CN115465887B - Charging system for chlorination furnace - Google Patents

Abstract

The invention discloses a feeding system for a chlorination furnace. The system includes: a raw material bin; two weighing bins and two first cut-off valves; the two weighing bins are respectively connected to the raw material bin through the two first cut-off valves; a delivery pump, It is configured to drive the materials in the raw material bin into the weighing bin; two cache bins, two second cut-off valves, two first pneumatic sealing valves, and the two cache bins pass through two One of the first pneumatic sealing valves and two of the second cut-off valves are connected to the two weighing silos, and the two buffer silos are respectively located below the two weighing silos; U-shaped valve , two second pneumatic sealing valves, the two cache silos are respectively connected to the U-shaped valve through the two second pneumatic sealing valves, and the U-shaped valve is used to connect with the chlorination furnace. The invention can realize accurate, stable and continuous feeding, and can prevent gas in the chlorination furnace from returning to the feeding system.

Description

Feeding system for chlorination furnace

Technical field

The invention relates to the technical field of chemical industry, and in particular to a feeding system for a chlorination furnace.

Background technique

Vanadium-titanium magnetite is smelted in a blast furnace to obtain titanium-containing blast furnace slag. The blast furnace slag is subjected to high-temperature carbonization pretreatment to obtain carbonized slag. The carbonized slag is chlorinated to obtain TiCl ₄ used to prepare titanium dioxide. The carbonized slag is boiling chlorinated in the chlorination furnace. Since the effective components in the carbonized slag are low and the amount of raw materials added is large, in order to improve the chlorination efficiency, it is necessary to continuously, stably and accurately feed the carbonized slag so that the amount of carbonized slag and the amount of chlorine are effective. match.

In the existing technology, there is a chlorination furnace feeding system in the form of "raw material bin + bin pump + high level bin + belt scale metering + intermediate cache bin + star feeder + U-shaped valve". This feeding system has the following problems:

First, the amount of carbonized slag is only dynamically measured by the belt scale. The deviation of the feeding amount is usually more than ±10%, and the maximum reaches ±50%. Moreover, the two belt scales operate alternately, with poor stability, high failure rate, and frequent switching. ; The amount of carbonized slag added fluctuates greatly, and accurate, stable, and continuous feeding cannot be achieved, resulting in a mismatch between the amount of carbonized slag added and the circulating chlorine gas, which has a great impact on the continuous and stable operation of the system and the chlorination efficiency of the carbonized slag.

Secondly, the feeding system has poor sealing performance and only relies on the U-shaped valve and the carbonized slag in the cache silo to form a material seal. When the belt scale does not unload smoothly and there is less carbonized slag in the cache silo and U-shaped valve, it is easy to cause the furnace to malfunction. Gases such as Cl ₂ , TiCl ₄ and HCl will flow back inside, causing the U-shaped valve and intermediate silo to be fed carbonized slag unsmoothly, and gas leakage in the furnace will cause environmental pollution and equipment corrosion.

Thirdly, the equipment failure rate of the feeding system is high, the maintenance labor intensity is high, and the ability to ensure supply is poor. Belt scales not only have low measurement accuracy, large fluctuations, difficult calibration, and are prone to problems such as deviation, material stacking, and material leakage, but the star feeder is also prone to jamming and is affected by TiCl ₄ and condensation blockage. The two sets of devices in the feeding system cannot form one for use and one for standby, resulting in poor supply capacity of the feeding system and heavy maintenance tasks.

Contents of the invention

The main purpose of the present invention is to provide a charging system for a chlorination furnace to solve at least one aspect of the above technical problems.

According to one aspect of the present invention, a feeding system for a chlorination furnace is proposed, including: a raw material bin; two weighing bins, and two first cut-off valves. The two weighing bins pass through two The first cut-off valve is connected to the raw material bin; a delivery pump is configured to drive the materials in the raw material bin into the weighing bin; two buffer bins, two second cut-off valves, two third A pneumatic sealing valve, and the two cache silos are connected to the two weighing silos through the two first pneumatic sealing valves and the two second cut-off valves respectively. The two cache silos are The bins are respectively located under the two weighing bins; a U-shaped valve and two second pneumatic sealing valves. The two buffer bins are respectively connected to the U-shaped valve through two second pneumatic sealing valves. , the U-shaped valve is used to connect with the chlorination furnace.

According to an embodiment of the present invention, the system further includes a plurality of soft connectors, and the two weighing bins are respectively installed in the system through a plurality of the soft connectors.

According to an embodiment of the present invention, the soft connection includes elastic components and/or flexible components.

According to an embodiment of the present invention, the buffer silo is equipped with a material level meter.

According to one embodiment of the present invention, the cache silo is equipped with an inert gas purging device and a silo rapping device.

According to an embodiment of the present invention, the loose air volume of the U-shaped valve is controlled at 10-15 m ³ /h, and the delivered air volume of the U-shaped valve is controlled at 20-30 m ³ /h.

According to an embodiment of the present invention, the system further includes: a control device configured to: based on the weight value detected by the weighing bin reach the first preset value, and all the weight values corresponding to the weighing bin The second cut-off valve is in a closed state, and the first cut-off valve corresponding to the weighing silo is controlled to open to add materials to the weighing silo.

According to an embodiment of the present invention, the control device is configured to: based on the weight value detected by the weighing bin reaching a second preset value, control the first cut-off valve corresponding to the weighing bin. closure.

According to an embodiment of the present invention, the control device is configured to: based on the change value of the weight value detected by the weighing bin reaching a desired value, close the second cut-off valve corresponding to the weighing bin and The first pneumatic sealing valve.

According to an embodiment of the present invention, the control device is further configured to: based on the opening time of any second pneumatic sealing valve reaching a preset time, control the closing of any second pneumatic sealing valve, and control the other second pneumatic sealing valve to close. The pneumatic sealing valve opens, and the second cut-off valve and the first pneumatic sealing valve corresponding to any second pneumatic sealing valve are controlled to open.

According to the feeding system for the chlorination furnace according to the embodiment of the present invention, the weighing silo is used to weigh the materials. The weighing silo adopts a static weighing method, which has good accuracy and can avoid problems caused by dynamic weighing of the belt scale. Problems of low accuracy and poor stability. There are two sets of weighing silos, cache silos and related cut-off valves and pneumatic sealing valves, which can realize alternate and continuous feeding, ensure the continuity and stability of feeding, and improve the supply capacity. Pneumatic sealing valves are installed at the inlet and outlet ends of the buffer silo to prevent gas in the chlorination furnace from flowing back to the weighing silo and causing pollution and corrosion to related equipment.

Description of the drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without exerting creative efforts.

Figure 1 shows a schematic diagram of a charging system for a chlorination furnace according to an embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to specific embodiments and the accompanying drawings.

It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are to distinguish two entities or parameters with the same name but not the same, so it can be seen that "first" and "second" It is only for the convenience of description and should not be understood as a limitation on the embodiments of the present invention, and subsequent embodiments will not describe this one by one.

Regarding the carbonized slag boiling chlorination feeding system, the dynamic metering accuracy is low, the fluctuation is large, the stability is poor, the failure rate is high, the switching is frequent, the carbonized slag addition amount does not match the circulating chlorine gas, the feeding system has poor sealing, and it is easy to cause Gases such as Cl ₂ , TiCl ₄ and HCl flow back in the furnace, resulting in poor feeding of carbonized slag, causing environmental pollution, equipment corrosion and other problems. This application proposes a feeding system 100 for a chlorination furnace to be described as follows, in order to improve Solutions are provided for the above problems.

Figure 1 shows a schematic diagram of a charging system 100 for a chlorination furnace according to an embodiment of the present invention. As shown in Figure 1, the system 100 includes: a raw material bin 10; two weighing bins 20, 22, and two first cut-off valves 30, 32. The two weighing bins 20, 22 pass through two first cut-off valves respectively. Valves 30, 32 are connected to the raw material bin 10; the delivery pump 40 is configured to drive the materials in the raw material bin 10 into the weighing bin 20, 22; two buffer bins 50, 52, and two second cut-off valves 60, 62 , two first pneumatic sealing valves 70,72, two buffer silos 50,52 respectively pass through the two first pneumatic sealing valves 70,72, the two second cut-off valves 60,62 and the two weighing silos. 20,22 connection, two cache silos 50,52 are located below the two weighing silos 20,22 respectively; U-shaped valve 80, two second pneumatic sealing valves 90,92, two cache silos 50,52 They are respectively connected to the U-shaped valve 80 through two second pneumatic sealing valves 90 and 92, and the U-shaped valve 80 is used to connect to the chlorination furnace 1.

In the embodiment of the present invention, by adopting the composite feeding mode of "static weighing + closed silo alternating batches to achieve continuous + U-shaped valve high-density phase and low gas volume transportation", continuous, stable, sealed and precise feeding of carbonized slag can be achieved to achieve carbonization The slag is accurately measured, smoothly added to the chlorination furnace, and efficiently matched and reacted in the chlorination furnace to improve the utilization efficiency of TiC and chlorine in the carbonized slag.

System 100 may include two sets of closed weighing devices, which are outlined by the dashed lines in Figure 1 . The two sets of closed weighing devices are identical to each other. The first set of closed weighing devices includes: a first cut-off valve 30, a weighing bin 20, a second cut-off valve 60, a first pneumatic sealing valve 70, a buffer silo 50 and a second pneumatic sealing valve 90. Similarly, the second set of closed weighing devices includes: the first cut-off valve 32 , the weighing bin 22 , the second cut-off valve 62 , the first pneumatic sealing valve 72 , the buffer bin 52 and the second pneumatic sealing valve 92 . The raw material bin 10 is connected to the two first shut-off valves 30 and 32, and a delivery pump 40 is provided on the connection path between the raw material bin 10 and the first shut-off valves 30 and 32. The two second pneumatic sealing valves 90 and 92 are connected to the U-shaped valve 80, and the U-shaped valve 80 is connected to the chlorination furnace 1. The buffer silos 50 and 52 can be small-volume fixed-volume silos, with a constant amount of the same material added each time.

The design of two sets of sealed weighing devices enables the system 100 to achieve alternate and continuous feeding. During use, the two sets of sealed weighing devices are used, one in use and one in standby, with good supply capability.

The weighing bin 20/22 may be a bin equipped with a weighing sensor. The weighing silo 20/22 adopts static weighing method, which has good measurement accuracy and stability. The corresponding weighing sensor can be selected according to the feeding accuracy requirements to achieve high-precision and accurate weighing. For example, the accuracy can reach kilogram level.

In the embodiment of the present invention, the system 100 further includes a plurality of soft connectors 42, and the two weighing bins 20 and 22 are respectively installed in the system 100 through the plurality of soft connectors 42. The weighing bin 20/22 can be independent from the feeding system 100 through the soft connection 42 to achieve accurate weighing. The soft connector 42 may include elastic components and/or flexible components, such as ropes, elastic strips, etc.

When the system 100 is in use, a certain amount of material is first added to the weighing bin 20/22. Then the weighing silo 20/22 provides the desired amount of material to the buffer silo 50/52. The amount of material added can be controlled by controlling the decrease in the weight value detected by the weighing silo 20/22 to achieve accurate feeding. The cache silo 50/52 is set below the weighing silo 20/22. After opening the second cut-off valve 60/62 and the first pneumatic sealing valve 70/72, the material can fall into the cache silo 50/52 under the action of gravity. .

When charging the weighing bin 20, the first shut-off valve 30 is opened and the first shut-off valve 32 is closed. After the filling of the weighing bin 20 is completed, the first shut-off valve 30 is closed. At this time, the first shut-off valve 32 can be opened to complete the feeding of the weighing bin 22 . At the same time, after the weighing silo 20 completes charging, the second cut-off valve 60 and the first pneumatic sealing valve 70 can be opened to feed the buffer silo 50 . Correspondingly, after the filling of the weighing bin 22 is completed, the second shut-off valve 62 and the first pneumatic sealing valve 72 can be opened to feed the buffer bin 52 .

After the desired amount of materials is added to the cache silo 50, the second pneumatic sealing valve 90 is opened. Under the adjustment of the U-shaped valve 80, the materials in the cache silo 50 can be stably added to the chlorination furnace 1. When the materials in the cache silo 50 are used up, the second pneumatic sealing valve 90 is closed in time, and the second pneumatic sealing valve 92 is opened to switch to feeding the chlorination furnace 1 from the cache silo 52 . During the process of charging the cache silo 52 to the chlorination furnace 1, the second cut-off valve 60 and the first pneumatic sealing valve 70 are opened, and a new round of feeding is performed to the cache silo 50, so that the materials in the cache silo 52 can be used. After that, the buffer silo 50 is used to feed the chlorination furnace 1 again. In this way, the chlorination furnace 1 is alternately fed with materials through the two buffer silos 50 and 52 to ensure the continuity of feeding. The amount of material in the cache silo 50/52 can be accurately provided by the weighing silo 20/22, thereby achieving accurate, stable and continuous feeding of materials to the chlorination furnace 1.

The second pneumatic sealing valve 90/92 is disposed between the cache silo 50/52 and the U-shaped valve 80, that is, it is disposed on the discharge pipeline of the cache silo 50/52, which can realize the connection between the cache silo 50/52 and the U-shaped valve 80. The effective partition between the valves 80 can also realize the effective partition between the cache silo 50/52 and the chlorination furnace 1. The first pneumatic sealing valve 70/72 is set between the cache silo 50/52 and the weighing silo 20/22, that is, it is set on the feed pipeline of the cache silo 50/52, so that the cache silo 50/52 can be realized Effective partition with weighing silo 20/22. This provides multiple guarantees that the chlorination furnace 1 and the weighing silo 50/52 can be effectively isolated at any time to prevent toxic and harmful gases in the chlorination furnace 1 from returning to the weighing silo 50/52. When the second pneumatic sealing valve 90/92 is opened to feed the chlorination furnace 1, the first pneumatic sealing valve 70/72 can play the role of isolating the buffer silo 50/52 and the weighing silo 20/22 to prevent chlorine The gas in the furnace enters the weighing silo 20/22.

In some embodiments, cache bins 50, 52 are configured with level gauges. The material level meter can accurately feedback the material amount, feeding speed and feeding stability. The U-shaped valve 80 can be adjusted according to the feedback result of the material level gauge, so that the material can enter the chlorination furnace 1 stably.

In some embodiments, the cache bins 50, 52 are configured with an inert gas purge device and a bin rapping device. In the later stage of feeding, the amount of material added may be affected. The inert gas purging device and bin vibration device can keep the material added amount stable. The purge gas is selected based on the principle that it does not react with the raw materials and products, preferably nitrogen.

The U-shaped valve 80 can realize the balanced and stable feeding of materials into the chlorination furnace 1, and can provide a certain sealing effect to prevent the gas in the chlorination furnace 1 from flowing back and leaking into the feeding system. At the same time, the U-shaped valve 80 can also add materials into the chlorination furnace 1 with a very small gas volume (compared to pneumatic conveying equipment such as FK pumps, which can be reduced by 1 to 2 orders of magnitude), greatly reducing the impact of gas on boiling chlorination and TiCl ₄ collection. and exhaust gas treatment system to create pressure, improving the operational stability of the chlorination furnace, TiCl ₄ collection and exhaust gas treatment system.

The inventor of this application realized that since the boiling chlorination furnace has high gas volume requirements, when the gas volume increases, not only a large amount of fine-grained carbonized slag will be taken out of the chlorination furnace with the gas, which will bring a greater burden to the cyclone and dust removal, but also And affect the chlorination effect of carbonized slag. At the same time, a larger amount of inert gas dilutes the TiCl ₄ content, adds a greater load to TiCl ₄ elution capture and tail gas treatment, and reduces the economy of the entire process. Therefore, the pneumatic conveying equipment FK pump and pulse warehouse pump are not suitable for adding carbonized slag directly to the chlorination furnace. The present invention avoids the problem of large gas delivery volume by using a U-shaped valve.

In the embodiment of the present invention, the loose air volume of the U-shaped valve 80 is controlled at 10 to 15 m ³ /h, and the delivered air volume of the U-shaped valve 80 is controlled at 20 to 30 m ³ /h. On the one hand, it ensures the flow of materials, and on the other hand, it avoids excessive gas volume causing pressure on the boiling chlorination, TiCl ₄ collection and tail gas treatment systems.

System 100 can achieve a certain degree of automated control. In some embodiments, the system 100 further includes: a control device configured to: reach a first preset value based on the weight value detected by the weighing bin 20/22, and a second value corresponding to the weighing bin 20/22. The cut-off valve 60/62 is in a closed state, and the first cut-off valve 30/32 corresponding to the weighing silo 20/22 is controlled to open to add materials to the weighing silo 20/22.

When there is less material in the weighing bin 20/22, the weighing bin 20/22 can be automatically filled with materials, and when adding materials to the weighing bin 20/22, ensure that the weighing bin 20/22 is not Add materials to the corresponding buffer bin 50/52 to prevent inaccurate feeding. The first preset value may be 30 tons.

In some embodiments, the control device is configured to: based on the weight value detected by the weighing bin 20/22 reaching the second preset value, control the first cut-off valve 30/ corresponding to the weighing bin 20/22. 32 off. When a sufficient amount of material is added to the weighing bin 20/22, the feeding can be ended automatically. The second preset value may be 80 tons.

In some embodiments, the control device is configured to close the second cut-off valve 60/62 corresponding to the weighing bin 20/22 based on the change value of the weight value detected by the weighing bin 20/22 reaching a desired value. and first pneumatic sealing valve 70/72. Thereby, the desired amount of material is automatically added to the buffer silo 50/52 according to the change value of the weight value detected by the weighing silo 20/22 to achieve accurate feeding.

In some embodiments, the control device is further configured to: based on the opening time of any second pneumatic sealing valve 90/92 reaching a preset time, control any second pneumatic sealing valve 90/92 to close, and control the other The second pneumatic sealing valve 90/92 is opened, and the second shut-off valve 60/62 and the first pneumatic sealing valve 70/72 corresponding to any second pneumatic sealing valve 90/92 are controlled to be opened. Thus, alternating and continuous feeding can be realized automatically. For each cache silo 50/52, the time for feeding the chlorination furnace 1 can be preset. When the opening time of the second pneumatic sealing valve 90/92 reaches the preset time, the cache silo 50/52 can be determined. 52 Completes charging of chlorination furnace 1. The preset time may be 35 minutes.

According to the above description, the feeding system 100 of the embodiment of the present invention can realize sealed, continuous, stable and accurate feeding during the boiling chlorination process of carbonized slag, and adjust the carbonized slag transportation process by optimizing the carbonized slag metering method and the carbonized slag feeding equipment structure. , to achieve effective separation between the chlorination furnace and the main silo, and accurate measurement of carbonized slag. In a closed system, by controlling the amount of transported gas, the carbonized slag can be continuously, stably and accurately added to the chlorination furnace to effectively match the chlorine gas, thereby effectively increasing the titanium element in the carbonized slag. comprehensive chlorination effect. The feeding system 100 of the present invention also has the advantages of simplicity, reliability, good continuous stability, high efficiency, small floor space, low energy consumption, and large processing capacity.

The following description is based on specific embodiments.

Example 1

This example is an industrial application and was implemented on the TiCl ₄ production line built by Panzhihua Iron and Steel Co., Ltd. for the low-temperature chlorination of carbonized slag. The feeding system mainly includes: 1 large 400-ton raw material warehouse, 1 warehouse-type transfer pump, and two sets of closed weighing devices ( Each set of equipment contains a 120t weighing silo, a 10t buffer silo and supporting cut-off valves and pneumatic sealing valves. The two sets of equipment are numbered A and B respectively, and a fluidized U-shaped valve. Two sets of closed weighing devices are used alternately to achieve continuous and stable carbonization feeding, with a feeding capacity of 12 to 20t/h.

The raw material of carbonized slag is blast furnace slag from the #1 blast furnace of Panzhihua Iron and Steel Group Corporation, which is reduced and ground into 60 to 1000 mesh carbonized slag by high-temperature carbonization electric furnace. Its typical particle size distribution is shown in Table 1.

Table 1 Typical particle size distribution of carbonized slag/%

The specific process of continuous and stable closed feeding of carbonized slag boiling chlorination includes the following steps:

1. After high-temperature carbonization reduction and crushing and grinding, the carbonized slag (finished carbonized slag) of 60 to 1000 mesh will be transported to the low boiling chlorination production site by tanker truck, and then pumped by the truck to the large raw material warehouse for later use.

2. Send the carbonized slag into the A high-level weighing silo through the warehouse pump, open the cut-off valve on the top of the A silo, and start feeding the carbonized slag into the A high-level weighing silo. At the same time, the carbonized slag is weighed. When the A high-level weighing silo After the weight reaches 80 tons, close the cut-off valve on the top of warehouse A, open the cut-off valve on the top of warehouse B, and feed carbonized slag into high-level weighing silo B; high-level weighing silo A is on standby. When the weight of B high-level weighing silo reaches 80 tons, the warehouse pump is stopped and B high-level weighing silo is reserved. When the carbonized slag in high-level weighing silo A and high-level weighing silo B is less than 30 tons, restart the warehouse pump to replenish carbonized slag to the high-level weighing silo. When adding carbonized slag, make sure that the weighing silo does not add carbonized slag to the high-level weighing silo. Add materials to the corresponding cache silo. During operation, the weight of carbonized slag in A and B weighing silos is always kept at 30 to 80t.

3. After the carbonized slag is no longer fed into the A high-position weighing silo, the weight of the carbonized slag is accurately read as 85.647t. Open the A feed cut-off valve and A1 pneumatic sealing valve in sequence to feed the A cache silo. According to the A cache silo level gauge, determine that the A cache silo is full and then close the A feed cut-off valve and A1 pneumatic sealing valve. According to the weight reduction of the weighing silo, the weight of carbonized slag in the cache silo was accurately calculated to be 9.752t. The carbonized slag in the cache silo A was added in 3 to 5 minutes.

4. Open the A2 pneumatic sealing valve and add the carbonized slag into the fluidized U-shaped valve, open the fluidized U-shaped valve to loosen the air and transport the gas, and start feeding the carbonized slag into the chlorination furnace. Determine the stability of carbonized slag feeding based on the reading of the cache silo material level meter, adjust the loosening air and conveying air volume of the fluidized U-shaped valve, keep the feeding time of each batch of the cache silo at 35 minutes, and control the loosening air volume at 10 ~ 15m ³ / h, the conveying air volume is 20~30m ³ /h. According to the adjusted air volume, determine the loosening air and conveying air valve openings of the fluidized U-shaped valve and fix the valve openings.

5. In the later stage of feeding, turn on the vibrator of the A cache silo, and add a small amount of purge gas appropriately to keep the amount of carbonized slag added stable. When the carbonized slag is added to the cache silo A, close the A2 pneumatic sealing valve to ensure that the chlorination furnace and the weighing system A are completely disconnected. The carbonized slag filling of the weighing system A is completed. Enter the next round of weighing and repeat step 3. ,4. While A weighing system is adding carbonized slag, B weighing system B2 pneumatic sealing valve is closed, and the chlorination furnace and B weighing system are completely disconnected.

6. While the A weighing system is adding carbonized slag to the chlorination furnace, the B weighing system begins to add carbonized slag to the B cache silo. The operation is as follows: B high-level weighing silo no longer feeds carbonized slag, and the carbonized slag is accurately read. Weight 83.129t. Open the B feed cut-off valve and the B1 pneumatic sealing valve in turn to feed carbonized slag into the B cache silo. According to the B cache silo level gauge, determine that the B cache silo is full and then close the B feed cut-off valve and the B1 pneumatic sealing valve. According to the weight reduction of the weighing silo, the weight of carbonized slag in the cache silo is accurately calculated to be 9.773t, and the carbonized slag in the cache silo B is added for 3 to 5 minutes.

7. When the carbonized slag in the weighing cache silo A is completely added, promptly open the B2 pneumatic sealing valve to add the carbonized slag in the cache silo B into the fluidized U-shaped valve, and continuously and steadily feed the carbonized slag into the chlorination furnace. Determine the stability of carbonized slag feeding based on the reading of the cache silo material level gauge. Keep the loose air volume of the fluidized U-shaped valve at 10~ ^15m3 /h, and the conveying air volume at 20~ ^30m3 /h. At the end of the feeding period, turn on B cache Vibrator of the silo, and add a small amount of purge gas appropriately to keep the amount of carbonized slag added stable. When the carbonized slag is added to the B cache silo, close the B2 pneumatic sealing valve to ensure that the chlorination furnace and B weighing system are completely disconnected. When the carbonized slag is added to the cache silo B, the carbonized slag is also added to the cache silo A. The A2 pneumatic sealing valve is opened in time to add the carbonized slag to the fluidized U-shaped valve and continue to feed the carbonized slag into the chlorination furnace.

At this time, the carbonized slag boiling chlorination feeding system has completed one round of continuous and stable sealed feeding of carbonized slag.

Those of ordinary skill in the art should understand that the above discussion of any embodiments is only illustrative, and is not intended to imply that the scope of the disclosure of the embodiments of the present invention (including the claims) is limited to these examples; under the thinking of the embodiments of the present invention , the above embodiments or technical features in different embodiments can also be combined, and there are many other changes in different aspects of the embodiments of the present invention as described above, which are not provided in details for the sake of simplicity. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present invention shall be included in the protection scope of the embodiments of the present invention.

Claims (10)

1. A charging system for a chlorination furnace, comprising:

a raw material bin;

the two weighing bins are connected with the raw material bin through the two first cut-off valves respectively; the weighing bin is a bin provided with a weighing sensor;

the conveying pump is configured to drive materials in the raw material bin into the weighing bin;

the device comprises two cache storage bins, two second shut-off valves and two first pneumatic sealing valves, wherein the two cache storage bins are connected with two weighing storage bins through the two first pneumatic sealing valves and the two second shut-off valves in sequence respectively, and the two cache storage bins are positioned below the two weighing storage bins respectively;

the device comprises a U-shaped valve and two second pneumatic sealing valves, wherein the two cache bins are respectively connected with the U-shaped valve through the two second pneumatic sealing valves, and the U-shaped valve is used for being connected with a chlorination furnace.

2. The system of claim 1, further comprising a plurality of flexible connectors, two of the weigh bins being mounted in the system by the plurality of flexible connectors, respectively.

3. The system of claim 2, wherein the flexible connection comprises a resilient member and/or a flexible member.

4. The system of claim 1, wherein the cache silo is configured with a level gauge.

5. The system according to claim 1, wherein the buffer bin is provided with an inert gas purge device and a bin rapping device.

6. The system according to claim 1, wherein the loosening amount of the U-shaped valve is controlled to be 10-15 m ³ And/h, controlling the air conveying amount of the U-shaped valve to be 20-30 m ³ /h。

7. The system of claim 1, further comprising: a control device configured to:

and controlling the first cut-off valve corresponding to the weighing bin to be opened so as to feed the weighing bin based on the fact that the weight value detected by the weighing bin reaches a first preset value and the second cut-off valve corresponding to the weighing bin is in a closed state.

8. The system of claim 7, wherein the control device is configured to:

and controlling the first cut-off valve corresponding to the weighing bin to be closed based on the weight value detected by the weighing bin reaching a second preset value.

9. The system of claim 7, wherein the control device is configured to:

and closing the second cut-off valve and the first pneumatic sealing valve corresponding to the weighing bin based on the change value of the weight value detected by the weighing bin reaching an expected value.

10. The system of claim 7, wherein the control device is further configured to:

and controlling the closing of any one of the second pneumatic sealing valves and the opening of the other second pneumatic sealing valve based on the fact that the opening time of any one of the second pneumatic sealing valves reaches the preset time, and controlling the opening of the second cut-off valve and the first pneumatic sealing valve corresponding to any one of the second pneumatic sealing valves.