阅读说明：本技术 一种用于天然橡胶配酸及尾气回收系统 (Acid preparation and tail gas recovery system for natural rubber ) 是由 杨宇 胡修皇 董祯国 徐美华 刀剑华 胡修良 戴忠峻 彭兰英 于 2020-08-11 设计创作，主要内容包括：本发明提供了一种用于天然橡胶配酸及尾气回收系统,包括加酸储罐、阀门开关、化工泵和稀释罐,所述加酸储罐底部通过不锈钢管连接阀门开关,阀门开关连接化工泵的进水口,所述化工泵的出水口连接稀释罐；还包括水喷射真空泵组,加酸储罐上设置有排气管以及显示装置。该系统代替现有插桶泵,解决了人工加酸时费时费力以及插桶泵容易损坏的问题,提高操作效率。同时,在加酸储罐顶部开口位置设置斜坡型倾倒口,实现甲酸桶与倾倒口的结合处更为紧密的技术效果。此外,所述加酸储罐上设置有排气管,所述排气管与水喷射真空泵组连接,将加酸储罐中的气体排出到水喷射真空泵组,实现每次加酸时刺鼻气体的减少,提高了操作人员的安全性。(The invention provides a natural rubber acid preparation and tail gas recovery system which comprises an acid adding storage tank, a valve switch, a chemical pump and a dilution tank, wherein the bottom of the acid adding storage tank is connected with the valve switch through a stainless steel pipe, the valve switch is connected with a water inlet of the chemical pump, and a water outlet of the chemical pump is connected with the dilution tank; the acid adding storage tank is provided with an exhaust pipe and a display device. This system replaces current barrel pump of inserting, wastes time and energy and inserts the easy problem of damaging of barrel pump when having solved artifical acidification, improves operating efficiency. Meanwhile, a slope-type pouring opening is arranged at the opening position of the top of the acid adding storage tank, so that the technical effect that the joint of the formic acid bucket and the pouring opening is tighter is realized. In addition, the acid adding storage tank is provided with an exhaust pipe, the exhaust pipe is connected with the water spraying vacuum pump set, and gas in the acid adding storage tank is discharged to the water spraying vacuum pump set, so that the amount of pungent gas is reduced during acid adding at each time, and the safety of operators is improved.)

1. The utility model provides a be used for natural rubber to join in marriage sour and tail gas recovery system, its characterized in that, is including adding sour storage tank, valve switch, chemical industry pump and dilution tank, add sour storage tank bottom and connect the valve switch through nonrust steel pipe, the water inlet of chemical industry pump is connected to the valve switch, the dilution tank is connected to the delivery port of chemical industry pump.

2. The natural rubber acid preparation and tail gas recovery system of claim 1, further comprising a water injection vacuum pump unit for pumping the gas stream from the acid addition storage tank.

3. The system for acid blending and tail gas recovery of natural rubber of claim 1, wherein the acid adding storage tank is shaped as a rectangular parallelepiped having dimensions of about 1.05 x height by 1 x width by 1 x length.

4. The system for acid preparation and tail gas recovery of natural rubber according to claim 1, wherein the acid adding storage tank, the valve switch and the chemical pump are all made of stainless steel.

5. The system for acid preparation and tail gas recovery from natural rubber of claim 1, wherein the bottom of the acid adding storage tank is "V" shaped in front view.

6. The system for preparing acid and recovering tail gas from natural rubber according to claim 1, wherein the acid adding storage tank is provided with a display device for displaying the liquid level in the acid adding storage tank.

7. The natural rubber acid preparation and tail gas recovery system as claimed in claim 1, wherein a formic acid pouring opening is formed in the top of the acid adding storage tank.

8. The system for recovering natural rubber acid and exhaust gas as in claim 7, wherein said formic acid pouring port is in a shape of a Chinese character 'hui' in a plan view, and has a trapezoid shape with a wide top and a narrow bottom in a longitudinal section in a plan view.

9. The natural rubber acid preparation and tail gas recovery system as claimed in claim 1, wherein the acid adding storage tank is provided with an exhaust pipe, the exhaust pipe is connected with the water injection vacuum pump set, and gas in the acid adding storage tank is discharged to the water injection vacuum pump set.

10. The system for acid blending and tail gas recovery of natural rubber of claim 1, wherein the acid adding storage tank is shaped as a cylinder with dimensions of about 1 meter in height and a cross-sectional diameter of about 1 meter.

Technical Field

The invention relates to the technical field of natural rubber production, in particular to a natural rubber acid preparation and tail gas recovery system.

Background

The natural rubber is generally referred to as an elastic solid obtained by collecting natural latex from Brazilian rubber trees and subjecting the natural latex to a processing step such as coagulation and drying. The natural rubber is a natural high molecular compound taking polyisoprene as a main component, the molecular formula is (C5H8) n, 91-94% of the natural rubber is rubber hydrocarbon (polyisoprene), and the balance is non-rubber substances such as protein, fatty acid, ash, saccharides and the like. Natural rubber is the most widely used rubber.

Natural rubber can be divided into two main categories according to form, namely solid natural rubber (rubber sheets and granular rubber) and concentrated latex. In daily use, solid natural rubber accounts for the vast majority of the proportion. In the process of manufacturing natural rubber from natural latex, a coagulation process may be required. The whole latex production process comprises the following processing technological processes: feeding latex into a factory, weighing the latex, filtering the latex, measuring the dry content of the latex, mixing the latex, diluting formic acid, calculating the acid amount, parallel flowing formic acid, curing, pressing, crimping, granulating, boxing, drying, packaging, warehousing and the like.

The current method of natural rubber coagulation is mainly acid coagulation, with formic acid being one of the main coagulating acids. In addition to natural coagulation during the process from latex to coagulation, in order to rapidly coagulate latex during production and processing, diluted latex is usually rapidly coagulated with diluted formic acid to achieve the purpose of production.

In the process of natural rubber solidification, the current commonly used mode is parallel flow acid addition, namely latex is placed in a mixing pool with a certain fall to be diluted to a certain proportion by adding water, and 85% high-concentration acid is manually pumped into a diluted acid pool by a barrel pump to be diluted to a certain proportion by water. The barrel inserting pump is a hand-held pump with one end provided with a suction pipe with the length of about 1 meter and the caliber of 20mm and the other end provided with an electric pump which are integrated into a whole. When the barrel pump is used, the suction pipe is directly inserted into the barrel, the handle of the barrel pump is held by two hands, and the switch is started to work. After the latex and the acid are diluted, the background computer system simultaneously opens the latex pool and the dilute acid pool valve, and the latex and the acid are introduced into the distribution groove through the pipeline, mixed and simultaneously flow into the coagulating groove at the rear end for coagulation.

The acid is classified into organic acid and inorganic acid. Organic acids refer to some organic compounds having acidity; inorganic acids, also known as mineral acids, are a generic name for acids in inorganic compounds. Formic acid (HCOOH) is an organic acid that is more acidic than carbonic acid, less acidic than hydrochloric acid, has an irritating odor, and is more corrosive. Formic acid is secreted when ants and mosquitoes bite, so formic acid is commonly called formic acid. Formic acid is a colorless and pungent liquid.

Most of formic acid sold in the market at present is 25 kg/barrel formic acid, the barrel is a square plastic barrel, and an outlet for pouring the formic acid is a round hole outlet with the caliber of 25mm and is tightly closed by a screw thread knob. The high-concentration formic acid needs manual assistance to support a barrel inserting pump in the filling process, and 40 barrels of the high-concentration formic acid are pumped to a dilution tank by the barrel pump every time according to the design yield. Because the caliber of the outlet of the 25 kg/barrel high-concentration formic acid barrel is small, when about 40 barrels of concentrated acid are pumped by using the barrel insertion pump, about 2 minutes are needed for pumping one barrel, about 70-80 minutes are needed for pumping 40 barrels, and the operation time is long. And because the formic acid bucket is the square barrel, and the bottom surface is flat, every bucket still can not be taken out cleanly once only, still need manual operation to fall remaining residual acid in other containers and carry out the secondary extraction once, waste time and energy. The acid has strong corrosivity and volatility, so the acid has great harm to human bodies, and mainly corrodes the skin and respiratory tract of the human bodies. The worker inhales a large amount of formic acid to cause suffocation and death, which is a great potential safety hazard in posts. This just needs operating personnel to contact concentrated acid for a long time directly, needs to wear protective articles such as gauze mask, goggles, gloves operation, has the potential safety hazard problem that spatters on the skin and corrosive gas attracts the health to cause the injury problem. And the high corrosiveness of formic acid also easily causes the damage of the barrel insertion pump.

Therefore, there is a need for a natural rubber complex acid system that is safe to use, long-lived, and efficient, thereby alleviating the problems described above.

Disclosure of Invention

In order to solve the problems, the invention provides a natural rubber acid preparation and tail gas recovery system, an acid adding storage tank matched with a formic acid barrel is arranged to replace the existing barrel inserting pump, and a water spraying vacuum pump set is matched at the same time, so that volatile concentrated acid smell is absorbed, filtered and recovered in time in the acid adding process, and the problems that time and labor are wasted during manual acid adding, potential safety hazards are formed due to close-range contact of operators, and the barrel inserting pump is easy to damage are solved.

In order to achieve the purpose, the invention provides a natural rubber acid preparation and tail gas recovery system which comprises an acid adding storage tank, a valve switch, a chemical pump and a dilution tank, wherein the bottom of the acid adding storage tank is connected with the valve switch through a stainless steel pipe, the valve switch is connected with a water inlet of the chemical pump, and a water outlet of the chemical pump is connected with the dilution tank.

Optionally, a water injection vacuum pump set is further included for extracting the gas flow in the acid adding storage tank.

Optionally, the acid addition storage tank is in the shape of a cuboid having dimensions of about 1.05 x height by 1 x length by 1 meter.

Optionally, the acid adding storage tank, the valve switch and the chemical pump are all made of stainless steel.

Optionally, the bottom of the acid adding storage tank is in a V shape in a front view angle.

Optionally, the acid adding storage tank is provided with a display device for displaying the liquid height in the acid adding storage tank.

Optionally, a formic acid pouring opening is formed in the top of the acid adding storage tank.

Optionally, the formic acid pouring opening is in a shape like a Chinese character 'hui' from a top view angle, and is in a trapezoid with a wide upper part and a narrow lower part from a vertical view angle of a longitudinal section.

Optionally, an exhaust pipe is arranged on the acidification storage tank, and the exhaust pipe is connected with the water injection vacuum pump set to exhaust the gas in the acidification storage tank to the water injection vacuum pump set.

Optionally, the acid addition tank is cylindrical in shape and has dimensions of about 1 meter in height and a cross-sectional diameter of about 1 meter.

The invention has the advantages and beneficial effects that: compared with the existing natural rubber production system which needs to manually hold a barrel inserting pump to pump 85% of high-concentration formic acid raw materials to a dilution tank, the natural rubber acid preparation and tail gas recovery system provided by the invention has the advantages that the existing barrel inserting pump is replaced by the acid adding storage tank matched with the formic acid barrel, the top of the acid adding storage tank is slightly lower than the ground where the dilution tank is placed, and operators can pour the formic acid conveniently; all hold in adding sour storage tank through formic acid with in the formic acid bucket, extract again and dilute in diluting the jar, waste time and energy and insert the easy problem of damaging of barrel pump when having solved artifical and adding sour, improve operating efficiency. Meanwhile, a slope-type pouring opening is formed in the top opening of the acid adding storage tank, so that when the concentrated formic acid is poured, the top of the formic acid barrel is directly buckled on the slope, and the technical effect that the joint of the formic acid barrel and the pouring opening is more compact is achieved. In addition, this system cooperates water injection vacuum pump package, sets up the blast pipe at acidification storage tank top, and the blast pipe is connected to water injection vacuum pump package, in time siphons away, filters, retrieves volatilizing concentrated acid smell in acidification process, realizes the reduction of sharp gaseous when acidification at every turn, has improved operating personnel's security.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only part of the descriptions of some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram of a natural rubber acid preparation and tail gas recovery system according to an embodiment of the present invention;

FIG. 2 is a schematic diagram illustrating an acid adding storage tank for a natural rubber acid preparation and tail gas recovery system according to an embodiment of the present invention;

FIG. 3 schematically illustrates a top view angular shape of a pour spout of an acid storage tank in accordance with an embodiment of the present invention;

FIG. 4 is a schematic diagram illustrating the cross-sectional elevation angle shape of a pour spout of an acid tank in accordance with an embodiment of the present invention.

Detailed Description

The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

In an embodiment, as shown in fig. 1, the invention provides a natural rubber acid preparation and tail gas recovery system, which includes an acid adding storage tank 101, a valve switch 102, a chemical pump 103 and a dilution tank 104, wherein the bottom of the acid adding storage tank 101 is connected to the valve switch 102 through a stainless steel pipe, the valve switch 102 is connected to a water inlet of the chemical pump 103, and a water outlet of the chemical pump 103 is connected to the dilution tank 104. Compare the current acidification system that adopts to insert the bucket pump and draw formic acid, the bucket pump is demolishd inserting current to this embodiment, adopts and adds acid storage tank 101 and replace and insert the bucket pump, adds acid storage tank 101 in the ground installation that leans on limit dilution jar one side to hold formic acid. The acid tank 101 can hold about 40 barrels of concentrated formic acid with a capacity of 25 kg/barrel at a time, and the top surface of the acid tank 101 is slightly lower than the ground to facilitate acid addition. After an operator pours the concentrated formic acid in the formic acid bucket into the acid adding storage tank 101 at one time, the valve switch 102 is opened, the chemical pump 103 is started, and the concentrated formic acid is pumped to the dilution tank 104 through the chemical pump. The system reduces manual operation, does not require a manual long-term hand-held barrel insertion pump to separately pump each barrel of formic acid, and provides overall efficiency.

In one embodiment, the system further includes a water jet vacuum pump assembly 105 for pumping the gas and water streams from the acidification tank 104. A water jet vacuum pump unit is a device for pumping out gas in a container by using high-speed jet flow through a nozzle to obtain vacuum, and is also called a jet vacuum pump. This embodiment incorporates a water jet vacuum pump set 105 that is connected to the acidification tank 101. Because formic acid is volatile and toxic to humans, water jet vacuum pump assembly 105 can extract the odor of the concentrated formic acid trapped in acid tank 101 and convert it into water vapor. The liquid formed by the vapor can also flow back to the acid adding storage tank 101 at a later stage to form a closed loop, so that the adverse effect of the strong smell on operators during the addition of the formic acid can be avoided.

In one embodiment, the acid addition reservoir 101 is in the shape of a rectangular parallelepiped and has dimensions of about 1.05 x height by 1 x length by 1 meter. Alternatively, the acidification tank 101 is cube in shape and has dimensions of about 1 × height by 1 × length by 1 meter, i.e. a volume of 1 cubic meter. In another embodiment, the acid addition tank 101 is cylindrical in shape and has dimensions of about 1 meter in height and a cross-sectional diameter of about 1 meter. The size and shape of the acid adding storage tank 101 can be selected according to actual needs.

In one embodiment, the acid tank 101, the valve switch 102, and the chemical pump 103 are all made of stainless steel. The stainless steel acidification storage tank 101 is made of 304 stainless steel, and the stainless steel pipe connected to the bottom is DN50 stainless steel pipe. The stainless steel material has better corrosion resistance and can better adapt to the formic acid environment.

In one embodiment, as shown in FIGS. 1 and 2, the bottom 1011 of the acid addition tank 101 is "V" shaped in elevation. Preferably, the bottom of the acidification tank 101 is tapered, or square-tapered. This arrangement facilitates thorough extraction of formic acid to the dilution tank, reducing the residue in the acidification tank 101. In one embodiment, a DN50 stainless steel pipe is welded at the bottom of the square cone of the acid adding storage tank 101, the stainless steel pipe has a 90-degree elbow, and then the stainless steel pipe is turned out to be connected with a stainless steel valve switch 102 and further connected with a water inlet of a stainless steel chemical pump 103, and a water outlet of the chemical pump 103 is connected with a dilution tank 104. Finally, the formic acid is pumped into a dilution tank 104 at the rear end from a water outlet at the bottom of the acid adding storage tank 101 through a stainless steel chemical pump 103.

In one embodiment, as shown in FIG. 2, the acid adding storage tank 101 is equipped with a display unit 1012 for displaying the liquid level in the acid adding storage tank. The display device may be a glass transparent scale. In order to facilitate the operator to know the real-time scale of the liquid in the tank, a glass transparent graduated scale is longitudinally arranged on one side edge of the stainless steel tank body, which is close to the dilution tank. The scale may be part of the body of the acidification tank 101, integral with the stainless steel tank. In another embodiment, the display device is a liquid crystal display or an LED display, and the height of the liquid in the tank is sensed by arranging a sensor in the tank body, and then the liquid height is dynamically displayed. In other embodiments, a sensor is arranged in the tank body to sense the height of the liquid in the tank body, and the height of the liquid is displayed through a graduated scale on the surface, so that the position of the liquid in the liquid can be visually represented. The important function of the display device is that after all formic acid is pumped into the dilution tank each time, clear water is required to be injected into the acid adding storage tank 101 to clean the residual acid in the storage tank 101. Since the clean water for cleaning is subsequently used in the process of automated dilution, a very precise water consumption is required. Then, the height of the fresh water injected each time needs to be kept consistent, and the display device can clearly and accurately display the height of the water injected into the acidification tank 101, so that the total required water consumption of the subsequent automatic dilution can be calculated to be connected with an automatic calculation control system of the co-current acidification.

In one embodiment, as shown in FIGS. 1 and 2, the top of the acid tank 101 is provided with a formic acid pour 1013. The pouring opening is used for an operator to pour the formic acid solution in the formic acid bucket into the acid adding storage tank 101. As shown in FIGS. 3 and 4, the formic acid pouring port is in a shape of a Chinese character 'hui' in a plan view, and is in a shape of a trapezoid having a wide upper part and a narrow lower part in a vertical view. This arrangement forms a sloped pour spout. Meanwhile, the opening diameter of the lower end of the pouring opening is slightly smaller than the perimeter of the cross section of the concentrated formic acid barrel, so that the top of the formic acid barrel can be directly buckled on a slope when concentrated formic acid is poured every time, and the combination part of the formic acid barrel and the pouring opening is tighter. Because the top of the acidification storage tank 101 is basically level with the ground where the dilution tank is located, the time and labor are saved when the formic acid is poured conveniently, and after the concentrated acid cover is unscrewed, the slope storage tank opening is directly buckled on the storage tank opening by utilizing the design.

In one embodiment, the acid storage tank 101 is provided with an exhaust pipe 106, and the exhaust pipe 106 is connected to the water injection vacuum pump unit to exhaust the gas in the acid storage tank 101 to the water injection vacuum pump unit 105. The water jet vacuum pump set 105 is simultaneously activated when the operator enriches the formic acid. The formic acid volatile gas confined in the acidification tank 101 is discharged to the water injection vacuum pump unit 105 through the exhaust pipe 106. At this point, a pressurized stream of water is ejected through the jet stream in the water jet vacuum pump assembly 105. Because the flow velocity of the sprayed water is extremely high, the pressure energy is converted into the velocity energy, so that the pressure in the suction area is reduced to generate vacuum. Thereby utilizing the fluid to transfer energy and mass, and achieving a vacuum environment. The high-speed water flow snatches the sucked gas away, and the gas is fully mixed and compressed with the throat diameter through the contraction section of the venturi tube to carry out molecular diffusion energy exchange with balanced speed. When the gas passes through the expansion section, the speed is reduced, the pressure is increased, the gas is sprayed into the water storage tank (pool) from the outlet and is greater than the atmospheric pressure, and the non-condensable gas is separated out. The water is recycled by the centrifugal pump to finish the air suction process flow. The water at the later stage also flows back to the acid adding storage tank 101 to form a closed loop. In the process of the cycle work, the pungent gas is reduced when the acid is added every time, and the safety performance of personnel is improved.

Through the above-mentioned a be used for natural rubber to join in marriage sour and tail gas recovery system, set up and replace current barrel pump of inserting with the supporting sour storage tank of formic acid bucket, the top of adding sour storage tank is less than the ground that the dilution tank was put a little, and the operating personnel of being convenient for emptys formic acid. All hold in adding sour storage tank through formic acid with in the formic acid bucket, extract again and dilute in diluting the jar, waste time and energy and insert the easy problem of damaging of barrel pump when having solved artifical and adding sour, improve operating efficiency. Meanwhile, a slope-type pouring opening is formed in the top opening of the acid adding storage tank, so that when the concentrated formic acid is poured, the top of the formic acid barrel is directly buckled on the slope, and the technical effect that the joint of the formic acid barrel and the pouring opening is more compact is achieved. In addition, the display device is arranged outside the acidification storage tank, so that the height of liquid in the acidification storage tank can be clearly and accurately displayed, operators can conveniently know the real-time situation and calculate the total required water consumption of subsequent automatic dilution, and the automatic calculation control system is conveniently applied to a subsequent parallel flow acidification. In addition, this system cooperation water sprays vacuum pump group sets up the blast pipe at acidification storage tank top, and the blast pipe is connected to true water and sprays vacuum pump group, realizes in time absorbing away, filtering, retrieving volatile concentrated acid smell at acidification in-process for the gaseous reduction of dazzling when adding acid at every turn has solved the potential safety hazard problem that operating personnel closely contacted formation.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. While the spirit and principles of the invention have been described with reference to the above specific embodiments, it is to be understood that the invention is not limited to the specific embodiments disclosed, nor is the division of the aspects, which is for convenience only as the features in these aspects cannot be combined to advantage. Thus, the present application is not intended to be limited to the embodiments shown herein. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.