A device for the circular economy production process of 1,4-butanediol

Abstract

The invention discloses a device for the circular economy production process of 1,4-butanediol. The sewage generated by the 1,4-butanediol device is sent to the acetylene device and the water-coal slurry gasification device, and the missing part is supplemented by fresh water. The carbide slag generated by the acetylene device is sent to the carbide device to produce carbide after treatment, and the carbide is sent back to the acetylene device to form a cycle. A part of the synthesis gas generated by the water-coal slurry gasification device is sent to the 1,4-butanediol device for use after hydrogen extraction, and the tail gas and synthesis gas after hydrogen extraction are sent to the methanol device to produce methanol, and are sent to the BDO device to form a cycle after conversion by the formaldehyde device. The process of the present invention is reasonable, the discharge of wastewater and waste residue is small, and the competitiveness is strong.

Description

Technical Field

[0001] The invention relates to a 1,4-butanediol production process, in particular to equipment used in the 1,4-butanediol circular economy production process. Background Art

[0002] In November 2021, the Ministry of Ecology and Environment released the "Comprehensive List of Environmental Protection (2021 Edition)", aiming to fight the tough battle against pollution in depth, resolutely curb the blind development of "two high" projects, guide enterprises' green transformation, and promote high-quality development of the industry.

[0003] At present, the main domestic production method of 1,4-butanediol is the acetylene-aldehyde method. Due to its process characteristics, a large amount of sewage will be generated during the production process. The wastewater mainly comes from the distillation and deionization process, and the amount of wastewater generated per ton of product is about 4 tons. Its production raw material acetylene usually adopts the calcium carbide method. When producing acetylene, a large amount of calcium carbide slag will be produced. The amount of calcium carbide slag produced depends on the gas emission of calcium carbide. If the treatment problems of sewage and calcium carbide slag cannot be effectively solved, this process will be eliminated by the times. Summary of the invention

[0004] In order to solve the above technical problems, the purpose of the present invention is to provide a device for the circular economy production process of 1,4-butanediol. The production process of the device is reasonable, and the discharge of wastewater and waste residue is small, which solves the problem of large discharge of wastewater and waste residue in the existing BDO production technology and failure to meet policy requirements.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] A device for the circular economy production process of 1,4-butanediol, characterized in that it includes a 1,4-butanediol device, a water-coal slurry gasification device, an acetylene device, a calcium carbide device, a methanol device, a hydrogen extraction device, and a formaldehyde device; the sewage outlet of the 1,4-butanediol device is connected to the acetylene device and the water-coal slurry gasification device, and the acetylene device and the water-coal slurry gasification device are provided with a fresh water replenishment port; the acetylene produced by the acetylene device is sent to the 1,4-butanediol device, the calcium carbide slag produced is sent to the calcium carbide device, and the calcium carbide produced by the calcium carbide device is sent back to the acetylene device to produce acetylene; a part of the synthesis gas produced by the water-coal slurry gasification device is sent to the hydrogen extraction device, and the other part is sent to the methanol device; the hydrogen separated by the hydrogen extraction device is sent to the 1,4-butanediol device, and the tail gas is sent to the methanol device; the methanol produced by the methanol device is sent to the formaldehyde device; the formaldehyde produced by the formaldehyde device is sent to the 1,4-butanediol device.

[0007] Furthermore, the production of the 1,4-butanediol device is an acetylene aldehyde process.

[0008] Furthermore, the acetylene device is a calcium carbide acetylene device.

[0009] Furthermore, when the wastewater generated by the 1,4-butanediol device is used in a water-coal slurry gasification device, a dispersant needs to be added.

[0010] Furthermore, the hydrogen extraction device is usually a PSA device.

[0011] The beneficial effects of the present invention are: realizing the recycling of waste water and waste residue, forming a good circular economic system, that is, solving the problem of waste water and waste residue discharge, and reducing raw material consumption, which is in line with the concept of green development and has obvious competitive advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the present invention. DETAILED DESCRIPTION

[0013] The embodiments described below illustrate the present invention in detail, but the present invention is not limited to the following embodiments. The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more specific definition of the protection scope of the present invention.

[0014] A device for the circular economy production process of 1,4-butanediol, comprising a 1,4-butanediol device, a water-coal slurry gasification device, an acetylene device, a calcium carbide device, a methanol device, a hydrogen extraction device, and a formaldehyde device. The sewage of the 1,4-butanediol device is sent to the acetylene device and the water-coal slurry gasification device, and the insufficient part is supplemented by fresh water; the acetylene produced by the acetylene device is sent to the 1,4-butanediol device, the calcium carbide slag produced is sent to the calcium carbide device, and the produced calcium carbide is continuously sent back to the acetylene device to produce acetylene; part of the synthesis gas produced by the water-coal slurry gasification device is sent to the hydrogen extraction device, and the other part is sent to the methanol device; the hydrogen separated by the hydrogen extraction device is sent to the 1,4-butanediol device, and the tail gas is sent to the methanol device; the methanol produced by the methanol device is sent to the formaldehyde device; the formaldehyde produced by the formaldehyde device is sent to the 1,4-butanediol device.

[0015] Among them, the 1,4-butanediol unit adopts the acetylene aldehyde method for production; the acetylene unit is an acetylene unit using the calcium carbide method. The wastewater generated by the 1,4-butanediol unit needs to be added with a dispersant when used in the water-coal slurry gasification unit. The hydrogen extraction unit is usually a PSA unit.

[0016] The present invention realizes the recycling of waste water and waste residue, forms a good circular economic system, greatly reduces the discharge of waste water and waste residue, and reduces the consumption of raw materials. It conforms to the concept of green development and has obvious competitive advantages.

[0017] It should be emphasized that the above description is only an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent method or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A device for the circular economy production process of 1,4-butanediol, characterized in that: It includes a 1,4-butanediol device, a water-coal slurry gasification device, an acetylene device, a calcium carbide device, a methanol device, a hydrogen extraction device, and a formaldehyde device; the sewage outlet of the 1,4-butanediol device is connected to the acetylene device and the water-coal slurry gasification device, and the acetylene device and the water-coal slurry gasification device are provided with fresh water replenishment ports; the acetylene produced by the acetylene device is sent to the 1,4-butanediol device, the calcium carbide slag produced is sent to the calcium carbide device, and the calcium carbide produced by the calcium carbide device is sent back to the acetylene device to produce acetylene; part of the synthesis gas produced by the water-coal slurry gasification device is sent to the hydrogen extraction device, and the other part is sent to the methanol device; the hydrogen separated by the hydrogen extraction device is sent to the 1,4-butanediol device, and the tail gas is sent to the methanol device; the methanol produced by the methanol device is sent to the formaldehyde device; the formaldehyde produced by the formaldehyde device is sent to the 1,4-butanediol device.

2. The equipment for the circular economy production process of 1,4-butanediol according to claim 1, characterized in that: The production of the 1,4-butanediol device adopts the acetylene aldehyde method.

3. The equipment for the circular economy production process of 1,4-butanediol according to claim 1, characterized in that: The acetylene device is a calcium carbide acetylene device.

4. The equipment for the circular economy production process of 1,4-butanediol according to claim 1, characterized in that: A dispersant is provided in the water-coal slurry gasification device.

5. The equipment for the circular economy production process of 1,4-butanediol according to claim 1, characterized in that: The hydrogen extraction device is a PSA device.

Images