Hydrochloric acid recovery and evaporation device

Abstract

The utility model discloses a hydrochloric acid recovery evaporation device, which relates to the technical field of hydrochloric acid recovery, and comprises a delivery pump and a cooling tower, the output end of the delivery pump is connected with a waste acid liquid inlet pipe; according to the hydrochloric acid recycling and evaporating device, waste acid enters an evaporator through a conveying pump, and water in the evaporator is filtered and heated through a circulating pump, a bag type filter and a graphite heat exchanger, so that the waste acid in the evaporator is heated, and the waste acid is evaporated; evaporated acid-containing steam is subjected to water mist interception through a water mist interceptor at the top of the evaporator, then acid-containing gas is guided into the cooling tower through a conveying fan, cooling circulating water is cooled, and finally acid condensate is obtained and enters an acid storage tank through a liquid outlet and an acid liquid storage pipe to be stored. The acidic condensate is clear, the acidity recovery rate is 95% or above, and the acidic condensate can be recycled after reaching the recycling quality.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrochloric acid recovery, in particular to a hydrochloric acid recovery evaporation device. Background Art

[0002] With the continuous improvement of national environmental protection requirements and relevant standards, the level of clean production and circular economy technology has become an important factor in the survival and sustainable development of polluting enterprises. Enterprises must increase environmental protection investment and improve the level of pollutant control in order to become strong in market competition, among which the treatment of waste acid is more important.

[0003] In the existing waste acid treatment process, the waste acid recovery rate is low, and the evaporated acid-containing steam cannot be intercepted by water mist, which is easy to pollute the environment. Therefore, the utility model proposes a hydrochloric acid recovery evaporation device. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a hydrochloric acid recovery evaporation device, which solves the problems raised by the above-mentioned background technology.

[0005] The utility model solves the technical problem by adopting the following technical scheme: a hydrochloric acid recovery evaporation device, comprising a delivery pump and a cooling tower, wherein the output end of the delivery pump is connected with a waste acid liquid inlet pipe, the other end of the waste acid liquid inlet pipe is connected with an evaporator, a water mist interceptor is installed on the top of the evaporator, an air outlet pipe and a water outlet pipe are arranged on the outside of the evaporator, a delivery fan is connected with the end of the air outlet pipe, a bag filter is connected with the end of the water outlet pipe, a filter liquid outlet pipe is arranged on the outside of the bag filter, a circulating pump is connected with the end of the filter liquid outlet pipe, a circulating liquid outlet pipe is arranged on the outside of the circulating pump, a graphite heat exchanger is connected with the end of the circulating liquid outlet pipe, and a water inlet pipe is arranged on the outside of the graphite heat exchanger;

[0006] An air duct is arranged on the outside of the conveying fan, an air inlet and a liquid outlet are arranged on the outside of the cooling tower, one side of the liquid outlet is connected to an acid storage pipe, and the end of the acid storage pipe is connected to an acid storage tank.

[0007] As a further technical solution of the utility model, the input end of the delivery pump is connected to the waste acid connecting pipe, the output end of the delivery pump is connected to the liquid inlet end of the evaporator through the waste acid liquid inlet pipe, and the evaporator is connected to the input end of the delivery fan through the air outlet pipe.

[0008] As a further technical solution of the utility model, the water outlet end of the evaporator is connected to the bag filter through a water outlet pipe, and the bag filter is connected to the input end of the circulation pump through a filter liquid outlet pipe.

[0009] As a further technical solution of the utility model, the output end of the circulation pump is connected to the graphite heat exchanger through a circulation liquid outlet pipe, and the graphite heat exchanger is connected to the water inlet end of the evaporator through a water inlet pipe.

[0010] As a further technical solution of the utility model, the output end of the conveying fan is connected to the cooling tower through an air duct and an air inlet, the cooling tower and the acid storage tank are connected to the acid storage pipe through a liquid outlet, and an acid discharge pipe is provided on the outside of the acid storage tank.

[0011] The beneficial effects of the utility model are:

[0012] The utility model discloses a hydrochloric acid recovery evaporation device. The waste acid is introduced into the interior of an evaporator through a delivery pump, and the water in the evaporator is filtered and heated through a circulation pump, a bag filter and a graphite heat exchanger, so as to heat the waste acid in the evaporator to 60-70°C, so that the waste acid evaporates. The evaporated acid-containing steam is intercepted by the water mist interceptor on the top of the evaporator without polluting the environment. The acid-containing gas is introduced into the interior of a cooling tower through an air outlet pipe, an air guide pipe and an air inlet by a delivery fan, so that the cooling circulating water is cooled, and finally an acid condensate is obtained. The acid condensate is stored in an acid storage tank through a liquid outlet and an acid storage pipe. The acid condensate is relatively clear, and the acid recovery rate is above 95%, so that the acid condensate can be reused with the quality of reuse. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 It is a side view of the utility model;

[0016] Figure 3 It is a partial cross-sectional structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0017] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0018] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] Figure 1-3 As shown, a hydrochloric acid recovery evaporation device comprises a delivery pump 1 and a cooling tower 8, wherein the output end of the delivery pump 1 is connected to a waste acid liquid inlet pipe 21, the other end of the waste acid liquid inlet pipe 21 is connected to an evaporator 2, a water mist interceptor 3 is installed on the top of the evaporator 2, an air outlet pipe 22 and a water outlet pipe 23 are arranged on the outside of the evaporator 2, a delivery fan 7 is connected to the end of the air outlet pipe 22, a bag filter 5 is connected to the end of the water outlet pipe 23, a filter liquid outlet pipe 51 is arranged on the outside of the bag filter 5, a circulation pump 4 is connected to the end of the filter liquid outlet pipe 51, a circulation liquid outlet pipe 41 is arranged on the outside of the circulation pump 4, a graphite heat exchanger 6 is connected to the end of the circulation liquid outlet pipe 41, and a water inlet pipe 61 is arranged on the outside of the graphite heat exchanger 6;

[0020] Among them, an air duct 71 is arranged on the outside of the conveying fan 7, an air inlet 81 and a liquid outlet 82 are arranged on the outside of the cooling tower 8, one side of the liquid outlet 82 is connected to an acid storage pipe 91, and the end of the acid storage pipe 91 is connected to the acid storage tank 9.

[0021] Figure 1-3 As shown, the input end of the delivery pump 1 is connected to the waste acid connecting pipe, the output end of the delivery pump 1 is connected to the liquid inlet end of the evaporator 2 through the waste acid liquid inlet pipe 21, and the evaporator 2 is connected to the input end of the delivery fan 7 through the air outlet pipe 22, which is conducive to the evaporation of the waste acid.

[0022] Figure 1-3 As shown, the water outlet end of the evaporator 2 is connected to the bag filter 5 through the water outlet pipe 23, and the bag filter 5 is connected to the input end of the circulation pump 4 through the filter liquid outlet pipe 51, which is conducive to filtering the water inside the evaporator 2 and avoiding blockage.

[0023] Figure 1-3 As shown, the output end of the circulation pump 4 is connected to the graphite heat exchanger 6 through the circulation liquid outlet pipe 41, and the graphite heat exchanger 6 is connected to the water inlet end of the evaporator 2 through the water inlet pipe 61, which is conducive to heating the water and heating the waste acid to 60-70°C.

[0024] Figure 1-3As shown, the output end of the conveying fan 7 is connected to the cooling tower 8 through the air duct 71 and the air inlet 81, and the cooling tower 8 and the acid storage tank 9 are connected to the acid storage pipe 91 through the liquid outlet 82. An acid discharge pipe is provided on the outside of the acid storage tank 9, which is conducive to the acid-containing gas entering the interior of the cooling tower 8 for cooling to obtain acid condensate, which then enters the interior of the acid storage tank 9 for storage. This acid condensate is relatively clear, and the acidity recovery rate is above 95%, which can reach the quality of reuse.

[0025] The working principle of the utility model is as follows: during the use of the device, the waste acid enters the input end of the delivery pump 1, enters the interior of the evaporator 2 through the delivery pump 1 and the output end and the waste acid inlet pipe 21, and at the same time, the water inside the evaporator 2 passes through the circulation pump 4, enters the interior of the bag filter 5 through the outlet pipe 23 to filter the water quality, and then enters the input end of the circulation pump 4 through the filter outlet pipe 51, and then enters the interior of the graphite heat exchanger 6 through the output end of the circulation pump 4 and the circulation outlet pipe 41 to be heated, and at the same time, the heated water enters the interior of the evaporator 2 through the inlet pipe 61 to evaporation. The waste acid in the evaporator 2 is heated to 60-70° C., so that the waste acid evaporates. The evaporated acid-containing steam is intercepted by the water mist interceptor 3 on the top of the evaporator 2, and does not pollute the environment. The acid-containing gas is introduced into the interior of the cooling tower 8 by the conveying fan 7 through the air outlet pipe 22, the air guide pipe 71 and the air inlet 81, so that the cooling circulating water is cooled, and finally an acid condensate is obtained, which enters the interior of the acid storage tank 9 through the liquid outlet 82 and the acid storage pipe 91 for storage. The acid condensate is relatively clear, and the acid recovery rate is more than 95%, which can reach the quality of reuse for reuse.

[0026] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without departing from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A hydrochloric acid recovery evaporation device, characterized in that: The invention comprises a delivery pump (1) and a cooling tower (8), wherein the output end of the delivery pump (1) is connected to a waste acid liquid inlet pipe (21), the other end of the waste acid liquid inlet pipe (21) is connected to an evaporator (2), a water mist interceptor (3) is installed on the top of the evaporator (2), an air outlet pipe (22) and a water outlet pipe (23) are arranged on the outside of the evaporator (2), the end of the air outlet pipe (22) is connected to a delivery fan (7), the end of the water outlet pipe (23) is connected to a bag filter (5), the outside of the bag filter (5) is provided with a filtered liquid outlet pipe (51), the end of the filtered liquid outlet pipe (51) is connected to a circulation pump (4), the outside of the circulation pump (4) is provided with a circulating liquid outlet pipe (41), the end of the circulating liquid outlet pipe (41) is connected to a graphite heat exchanger (6), and the outside of the graphite heat exchanger (6) is provided with a water inlet pipe (61); An air guide pipe (71) is arranged on the outside of the conveying fan (7), an air inlet (81) and a liquid outlet (82) are arranged on the outside of the cooling tower (8), one side of the liquid outlet (82) is connected to an acid liquid storage pipe (91), and the end of the acid liquid storage pipe (91) is connected to an acid storage tank (9).

2. A hydrochloric acid recovery evaporation device according to claim 1, characterized in that: The input end of the delivery pump (1) is connected to the waste acid connecting pipe, the output end of the delivery pump (1) is connected to the liquid inlet end of the evaporator (2) through the waste acid liquid inlet pipe (21), and the evaporator (2) is connected to the input end of the delivery fan (7) through the air outlet pipe (22).

3. A hydrochloric acid recovery evaporation device according to claim 1, characterized in that: The water outlet end of the evaporator (2) is connected to the bag filter (5) through the water outlet pipe (23), and the bag filter (5) is connected to the input end of the circulation pump (4) through the filtration liquid outlet pipe (51).

4. A hydrochloric acid recovery evaporation device according to claim 1, characterized in that: The output end of the circulation pump (4) is connected to the graphite heat exchanger (6) via a circulation liquid outlet pipe (41), and the graphite heat exchanger (6) is connected to the water inlet end of the evaporator (2) via a water inlet pipe (61).

5. A hydrochloric acid recovery evaporation device according to claim 1, characterized in that: The output end of the conveying fan (7) is connected to the cooling tower (8) through the air guide pipe (71) and the air inlet (81), and the cooling tower (8) and the acid storage tank (9) are connected to the acid liquid storage pipe (91) through the liquid outlet (82), and the outer side of the acid storage tank (9) is provided with an acid liquid discharge pipe.

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