

[0003] Traditional absorber tower circulating slurry pumps have filters installed at the inlet to intercept large particles of impurities in the slurry. However, when the filters become clogged, the system must be shut down and personnel must enter the tower for manual cleaning, a time-consuming and labor-intensive process. Existing solutions rely on regular manual maintenance, lacking real-time monitoring and automated cleaning capabilities. Furthermore, the limited capacity of the built-in filters exacerbates the problem of frequent clogging. Specifically, cleaning the built-in filters requires shutdown and emptying the absorber tower slurry, which can disrupt the desulfurization system, affecting the continuity of power plant operations and incurring high costs. Filter clogging cannot be detected in real time, relying solely on manual judgment, resulting in low maintenance efficiency. The built-in filters are small and easily saturate, requiring frequent cleaning. Personnel entering the absorber tower also pose safety risks such as harmful gases and falling objects. Utility Model Content

[0004] To address the problems in existing technologies, such as the lack of an active cleaning mechanism leading to manual shutdowns for cleaning affecting desulfurization efficiency, the reliance on experience-based maintenance due to the lack of real-time monitoring resulting in delays, small filter capacity requiring frequent cleaning, and safety hazards associated with manual cleaning inside the tower, this invention proposes an external modular absorber online impurity cleaning system. By installing a filtration device outside the circulating pump, impurities are separated from the absorber liquid through a mesh filter and a hydrocyclone separator, and iron impurities are removed by a magnetic separator. This ensures that the liquid entering the circulating pump is clean and prevents blockages.

[0005] The technical solution of this utility model is as follows:

[0006] An external modular absorption tower impurity online cleaning system includes a controller, an absorption tower, and a circulating slurry pump. The outlet of the absorption tower is connected to a mesh filter via a pipeline. The outlet of the mesh filter is connected to the inlet of a hydrocyclone separator via a pipeline. The outlet of the hydrocyclone separator is connected to the inlet of a magnetic separator via a pipeline. The outlet of the magnetic separator is connected to the circulating slurry pump via a pipeline. The wastewater outlets of the mesh filter, hydrocyclone separator, and magnetic separator are respectively connected to a wastewater collection chamber.

[0007] Preferably, an inspection port is provided on one side of the sludge collection compartment.

[0008] Preferably, the sludge collection chamber is located below the mesh filter, cyclone separator, and magnetic separator.

[0009] Preferably, the mesh filter has a wedge-shaped filter screen.

[0010] Preferably, the material of the wedge-shaped filter screen is stainless steel.

[0011] Preferably, the outlet of the absorption tower is connected to the inlet of the circulating slurry pump via a bypass pipeline.

[0012] Preferably, the bypass pipeline is equipped with electric valves on both the side near the absorber outlet and the side near the circulating slurry pump, and both the electric valves on the side near the absorber outlet and the side near the circulating slurry pump are connected to a controller.

[0013] Preferably, the pipeline between the absorption tower and the mesh filter, and the pipeline between the magnetic separator and the circulating slurry pump are all equipped with electric valves, and the electric valves between the absorption tower and the mesh filter, and between the magnetic separator and the circulating slurry pump are all connected to a controller.

[0014] Preferably, the electric valves between the absorption tower and the mesh filter, and the electric valves between the magnetic separator and the circulating slurry pump are all equipped with differential pressure transmitters, and the differential pressure transmitters are connected to the controller.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. This utility model features an innovative bypass circulation system that enables online cleaning of impurities and seamless switching between the main process and desulfurization without interrupting the desulfurization operation. This ensures the system operates stably 24 / 7, significantly improving production continuity and operational efficiency.

[0017] 2. This utility model is equipped with a differential pressure transmitter and an automated control system to monitor pressure changes at key nodes in real time. After triggering a threshold warning, it automatically executes pipeline switching and cleaning procedures, which greatly reduces the frequency of manual inspections and operational errors, and promotes the intelligent upgrade of operation and maintenance mode.

[0018] 3. This utility model adopts a three-stage deep purification architecture of filtration, cyclone separation and magnetic separation, which accurately intercepts impurities with different particle sizes and physical properties, and the impurity removal rate is improved to over 99%, effectively extending the service life of the equipment and optimizing the desulfurization process.

[0019] 4. The fully enclosed modular design of this utility model avoids the high-risk operation of traditional manual entry into the absorption tower for cleaning, eliminates the hidden dangers of confined space operation from the source, and, combined with remote intelligent control, builds a safe and reliable modern industrial operation and maintenance system.

[0020] 5. This utility model reduces the equipment operating resistance caused by impurity accumulation and lowers the energy consumption of equipment such as circulating slurry pumps through precise impurity separation and circulation optimization. Compared with traditional cleaning methods, it can effectively reduce the overall operating power consumption of the system and achieve energy-saving goals.

[0021] 6. The efficient removal of impurities by this utility model avoids wear and corrosion of internal components, pipes and pumps of the absorption tower, reduces equipment failure rate, significantly extends equipment service life and reduces equipment replacement and maintenance costs.

[0022] 7. This utility model system adopts a modular design, and each component can be disassembled and replaced independently, which facilitates functional upgrades and optimizations according to production needs or technological developments, adapts to different working conditions and process requirements, and improves the system's versatility and scalability.

[0023] 8. This utility model centrally collects and properly handles impurities, avoiding the pollution caused by the random discharge of impurities, and meets strict environmental protection requirements.

[0024] 9. The controller of this utility model collects and analyzes data from all aspects of the system in real time, providing comprehensive data support for operation and maintenance management, making it easier for managers to grasp the equipment operating status, formulate scientific and reasonable maintenance plans and production strategies, and achieve refined management. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of an external modular absorption tower impurity online cleaning system according to the present invention.

[0026] In the diagram: 1. Absorption tower; 2. Circulating slurry pump; 3. Mesh filter; 4. Hydrocyclone separator; 5. Magnetic separator; 6. Sludge collection tank; 7. Inspection port; 8. Bypass pipeline. Detailed Implementation

[0027] An external modular absorption tower impurity online cleaning system includes a controller, an absorption tower 1, and a circulating slurry pump 2. The outlet of the absorption tower 1 is connected to a mesh filter 3 via a pipeline, and the outlet of the mesh filter 3 is connected to the inlet of a hydrocyclone separator 4 via a pipeline. The mesh filter 3 uses a wedge-shaped filter screen made of stainless steel. The outlet of the hydrocyclone separator 4 is connected to the inlet of a magnetic separator 5 via a pipeline, and the outlet of the magnetic separator 5 is connected to the circulating slurry pump 2 via a pipeline. The drain outlet of the mesh filter 3 is connected to a sludge collection chamber 6, which is also connected to the drain outlets of the hydrocyclone separator 4 and the magnetic separator 5. The sludge collection chamber 6 is located below the mesh filter 3, the hydrocyclone separator 4, and the magnetic separator 5. An inspection port 7 is provided on one side of the sludge collection chamber 6.

[0028] The outlet of the absorption tower 1 is connected to the inlet of the circulating slurry pump 2 via a bypass pipe 8. Electric valves are installed on both the side of the bypass pipe 8 near the outlet of the absorption tower 1 and the side near the circulating slurry pump 2. Both the electric valves near the outlet of the absorption tower 1 and the electric valves near the circulating slurry pump 2 are connected to a controller.

[0029] The pipelines between the absorption tower 1 and the mesh filter, and between the magnetic separator 5 and the circulating slurry pump 2, are all equipped with electric valves. The electric valves between the absorption tower 1 and the mesh filter 3, and between the magnetic separator 5 and the circulating slurry pump 2, are all connected to a controller. Differential pressure transmitters are also installed on the electric valves between the absorption tower 1 and the mesh filter, and between the magnetic separator 5 and the circulating slurry pump 2. These differential pressure transmitters are connected to the controller.

[0030] In this invention, when filtering the slurry from the absorption tower 1: the slurry flows out of the outlet and first passes through a mesh filter 3 equipped with an 80-100 mesh stainless steel wedge filter screen, intercepting unreacted desulfurizing agent particles, large particles of coal ash, and other large particulate impurities, completing primary filtration; then it enters a hydrocyclone separator 4, where, under centrifugal force, high-density heavy metal salt particles, undissolved mineral particles, etc., are separated from the slurry and discharged from the drain outlet, achieving secondary hydrocyclone separation; subsequently, the separated slurry enters a magnetic separator, where, under the action of a magnetic field, magnetic metal impurities such as iron, cobalt, and nickel are adsorbed, preventing wear on the circulating slurry pump 2. The purified slurry finally enters the circulating slurry pump 2, while the impurities separated by the mesh filter 3, hydrocyclone separator 4, and magnetic separator are all collected in the sludge collection chamber 6 through the drain outlet for centralized treatment. Furthermore, the system, with the cooperation of a differential pressure transmitter and electric valves, ensures stable operation of the slurry filtration system in the flue gas desulfurization system of coal-fired power plants. The differential pressure transmitter monitors the pressure difference across the mesh filter 3 in real time, establishing a three-level early warning mechanism: when the pressure difference is less than 50 kPa, the system is in normal operation; when the pressure difference is between 50 and 80 kPa, the system triggers an alarm to alert maintenance personnel; if the pressure difference exceeds 80 kPa, the system determines it to be blocked and immediately initiates an emergency response. The electric valve adopts a ball valve structure with a response time of less than 3 seconds, enabling rapid switching between the main and bypass pipelines 8 while strictly controlling the flow deviation within 5%. This ensures timely isolation of blocked filter units and maintains smooth slurry circulation, thus maintaining the stability of the desulfurization process.

Claims

1. An external modular absorption tower impurity online cleaning system, comprising a controller, an absorption tower (1), and a circulating slurry pump (2), characterized in that, The outlet of the absorption tower (1) is connected to the mesh filter (3) through a pipeline, the outlet of the mesh filter (3) is connected to the inlet of the hydrocyclone separator (4) through a pipeline, the outlet of the hydrocyclone separator (4) is connected to the inlet of the magnetic separator (5) through a pipeline, and the outlet of the magnetic separator (5) is connected to the circulating slurry pump (2) through a pipeline. The drain ports of the mesh filter (3), cyclone separator (4), and magnetic separator (5) are respectively connected to the sludge collection chamber (6).

2. The external modular absorption tower impurity online cleaning system according to claim 1, characterized in that, The sludge collection chamber (6) is provided with an inspection port (7) on one side.

3. The online impurity cleaning system for an external modular absorption tower according to claim 1, characterized in that, The sludge collection chamber (6) is located below the mesh filter (3), the cyclone separator (4), and the magnetic separator (5).

4. The online impurity cleaning system for an external modular absorption tower according to claim 1, characterized in that, The mesh filter (3) has a wedge-shaped filter screen.

5. The external modular absorption tower impurity online cleaning system according to claim 4, characterized in that, The wedge-shaped filter screen is made of stainless steel.

6. The online impurity cleaning system for an external modular absorption tower according to claim 1, characterized in that, The outlet of the absorption tower (1) is connected to the inlet of the circulating slurry pump (2) through a bypass pipe (8).

7. The online impurity cleaning system for an external modular absorption tower according to claim 6, characterized in that, Electric valves are provided on both the side of the bypass pipe (8) near the outlet of the absorption tower (1) and the side near the circulating slurry pump (2). The electric valves on both sides are connected to the controller.

8. The online impurity cleaning system for an external modular absorption tower according to claim 1, characterized in that, Electric valves are provided in the pipes between the absorption tower (1) and the mesh filter (3) and the pipes between the magnetic separator (5) and the circulating slurry pump (2). The electric valves between the absorption tower (1) and the mesh filter and between the magnetic separator (5) and the circulating slurry pump (2) are all connected to the controller.

9. The online impurity cleaning system for an external modular absorption tower according to claim 8, characterized in that, The electric valves between the absorption tower (1) and the mesh filter, and the electric valves between the magnetic separator (5) and the circulating slurry pump (2) are all equipped with differential pressure transmitters, and the differential pressure transmitters are connected to the controller.

Images