A new energy-saving heat recovery system

Abstract

This utility model discloses a new energy-saving heat recovery system, belonging to the field of heat recovery technology. It includes a tower, and a regeneration component comprising two sets of symmetrically arranged top plate heat exchangers and two sets of separation towers connected within the tower. A gas phase pipeline connects the top plate heat exchangers and the circulating tower. A compressor compresses and heats the water vapor generated by the top plate heat exchangers and separation towers, introducing the top gas phase into the top plate heat exchangers. The circulating tower's top gas phase heats the water in the heat exchangers to boiling. Forced circulation occurs between the top plate heat exchangers and the separation towers via a circulating pump, generating water vapor that absorbs the latent heat of vaporization from the circulating tower's top gas phase. After releasing its latent heat of vaporization, the circulating tower's top gas phase condenses into a liquid state at a high temperature of 138°C. The water vapor generated by the top plate heat exchangers and separation towers is then introduced into the compressor. Through the cooperation of the compressor and the top condensate preheater, the water vapor is compressed to a pressure of 1000 kPa and a temperature of 175.38°C, supplying the reboiler.

Description

Technical Field

[0001] This utility model relates to the field of energy-saving heat recovery technology, specifically a new energy-saving heat recovery system. Background Technology

[0002] Formaldehyde circulation towers are mainly used to treat formaldehyde waste gas. They have the advantages of high efficiency purification, energy saving and environmental protection, recyclability and safety and reliability. They are widely used in the treatment of formaldehyde waste gas in industries such as chemical, pharmaceutical, paint and rubber. The main function of the formaldehyde circulation tower is to treat waste gas. The formaldehyde circulation tower uses a spray absorption method and a packing layer to increase the contact area between the waste gas and the absorption liquid, effectively removing formaldehyde from the waste gas and converting it into harmless substances, thereby purifying the air.

[0003] In the original process, the high-heat gaseous material at the top of the formaldehyde circulation tower (temperature 145℃) is directly cooled by a contact condenser, and its high heat is carried away by the circulating cooling water. The high heat loss results in a significant loss of economic benefits. Therefore, there is an urgent need to provide a new energy-saving heat recovery system. Utility Model Content

[0004] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be used to limit the scope of this utility model.

[0005] Therefore, the purpose of this utility model is to provide a new energy-saving heat recovery system. The system introduces the top gas phase of the circulating tower into a top plate heat exchanger, using this top gas phase to heat the water in the heat exchanger to boiling. Forced circulation occurs between the top plate heat exchanger and the separator via a circulating pump, generating water vapor that absorbs the latent heat of vaporization from the top gas phase. After releasing its latent heat, the top gas phase condenses into a liquid state at a high temperature of 138°C. The water vapor generated by the top plate heat exchanger and the separator, being lower than the bottom temperature, is introduced into a compressor. Through the cooperation of the compressor and the top condensate preheater, the water vapor is compressed to a pressure of 1000 kPa and a temperature of 175.38°C, which is then supplied to the reboiler. To solve the above technical problems, according to one aspect of this utility model, the following technical solution is provided:

[0006] A new energy-saving heat recovery system includes:

[0007] As a connecting base, the tower is equipped with a circulation tower, and gas phase pipeline one and gas phase pipeline two are respectively connected to the outside of the circulation tower.

[0008] The recycling component is connected to the tower and includes two sets of top plate heat exchangers arranged symmetrically on the left and right, and two sets of separation towers connected to the tower. The gas phase pipeline connects the top plate heat exchangers and the circulation tower, and a circulation pump is connected to the tower.

[0009] The compressor, connected to the tower, compresses and heats the water vapor generated by the plate heat exchanger at the top of the tower and the separation tower.

[0010] As a preferred embodiment of the new energy-saving heat recovery system described in this utility model, the top plate heat exchanger is provided in a one-to-one correspondence with the separation tower, and the two sets of separation towers are connected to the circulating pump through a gas phase pipeline, and the gas phase outlet of the separation tower is connected to a connecting pipe.

[0011] As a preferred embodiment of the new energy-saving heat recovery system described in this utility model, the other end of the connecting pipe is connected to the condensate preheater at the top of the tower, the condensate preheater at the top of the tower is installed inside the tower, and the output port of the condensate preheater at the top of the tower is correspondingly set with the compressor.

[0012] As a preferred embodiment of the new energy-saving heat recovery system described in this utility model, the compressor includes a compressor connected to the bottom of the tower, the compressor input port is connected to the output port of the condensate preheater at the top of the tower, the compressor output port is connected to a second pipe, and the other end of the second pipe is connected to a reboiler.

[0013] As a preferred embodiment of the new energy-saving heat recovery system described in this utility model, the tower top plate heat exchanger is a fully welded plate heat exchanger, which consists of multiple sets of metal waveguides, rubber gaskets, fixed clamping plates, movable clamping plates, upper and lower guide rods and clamping screws. The heat exchanger plates are made of titanium and stainless steel composite plates, and the double sealing of rubber gaskets and welding process ensures corrosion resistance and long-term sealing performance.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] The overhead vapor phase is introduced into the overhead plate heat exchanger, which heats the water in the heat exchanger to boiling. The overhead plate heat exchanger and the separator are forcibly circulated by a circulating pump, generating water vapor that absorbs the latent heat of vaporization from the overhead vapor phase. After releasing the latent heat of vaporization, the overhead vapor phase condenses into a liquid at a high temperature of 138°C. The water vapor generated by the overhead plate heat exchanger and the separator, since its temperature is lower than that of the bottom of the column, is introduced into the compressor. Through the cooperation of the compressor and the overhead condensate preheater, the water vapor is compressed to a pressure of 1000 kPaA and a temperature of 175.38°C, and then supplied to the reboiler. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of part of the structure of this utility model;

[0019] In the diagram: 100 Tower, 110 Formaldehyde Circulation Tower Gas, 111 Circulation Liquid Pipeline 1, 112 Circulation Pipeline 2, 200 Recycling Component, 210 Tower Top Plate Heat Exchanger, 220 Separation Tower, 221 Compressor Inlet Bypass, 230 Tower Top Condensate Preheater, 240 Circulation Pump, 300 Compressor, 310 Compressor Second Stage Inlet, 311 Compressor First Stage Outlet, 320 Compressor Main Motor. Detailed Implementation

[0020] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0021] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0022] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views showing the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, in actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0024] This utility model provides a new energy-saving heat recovery system. Please refer to [link / reference]. Figure 1-2 It includes a tower 100, a recycling assembly 200, a top plate heat exchanger 210, a separation tower 220, a top condensate preheater 230, and a compressor 300.

[0025] Please continue reading. Figure 1-2 The tower 100 serves as the connecting base frame, and a tower top plate heat exchanger 210 is installed on the tower 100. The outer side of the tower top plate heat exchanger 210 is respectively connected to a circulating liquid pipeline 111 and a gas phase pipeline 112.

[0026] Please continue reading. Figure 1-2 The recycling component 200 is threadedly connected to the tower 100, including two sets of top plate heat exchangers 210 arranged symmetrically on the left and right, and two sets of separation towers 220 screwed into the tower 100. The gas phase pipeline 212 is connected to the top condensate preheater 230, and the tower 100 is threadedly connected to the circulating pump 240.

[0027] The other end of the compressor inlet bypass 221 is connected to the separation tower 220. The condensate preheater 230 at the top of the tower is screwed into the tower frame 100. The output port of the separation tower 220 at the top of the tower is set to correspond with the compressor 300.

[0028] Please continue reading. Figure 1-2 The compressor 300 is connected to the tower 100, and the water vapor generated by the top plate heat exchanger 210 and the separation tower 220 is compressed and heated.

[0029] The compressor 300 includes a compressor 310 connected to the bottom of the tower 100. The input port of the compressor 310 is connected to the output port of the separation tower 220. One end of the pipe 311 is connected to the first-stage output port of the compressor 310, and the other end is connected to the second-stage inlet of the compressor 310. The second-stage outlet of the compressor 310 is connected to the reboiler (E8106) of the original system via a pipe 321. The reboiler (E8106) is correspondingly set with the circulating tower 110.

[0030] The tower-top plate heat exchanger 210 consists of multiple sets of metal plates, rubber gaskets, fixed clamping plates, movable clamping plates, upper and lower guide rods, and clamping screws. The heat exchanger plates are made of titanium and stainless steel composite plates, combined with a double seal achieved through rubber gaskets and welding, ensuring corrosion resistance and long-term sealing. The plates have four corner holes for the passage of the two heat transfer media. The metal plates are installed within a frame containing fixed and movable clamping plates and are secured with clamping bolts. Sealing gaskets on the plates seal the two fluid channels, guiding the fluids to flow alternately into their respective channels for heat exchange. Each medium has one inlet and one outlet.

[0031] Working principle: In use, the gas phase from the top of the tower is introduced into the top plate heat exchanger 210. The gas phase from the top of the circulating tower 110 heats the water in the heat exchanger to boiling. The top plate heat exchanger 210 and the separator 220 are forcibly circulated by the circulating pump 240, generating water vapor. This water vapor absorbs the latent heat of vaporization of the gas phase from the top of the circulating tower 110. After releasing the latent heat of vaporization, the gas phase from the top of the circulating tower 110 condenses into a liquid state at a high temperature of 138°C. The water vapor generated by the top plate heat exchanger 210 and the separator 220, since its temperature is lower than the bottom temperature of the tower, is introduced into the compressor 310. Through the cooperation of the compressor 310, the top plate heat exchanger 210, and the separator 220, the water vapor is compressed to a pressure of 1000 kPa and a temperature of 175.38°C, which is then supplied to the reboiler (E8106).

[0032] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A novel energy-saving heat recovery system, characterized in that, include: The tower (100) serves as the connecting base frame. The circulating tower gas (110) from the V8107 formaldehyde circulating tower enters the top plate heat exchanger (210). The outside of the top plate heat exchanger (210) is connected to the circulating liquid pipeline one (111) and the gas phase pipeline two (112). The recycling assembly (200) is connected to the tower (100) and includes two sets of tower top plate heat exchangers (210) arranged symmetrically on the left and right, and two sets of separation towers (220) connected to the tower (100). The gas phase pipeline (112) is connected to the tower top plate heat exchangers (210), and a circulation pump (240) is connected to the tower (100). The compressor (300) is connected to the tower (100) to compress and heat the water vapor generated by the plate heat exchanger (210) at the top of the tower and the separation tower (220).

2. The novel energy-saving heat recovery system according to claim 1, characterized in that, The two sets of tower top plate heat exchangers (210) are set one-to-one with the separation tower (220), and the two sets of separation towers (220) are connected to the circulating pump (240) through a circulating liquid pipeline (111). The gas phase outlet of the separation tower (220) is connected to the compressor inlet (311).

3. The novel energy-saving heat recovery system according to claim 2, characterized in that, The separation tower (220) is connected to a compressor inlet bypass (221), and the other end of the compressor inlet bypass (221) is connected to the condensate preheater (230) at the top of the tower. The condensate preheater (230) at the top of the tower is installed inside the tower frame (100), and the output port of the condensate preheater (230) at the top of the tower is correspondingly set to the compressor (300).

4. A novel energy-saving heat recovery system according to claim 2, characterized in that, The compressor (300) includes a compressor (310) connected to the bottom of the tower (100), the compressor second-stage inlet (310) is connected to the output port of the separation tower (220), and the compressor first-stage outlet (311) is connected to the compressor second-stage inlet (310).

5. A novel energy-saving heat recovery system according to claim 4, characterized in that, The tower top plate heat exchanger (210) is a fully welded plate heat exchanger, consisting of multiple sets of metal waveguides, rubber gaskets, fixed clamping plates, movable clamping plates, upper and lower guide rods, and clamping screws.

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