Fume collection device for recycled rubber production

Abstract

The present invention relates to a fume collection device for recycled rubber production, wherein the gas collecting hood comprises a double-layer flue and a single-layer flue; a partition is arranged in the double-layer flue, and the lower layer of the double-layer flue is connected to the single-layer flue; the gas collecting hood also comprises a connecting support, an inner cover, an outer cover and an air suction pipe, the connecting support is arranged on the top of the supporting foot, the outer cover is arranged on the connecting support, the double-layer flue and the single-layer flue are both arranged on the outer cover, the lower plate of the double-layer flue and the lower plate of the single-layer flue are provided with air suction holes, the upper end of the air suction pipe is connected to the air suction holes, and the lower end is connected to the air inlet of the inner cover; the support comprises a soft curtain, a supporting foot, a supporting plate and a side sealing plate, the supporting feet are arranged in groups of two, the side sealing plates are fixedly arranged on the upper part of the supporting feet, and the supporting plate is arranged between two adjacent groups of supporting feet; the soft curtain is arranged at the lower end of the supporting plate. The present invention can achieve a 95% collection efficiency for volatile sources by utilizing a hood-in-hood structure; a small amount of overflowing waste gas is collected by the negative pressure of the gas collecting hood to meet the national environmental protection emission standards.

Description

Technical Field

[0001] The invention relates to a fume collecting device for reclaimed rubber production, belonging to the technical field of reclaimed rubber production. Background Art

[0002] Waste rubber, waste tires and other waste rubber products are not easy to landfill and degrade. After burning, they produce a large amount of smoke and carbon monoxide, which seriously pollutes the air and has a great negative impact on the natural environment, vegetation growth, human health and other aspects. It is one of the most threatening industrial hazardous wastes.

[0003] The traditional high-temperature crushing and high-temperature and high-pressure dynamic sulfur-breaking processes will be accompanied by the generation of flue gas during the production process, causing serious secondary pollution, and there are also high energy consumption problems and safety hazards. Therefore, the reuse and reproduction of waste rubber plays an important role in getting rid of the shortage of rubber resources and solving the problem of solid waste pollution.

[0004] In recent years, domestic industrial environmental protection requirements have continued to maintain a high-pressure situation, and the requirements for safe emissions have become increasingly higher. Factory waste gas emissions are the focus of supervision, especially odor nuisance and failure to implement VOCs control requirements; VOCs Frontier According to the cases reported by the Ministry of Ecology and Environment, many companies were reported by environmental protection inspections due to the lack of waste gas collection, simple collection or damaged gas hoods, half collection and half discharge, and other problems, and were required to suspend operations for rectification.

[0005] At present, the traditional exhaust gas collection system is relatively simple, and the closed hood leaks air everywhere, making it difficult to form negative pressure and resulting in poor collection effect. Especially for those longer production lines, the pipeline pressure difference and energy loss are not well controlled, which often results in good collection effect in the front section but difficult collection in the back section. Summary of the invention

[0006] The purpose of the present invention is to overcome the above-mentioned shortcomings and provide a fume collection device for reclaimed rubber production.

[0007] The object of the present invention is achieved in that:

[0008] A fume collection device for recycled rubber production, characterized in that: it comprises a fume collecting hood and a support, wherein the fume collecting hood is arranged on the top of the support;

[0009] The gas collecting hood comprises a double-layer flue and a single-layer flue, the double-layer flue and the single-layer flue are connected in series, the double-layer flue is located in front of the single-layer flue, a first sealing plate is arranged at the end of the double-layer flue, and a second sealing plate is arranged at the end of the single-layer flue;

[0010] A partition is arranged in the double-layer flue, which divides the double-layer flue into an upper layer and a lower layer, and the lower layer of the double-layer flue is connected to the single-layer flue;

[0011] The air collecting hood also includes a connecting support, an inner cover, an outer cover and an air suction pipe. The connecting support is arranged on the top of the supporting foot, the outer cover is arranged on the connecting support, the double-layer flue and the single-layer flue are both arranged on the outer cover, and air suction holes are opened on the lower plate of the double-layer flue and the lower plate of the single-layer flue, the air suction holes are connected to the upper end of the air suction pipe, the lower end of the air suction pipe is connected to the air inlet of the inner cover, and the air outlet of the inner cover is connected to the fan;

[0012] The support comprises a soft curtain, a support foot, a support plate and a side sealing plate. The support feet are arranged in groups of two, the side sealing plates are fixedly arranged on the upper part of the support feet, and the support plate is arranged between two adjacent groups of support feet; the soft curtain is arranged at the lower end of the support plate.

[0013] Furthermore, the partition is T-shaped.

[0014] Furthermore, the tops of the double-layer flue and the single-layer flue are both provided with hanging rings.

[0015] Furthermore, the supporting foot includes a supporting frame and a base, the base includes an upper seat, a load-bearing block and a lower seat, the upper end of the load-bearing block is fixedly connected to the upper seat, the lower end of the load-bearing block is fixedly connected to the lower seat, the lower seat is fixed to the ground, and the lower plate of the supporting frame is fixedly connected to the upper seat by bolts.

[0016] Furthermore, both the double-layer flue and the single-layer flue adopt a segmented structure, and quick-release connections are used between multiple segments.

[0017] Furthermore, the soft curtain is a white transparent rubber roller curtain.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention relates to a fume collection device for recycled rubber production. Most of the industrial waste gas generated during the equipment processing passes through a single-layer flue and a double-layer flue, and enters the subsequent activated carbon adsorption and incineration treatment. The hood-in-hood structure can achieve a 95% collection efficiency for volatile sources; a small amount of overflowed waste gas is collected by the negative pressure of the gas collecting hood, and the collected waste gas is subsequently subjected to activated carbon adsorption and incineration treatment, so that harmful components in the waste gas can be removed and meet the national environmental protection emission standards.

[0020] 2. The present invention provides a fume collection device for recycled rubber production, wherein the supporting legs are connected to the base by bolts, which is convenient for hoisting and maintenance.

[0021] 3. The present invention provides a fume collection device for recycled rubber production. Both the double-layer flue and the single-layer flue adopt a segmented structure, and quick-release connections are used between multiple segments. When a part of the equipment needs to be repaired, the structure can be used to conveniently and quickly remove the gas collection hood in the area.

[0022] 4. The present invention provides a fume collection device for recycled rubber production. The fume hood and the soft curtain cooperate to form an independent space, and the fume in the fume hood is collected by negative pressure ventilation through a fan, thereby effectively preventing the fume from overflowing. The soft curtain is a white transparent rubber roller curtain, which not only ensures the airtightness of the fume collection device, but also facilitates the observation and operation of the production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a stereoscopic diagram of a fume collection device for reclaimed rubber production according to the present invention.

[0024] Figure 2 for Figure 1 Main view.

[0025] Figure 3 for Figure 1 Left view of .

[0026] Figure 4 for Figure 2 AA cross-section diagram.

[0027] Figure 5 Schematic diagram of the support foot of the present invention.

[0028] Figure 6 for Figure 1 A partial enlarged view of .

[0029] In the figure:

[0030] The first sealing plate 1, the double-layer flue 2, the soft curtain 3, the single-layer flue 4, the second sealing plate 5, the support 6, the side sealing plate 7, the connecting support 8, the inner cover 9, the supporting foot 10, the supporting frame 10.1, the base 10.2, the upper seat 10.2.1, the bearing block 10.2.2, the lower seat 10.2.3, the outer cover 11, the supporting plate 12, the air suction hole 13, the air suction pipe 14, the hanging ring 15, and the partition 16. DETAILED DESCRIPTION

[0031] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0032] In the rubber industry, raw materials such as raw rubber will produce harmful substances during the high-temperature plasticization and processing of rubber mixing, calendering, vulcanization and other processes. At the same time, organic substances with lower boiling points in the raw materials can also be released, and a series of chemical reactions will occur at high temperatures to produce a certain amount of smoke. For example, volatile organic compounds (VOCs) will not cause harm to human health when their total mass concentration does not exceed 0.2 mg / m3; when it is between 0.2 mg and 0.3 mg / m3, it will cause irritation and other discomfort symptoms in the human body; when it is in the range of 3 mg to 25 mg / m3, people will experience other symptoms such as headaches; when it exceeds 25 mg / m3, it will have obvious toxic effects on the human body.

[0033] See also Figure 1-2 , the present invention relates to a fume collection device for reclaimed rubber production, comprising a fume collecting hood and a support 6, wherein the fume collecting hood is arranged on the top of the support 6;

[0034] See also Figure 1-2 The gas collecting hood comprises a double-layer flue 2 and a single-layer flue 4, the double-layer flue 2 and the single-layer flue 4 are connected in series, the double-layer flue 2 is located in front of the single-layer flue 4, a first sealing plate 1 is provided at the end of the double-layer flue 2, and a second sealing plate 5 is provided at the end of the single-layer flue 4;

[0035] See also Figure 1-2 The support 6 includes a soft curtain 3, a support foot 10, a support plate 12 and a side sealing plate 7. The support feet 10 are arranged in groups of two. The side sealing plate 7 is fixedly arranged on the upper part of the support feet 10, and the support plate 12 is arranged between two adjacent groups of support feet 10; the soft curtain 3 is arranged at the lower end of the support plate 12. Since the equipment needs to be frequently entered and exited, the function of the soft curtain 3 is to facilitate the entry and exit of personnel to complete the production line operation. The soft curtain 3 is a white transparent rubber roller curtain. The soft curtain 3 not only ensures the airtightness of the smoke collection device, but also facilitates the observation and operation of the production line.

[0036] See also Figure 3-4 A partition 16 is provided in the double-layer flue 2, and the partition 16 is T-shaped. The partition 16 divides the double-layer flue 2 into an upper layer and a lower layer. The lower layer of the double-layer flue 2 is connected to the single-layer flue 4. The tops of the two single-layer flues 4 of the double-layer flue are provided with lifting rings 15, which are convenient for lifting with the support feet 10;

[0037] The air collecting hood further includes a connecting support 8, an inner cover 9, an outer cover 11 and an air suction pipe 14. The connecting support 8 is arranged on the top of the supporting foot 10, the outer cover 11 is arranged on the connecting support 8, the double-layer flue 2 and the single-layer flue 4 are both arranged on the outer cover 11, and air suction holes 13 are opened on the lower plate of the double-layer flue 2 and the lower plate of the single-layer flue 4. The air suction holes 13 are connected to the upper end of the air suction pipe 14, and the lower end of the air suction pipe 14 is connected to the air inlet of the inner cover 9, and the air outlet of the inner cover 9 is connected to the fan (not shown in the figure);

[0038] The longer the production line, the stricter the requirements on wind pressure and air volume design, pipeline layout, size and number of air suction holes 13, etc. If the design is improper, the air duct pressure drop is not well controlled, and the wind force layout is uneven, the exhaust gas collection at the back end will be worse. Many companies’ collection methods have better collection effects at the back end, but very poor collection effects at the front end, or even no collection effect at the front end. The present invention calculates the decreasing wind pressure and air volume, reasonably arranges the sizes of the main pipelines in different places, adopts a double-layer flue 2 at the front end, and a single-layer flue 4 at the back end. In particular, the number of openings in different positions of the air collection hood is strictly calculated, and the closer to the front end, the more air suction holes there are, thereby solving the problem of wind force matching of the entire collection system. Opening small holes in the air collection hood for collection is also the first domestic VOCs exhaust gas collection method;

[0039] For the separate collection of smoke source points, the hood-in-hood method is used for key treatment. The hood-in-hood is the combination of the outer hood 11 and the inner hood 9. The designed air volume, air pressure and pipe diameter are analyzed and calculated by the fluid software, and combined with the actual working conditions, the collection efficiency of the volatile source can reach 95%. The hood-in-hood design not only improves the collection rate, but also reduces power consumption;

[0040] In view of the 5% escaped gas in the hood-in-hood and the small amount of gas generated by auxiliary machines such as belt conveyors and screw conveyors, an independent space is formed by using a gas collection hood and a soft curtain 3, and the smoke in the hood is collected by negative pressure ventilation through a fan. Ventilation collection refers to the formation of a slight negative pressure in an independent space, and the gas in the independent space is ventilated as a whole by using the slight negative pressure. The purpose of the slight negative pressure is to ensure that the gas in the independent space only enters but does not exit, and to ensure that there is no gas escape. The hood-in-hood plus ventilation collection ensures that the gas collection rate reaches more than 99%, effectively preventing smoke overflow.

[0041] See also Figure 5 The supporting foot 10 includes a supporting frame 10.1 and a base 10.2. The base 10.2 includes an upper seat 10.2.1, a load-bearing block 10.2.2 and a lower seat 10.2.3. The upper end of the load-bearing block 10.2.2 is fixedly connected to the upper seat 10.2.1, and the lower end of the load-bearing block 10.2.2 is fixedly connected to the lower seat 10.2.3. The lower seat 10.2.3 is fixed to the ground. The lower plate of the supporting frame 10.1 is fixedly connected to the upper seat 10.2.1 by bolts, and is connected to the base by bolts, which is convenient for lifting and maintenance.

[0042] See also Figure 6 The double-layer flue 2 and the single-layer flue 4 both adopt a segmented structure, and the multiple segments are connected by quick-release fasteners. The function of this structure is that when the equipment needs to be repaired locally, the gas collecting hood in the area can be easily and quickly removed by using this structure.

[0043] Working principle:

[0044] Most of the industrial waste gas generated during the equipment processing passes through the single-layer flue 4 and the double-layer flue 2, and enters the subsequent activated carbon adsorption and incineration treatment. The hood-in-hood structure can achieve a 95% collection efficiency for volatile sources; a small amount of overflowed waste gas is collected by the negative pressure of the gas collecting hood, and the collected waste gas is subjected to subsequent activated carbon adsorption and incineration treatment, which can remove harmful components in the waste gas and meet the national environmental protection emission standards. Embodiment 1

[0045] The ventilation volume of general places (ventilation volume per square meter of floor area q) is as follows:

[0046]

[0047] The design parameters of the present invention are:

[0048] The total design air volume Q is 45000m³ / h, the wind speed design v=1m / s,

[0049] The required air volume at the volatile source point (hood in hood) is:

[0050] Q1=S1×v=2.2×1.45×1×3600=11484m³ / h

[0051] Q2= S2×v=2.4×1.35×1×3600=11664m³ / h

[0052] Q3= S3×v =1.8×1.2×1×3600=7776 m³ / h

[0053] The ventilation collection air volume is Q exchange = Q total - Q1 - Q2 - Q3 = 45000 - 11484 - 11664 - 7776 = 14076 m³ / h

[0054] The total volume of the sealing cover is: V cover = length × width × height = 14 × 2.7 × 5 = 189m³

[0055] Air exchange volume q = Q exchange / (V hood × v) = 14076 / (189 × 1) ≈ 74 m³ / (h · m2)

[0056] The ventilation volume reaches 74 m³ / (h·㎡), which is much larger than the design value of ordinary places, so the probability of organic smoke escape is almost non-existent.

[0057] In the above embodiments, the present invention is only exemplarily described, but those skilled in the art may make various modifications to the present invention without departing from the spirit and scope of the present invention after reading this patent application.

Claims

1. A fume collection device for reclaimed rubber production, characterized in that: It includes an air collecting hood and a support, wherein the air collecting hood is arranged on the top of the support; The gas collecting hood comprises a double-layer flue and a single-layer flue, the double-layer flue and the single-layer flue are connected in series, the double-layer flue is located in front of the single-layer flue, a first sealing plate is arranged at the end of the double-layer flue, and a second sealing plate is arranged at the end of the single-layer flue; A partition is arranged in the double-layer flue, which divides the double-layer flue into an upper layer and a lower layer, and the lower layer of the double-layer flue is connected to the single-layer flue; The air collecting hood also includes a connecting support, an inner cover, an outer cover and an air suction pipe. The connecting support is arranged on the top of the supporting foot, the outer cover is arranged on the connecting support, the double-layer flue and the single-layer flue are both arranged on the outer cover, and air suction holes are opened on the lower plate of the double-layer flue and the lower plate of the single-layer flue, the air suction holes are connected to the upper end of the air suction pipe, the lower end of the air suction pipe is connected to the air inlet of the inner cover, and the air outlet of the inner cover is connected to the fan, and the closer to the front end of the air collecting hood, the more air suction holes there are; The support includes a soft curtain, a support foot, a support plate and a side sealing plate. The support feet are arranged in groups of two, the side sealing plates are fixedly arranged on the upper part of the support feet, and the support plate is arranged between two adjacent groups of support feet; the soft curtain is arranged at the lower end of the support plate; The support foot includes a support frame and a base, the base includes an upper seat, a load-bearing block and a lower seat, the upper end of the load-bearing block is fixedly connected to the upper seat, the lower end of the load-bearing block is fixedly connected to the lower seat, the lower seat is fixed on the ground, and the lower plate of the support frame is fixedly connected to the upper seat by bolts; Both double-layer flues and single-layer flues adopt a segmented structure, and quick-release connections are used between multiple sections.

2. A fume collection device for reclaimed rubber production according to claim 1, characterized in that: The partition is T-shaped.

3. The fume collection device for reclaimed rubber production according to claim 1, characterized in that: There are hanging rings on the top of both the double-layer flue and the single-layer flue.

4. A fume collection device for reclaimed rubber production according to claim 1, characterized in that: The soft curtain is a white transparent rubber roller curtain.

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