Polyurethane resin production device with condensing function

Abstract

The utility model relates to a polyurethane resin production device with condensation function belongs to polyurethane resin production technical field. This polyurethane resin production device with condensation function, include: reaction kettle, the upper end of reaction kettle is installed with stirring motor, condensing mechanism, the surface of condensing mechanism is installed in the surface of reaction kettle, the surface extension of condensing mechanism reaches the inside of reaction kettle, wherein, the condensing mechanism includes the connecting pipeline fixedly connected in the surface of reaction kettle, the isocyanate volatile in the inside of reaction kettle is assisted condensation, through the injection pipe and inject low temperature liquid in the inside pipe, liquid injects the inside of cooling metal pipe through the upper end of inside pipe, the surface of cooling metal pipe and multiple temperature -sensing metal strip contact, the airflow forms good condensation effect when passing through the air hole, reduces isocyanate volatile condition, improves the use efficiency of raw material, reduces production cost.

Description

Technical Field

[0001] This utility model relates to the field of polyurethane resin production technology, and in particular to a polyurethane resin production apparatus with a condensation function. Background Technology

[0002] The core function of polyurethane resin production equipment is to synthesize polymer materials through the chemical reaction of isocyanate and polyol. During production, isocyanate needs to be strictly dehydrated, and polyol needs to be preheated to 40-60℃ to reduce the reaction viscosity. A search of existing Chinese patent technology reveals a "stirring device for polyurethane resin production" with publication number "CN222309378U". This device can scrape off polyurethane resin raw materials adhering to the inner wall of the mixing tank and the front and rear ends of the stirring blades and scraper, thereby further improving the utilization rate of raw materials. However, during the mixing process, unreacted isocyanates are easily volatilized, leading to waste of raw materials and increased production costs. Utility Model Content

[0003] Therefore, it is necessary to provide a polyurethane resin production device with condensation function to address the problem that unreacted isocyanates are volatile during the mixing process, leading to raw material waste and increased production costs.

[0004] A polyurethane resin production apparatus with condensation function is provided, comprising: a reactor, wherein a stirring motor is installed at the upper end of the reactor; and a condensation mechanism, wherein the condensation mechanism is installed on the surface of the reactor and the surface of the condensation mechanism extends into the interior of the reactor; wherein the condensation mechanism includes a connecting pipe fixedly connected to the surface of the reactor, the end of the connecting pipe extending into the interior of the reactor, an external condensation component is installed on the surface of the connecting pipe, an internal condensation component is installed inside the connecting pipe, and the surface of the internal condensation component extends to the outside of the connecting pipe.

[0005] In one embodiment, the internal condensation assembly includes an internal fixed tube fixedly connected to the inner wall of the connecting pipe. The inner wall of the internal fixed tube has multiple internal grooves. A heat-conducting metal strip is fixedly connected to the inner wall of the internal groove. A vent hole is provided at the upper end of the heat-conducting metal strip. A cooling metal pipe is fixedly connected to the inner wall of the heat-conducting metal strip.

[0006] In one embodiment, the external condensation assembly includes a plurality of temperature-conducting blocks fixedly connected to the surface of the connecting pipe. The surface of the temperature-conducting blocks away from the connecting pipe is fixedly connected to a locking block. A heat pipe is embedded in the upper end of the temperature-conducting blocks. The heat pipe is spiral in shape. Fastening rings are fitted on the surface of the plurality of temperature-conducting blocks.

[0007] In one embodiment, a plurality of the internal grooves are evenly distributed in a ring shape along the inner wall of the internal fixed tube, and the internal grooves are spiral-shaped.

[0008] In one embodiment, the cooling metal tube has an internal outlet tube, the other end of which extends to the outside of the connecting pipe.

[0009] In one embodiment, an inner tube is fixedly connected to the inner bottom wall of the cooling metal tube, and an injection tube is connected to the inner wall of the inner tube.

[0010] In one embodiment, the heat pipe is fitted with an outer sleeve, and the inner wall of the outer sleeve is fixedly connected with a plurality of metal fins.

[0011] In one embodiment, the metal fins are fixedly connected to the surface of the connecting pipe, and a plurality of the metal fins are distributed in a ring shape along the inner wall of the outer sleeve. Beneficial effects

[0012] 1. The polyurethane resin production device with condensation function described above can assist in the condensation of volatile isocyanate inside the reactor by setting an internal condensation component. Low-temperature liquid is injected into the internal tube through the injection pipe. The liquid is injected into the interior of the cooling metal tube through the upper end of the internal tube. The surface of the cooling metal tube is in contact with multiple heat-conducting metal strips. When the airflow passes through the vent, a good condensation effect is formed, which reduces the volatilization of isocyanate, improves the utilization efficiency of raw materials, and reduces production costs. 2. By setting up an external condensation component, multiple metal fins and an external sleeve can form a relatively narrow space under the action of the external condensation component. When heat is generated on the surface of the connecting pipe, the heat pipe provides auxiliary cooling, and the heat-conducting block also cools the connecting pipe in this area. This allows the gas inside the connecting pipe to be initially cooled, improving the gas condensation effect, reducing isocyanate volatilization, increasing the efficiency of raw material use, and reducing production costs. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the condensation mechanism of this utility model; Figure 3 This is a partial structural diagram of the external condensation component of this utility model; Figure 4 This is a schematic diagram of the internal condensation component structure of this utility model; Figure 5 This is a partial structural diagram of the internal condensation component of this utility model after an explosion.

[0015] Figure label: 1. Reactor; 2. Stirring motor; 3. Condensation mechanism; 31. External condensation assembly; 311. Temperature-conducting block; 312. Heat pipe; 313. Clamping block; 314. Metal fins; 315. External sleeve; 316. Fastening ring; 32. Internal condensation assembly; 321. Internal fixing tube; 322. Internal groove; 323. Temperature-conducting metal strip; 324. Vent hole; 325. Cooling metal tube; 326. Internal tube; 327. Injection tube; 328. Outlet tube; 33. Connecting pipe. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0017] The following is combined Figures 1-5 This invention describes a polyurethane resin production apparatus with a condensation function.

[0018] In one embodiment, a polyurethane resin production apparatus with condensation function includes: a reactor 1, with a stirring motor 2 installed at the upper end of the reactor 1; and a condensation mechanism 3, which is installed on the surface of the reactor 1 and extends into the interior of the reactor 1. The condensation mechanism 3 includes a connecting pipe 33 fixedly connected to the surface of the reactor 1, with the end of the connecting pipe 33 penetrating into the interior of the reactor 1. An external condensation component 31 is installed on the surface of the connecting pipe 33, and an internal condensation component 32 is installed inside the connecting pipe 33, with the surface of the internal condensation component 32 extending to the outside of the connecting pipe 33. It should be noted that: the polyurethane resin reactor 1 is the core equipment for polyurethane production. Its process design, temperature control system, and stirring technology directly affect product quality and efficiency. Isocyanates MDI / TDI and polyols must be precisely measured according to the NCO / OH molar ratio. Prepolymer synthesis requires reaction at 80-120℃. Foaming agents, such as water or physical foaming agents, and catalysts, such as amines / organotin compounds, need to be premixed. During the molding stage, the injection speed and pressure must be controlled to avoid uneven mixing in certain areas. like Figure 2 , Figure 4 and Figure 5 As shown, the internal condensation assembly 32 includes an internal fixed tube 321 fixedly connected to the inner wall of the connecting pipe 33. The inner wall of the internal fixed tube 321 is provided with multiple internal grooves 322. A heat-conducting metal strip 323 is fixedly connected to the inner wall of the internal groove 322. A vent hole 324 is provided at the upper end of the heat-conducting metal strip 323. A cooling metal tube 325 is fixedly connected to the inner wall of the heat-conducting metal strip 323. The multiple internal grooves 322 are evenly distributed in a ring shape along the inner wall of the internal fixed tube 321. The internal grooves 322 are spiral. An outlet pipe 328 is connected to the inside of the cooling metal tube 325. The other end of the outlet pipe 328 extends to the outside of the connecting pipe 33. An internal tube 326 is fixedly connected to the inner bottom wall of the cooling metal tube 325. An injection pipe 327 is connected to the inner wall of the internal tube 326. In this embodiment, during use, the device injects cryogenic liquid into the inner tube 326 through the injection tube 327, allowing the liquid to enter the interior of the cooling metal tube 325 through the upper end of the inner tube 326. The cryogenic liquid flows along the inner wall of the cooling metal tube 325 from top to bottom and exits through the outlet tube 328. The surface of the cooling metal tube 325 contacts multiple heat-conducting metal strips 323, causing the relative temperature of the heat-conducting metal strips 323 to decrease. When the airflow passes through the vent 324, a better condensation effect is formed. The multiple internal grooves 322 on the inner wall of the inner fixed tube 321 increase the contact area of ​​the heat-conducting metal strips 323, and the spiral shape of the heat-conducting metal strips 323 extends the path of the airflow through the vent 324, resulting in a better condensation effect. like Figure 1 , Figure 2 and Figure 3 As shown, the external condensation assembly 31 includes multiple temperature-conducting blocks 311 fixedly connected to the surface of the connecting pipe 33. A retaining block 313 is fixedly connected to the surface of the temperature-conducting block 311 away from the connecting pipe 33. A heat pipe 312 is embedded in the upper end of the temperature-conducting block 311. The heat pipe 312 is spiral in shape. A fastening ring 316 is sleeved on the surface of the multiple temperature-conducting blocks 311. An external sleeve 315 is sleeved on the outside of the heat pipe 312. Multiple metal fins 314 are fixedly connected to the inner wall of the external sleeve 315. The metal fins 314 are fixedly connected to the surface of the connecting pipe 33. The multiple metal fins 314 are distributed in a ring shape along the inner wall of the external sleeve 315. In this embodiment, when the device is in use, multiple metal fins 314 and an outer sleeve 315 form a relatively narrow space, allowing gas to flow rapidly on the surface of the connecting pipe 33 in this area. The narrow longitudinal direction causes the hot air mass to move upward when heat is generated on the surface of the connecting pipe 33, allowing the low-temperature air mass to enter the interior of the outer sleeve 315 from the lower end of the gap between adjacent metal fins 314. The heat pipe 312 provides auxiliary cooling, and the heat-conducting block 311 further cools the connecting pipe 33 in this area, resulting in an initial cooling effect on the gas inside the connecting pipe 33 and improving the gas condensation effect.

[0019] Working principle: The connecting pipe 33 is connected to the inside of the reactor 1. The isocyanate inside the reactor 1 is heated and volatilizes and moves into the inside of the connecting pipe 33. Under the action of the heat-conducting block 311, the surface of the adjacent connecting pipe 33 is cooled. The lower end of the gap between the adjacent metal fins 314 enters the inside of the outer sleeve 315 and is assisted in cooling through the heat pipe 312. The injection pipe 327 injects the low temperature liquid into the inner tube 326. The liquid is injected into the inside of the cooling metal tube 325 through the upper end of the inner tube 326. The surface of the cooling metal tube 325 is in contact with multiple heat-conducting metal strips 323. When the airflow passes through the vent 324, a good condensation effect is formed.

[0020] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A polyurethane resin production apparatus with a condensation function, characterized in that, include: A reaction vessel (1) is equipped with a stirring motor (2) at the upper end of the reaction vessel (1). A condensation mechanism (3) is mounted on the surface of the reactor (1) and the surface of the condensation mechanism (3) extends into the interior of the reactor (1); The condensation mechanism (3) includes a connecting pipe (33) fixedly connected to the surface of the reactor (1). The end of the connecting pipe (33) extends into the interior of the reactor (1). An external condensation component (31) is installed on the surface of the connecting pipe (33). An internal condensation component (32) is installed inside the connecting pipe (33). The surface of the internal condensation component (32) extends to the outside of the connecting pipe (33).

2. The polyurethane resin production apparatus with condensation function according to claim 1, characterized in that, The internal condensation assembly (32) includes an internal fixed tube (321) fixedly connected to the inner wall of the connecting pipe (33). The inner wall of the internal fixed tube (321) is provided with a plurality of internal grooves (322). A heat-conducting metal strip (323) is fixedly connected to the inner wall of the internal groove (322). A vent hole (324) is provided at the upper end of the heat-conducting metal strip (323). A cooling metal tube (325) is fixedly connected to the inner wall of the heat-conducting metal strip (323).

3. The polyurethane resin production apparatus with condensation function according to claim 1, characterized in that, The external condensation assembly (31) includes multiple temperature-conducting blocks (311) fixedly connected to the surface of the connecting pipe (33). The surface of the temperature-conducting block (311) away from the connecting pipe (33) is fixedly connected with a clamping block (313). A heat pipe (312) is embedded in the upper end of the temperature-conducting block (311). The heat pipe (312) is spiral in shape. Fastening rings (316) are fitted on the surface of the multiple temperature-conducting blocks (311).

4. The polyurethane resin production apparatus with condensation function according to claim 2, characterized in that, The internal grooves (322) are evenly distributed in a ring shape along the inner wall of the internal fixed tube (321), and the internal grooves (322) are spiral.

5. The polyurethane resin production apparatus with condensation function according to claim 2, characterized in that, The cooling metal tube (325) has an internal connecting tube (328), and the other end of the connecting tube (328) extends to the outside of the connecting pipe (33).

6. The polyurethane resin production apparatus with condensation function according to claim 2, characterized in that, The inner bottom wall of the cooling metal tube (325) is fixedly connected to an inner tube (326), and the inner wall of the inner tube (326) is connected to an injection tube (327).

7. The polyurethane resin production apparatus with condensation function according to claim 3, characterized in that, The heat pipe (312) is fitted with an outer sleeve (315), and a plurality of metal fins (314) are fixedly connected to the inner wall of the outer sleeve (315).

8. The polyurethane resin production apparatus with condensation function according to claim 7, characterized in that, The metal fins (314) are fixedly connected to the surface of the connecting pipe (33), and a plurality of the metal fins (314) are distributed in a ring shape along the inner wall of the outer sleeve (315).

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