A flue gas desulfurization system with automatic slurry filling
By designing a flue gas desulfurization system for automatic slurry replenishment, and automatically controlling the supplement of lime mortar with detectors and PLC control systems, the problem of untimely or insufficient replenishment of lime mortar in the prior art is solved, and the stability of the flue gas desulfurization effect and the full utilization of lime mortar are achieved.
Patent Information
- Application Number
- CN202420861018.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-23
- Publication Date
- 2025-04-11
- Estimated Expiration
- 2034-04-23
AI Technical Summary
In existing flue gas desulfurization systems, the supplementation of lime mortar usually depends on manual judgment, resulting in untimely or inadequate supplementation, affecting the flue gas desulfurization effect and the utilization rate of lime mortar.
A flue gas desulfurization system for automatic slurry replenishment is designed, including a desulfurization tower, lime mortar circulation tank, slurry adjustment barrel and PLC control cabinet. The state of flue gas and lime mortar is detected through a sulfur dioxide concentration detector and pH meter, and the lime mortar supplement valve is automatically controlled to replenish fresh lime mortar.
Automatic replenishment of lime mortar is achieved, ensuring the stability of the flue gas desulfurization effect and the full utilization of lime mortar, and avoiding the inadequate or insufficient replenishment problems caused by manual judgment.
Smart Images
Figure CN222738866U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of flue gas desulfurization, in particular to an automatic slurry filling flue gas desulfurization system. Background Art
[0002] The flue gas desulfurization system mainly includes a desulfurization tower and a lime slurry circulation pool. The lime slurry is sprayed into the flue gas to achieve flue gas desulfurization.
[0003] At present, whether fresh lime slurry is added to the lime slurry circulation pool is usually determined manually based on experience. The disadvantages are: on the one hand, fresh lime slurry may not be added in time, resulting in the pH value of the lime slurry sprayed into the flue gas being too low, and thus failing to achieve flue gas desulfurization standards; on the other hand, the lime slurry may not be fully utilized and discharged, resulting in the pH value of the discharged lime slurry being too high, which affects the cost of tailings water treatment. Utility Model Content
[0004] In view of this, the purpose of the utility model is to provide a flue gas desulfurization system with automatic slurry replenishment, so as to realize automatic replenishment of lime slurry, thereby taking into account both the flue gas desulfurization effect and the full utilization of lime slurry.
[0005] The utility model solves the above problems through the following technical means:
[0006] A flue gas desulfurization system with automatic slurry replenishment comprises a desulfurization tower, a lime slurry circulation pool, a slurry mixing barrel and a PLC control cabinet, wherein the bottom of the desulfurization tower is connected to the lime slurry circulation pool via an overflow chute, a sulfur dioxide concentration detector is provided at the flue gas outlet of the desulfurization tower, the lime slurry circulation pool is connected to a spray pipeline extending into the desulfurization tower, a spray pump is provided on the spray pipeline, and a pH meter is provided in the lime slurry circulation pool; the slurry mixing barrel is connected to the lime slurry circulation pool via a lime slurry replenishment pipeline, a lime slurry replenishment valve is provided on the lime slurry replenishment pipeline, and the sulfur dioxide concentration detector, the pH meter and the lime slurry replenishment valve are all electrically connected to the PLC control cabinet.
[0007] Furthermore, the lime slurry circulation tank is provided with a liquid level meter, and the liquid level meter is electrically connected to the PLC control cabinet.
[0008] Furthermore, the lime slurry circulation tank is connected to a slag discharge pipeline.
[0009] Furthermore, a slag discharge pump is provided on the slag discharge pipeline, and the slag discharge pump is electrically connected to the PLC control cabinet.
[0010] Furthermore, the lime slurry circulation tank is provided with a mixer.
[0011] Furthermore, the slurry mixing barrel is also provided with a stirrer.
[0012] Beneficial effects of the utility model:
[0013] The automatic slurry replenishment flue gas desulfurization system of the present application includes a desulfurization tower, a lime slurry circulation pool, a slurry mixing barrel and a PLC control cabinet. The bottom of the desulfurization tower is connected to the lime slurry circulation pool through an overflow chute, and the flue gas outlet of the desulfurization tower is provided with a sulfur dioxide concentration detector. The lime slurry circulation pool is connected to a spray pipeline extending into the desulfurization tower, and a spray pump is provided on the spray pipeline. The lime slurry circulation pool is provided with a pH meter; the slurry mixing barrel is connected to the lime slurry circulation pool through a lime slurry replenishment pipeline, and a lime slurry replenishment valve is provided on the lime slurry replenishment pipeline. The sulfur dioxide concentration detector, pH meter and lime slurry replenishment valve are all electrically connected to the PLC control cabinet. The flue gas desulfurization system of the present application realizes the automatic replenishment of lime slurry, thereby taking into account both the flue gas desulfurization effect and the full utilization of lime slurry. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments.
[0015] Figure 1 It is a schematic diagram of a preferred embodiment of the utility model. DETAILED DESCRIPTION
[0016] The utility model will be described in detail below with reference to the accompanying drawings. Figure 1 As shown: an automatic slurry replenishing flue gas desulfurization system, comprising a desulfurization tower 1, a lime slurry circulation pool 2, a slurry mixing barrel 3 and a PLC control cabinet 10, the bottom of the desulfurization tower is connected with the lime slurry circulation pool through an overflow chute 12, the flue gas outlet of the desulfurization tower is provided with a sulfur dioxide concentration detector 6, the lime slurry circulation pool is connected with a spray pipeline 13 extending into the desulfurization tower, the spray pipeline is provided with a spray pump 5, and the lime slurry circulation pool is provided with a pH meter 8; the slurry mixing barrel is connected with the lime slurry circulation pool through a lime slurry replenishing pipeline 15, the lime slurry replenishing pipeline is provided with a lime slurry replenishing valve 4, the sulfur dioxide concentration detector, the pH meter and the lime slurry replenishing valve are all electrically connected to the PLC control cabinet.
[0017] During operation, the lime slurry in the lime slurry circulation pool is pumped to the desulfurization tower through the spray pump and then sprayed onto the flue gas. The flue gas is desulfurized by the lime slurry. The lime slurry after the reaction flows back to the lime slurry circulation pool through the overflow chute. When the sulfur dioxide concentration detector detects that the sulfur dioxide concentration exceeds the set value, or the pH meter detects that the pH is lower than the set value, the signal is fed back to the PLC control cabinet, and the lime slurry replenishment valve is controlled by the PLC control cabinet to open, and fresh lime slurry is added to the lime slurry circulation pool, thereby increasing the pH value of the lime slurry and further improving its desulfurization capacity.
[0018] As a further improvement to the above technical solution, the lime slurry circulation tank is provided with a liquid level meter 7, which is electrically connected to the PLC control cabinet. During the desulfurization reaction process or the lime slurry replenishment process, the liquid level meter is used to detect the liquid level of the lime slurry circulation tank, and feed the liquid level signal back to the PLC control cabinet, and then the PLC control cabinet controls the opening and closing of the lime slurry replenishment valve, thereby ensuring a reasonable liquid level in the lime slurry circulation tank.
[0019] As a further improvement of the above technical solution, the lime slurry circulation pool is connected to a slag discharge pipeline 14. A slag discharge pump 9 is arranged on the slag discharge pipeline, and the slag discharge pump is electrically connected to the PLC control cabinet. The slag discharge function is realized by controlling the opening and closing of the slag discharge pump through the PLC control cabinet.
[0020] As a further improvement to the above technical solution, the lime slurry circulation tank and the slurry mixing barrel are both provided with a stirrer 11. The lime slurry is stirred by the stirrer to improve the uniformity of the lime slurry.
[0021] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.
Claims
1. An automatic slurry filling flue gas desulfurization system, characterized in that: It includes a desulfurization tower, a lime slurry circulation pool, a slurry mixing barrel and a PLC control cabinet. The bottom of the desulfurization tower is connected with the lime slurry circulation pool through an overflow chute. The flue gas outlet of the desulfurization tower is provided with a sulfur dioxide concentration detector. The lime slurry circulation pool is connected with a spray pipeline extending into the desulfurization tower. The spray pipeline is provided with a spray pump. The lime slurry circulation pool is provided with a pH meter. The slurry mixing barrel is connected with the lime slurry circulation pool through a lime slurry replenishing pipeline. The lime slurry replenishing pipeline is provided with a lime slurry replenishing valve. The sulfur dioxide concentration detector, pH meter and lime slurry replenishing valve are all electrically connected with the PLC control cabinet.
2. The automatic grouting flue gas desulfurization system according to claim 1 is characterized in that: The lime slurry circulation tank is provided with a liquid level meter, and the liquid level meter is electrically connected to the PLC control cabinet.
3. The automatic grouting flue gas desulfurization system according to claim 2 is characterized in that: The lime slurry circulation pool is connected with a slag discharge pipeline.
4. The automatic grouting flue gas desulfurization system according to claim 3 is characterized in that: The slag discharge pipeline is provided with a slag discharge pump, and the slag discharge pump is electrically connected to the PLC control cabinet.
5. The automatic grouting flue gas desulfurization system according to claim 4 is characterized in that: The lime slurry circulation pool is provided with a stirrer.
6. The automatic grouting flue gas desulfurization system according to claim 5 is characterized in that: The slurry mixing barrel is also provided with a stirrer.