Fluidized slag discharge valve

Abstract

The utility model discloses a fluidization deslagging valve which comprises a material cavity, a partition plate, a loosening air chamber and a conveying air chamber, the top of the partition plate is vertically fixed to the top wall of the material cavity, the material cavity is divided into a loosening chamber and a conveying chamber, a first distance is formed between the partition plate and a bottom plate of the material cavity, and the loosening chamber and the conveying chamber are communicated at the bottom of the material cavity; a feed port is formed in the upper end of the loosening chamber; a discharge port is formed in the upper end of the conveying chamber; a plurality of vent holes are evenly formed in a bottom plate of the loosening chamber, and the loosening air chamber is connected to the lower portion of the loosening chamber so as to provide loosening air for the loosening chamber. A plurality of vent holes are evenly formed in a bottom plate of the conveying chamber, and the conveying air chamber is connected to the lower portion of the conveying chamber so as to provide conveying air for the conveying chamber. According to the utility model, the flowing characteristic of the solid material is fully utilized, and the ultra-dense phase conveying of the solid material is realized under the condition that the solid material in the valve body is kept fluidized by supplying a small amount of gas.

Description

Technical Field

[0001] The utility model relates to the technical field of material conveying, in particular to a fluidized slag discharge valve. Background Art

[0002] The reserves of vanadium-titanium magnetite are very rich in the world, and my country's reserves are among the highest. The reserves in Panzhihua alone reach 10 billion tons, and the total reserves of titanium resources rank first in the country. Vanadium-titanium magnetite is a multi-element symbiotic ore, containing 30~34Wt% iron (existing in the form of iron oxide in the ore), which is mainly used as a raw material for extracting iron, vanadium and titanium; the vanadium-titanium iron concentrate produced in the Panzhihua area contains a certain amount of TiO2, which enters the blast furnace slag after smelting in the blast furnace and is discarded, and cannot be fully utilized, which greatly affects the comprehensive utilization efficiency of titanium resources in the vanadium-titanium magnetite in the Panzhihua area.

[0003] In order to make full use of blast furnace slag, the process of "high temperature carbonization of blast furnace slag and low temperature selective chlorination to generate TiCl4" was studied to extract Ti from blast furnace slag. After high temperature carbonization, blast furnace slag forms carbonized slag with a TiC content of 10%~15%. TiC is dispersed in the slag, with low grade and high impurity content. In order to improve the yield of Ti in blast furnace slag, a two-stage chlorination process is usually adopted. There are certain differences in the concentration of chlorine and the composition of tail gas in the two-stage chlorination process, and the tail gas contains a large amount of toxic and harmful gases. Once leaked, it will cause serious environmental pollution. The temperature of carbonized slag after one-stage chlorination in a boiling chlorination furnace is 500℃~700℃. The tail gas of the first-stage chlorination mainly contains toxic and corrosive gases such as Cl2, HCl, and TiCl4. Therefore, the transportation of materials in the two-stage chlorination process becomes an important part of this process.

[0004] In order to keep the two-stage chlorination material transportation unobstructed, continuous in and out, effective isolation of the atmosphere, and the material entering the second stage of chlorination with a small amount of gas, so as to reduce the tail gas system load and maintain stable operation of the system. Conventional silos plus ordinary valves for intermittent discharge can no longer meet the current process requirements. If multiple sets of equipment are used in series, the structure will be complicated, and high-grade anti-corrosion and temperature-resistant materials must be used, which is costly and occupies a large space. Therefore, seeking a slag discharge valve with low cost, which can achieve unobstructed transportation of two-stage chlorination materials and effective isolation of the atmosphere, has become a technical problem that needs to be solved in this field.

[0005] Based on this, the existing technology still needs to be improved. Utility Model Content

[0006] In order to solve the above technical problems, the embodiment of the utility model proposes a fluidized slag discharge valve to solve the technical problems of large amount of gas introduced and inability to achieve effective atmosphere isolation caused by ordinary valves for intermittent discharge in the prior art.

[0007] In order to solve the above technical problems, some embodiments of the utility model disclose a fluidized slag discharge valve, comprising a material chamber, a partition, a loosening air chamber and a conveying air chamber, wherein the top of the partition is vertically fixed to the top wall of the material chamber to separate the material chamber into a loosening chamber and a conveying chamber, and there is a first distance between the partition and the bottom plate of the material chamber, so that the loosening chamber and the conveying chamber are connected at the bottom of the material chamber;

[0008] The upper end of the loosening chamber is provided with a feed port, and the upper end of the conveying chamber is provided with a discharge port;

[0009] A plurality of vent holes are evenly arranged on the bottom plate of the loosening chamber, and the loosening air chamber is connected below the loosening chamber to provide loosening gas to the loosening chamber;

[0010] A plurality of vent holes are evenly arranged on the bottom plate of the conveying chamber, and the conveying gas chamber is connected below the conveying chamber to provide conveying gas to the conveying chamber.

[0011] In some embodiments, the bottom plate of the loosening chamber is the top surface of the first gas distributor, and the loosening chamber is sealingly connected to the bottom surface of the first gas distributor;

[0012] The bottom plate of the conveying chamber is the top surface of the second gas distributor, and the conveying gas chamber is sealedly connected to the bottom surface of the second gas distributor.

[0013] In some embodiments, the first gas distributor and the second gas distributor have the same structure, including an upper plate, a lower plate and a rectangular frame, the upper plate and the lower plate are respectively sealed and fixed at the upper and lower openings of the rectangular frame, and a plurality of ventilation holes are provided on the upper plate and the lower plate.

[0014] In some embodiments, a filter screen is further provided in the middle of the rectangular frame, and the upper plate, the lower plate and the filter screen are arranged in parallel.

[0015] In some embodiments, at least one of the four walls of the rectangular frame is detachably arranged.

[0016] In some embodiments, the height of the partition is one-half to two-thirds of the height of the material chamber.

[0017] In some embodiments, the cross-section of the material cavity is square.

[0018] In some embodiments, a feed flange and a discharge flange are further included, wherein the feed port is connected to the feed flange via a feed pipe; and the discharge port is connected to the discharge flange via a discharge pipe.

[0019] In some embodiments, the diameter of the vent hole is 1 mm-2 mm.

[0020] In some embodiments, the loosening air chamber and the conveying air chamber have the same structure, including an inverted cone-shaped air cavity and an air inlet connected to the lower end of the air cavity.

[0021] By adopting the above technical solution, the utility model has at least the following beneficial effects:

[0022] The utility model provides a fluidized slag discharge valve, which makes full use of the flow characteristics of solid materials, and realizes super-dense phase transportation of solid materials while maintaining the fluidization condition of solid materials in the valve body by supplying a small amount of gas; at the same time, material plugging is used to realize gas-solid separation; the flow properties of solid materials and gas-solid mixtures during transportation are fully considered, and quantitative, continuous and stable transportation is realized by adjusting the conveying gas volume while ensuring quantitative control, reflecting the requirements of flexible adjustment and good sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 The present invention is a schematic structural diagram of a fluidized slag discharge valve disclosed in some embodiments of the present invention.

[0025] Description of reference numerals:

[0026] 1. Feed inlet; 2. Loosening chamber; 3. Loosening gas chamber; 4. Partition; 5. Transporting gas chamber; 6. Second gas distributor; 7. Transporting chamber; 8. Discharge port; 9. First gas distributor. DETAILED DESCRIPTION

[0027] The following is a further detailed description of the embodiments of the present disclosure in conjunction with the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to exemplarily illustrate the principles of the present disclosure, but cannot be used to limit the scope of the present disclosure. The present disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

[0028] The present disclosure provides these embodiments to make the present disclosure thorough and complete, and to fully express the scope of the present disclosure to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, and not as limiting.

[0029] It should be noted that, in the description of the present disclosure, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0030] In addition, the words "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" does not mean vertical in the strict sense, but is within the tolerance range. "Parallel" does not mean parallel in the strict sense, but is within the tolerance range. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0031] It should also be noted that in the description of the present disclosure, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0032] All terms used in the present disclosure have the same meanings as those understood by those of ordinary skill in the art to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, for example, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined as such herein.

[0033] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0034] like Figure 1As shown, some embodiments of the utility model disclose a fluidized slag discharge valve, which can be mainly used for gas-solid transportation between high temperature / normal temperature, different atmosphere reactors, and toxic and harmful medium reactors in related process in the chemical field, and can realize gas-solid separation, quantitative, continuous and stable transportation under sealed conditions. It includes a material chamber, a partition 4, a loosening air chamber 3 and a conveying gas 5, wherein the top of the partition 4 is vertically fixed to the top wall of the material chamber to divide the material chamber into a loosening chamber 2 and a conveying chamber 7, and there is a first distance between the partition 4 and the bottom plate of the material chamber, so that the loosening chamber 2 and the conveying chamber 7 are connected at the bottom of the material chamber; a feed port 1 is provided at the upper end of the loosening chamber 2, and a discharge port 8 is provided at the upper end of the conveying chamber 7; a plurality of vents are evenly arranged on the bottom plate of the loosening chamber 2, and the loosening air chamber 3 is connected to the bottom of the loosening chamber 2 to provide loosening gas to the loosening chamber 2; a plurality of vents are evenly arranged on the bottom plate of the conveying chamber 7, and the conveying gas 5 is connected to the bottom of the conveying chamber 7 to provide conveying gas to the conveying chamber 7.

[0035] When in use, the material falls vertically from the feed port 1 into the loosening chamber 2. Due to the presence of the partition 4, the valve body, i.e., the material chamber, is divided into the loosening chamber 2 and the conveying chamber 7; after the first stage of chlorination, the material enters the loosening chamber 2 of the slag discharge valve by gravity and accumulates, forming a material seal, which effectively isolates the gas between the first stage chlorination furnace and the second stage chlorination furnace. In order to maintain a better material seal, solid phase materials should be kept in the loosening chamber 2 and the pipeline at the feed port 1 for a long time. At the same time, due to the existence of the first distance, part of the material enters the conveying chamber 7 through the gap. Generally, the height of the partition 4 can be set to one-half to two-thirds of the height of the material chamber. It can not only achieve effective atmosphere isolation, but also ensure that enough material enters the conveying chamber 7, ensuring the effective conveying of the material. The conveying gas 5 conveys gas from the lower end of the conveying chamber 7, so that the material moves upward, and finally is discharged from the rear discharge port 8, and finally enters the second stage chlorination furnace, realizing continuous conveying of the material. According to the current carbonized slag process requirements, the carbonized slag after the first stage chlorination can be continuously and stably transported to the second stage boiling chlorination furnace through the slag discharge valve, and the material flow can be effectively controlled. The flue gas between the first stage chlorination furnace and the second stage chlorination furnace is isolated, there is no backflow, the system is sealed, and the gas does not leak, ensuring the continuous and stable operation of the system.

[0036] The fluidized slag discharge valve disclosed in some embodiments of the utility model, on the basis of the above embodiments, in order to ensure the stable delivery of gas, the bottom plate of the loosening chamber 2 is the top surface of the first gas distributor 9, and the loosening air chamber 3 is sealedly connected to the bottom surface of the first gas distributor 9; the bottom plate of the conveying chamber 7 is the top surface of the second gas distributor 6, and the conveying gas 5 is sealedly connected to the bottom surface of the second gas distributor 6. That is, the loosening chamber 2 and the loosening air chamber 3, as well as the conveying chamber 7 and the conveying gas 5 are connected through the gas distributor. The arrangement of the first gas distributor 9 and the second gas distributor 6 enables the gas volume in the loosening chamber 2 and the gas volume in the conveying chamber 7 to be adjusted and stably delivered respectively.

[0037] In the above embodiment, the first gas distributor 9 and the second gas distributor 6 have the same structure, including an upper plate, a lower plate and a rectangular frame, the upper plate and the lower plate are respectively sealed and fixed at the upper and lower openings of the rectangular frame, and a plurality of vents are arranged on the upper plate and the lower plate. During gas delivery, the gas output by the delivery gas 5 or the loosening air chamber 3 first passes through the lower plate, enters the rectangular buffer chamber between the lower plate and the upper plate, and then is ejected through the upper plate, and the ejected gas pressure is relatively stable and uniform. At the same time, in order to prevent the materials in the delivery chamber 7 and the loosening chamber 2 from falling from the vents, a filter screen can be further arranged in the middle of the rectangular frame, and the upper plate, the lower plate and the filter screen are arranged in parallel. The filter screen can receive the fallen materials, and the setting of the filter screen can adopt the method of opening an installation groove on the inner wall of the rectangular frame. At the same time, at least one of the four walls of the rectangular frame is set to be detachable, and the cleaning of the materials on the filter screen can be achieved through the detachable wall. The detachable wall can be detachable by setting sockets on two adjacent walls and inserting strips at both ends of the detachable wall, and the detachable connection is achieved by corresponding insertion and withdrawal of the inserting strips and the sockets. After the detachable wall is removed, the filter can be pulled out for cleaning.

[0038] Some embodiments of the utility model disclose a fluidized slag discharge valve. On the basis of the above embodiments, the cross-section of the material cavity is rectangular, that is, the material cavity as a whole is square. The feed port 1 is connected to the feed flange through a feed pipe; the discharge port 8 is connected to the discharge flange through a discharge pipe. The diameter of the vent is 1mm-2mm. The loosening air chamber 3 and the conveying gas 5 have the same structure, including an inverted cone-shaped air cavity and an air inlet connected to the lower end of the air cavity. A loosening gas valve is installed at the lower end of the loosening air chamber 3, and a conveying gas valve is installed at the lower end of the conveying gas 5. When in use, the loosening gas valve is opened, and a small amount of loosening gas is passed to keep the material in the loosening chamber 2 in a fluidized state and enter the conveying chamber 7; at the same time, the conveying gas valve is opened, and a certain amount of conveying gas (usually 2 to 5 times the amount of loosening gas) is introduced. Under the action of gas and pressure, solid phase transportation is realized. The solid phase flow rate is controlled by adjusting the conveying gas volume. The conveying gas 5 and the loosening gas chamber 3 are both provided with gas distributors to ensure that the conveying gas and the loosening gas enter the conveying chamber 7 and the loosening chamber 2 evenly, and the solid phase material is in a good fluidized state in the loosening chamber 2 and the conveying chamber 7. In addition, the material of the fluidized slag discharge valve can be determined according to the temperature of the solid material to determine whether to set a high temperature resistant lining.

[0039] In summary, the fluidized slag discharge valve disclosed in the embodiment of the utility model is mainly used for high-temperature (or normal temperature) solid and particulate material transportation, and at the same time realizes effective separation of gas-solid mixed materials and gas phase isolation. It can be used for high-temperature or normal temperature transportation of solid materials and gas-solid mixtures. For gas-solid mixed materials, it can effectively realize gas-solid separation and isolation when adjusting the material size: the solid material transportation volume is mainly achieved by adjusting the transportation gas volume; the gas sealing performance is good to avoid gas leakage and material leakage during operation; the structure is simple and the function is reliable. When used for material transportation between the chlorination furnaces at both ends, it can realize effective control of the material flow rate, isolate the smoke between the first stage chlorination furnace and the second stage chlorination furnace, prevent backflow, seal the system, and prevent gas leakage, so as to ensure continuous and stable operation of the system.

[0040] So far, various embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0041] Although some specific embodiments of the present disclosure have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present disclosure. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict.

Claims

1. A fluidized slag discharge valve, characterized in that: It comprises a material chamber, a partition, a loosening air chamber and a conveying air chamber, wherein the top of the partition is vertically fixed to the top wall of the material chamber to separate the material chamber into a loosening chamber and a conveying chamber, and there is a first distance between the partition and the bottom plate of the material chamber so that the loosening chamber and the conveying chamber are connected at the bottom of the material chamber; The upper end of the loosening chamber is provided with a feed port, and the upper end of the conveying chamber is provided with a discharge port; A plurality of vent holes are evenly arranged on the bottom plate of the loosening chamber, and the loosening air chamber is connected below the loosening chamber to provide loosening gas to the loosening chamber; A plurality of vent holes are evenly arranged on the bottom plate of the conveying chamber, and the conveying gas chamber is connected below the conveying chamber to provide conveying gas to the conveying chamber.

2. The fluidized slag discharge valve according to claim 1, characterized in that: The bottom plate of the loosening chamber is the top surface of the first gas distributor, and the loosening chamber is sealingly connected to the bottom surface of the first gas distributor; The bottom plate of the conveying chamber is the top surface of the second gas distributor, and the conveying gas chamber is sealedly connected to the bottom surface of the second gas distributor.

3. The fluidized slag discharge valve according to claim 2, characterized in that: The first gas distributor and the second gas distributor have the same structure, including an upper plate, a lower plate and a rectangular frame. The upper plate and the lower plate are respectively sealed and fixed at the upper and lower openings of the rectangular frame, and a plurality of ventilation holes are arranged on the upper plate and the lower plate.

4. The fluidized slag discharge valve according to claim 3, characterized in that: A filter screen is also provided in the middle of the rectangular frame, and the upper plate, the lower plate and the filter screen are arranged in parallel.

5. The fluidized slag discharge valve according to claim 4, characterized in that: At least one of the four walls of the rectangular frame is detachably arranged.

6. The fluidized slag discharge valve according to claim 1, characterized in that: The height of the partition is one half to two thirds of the height of the material chamber.

7. The fluidized slag discharge valve according to claim 1, characterized in that: The cross section of the material chamber is square.

8. The fluidized slag discharge valve according to claim 1, characterized in that: It also includes a feed flange and a discharge flange. The feed port is connected to the feed flange via a feed pipe; the discharge port is connected to the discharge flange via a discharge pipe.

9. The fluidized slag discharge valve according to claim 1, characterized in that: The diameter of the vent hole is 1mm-2mm.

10. The fluidized slag discharge valve according to claim 1, characterized in that: The loosening air chamber and the conveying air chamber have the same structure, including an inverted cone-shaped air cavity and an air inlet connected to the lower end of the air cavity.

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