Accurate control device suitable for ammonia water and lime for float melting furnace flue gas treatment

Abstract

The utility model belongs to the technical field of flue gas treatment of a float glass melting furnace, particularly relates to an accurate control device for ammonia water and lime for flue gas treatment of a float glass melting furnace, and provides the following scheme aiming at the problems that the monitoring of the concentration of ammonia water and lime and the original concentration in flue gas and the treatment of NOx / SO2 peak valley value in the flue gas of the melting furnace are not involved in the background technology. Comprising a flue gas pipeline, the outer wall of the flue gas pipeline is fixedly connected with a temperature and humidity sensor and an SO2 and NOx concentration sensor, and the outer wall of one end of the flue gas pipeline is provided with a desulfurization tower. The utility model provides a set of accurate control system of ammonia water and lime suitable for the flue gas characteristics of the float glass melting furnace, which can stably operate and treat various pollutants in the flue gas, accurately identify the parameters of main pollutants in the flue gas and the concentration of a denitration and desulfurization agent, achieve the optimal use amount of ammonia water and lime for denitration and desulfurization, and improve the quality of the flue gas. The system can be applied to an existing denitration and dust removal system in an integrated mode, and is suitable for optimization and transformation of an existing flue gas treatment system.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas treatment for float glass furnaces, in particular to a precise control device for ammonia water and lime applicable to flue gas treatment of float furnaces. Background Art

[0002] The float glass furnace is one of the key equipment for producing float glass, and it is one of the three major thermal equipment on the float glass production line. The main body of the float glass furnace includes a charging port, a regenerator, a melting tank, a portland, a working tank, etc.

[0003] After retrieval, the patent (application number: 202311308066.2) discloses "a method and device for reducing ammonia injection in SCR denitration system". This device predicts the NOx content at the inlet of the SCR denitration system through a prediction model to obtain the predicted value of the NOx content at the inlet; calculates the average value of the real-time content value of NOX at the inlet and the predicted value of the NOx content at the inlet, and sets the initial ammonia injection amount of the SCR denitration system according to the average value; obtains the ammonia content value at the outlet of the SCR denitration system, and calculates the ammonia slip rate value of the SCR denitration system according to the initial ammonia injection amount and the ammonia content value at the outlet, and at the same time determines whether the ammonia slip rate value is lower than the set ammonia slip rate value; if the ammonia slip rate value is not lower than the set ammonia slip rate value, the initial ammonia injection amount is adjusted according to the ammonia content value at the outlet to obtain the final ammonia injection amount. However, this device does not involve the monitoring of the concentrations of ammonia water and lime and the original concentration in the flue gas, and the treatment of the peak and valley values of NOx / SO2 in the flue gas of the furnace. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a precise control device for ammonia water and lime applicable to flue gas treatment of float furnaces, overcomes the deficiencies of the prior art, and effectively solves the problems in the prior art that do not involve the monitoring of the concentrations of ammonia water and lime and the original concentration in the flue gas, and the treatment of the peak and valley values of NOx / SO2 in the flue gas of the furnace.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A precise control device for ammonia water and lime applicable to flue gas treatment of float furnaces includes a flue gas pipeline. A temperature and humidity sensor, as well as a SO2 and NOx concentration sensor, are respectively fixedly connected to the outer wall of the flue gas pipeline, and a desulfurization tower is installed on the outer wall of one end of the flue gas pipeline;

[0007] A reducing agent injection valve is installed on the outer wall of one side of the desulfurization tower. A spraying pipe is fixedly connected to the outer wall of one side of the reducing agent injection valve. An ammonia water and lime concentration meter is installed on the outer wall of the spraying pipe, and a reaction tank is installed on the outer wall of one end of the spraying pipe. An ammonia water storage tank and a lime storage tank are arranged on one side of the reaction tank.

[0008] Preferably, regulating valves are installed between the ammonia water storage tank, the lime storage tank and the reaction tank.

[0009] Preferably, a dust removal and denitrification pipe is fixedly connected to the top of the outer wall of one side of the desulfurization tower, and a dust removal and denitrification machine is installed on the outer wall of one end of the dust removal and denitrification pipe.

[0010] Preferably, a purification pipe is fixedly connected to the outer wall of one side of the dust removal and denitrification machine, and a blower is installed on the outer wall of the purification pipe.

[0011] Preferably, a flue gas outlet monitor is fixedly connected to the outer wall of the purification pipe.

[0012] Preferably, a ventilation and exhaust pipe is installed on the outer wall of one end of the purification pipe.

[0013] Preferably, the temperature and humidity sensor, the SO2 and NOx concentration sensors, the flue gas outlet monitor, and the ammonia water and lime concentration meters are all connected to a calculation and control response system through signal lines.

[0014] The beneficial effects of the present utility model are as follows:

[0015] 1. The precision control device for ammonia water and lime used in the flue gas treatment of the float glass furnace of the present design provides a precision control system for ammonia water and lime suitable for the flue gas characteristics of the float glass furnace, which can stably operate to treat various pollutants in the flue gas, accurately identify the main pollutant parameters in the flue gas and the concentration of denitrification and desulfurization agents, achieve the optimal dosage of ammonia water and lime for denitrification and desulfurization, and the flue gas emission concentration value is extremely low and stable.

[0016] 2. The precision control device for ammonia water and lime used in the flue gas treatment of the float glass furnace of the present design can perform real-time feedback tracking of desulfurization, denitrification and dust removal treatment according to the flue gas emission cycle characteristics of the float glass furnace, meet the goal of stable data after system treatment, and the system can accurately calculate and control the dosage of ammonia water and lime according to the flue gas emission cycle characteristics of the float glass furnace, avoid waste caused by extensive spraying, and this system can be integrally applied with existing denitrification and dust removal systems by removing the same and retaining the differences, and is suitable for the optimization and transformation of existing flue gas treatment systems. Description of the Drawings

[0017] Figure 1 It is the front view of the overall structure of the precision control device for ammonia water and lime used in the flue gas treatment of the float glass furnace proposed by the present utility model;

[0018] Figure 2 It is the side view of the overall structure of the precision control device for ammonia water and lime used in the flue gas treatment of the float glass furnace proposed by the present utility model;

[0019] Figure 3This is a schematic structural diagram of a precise control device for ammonia water and lime used in the flue gas treatment of a float glass melting furnace according to the present utility model.

[0020] In the figure: 1. Flue gas pipeline; 2. Temperature and humidity sensor; 3. SO2 and NOx concentration sensor; 4. Desulfurization tower; 5. Reducing agent injection valve; 6. Spray pipe; 7. Ammonia water and lime concentration meter; 8. Reaction tank; 9. Ammonia water storage tank; 10. Lime storage tank; 11. Control valve; 12. Dust removal and denitration pipe; 13. Dust removal and denitration machine; 14. Purification pipe; 15. Blower; 16. Dust outlet monitor; 17. Ventilation and exhaust pipe. Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0022] Embodiment 1, referring to Figures 1 to 3 , a precise control device for ammonia water and lime used in the flue gas treatment of a float glass melting furnace, includes a flue gas pipeline 1. The outer wall of the flue gas pipeline 1 is fixedly connected with a temperature and humidity sensor 2 and an SO2 and NOx concentration sensor 3 respectively, and a desulfurization tower 4 is installed on the outer wall of one end of the flue gas pipeline 1.

[0023] In this embodiment, a precise control system for ammonia water and lime suitable for the flue gas characteristics of a float glass melting furnace is provided, which can stably operate to treat various pollutants in the flue gas, accurately identify the main pollutant parameters in the flue gas and the concentration of denitration and desulfurization agents, achieve the optimal dosage of ammonia water and lime for denitration and desulfurization, and the flue gas emission concentration value is ultra-low and stable.

[0024] Embodiment 2, referring to Figures 2 to 3 , a precise control device for ammonia water and lime used in the flue gas treatment of a float glass melting furnace. A reducing agent injection valve 5 is installed on the outer wall of one side of the desulfurization tower 4, and a spray pipe 6 is fixedly connected to the outer wall of one side of the reducing agent injection valve 5. An ammonia water and lime concentration meter 7 is installed on the outer wall of the spray pipe 6, and a reaction tank 8 is installed on the outer wall of one end of the spray pipe 6. An ammonia water storage tank 9 and a lime storage tank 10 are arranged on one side of the reaction tank 8.

[0025] In this embodiment, the system can perform real-time feedback tracking of desulfurization, denitration and dust removal treatment according to the flue gas emission cycle characteristics of a float glass melting furnace, meet the goal of stable data after system treatment, and the system can accurately calculate and control the dosage of ammonia water and lime according to the flue gas emission cycle characteristics of a float glass melting furnace, avoid waste caused by rough spraying. This system can be integrally applied with differences on the existing denitration and dust removal systems, and is suitable for the optimization and transformation of existing flue gas treatment systems.

[0026] Referring toFigure 2 A regulating valve 11 is installed between the ammonia water storage tank 9, the lime storage tank 10 and the reaction tank 8.

[0027] Refer to Figure 1 On the top of the outer wall of one side of the desulfurization tower 4, a dust removal and denitration pipe 12 is fixedly connected, and a dust removal and denitration machine 13 is installed on the outer wall of one end of the dust removal and denitration pipe 12. A purification pipe 14 is fixedly connected to the outer wall of one side of the dust removal and denitration machine 13, and a blower 15 is installed on the outer wall of the purification pipe 14.

[0028] Refer to Figure 1 On the outer wall of the purification pipe 14, a flue gas outlet monitor 16 is fixedly connected, and a ventilation and exhaust pipe 17 is installed on the outer wall of one end of the purification pipe 14.

[0029] Refer to Figures 1 to 2 The temperature and humidity sensor 2, the SO2 and NOx concentration sensors 3, the flue gas outlet monitor 16, and the ammonia water and lime concentration meter 7 are all connected to a calculation control response system through signal lines.

[0030] Working principle: The system installs a SO2 and NOx concentration sensor 3 for non-delay detection, and it is installed at the front end of the desulfurization tower 4 in the integrated dust removal, desulfurization and denitration system. The monitoring data uses second-level response, and the data is almost non-delayed and fed back to the calculation control system as one of the calculation input data.

[0031] The system installs an ammonia water and lime concentration meter 7 for denitration, and the concentration data is fed back to the calculation control system in real time as one of the calculation input data. The calculation control system includes a calculation program for the ammonia water dosage and a calculation program for the lime dosage, and the signal is fed back to the ammonia water storage tank 9 and the lime storage tank 10 in the form of an electrical signal.

[0032] Adjustment equipment input signal: 4 - 10mADC, 4 - 20mA DC;

[0033] Output signal: 4 - 20mA.DC;

[0034] The ammonia water concentration can be selected in the range of 8%, 10%, 20%, 30%.

[0035] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and the inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A precise control device for ammonia water and lime used in the flue gas treatment of a float glass furnace, comprising a flue gas pipeline (1), characterized in that, The outer wall of the flue gas pipeline (1) is fixedly connected with a temperature and humidity sensor (2), as well as a SO2 and NOx concentration sensor (3), and a desulfurization tower (4) is installed on the outer wall of one end of the flue gas pipeline (1); A reducing agent injection valve (5) is installed on the outer wall of one side of the desulfurization tower (4), and a spraying pipe (6) is fixedly connected to the outer wall of one side of the reducing agent injection valve (5). An ammonia water and lime concentration meter (7) is installed on the outer wall of the spraying pipe (6), and a reaction tank (8) is installed on the outer wall of one end of the spraying pipe (6). An ammonia water storage tank (9) and a lime storage tank (10) are arranged on one side of the reaction tank (8).

2. The precise control device for ammonia water and lime applicable to the flue gas treatment of a float glass furnace according to claim 1, wherein, Regulating valves (11) are installed between the ammonia water storage tank (9), the lime storage tank (10) and the reaction tank (8).

3. The precise control device for ammonia water and lime applicable to the flue gas treatment of a float glass furnace according to claim 1, characterized in that, A dust removal and denitration pipe (12) is fixedly connected to the top of the outer wall of one side of the desulfurization tower (4), and a dust removal and denitration machine (13) is installed on the outer wall of one end of the dust removal and denitration pipe (12).

4. The precise control device for ammonia water and lime applicable to the flue gas treatment of a float glass furnace according to claim 3, characterized in that, A purification pipe (14) is fixedly connected to the outer wall of one side of the dust removal and denitration machine (13), and a blower (15) is installed on the outer wall of the purification pipe (14).

5. The precise control device for ammonia water and lime applicable to the flue gas treatment of a float glass furnace according to claim 4, characterized in that, A flue dust outlet monitor (16) is fixedly connected to the outer wall of the purification pipe (14).

6. The precise control device for ammonia water and lime applicable to the flue gas treatment of a float glass furnace according to claim 4, characterized in that, A ventilation and exhaust pipe (17) is installed on the outer wall of one end of the purification pipe (14).

7. The precise control device for ammonia water and lime applicable to the flue gas treatment of a float glass furnace according to claim 4, wherein The temperature and humidity sensor (2), the SO2 and NOx concentration sensor (3), the flue dust outlet monitor (16), and the ammonia water and lime concentration meter (7) are all connected to a calculation and control response system through signal lines.

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