CN210544967U

CN210544967U - Granulation forming device of calcium-based carbon dioxide adsorbent

Info

Publication number: CN210544967U
Application number: CN201921540632.1U
Authority: CN
Inventors: 胡迎超; 李海龙; 杨建平; 屈文麒; 渠明玉; 鹿红媛; 陈英杰
Original assignee: Central South University
Current assignee: Central South University
Priority date: 2019-09-17
Filing date: 2019-09-17
Publication date: 2020-05-19
Anticipated expiration: 2029-09-17

Abstract

The utility model discloses a granulation forming device of calcium-based carbon dioxide adsorbent. The device comprises a slurry dripping mechanism and a liquid drop solidifying mechanism, wherein the liquid drop solidifying mechanism is arranged below the slurry dripping mechanism; wherein: the slurry dripping mechanism comprises a slurry hopper, a motor, a connecting rod,The device comprises a connecting rod sleeve and a disturbance disc, wherein one end of a connecting rod is connected with a motor, the other end of the connecting rod is connected with the connecting rod sleeve, the disturbance disc is in threaded connection with the connecting rod sleeve through a screw hole, the disturbance disc is arranged at the upper part of a slurry hopper, and a heater is arranged on the wall surface of the slurry hopper; the liquid drop solidifying mechanism comprises a vertically arranged sleeve, and a funnel neck at the lower part of the slurry hopper extends into the sleeve; the upper part of the side wall of the sleeve is provided with a liquid inlet, and the bottom part of the side wall of the sleeve is provided with a liquid outlet and a material collecting hole; the sleeve is connected with a concentration monitor. The device of the utility model is simple in structure, ingenious in design, convenient to use can be used for the calcium-based adsorbent granulation shaping with powder attitude, promotes calcium-based adsorbent circulation fluidization desorption CO greatly₂Industrial application of (1).

Description

Granulation forming device of calcium-based carbon dioxide adsorbent

Technical Field

The utility model belongs to the technical field of the preparation and the improvement equipment of adsorbent, more specifically relates to a granulation forming device of calcium base carbon dioxide adsorbent.

Background

Carbon dioxide is a main component of greenhouse gases, and the large emission of carbon dioxide is considered to be the main cause of global warming. In order to reduce the emission of carbon dioxide gas, the inter-government climate change committee (IPCC) of united nations has especially recommended Carbon Capture and Sequestration (CCS) technology worldwide. In the technical route, CO is absorbed by using an adsorbent₂The fixation from the mixed gas is a key link for restricting the CCS technology. Therefore, efficient CO development₂The corresponding cyclic capture technology on adsorbent basis is of critical importance.

Calcium-based CO₂The adsorbent has attracted much attention due to its advantages of large adsorption capacity, high adsorption rate, cheap and easily available raw materials, etc. CO based on calcium based sorbents₂One of the most important implementations of the circulating capture system is the use of circulating fluidized bed technology. However, the calcium-based adsorbent in powder form is not suitable for use in a circulating fluidized bed system because the calcium-based adsorbent in powder form is easily carried away from the circulating system by the gas flow, resulting in a loss of the efficiency of the adsorbent and the system (elutriation phenomenon), and thus the adsorbent in powder form is not suitable for use in a circulating fluidized bed systemThe method is used in the system. The elutriation phenomenon can be effectively reduced by granulating and molding the powdery calcium-based adsorbent into the granular adsorbent, so that the CO of the whole system is improved₂The collection efficiency.

The granulation and molding of the powdery calcium-based adsorbent are research hotspots and difficulties in the field. The key to research and development of a simple, environment-friendly and efficient granulation forming device is whether the powdery calcium-based adsorbent can be efficiently formed and then is actually applied to industrial carbon capture. At present, the calcium-based adsorbent powder granulation molding method mainly comprises an extrusion method, a roller method and an extrusion rolling method. Extrusion processes are mainly used in conjunction with extruders to extrude powder adsorbents into cylindrical particles (Energy Fuels 2012, 26, 154-161); the tumbling method produces spherical particles from the sorbent powder, mainly in a "snowball" manner (Energy Fuels 2015, 29, 6636-6644); extrusion spheronization is the process of first making cylindrical particles by an extruder and then flattening the corners of the cylindrical particles into spheroidal particles by a spheronizer (Chemical Engineering Journal 285 (2016) 293-303). It can be seen that the existing calcium-based adsorbent powder granulation device is mainly a mechanical device and mainly depends on the action of mechanical force to achieve the purpose of powder granulation. The devices mainly have the defects of low energy consumption and low preparation efficiency, and the parameters of the extrusion device are complicated to set (particularly, the addition amount of water is difficult to control quantitatively). And the roller-like device is difficult to prepare small-sized particles and the strength of the adsorbent particles is poor. These severely restrict the industrial application of calcium-based sorbents.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects or the improvement requirements of the prior art, the utility model provides a granulation forming device of a calcium-based carbon dioxide adsorbent; the device has a simple structure, is convenient to operate, can simply, environmentally and efficiently granulate the powdery calcium-based adsorbent into spherical particles, and greatly improves the efficiency of large-scale application of the calcium-based adsorbent to the industrial decarburization of the circulating fluidized bed.

In order to achieve the above object, the utility model provides a granulation forming device of calcium-based carbon dioxide adsorbent, which comprises a slurry dripping mechanism and a liquid drop solidifying mechanism, wherein the liquid drop solidifying mechanism is arranged below the slurry dripping mechanism; wherein:

the slurry dripping mechanism comprises a slurry hopper, a motor, a connecting rod sleeve and a disturbance disc; one end of the connecting rod is connected with the motor, the other end of the connecting rod is connected with a connecting rod sleeve, the bottom of the connecting rod sleeve is in a screw rod shape, a screw hole is formed in the center of the disturbance disc, the disturbance disc is in threaded connection with the connecting rod sleeve through the screw hole, the disturbance disc is arranged in a horn mouth in the upper portion of the slurry hopper, and a heater is arranged on the wall surface of the slurry hopper; the liquid drop solidifying mechanism comprises a vertically arranged sleeve, and a funnel neck at the lower part of the slurry hopper extends into the sleeve; the upper part of the wall of the sleeve is provided with a liquid inlet, and the bottom part of the wall of the sleeve is provided with a liquid outlet and a material collecting hole; the sleeve is connected with a concentration monitor.

The utility model discloses in, the connecting rod passes through flat key and connecting rod muffjoint.

The utility model discloses in, be equipped with the arch on the disturbance dish.

In the utility model, the heater has one or a plurality of.

The utility model discloses in, feed liquor hole, play liquid hole and receipts material hole are cast structure respectively.

The utility model discloses in, be equipped with adjusting valve on feed liquor hole and the play liquid hole.

The utility model discloses in, still be equipped with spacing hole on the telescopic section of thick bamboo wall, spacing hole sets up in feed liquor hole below.

The utility model discloses in, spacing hole is cast structure.

In the utility model, calcium-based adsorbent powder, water and agar powder are contained in the slurry bucket; the sleeve is filled with dimethyl silicone oil.

Generally, through the utility model above technical scheme who conceives compares with prior art, has following advantage:

1. the utility model discloses a device mainly reaches the purpose of granulation balling-up through solidification adsorbent powder thick liquid drop, need not pass through strong mechanical force with the adsorbent powder through the extruder, and strong mechanical force need consume a large amount of energy usually, consequently the utility model discloses a granulation forming device compares in mechanical granulation forming device energy-conservation more.

2. The utility model discloses a device mainly utilizes the liquid drop solidification to reach the fashioned purpose of granulation, because the liquid drop has better sphericity usually, consequently the adsorbent sphericity that the granulation shaping obtained is also better, compares in the extruder with extrude the spheronization device and be more convenient for prepare the better adsorbent of sphericity, more is fit for the requirement of industrialization application.

3. The utility model discloses in, thick liquid dropwise add mechanism accessible control disturbs the driving disk degree of depth in the thick liquid hopper to and the rotation rate of disturbing the driving disk adjusts and controls the degree of consistency, dropwise add speed etc. of thick liquid, thereby control the fashioned speed of adsorbent granulation.

4. The utility model discloses in, liquid drop solidification mechanism is through the concentration monitor of setting and the ally oneself with of feed liquor hole, play liquid hole valve, the concentration of dimethyl silicon oil in the adjusting sleeve to make dimethyl silicon oil concentration satisfy the requirement of liquid drop solidification in setting for the within range, improved the liquid drop shaping rate.

Drawings

Fig. 1 is a schematic structural diagram of the calcium-based carbon dioxide adsorbent granulation molding device of the present invention.

The reference numbers in the figure are 1-motor, 2-connecting rod, 3-connecting rod sleeve, 4-bulge, 5-disturbance disc, 6-heater, 7-slurry bucket, 8-sleeve, 9-liquid inlet hole, 10-limiting hole, 11-liquid drop, 12-curing agent, 13-concentration monitor, 14-material collecting hole, 15-liquid outlet hole and 16-calcium-based adsorbent sphere.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

Fig. 1 is a schematic structural diagram of a calcium-based carbon dioxide adsorbent granulation molding apparatus according to an embodiment of the present invention. As shown in fig. 1, the apparatus includes a slurry dropping mechanism for the adsorbent slurry and a droplet solidifying mechanism disposed below and in communication with the slurry dropping mechanism.

Slurry dropwise add mechanism includes thick liquid fill 7, motor 1, connecting rod 2, connecting rod sleeve 3, disturbance dish 5 and heater 6, and wherein, thick liquid fill 7 are used for saving, mixes, heating thick liquid, and disturbance dish 5 sets up in the horn mouth on thick liquid fill 7 upper portions, and there is the screw at disturbance dish 5 center, and 3 bottoms of connecting rod sleeve are the screw rod shape, and disturbance dish 5 passes through dish center screw and 3 threaded connection of connecting rod sleeve. The connecting rod 2 is connected with the connecting rod sleeve 3 in the connecting rod sleeve 3 through a flat key. Adopt the mode of dismantling between disturbance dish 5 and connecting rod sleeve 5, connecting rod sleeve 3 and the connecting rod 2, be convenient for spare part's washing and change. The connecting rod 2 rotates under the control of the motor 1, and then drives the disturbance disc 5 to move correspondingly. The disturbance disc 5 is provided with the protrusions 4, so that disturbance can be increased in the rotating process, and the slurry is mixed more uniformly. Motor 1 is fixed on the support, and the accessible adjusts the height of motor, and then adjusts the degree of depth of disturbing disk 4 in thick liquid fill 7 to the feed liquor area of control dropwise add mechanism below and then control thick liquid dropwise add speed.

The wall surface of the bell mouth at the upper part of the slurry bucket 7 is provided with two or four heaters 6, which are used for heating the slurry to a proper temperature to liquefy the agar into a colloid shape, and each heater 6 can be distributed on one side of the slurry bucket 7, or symmetrically distributed on two sides, or asymmetrically distributed on the side surfaces in different directions.

The liquid drop solidifying mechanism comprises a sleeve 8, a liquid inlet hole 9, a liquid outlet hole 15 and a material collecting hole 14; the funnel neck at the lower part of the slurry hopper 7 extends into the sleeve 8, and the liquid inlet hole 9, the liquid outlet hole 15 and the material receiving hole 14 are of tubular structures. The sleeve 8 is used for containing a curing agent 12 and providing a space for curing, granulating and molding the liquid drops 11, and the curing agent 12 is dimethyl silicone oil. The liquid inlet hole 9 is used for filling dimethyl silicone oil into the sleeve 8; the liquid outlet 15 is used for discharging low-concentration dimethyl silicone oil; the material receiving hole 14 is used for receiving the solidified and molded calcium-based adsorbent spheres 16; the liquid inlet hole 9 and the liquid outlet hole 15 are provided with regulating valves for controlling the liquid inlet speed and the liquid outlet speed.

A sleeve 8 of the liquid drop solidification mechanism is also provided with a limiting hole 10, and the limiting hole 10 is of a tubular structure; the limiting hole 10 is used for preventing the liquid level in the sleeve from being too high, redundant liquid is discharged when the liquid level is too high, and meanwhile, the limiting hole 10 is directly communicated with the atmosphere, so that the balance of the air pressure inside and outside the sleeve is ensured.

The height of each through hole on the sleeve 8 in the vertical direction has certain requirements, and the liquid inlet hole 9 is higher than the limiting hole 10 and is positioned at the high position of the sleeve 8 in the vertical direction. The liquid outlet hole 15 and the material receiving hole 14 are positioned at the lower part of the sleeve 8 in the vertical direction and are lower than the limiting hole 10. The through holes on the sleeve 8 may be distributed on one side of the sleeve, or symmetrically distributed on both sides, or asymmetrically distributed on the side surfaces in different directions.

The sleeve 8 of the droplet solidification mechanism is connected with a concentration monitor 13. The concentration monitor 13 is used for detecting the concentration of the simethicone in the sleeve 8, and is of the type HBD5-MS 1204. After the concentration is reduced to the early warning value, the liquid inlet hole 9 is opened to inject fresh dimethyl silicon oil, and the liquid outlet hole 15 is opened to discharge low-concentration liquid, so that the concentration of the dimethyl silicon oil in the sleeve is suitable for solidifying liquid drops. The concentration monitor 13 is vertically lower than the limiting hole 10.

Through the scheme, the calcium-based adsorbent powder, the water and the agar powder are added into the slurry hopper 7 to be mixed and then dripped into the sleeve 8, the sleeve 8 contains the dimethyl silicone oil, the high-temperature calcium-based adsorbent liquid drop is rapidly cooled in the normal-temperature dimethyl silicone oil, and meanwhile, due to the action of the hydrophobicity and the surface tension of the dimethyl silicone oil, the adsorbent liquid drop is rapidly solidified to form spherical solid particles, so that the purpose of granulation molding is achieved.

In the examples, the calcium-based adsorbent powder is Li₄SiO₄Powder, by Li₄SiO₄Colloid-like slurry formed by mixing powder and agar powder in water has different coagulability at different temperatures, is not easy to coagulate at high temperature (-100 ℃) and is in a colloid shape, and can be rapidly solidified at low temperature (normal temperature), and Li is rapidly solidified by utilizing the characteristic₄SiO₄Solidification of spherical droplets into spherical Li₄SiO₄An adsorbent. Meanwhile, the water in the liquid drops is separated quickly by utilizing the hydrophobicity of the grease, and the formation of the spherical adsorbent is strengthened.

It will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

Claims

1. A granulation forming device of a calcium-based carbon dioxide adsorbent is characterized by comprising a slurry dripping mechanism and a liquid drop solidifying mechanism, wherein the liquid drop solidifying mechanism is arranged below the slurry dripping mechanism; wherein:

2. The apparatus for granulating and forming a calcium-based carbon dioxide adsorbent as set forth in claim 1, wherein the connecting rod is connected to the connecting rod bushing by a flat bond.

3. The apparatus for granulating and forming a calcium-based carbon dioxide adsorbent as set forth in claim 1, wherein the disturbing plate is provided with projections.

4. The apparatus for granulating and forming an adsorbent for calcium-based carbon dioxide as set forth in claim 1, wherein the number of the heaters is one or more.

5. The apparatus for granulating and forming a calcium-based carbon dioxide adsorbent as claimed in claim 1, wherein the inlet hole, the outlet hole and the outlet hole are each of a tubular structure.

6. The apparatus for granulating and forming a calcium-based carbon dioxide adsorbent as claimed in claim 5, wherein the liquid inlet and outlet holes are provided with regulating valves.

7. The apparatus for granulating and forming a calcium-based carbon dioxide adsorbent as claimed in claim 1, wherein the wall of the sleeve is further provided with a limiting hole, and the limiting hole is disposed below the liquid inlet hole.

8. The apparatus for granulating and forming a calcium-based carbon dioxide adsorbent as claimed in claim 7, wherein the limiting hole has a tubular structure.

9. The granulation molding apparatus for calcium-based carbon dioxide adsorbent as set forth in claim 1, wherein the slurry hopper contains calcium-based adsorbent powder, water and agar powder; the sleeve is filled with dimethyl silicone oil.