CN214002820U

CN214002820U - Waste heat recovery type melamine feed bin device

Info

Publication number: CN214002820U
Application number: CN202023153867.0U
Authority: CN
Inventors: 王建峰; 杨晓丽; 毛永; 刘凤洁; 杜以凤
Original assignee: SHANDONG SHUNTIAN CHEMICAL GROUP CO Ltd
Current assignee: SHANDONG SHUNTIAN CHEMICAL GROUP CO Ltd
Priority date: 2020-12-24
Filing date: 2020-12-24
Publication date: 2021-08-20
Anticipated expiration: 2030-12-24

Abstract

The utility model discloses an exhaust heat recovery type melamine feed bin device, the structure sets up rationally, including adding wall water jacket, feed bin and washing tower heat transfer device, both ends are provided with feed inlet and discharge gate respectively about the feed bin, and vertical next door heat transfer body is installed to feed bin lower part inboard, and feed bin upper portion installation is provided with shale shaker formula heat exchanger, it has inner chamber and exocoel to add inside being formed with of wall water jacket, has seted up second water inlet and second delivery port on the wall water jacket lateral surface to add, be provided with heat transfer water entry and heat transfer water export on the washing tower heat transfer device, be fixed with the armor thermocouple on the feed inlet leading flank, the sleeve pipe is installed to armor thermocouple rear end, and the interior parcel of sleeve pipe has the heating rod. This waste heat recovery type melamine feed bin device through setting up shale shaker formula heat exchanger, vertical next door heat transfer body and washing tower heat transfer device, retrieves the heat energy that the melamine storage was given off when cooling, avoids the waste of heat energy.

Description

Waste heat recovery type melamine feed bin device

Technical Field

The utility model relates to a chemical production equipment field specifically is a waste heat recovery type melamine feed bin device.

Background

With the maturity, popularization and application of the third-generation energy-saving one-step gas-phase quenching melamine production process, the melamine production enterprises in China basically adopt the method for production, and the effective capacity of the melamine in China exceeds 200 ten thousand tons and the yield reaches about 160 ten thousand tons in 2019.

The one-step gas-phase quenching process for producing melamine is characterized by that in the course of crystallizing melamine in crystallizer to finished product intermediate tank a large quantity of process gas is existed all the time, and the main components of said process gas, NH3 and CO2 are easily reacted to produce ammonium carbamate crystal and contaminate melamine, so that the existent process adopts heat-tracing and heat-insulating measures in the melamine separation process. The temperature of the melamine finished product is as high as about 180 ℃ when the melamine finished product enters a finished product bin, the melamine product is an industrial intermediate product with extremely high purity requirement and extremely fine and light particles, the purity of qualified products is more than or equal to 99.5 percent, and the water content is less than or equal to 0.1 percent. Therefore, the melamine finished product can not be cooled by moving bed ventilation or water contact and other modes, and domestic melamine production enterprises mostly adopt a multi-bin mode to naturally cool the melamine finished product in the bin and then package the melamine finished product.

The existing melamine storage mode mainly has the following problems according to the actual operation condition: 1. from 180 ℃ to 120 ℃, a large amount of heat energy is wasted and cannot be recycled; 2. the finished melamine is stored in the storage bin, so that the heat dissipation effect of the storage bin is reduced by means of the wall, the storage bin needs to be cleaned regularly, and a large amount of finished melamine is wasted; 3. after the heat dissipation effect of the storage bin is reduced, high-temperature materials can enter the package frequently, and the problem that the package is scalded and people are scalded accidentally is caused.

In order to overcome the defects existing in the current market, the technology of improving the melamine recovery bin device is urgently needed, the safe operation of melamine recovery can be better ensured, and the development of the chemical industry is promoted.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a waste heat recovery type melamine feed bin device to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a waste heat recovery type melamine storage bin device is reasonable in structure arrangement and comprises a wall-adding water jacket, a storage bin and a washing tower heat exchange device, wherein a feed inlet and a discharge outlet are respectively arranged at the upper end and the lower end of the storage bin, a vertical dividing wall heat exchange body is arranged on the inner side of the lower portion of the storage bin, a vibrating screen type heat exchanger is arranged on the upper portion of the storage bin, a vibrating screen is arranged in the vibrating screen type heat exchanger, material channels are respectively formed between the vertical dividing wall heat exchange body and the vertical dividing wall heat exchange body as well as between the vertical dividing wall heat exchange body and the storage bin, an inner cavity and an outer cavity are formed in the wall-adding water jacket, a second water inlet and a second water outlet are formed in the outer side surface of the wall-adding water jacket, the inner cavity is communicated with the outer cavity through water spray holes, the inner cavity is respectively communicated with a second water inlet and a second water outlet, the second water outlet is connected with a first water inlet through a connecting pipe, and a second water inlet is connected with a heat exchange water outlet, the washing tower heat exchange device is provided with a heat exchange water inlet and a heat exchange water outlet, the heat exchange water inlet is connected with the first water outlet, an armored thermocouple is fixed on the front side surface of the feed inlet, a sleeve is installed at the rear end of the armored thermocouple, and a heating rod is wrapped in the sleeve.

Preferably, three vibrating screens are arranged in the vibrating screen type heat exchanger at equal intervals, and the directions of the two adjacent vibrating screens are opposite.

Preferably, the bottom of the bin is funnel-shaped, a discharge hole is formed in the center of the top of the bin, three vertical dividing wall heat exchange bodies which are distributed at equal intervals are installed on the inner side of the middle lower portion of the bin, the inner space of the bin is divided into four parts by the vertical dividing wall heat exchange bodies, and each part forms a material channel.

Preferably, the vertical dividing wall heat exchange body is of a zigzag plate-shaped structure, the vertical dividing wall heat exchange body corresponds to the wall-adding water jacket one by one, and the upper end and the lower end of the vertical dividing wall heat exchange body are respectively provided with a first water outlet and a first water inlet.

Preferably, the wall-adding water jacket is provided with three blocks, the wall-adding water jacket is fixedly arranged on the left side surface, the right side surface and the rear side surface of the storage bin, the wall-adding water jacket is communicated with the vertical partition wall heat exchange body, and the direction of water flow in the wall-adding water jacket is opposite to that in the vertical partition wall heat exchange body.

Preferably, the lower part of the partition plate between the inner cavity and the outer cavity is uniformly provided with water spray holes, the section of the inner cavity is in a U shape rotating by ninety degrees, and the outer cavity is positioned at the groove of the inner cavity.

Preferably, the sleeve pipe penetrates through the storage bin and extends into the material channel, and the sleeve pipe and the heating rod are coaxially arranged.

Compared with the prior art, the beneficial effects of the utility model are that: this waste heat recovery type melamine feed bin device, through setting up shale shaker formula heat exchanger, vertical dividing wall heat transfer body and washing tower heat transfer device, the heat energy of discharging when retrieving the melamine storage cooling, avoid the waste of heat energy, through setting up the vertical dividing wall heat transfer body with wall water jacket and zigzag, the reinforcing radiating effect, through setting up the armor thermocouple, sleeve pipe and heating rod, the clearance problem of armor thermocouple sleeve pipe melamine crystallization in process of production has been solved, avoid the armor thermocouple to measure the temperature along with the increase of production time problem more and more inaccurate, under the condition of having solved the preparation temperature measurement, the accuracy of melamine system control rises, production efficiency improves, the product qualification rate improves, thereby whole system's energy consumption has been reduced, energy saving and consumption reduction's purpose has been reached.

Drawings

FIG. 1 is a front view of the structure of the present invention;

FIG. 2 is a front view of the present invention;

fig. 3 is a schematic view showing the top view of the structure of the present invention.

In the figure: 1. the device comprises a feeding hole, 2, a vibrating screen type heat exchanger, 3, an armored thermocouple, 4, a wall-added water jacket, 5, a storage bin, 6, a connecting pipe, 7, a discharging hole, 8, a heat exchange water inlet, 9, a washing tower heat exchange device, 10, a heat exchange water outlet, 11, a vibrating screen, 12, a first water outlet, 13, a vertical dividing wall heat exchange body, 14, a material channel, 15, a water spray hole, 16, a first water inlet, 17, a second water inlet, 18, an inner cavity, 19, an outer cavity, 20, a second water outlet, 21, a sleeve, 22 and a heating rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: a waste heat recovery type melamine storage bin device comprises a wall-adding water jacket 4, a storage bin 5 and a washing tower heat exchange device 9, wherein a feed inlet 1 and a discharge outlet 7 are respectively arranged at the upper end and the lower end of the storage bin 5, a vertical dividing wall heat exchange body 13 is arranged on the inner side of the lower part of the storage bin 5, a vibrating screen type heat exchanger 2 is arranged at the upper part of the storage bin 5, a vibrating screen 11 is arranged in the vibrating screen type heat exchanger 2, three vibrating screens 11 are arranged in the vibrating screen type heat exchanger 2 at equal intervals, the directions of the two adjacent vibrating screens 11 are opposite, material channels 14 are respectively formed between the vertical dividing wall heat exchange body 13 and the vertical dividing wall heat exchange body 13, and between the vertical dividing wall heat exchange body 13 and the storage bin 5, heat energy discharged during melamine storage and temperature reduction is recovered by arranging the vibrating screen type heat exchanger 2, the vertical dividing wall heat exchange body 13 and the washing tower heat exchange device 9, waste of the heat energy is avoided, the vertical dividing wall heat exchange body 13 is of a zigzag plate structure, the vertical dividing wall heat exchange bodies 13 correspond to the wall-adding water jackets 4 one by one, the upper end and the lower end of each vertical dividing wall heat exchange body 13 are respectively provided with a first water outlet 12 and a first water inlet 16, the bottom of the storage bin 5 is funnel-shaped, the center of the top of the storage bin 5 is provided with a discharge hole 7, the inner side of the middle lower part of the storage bin 5 is provided with three vertical dividing wall heat exchange bodies 13 which are distributed at equal intervals, the vertical dividing wall heat exchange bodies 13 divide the inner space of the storage bin 5 into four parts, and each part forms a material channel 14;

an inner cavity 18 and an outer cavity 19 are formed inside the wall-adding water jacket 4, a second water inlet 17 and a second water outlet 20 are formed on the outer side surface of the wall-adding water jacket 4, three wall-adding water jackets 4 are arranged, the wall-adding water jacket 4 is fixedly arranged on the left side surface, the right side surface and the rear side surface of the storage bin 5, the wall-adding water jacket 4 is communicated with the vertical type dividing wall heat exchange body 13, the direction of water flow inside the wall-adding water jacket 4 and the direction of water flow inside the vertical type dividing wall heat exchange body 13 are opposite, the heat dissipation effect is enhanced by arranging the wall-adding water jacket 4 and the vertical type dividing wall heat exchange body 13 in a zigzag shape, the inner cavity 18 is communicated with the outer cavity 19 through the water spray holes 15, the inner cavity 18 and the outer cavity 19 are respectively communicated with the second water inlet 17 and the second water outlet 20, the water spray holes 15 are uniformly formed in the lower part of a partition plate between the inner cavity 18 and the outer cavity 19, the section of the inner cavity 18 is in a U shape rotated by ninety degrees, the outer cavity 19 is positioned at the groove of the inner cavity 18, the second water outlet 20 is connected with the first water inlet 16 through the connecting pipe 6, second water inlet 17 is connected with heat transfer water outlet 10, be provided with heat transfer water inlet 8 and heat transfer water outlet 10 on the washing tower heat transfer device 9, heat transfer water inlet 8 links together with first delivery port 12, be fixed with armoured thermocouple 3 on the 1 leading flank of feed inlet, sleeve pipe 21 is installed to armoured thermocouple 3 rear end, and the parcel has heating rod 22 in the sleeve pipe 21, sleeve pipe 21 passes in feed bin 5 stretches into material passageway 14, sleeve pipe 21 and the coaxial setting of heating rod 22, through setting up armoured thermocouple 3, sleeve pipe 21 and heating rod 22, the clearance problem of the sleeve pipe 21 melamine crystallization of armoured thermocouple 3 in the production process has been solved, avoid armoured thermocouple 3 at the problem of more and more inaccurate along with the increase temperature measurement of production time.

The working principle is as follows: when the waste heat recovery type melamine storage bin device is used, high-temperature melamine storage enters the storage bin 5 from the feeding hole 1, the high-temperature melamine storage falls on the vibrating screen 11, the vibrating screen 11 with different directions disperses melamine particles to improve the heat dissipation and heat exchange effects, the dispersed melamine uniformly falls into the material channel 14, meanwhile, the washing tower heat exchange device 9 injects heat exchange water into the second water inlet 17 of the wall-adding water jacket 4 through the heat exchange water outlet 10, water flow enters the inner cavity 18 and then enters the outer cavity 19 from the water spray hole 15, finally the water flow is injected into the first water inlet 16 through the second water outlet 20 and the connecting pipe 6, finally the heat exchange water is discharged into the heat exchange water inlet 8 from the first water outlet 12 through the vertical dividing wall heat exchange body 13, the melamine flows in the material channel 14 and exchanges heat with the vertical dividing wall heat exchange body 13, the heat energy released by the melamine is effectively recovered, and the waste of energy is avoided, because sleeve pipe 21 stretches into in the material passageway 14, armoured thermocouple 3 can detect the temperature at any time, starts heating rod 22 moreover and can clean sleeve pipe 21, solves the problem of melamine crystallization on sleeve pipe 21, obtains the melamine of cooling from discharge gate 7 at last, and this is the whole process of this waste heat recovery type melamine feed bin device work.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a waste heat recovery type melamine feed bin device, includes with wall water jacket (4), feed bin (5) and scrubbing tower heat transfer device (9), its characterized in that: the vertical dividing wall heat exchanger (13), the vibrating screen type heat exchanger (2) and the bin (5) are all formed with material channels (14) between the vertical dividing wall heat exchanger (13) and the bin (5), an inner cavity (18) and an outer cavity (19) are formed inside the wall-adding water jacket (4), a second water inlet (17) and a second water outlet (20) are formed on the outer side surface of the wall-adding water jacket (4), the inner cavity (18) is communicated with the outer cavity (19) through water spray holes (15), and the inner cavity (18) and the outer cavity (19) are respectively communicated with the second water inlet (17) and the second water outlet (20), the second water outlet (20) is connected with the first water inlet (16) through a connecting pipe (6), the second water inlet (17) is connected with a heat exchange water outlet (10), a heat exchange water inlet (8) and the heat exchange water outlet (10) are arranged on the washing tower heat exchange device (9), the heat exchange water inlet (8) is connected with the first water outlet (12), an armored thermocouple (3) is fixed on the front side surface of the feeding port (1), a sleeve (21) is installed at the rear end of the armored thermocouple (3), and a heating rod (22) is wrapped in the sleeve (21).

2. The waste heat recovery type melamine storage bin device according to claim 1, wherein: three vibrating screens (11) are arranged in the vibrating screen type heat exchanger (2) at equal intervals, and the directions of the two adjacent vibrating screens (11) are opposite.

3. The waste heat recovery type melamine storage bin device according to claim 1, wherein: the bottom of the storage bin (5) is funnel-shaped, a discharge hole (7) is formed in the center of the top of the storage bin (5), three vertical dividing wall heat exchange bodies (13) which are distributed at equal intervals are installed on the inner side of the middle lower portion of the storage bin (5), the vertical dividing wall heat exchange bodies (13) divide the inner space of the storage bin (5) into four parts, and each part forms a material channel (14).

4. The waste heat recovery type melamine storage bin device according to claim 1, wherein: the vertical dividing wall heat exchange body (13) is of a zigzag plate-shaped structure, the vertical dividing wall heat exchange body (13) corresponds to the wall-adding water jacket (4) one by one, and the upper end and the lower end of the vertical dividing wall heat exchange body (13) are respectively provided with a first water outlet (12) and a first water inlet (16).

5. The waste heat recovery type melamine storage bin device according to claim 1, wherein: the wall-adding water jacket (4) is provided with three blocks, the wall-adding water jacket (4) is fixedly arranged on the left side surface, the right side surface and the rear side surface of the storage bin (5), the wall-adding water jacket (4) is communicated with the vertical partition wall heat exchange body (13), and the direction of water flow in the wall-adding water jacket (4) is opposite to that in the vertical partition wall heat exchange body (13).

6. The waste heat recovery type melamine storage bin device according to claim 1, wherein: the lower part of the clapboard between the inner cavity (18) and the outer cavity (19) is evenly provided with water spray holes (15), the section of the inner cavity (18) is in a U shape rotating ninety degrees, and the outer cavity (19) is positioned at the groove of the inner cavity (18).

7. The waste heat recovery type melamine storage bin device according to claim 1, wherein: the sleeve (21) penetrates through the storage bin (5) and extends into the material channel (14), and the sleeve (21) and the heating rod (22) are coaxially arranged.