Gypsum removal control system of desulfurization system

Abstract

The utility model discloses a gypsum removal control system of a desulfurization system, which belongs to the technical field of gypsum dehydration and comprises a concentration tank, a gypsum discharge pump, a cyclone, a belt conveyor, a gypsum warehouse, a vacuum pump, a flushing pump and a local control cabinet. The output end of the concentration tank is connected with the input end of the gypsum discharge pump, the output end of the gypsum discharge pump is connected with the input end of the swirler, and the output end of the swirler and the output end of the flushing pump are respectively connected with the input end of the belt conveyor. The output end of the belt conveyor is respectively connected with the input end of the gypsum warehouse and the input end of the vacuum pump; and the local control cabinet is in control connection with the gypsum discharge pump, the belt conveyor, the vacuum pump and the flushing pump respectively. Through two different but complementary control modes of the remote control system and the local control cabinet, the situation that slurry overflows from the gypsum discharge port of the belt conveyor due to equipment failure can be greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of gypsum dehydration, and particularly relates to a gypsum control system of desulfurization system. BACKGROUND

[0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute the prior art.

[0003] In the process of rock wool production, the smelting furnace will produce flue gas containing a large amount of sulfur dioxide, sulfur dioxide is one of the main atmospheric pollutants, and a desulfurization system needs to be used to treat the flue gas. The desulfurization method used in general flue gas desulfurization is mainly a wet limestone gypsum desulfurization method, which will produce by-product gypsum, which needs to be dehydrated and removed at regular intervals, otherwise it will affect the lime desulfurization reaction, therefore, gypsum removal is a necessary requirement of the desulfurization system.

[0004] A large amount of by-product gypsum will be produced during the operation of the desulfurization system, but the initial gypsum moisture content will be high and cannot be utilized, so the gypsum needs to be dehydrated to reduce the gypsum moisture content so that it can be waste-utilized.

[0005] In the existing desulfurization system, the staff needs to start the gypsum dehydration equipment at different positions, which is complicated and labor-intensive, and special staff need to be on site to monitor the equipment operation when removing gypsum. Once a problem occurs, the staff needs to run back and forth between multiple equipment positions to check or shut down the equipment, the operation process is too urgent, which can easily lead to operation problems or safety problems of the staff.

[0006] The existing automatic gypsum removal system removes gypsum by measuring slurry density, but it is too rigid and does not consider the production environment. When problems such as high gypsum moisture content on the belt of the belt conveyor, water flowing out of the discharge port of the belt conveyor, too much flushing water, too much water in the desulfurization circulating pool (oxidation pool or sedimentation pool), and breaking the pool balance occur during equipment operation, the remote control system cannot automatically discover, which can easily cause slurry overflow due to equipment problems. UTILITY MODEL CONTENT

[0007] In order to solve the technical problems existing in the prior art, the utility model provides a gypsum removal control system of desulfurization system, which can facilitate the staff to control and operate the gypsum removal process.

[0008] To achieve the above purpose, the utility model is realized by the following technical scheme:

[0009] The gypsum removal control system of a desulfurization system comprises a concentration tank, a gypsum removal pump, a cyclone, a belt conveyor, a gypsum storage, a vacuum pump, a flushing pump and an on-site control cabinet; the output end of the concentration tank is connected with the input end of the gypsum removal pump, the output end of the gypsum removal pump is connected with the input end of the cyclone, the output end of the cyclone and the output end of the flushing pump are respectively connected with the input end of the belt conveyor, and the output end of the belt conveyor is respectively connected with the input end of the gypsum storage and the input end of the vacuum pump.

[0010] The on-site control cabinet is respectively connected with the gypsum removal pump, the belt conveyor, the vacuum pump and the flushing pump.

[0011] Further, the concentration tank, the gypsum removal pump and the cyclone are connected through a slurry pipeline.

[0012] Further, the gypsum removal control system further comprises a sedimentation tank, and the sedimentation tank is connected with the belt conveyor.

[0013] Further, the output end of the belt conveyor is respectively connected with the input end of the vacuum pump and the input end of the sedimentation tank, the output end of the vacuum pump is connected with the input end of the sedimentation tank, the input end of the flushing pump is connected with a tap water pipe, and the output end of the flushing pump is connected with the belt conveyor.

[0014] Further, the gypsum removal control system further comprises a remote control system, and the remote control system is respectively connected with the gypsum removal pump, the belt conveyor, the vacuum pump and the flushing pump.

[0015] Further, the remote control system adopts a DCS distributed control system.

[0016] Further, the gypsum removal pump, the belt conveyor, the vacuum pump and the flushing pump respectively send signal feedback to the remote control system.

[0017] The gypsum removal control system has the following beneficial effects:

[0018] The gypsum removal control system has the following beneficial effects:

[0019] The utility model reduces the work load of staff, through this system staff need not run back and forth between multiple equipment positions to open the equipment of gypsum removal, also need not specially dispatch staff to keep staring at the equipment operation on the spot, when the equipment has a problem, staff need not urgently check the equipment and close the equipment, avoid the operation problem or safety problem of staff.

[0020] The utility model makes the gypsum removal control process more free, simplifies in the aspect of automatic control, considers the production environment condition, the automatic control of the utility model is not the best, but because the manual on-site control cabinet is combined, manual intervention can be carried out when the remote control system cannot monitor the equipment operation problem through signal feedback, only through manual opening equipment or normal inspection to find the problem, reduce the operation problem condition.

[0021] The utility model combines automatic control and manual on-site control, so that the gypsum removal part of the desulfurization system will not cause byproduct pollution problem, and the neatness of the working environment around the desulfurization system can be ensured. DRAWINGS

[0022] The drawings are used to provide further understanding of the utility model, and constitute a part of the specification, and are used together with the embodiments of the utility model to explain the utility model, and do not constitute the limitation of the utility model.

[0023] Figure 1 The system architecture diagram of the utility model embodiment.

[0024] 1-remote control system, 2-on-site control cabinet, 3-cyclone, 4-belt conveyor, 5-gypsum discharge pump, 6-concentration tank, 7-vacuum pump, 8-flushing pump, 9-tap water pipe, 10-sedimentation tank, 11-gypsum storage. CONCRETE EMBODIMENT

[0025] The utility model will be further described below in combination with the drawings and specific embodiments.

[0026] Programmable Logic Controller (PLC for short), a kind of digital electronic equipment with microprocessor, the digital logic controller for automatic control, control instruction can be loaded into memory storage and execution at any time.

[0027] DCS is a new generation of instrument control system based on microprocessor, using the design principle of control function dispersion, display operation concentration, giving consideration to autonomy and comprehensive coordination.

[0028] As Figure 1The utility model discloses a kind of gypsum removal control systems of desulfurization system, including concentration pool 6, gypsum discharge pump 5, cyclone 3, belt conveyor 4, gypsum storehouse 11, vacuum pump 7, flush pump 8 and local control cabinet 2;The output end of the concentration pool 6 is connected with the input end of the gypsum discharge pump 5, the output end of the gypsum discharge pump 5 is connected with the input end of the cyclone 3, the output end of the cyclone 3, the output end of the flush pump 8 is respectively connected with the input end of the belt conveyor 4, the output end of the belt conveyor 4 is respectively connected with the input end of the gypsum storehouse 11, the input end of the vacuum pump 7;

[0029] The local control cabinet 2 is respectively connected with the gypsum discharge pump 5, belt conveyor 4, vacuum pump 7 and flush pump 8.

[0030] In the embodiment, concentration pool 6, gypsum discharge pump 5, cyclone 3 are connected by slurry pipeline, cyclone 3 is located above belt conveyor 4, slurry falls into belt conveyor 4 from the cloth mouth below cyclone 3 after passing through cyclone 3, gypsum storehouse 11 is located below belt conveyor 4 discharge port, gypsum can directly fall into gypsum storehouse 11 after dehydration;Vacuum pump 7, flush pump 8 are installed around belt conveyor 4, adopt pipeline and connect with belt conveyor 4;Local control cabinet 2 is flexibly selected according to actual situation Installation position.

[0031] Concentration pool 6 is secondary aeration to circulating slurry, and is an independent pool, after sufficient aeration, slurry is punched into cyclone 3 and other equipment by gypsum discharge pump 5 to start dehydration and gypsum removal, and concentration pool 6 refers to equipment used in slurry (gypsum slurry) treatment process, for storing slurry and processing according to subsequent equipment. Concentration pool can also be replaced by oxidation pool, displacement pool and the like, oxidation pool in desulfurization system refers to a kind of equipment specially used for slurry treatment, usually located downstream of desulfurization tower, for further processing gypsum slurry generated in desulfurization process;The main role of displacement pool of desulfurization system is to recover and reuse gypsum slurry. For the treatment pool of slurry, equipment or container capable of storing slurry can be used, and the embodiment is not specifically limited.

[0032] In the embodiment, the gypsum discharge pump 5 is a slurry pump for transporting the slurry from the thickening tank 6 to the cyclone 3 for primary dewatering. The cyclone (desulfurized gypsum cyclone) is used for separating and filtering the solid particles in the slurry containing desulfurized gypsum, which can effectively separate the solid particles and improve the efficiency of desulfurized gypsum recovery. The belt conveyor 4 is a vacuum dewatering belt conveyor, which is the main equipment for desulfurized gypsum (in order to ensure the accumulation of dewatered gypsum, a gypsum storage tank is arranged below the belt conveyor 4 to temporarily store the gypsum), and is used for secondary dewatering of the slurry after dewatering by the cyclone 3 to obtain gypsum. The vacuum pump 7 is used to pressurize and adsorb the slurry on the belt conveyor through the vacuum tank, and forcibly suck out the water to realize dewatering of the gypsum slurry. The flushing pump 8 is a pump for increasing the water pressure of tap water when flushing the filter cloth of the belt conveyor. When the water pressure of tap water is sufficient, the flushing pump 8 can not be used. The gypsum storage tank 11 is a gypsum temporary storage tank below the discharge port of the vacuum dewatering belt conveyor 4, and the wall can be reinforced with steel plates.

[0033] Further, the cyclone 3 includes a cyclone and a manual valve. The cyclone is the core component of the cyclone, which can efficiently realize solid-liquid separation. The manual valve is a mechanical device for controlling the flow of slurry in the cyclone, which changes the flow state of the slurry by manual operation, and has the functions of flow guiding, cutting off, adjusting, etc.

[0034] Further, the vacuum pump 7 generates negative pressure to form a vacuum environment, so that the water in the slurry is sucked out, and the air from the belt conveyor 4 is discharged to the environment through the vacuum pump 7. The evacuation is to discharge the gas and part of the water in the vacuum pump to the air during operation.

[0035] In the embodiment, the desulfurized gypsum control system further includes a sedimentation tank 10, which is a tank for backflow of waste water generated in the flushing and dewatering process, and any tank capable of storing liquid can also be used.

[0036] Further, the sedimentation tank 10, the belt conveyor 4, the vacuum pump 7 and the flushing pump 8 form a dewatering and cleaning process. The output end of the belt conveyor 4 is connected with the input end of the vacuum pump 7 and the input end of the sedimentation tank 10 respectively, the output end of the vacuum pump 7 is connected with the input end of the sedimentation tank 10, the input end of the flushing pump 8 is connected with a tap water pipe, and the output end of the flushing pump 8 is connected with the belt conveyor 4. Specifically, the vacuum pump 7 forcibly sucks out the water in the slurry on the belt conveyor 4 and transports it to the sedimentation tank 10, the flushing pump 8 flushes the filter cloth of the belt conveyor 4 after connecting with tap water, and the waste water after flushing the filter cloth of the belt conveyor 4 flows into the sedimentation tank 10.

[0037] In the embodiment, the gypsum removal control system further comprises a remote control system 1, which is respectively in control connection with the gypsum discharge pump 5, the belt conveyor 4, the vacuum pump 7 and the flushing pump 8, and can be remotely controlled. Meanwhile, the gypsum discharge pump 5, the belt conveyor 4, the vacuum pump 7 and the flushing pump 8 are in wireless bidirectional communication with the remote control system, can receive the control instructions of the remote control system, and can also send the signal feedback of the running state to the remote control system.

[0038] The remote control system is realized by using a DCS distributed control system, using an existing controller system, and collecting, transmitting and processing signals through an AIAO module built-in.

[0039] The gypsum discharge pump 5, the belt conveyor 4, the vacuum pump 7 and the flushing pump 8 are also provided with remote signal feedback, that is, the AIAO module built-in monitors whether the motors of each device are in action, and analyzes and transmits the running state of the device. That is, the DCS distributed control system obtains the action state of the device, understands the running condition of the device, and remotely controls according to the running condition. Meanwhile, different device running states have different prerequisites, and there is a sequence: the flushing pump 8 runs before the belt conveyor 4 runs, and the belt conveyor 4 runs before the gypsum pump runs. The sequence is set in the remote control system in advance. The remote control system starts each device in sequence according to the sequence of device running, and sends signal feedback to the remote control system after the device is started. After receiving the running signal feedback of the flushing pump 8, the belt conveyor 4 is started, and after receiving the running signal feedback of the belt conveyor 4, the vacuum pump 7 and the gypsum discharge pump 5 are started in sequence. That is, the premise of the gypsum discharge pump running is that the belt conveyor runs, and when the belt conveyor is started, the gypsum discharge pump can be started. When the belt conveyor suddenly stops, the gypsum discharge pump will also stop in time; when the vacuum pump is started, the gypsum discharge pump can be started, and when the vacuum pump suddenly stops, the gypsum discharge pump will also stop in time.

[0040] In the embodiment, when the remote control system cannot monitor the running problems through signal feedback, and can only discover the problems through manual start of the device or normal inspection, the gypsum removal control system of the embodiment can be manually intervened, that is, controlled through the on-site control cabinet 2, to reduce the running problems.

[0041] When the gypsum removal system is on-site running, the workers observe and start the device beside, and realize the normal running of each device in the gypsum dehydration process through the on-site control cabinet (or the field control cabinet). The on-site control cabinet 2 comprises a power module and a control module connected thereto.

[0042] The power module (device power supply) is connected with each device and control module through power cable to supply power for each device and control module, including main circuit breaker (total power switch), each branch contactor (to make gypsum discharge pump, vacuum pump, flushing pump and belt machine independently powered), thermal relay (for overload protection) and surge protector (to prevent voltage fluctuation from damaging the device).

[0043] The control module includes PLC controller, main power knob, each device start-stop button and running status indicator light. When a device start-stop button is pressed, it is turned on as a switch in the circuit, and the PLC controller sends control instructions to each device motor to control the device to run.

[0044] Further, each device start-stop button includes gypsum discharge pump, belt machine, vacuum pump and flushing pump start-stop button, and the start-stop button includes emergency stop button and self-reset start button. Further, the running status indicator light is green for running, yellow for standby and red for fault.

[0045] The on-site control cabinet is assembled using existing devices or components with conventional connections to realize the operation of each device in the gypsum dewatering process. Specifically, the vacuum pump, flushing pump, belt machine and gypsum discharge pump are started by gradually pressing the buttons to make the system run and dewater the gypsum slurry to produce desulfurization product gypsum.

[0046] It should be noted that each component in the gypsum removal control system, including the concentration tank, gypsum discharge pump, cyclone, belt machine, gypsum storage, vacuum pump, flushing pump and sedimentation tank, is realized using existing devices in the desulfurization system, and the working principle and component structure are all prior art content. This embodiment will not be described further.

[0047] Working principle detailed description:

[0048] The gypsum removal control system combines automatic control with manual on-site control, so that the gypsum removal part of the desulfurization system will not cause byproduct pollution problems, and can ensure the cleanliness of the working environment around the desulfurization system.

[0049] The remote control system starts the vacuum pump, flushing pump, belt machine and gypsum discharge pump for gypsum removal process according to the device running status feedback from the gypsum discharge pump, belt machine, vacuum pump and flushing pump and the sequence between different devices. The gypsum discharge pump pumps the gypsum slurry from the concentration tank into the cyclone, where the slurry is dewatered. The dewatered gypsum slurry enters the vacuum belt machine for dewatering. The water in the slurry is forcibly sucked out by the vacuum pump. The filter cloth of the belt machine is flushed by the flushing pump. The dewatered gypsum can be directly stored in the gypsum storage for transportation.

[0050] When the remote control system cannot be autonomously found, such as the gypsum water content on the belt is high caused by the vacuum pump stop, the device stops or the device motor runs, but the coupling of the pump is damaged and cannot feedback the working condition to the remote control system, water flows out from the discharge port; If the flushing water consumption is too much, the water in the desulfurization circulating pool (oxidation pool or sedimentation pool) is too much (operation problem), the pool balance is broken, etc., manual intervention can be carried out while meeting the automatic operation, and the worker controls the vacuum pump, the flushing pump, the belt conveyor and the gypsum discharge pump through the on-site control cabinet to realize the desulfurization process.

[0051] Although the specific embodiments of the present application are described above with reference to the drawings, it is not a limitation on the scope of protection of the present application. Those skilled in the art should understand that various modifications or changes made by those skilled in the art without creative labor on the basis of the technical scheme of the present application are still within the scope of protection of the present application.

Claims

1. A gypsum control system for a desulfurization system, the system comprising: The system comprises a concentration tank, a gypsum discharge pump, a cyclone, a belt conveyor, a gypsum storage, a vacuum pump, a flushing pump and a local control cabinet; the output end of the concentration tank is connected with the input end of the gypsum discharge pump, the output end of the gypsum discharge pump is connected with the input end of the cyclone, the output end of the cyclone and the output end of the flushing pump are respectively connected with the input end of the belt conveyor, and the output end of the belt conveyor is respectively connected with the input end of the gypsum storage and the input end of the vacuum pump. The local control cabinet is respectively connected with the gypsum discharge pump, the belt conveyor, the vacuum pump and the flushing pump.

2. A gypsum control system for a desulphurisation system as claimed in claim 1, characterised in that: The concentration tank, the gypsum discharge pump and the cyclone are connected through a slurry pipeline.

3. A gypsum control system for a desulphurisation system as claimed in claim 1, characterised in that: The gypsum removal control system further comprises a sedimentation tank connected with the belt conveyor.

4. A gypsum control system for a desulphurisation system as claimed in claim 3, characterised in that: The output end of the belt conveyor is respectively connected with the input end of the vacuum pump and the input end of the sedimentation tank, the output end of the vacuum pump is connected with the input end of the sedimentation tank, the input end of the flushing pump is connected with a tap water pipe, and the output end of the flushing pump is connected with the belt conveyor.

5. The gypsum removal control system of the desulfurization system according to claim 1, characterized in that: The gypsum removal control system further comprises a remote control system respectively connected with the gypsum discharge pump, the belt conveyor, the vacuum pump and the flushing pump.

6. A gypsum control system for a desulphurisation system as claimed in claim 5, characterised in that: The remote control system adopts a DCS distributed control system.

7. A gypsum control system for a desulphurisation system as claimed in claim 5, characterised in that: The gypsum discharge pump, the belt conveyor, the vacuum pump and the flushing pump respectively send signal feedback to the remote control system.

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