CN216703934U

CN216703934U - Limestone/lime-gypsum method desulphurization unit

Info

Publication number: CN216703934U
Application number: CN202220155385.9U
Authority: CN
Inventors: 姚磊; 沙金华
Original assignee: Jiangsu Shiqing Environmental Protection Technology Co ltd
Current assignee: Jiangsu Shiqing Environmental Protection Technology Co ltd
Priority date: 2022-01-20
Filing date: 2022-01-20
Publication date: 2022-06-10
Anticipated expiration: 2032-01-20

Abstract

The utility model provides a limestone/lime-gypsum method desulfurization device, which comprises a desulfurization tower, a slurry pool and a slurry circulating pump, wherein the desulfurization tower comprises a desulfurization tower flue gas inlet, a desulfurization tower flue gas outlet, a spraying layer and a communicating pipe; the slurry pool comprises a stirrer and a pressurized air inlet; the slurry tank and the desulfurizing tower are arranged in a separated mode, the slurry tank is arranged below the desulfurizing tower in a low position, the bottom of the desulfurizing tower is connected with the top of the slurry tank through a communicating pipe, the stirrer is installed at the top of the slurry tank in a jacking mode, the pressurized air inlet is formed in the bottom of the slurry tank, the slurry circulating pump comprises an inlet end and an outlet end, the inlet end is connected with the slurry tank through a first pipeline, and the outlet end is connected with the spraying layer of the desulfurizing tower through a second pipeline.

Description

Limestone/lime-gypsum method desulphurization unit

Technical Field

The utility model relates to the technical field of desulfurization, in particular to a limestone/lime-gypsum method desulfurization device.

Background

In the traditional limestone/lime-gypsum method desulfurization, a slurry tank is arranged at the bottom of a desulfurization tower conventionally, a side-feeding stirrer is adopted for stirring slurry, the material deposition at the bottom of the slurry tank is prevented, the main method of desulfurization slurry tank oxidation is a forced oxidation mode in the tower, oxidation air sent by an oxidation fan is sprayed to the front of the slurry stirrer by a spray gun, and the purpose of oxidation is achieved by fully contacting the oxidation air with the slurry by using the slurry stirrer. Firstly, the height of the desulfurizing tower is increased by about 8-10 meters because the slurry tank is arranged at the bottom of the desulfurizing tower, and the requirements of the desulfurizing tower on wind load, strength and the like which need to be overcome are high. Secondly, the slurry is stirred by adopting side feeding type stirring, the stirring effect is poor, the uniform distribution of oxidizing air is influenced, the oxidizing air is not fully utilized, the stirring seal is easy to leak, and the inspection and maintenance are difficult. And the third step, the oxidation fan occupies a large area, and meanwhile, the oxidation fan has high noise and noise pollution.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the utility model provides the limestone/lime-gypsum method desulfurization device which can reduce the investment of the desulfurization device, reduce the noise pollution on site of the desulfurization device and improve the running stability of the device.

In order to achieve the purpose, the utility model adopts the following technical scheme: a limestone/lime-gypsum method desulfurization device comprises a desulfurization tower, a slurry tank and a slurry circulating pump, wherein the desulfurization tower comprises a desulfurization tower flue gas inlet, a desulfurization tower flue gas outlet, a spraying layer and a communicating pipe; the slurry tank comprises a stirrer and a pressurized air inlet; the thick liquid pond with the desulfurizing tower separation sets up, thick liquid pond low-order is arranged the below of desulfurizing tower, the desulfurizing tower bottom is passed through the closed tube is connected the top in thick liquid pond, the agitator top is advanced the formula and is installed thick liquid pond top, pressurized air import sets up the bottom in thick liquid pond, the slurry circulating pump includes entrance point and exit end, the entrance point is connected through first pipeline the thick liquid pond, the exit end is connected through the second pipeline the desulfurizing tower sprays the layer.

Preferably, the desulfurizing tower still includes the desulfurizing tower bottom plate, the desulfurizing bottom plate sets up the interior bottom of desulfurizing tower, the desulfurizing tower bottom plate slope sets up, be equipped with first through-hole on the lateral wall of the lower extreme place desulfurizing tower of desulfurizing tower bottom plate, the one end of closed tube is connected first through-hole, the other end of closed tube with the top in thick liquid pond is connected.

Preferably, the bottom level in thick liquid pond is equipped with oxidation air distribution pipe, oxidation air distribution pipe's one end is the blind end, oxidation air distribution pipe's the other end with the pressurized air import is linked together, be equipped with air jet on the oxidation air distribution pipe, air jet sets up towards the top.

Preferably, the desulfurizing tower flue gas entry install the desulfurizing tower lower part, the desulfurizing tower flue gas entry sets up the below on layer sprays, the desulfurizing tower exhanst gas outlet install at the desulfurizing tower top.

Preferably, the desulfurizing tower flue gas entry includes the inlet tube, the desulfurizing tower exhanst gas outlet includes the outlet pipe, the inlet tube slope sets up, the lower extreme of inlet tube is fixed desulfurizing tower flue gas entry, the one end of outlet pipe is fixed desulfurizing tower exhanst gas outlet department, the outlet pipe level sets up.

Preferably, the agitator includes motor, puddler and stirring leaf, the motor is installed the top in thick liquid pond, the one end of puddler is fixed on the output shaft of motor, the puddler sets up vertically, the stirring leaf is fixed the lower extreme of puddler.

Preferably, the stirring leaf is the zigzag, the stirring leaf includes two parallel arrangement's first blade and connects the connecting rod of this first blade, the lower extreme of puddler is fixed the middle part of connecting rod, first stirring leaf vertical direction sets up.

Preferably, the spraying layer includes shower and grid plate, the shower level sets up in the desulfurizing tower, the one end of shower is connected the second pipeline, be equipped with the nozzle towards the below on the shower, the grid plate level sets up the below of shower.

Preferably, the first pipe is connected to a lower portion of the pulp chest.

Compared with the prior art, the utility model has the beneficial effects that: (1) the thick liquid pond tower sets up outward, and device simple structure has reduced the height of desulfurizing tower to reduce the wind-load that the desulfurizing tower need overcome, the height of desulfurizing tower is low, guarantees that the desulfurizing tower has higher intensity, has reduced the high requirement of too high desulfurizing tower to intensity, reduces the manufacturing cost and the investment of desulfurizing tower.

(2) The slurry pool stirrer adopts a jacking type, has good stirring effect, can ensure the uniform distribution of the oxidation air, is convenient to inspect and maintain, and ensures the long-period stable operation of the desulfurization device.

(3) And the pressurized air is used for replacing an oxidation fan, so that the noise pollution of a desulfurization site is reduced.

Drawings

Fig. 1 is a schematic structural diagram of a limestone/lime-gypsum method desulfurization device of the present invention.

Wherein: 1-a desulfurizing tower, 2-a slurry pool (oxidizing liquid), 3-a desulfurizing circulating pump, 31-an inlet end 32-an outlet end, 4-a desulfurizing tower bottom plate, 5-a communicating pipe, 6-a pressurized air inlet, 61-an oxidizing air distribution pipe, 62-an air nozzle, 7-a stirrer, 71-a motor, 72-a stirring rod, 73-a stirring blade, 731-a first blade, 732-a connecting rod, 81-a first pipeline, 82-a second pipeline, 9-a spraying layer, 91-a spraying pipe, 92-a grid plate, 10-a desulfurizing tower flue gas inlet and 11-a desulfurizing tower flue gas outlet.

Detailed Description

In order to further understand the objects, structures, features and functions of the present invention, the following embodiments are described in detail.

Referring to fig. 1, a limestone/lime-gypsum method desulfurization apparatus according to an embodiment of the present invention includes a desulfurization tower 1, a slurry tank 2 and a slurry circulating pump 3, wherein the desulfurization tower 1 includes a desulfurization tower flue gas inlet 10, a desulfurization tower flue gas outlet 11, a spray layer 9 and a communicating pipe 5; the slurry tank 2 comprises a stirrer 7 and a pressurized air inlet 6; slurry tank 2 with 1 separation setting of desulfurizing tower, slurry tank 2 low level is arranged the below of desulfurizing tower 1, 1 bottom of desulfurizing tower is passed through closed tube 5 is connected the top of slurry tank 2, the formula of advancing is installed in 7 tops of agitator slurry tank 2, pressurized air import 6 sets up slurry tank 2's bottom, slurry circulating pump 3 includes entrance point 31 and exit end 32, entrance point 31 connects through first pipeline 81 slurry tank 2, exit end 32 connects through second pipeline 82 the desulfurizing tower sprays layer 9. With the outer separation setting of 2 towers in thick liquid pond, the height of desulfurizing tower 1 has been shortened to very big degree to reduce the wind load that desulfurizing tower 1 need overcome, the height of desulfurizing tower is low, guarantees that desulfurizing tower 1 has higher intensity, has reduced the high requirement of too high desulfurizing tower to intensity, reduces the manufacturing cost and the investment of desulfurizing tower 1.

Desulfurizing tower 1 still includes desulfurizing tower bottom plate 4, desulfurizing bottom plate 4 sets up the interior bottom of desulfurizing tower 1, the slope of 4 certain angles of desulfurizing tower bottom plate sets up, be equipped with first through-hole on the lateral wall of the lower extreme place desulfurizing tower 1 of desulfurizing tower bottom plate 4, first through-hole is connected to the one end of closed tube 5, the other end of closed tube 5 with the top in thick liquid pond 2 is connected. Through the desulfurizing tower bottom plate 4 that the slope set up, the circulation thick liquid that conveniently falls into 1 bottom of desulfurizing tower flows into the thick liquid pond through the closed tube in, reoxidation recycles.

The bottom level of thick liquid pond 2 is equipped with oxidation air distribution pipe 61, the one end of oxidation air distribution pipe 61 is the blind end, oxidation air distribution pipe 61 the other end with pressurized air inlet 6 is linked together, be equipped with air jet 62 on the oxidation air distribution pipe 61, air jet 62 sets up towards the top. The oxidizing air distribution pipe 61 can be a straight pipe or a bow-shaped pipe, so that pressurized air can be uniformly distributed into the slurry tank 2 to oxidize slurry.

Desulfurizing tower flue gas entry 10 install 1 lower part in the desulfurizing tower, desulfurizing tower flue gas entry 10 sets up the below on layer 9 sprays, desulfurizing tower exhanst gas outlet 11 install at 1 top in the desulfurizing tower. Preferably, the desulfurization tower flue gas inlet 10 comprises an inlet pipe, the desulfurization tower flue gas outlet 11 comprises an outlet pipe, the inlet pipe is obliquely arranged, the lower end of the inlet pipe is fixed at the desulfurization tower flue gas inlet 10, one end of the outlet pipe is fixed at the desulfurization tower flue gas outlet 11, and the outlet pipe is horizontally arranged. The flue gas entering the desulfurizing tower 1 can be ensured to rise upwards and reversely contact with the slurry sprayed by the spraying layer 9.

Preferably, the stirrer 7 comprises a motor 71, a stirring rod 72 and a stirring blade 73, wherein the motor 71 is installed above the slurry tank 2, one end of the stirring rod 72 is fixed on an output shaft of the motor 71, the stirring rod 72 is vertically arranged, and the stirring blade 73 is fixed at the lower end of the stirring rod 72. The stirring blade 73 is in a zigzag shape, the stirring blade 73 comprises two first blades 731 arranged in parallel and a connecting rod 732 connected with the first blades, the lower end of the stirring rod 72 is fixed in the middle of the connecting rod 732, the first stirring blades 731 are arranged in the vertical direction, the stirring range of the first stirring blades 731 is large during stirring, and meanwhile, the connecting rod 732 is obliquely arranged to play a role in stirring. The stirrer 7 adopts a jacking type stirring effect, can ensure the uniform distribution of the oxidation air, is convenient to inspect and maintain, and ensures the long-period stable operation of the desulfurization device.

Preferably, the spraying layer 9 includes a spraying pipe 91 and a grating plate 92, the spraying pipe 91 is horizontally disposed in the desulfurization tower 1, one end of the spraying pipe 91 is connected to the second pipeline 82, a nozzle facing downward is disposed on the spraying pipe 91, and the grating plate 92 is horizontally disposed below the spraying pipe 91. The grid plate 92 can further disperse the slurry sprayed by the spray pipe 91 uniformly, and the rising flue gas can be fully contacted with the slurry reversely, so that the desulfurization efficiency of the desulfurization tower 1 is improved.

Preferably, the first pipe 81 is connected to the lower portion of the pulp chest 2. Guarantee that the thick liquid after abundant oxidation enters into the spray layer 9 of desulfurizing tower 1 downwards and sprays under the transport of slurry circulating pump 3, and the flue gas gets into and upwards moves to make flue gas and thick liquid reverse contact, improves the desulfurization efficiency of desulfurizing tower 1.

The pulp tank 2 is arranged outside the tower, and the absorption liquid is forcibly oxidized by using low-cost pressurized air. The slurry tank 2 is supplemented with fresh limestone/lime absorbent. The pressure of the pressurized air connected with the pressurized air inlet 6 is 0.05-0.15 MPa. The external slurry tank 2 is arranged at a low position (less than +/-0.00 m), namely the slurry tank 2 is positioned on the ground or below the water level in the actual arrangement.

The principle of the desulfurization external oxidation method and the device is as follows: the thick liquid of thick liquid pond 2 is spouted into desulfurizing tower 1 in through spraying layer 9 through thick liquid circulating pump 3, the thick liquid falls into desulfurizing tower 1 bottom after fully countercurrent contact with the flue gas, desulfurizing tower 1 bottom plate becomes certain inclination setting, guarantee that the circulation thick liquid of desulfurizing tower 1 bottom flows into thick liquid pond 2 through communicating pipe 5 automatically, thick liquid pond 2 needs low level to arrange (± 0.00m below), agitator 7 is equipped with at thick liquid pond 2 top, guarantee that 2 bottom materials of thick liquid pond are not sedimentary, be equipped with oxidation air distribution pipe 61 in thick liquid pond 2 bottom, the pressurized air who gets into thick liquid pond 2 bottom passes through distribution pipe 61 and gets into thick liquid pond 2, 7 agitator through thick liquid pond 2 spills oxidation air into tiny bubble, fully oxidize the thick liquid in thick liquid pond 2. The utility model changes the conventional oxidation method and process for desulfurization by limestone/lime-gypsum method, reduces the investment of the device and the noise generated by equipment operation, improves the operation reliability of the device, and ensures the long-period stable operation of the desulfurization device.

The present invention has been described in relation to the above embodiments, which are only exemplary of the implementation of the present invention. It should be noted that the disclosed embodiments do not limit the scope of the utility model. Rather, it is intended that all such modifications and variations be included within the spirit and scope of this invention.

Claims

1. A limestone/lime-gypsum method desulphurization unit which is characterized in that: the device comprises a desulfurizing tower, a slurry tank and a slurry circulating pump, wherein the desulfurizing tower comprises a desulfurizing tower flue gas inlet, a desulfurizing tower flue gas outlet, a spraying layer and a communicating pipe; the slurry tank comprises a stirrer and a pressurized air inlet; the thick liquid pond with the desulfurizing tower separation sets up, thick liquid pond low-order is arranged the below of desulfurizing tower, the desulfurizing tower bottom is passed through the closed tube is connected the top in thick liquid pond, the agitator top is advanced the formula and is installed thick liquid pond top, pressurized air import sets up the bottom in thick liquid pond, the slurry circulating pump includes entrance point and exit end, the entrance point is connected through first pipeline the thick liquid pond, the exit end is connected through the second pipeline the desulfurizing tower sprays the layer.

2. The limestone/lime-gypsum method desulfurization apparatus according to claim 1, characterized in that: the desulfurizing tower still includes the desulfurizing tower bottom plate, the desulfurizing tower bottom plate sets up the interior bottom of desulfurizing tower, the desulfurizing tower bottom plate slope sets up, be equipped with first through-hole on the lateral wall of the lower extreme place desulfurizing tower of desulfurizing tower bottom plate, the one end of closed tube is connected first through-hole, the other end of closed tube with the top in thick liquid pond is connected.

3. The limestone/lime-gypsum method desulfurization apparatus according to claim 1, characterized in that: the bottom level in thick liquid pond is equipped with oxidation air distribution pipe, oxidation air distribution pipe's one end is the blind end, oxidation air distribution pipe's the other end with the pressurized air import is linked together, be equipped with air jet on the oxidation air distribution pipe, air jet sets up towards the top.

4. The limestone/lime-gypsum method desulfurization apparatus according to claim 1, characterized in that: the desulfurizing tower flue gas entry install the desulfurizing tower lower part, the desulfurizing tower flue gas entry sets up the below on layer sprays, the desulfurizing tower exhanst gas outlet install at the desulfurizing tower top.

5. The limestone/lime-gypsum method desulfurization apparatus according to claim 4, characterized in that: the desulfurizing tower flue gas entry includes the inlet tube, the desulfurizing tower exhanst gas outlet includes the outlet pipe, the inlet tube slope sets up, the lower extreme of inlet tube is fixed desulfurizing tower flue gas entry, the one end of outlet pipe is fixed desulfurizing tower exhanst gas outlet department, the outlet pipe level sets up.

6. The limestone/lime-gypsum method desulfurization apparatus according to claim 1, characterized in that: the agitator includes motor, puddler and stirring leaf, the motor is installed the top in thick liquid pond, the one end of puddler is fixed on the output shaft of motor, the puddler is vertical to be set up, the stirring leaf is fixed the lower extreme of puddler.

7. The limestone/lime-gypsum method desulfurization apparatus according to claim 6, characterized in that: the stirring leaf is the zigzag, the stirring leaf includes two parallel arrangement's first blade and connects the connecting rod of this first blade, the lower extreme of puddler is fixed the middle part of connecting rod, the vertical direction setting of first blade.

8. The limestone/lime-gypsum method desulfurization apparatus according to claim 1, characterized in that: the spray layer comprises a spray pipe and a grating plate, the spray pipe is horizontally arranged in the desulfurization tower, one end of the spray pipe is connected with the second pipeline, nozzles facing downwards are arranged on the spray pipe, and the grating plate is horizontally arranged below the spray pipe.

9. The limestone/lime-gypsum method desulfurization apparatus according to claim 1, characterized in that: the first pipeline is connected to the lower part of the pulp tank.