CN212309430U - Continuous online urea solution batching system and solid feeding assembly thereof - Google Patents

Abstract

The utility model discloses a continuous online feed proportioning system of urea solution and solid feeding subassembly thereof belongs to flue gas denitration reductant system technical field. The solid feeding component comprises a hopper and a feeding amount detector, the outlet side of the hopper is connected with a rotary feeder, and one side of the rotary feeder, which is far away from the hopper, is fixedly connected with a gas-solid mixer. The utility model also provides a continuous online feed proportioning system of urea solution, including the batching jar, fixedly connected with solid feeding subassembly on the batching jar, it has liquid feeding subassembly to still communicate on the batching jar. And a stirring part and a heating part are arranged in the batching tank. The utility model discloses the utilization can carry out quantitative transmission and accurate measurement to solid material, through with water proportional synchronization transmission to batching jar in, can realize the continuous online batching to urea solution, realize joining in marriage promptly, is favorable to reducing equipment cost, improves and prepares efficiency, reduces the area of equipment.

Description

Continuous online urea solution batching system and solid feeding assembly thereof

Technical Field

The utility model relates to a continuous online feed proportioning system of urea solution and solid feeding subassembly thereof belongs to flue gas denitration reductant system technical field.

Background

In a system for carrying out denitration treatment on flue gas, ammonia is a commonly used reducing agent, and the removal efficiency of nitric oxide in the flue gas is highest. The ammonia used in the system is usually obtained by hydrolysis/pyrolysis of urea, and the urea solution used in the hydrolysis/pyrolysis process of urea is usually prepared from dry urea and water under the action of certain heat. The traditional dosing method of urea solution mainly comprises the following steps:

the method comprises the following steps: adding desalted water into the dissolving tank to a target water level, and heating the desalted water, wherein the time for adding water and heating is about 1-2 hours;

step two: lifting dry urea by using a bucket lifter, pouring the dry urea into a dissolving tank, starting a stirrer and a dissolving pump, realizing self circulation of the solution in the tank through a self-circulation channel and a circulation pipe of the dissolving pump, stopping feeding when a densimeter on the circulation pipe shows that the target density is reached, and consuming about 1-2 hours in the feeding and circulating stirring processes;

step three: and switching a channel behind the dissolving pump to the storage tank, and conveying the urea solution into the storage tank, wherein the conveying process takes about 1-2 hours.

The above-mentioned batching process is interrupted and is gone on, 3-6 hours consuming time of batching at every turn, and the procedure is loaded down with trivial details, for satisfying the demand of flue gas denitration system to ammonia, the limited design of dissolving tank is great, and the batching satisfies 20-24 hours's denitration quantity generally once, consequently, dissolving tank's volume is great, highly higher, when feeding to dissolving tank, need adopt the bucket to carry the machine and carry out the feeding, and the bucket is carried the heavy height of machine greatly, need repair and establish the second floor or raise whole roofing height, and it is limited to arrange the position. The urea solution preparation equipment has large volume, wide occupied area, high repair cost, long time consumption in the material preparation process, complicated operation procedures and great limitation in use.

Disclosure of Invention

An object of the utility model is to overcome prior art not enough, provide a continuous online feed proportioning system of urea solution and solid feeding subassembly thereof.

The purpose of the utility model is realized through the following technical scheme:

the utility model provides a solid feeding subassembly of continuous feeding, includes hopper and feeding volume detector, the outlet side of hopper is connected with rotary feeder, rotary feeder keeps away from one side fixedly connected with gas-solid mixer of hopper, fixedly connected with air supply and inlet pipe on the gas-solid mixer, air supply and inlet pipe are connected in the relative both sides of gas-solid mixer, feeding volume detector is used for gathering solid feeding volume information.

Through being connected with rotary feeder and gas-solid mixer below the hopper, utilize rotary feeder to convey the material in the gas-solid mixer, under the prerequisite of guaranteeing that the material is sufficient in the hopper, can make the dry urea that falls into in rotary feeder every hour all be equivalent, according to rotary feeder's rotational speed, can calculate out the weight of the dry urea that the solid feeding subassembly was carried every hour again, realize carrying out the mesh of continuous on-line measurement to the transport of dry urea. The feeding amount detector adopted here can be a level meter arranged in the hopper, an upper limit and a lower limit are set for the height of the material in the hopper, and when the height of the material in the hopper reaches the upper limit, the material is stopped being conveyed into the hopper; when the height of the material in the hopper reaches the lower limit, a signal is output to the rotary feeder to stop the rotary feeder so as to ensure that the urea in the rotary feeder is in a fixed capacity (non-empty), and the dry urea metering accuracy is improved. Or the feeding detector can adopt a solid flow meter to directly measure the dry urea amount conveyed in the feeding pipe to obtain the feeding amount of the dry urea. The air source can be an air compressor or an air blower, compressed air or pressurized air is conveyed into the gas-solid mixer by the air compressor or the air blower, a pressure measuring device or a pressure reducing device can be arranged between the gas-solid mixer and the air source, the air and urea powder are fully mixed in the gas-solid mixer, and the urea is conveyed into a mixing container along with the air along a feeding pipe. Therefore, the conveying of solid materials can be realized without adopting a bucket elevator, namely a high and heavy device, and the device cost and the occupied area of the device are effectively saved.

Further, at least one layer of filter screen is fixedly connected in the hopper, one side of the hopper far away from the rotary feeder is fixedly connected with a gate valve, and a purging device is fixedly connected between the gate valve and the filter screen.

Utilize the filter screen to filter dry urea, avoid great granule or packing weaving bag etc. to get into the hopper along with the material in, also be favorable to preventing that people or the great article of volume from missing rotary feeder, influencing rotary feeder's normal function. The filter screen can set up two-layerly or the multilayer in the hopper, if set up the filter screen respectively in the import and the exit of hopper, set up the device that sweeps between the filter screen of import department and the push-pull valve, after the batching is accomplished, can close the push-pull valve, utilize the device that sweeps to sweep in the hopper, reduce the material residue in the hopper.

Furthermore, the outer side of the hopper is fixedly connected with a heat tracing device and a rapping device. The heat tracing medium in the heat tracing device can adopt hot water, steam or electric heat, and the heat tracing device can be used for drying the interior of the hopper, so that urea caking caused by moisture in the hopper is prevented. When the urea hardens on the side wall of the hopper, the rapping device can be opened, and the hardening of the urea on the side wall of the hopper is reduced.

Another object of the utility model is to provide a continuous online feed proportioning system of urea solution, including the batching jar, the last fixed connection of batching jar has as before solid feeding subassembly, it has liquid feeding subassembly still to communicate on the batching jar, liquid feeding subassembly includes water source and raceway, fixedly connected with water flowmeter and governing valve on the raceway. Be provided with stirring piece and heating member in the batching jar, fixedly connected with conveyer pipe on the batching jar, the conveyer pipe is kept away from the one end fixedly connected with holding vessel of batching jar. The solid feeding quantity detector transmits solid feeding quantity information to the controller, the water flowmeter is used for acquiring water inflow information and transmitting the water inflow information to the controller, and the controller controls the regulating valve to change water flow according to the solid feeding quantity information and the water inflow information.

During preparation, the proportion of solid feeding quantity and water inflow quantity is set on the controller according to the concentration of the required urea solution, and the regulating valve is controlled and adjusted according to the solid feeding quantity information and the water inflow quantity information transmitted by the feeding quantity detector and the water flow meter, so that the water inflow quantity is changed, and the proportion of the solid feeding quantity and the water inflow quantity accords with the set proportion. Solid dry urea and liquid water are synchronously fed according to the proportion by metering solid feeding and liquid feeding respectively, feeding and stirring are carried out simultaneously, continuous online batching of the urea solution is realized, several processes of water discharging, feeding, heating and stirring and conveying in the traditional batching process are carried out simultaneously, the process which originally needs 4-6 hours is reduced to 1-2 hours, and the purposes of continuous online batching and conveying of the urea solution with certain concentration are achieved. The holding vessel with batching jar intercommunication can be one, two or many, and when the position of batching jar was higher than the holding vessel, the urea solution in the batching jar can flow into the holding vessel by oneself, when the same or the position of holding vessel of the height of batching jar and holding vessel is higher, set up the delivery pump on the conveyer pipe, the completion is to the transport of urea solution. Meanwhile, under the condition of continuous ingredient conveying, the ingredient tank for heating, stirring and blending does not need to be designed too large, and the ingredient tank with a smaller solvent can be adopted, so that the ingredient tank can be used immediately after being prepared, and the equipment cost is saved, and the occupied area of the equipment is reduced.

Further, the feeding quantity detector is a material level meter which is fixedly connected in the hopper, and the rotary feeder is electrically connected with the controller. The material level meter is used for collecting material height information in the hopper and transmitting the material height information to the controller, and the controller controls the rotary feeder to be opened and closed according to the material height information.

Utilize the level gauge to monitor the material volume in the hopper, when the material height reaches predetermined lower limit, when the material is not enough in the hopper promptly, to the controller signals, the controller receives the instruction that sends the pause operation to rotary feeder after the signal, sends the instruction of closing to the governing valve simultaneously, and the transport of pause urea and water, treat that the material in the hopper adds to when being higher than predetermined lower limit, sends corresponding signal to the controller once more, opens rotary feeder and governing valve by the controller.

Further, the feeding amount detector is a solid flow meter which is fixedly connected to the feeding pipe, and a reserved interface is arranged on the feeding pipe between the solid flow meter and the gas-solid mixer. The solid flow meter is used for detecting the solid feeding amount, so that dry urea and water are fed in proportion, when the two groups of feeding proportions do not accord with the preset proportion, the controller sends an instruction to the regulating valve to control the regulating valve to change the water flow, and the purpose of meeting the preset proportion is achieved. When the tank truck with the pressure tank with the pneumatic conveying device is used as a transport vehicle for transporting dry urea, the unloading pipe of the transport vehicle can be directly connected with the reserved interface, the transport tank truck can directly carry out loading, unpackaged pure urea particles loaded and transported in the transport tank truck enter the batching tank along the feeding pipe to be prepared into urea solution, and the operation is convenient and labor-saving.

Furthermore, one end of the water delivery pipe, which is far away from the water source, is fixedly connected with the feeding pipe. Like this when the feeding, during water flowed into the inlet pipe from the raceway, premixed with dry urea in the inlet pipe, be favorable to shortening dry urea dissolving time, improved the batching efficiency, reduced the dry urea and taken place along with the condition of air discharge batching jar.

Furthermore, a flow guide device is fixedly connected with the position of the batching tank communicated with the feeding pipe. When urea granule gets into the batching jar along with the air current in, impact earlier on guiding device, under the action of gravity, urea granule falls into the batching jar, and gaseous top from the batching jar is then discharged, and guiding device is favorable to promoting the gas-solid separation.

Further, the top fixedly connected with breather pipe of batching jar, breather pipe and batching jar junction are provided with filter equipment, the one end fixedly connected with basin of batching jar is kept away from to the breather pipe, the tip submergence of breather pipe is in aqueous.

Gas with the urea granule separation is from breather pipe discharge batching jar, and the filter equipment in the breather pipe can avoid in the gas urea granule that mixes to discharge the batching jar thereupon, and the combustion gas lets in the basin, is favorable to avoiding in the air is directly discharged to the steam that contains ammonia, causes the pollution to the environment.

Further, lateral wall fixedly connected with temperature measuring device, liquid level measurement device and the density measurement device of batching jar make things convenient for the staff to monitor the condition in the batching jar at any time.

The utility model has the advantages that:

1) the utility model discloses can carry out the accuracy to the solid material that solid feeding subassembly was carried and measure, conveniently realize the synchronous feeding in proportion with water, can save the circulation pipeline that sets up on the traditional batching jar to changed and to have set up the only measuring mode that the densimeter measured solution concentration on can only passing through the circulating pipe. Meanwhile, the gas-solid mixer is adopted to fully mix the solid materials with air and convey the solid materials along the pipeline, so that the equipment cost for conveying the materials is reduced, and the occupied area of the equipment is reduced.

2) The utility model discloses a continuous online feed proportioning system of urea solution is through controlling the volume of advancing to dry urea and water, realize dry urea and water according to the synchronous feeding of predetermineeing the proportion, like this at the beginning feeding, and start after stirring piece and the heating member in the batching jar, about thirty minutes can form urea solution in the batching jar, urea solution in the jar will be joined in marriage is along conveyer pipe transmission to the stock solution in, can use, the consuming time of configuration urea solution has been shortened greatly, the preparation flow has been simplified, also need not once only to prepare 20-24 required urea solution, maintain the solvent state of heating state in order to keep urea solution, be favorable to energy saving and consumption reduction.

3) In the batching process, batching jar only need be as interim batching transfer apparatus, and its volume design need not be restricted to the urea solution volume that once only need prepare, compare in the tradition according to the volume size of 24 hours dwell time design, the utility model discloses only according to the volume size of 1-2 hours dwell time design, can reduce to original 1/12 times, reduced the size of a plurality of equipment's in the batching process size of a dimension, be favorable to improving the economic nature of a whole set of system, improve batching efficiency.

Drawings

Fig. 1 is a schematic structural diagram of a first embodiment of the present invention.

Fig. 2 is a schematic view of an overall structure of a second embodiment of the present invention.

Fig. 3 is a schematic view of an external structure of a dispensing tank according to the second embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a third embodiment of the present invention.

In the figure, 1, a hopper; 2. a rotary feeder; 3. a gas-solid mixer; 4. a gas source; 5. a feed pipe; 6. a filter screen; 7. a gate valve; 8. a purging device; 9. a heat tracing device; 10. a rapping device; 11. a dosing tank; 12. a water source; 13. a water delivery pipe; 14. a water flow meter; 15. adjusting a valve; 16. a stirring member; 17. a heating member; 18. a delivery pipe; 19. a storage tank; 20. a controller; 21. a level gauge; 22. a solids flow meter; 23. a flow guide device; 24. a breather pipe; 25. a filtration device; 26. a water tank; 27. a temperature measuring device; 28. a liquid level measuring device; 29. a density measuring device.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

Example one

As shown in fig. 1, the present embodiment provides a continuous feeding solid feeding assembly, which comprises a hopper 1 and a feeding amount detector, wherein the feeding amount detector adopted in the present embodiment is a level gauge 21, the level gauge 21 is provided with two probes in the hopper 1, one probe is located at a higher position of the hopper 1 for detecting an upper feeding limit of a material, and the other probe is located at a lower position of the hopper 1 for detecting a lower feeding limit of the material. When the materials in the hopper 1 reach the upper feeding limit, stopping feeding, and avoiding the materials from overflowing from the hopper 1; when the material in the hopper 1 reaches the lower feeding limit, the operation of the rotary feeder 2 is stopped to ensure that the urea in the rotary feeder 2 is of a fixed capacity (not empty). Fixedly connected with two-layer filtering net 6 in hopper 1, the one deck is located hopper 1 and is close to the position at top, and the opposite side is located the position of the 1 bottom ejection of compact of hopper, through the filtration of two-layer filtering net 6, is favorable to preventing that the material of great granule, packing weaving bag or caking from getting into rotary feeder 2. At the top fixedly connected with push-pull valve 7 of hopper 1, fixedly connected with sweeps device 8 between push-pull valve 7 and the filter screen 6, after stopping the feeding, can close push-pull valve 7, prevents to have debris to fall into hopper 1 in, closes push-pull valve 7 back, adopts sweep device 8 to sweep the clearance of sweeping to filter screen 6, and the sweep device 8 of this embodiment is the air-blower or has had compressed air, utilizes the air-blower to the interior blast air of hopper 1, reduces the material and remains on filter screen 6.

As shown in fig. 1, a heat tracing device 9 and a rapping device 10 are fixedly connected outside the hopper 1, the heat tracing device 9 of the embodiment adopts an electric heat tracing pipe, the heat tracing pipe surrounds the periphery of the hopper 1, and the inside of the hopper 1 can be dried through heating. Be connected with rotary feeder 2 in the below of hopper 1, rotary feeder 2's below fixedly connected with gas-solid mixer 3, the material in the hopper 1 passes through filter screen 6 under the action of gravity, falls into rotary feeder 2 in, is carried to gas-solid mixer 3 by rotary feeder 2 ration. The two opposite sides of the gas-solid mixer 3 are fixedly connected with a gas source 4 and a feed pipe 5 respectively, the gas source 4 of the embodiment adopts compressed air provided by an existing air compressor, the compressed air is conveyed into the gas-solid mixer 3 by the air compressor, and the compressed air and dry urea are conveyed into a container for batching along the feed pipe 5 after being mixed in the gas-solid mixer 3.

The solid feeding subassembly of this embodiment is when using, open push-pull valve 7 earlier, add the material in hopper 1, the material falls into hopper 1 after through the filter screen 6 on upper strata, behind the material height in hopper 1 is higher than the feeding lower limit, open rotary feeder 2, gas-solid mixer 3 and air compressor machine interface valve, make the material fall into rotary feeder 2 through the filter screen 6 on lower floor under the action of gravity, again by rotary feeder 2 quantitative transmission to gas-solid mixer 3 in, after mixing with the compressed air who comes from the air compressor machine, carry along inlet pipe 5 along the air current. When the hopper 1 is wet or urea is blocked, the heat tracing device 9 or the rapping device 10 can be opened to dry the hopper 1 and reduce the urea blocking. When the height of the materials in the hopper 1 is higher than the upper limit of feeding, the feeding can be suspended, and the materials are prevented from overflowing from the upper end of the hopper 1.

Example two

As shown in FIG. 2, this embodiment provides a continuous online batching system of urea solution, including batching jar 11, the solid feeding subassembly of fixedly connected with embodiment one on batching jar 11, the one end and the gas-solid mixer 3 fixed connection of inlet pipe 5 promptly, the other end and the top fixed connection of batching jar 11 make the material follow the air current and get into in batching jar 11 along inlet pipe 5. The position fixedly connected with guiding device 23 with inlet pipe 5 intercommunication in batching jar 11, the guiding device 23 that this embodiment adopted is the guide plate, is the slope form with the guide plate and is fixed in the intercommunication department of inlet pipe 5. Like this when the feeding, the air current impact on the guide plate of smuggleing urea granule secretly, and in urea granule fell along the guide plate and get into batching jar 11, the air current then upwards removed under the blockking of guide plate, was favorable to promoting the gas-solid separation. Still the intercommunication has liquid feeding component on batching jar 11, liquid feeding component includes water source 12 and raceway 13, water source 12 can be demineralized water to providing in batching jar 11, deionized water or warm and hot hydrophobic, fixedly connected with water flowmeter 14 and governing valve 15 on raceway 13, raceway 13 keeps away from the terminal also fixed connection in the top of batching jar 11 of water source 12, utilize water flowmeter 14 to monitor the inflow, utilize governing valve 15 control inflow, make inflow and urea granule synchronous feeding in proportion.

As shown in figure 2, a stirring part 16 and a heating part 17 are arranged in the mixing tank 11, the stirring part 16 is a stirring shaft blade which is rotatably connected with the mixing tank 11 and is driven by a motor positioned at the outer side of the top of the mixing tank 11 to rotate, and the heating part 17 is an electric heating pipe or a steam heating pipe to stir and heat urea particles and water, so that the dissolution of the urea particles in the water is accelerated, and a urea solution is formed. Fixedly connected with conveyer pipe 18 on batching jar 11's bottom, the one end fixedly connected with holding vessel 19 of batching jar 11 is kept away from to conveyer pipe 18, utilizes the urea solution that conveyer pipe 18 will be prepared to carry to holding vessel 19 in, and the quantity of holding vessel 19 can be one, two or a plurality ofly, can set up the electrothermal tube or the steam heating coil of heating in holding vessel 19, maintains the dissolved state of urea solution, avoids it to appear the crystallization. Storage tank 19 can be located the below of batching jar 11, makes the urea solution in the batching jar 11 flow by oneself like in storage tank 19, and storage tank 19's position also can be abreast or be higher than batching jar 11 with batching jar 11, needs fixedly connected with delivery pump like this on conveyer pipe 18, by in the delivery pump with urea solution pump income storage tank 19.

As shown in fig. 2, the system further comprises a controller 20, and the feeding amount detector, the water flow meter 14 and the regulating valve 15 are respectively electrically connected with the controller 20, the feeding amount detector of the present embodiment is the level gauge 21 adopted in the first embodiment, and the rotary feeder 2 of the present embodiment is also electrically connected with the controller 20. When the height of the material in the hopper 1 reaches the lower feeding limit, the level indicator 21 transmits a signal to the controller 20, and the controller 20 sends a command of suspending operation to the rotary feeder 2 and a command of closing to the regulating valve 15; after the material in the hopper 1 is higher than the lower feeding limit, the level gauge 21 transmits a signal to the controller 20 again, and the controller 20 reopens the rotary feeder 2 and the control valve to ensure the quantitative input of urea particles and the synchronous input of water.

As shown in fig. 2 and 3, a vent pipe 24 is fixedly connected to the top end of the dosing tank 11, a filtering device 25 is arranged at the joint of the vent pipe 24 and the dosing tank 11 for preventing urea particles mixed in the gas from being discharged out of the dosing tank 11 along the vent pipe 24, a water tank 26 is fixedly connected to one end of the vent pipe 24 far away from the dosing tank 11, and the end of the vent pipe 24 is immersed in water to prevent the ammonia-containing hot gas from being directly discharged into the air to pollute the environment. Still fixedly connected with temperature measuring device 27, level measurement device 28 and density measurement device 29 on the lateral wall of batching jar 11 make things convenient for the staff to monitor the condition in the batching jar 11 at any time.

When the urea feeding device is used, the feeding amount of urea particles in unit time is calculated according to the concentration of the required urea solution and the rotating speed of the rotary feeder 2, and the regulating valve 15 is controlled according to the corresponding proportion, so that the feeding amount of the urea particles and the water inflow are kept in the same proportion. Urea particles are added into the hopper 1, after the material quantity in the hopper 1 is fed at a low limit under high pressure, the rotary feeder 2, the gas-solid mixer, the gas source 4, the water source 12, the regulating valve 15 and the water flowmeter 14 are simultaneously started, and the urea particles and the water are synchronously fed. Urea and water are stirred and heated in the batching tank 11 to be dissolved into urea solution, the concentration of the urea solution is detected by using a density detection device, and the urea solution is conveyed into a storage tank 19 along a conveying pipe 18 after the target concentration is reached. The temperature measuring device 27 and the liquid level measuring device 28 are used for detecting the conditions in the batching tank 11, and the operation of the equipment is adjusted or stopped in time once the abnormity occurs. When the material height was crossed lowly in the hopper 1, by charge level indicator 21, controller 20 and rotary feeder 2, governing valve 15 chain, the input of pause material, treat that the material in the hopper 1 exceeds the feeding lower limit, resume normal feeding again, ensure the same proportion input of material and water, realize joining in marriage promptly of urea solution and use.

EXAMPLE III

The difference between the present embodiment and the second embodiment is mainly as follows: as shown in fig. 4, the feeding amount detector of the present embodiment employs a solid flow meter 22, the solid flow meter 22 is fixedly connected to the feeding pipe 5, and the feeding amount of urea particles is monitored by the solid flow meter 22. The solid flow meter 22, the water flow meter 14 and the regulating valve 15 are electrically connected with the controller 20 respectively, when the feeding amount transmitted to the controller 20 by the solid flow meter 22 and the water flow meter 14 does not accord with the preset proportion, the controller 20 sends an instruction to the regulating valve 15 to control the regulating valve 15 to increase or decrease the water flow so that the urea particles and the water are synchronously fed according to the preset proportion. A reserved interface is arranged on the feeding pipe 5 between the solid flow meter 22 and the gas-solid mixer 3 and can be used for connecting a tank wagon with a pneumatic conveying device for conveying urea, and dry urea in the transport vehicle is directly conveyed into the batching tank 11 through the feeding pipe 5. The water pipe 13 right-hand member and the water source 12 fixed connection of this embodiment, the vertical section fixed connection of left end and inlet pipe 5, the water source 12 that provides in this embodiment is low pressure saturated steam, and urea granule in the inlet pipe 5 and the low pressure saturated steam in the water pipe 13 are premixed at the vertical section of inlet pipe 5, and urea absorbs heat after meeting steam rapidly and dissolves the formation solution, is favorable to improving batching efficiency.

The foregoing is illustrative of the preferred embodiments of the present invention, and it is to be understood that the invention is not limited to the precise forms disclosed herein, and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the invention as defined by the appended claims. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.

Claims (10)

1. A continuous feed solid feed assembly characterized by: including hopper (1) and feeding volume detector, the outlet side of hopper (1) is connected with rotary feeder (2), one side fixedly connected with gas-solid mixer (3) of hopper (1) are kept away from in rotary feeder (2), fixedly connected with air supply (4) and inlet pipe (5) are gone up in gas-solid mixer (3), air supply (4) and inlet pipe (5) are connected in the both sides that gas-solid mixer (3) are relative, feeding volume detector is used for gathering solid feeding volume information.

2. A continuous feed solids feed assembly according to claim 1, further comprising: at least one layer of filter screen (6) is fixedly connected with in the hopper (1), one side fixedly connected with push-pull valve (7) of rotary feeder (2) is kept away from in hopper (1), fixedly connected with sweeps device (8) between push-pull valve (7) and filter screen (6).

3. A continuous feed solids feed assembly according to claim 1, further comprising: the outer side of the hopper (1) is fixedly connected with a heat tracing device (9) and a rapping device (10).

4. The utility model provides a continuous online feed proportioning system of urea solution which characterized in that: the solid feeding device comprises a dosing tank (11), wherein a solid feeding component as claimed in any one of claims 1 to 3 is fixedly connected to the dosing tank (11), a liquid feeding component is further communicated to the dosing tank (11), the liquid feeding component comprises a water source (12) and a water conveying pipe (13), and a water flow meter (14) and a regulating valve (15) are fixedly connected to the water conveying pipe (13); a stirring part (16) and a heating part (17) are arranged in the mixing tank (11), a conveying pipe (18) is fixedly connected to the mixing tank (11), and a storage tank (19) is fixedly connected to one end, far away from the mixing tank (11), of the conveying pipe (18); the water flow meter is characterized by further comprising a controller (20), the feeding amount detector, the water flow meter (14) and the regulating valve (15) are electrically connected with the controller (20) respectively, the feeding amount detector transmits solid feeding amount information to the controller (20), the water flow meter (14) is used for collecting water inflow information and transmitting the water inflow information to the controller (20), and the controller (20) controls the regulating valve (15) to change water flow according to the solid feeding amount information and the water inflow information.

5. The continuous in-line urea solution dosing system according to claim 4, characterized in that: the feeding amount detector is a material level meter (21), the material level meter (21) is fixedly connected in the hopper (1), and the rotary feeder (2) is electrically connected with the controller (20); the material level meter (21) is used for collecting material height information in the hopper (1) and transmitting the material height information to the controller (20), and the controller (20) controls the rotary feeder (2) to be opened or closed according to the material height information.

6. The continuous in-line urea solution dosing system according to claim 4, characterized in that: the feeding amount detector is a solid flow meter (22), the solid flow meter (22) is fixedly connected to the feeding pipe (5), and a reserved interface is arranged on the feeding pipe (5) between the solid flow meter (22) and the gas-solid mixer (3).

7. The continuous in-line urea solution dosing system according to claim 4, characterized in that: and one end of the water conveying pipe (13) far away from the water source (12) is fixedly connected with the feeding pipe (5).

8. The continuous in-line urea solution dosing system of claim 4, wherein: the position fixedly connected with guiding device (23) with inlet pipe (5) intercommunication in batching jar (11).

9. The continuous in-line urea solution dosing system according to claim 4, characterized in that: the top fixedly connected with breather pipe (24) of batching jar (11), breather pipe (24) are provided with filter equipment (25) with batching jar (11) junction, one end fixedly connected with basin (26) of batching jar (11) are kept away from in breather pipe (24), the tip submergence of breather pipe (24) is in aqueous.

10. The continuous in-line urea solution dosing system according to claim 4, characterized in that: the lateral wall fixedly connected with temperature measuring device (27), liquid level measuring device (28) and density measuring device (29) of batching jar (11).

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