Concentration device for dilute sulfuric acid

Abstract

The concentration device comprises a sulfuric acid concentration kettle provided with a heating jacket, and the top of the sulfuric acid concentration kettle is connected with a dilute sulfuric acid feeding pipeline; wherein a sulfuric acid return pipeline is arranged between the bottom and the top of the sulfuric acid concentration kettle; the return pipeline is provided with a concentrated sulfuric acid collection branch pipeline and is used for collecting concentrated sulfuric acid; a water vapor outlet is formed in the top of the sulfuric acid concentration kettle; the dilute sulphuric acid concentration device achieves the efficient concentration effect on dilute sulphuric acid, and is simple in structure, low in implementation cost and simple and reliable in operation process.

Description

Technical Field

[0001] The utility model belongs to the field of waste sulfuric acid treatment devices, and in particular relates to a dilute sulfuric acid concentration device. Background Art

[0002] In the treatment of waste sulfuric acid (containing sodium bisulfate), after the sodium bisulfate is removed, the remaining sulfuric acid concentration is typically around 40% (containing a significant amount of water), making it difficult to directly use as industrial-grade sulfuric acid (which typically requires a concentration of over 90%). The existing equipment used to concentrate dilute sulfuric acid is overly complex and expensive.

[0003] Therefore, the present applicant hopes to develop a special concentration device for dilute sulfuric acid to solve the above technical problems. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a dilute sulfuric acid concentration device, which achieves efficient concentration of dilute sulfuric acid, has a simple structure, low implementation cost, and a simple and reliable operation process.

[0005] The technical solutions adopted in this utility model are as follows:

[0006] A dilute sulfuric acid concentration device comprises a sulfuric acid concentration kettle provided with a heating jacket, wherein the top of the sulfuric acid concentration kettle is connected to a dilute sulfuric acid feed pipeline;

[0007] A sulfuric acid reflux pipeline is provided between the bottom and the top of the sulfuric acid concentration kettle;

[0008] The reflux pipeline is provided with a concentrated sulfuric acid collection branch pipeline for collecting concentrated sulfuric acid;

[0009] A water vapor outlet is provided on the top of the sulfuric acid concentration kettle.

[0010] Preferably, the water vapor outlet is connected to a condenser, and the outlet of the condenser is connected to an evaporative condenser waste water tank.

[0011] Preferably, a wastewater pump is connected to the bottom of the evaporative condenser wastewater tank.

[0012] Preferably, the inlet of the wastewater pump is connected to the bottom outlet of the wastewater tank of the evaporative condenser through a pipeline, and the outlet of the wastewater pump serves as a drain outlet connected to the outside.

[0013] Preferably, the wastewater pump is further provided with a gas phase outlet, and the gas phase outlet is connected to the top of the evaporative condenser wastewater tank.

[0014] Preferably, a vacuum pump is connected to the top of the evaporative condenser wastewater tank; wherein the inlet of the vacuum pump is connected to the top outlet of the evaporative condenser wastewater tank through a negative pressure pipeline.

[0015] Preferably, a circulating water inlet is provided on one side of the lower end of the heating jacket, and a circulating water outlet is provided on the other side of the upper end thereof; and the heating jacket is also provided with a plurality of steam delivery pipelines.

[0016] Preferably, a reflux pump is installed on the reflux pipeline.

[0017] Preferably, each pipeline in the concentration device is provided with one or more switch valves.

[0018] The present application proposes a dilute sulfuric acid concentration device mainly composed of a sulfuric acid concentration kettle and a sulfuric acid reflux pipeline. Through this simple structure, efficient concentration of dilute sulfuric acid is achieved, and the implementation cost is low, and the operation process is simple and reliable. The present application also preferably proposes an efficient treatment structure for the water vapor outlet (a wastewater pump is provided at the bottom and a vacuum pump is provided at the top), which further reliably improves the concentration efficiency of dilute sulfuric acid. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a dilute sulfuric acid concentration device according to a specific embodiment of the present application. DETAILED DESCRIPTION

[0020] This embodiment provides a dilute sulfuric acid concentration device, comprising a sulfuric acid concentration kettle provided with a heating jacket, the top of which is connected to a dilute sulfuric acid feed pipeline; a sulfuric acid reflux pipeline is provided between the bottom and top of the sulfuric acid concentration kettle; the reflux pipeline is provided with a concentrated sulfuric acid collection branch pipeline for collecting concentrated sulfuric acid; and a water vapor outlet is provided at the top of the sulfuric acid concentration kettle.

[0021] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the following will be combined with the drawings of the embodiments of the present invention to clearly and completely describe the technical solutions of the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0022] See Figure 1 As shown, a dilute sulfuric acid concentration device includes a sulfuric acid concentration kettle 1 provided with a heating jacket 1a, the top of the sulfuric acid concentration kettle 1 is connected to a dilute sulfuric acid feed pipeline 1b; wherein, a sulfuric acid reflux pipeline 1c is provided between the bottom and the top of the sulfuric acid concentration kettle 1, and preferably, a reflux pump 2 is installed on the reflux pipeline 1c;

[0023] Preferably, in this embodiment, the reflux pipeline 1c is provided with a concentrated sulfuric acid collection branch pipeline 1c1 for collecting concentrated sulfuric acid; and a water vapor outlet 3 is provided at the top of the sulfuric acid concentration kettle 1.

[0024] In order to improve the concentration efficiency of dilute sulfuric acid, this embodiment further preferably proposes the following efficient treatment structure of the water vapor outlet 3 (a wastewater pump is provided at the bottom and a vacuum pump is provided at the top):

[0025] Preferably, in this embodiment, the water vapor outlet 3 is connected to the condenser 4, and the outlet of the condenser 4 is connected to the evaporative condenser wastewater tank 5; further preferably, a wastewater pump 6 is connected to the bottom of the evaporative condenser wastewater tank 5; wherein the inlet 6a of the wastewater pump 6 is connected to the bottom outlet 5a of the evaporative condenser wastewater tank 5 through a pipeline, and the outlet 6b of the wastewater pump 6 serves as a drain connected to the outside; the wastewater pump 6 is also provided with a gas phase outlet 6c, and the gas phase outlet 6c is connected to the top of the evaporative condenser wastewater tank 5;

[0026] Preferably, in this embodiment, a vacuum pump 7 is connected to the top of the evaporative condenser wastewater tank 5; wherein the inlet 7a of the vacuum pump 7 is connected to the top outlet 5a of the evaporative condenser wastewater tank 5 through a negative pressure pipeline 7b.

[0027] Preferably, in this embodiment, a circulating water inlet 8a is provided on one side of the lower end of the heating jacket 1a, and a circulating water outlet 8b is provided on the other side of the upper end thereof; and the heating jacket 1a is also provided with a plurality of steam delivery pipelines 8c.

[0028] It should be noted that in order to achieve flexible control connection effects of each pipeline, in this embodiment, each pipeline in the concentration device is provided with one or more switch valves 9, and each switch valve 9 is electrically connected to the control module to achieve automatic control. These are conventional technical means of those skilled in the art, so each embodiment will not be described in detail.

[0029] This embodiment proposes a dilute sulfuric acid concentration device mainly composed of a sulfuric acid concentration kettle 1 and a sulfuric acid reflux pipeline 1c. Through this simple structure, an efficient concentration effect of dilute sulfuric acid is achieved, and the operation process is simple and reliable. This embodiment also particularly preferably proposes an efficient treatment structure for the water vapor outlet 3 (a wastewater pump 6 is provided at the bottom, and a vacuum pump 7 is provided at the top), which further reliably improves the concentration efficiency of dilute sulfuric acid.

[0030] The applicant uses the dilute sulfuric acid concentration device provided in this embodiment to concentrate dilute sulfuric acid with a concentration of 40%. After testing, the concentration of the sulfuric acid obtained after treatment reaches 92.5%, reaching the index of industrial-grade sulfuric acid.

[0031] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0032] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A device for concentrating dilute sulfuric acid, characterized in that: It comprises a sulfuric acid concentration kettle provided with a heating jacket, the top of which is connected to a dilute sulfuric acid feed pipeline; wherein, A sulfuric acid reflux pipeline is provided between the bottom and the top of the sulfuric acid concentration kettle; The reflux pipeline is provided with a concentrated sulfuric acid collection branch pipeline for collecting concentrated sulfuric acid; A water vapor outlet is provided on the top of the sulfuric acid concentration kettle.

2. The dilute sulfuric acid concentration device according to claim 1, characterized in that: The water vapor outlet is connected to the condenser, and the outlet of the condenser is connected to the evaporative condenser waste water tank.

3. The dilute sulfuric acid concentration device according to claim 2, characterized in that: The bottom of the evaporative condenser wastewater tank is connected to a wastewater pump.

4. The dilute sulfuric acid concentration device according to claim 3, characterized in that: The inlet of the wastewater pump is connected to the bottom outlet of the wastewater tank of the evaporative condenser through a pipeline, and the outlet of the wastewater pump serves as a drain outlet connected to the outside.

5. The dilute sulfuric acid concentration device according to claim 4, characterized in that: The wastewater pump is further provided with a gas phase outlet, and the gas phase outlet is connected to the top of the evaporative condenser wastewater tank.

6. The dilute sulfuric acid concentration device according to claim 3, characterized in that: The top of the evaporative condenser wastewater tank is connected to a vacuum pump; wherein, the inlet of the vacuum pump is connected to the top outlet of the evaporative condenser wastewater tank through a negative pressure pipeline.

7. The dilute sulfuric acid concentration device according to claim 1, characterized in that: A circulating water inlet is provided on one side of the lower end of the heating jacket, and a circulating water outlet is provided on the other side of the upper end thereof; and the heating jacket is also provided with a plurality of steam delivery pipelines.

8. The dilute sulfuric acid concentration device according to claim 1, characterized in that: A reflux pump is installed on the reflux pipeline.

9. The dilute sulfuric acid concentration device according to claim 1, characterized in that: Each pipeline in the concentration device is provided with one or more switch valves.

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