CN209451615U - A reaction tank for coal-fired flue gas desulfurization based on sodium-calcium double-alkali method - Google Patents

Abstract

The utility model discloses a reaction tank for coal-fired flue gas desulfurization based on sodium-calcium double-alkali method. A drainage pump, a control box and a cleaning liquid inlet pump are installed from bottom to top. The drainage pump is connected to the tank body through a water pipe. The inside of the tank body is equipped with a cleaning liquid nozzle, a desulfurization net and an air collector. The output end of the cleaning liquid inlet pump is connected to the cleaning The input end of the liquid spray head is connected, and the upper part of the tank body is connected with an air guide pipe. The utility model is equipped with a tank body, a gas flow meter, a control box, a gas collector, an exhaust pipe, a first solenoid valve, a return pipe, a second solenoid valve, an induced draft fan, an air guide pipe, a gas quality sensor, a three-way valve, a vertical The pipe and the negative pressure fan solve the problem that the reaction tank does not fully absorb the sulfur dioxide in the exhaust gas and the lack of a flow guide mechanism inside the tank.

Description

A reaction tank for coal-fired flue gas desulfurization based on sodium-calcium double-alkali method

technical field

The utility model relates to the technical field of chemical auxiliary equipment, in particular to a coal-fired flue gas desulfurization reaction tank based on a sodium-calcium double-alkali method.

Background technique

The sodium-calcium double-alkali method is to use highly active sodium alkali as the absorbent to absorb sulfur dioxide, and then use calcium alkali to regenerate the absorption liquid. Because different types of alkali are used in the absorption and absorption liquid treatment, it is called sodium Calcium double alkali method. Sodium-calcium double-alkali method can effectively filter sulfur dioxide in exhaust gas, and this method is widely used in desulfurization equipment.

After searching, the patent notification number is CN202700350U, which discloses a flue gas desulfurization device, especially a sodium-calcium double-alkali flue gas desulfurization device. The utility model provides a sodium-calcium double-alkali flue gas desulfurization device which can oxidize sulfite more thoroughly and obtain high-quality gypsum, including a desulfurization absorption tower, a replacement reactor and an oxidation tank. Sulfur flue gas inlet, purified flue gas outlet, desulfurization rich liquid outlet and desulfurization liquid inlet.

The shortcomings of a flue gas desulfurization device in the prior art are:

1. The device adopts a single-cycle desulfurization method, which cannot fully absorb sulfur dioxide in the exhaust gas during operation, and the treatment effect is not good;

2. After the exhaust gas enters the tank, it lacks a diversion mechanism, and the exhaust speed is slow. Secondly, due to the lack of a diversion device after the exhaust gas enters the reaction tank, the air circulation is not restricted, it is easy to run around, and the absorption of sulfur dioxide is not uniform enough;

3. The device lacks an air intake monitoring mechanism, and cannot accurately monitor the gas flow during work.

Contents of the invention

Aiming at the deficiencies of the prior art, the utility model provides a coal-fired flue gas desulfurization reaction tank based on the sodium-calcium double-alkali method, which solves the incomplete absorption of sulfur dioxide in the exhaust gas by the reaction tank and the lack of a diversion mechanism inside the tank The problem.

In order to achieve the above purpose, the utility model provides the following technical solutions: a coal-fired flue gas desulfurization reaction tank based on the sodium-calcium double-alkali method, including a tank body, and the outer wall on one side of the tank body is provided with an air return port and an air inlet up and down, The outer wall of the other side of the tank is equipped with a drainage pump, a control box and a cleaning liquid inlet pump from bottom to top. The output end of the liquid inlet pump is connected to the input end of the cleaning liquid nozzle, the upper part of the tank is connected with an air guide pipe, and the top of the air guide pipe is connected to an exhaust pipe and a return pipe through a three-way valve. A solenoid valve, a second solenoid valve is installed inside the return pipe.

Preferably, an induced draft fan is installed on the return pipe, and the other end of the return pipe is connected to the air return port.

Preferably, a gas flow meter is installed inside the air inlet, and a gas quality sensor is installed inside the air duct.

Preferably, both the output end of the gas flowmeter and the output end of the gas quality sensor are connected to the input end of the control box, and the output end of the control box is electrically connected to the input end of the first electromagnetic valve and the input end of the second electromagnetic valve.

Preferably, through holes are evenly opened at the bottom of the air collecting cylinder.

Preferably, vertical pipes are sequentially arranged inside the gas collection cylinder, and a negative pressure fan is installed on the inner upper end of the gas collection cylinder, and the negative pressure fan is located directly above the vertical pipe.

The utility model provides a coal-fired flue gas desulfurization reaction tank based on the sodium-calcium double-alkali method, which has the following beneficial effects:

(1) The utility model is equipped with an exhaust pipe, a first solenoid valve, a return pipe, a second solenoid valve, an induced draft fan, an air guide pipe, a gas quality sensor, a three-way valve and a control box. Sufficient absorption of sulfur dioxide ensures the purity of the exhaust gas to the greatest extent, and solves the problem of incomplete air purification of the equipment. The utility model installs a gas quality sensor on the air guide pipe, and the top of the air guide pipe is connected to the exhaust gas through a three-way valve. When the sulfur dioxide in the exhaust gas exceeds the standard, the return pipe can be used for secondary recovery treatment to ensure the purity of the exhaust gas.

(2) The utility model is equipped with a gas collecting cylinder, and the utility model is equipped with a limit mechanism for the intake air, which can ensure a uniform flow rate of the gas and a stable flow direction of the gas, thereby making the absorption of sulfur dioxide more uniform, ensuring the effect of purifying the gas, and solving the problem of To solve the problem that the equipment has a bad effect on waste gas treatment, the utility model installs an air collecting cylinder inside the tank body, and can manage the direction of the exhaust gas flow through the function of the air collecting cylinder during work, and has a good use effect.

(3) The utility model is equipped with an air inlet and a gas flow meter. When the utility model is working, it can monitor the flow rate of the intake air, and then check the intake volume of the exhaust gas, which is convenient for the use of the staff and has a good use.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the structural enlarged view of place A in Fig. 1 of the utility model;

Fig. 3 is a schematic diagram of the internal structure of the gas collector in the utility model.

The reference signs in the figure are: 1. Tank body; 2. Air return port; 3. Air inlet; 4. Gas flow meter; 5. Through hole; 6. Drainage pump; 7. Water pipe; 8. Control box; 9. Gas collector; 10. Desulfurization net; 11. Cleaning liquid inlet pump; 12. Exhaust pipe; 13. First solenoid valve; 14. Return pipe; 15. Second solenoid valve; 16. Induced fan; 17. Cleaning liquid nozzle ; 18, air guide pipe; 19, gas quality sensor; 20, three-way valve; 21, standpipe; 22, negative pressure fan.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

As shown in Figures 1-3, the utility model provides a technical solution: a coal-fired flue gas desulfurization reaction tank based on the sodium-calcium double-alkali method, including a tank body 1, and the outer wall on one side of the tank body 1 is provided with loops up and down. The air port 2 and the air inlet 3, the gas flow meter 4 is installed inside the air inlet 3, the model of the gas flow meter 4 is NK-FS4001, and the other side of the outer wall of the tank body 1 is installed from bottom to top with a drain pump 6, control The tank 8 and the cleaning liquid inlet pump 11, the drain pump 6 are connected to the tank body 1 through the water pipe 7, and the inside of the tank body 1 is provided with a cleaning liquid nozzle 17, a desulfurization net 10 and an air collecting cylinder 9, and the bottom of the air collecting cylinder 9 is uniformly provided with The through hole 5 is convenient for exhaust gas to enter, and the inside of the gas collector 9 is provided with a vertical pipe 21 in sequence, and the upper end of the inner side of the gas collector 9 is installed with a negative pressure fan 22, and the negative pressure fan 22 is located directly above the vertical pipe 21, which is convenient for the exhaust gas to be discharged quickly. Filter, and the output end of the cleaning liquid inlet pump 11 is connected with the input end of the cleaning liquid nozzle 17, the top of the tank body 1 is connected with an air guide tube 18, and the inside of the air guide tube 18 is equipped with a gas quality sensor 19, and the gas quality sensor 19 The model is LTBJX-100, the top of the air guide pipe 18 is connected with the exhaust pipe 12 and the return pipe 14 through the three-way valve 20, the first solenoid valve 13 is installed inside the exhaust pipe 12, and the second electromagnetic valve 13 is installed inside the return pipe 14. Solenoid valve 15, the model of the first solenoid valve 13 and the second solenoid valve 15 are all ZSPC, the output end of gas flowmeter 4 and the output end of gas quality sensor 19 are all connected with the input end of control box 8 during work, and control box The output end of 8 is electrically connected to the input end of the first electromagnetic valve 13 and the input end of the second electromagnetic valve 15, and an induced draft fan 16 is installed on the return pipe 14, and the other end of the return pipe 14 is connected to the air return port 2 .

When in use, the exhaust gas enters the inside of the tank body 1 through the air inlet 3, and the gas flow meter 4 inside the air inlet 3 can detect the intake air volume and transmit the signal to the control box 8, and then the exhaust gas enters the vertical pipe through the through hole 5 21. The vertical pipe 21 limits the flow direction of the exhaust gas, and rises rapidly under the action of the negative pressure fan 22 to ensure that the exhaust gas enters the desulfurization network 10 stably, and filters the sulfur dioxide. The gas quality sensor 19 installed on the gas pipe 18 detects the gas and transmits the signal to the control box 8. If the index is qualified, the first electromagnetic valve 13 will be opened and the second electromagnetic valve 15 will be closed. If the index is unqualified, the first electromagnetic valve 13 will be closed. Open the second electromagnetic valve 15, and carry out backflow and secondary treatment through the action of the return pipe 14, so as to ensure the quality of the clean gas.

In summary, the utility model can be obtained by setting the tank body 1, the gas flow meter 4, the control box 8, the gas collecting cylinder 9, the exhaust pipe 12, the first solenoid valve 13, the return pipe 14, the second solenoid valve 15, the induced draft fan 16. Air guide pipe 18, gas quality sensor 19, three-way valve 20, standpipe 21 and negative pressure fan 22 solve the problem that the reaction tank does not fully absorb sulfur dioxide in the exhaust gas and lacks a flow guide mechanism inside the tank.

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is a relationship between these entities or operations. There is no such actual relationship or order between them. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes and modifications can be made to these embodiments without departing from the principle and spirit of the present invention , replacements and modifications, the scope of the present utility model is defined by the appended claims and their equivalents.

Claims (6)

1. a kind of coal-fired flue gas desulfurization reactor tank based on sodalime double alkali method, including tank body (1), it is characterised in that: tank body (1) one The outer wall of side is vertically disposed with gas returning port (2) and air inlet (3), and the other side outer wall of tank body (1) is equipped with draining from bottom to up (6), control cabinet (8) and cleaning solution intake pump (11) are pumped, draining pump (6) is connect by water pipe (7) with tank body (1), tank body (1) Be internally provided with cleaning solution spray head (17), desulfurization net (10) and gas collecting jar with ground-on cover plate (9), the output end of cleaning solution intake pump (11) with The input terminal of cleaning solution spray head (17) connects, and the top of tank body (1) is connected with gas-guide tube (18), and the top of gas-guide tube (18) passes through Three-way valve (20) is connected with exhaust pipe (12) and return pipe (14), and the inside of exhaust pipe (12) is equipped with the first solenoid valve (13), the inside of return pipe (14) is equipped with second solenoid valve (15).

2. a kind of coal-fired flue gas desulfurization reactor tank based on sodalime double alkali method according to claim 1, it is characterised in that: return It is equipped in flow tube (14) air-introduced machine (16), and the other end of return pipe (14) is connected with gas returning port (2).

3. a kind of coal-fired flue gas desulfurization reactor tank based on sodalime double alkali method according to claim 1, it is characterised in that: into The inside of port (3) is equipped with gas flowmeter (4), and the inside of gas-guide tube (18) is equipped with gaseous mass sensor (19).

4. a kind of coal-fired flue gas desulfurization reactor tank based on sodalime double alkali method according to claim 3, it is characterised in that: gas The output end of flowmeter body (4) and the output end of gaseous mass sensor (19) are connect with the input terminal of control cabinet (8), control The output end of case (8) and the input terminal of the first solenoid valve (13) and the input terminal of second solenoid valve (15) are electrically connected.

5. a kind of coal-fired flue gas desulfurization reactor tank based on sodalime double alkali method according to claim 1, it is characterised in that: collection The bottom of inflator (9) is uniformly provided with through-hole (5).

6. a kind of coal-fired flue gas desulfurization reactor tank based on sodalime double alkali method according to claim 1, it is characterised in that: collection The inside of inflator (9) is disposed with vertical tube (21), and gas collecting jar with ground-on cover plate (9) inner top side is equipped with negative-pressure air fan (22), and negative pressure wind Machine (22) is located at the surface of vertical tube (21).