Salt discharging device of molten salt chlorination furnace

Abstract

The salt discharging device of the fused salt chlorination furnace comprises a salt discharging flow channel three-way pipe arranged above a salt discharging pit, the upper end pipe of the salt discharging flow channel three-way pipe is connected with a discharging opening, the lower end pipe of the salt discharging flow channel three-way pipe is a buffer pipe, the middle pipe of the salt discharging flow channel three-way pipe is connected with a salt discharging flow channel straight pipe, and the middle pipe of the salt discharging flow channel straight pipe is connected with the salt discharging pit. The tail part of the salt discharging runner straight pipe extends into the salt discharging pit, a feeding hopper is arranged above the salt discharging runner straight pipe, and an automatic gate valve is arranged in the middle of a straight pipe of the feeding hopper. According to the salt discharging device of the molten salt chlorination furnace, the buffer area is increased by changing the salt discharging runner of the molten salt chlorination furnace, so that frequent perforation of the salt discharging runner caused by scouring of high-temperature molten salt to the salt discharging runner is avoided; meanwhile, an automatic feeding device is additionally arranged in the salt discharging process, volatile harmful substances in the fused salt are removed, and therefore the purposes of reducing the equipment maintenance cost, reducing potential safety hazards in the salt discharging process, reducing harmful gas emission, protecting the environment and the like are achieved.

Description

Technical Field

[0001] The utility model belongs to the field of molten salt chlorination furnace discharge salt, in particular to a molten salt chlorination furnace discharge salt device. Background Art

[0002] The main raw materials for molten salt chlorination production are: high titanium slag, reducing agent (petroleum coke), molten salt (sodium chloride), chlorine, and anode chlorine. The production process is as follows: high titanium slag and reducing agent (petroleum coke) are ground and stored in the furnace silo for production. After the chlorination furnace is started and heated, the molten salt medium is added. After the temperature in the furnace reaches a certain condition, the high titanium slag and petroleum coke are continuously added to the surface of the molten salt in the chlorination furnace through the feeding system. The anode chlorine and evaporated chlorine mixture enters the chlorination furnace from the chlorine spray gun and distributor at the bottom of the chlorination furnace at a certain pressure. The chlorine is dispersed into fine bubbles and gradually rises from the bottom of the molten salt to the surface of the melt. High titanium slag and petroleum coke are adsorbed on the bubbles under the action of surface tension and evenly distributed in the melt, so that various materials can get good contact with each other, creating conditions for the chemical reaction. The titanium tetrachloride gas generated by the chlorination reaction is discharged from the gas outlet of the molten salt chlorination furnace and enters the subsequent dust collection and condensation system. Due to the continuous addition of chlorine and furnace charge, molten salt accumulates in the chlorination furnace. As titanium dioxide is consumed, the content of carbon and other insoluble components in the molten salt exceeds 20%, which will cause the viscosity of the molten salt to increase. In order to maintain a constant molten salt level and control the proportion of insoluble media in the molten salt, it is necessary to continuously add furnace charge to replenish the molten salt and periodically discharge waste salt.

[0003] Because the temperature of the discharged waste salt is 730-800℃, the high-temperature molten salt flushes the salt discharge channel, causing frequent perforation of the salt discharge channel, which requires frequent inspection and replacement, resulting in maintenance difficulties, high maintenance costs and labor costs, and the perforation of the salt discharge channel also increases the risk of salt discharge work; at the same time, the waste salt contains a small amount of titanium tetrachloride during the salt discharge process. During the salt discharge process and when the salt hopper is lifted and the waste salt is handled, titanium tetrachloride will react with water in the air to produce a large amount of white smoke and acidic smoke, which is very harmful to human health, equipment and the environment, but these acidic waste gases are difficult to collect and treat.

[0004] Therefore, there is an urgent need to provide a molten salt chlorination furnace salt discharge device that can prevent the salt discharge channel from being perforated and effectively collect acidic waste gas. Utility Model Content

[0005] The purpose of the utility model is to overcome the shortcomings of the above-mentioned prior art and provide a molten salt chlorination furnace salt discharge device to solve the problems of frequent perforation of the salt discharge channel, greater risk in salt discharge work, and a large amount of acidic smoke generated during the salt discharge process that endangers equipment safety, personal health and pollutes the environment.

[0006] The utility model discloses a molten salt chlorination furnace salt discharge pipeline anti-scouring device, comprising a salt discharge channel tee pipe arranged above the salt discharge pit, the upper end pipe of the salt discharge channel tee pipe is connected to a discharge port, the lower end pipe of the salt discharge channel tee pipe is a buffer pipe, the middle pipe of the salt discharge channel tee pipe is connected to a salt discharge channel straight pipe, the tail of the salt discharge channel straight pipe extends into the salt discharge pit, a feeding hopper is installed above the salt discharge channel straight pipe, and an automatic gate valve is arranged in the middle of the straight pipe of the feeding hopper.

[0007] Furthermore, a salt discharge hopper is placed in the salt discharge pit, and a compressed air flushing pipe is also arranged in the salt discharge hopper.

[0008] Furthermore, the compressed air flushing pipe extends into the salt discharge hopper through a movable plate arranged above the salt discharge pit.

[0009] Furthermore, high-temperature molten salt liquid is stored in the buffer tube to form a buffer area.

[0010] Furthermore, a sealing cover is used to seal the lower end of the buffer pipe, and the lower end of the sealing cover is connected to a three-way pipe bracket, and the three-way pipe bracket is placed on the bottom plate above the salt discharge pit.

[0011] Furthermore, a partition is provided in the middle of the salt drainage pit, the upper end of the partition is fixedly connected to the bottom plate, and there is a gap between the lower end of the partition and the bottom of the salt drainage pit.

[0012] Furthermore, the partition divides the area of ​​the salt discharge pit into a salt discharge area and a dust collection area.

[0013] Furthermore, a vacuum pipe is installed above the dust collecting area.

[0014] The utility model has the following beneficial effects:

[0015] 1. The utility model adopts a three-way pipe for the salt discharge flow channel, and uses the lower end pipe of the three-way pipe for the salt discharge flow channel as a buffer pipe. During the salt discharge process, high-temperature molten salt will form a certain amount of liquid accumulation in the buffer area to play a buffering role, thereby preventing the high-temperature molten salt from scouring the salt discharge flow channel and causing frequent perforation of the salt discharge flow channel;

[0016] 2. The utility model is equipped with a feeding hopper during the salt discharge process, and lime is added to react with titanium tetrachloride in the waste salt to remove titanium tetrachloride, thereby avoiding the release of a large amount of acidic smoke and dust when the salt hopper is hoisted out of the salt discharge pit in the later stage, and removing volatile harmful substances in the molten salt, thereby achieving the purpose of reducing equipment maintenance costs, reducing safety hazards in the salt discharge process, reducing harmful gas emissions, protecting the environment, etc.;

[0017] 3. The utility model adds a compressed air purge pipe in the salt discharge hopper during the salt discharge process to completely remove titanium tetrachloride in the waste salt. At the same time, the low-boiling point components in the waste salt are removed by compressed air purge and stirring to avoid the generation of smoke and dust by volatilization in the later stage;

[0018] 4. In the utility model, a partition is added in the middle of the salt discharge pit to divide the salt discharge pit into a salt discharge area and a dust collection area. During the salt discharge process, smoke and dust enter the dust collection area from the bottom of the partition, solid particles are precipitated in this area, low-boiling point components are condensed, and the remaining exhaust gas is extracted by the negative suction pipe, thereby reducing the blockage of the negative suction pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The utility model is a structural schematic diagram of a molten salt chlorination furnace salt discharge device.

[0020] Among them, 1-feeding port; 2-middle pipe; 3-buffer area; 4-salt discharge channel straight pipe; 5-feeding hopper; 6-automatic plug valve; 7-salt discharge hopper; 8-compressed air flushing pipe; 9-salt discharge area; 10-dust collection area; 11-partition; 12-negative suction pipe. DETAILED DESCRIPTION

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0022] According to the embodiment of the utility model, in combination with the attached Figure 1 As shown, the salt discharge device of the molten salt chlorination furnace of the utility model comprises: a salt discharge channel tee, a salt discharge channel straight pipe 4, a feeding hopper 5, an automatic gate valve 6, a salt discharge hopper 7, a compressed air flushing pipe 8, a partition 11 and a negative suction pipe 12. Among them, the upper end pipe of the salt discharge channel tee is connected to the discharge port 1, the lower end pipe of the salt discharge channel tee is a buffer pipe, the middle pipe 2 of the salt discharge channel tee is connected to the salt discharge channel straight pipe 4, the tail of the salt discharge channel straight pipe 4 passes through the bottom plate and extends into the salt discharge pit, a feeding hopper 5 is installed above the salt discharge channel straight pipe 4, and an automatic gate valve 6 is arranged in the middle of the straight pipe of the feeding hopper 5. A salt discharge hopper 7 is placed in the salt discharge pit, and a compressed air flushing pipe 8 is also arranged in the salt discharge hopper 7. The compressed air flushing pipe 8 extends into the salt discharge hopper 7 through a movable plate arranged above the salt discharge pit. A partition 11 is provided in the middle of the salt discharge pit. A negative suction pipe 12 is installed above the dust collecting area 10. The utility model increases a buffer zone by changing the salt discharge channel of the molten salt chlorination furnace to avoid frequent perforation of the salt discharge channel caused by high-temperature molten salt scouring the salt discharge channel; at the same time, a feeding hopper 5 is added during the salt discharge process to remove volatile harmful substances in the molten salt. Thereby, the purpose of reducing equipment maintenance costs, reducing safety hazards during salt discharge, reducing harmful gas emissions, and protecting the environment is achieved.

[0023] According to the embodiment of the utility model, the inner cavity space of the lower end tube of the salt discharge channel tee is used as the buffer area 3 during the salt discharge process. The lower end tube can also be called a buffer tube. During the salt discharge process, high-temperature molten salt will form a certain amount of effusion in the buffer area 3 to play a buffering role. The lower end of the buffer tube is sealed with a sealing cover, and the lower end of the sealing cover is connected to a tee bracket, and the tee bracket is fixedly placed on the bottom plate above the salt discharge pit. It is used to support the stability of the salt discharge channel tee.

[0024] According to an embodiment of the utility model, a partition 11 is provided in the middle of the salt discharge pit, and the upper end of the partition 11 is fixedly connected to the bottom plate, and the bottom plate is detachable to facilitate the lifting operation of the salt discharge hopper 7. There is a gap between the lower end of the partition 11 and the bottom of the salt discharge pit. The partition 11 divides the area of ​​the salt discharge pit into a salt discharge area 9 and a dust collection area 10. During the salt discharge process, smoke and dust enter the dust collection area 10 from the bottom of the partition 11, solid particles are precipitated in this area, low-boiling point components are condensed, and the remaining exhaust gas is extracted by the negative suction pipe 12, thereby reducing the blockage of the negative suction pipeline.

[0025] According to the embodiment of the utility model, a feeding hopper 5 is installed at the end of the salt discharge channel straight pipe 4, and an automatic gate valve 6 is installed at the discharge port of the feeding hopper 5 to control the feeding amount. Lime is added to react with titanium tetrachloride in the waste salt to remove titanium tetrachloride, thereby avoiding the release of a large amount of acidic smoke when the salt discharge hopper 7 is hoisted out of the salt discharge pit 9 in the later stage.

[0026] According to an embodiment of the utility model, a compressed air purge pipe 8 is added to the salt discharge hopper 7 during the salt discharge process. The compressed air purge pipe 8 extends into the salt discharge hopper 7 through a movable plate arranged above the salt discharge pit, so as to completely remove titanium tetrachloride in the waste salt. At the same time, low-boiling point components in the waste salt are removed by compressed air purge and stirring to avoid volatilization and generation of smoke and dust in the later stage.

[0027] According to the embodiment of the utility model, an automatic gate valve 6 is provided in the middle of the straight pipe of the feeding hopper 5, which can automatically control the feeding amount of lime added to the feeding hopper 5. The automatic gate valve 6 is a pneumatic valve, and the opening of the valve is controlled by a remote computer according to the amount of salt discharged from the feeding port 1. The amount of salt discharged is proportional to the size of the valve opening.

[0028] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0030] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

Claims

1. A molten salt chlorination furnace salt discharge device, characterized in that: The invention comprises a three-way pipe for a salt discharge channel arranged above the salt discharge pit, wherein the upper end pipe of the three-way pipe for the salt discharge channel is connected to a feed outlet, the lower end pipe of the three-way pipe for the salt discharge channel is a buffer pipe, the middle pipe of the three-way pipe for the salt discharge channel is connected to a straight pipe for the salt discharge channel, and the tail of the straight pipe for the salt discharge channel extends into the salt discharge pit. A feeding hopper is installed above the straight pipe of the salt discharge flow channel, and an automatic gate valve is arranged in the middle of the straight pipe of the feeding hopper.

2. The molten salt chlorination furnace salt discharge device according to claim 1, characterized in that: A salt discharge hopper is placed in the salt discharge pit, and a compressed air flushing pipe is also arranged in the salt discharge hopper.

3. The molten salt chlorination furnace salt discharge device according to claim 2, characterized in that: The compressed air flushing pipe extends into the salt discharge hopper through a movable plate arranged above the salt discharge pit.

4. The salt discharge device of the molten salt chlorination furnace according to claim 1, characterized in that: The buffer tube stores high-temperature molten salt liquid to form a buffer area.

5. The molten salt chlorination furnace salt discharge device according to claim 1, characterized in that: The lower end of the buffer pipe is sealed by a sealing cover, the lower end of the sealing cover is connected to a three-way pipe bracket, and the three-way pipe bracket is placed on the bottom plate above the salt discharge pit.

6. The salt discharge device of the molten salt chlorination furnace according to claim 5, characterized in that: A partition is arranged in the middle of the salt-draining pit, the upper end of the partition is fixedly connected to the bottom plate, and there is a gap between the lower end of the partition and the bottom of the salt-draining pit.

7. The salt discharge device of the molten salt chlorination furnace according to claim 6, characterized in that: The partition divides the area of ​​the salt discharge pit into a salt discharge area and a dust collection area.

8. The molten salt chlorination furnace salt discharge device according to claim 7, characterized in that: A negative suction pipe is installed above the dust collecting area.

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