Waste gas heat recovery device in silicone production

Abstract

A waste heat recovery device for waste gas in the production of organic silicon includes a heat exchange chamber and a water tank located at the bottom of the heat exchange chamber. An exhaust pipe is provided on the top of the heat exchange chamber. The exhaust pipe is arranged in an "S" shape in the heat exchange chamber to form an exhaust gas flow channel. One end of the exhaust pipe extends downward into the water tank. A circulating water pipe is wound around the exhaust pipe portion in the heat exchange chamber. The circulating water pipe is a coil structure. Both ends of the circulating water pipe extend into the water tank, and one end is connected to a water supply pump arranged in the water tank. The new device adopts the above structure to increase the contact area between the exhaust gas and the circulating water, improve the heat exchange efficiency, and effectively solve the problem of impurities in the exhaust gas through a precise water circulation system and a filtering device, thereby ensuring the efficient and stable operation of the equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of organic silicon production, in particular to a waste gas waste heat recovery device in organic silicon production. Background Art

[0002] In the production process of organic silicon, a large amount of high-temperature waste gas is generated due to chemical reactions and heating operations. If these waste gases are directly discharged into the atmosphere, it will not only waste considerable energy resources, but also have a negative impact on the environment, which does not meet the current requirements of energy conservation, emission reduction and sustainable development. Therefore, effectively recovering and utilizing the waste heat in these waste gases has become an important measure to improve energy efficiency, reduce production costs and protect the environment.

[0003] Traditional waste heat recovery technologies for waste gas are mostly focused on the application of heat exchangers, which transfer waste gas heat to cold sources such as cold water or air through the circulation of heat media, and convert it into reusable heat energy. However, when faced with the complex working conditions unique to silicone production, this type of technology often has problems such as low efficiency, high maintenance costs, and large equipment size. Especially when dealing with waste gas containing certain corrosive or particulate matter, heat exchange efficiency and equipment durability are even more challenging. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a waste heat recovery device for exhaust gas in the production of organic silicon, which increases the contact area between the exhaust gas and the circulating water, improves the heat exchange efficiency, and effectively solves the problem of impurities in the exhaust gas through a precise water circulation system and a filtering device, thereby ensuring the efficient and stable operation of the equipment, thereby showing significant technical advantages in the field of energy conservation and emission reduction in the production of organic silicon.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a waste heat recovery device for waste gas in organic silicon production, comprising a heat exchange chamber and a water tank located at the lower part of the heat exchange chamber, an exhaust gas pipe is penetrated through the top of the heat exchange chamber, the exhaust gas pipe is arranged in an "S" shape in the heat exchange chamber to form an exhaust gas flow channel, and one end of the exhaust gas pipe extends downward into the water tank;

[0006] A circulating water pipe is wound around the exhaust pipe portion in the heat exchange cavity. The circulating water pipe is a coil structure. Both ends of the circulating water pipe extend into the water tank, and one end is connected to a water supply pump arranged in the water tank.

[0007] In a preferred solution, a spiral groove is provided on the outer wall of the exhaust pipe, and the circulating water pipe is arranged in the spiral groove.

[0008] In a preferred solution, a straight water inlet pipe and a straight water outlet pipe are respectively provided at both ends of the circulating water pipe. The straight water inlet pipe is connected to a water pump, and the straight water outlet pipe is arranged through the top wall of the water tank.

[0009] In a preferred solution, a water inlet and a water outlet are provided on the side wall of the water tank, the water inlet is located at the upper part of the side wall of the water tank, and the water outlet is located at the lower part of the side wall of the water tank.

[0010] In the preferred scheme, a side baffle is provided at one end of the top surface of the water tank, an opening is provided on the side plate of the water tank opposite to the side baffle, a sealing baffle is installed in the opening, the side baffle, the sealing baffle and the side walls of the water tank together form a rectangular cavity, the output end of the straight water outlet pipe extends into the rectangular cavity, and the end of the exhaust pipe located in the water tank passes through the side baffle and also extends into the rectangular cavity.

[0011] In a preferred solution, a filter plate is provided at the bottom of the rectangular cavity, and a filter net is provided on the filter plate.

[0012] In a preferred solution, a sealing layer is provided on the inner side of the sealing baffle, and the sealing layer and the opening on the side plate of the water tank are sealed by interference fit;

[0013] An exhaust port is arranged on the outer side of the sealing baffle, the exhaust port is connected with the rectangular cavity and the external space of the water tank, and an exhaust pipe is installed on the exhaust port.

[0014] The waste heat recovery device for waste gas in the production of organic silicon provided by the utility model has the following beneficial effects by adopting the above structure:

[0015] (1) By setting an "S"-shaped exhaust pipe in the heat exchange chamber and adding a spiral groove built-in circulating water pipe on the outer wall of the exhaust pipe, the contact time and surface area between the exhaust gas and the circulating water are greatly increased, thereby improving the heat exchange efficiency, allowing the waste heat in the exhaust gas to be more fully recovered and utilized, reducing energy waste;

[0016] (2) The introduced filtering device, including the filter plate and the filter screen on it, can effectively intercept particulate matter and impurities in the exhaust gas, prevent the heat exchange system from being blocked, extend the service life of the equipment, and reduce maintenance costs. The design of the sealing layer ensures the sealing performance of the system, avoids leakage, and further improves the overall stability and safety;

[0017] (3) The circulating water in the water tank can not only be used as a heat exchange medium, but also as an adsorbent for particulate impurities in the exhaust gas, so that the exhaust gas emissions meet the standards and avoid the pollution of the environment by impurity particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0020] Figure 2 This is a schematic diagram of the exhaust pipe segment structure of the utility model.

[0021] In the figure: water tank 1, heat exchange chamber 2, exhaust pipe 3, spiral groove 301, circulating water pipe 4, water inlet straight pipe 401, water outlet straight pipe 402, water supply pump 5, water inlet 6, water outlet 7, side baffle 8, filter plate 9, filter net 901, sealing baffle 10, sealing layer 11, exhaust port 12, outlet pipe 13. DETAILED DESCRIPTION

[0022] like Figure 1-2 In the invention, a waste heat recovery device for waste gas in the production of organic silicon comprises a heat exchange chamber 2 and a water tank 1 located at the lower part of the heat exchange chamber 2, wherein an exhaust pipe 3 is provided on the top of the heat exchange chamber 2, and the exhaust pipe 3 is arranged in an "S" shape in the heat exchange chamber 2 to form an exhaust gas flow channel, and one end of the exhaust pipe 3 extends downward into the water tank 1;

[0023] A circulating water pipe 4 is wound around the exhaust pipe 3 in the heat exchange chamber 2. The circulating water pipe 4 is a coil structure. Both ends of the circulating water pipe 4 extend into the water tank 1, and one end is connected to a water pump 5 arranged in the water tank 1.

[0024] In a preferred solution, a spiral groove 301 is provided on the outer wall of the exhaust pipe 3 , and the circulating water pipe 4 is arranged in the spiral groove 301 .

[0025] In a preferred solution, a straight water inlet pipe 401 and a straight water outlet pipe 402 are respectively provided at both ends of the circulating water pipe 4 . The straight water inlet pipe 401 is connected to the water pump 5 , and the straight water outlet pipe 402 is arranged through the top wall of the water tank 1 .

[0026] In a preferred embodiment, a water inlet 6 and a water outlet 7 are provided on the side wall of the water tank 1 , the water inlet 6 is located at the upper part of the side wall of the water tank 1 , and the water outlet 7 is located at the lower part of the side wall of the water tank 1 .

[0027] In the preferred embodiment, a side baffle plate 8 is provided at one end of the top surface of the water tank 1, and an opening is provided on the side panel of the water tank 1 opposite to the side baffle plate 8, in which a sealing baffle plate 10 is installed. The side baffle plate 8, the sealing baffle plate 10 and the side walls of the water tank together form a rectangular cavity, and the output end of the water outlet straight pipe 402 extends into the rectangular cavity, and one end of the exhaust pipe 3 located in the water tank 1 passes through the side baffle plate 8 and also extends into the rectangular cavity.

[0028] In a preferred solution, a filter plate 9 is provided at the bottom of the rectangular cavity, and a filter net 901 is provided on the filter plate 9.

[0029] In a preferred solution, a sealing layer 11 is provided on the inner side of the sealing baffle 10, and the sealing layer 11 is sealed by interference fit with the opening on the side plate of the water tank 1;

[0030] An exhaust port 12 is provided on the outer side of the sealing baffle 10 , the exhaust port 12 is connected with the rectangular cavity and the external space of the water tank 1 , and an exhaust pipe 13 is installed on the exhaust port 12 .

[0031] The specific structure of the waste gas waste heat recovery device in the above-mentioned silicone production is as follows:

[0032] Construction of heat exchange chamber and water tank:

[0033] The heat exchange chamber 2 is made of stainless steel, with dimensions of 1.5m long, 1.2m wide and 2m high. The water tank 1 is placed below the heat exchange chamber, with dimensions of 1.5m long, 1.2m wide and 1m deep. The two are firmly connected by welding. The water tank is pre-filled with deionized water as a heat exchange medium.

[0034] Setting of exhaust pipe and circulating water pipe:

[0035] The exhaust pipe 3 is made of high temperature and corrosion resistant alloy material, with a diameter of 20 cm, arranged at the top of the heat exchange cavity in an "S" shape, with a total length of about 6 m, one end of which extends into the water tank and is located in the circulating water in the rectangular cavity. The circulating water pipe 4 is a copper coil with a diameter of 5 cm, which is laid around the spiral groove 301 formed on the outer wall of the exhaust pipe, and the total length of the coil is about 20 m to ensure sufficient heat exchange.

[0036] Circulating water system:

[0037] Both ends of the circulating water pipe 4 are connected to the water pump 5 arranged in the water tank 1 through the water inlet straight pipe 401. The power of the water pump is 3kW, which ensures that the circulating water circulates at an appropriate flow rate and pressure.

[0038] Filtration and sealing device:

[0039] A water inlet 6 is provided on the upper side wall of the water tank, and a water outlet 7 is provided on the lower side wall to facilitate water replenishment and discharge. A side baffle 8 is installed on the top of one end of the water tank, and an opening matching the side baffle is provided on the opposite side plate, and a sealing baffle 10 is installed, and a rubber sealing layer 11 is attached to the inner side of the sealing baffle to ensure sealing. An exhaust port 12 is installed on the outer side of the sealing baffle, connected to an exhaust pipe 13 to lead to the outside, and an anti-backflow valve is provided at the exhaust port to prevent the backflow of external air. In addition, a layer of stainless steel filter plate 9 is laid at the bottom of the water tank, which is covered with a fine filter mesh 901 to block impurities in the water.

[0040] In the above structure, the exhaust port 12 is set at a height higher than the output end of the exhaust pipe 3, and the circulating water level in the water tank 1 is ensured to be located between the exhaust port 12 and the output end of the exhaust pipe 3, ensuring that the exhaust gas after heat exchange can directly pass into the circulating water to achieve impurity adsorption.

[0041] A temperature sensor module is further added to the water tank 1 to monitor the temperature of the circulating water in real time. When the water temperature reaches the set value, the valve on the water outlet 7 can be opened and the hot water can be discharged through the remote electronic control, and then the water tank 1 can be replenished through the valve on the water inlet 6 through the remote electronic control.

Claims

1. A waste heat recovery device for waste gas in organosilicon production, characterized in that: It comprises a heat exchange chamber (2) and a water tank (1) located at the bottom of the heat exchange chamber (2), wherein an exhaust pipe (3) is provided at the top of the heat exchange chamber (2), the exhaust pipe (3) is arranged in an "S" shape in the heat exchange chamber (2) to form an exhaust gas flow channel, and one end of the exhaust pipe (3) extends downward into the water tank (1); A circulating water pipe (4) is wound around the exhaust pipe (3) in the heat exchange chamber (2); the circulating water pipe (4) is a coil structure; both ends of the circulating water pipe (4) extend into the water tank (1), and one end thereof is connected to a water supply pump (5) disposed in the water tank (1).

2. The waste heat recovery device for waste gas in the production of organic silicon according to claim 1, characterized in that: A spiral groove (301) is provided on the outer wall of the exhaust pipe (3), and the circulating water pipe (4) is arranged in the spiral groove (301).

3. The waste heat recovery device for waste gas in the production of organic silicon according to claim 1, characterized in that: A straight water inlet pipe (401) and a straight water outlet pipe (402) are respectively provided at both ends of the circulating water pipe (4); the straight water inlet pipe (401) is connected to a water pump (5); and the straight water outlet pipe (402) is arranged through the top wall of the water tank (1).

4. The waste heat recovery device for waste gas in the production of organic silicon according to claim 1, characterized in that: A water inlet (6) and a water outlet (7) are provided on the side wall of the water tank (1); the water inlet (6) is located at the upper part of the side wall of the water tank (1), and the water outlet (7) is located at the lower part of the side wall of the water tank (1).

5. The waste heat recovery device for waste gas in the production of organic silicon according to claim 3, characterized in that: A side baffle (8) is provided at one end of the top surface of the water tank (1); an opening is provided on the side plate of the water tank (1) opposite to the side baffle (8); a sealing baffle (10) is installed in the opening; the side baffle (8), the sealing baffle (10) and the side walls of the water tank together form a rectangular cavity; the output end of the water outlet straight pipe (402) extends into the rectangular cavity; and one end of the exhaust pipe (3) located in the water tank (1) passes through the side baffle (8) and also extends into the rectangular cavity.

6. The waste heat recovery device for waste gas in the production of organic silicon according to claim 5, characterized in that: A filter plate (9) is provided at the bottom of the rectangular cavity, and a filter screen (901) is provided on the filter plate (9).

7. The waste heat recovery device for waste gas in the production of organic silicon according to claim 5, characterized in that: A sealing layer (11) is provided on the inner side of the sealing baffle (10), and the sealing layer (11) is sealed by interference fit with the opening on the side plate of the water tank (1); An exhaust port (12) is provided on the outside of the sealing baffle (10), the exhaust port (12) is in communication with the rectangular cavity and the external space of the water tank (1), and an exhaust pipe (13) is installed on the exhaust port (12).

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