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250 Lawrence K. Wang et al.

Table 16
Venturi Scrubber Equipment Costs
Flow rate Venturi scrubber cost
(acfm) ($)
10,000 ≤ Q < 50,000 VSC = $7250 + 0.585(Q )
e,a e,a
50,000 ≤ Q ≤ 150,000 VSC = $11.10(Q ) 0.7513
e,a e,a
Note: Carbon steel construction; includes cost of instrumentation.
Source: refs. 26 and 27.

viously discussed, if good agreement is not found, this indicates the use of the wrong
performance chart to size the scrubber, improper operation of the scrubber, or both.
The net result will be delay in permit approval, if not outright rejection of the permit
by the regulating agency.

Example 15
A step-by-step estimation of capital and annual costs of a Venturi scrubber is presented.
Solution
A. Purchased Equipment and Total Capital Costs
As with other scrubber systems discussed in this handbook, the capital cost of a
Venturi scrubber system is the total of the initial purchase price of the system and the
direct and indirect costs of installation. Initial purchase cost (PC) includes shipping
and taxes in addition to agreed sale price of the system. The equipment cost must also
take into account the cost of any auxiliary equipment cost (Aex) purchased as part of
the Venturi scrubber project. The PC may be estimated from Table 16 and the EC was
discussed previously.

1. The Venturi scrubber cost (VSC) can be estimated from Table 16:
VSC = $
If the material construction for scrubber requires 304L stainless steel (SS), 2.3 is the
cost multiplier; if 316 SS is used, the multiplier is 3.2. The upgrade VSC is
VSC = $ × 2.3 or 3.2 (if applicable)
2. Equipment cost is computed as follows:
EC = VSC + Aex = $

3. Purchased equipment cost
PEC = 1.08 × EC = $
4. Total capital cost (TCC): The factors given in Table 9 are now used to estimate the
TCC:
TCC = 1.91 × PEC + SP + building = $
B. Direct Annual Costs—Venturi Scrubber
The direct annual costs include electric power cost, water, operating labor, and main-
tenance costs.