阅读说明：本技术 一种高效石灰消化除渣装置 (High-efficient lime slaking dross removal mechanism ) 是由 岳琳 樊彦玲 陈贵福 郑鹏辉 沈建涛 谭光之 祝文 许荣胜 于 2019-10-21 设计创作，主要内容包括：本发明公开了一种高效石灰消化除渣装置,包括罐体,罐体固定安装于支架上,罐体的顶部设有搅拌装置、石灰进料口和排气口,搅拌装置位于罐体的中心位置,排气口位于远离石灰进料口的一侧,罐体的侧壁设有水冷壁,水冷壁的下部设有能供外部水源连接的进水口,水冷壁的上部设有与罐体内部连通的出水口,罐体远离于石灰进料口一侧的侧壁上部设有溢浆口,出水口的设置高度高于溢浆口的设置高度,溢浆口的进浆一侧设有滤网,滤网配备有振动电机,罐体的底部设有排渣口。采用本发明,既能避免杂质及未反应完全的石灰结块溢流出罐体,保证出料的品质,又能在向石灰消化反应提供用水的同时,实现罐内降温,促进石灰消化反应的正向进行。(The invention discloses a high-efficiency lime digestion deslagging device, which comprises a tank body, wherein the tank body is fixedly arranged on a support, the top of the tank body is provided with a stirring device, a lime feeding hole and an exhaust hole, the stirring device is positioned at the center of the tank body, the exhaust hole is positioned at one side far away from the lime feeding hole, the side wall of the tank body is provided with a water-cooling wall, the lower part of the water-cooling wall is provided with a water inlet which can be connected with an external water source, the upper part of the water-cooling wall is provided with a water outlet communicated with the inside of the tank body, the upper part of the side wall of the tank body, which is far away from the lime feeding hole, is provided with a slurry overflow hole, the arrangement height of the water outlet. By adopting the invention, impurities and unreacted lime blocks can be prevented from overflowing out of the tank body, the quality of discharged materials is ensured, and the temperature in the tank can be reduced while water is supplied for the lime digestion reaction, so that the forward progress of the lime digestion reaction is promoted.)

1. The efficient lime digestion deslagging device is characterized by comprising a tank body, wherein the tank body is fixedly arranged on a support, a stirring device, a lime feeding hole and an exhaust hole are arranged at the top of the tank body, the stirring device is positioned at the central position of the tank body, the exhaust hole is positioned at one side far away from the lime feeding hole, a water-cooling wall is arranged on the side wall of the tank body, a water inlet capable of being connected with an external water source is formed in the lower part of the water-cooling wall, a water outlet communicated with the inside of the tank body is formed in the upper part of the water-cooling wall, a slurry overflow hole is formed in the upper part of the side wall, far away from the lime feeding hole, of the tank body, the setting height of the water outlet is higher than the setting height of the slurry overflow hole, a filter screen is.

2. The slag removing device for lime slaking of claim 1, wherein the water-cooled wall is a double-wall plate structure, and a water storage cavity is left between the double-wall plates.

3. The high-efficiency lime digestion deslagging device of claim 1, wherein the screen is equipped with a vibration motor, the vibration motor is fixed on the top of the tank body, and the power output end of the vibration motor is connected with the screen through a rod.

4. The apparatus for removing slag of lime slaking according to claim 1, wherein the water-cooled wall is provided at a lower portion thereof with a drain port for draining water in the water-cooled wall to the outside.

5. The efficient lime digestion deslagging device of claim 1, wherein a flow guide plate is fixedly arranged on the inner wall of the top of the tank body, and the flow guide plate is positioned between the lime feeding hole and the stirring device.

6. The slag removing device for lime slaking according to claim 1, wherein the water outlet is provided in plurality and distributed annularly along the upper periphery of the water-cooled wall.

7. The high efficiency lime digestion deslagging apparatus of claim 1, wherein the side wall of the tank body is provided with a manhole through which an operator can enter the interior of the tank body and an observation hole through which the operator can observe the interior of the tank body.

8. The apparatus for removing slag of lime slaking of claim 1, wherein a baffle is provided inside the exhaust port.

9. The efficient lime digestion deslagging device of claim 1, wherein the stirring device comprises a stirring motor, a speed reducer, a stirring shaft and a stirring paddle, the stirring motor and the speed reducer are installed at the center of the outer side of the top of the tank body, the stirring motor is connected with the stirring shaft through the speed reducer, the stirring shaft is vertically placed and arranged inside the tank body, and the lower end of the stirring shaft is connected with the stirring paddle.

10. The slag removing device for lime slaking according to any of claims 1 to 9, wherein a liquid level sensor for monitoring the liquid level in the tank, a density meter for monitoring the density of the slaked lime slurry and a thermocouple for monitoring the lime slaking temperature are further provided in the tank body.

Technical Field

The invention relates to a flue gas desulfurization system in the field of environmental engineering, in particular to a high-efficiency lime slaking deslagging device.

Background

According to a letter (environment-friendly letter [2018] 242) of opinions about seeking working schemes (solicited lectures) for ultralow emission modification of iron and steel enterprises in 2018, the sulfur dioxide emission limit value of the iron and steel sintering industry is adjusted to 35mg/Nm3, and in 2019, the opinion about promoting implementation of ultralow emission of the iron and steel industry (environment-friendly letter [2019] 35) is further clarified, before 2020, ultralow emission modification of iron and steel enterprises in key areas is completed by 60% of capacity, and before 2025, ultralow emission modification of iron and steel enterprises in key areas is basically completed, and nationally strives for more than 80% of capacity to complete modification.

Semi-dry desulphurization is the first choice in the steel industry at present, and the treatment of the raw material lime (CaO) is of great importance. Due to different lime raw material quality, reaction conditions and the like, lime cannot fully react after meeting water, and slaked lime (CaOH) slurry after reaction often contains a large amount of unreacted lime caking and large particle impurities which cannot react, so that the quality of discharged materials is seriously influenced, and the desulfurization efficiency is reduced.

The process of slaking lime to generate hydrated lime required for desulfurization is an exothermic reaction, the internal temperature of the slaker is too high, even can reach more than 70 ℃, the condition is not favorable for forward running of the slaking reaction, and the slaking effect is poor.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the utility model provides a high-efficient lime slaking dross removal mechanism, can solve the problem that the ejection of compact impurity that provides is many and reaction temperature is too high among the above-mentioned background art.

In order to solve the technical problems, the invention provides a high-efficiency lime digestion deslagging device which comprises a tank body, wherein the tank body is fixedly arranged on a support, a stirring device, a lime feeding hole and an exhaust hole are arranged at the top of the tank body, the stirring device is positioned at the center of the tank body, the exhaust hole is positioned at one side far away from the lime feeding hole, a water-cooling wall is arranged on the side wall of the tank body, a water inlet capable of being connected with an external water source is formed in the lower part of the water-cooling wall, a water outlet communicated with the inside of the tank body is formed in the upper part of the water-cooling wall, a slurry overflow hole is formed in the upper part of the side wall of the tank body far away from the lime feeding hole, the setting height of the water outlet is higher than that of the slurry overflow hole, a filter screen is arranged.

As the preferable scheme of the invention, the water-cooled wall is of a double-wall plate structure, and a water storage cavity is reserved between the double-wall plates.

As a preferable scheme of the invention, the filter screen is provided with a vibration motor, the vibration motor is fixed at the top of the tank body, and the power output end of the vibration motor is connected with the filter screen through a rod piece.

In a preferred embodiment of the present invention, a drain port capable of draining water in the waterwall to the outside is provided at a lower portion of the waterwall.

As the preferable scheme of the invention, a guide plate is fixedly arranged on the inner wall of the top of the tank body and is positioned between the lime feeding hole and the stirring device.

As a preferable scheme of the invention, a plurality of water outlets are arranged and annularly distributed along the periphery of the upper part of the water-cooled wall.

As a preferable scheme of the invention, the side wall of the tank body is provided with a manhole for an operator to enter the tank body and an observation hole for the operator to observe the tank body.

In a preferred embodiment of the present invention, a baffle is provided inside the exhaust port.

As a preferable scheme of the present invention, the stirring device includes a stirring motor, a speed reducer, a stirring shaft and a stirring paddle, the stirring motor and the speed reducer are installed at the center of the outer side of the top of the tank body, the stirring motor is connected with the stirring shaft through the speed reducer, the stirring shaft is vertically placed and placed inside the tank body, and the lower end of the stirring shaft is connected with the stirring paddle.

In a preferable scheme of the invention, a liquid level sensor for monitoring the liquid level in the tank, a density meter for monitoring the density of the slaked lime slurry and a thermocouple for monitoring the slaked lime temperature are further arranged in the tank body.

Compared with the prior art, the high-efficiency lime slaking deslagging device provided by the invention has the beneficial effects that:

according to the invention, the filter screen is arranged on the pulp inlet side (namely, the overflow area) of the pulp overflow port, so that impurities and unreacted lime blocks are effectively prevented from overflowing out of the tank body, and the quality of discharged materials is ensured; the lime which is not completely reacted is blocked by the filter screen and returns to the digestion zone for continuous reaction until the lime overflows after meeting the requirements; the blocked impurities do not react and are discharged through a slag discharge port arranged at the bottom of the tank after being continuously precipitated; meanwhile, the water cooling wall is arranged on the side wall of the tank body, and the water cooling wall is used as a water replenishing system in the tank to supply water for the lime digestion reaction and used as an equipment cooling system to reduce the temperature in the tank and promote the forward progress of the lime digestion reaction. In addition, the invention has the advantages of compact structure, small equipment volume, small occupied area and convenient installation and operation.

Drawings

FIG. 1 is a front view of a high-efficiency lime slaking deslagging apparatus provided by the present invention;

FIG. 2 is a top view of a high-efficiency lime slaking deslagging apparatus provided in the present invention;

in the figure, 1, a lime feeding hole; 2. a tank body; 3. a water outlet; 4. a blanking area; 5. an observation hole; 6. a water cooled wall; 7. a baffle; 8. a digestion reaction zone; 9. a water inlet; 10. a support; 11. a slag discharge port; 12. a stirring paddle; 13. a water outlet; 14. a manhole; 15. a stirring shaft; 16. filtering with a screen; 17. a slurry overflow port; 18. an overflow area; 19. an exhaust pipe; 20. a baffle plate; 21. an exhaust port; 22. a vibration motor; 23. a speed reducer; 24. a stirring motor.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, it should be understood that the terms "central", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., used herein are used in the orientation or positional relationship indicated in the drawings, which are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be understood that the terms "mounted," "connected," and "connected" are used broadly and are defined as, for example, either fixedly connected, detachably connected, or integrally connected, unless otherwise explicitly stated or limited; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 and 2, in a preferred embodiment of the present invention, a high-efficiency lime digestion deslagging apparatus includes a tank 2, the tank 2 is fixedly mounted on a support 10, a stirring apparatus, a lime feeding port 1 and an exhaust port 21 are disposed at the top of the tank 2, the stirring apparatus is located at the center of the tank 2, the exhaust port 21 is located at one side far away from the lime feeding port 1, a water-cooled wall 6 is disposed on the side wall of the tank 2, a water inlet 9 capable of being connected with an external water source is disposed at the lower part of the water-cooled wall 6, a water outlet 3 communicated with the inside of the tank 2 is disposed at the upper part of the water-cooled wall 6, a slurry overflow port 17 is disposed at the upper part of the side wall of the tank 2 far away from the lime feeding port 1, the water outlet 3 is disposed at a height higher than the slurry overflow port 17, a filter screen 16 is disposed at the, the bottom of the tank body 2 is provided with a slag discharge port 11.

Therefore, in the embodiment of the invention, the filter screen 16 is arranged on the pulp inlet side (namely the overflow area 18) of the pulp overflow port 17, so that impurities and unreacted lime blocks are effectively prevented from overflowing out of the tank body 2, and the quality of discharged materials is ensured; lime which is not completely reacted is blocked by the filter screen 16 and returns to the digestion zone for continuous reaction until the lime overflows after meeting the requirements; the blocked impurities do not react and are discharged through a slag discharge port 11 arranged at the bottom of the tank after continuous precipitation; meanwhile, the water cooling wall 6 is arranged on the side wall of the tank body 2, and the water cooling wall is used as a water replenishing system in the tank to supply water for the lime digestion reaction and used as an equipment cooling system to reduce the temperature in the tank and promote the forward progress of the lime digestion reaction.

Exemplarily, the water-cooling wall 6 is of a double-wall plate structure, a water storage cavity is reserved between the double-wall plates, water can surround the tank body 2 for a circle after being filled with the water storage cavity, the temperature in the tank is reduced, the high efficiency of lime digestion reaction is ensured, and the structure is simple and easy to realize.

Illustratively, the filter screen 16 is preferably a 200-mesh filter screen, which effectively ensures the quality of the discharged material. The filter screen 16 is provided with a vibration motor 22, so that the filter screen 16 can be cleaned by vibration regularly, and the service life of the filter screen 16 is prolonged. In this embodiment, the vibration motor 22 is fixed on the top of the tank body 2, and the power output end of the vibration motor 22 is connected with the filter screen 16 through a rod.

Illustratively, the lower part of the water-cooled wall 6 is provided with a water outlet 13 which can discharge water in the water-cooled wall 6 to the outside.

Exemplarily, a guide plate 7 is fixedly arranged on the inner wall of the top of the tank body 2, and the guide plate 7 is positioned between the lime feeding hole 1 and the stirring device. Therefore, lime powder enters a digestion reaction zone 8 at the lower part of the tank body 2 through the blanking zone 4 under the guiding action of the guide plate 7.

Illustratively, the water outlets 3 are arranged in a plurality and annularly distributed along the periphery of the upper part of the water-cooled wall 6, so that the phenomenon of obvious difference of dry and wet areas can be avoided, and the generation of lime caking is effectively reduced.

Illustratively, in order to facilitate the maintenance, repair and daily observation of the inside of the tank body 2 by an operator, the side wall of the tank body 2 is provided with a manhole 14 for the operator to enter the inside of the tank body 2 and an observation hole 5 for the operator to observe the inside of the tank body 2. When the device needs maintenance after long-term operation, operating personnel can enter from the manhole 14 and thoroughly clean the inside of the tank body 2, and various residues can be discharged from the slag discharge port 11.

Illustratively, in order to ensure that hot steam generated by a digestion reaction can flow out of the tank body 2 in time, an exhaust port 21 is arranged at the top of the tank body 2 and is led out by an exhaust pipe 19, a baffle 20 is arranged inside the exhaust port 21, the baffle 20 can continuously change the flow direction of water vapor, fine particles contained in the hot steam are blocked to return into the tank body 2 for continuous reaction or sink into the tank bottom for discharge, and adverse effects of the steam on subsequent pipelines and equipment are reduced. It should be noted that the exhaust port 21 cannot be provided near the feed inlet to prevent feed from being carried out with the air stream and above the screen 16 to prevent fine particulate impurities from falling into the slaked lime slurry that is about to overflow.

Exemplarily, for guaranteeing that lime is fully digested, high-efficient lime digestion dross removal mechanism disposes agitating unit, agitating unit includes agitator motor 24, reduction gear 23, (mixing) shaft 15 and stirring rake 12, agitator motor 24 and reduction gear 23 are installed the top outside center of jar body 2, agitator motor 24 passes through reduction gear 23 with (mixing) shaft 15 is connected, stirring shaft 15 is vertical the placing and arranges in the inside of jar body 2, the lower extreme of (mixing) shaft 15 with stirring rake 12 is connected.

Illustratively, a liquid level sensor, a densimeter and a thermocouple are further arranged in the tank body 2, the liquid level sensor is arranged in a height difference area between the water outlet 3 and the slurry overflow port 17, the densimeter is arranged at the slurry overflow port 17, and the thermocouple is arranged in the digestion reaction area 8 of the tank body 2. The liquid level sensor is used for monitoring the liquid level in the tank, and reducing the inflow when the liquid level is higher than or close to a limit value; the density meter is used for monitoring the density of the hydrated lime slurry, and when the density of the hydrated lime slurry is too large or too small, the concentration of the slurry at the slurry overflow port 17 can be adjusted by controlling the liquid flow and the feeding equipment at the front section of the lime feed port 1, so that the quality of discharged materials is ensured; the thermocouple is used for monitoring lime slaking temperature, is convenient for keep the optimum temperature with lime slaking reaction, and when the temperature is too high, thereby can increase the inflow and improve the cooling effect of water-cooled wall 6.

In addition, the pressure control device and the flow control device are arranged on the water inlet side of the water inlet 9, and an operator can control the pressure and the flow of water inlet into the tank according to the working condition of lime digestion reaction.

The working principle of the high-efficiency lime digestion deslagging device provided by the embodiment of the invention is as follows: starting the stirring motor 24 to drive the stirring shaft 15 and the stirring paddle 12 to rotate; the water inlet 9 is connected with an external water source, the water inlet capacity is controlled by a pressure and flow control device, so that water is gradually supplemented into the cavity of the water-cooled wall 6, and after the water-cooled wall 6 is filled, the water enters a digestion reaction zone 8 in the tank body 2 through a water outlet 3 arranged at the upper part of the water-cooled wall 6 and is subjected to digestion reaction with lime; lime powder is fed from a lime powder bin and then enters the tank body 2 through the lime feeding hole 1, and the lime powder enters the digestion reaction area 8 at the lower part of the tank through the feeding area 4 under the guiding action of the guide plate 7; the lime and the water are fully mixed and reacted through the stirring paddle 12 arranged in the digestion reaction zone 8, the reaction is continuously exothermic, and meanwhile, cold water is continuously supplemented into the water-cooled wall 6, so that the equipment is cooled; with the input of lime and water, slaked lime slurry is generated in the slaking reaction zone 8, and the liquid level gradually rises along with the increase of the raw materials and approaches the overflow zone 18; the slaked lime slurry after the reaction is filtered by a filter screen 16, most of lime caking which is not completely reacted and impurities which can not be reacted are removed, and then the slaked lime slurry overflows out of the tank body 2 through a slurry overflow port 17 and enters subsequent related equipment through a pipeline. The unreacted quicklime blocks return to the digestion reaction zone 8 to react again until the reaction is complete; the impurities which can not react gradually sink into the tank bottom and are periodically discharged out of the tank through a slag discharge port 11 arranged at the tank bottom.

In conclusion, the high-efficiency lime slaking deslagging device provided by the embodiment of the invention can prevent impurities and unreacted lime blocks from overflowing out of the tank body, and ensure the quality of discharged materials; the cooling in the tank can be realized while water is provided for the lime digestion reaction, and the forward progress of the lime digestion reaction is promoted; has the advantages of compact structure, small equipment volume, small occupied area and convenient installation and operation.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.